access class control(eran8.1_03)

7/25/2019 Access Class Control(ERAN8.1_03)

http://slidepdf.com/reader/full/access-class-controleran8103 1/90

eRAN

Access Class Control Feature

Parameter Description

Issue 03

Date 2015-11-03

HUAWEI TECHNOLOGIES CO., LTD.



Copyright © Huawei Technologies Co., Ltd. 2015. All rights reserved.

No part of this document may be reproduced or transmitted in any form or by any means without prior written

consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.

All other trademarks and trade names mentioned in this document are the property of their respective

holders.

Notice

The purchased products, services and features are stipulated by the contract made between Huawei and the

customer. All or part of the products, services and features described in this document may not be within thepurchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,

and recommendations in this document are provided "AS IS" without warranties, guarantees or

representations of any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in the

preparation of this document to ensure accuracy of the contents, but all statements, information, and

recommendations in this document do not constitute a warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base

Bantian, Longgang

Shenzhen 518129

People's Republic of China

Website: http://www.huawei.com

Email: [email protected]

Issue 03 (2015-11-03) Huawei Proprietary and Confidential

Copyright © Huawei Technologies Co., Ltd.

i

http://www.huawei.com/



Contents

1 About This Document.................................................................................................................. 1

1.1 Scope.............................................................................................................................................................................. 1

1.2 Intended Audience..........................................................................................................................................................1

1.3 Change History...............................................................................................................................................................2

1.4 Differences Between eNodeB Types..............................................................................................................................4

2 Overview......................................................................................................................................... 5

2.1 Introduction.................................................................................................................................................................... 5

2.2 Benefits...........................................................................................................................................................................5

2.3 Architecture.................................................................................................................................................................... 6

3 Technical Description...................................................................................................................8

3.1 Related Concepts............................................................................................................................................................8

3.2 Static AC Control......................................................................................................................................................... 10

3.2.1 Static AC Control Procedure..................................................................................................................................... 103.2.2 Access Decision Procedure........................................................................................................................................11

3.3 Intelligent AC Control..................................................................................................................................................19

3.3.1 Intelligent AC Control Procedure..............................................................................................................................19

3.3.2 Implementation Principles.........................................................................................................................................20

3.4 Dynamic SSAC.............................................................................................................................................................23

3.4.1 Dynamic SSAC Procedure........................................................................................................................................ 23

3.4.2 Implementation Principles.........................................................................................................................................24

4 Related Features...........................................................................................................................27

4.1 Features R elated to LOFD-070207 Intelligent Access Class Control..........................................................................27

4.2 Features Related to LOFD-008002 Dynamic Service-specific Access Control...........................................................27

5 Network Impact........................................................................................................................... 29

5.1 LOFD-070207 Intelligent Access Class Control..........................................................................................................29

5.2 LOFD-008002 Dynamic Service-specific Access Control...........................................................................................29

6 Engineering Guidelines............................................................................................................. 30

6.1 Static AC control.......................................................................................................................................................... 30

6.1.1 When to Use Static AC Control................................................................................................................................ 30

6.1.2 Required Information................................................................................................................................................ 30

6.1.3 Planning.....................................................................................................................................................................30

eRAN

Access Class Control Feature Parameter Description Contents



ii



6.1.3.1 RF Planning............................................................................................................................................................30

6.1.3.2 Network Planning...................................................................................................................................................30

6.1.3.3 Hardware Planning................................................................................................................................................. 30

6.1.4 Deployment............................................................................................................................................................... 30

6.1.4.1 Requirements..........................................................................................................................................................31

6.1.4.2 Data Preparation..................................................................................................................................................... 31

6.1.4.3 Activation............................................................................................................................................................... 37

6.1.4.4 Activation Observation...........................................................................................................................................39

6.1.4.5 Reconfiguration...................................................................................................................................................... 40

6.1.4.6 Deactivation............................................................................................................................................................40

6.1.5 Performance Monitoring............................................................................................................................................41

6.1.6 Parameter Optimization.............................................................................................................................................41

6.1.7 Troubleshooting.........................................................................................................................................................41

6.2 Intelligent AC control...................................................................................................................................................41

6.2.1 When to Use Intelligent AC Control......................................................................................................................... 41


6.2.3 Planning.....................................................................................................................................................................42

6.2.3.1 RF Planning............................................................................................................................................................42



6.2.4 Deployment............................................................................................................................................................... 42

6.2.4.1 Requir ements..........................................................................................................................................................42

6.2.4.2 Data Preparation..................................................................................................................................................... 426.2.4.3 Activation............................................................................................................................................................... 45



6.2.4.6 Deactivation............................................................................................................................................................47




6.3 Dynamic SSAC.............................................................................................................................................................48

6.3.1 When to Use Dynamic SSAC....................................................................................................................................48


6.3.3 Planning.....................................................................................................................................................................49

6.3.3.1 RF Planning............................................................................................................................................................49



6.3.4 Deployment............................................................................................................................................................... 49

6.3.4.1 Requir ements..........................................................................................................................................................49

6.3.4.2 Data Preparation..................................................................................................................................................... 50

6.3.4.3 Activation............................................................................................................................................................... 52


eRAN




iii




6.3.4.6 Deactivation............................................................................................................................................................54




7 Parameters.....................................................................................................................................57

8 Counters........................................................................................................................................ 80

9 Glossary.........................................................................................................................................84

10 Reference Documents...............................................................................................................85

eRAN




iv



1 About This Document

1.1 Scope

This document describes access class (AC) control, including its technical principles, related

features, network impact, and engineering guidelines.

This document covers the following features:

l LOFD-070207 Intelligent Access Class Control

l LOFD-008002 Dynamic Service-specific Access Control

Any managed objects (MOs), parameters, alarms, or counters described herein correspond to

the software release delivered with this document. Any future updates will be described in the product documentation delivered with future software releases.

This document applies only to LTE FDD. Any "LTE" in this document refers to LTE FDD,

and "eNodeB" refers to LTE FDD eNodeB.

This document applies to the following types of eNodeBs.

eNodeB Type Model

Macro 3900 series eNodeB

Micro BTS3202E

LampSite DBS3900 LampSite

1.2 Intended Audience

This document is intended for personnel who:

l Need to understand access class control

l Work with Huawei products

eRAN

Access Class Control Feature Parameter Description 1 About This Document



1



1.3 Change History

This section provides information about the changes in different document versions. There are

two types of changes:

l Feature change

Changes in features and parameters of a specified version as well as the affected entities

l Editorial change

Changes in wording or addition of information and any related parameters affected by

editorial changes. Editorial change does not specify the affected entities.

eRAN8.1 03 (2015-11-03)

This issue includes the following changes.

ChangeType

Change Description Parameter Change Affected Entity

Feature

change

None None N/A

Editorial

change

Revised some descriptions in

the document.

None N/A

eRAN8.1 02 (2015-06-30)

This issue includes the following changes.

Change Type Change Description ParameterChange

AffectedEntity

Feature change None None N/A

Editorial

change

l Reorganized this document.

l Revised descriptions in the following

sections:

– 2.1 Introduction

– 2.2 Benefits

– 3.3.2 Implementation Principles

– 3.4.2 Implementation Principles

– 5.2 LOFD-008002 Dynamic

Service-specific Access Control

– 6 Engineering Guidelines

None N/A

eRAN




2



eRAN8.1 01 (2015-03-23)

This issue does not include any changes.

eRAN8.1 Draft A (2015-01-15)Compared with Issue 01 (2014-04-26) of eRAN7.0, Draft A (2015-01-15) of eRAN8.1

includes the following changes.

ChangeType

Change Description Parameter Change Affected Entity

Feature

change

Added LOFD-008002

Dynamic Service-

specific Access

Control. For details

about this feature, see

3.4 Dynamic SSACand 6 Engineering

Guidelines.

Added the following

parameters:

l CellAlgoSwitch. AcBarAlg

oforDynSwitch

l CellDynAcBarAlgo-Para. DisasterReferenceInd

l CellDynAcBarAlgo-

Para. DisasterDuration

l CellDynAcBarAlgo-

Para. SsacTriggerCondSa-

tiPeriods

l CellDynAcBarAlgo-

Para. SsacCancelCondSati-

Periods

Macro, micro,

and LampSite

eNodeBs

Optimized themechanisms for

triggering and

canceling intelligent

AC control. For details,

see 3.3 Intelligent AC

Control and 6

Engineering

Guidelines.

Added the following parameters:

l CellDynAcBarAlgo-

Para. MoTriggerCondSati-

Periods

l CellDynAcBarAlgo-

Para. MoCancelCondSati-

Periods

Macro, micro,and LampSite

eNodeBs

Added the policy

options for determining

whether a cell iscongested. For details,

see 3.3.2

Implementation

Principles and 3.4.2

Implementation

Principles.

Added the following

parameters:

l EnodebFlowCtrlPara. Dyn AcBarPolicyMode

l EnodebFlowCtrlPara.Cpu

LoadThd

Macro, micro,

and LampSite

eNodeBs

Editorial

change

Revised the description

in this document.

None N/A

eRAN




3



1.4 Differences Between eNodeB Types

Feature Support by Macro, Micro, and LampSite eNodeBs

Feature ID FeatureName

Supported byMacroeNodeBs

Supported byMicroeNodeBs

Supported byLampSiteeNodeBs

LOFD-070207 Intelligent

Access Class

Control

Yes Yes Yes

LOFD-008002 Dynamic

Service-

specific Access

Control

Yes Yes Yes

Function Implementation in Macro, Micro, and LampSite eNodeBs

Function Difference

Triggering of flow

control in

intelligent AC

control

For macro eNodeBs, flow control is triggered by a large amount of

RRC signaling or RACH signaling. For micro eNodeBs, flow control

is triggered only by a large amount of RACH signaling. For details,

see 3.3.2 Implementation Principles.

eRAN




4



2 Overview

2.1 Introduction

Access class (AC) control is used to manage UE access to a network, as defined by 3GPP.

With AC control, the eNodeB broadcasts AC control parameters using system information

block type 2 (SIB2) to all UEs in a cell. According to section 5.3.3 "RRC connection

establishment" in 3GPP TS 36.331 V11.2.0, only UEs originating services perform access

decision after receiving AC control parameters from the eNodeB. UEs handed over from

other cells or UEs terminating services do not perform access decision.

Huawei provides the following AC control methods:

l Static AC control

After AC control parameters are configured on the Operating Support System (OSS) by

operators, the eNodeB broadcasts parameters to UEs through system information (SI),

without considering the current network load.

l Intelligent AC control

The eNodeB determines whether to adjust and deliver AC control parameters for mobile

originated data (MO data) and mobile originated signaling (MO signaling) in a cell based

on the cell congestion state.

l Dynamic service specific access control (SSAC)

The eNodeB determines whether to adjust and deliver AC control parameters for

multimedia telephony voice and video in a cell based on cell disaster and congestionstates.

2.2 Benefits

Different AC control methods offer different benefits:

l Static AC control

Static AC control uses operator-configured parameters to ensure smooth UE access and

relieve cell congestion when a large number of UEs simultaneously access a network.


Compared with static AC control, intelligent AC control offers the following benefits:

eRAN

Access Class Control Feature Parameter Description 2 Overview



5



– Controls UE access for MO data or signaling to prevent a sharp increase in

signaling load.

– Performs AC control based on the cell congestion state without manual

intervention.

l Dynamic SSAC

Compared with static AC control, dynamic SSAC offers the following benefits:

– Controls the access of UEs originating multimedia telephony voice or video to

prevent network congestion and ensure that UEs originating data services can

timely access the disaster bulletin information on the network.

– Performs AC control based on the disaster state and cell congestion state without

manual intervention.

2.3 Architecture

Static AC Control

Figure 2-1 shows the network architecture for static AC control.

Figure 2-1 Network architecture for static AC control

1. AC control parameters configured on the OSS are sent to the eNodeB.

2. The eNodeB broadcasts the parameters using SIB2 to UEs.

3. The UEs determine whether to initiate access to this cell.

Intelligent AC Control

Figure 2-2 shows the network architecture for intelligent AC control.

Figure 2-2 Network architecture for intelligent AC control


2. The eNodeB determines whether to trigger AC control based on the cell congestion state.

3. The eNodeB broadcasts the parameters using SIB2 to UEs if trigger conditions are met.

eRAN




6



4. The eNodeB periodically checks whether cell congestion is relieved. If no, it adjusts

access probability factors to expand the control range until the cell congestion is

relieved.

5. The eNodeB broadcasts the adjusted parameters using SIB2 to the UEs.


Dynamic SSAC

Figure 2-3 shows the network architecture for dynamic SSAC.

Figure 2-3 Network architecture for dynamic SSAC


2. The eNodeB determines whether to trigger dynamic SSAC based on the cell disaster and

congestion states.

3. The eNodeB broadcasts the parameters using SIB2 to UEs if trigger conditions are met.

4. The eNodeB periodically checks whether the cell congestion is relieved or the disaster

state is ended. If no, it adjusts access probability factors to expand the control range or

maintains the access probability factors until the cell congestion is relieved or the

disaster state is ended.

5. The eNodeB broadcasts the adjusted parameters to the UEs until the cell congestion is

relieved or the disaster state is ended.


eRAN




7



3 Technical Description

3.1 Related Concepts

Access Types

SIB2 can contain the following access types in the ac-BarringInfo IE:

l Emergency call

l MO data

l MO signaling

l Multimedia telephony voicel Multimedia telephony video

l CS fallback (CSFB)

When a UE switches from idle mode to connected mode, it sends an RRC Connection

Request message to the eNodeB. The UE determines whether its access is allowed based on

access barring information broadcast in system information and the cause of RRC connection

setup or the cause of UE access. The CellAcBar. AcBarringInfoCfgInd parameter specifies

whether access barring information is broadcast.

NOTE

When selecting a cell to camp on, a UE does not consider access barring information, which means thata UE of a specific AC can camp on a cell even if this AC is barred. In addition, the UE does not perform

cell reselection when the indicated access barring information changes.

AC Control Parameters

For emergency calls, the ac-BarringForEmergency parameter is defined to specify whether to

prohibit emergency calls from accessing a cell.

For other access types, the following parameters are defined in 3GPP specifications:

l ac-BarringFactor

A random number (rand ) is generated by a UE after it initiates an access request. If thevalue of rand is less than that of ac-BarringFactor, the UE proceeds with the access

eRAN

Access Class Control Feature Parameter Description 3 Technical Description



8



procedure. If the value of rand is greater than or equal to that of ac-BarringFactor, the

UE stops the access procedure.

l ac-BarringTime

Together with rand , this parameter determines the duration for barring this access

request as follows:

Access barring duration = (0.7 + 0.6 x rand ) x ac-BarringTime

After the duration ends, the UE generates a rand and compares it with ac-BarringFactor

again.

l ac-BarringForSpecialAC

This parameter determines whether UEs of AC 11 to AC 15 can access a cell.

According to 3GPP specifications, ac-BarringFactor can be set only to P00(0%) when any of

the bits of ac-BarringForSpecialAC is set to 1. For details, see section 6.3.1 "System

information blocks" in 3GPP TS 36.331 V11.2.0.

AC Control Methods

Huawei provides the following AC control methods:

l Static AC control


l Dynamic SSAC

Table 3-1 describes the access types, control policies, and application scenarios of the AC

control methods.

Table 3-1 Access types, control policies, and application scenarios of the AC control methods

Category Access Type Control Policy Application Scenarios

3.2 Static AC

Control

l Emergency

call

l MO data

l MO signaling

l Multimedia

telephony

voice

l Multimedia

telephonyvideo

l CSFB

The eNodeB

broadcasts AC

control parameters

to UEs, without

considering the

current network

load.

A large number of UEs

simultaneously access the

network.

eRAN




9



Category Access Type Control Policy Application Scenarios

3.3 Intelligent

AC Control

l MO data

l MO signaling

The eNodeB

determines

whether to adjust

and send AC

control parameters

in a cell based on

the cell congestion

state.

Application scenarios:

l A large number of UEs

simultaneously access thenetwork.

l If intelligent AC control is

enabled in a congested cell,

new UEs may not be able

to access the network. If

this impact is acceptable,

intelligent AC control can

be enabled permanently to

relieve cell congestion,

even unpredictable

congestion.

3.4 Dynamic

SSAC

l Multimedia

telephony

voice

l Multimedia

telephony

video

The eNodeB

determines

whether to adjust

and send AC

control parameters

in a cell based on

the cell disaster

and congestion

states.

Application scenarios:


simultaneously access the

network. It is recommended

that this method be used for

disasters such as

earthquakes and tsunamis.


simultaneously originate

multimedia telephony voice

or video.

3.2 Static AC Control

3.2.1 Static AC Control Procedure

When the CellAlgoSwitch. AcBarAlgoSwitch parameter is set to

ACBAR_SWITCH_STATIC, static AC control is enabled.

NOTE

When the CellAlgoSwitch. AcBarAlgoSwitch parameter is set to

ACBAR_SWITCH_DISABLE(Disable), AC control is disabled.

Figure 3-1 shows the static AC control procedure, involving all access types.

eRAN




10



Figure 3-1 Static AC control procedure

NOTE

For emergency call, MO signaling, MO data, and CSFB, the UE checks in the access stratum whether to

initiate cell access.

For multimedia telephony voice and video, the UE checks in the non-access stratum whether to initiate

cell access. If the check is passed and the AC control parameters for MO data are available, the UE then

checks again in the access stratum whether to initiate cell access.

AC barring for different access types is controlled by the following parameters in the

CellAcBar MO:

l CellAcBar. AcBarringForEmergency for emergency calls (AC 10)

l CellAcBar. AcBarringForMoDataCfgInd for MO data

l CellAcBar. AcBarringForMoSigCfgInd for MO signaling

l CellAcBar. AcBarForMVoiceCfgInd for multimedia telephony voice

l CellAcBar. AcBarForMVideoCfgInd for multimedia telephony video

l CellAcBar. AcBarForCsfbCfgInd for CSFB

The UE determines whether its access is barred based on the AC control parameters received

from the eNodeB. For details, see 3.2.2 Access Decision Procedure.

NOTE

For details about the list of barred ACs and how a UE determines its AC, see chapter 4 "Access control"

in 3GPP TS 22.011 V10.0.0 and section 3.4 "Access control" in 3GPP TS 23.122 V10.0.0.

3.2.2 Access Decision Procedure

This section describes the access decision procedures that UEs perform after receiving ACcontrol parameters from the eNodeB.

eRAN




11



Emergency Calls

Figure 3-2 shows the access decision procedure for emergency calls.

Figure 3-2 Access decision procedure for emergency calls

MO Data

Figure 3-3 shows the access decision procedure for MO data.

eRAN




12



Figure 3-3 Access decision procedure for MO data

The access barring timer for MO data is started by the originating UE. The timer length is

calculated based on the value of the CellAcBar. AcBarTimeForCall parameter. For details,

see section 5.3.3.11 "Access barring check" in 3GPP TS 36.331 V11.2.0.

The AC control for MO data is specified by the following parameters:

l CellAcBar. AcBarringFactorForCall : specifies the access probability factor for MO

data.

l CellAcBar. AcBarTimeForCall : specifies the access barring duration for MO data.

l CellAcBar. AC11BarforCall : specifies the access barring indicator for MO data on UEs

of AC 11.


of AC 12.


of AC 13.

l

CellAcBar. AC14BarforCall : specifies the access barring indicator for MO data on UEsof AC 14.

eRAN




13




of AC 15.

The CellAcBar. AcBarringFactorForCall parameter can be set only to P00(0%) when any of

the parameters CellAcBar. AC11BarforCall to CellAcBar. AC15BarforCall is set to

BOOLEAN_TRUE(true).

MO Signaling

Figure 3-4 shows the access decision procedure for MO signaling.

Figure 3-4 Access decision procedure for MO signaling

The access barring timer for MO signaling is started by the originating UE. The timer length

is calculated based on the value of the CellAcBar. AcBarTimeForSig parameter. For details,


The AC control for MO signaling is specified by the following parameters:

l

CellAcBar. AcBarringFactorForSig : specifies the access probability factor for MOsignaling.

eRAN




14



l CellAcBar. AcBarTimeForSig : specifies the access barring duration for MO signaling.

l CellAcBar. AC11BarForSig : specifies the access barring indicator for MO signaling on

UEs of AC 11.


UEs of AC 12.


UEs of AC 13.


UEs of AC 14.


UEs of AC 15.

The CellAcBar. AcBarringFactorForSig parameter can be set only to P00(0%) when any of

the parameters CellAcBar. AC11BarForSig to CellAcBar. AC15BarForSig is set to

BOOLEAN_TRUE(true).

Multimedia Telephony Voice

Figure 3-5 shows the access decision procedure for multimedia telephony voice.

eRAN




15



Figure 3-5 Access decision procedure for multimedia telephony voice

The access barring timer for multimedia telephony voice is started by the originating UE. The

timer length is calculated based on the value of the CellAcBar. AcBarTimeForMVoice

parameter. For details, see section 5.3.3.11 "Access barring check" in 3GPP TS 36.331

V11.2.0.

The AC control for multimedia telephony voice is specified by the following parameters:

l CellAcBar. AcBarFactorForMVoice: specifies the access probability factor for

multimedia telephony voice.

l CellAcBar. AcBarTimeForMVoice: specifies the access barring duration for multimedia

telephony voice.

l CellAcBar. SpecialACBarForMVoice: specifies the access barring indicators for

multimedia telephony voice on UEs of ACs 11 to 15.

The access barring indicators for multimedia telephony voice on UEs of ACs 11 to 15 are

specified by the bits of the CellAcBar. SpecialACBarForMVoice parameter.

The CellAcBar. AcBarFactorForMVoice parameter can be set only to P00(0%) when anyoption under the CellAcBar. SpecialACBarForMVoice parameter is selected.

eRAN




16



Multimedia Telephony Video

Figure 3-6 shows the access decision procedure for multimedia telephony video.

Figure 3-6 Access decision procedure for multimedia telephony video

The access barring timer for multimedia telephony video is started by the originating UE. The

timer length is calculated based on the value of the CellAcBar. AcBarTimeForMVideo

parameter. For details, see section 5.3.3.11 "Access barring check" in 3GPP TS 36.331

V11.2.0.

The AC control for multimedia telephony video is specified by the following parameters:

l CellAcBar. AcBarFactorForMVideo: specifies the access probability factor for

multimedia telephony video.

l CellAcBar. AcBarTimeForMVideo: specifies the access barring duration for multimedia

telephony video.

l CellAcBar. SpecialACBarForMVideo: specifies the access barring indicators for

multimedia telephony video on UEs of ACs 11 to 15.

eRAN




17



The access barring indicators for multimedia telephony video on UEs of ACs 11 to 15 are

specified by the bits of the CellAcBar. SpecialACBarForMVideo parameter.

The CellAcBar. AcBarFactorForMVideo parameter can be set only to P00(0%) when any

option under the CellAcBar. SpecialACBarForMVideo parameter is selected.

CSFB

The UE uses the following rules to make access decisions on CSFB:

l If AC control parameters from the eNodeB contain CSFB-related parameters, these

parameters are used.

l If AC control parameters from the eNodeB do not contain CSFB-related parameters, AC

control parameters for MO data are used.

Figure 3-7 shows the access decision procedure for CSFB.

Figure 3-7 Access decision procedure for CSFB

eRAN




18



The access barring timer for CSFB is started by the UE initiating the CSFB. The timer length

is calculated based on the value of the CellAcBar. AcBarTimeForCsfb parameter. For details,


The AC control for CSFB is specified by the following parameters:

l CellAcBar. AcBarFactorForCsfb: specifies the access probability factor for CSFB.

l CellAcBar. AcBarTimeForCsfb: specifies the access barring duration for CSFB.

l CellAcBar. SpecialACBarForCsfb: specifies the access barring indicators for CSFB on

UEs of ACs 11 to 15.

The access barring indicators for CSFB on UEs of ACs 11 to 15 are specified by the bits of

the CellAcBar. SpecialACBarForCsfb parameter.

The CellAcBar. AcBarFactorForCsfb parameter can be set only to P00(0%) when any

option under the CellAcBar. SpecialACBarForCsfb parameter is selected.

If access to an E-UTRAN cell is barred, the UE selects a GERAN or UTRAN cell through the

cell reselection procedure to ensure improved user experience. For details, see section 5.6.1.6

"Abnormal cases in the UE" in 3GPP TS 24.301 V10.0.0.

3.3 Intelligent AC Control

3.3.1 Intelligent AC Control Procedure

Intelligent AC control is enabled when the following conditions are met:

l The CellAlgoSwitch. AcBarAlgoSwitch parameter is set to

ACBAR_SWITCH_DYNAMIC(dynamic configuration).

l The DYNAMIC_FOR_MO(DYNAMIC_FOR_MO) option of the

CellAlgoSwitch. AcBarAlgoforDynSwitch parameter is selected.

Under these parameter settings, intelligent AC control is applied to MO data and MO

signaling, and static AC control (if configured) is applied to other access types.

Figure 3-8 shows the intelligent AC control procedure.

eRAN




19



Figure 3-8 Intelligent AC control procedure

3.3.2 Implementation Principles

Cell Congestion Checking

After intelligent AC control is enabled, the eNodeB periodically checks the cell state based on

the CellDynAcBarAlgoPara. DynAcBarStatPeriod parameter.

Table 3-2 describes the congestion trigger and congestion relief conditions based on the

EnodebFlowCtrlPara. DynAcBarPolicyMode parameter.

eRAN




20



Table 3-2 Congestion trigger and congestion relief conditions

Value ofEnodebFlowCtrlPara. DynAcBarPolicyMo

de

Congestion TriggerCondition

Congestion ReliefCondition

FLOWCONTROL The ratio of the flow control

duration to the measurement

duration is greater than or

equal to the value of

CellDynAcBarAlgo-

Para. DynAcBarTriggerThd .

The ratio of the flow control

duration to the measurement

duration is less than or equal

to the value of

CellDynAcBarAlgo-

Para. DynAcBarCancelThd .

CPULOAD The proportion of CPU

overload time is greater than or


CellDynAcBarAlgo-Para. DynAcBarTriggerThd .

The CPU overload time is the

time during which the CPU

usage of the main control

board or baseband processing

unit for a cell is greater than or


EnodebFlowCtrlPara.CpuLo

adThd .

The proportion of CPU

overload time is less than or


CellDynAcBarAlgo-Para. DynAcBarCancelThd .

The CPU overload time is the

time during which the CPU

usage of the main control

board or baseband processing

unit for a cell is greater than or


EnodebFlowCtrlPara.CpuLo

adThd .

NOTE

For details about flow control, see Flow Control Feature Parameter Description.

For macro eNodeBs, flow control is triggered by a large amount of RRC signaling or RACH signaling.

The cells on the same board have the same flow control state because flow control is performed at the

board level. If the CellDynAcBarAlgoPara. DynAcBarTriggerThd parameter is set to the same value

for the cells on a board, the congestion states of the cells are the same. It is recommended that the same

AC control parameters be configured for cells on the same board. For micro eNodeBs, flow control is

triggered only by a large amount of RACH signaling.

If the EnodebFlowCtrlPara. DynAcBarPolicyMode parameter is modified during the

measurement period specified by the CellDynAcBarAlgoPara. DynAcBarStatPeriod

parameter, the eNodeB checks whether the cell is congested based on the cell statesdetermined using both policies.

For example, the measurement period is 20s, the flow control policy is used in the first 10s,

and the CPU usage policy is used in the second 10s. 20 cell states are obtained in the

measurement period. The first 10 states are obtained when the flow control policy is used, and

the second 10 states are obtained when the CPU usage policy is used. Based on the 20 cell

states, the eNodeB calculates the proportion of time during which the cell is in the congestion

state to determine whether the cell is congested during the measurement period.

Triggering of Intelligent AC Control

After intelligent AC control is enabled, the eNodeB periodically checks whether a cell iscongested and counts the number of consecutive periods during which the cell is congested.

eRAN




21



If the number of consecutive periods during which the cell is congested reaches the value of

the CellDynAcBarAlgoPara. MoTriggerCondSatiPeriods parameter, the eNodeB triggers

intelligent AC control. The eNodeB sends AC control parameters using SIB2 to dynamically

adjust the access probability factor CellAcBar. AcBarringFactorForSig or

CellAcBar. AcBarringFactorForCall .

Handling After Intelligent AC Control Is Triggered

If intelligent AC control triggered in the last period is not canceled in the current period, the

eNodeB checks whether the cell is congested in the current period.

l If the cell is congested, AC control cannot be canceled, and the eNodeB gradually

decreases the access probability factor value to increase the proportion of barred UEs.

The access barring duration is not adjusted.

l If the cell congestion is relieved, then:

– If the number of consecutive periods during which the cell congestion is relieved is

less than the value of the CellDynAcBarAlgoPara. MoCancelCondSatiPeriods parameter, the eNodeB maintains the broadcast access probability factor for MO

data or MO signaling.

– If the number of consecutive periods during which the cell congestion is relieved

reaches the value of the CellDynAcBarAlgoPara. MoCancelCondSatiPeriods

parameter, the eNodeB sends SIB2 that does not contain AC control configurations

for MO data or MO signaling to UEs to cancel AC control on MO signaling or MO

data. AC control on other access types is not canceled.

NOTE

The value of the CellDynAcBarAlgoPara. DynAcBarCancelThd parameter must be less than the value

of the CellDynAcBarAlgoPara. DynAcBarTriggerThd parameter.

Access Probability Factor Adjustment

Access probability factors are defined in section 6.3.1 "System information blocks" in 3GPP

TS 36.331 V11.2.0. After intelligent AC control is enabled, the access probability factors are

selected in descending order until cell congestion is relieved. The AC barring duration is the

same as the duration configured for static AC control. Figure 3-9 shows the detailed access

probability factor adjustment procedure.

Figure 3-9 Detailed access probability factor adjustment procedure

eRAN




22



To ensure that some UEs can access the cell, the minimum access probability factor is

P05(5%). If cell congestion is not immediately relieved even with an access probability factor

of P05(5%), then P05(5%) is retained until cell congestion is eventually relieved.

If the cell is congested again, the access probability factor is selected in descending order

from P95(95%) again.

3.4 Dynamic SSAC

3.4.1 Dynamic SSAC Procedure

Dynamic SSAC is enabled when the following conditions are met:

l The CellAlgoSwitch. AcBarAlgoSwitch parameter is set to

ACBAR_SWITCH_DYNAMIC(dynamic configuration).

l The DYNAMIC_FOR_SSAC(DYNAMIC_FOR_SSAC) option of theCellAlgoSwitch. AcBarAlgoforDynSwitch parameter is selected.

Under these parameter settings, dynamic SSAC is applied to multimedia telephony voice and

video, and static AC control (if configured) is applied to other access types.

Figure 3-10 shows the dynamic SSAC procedure.

eRAN




23



Figure 3-10 Dynamic SSAC Procedure

3.4.2 Implementation Principles

Cell Disaster and Congestion Checking

After dynamic SSAC is enabled, the eNodeB periodically checks whether a cell is in a

disaster or congestion state based on the CellDynAcBarAlgoPara. DynAcBarStatPeriod

parameter.

l Disaster state

– The cell enters a disaster state when it receives an earthquake and tsunami warning

system (ETWS) primary notification (PN) or commercial mobile alert system

(CMAS) message configured by theCellDynAcBarAlgoPara. DisasterReferenceInd parameter for the cell.

eRAN




24



– The disaster state duration is specified by the

CellDynAcBarAlgoPara. DisasterDuration parameter. The cell exits the disaster

state when this duration ends.

NOTE

The duration specified by the CellDynAcBarAlgoPara. DisasterDuration parameter isindependent of the value of the CellDynAcBarAlgoPara. DisasterReferenceInd parameter.

The duration starts when the cell receives a disaster notification message.

l Congestion state

The methods for determining whether a cell is in a congestion state are the same as those

for intelligent AC control. For details, see Cell Congestion Checking in 3.3.2

Implementation Principles.

Triggering of SSAC

After dynamic SSAC is enabled, the eNodeB periodically checks whether a cell is in a

congestion or disaster state and counts the number of consecutive periods during which the

cell is in a congestion or disaster state.

When the number of consecutive periods during which a cell is in a congestion or disaster

state reaches the value of CellDynAcBarAlgoPara. SsacTriggerCondSatiPeriods, the

eNodeB triggers dynamic SSAC for the cell. The eNodeB sends AC control parameters using

SIB2 to dynamically adjust the access probability factor CellAcBar. AcBarFactorForMVoice

or CellAcBar. AcBarFactorForMVideo.

Handling After Dynamic SSAC Is Triggered

If dynamic SSAC triggered in the last period is not canceled in the current period, the eNodeB

checks whether the cell is in a congestion or disaster state in the current period.

l If the cell is in congestion and disaster states at the same time, AC control cannot be

canceled and the eNodeB gradually decreases the access probability factor value for the

cell to increase the proportion of barred UEs. The access barring duration is not adjusted.

l If the cell is not in congestion and disaster states at the same time, then:

– If the number of consecutive periods during which the cell is out of the congestion

or disaster state does not reach the value of the

CellDynAcBarAlgoPara. SsacCancelCondSatiPeriods parameter, the eNodeB

maintains the broadcast access probability factor for multimedia telephony voice or

video.

– If the number of consecutive periods during which the cell is out of the congestion

or disaster state reaches the value of theCellDynAcBarAlgoPara. SsacCancelCondSatiPeriods parameter, the eNodeB

broadcasts SIB2 that does not contain AC control parameters for multimedia

telephony voice or video to cancel AC control on multimedia telephony voice or

video.

NOTE

The value of the CellDynAcBarAlgoPara. DynAcBarCancelThd parameter must be less than the value

of the CellDynAcBarAlgoPara. DynAcBarTrigg erThd parameter.

Access Probability Factor Adjustment

After dynamic SSAC is started, the eNodeB adjusts the access probability factors until thecell congestion is relieved or the cell disaster state is ended. The adjustment mechanism is the

eRAN




25



same as that described in Access Probability Factor Adjustment in 3.3.2 Implementation

Principles.

eRAN




26



4 Related Features

4.1 Features Related to LOFD-070207 Intelligent AccessClass Control

Prerequisite Features

The prerequisite feature is LBFD-002009 Broadcast of system information because the

eNodeB broadcasts AC control parameters using SIB2.

Mutually Exclusive Features None

Impacted Features

None

4.2 Features Related to LOFD-008002 Dynamic Service-specific Access Control

Prerequisite Features

Dynamic SSAC depends on the feature LBFD-002009 Broadcast of system information

because AC control parameters are broadcast through SIB2 messages.

Dynamic SSAC depends on the feature LBFD-002029 Earthquake and Tsunami Warning

System (ETWS) when the CellDynAcBarAlgoPara. DisasterReferenceInd parameter is set

to ETWS_PN(ETWS_PN) or ETWS_PN_TEST(ETWS_PN_TEST).

Dynamic SSAC depends on the feature LOFD-001092 CMAS Support when the

CellDynAcBarAlgoPara. DisasterReferenceInd parameter is set to CMAS(CMAS).

eRAN

Access Class Control Feature Parameter Description 4 Related Features



27



Mutually Exclusive Features

None

Impacted Features None

eRAN

Access Class Control Feature Parameter Description 4 Related Features



28



5 Network Impact

5.1 LOFD-070207 Intelligent Access Class Control

System Capacity

When the EnodebFlowCtrlPara. DynAcBarPolicyMode parameter is set to

CPULOAD(CPULOAD) and the EnodebFlowCtrlPara.CpuLoadThd parameter is set to a

value less than 80% (for example, 50%), the access of a large number of UEs is barred

although the CPU resource is sufficient. In this case, user experience is affected and the

specified busy hour call attempts (BHCA) may fail to be reached.

Network Performance

The highest frequency for access probability factor adjustment is once every 20 seconds

during intelligent AC control. This has no influence on network performance.

If the RRC connection setup success rate decreases because of flow control on the main

control board or baseband processing units, intelligent AC control prevents some UEs from

accessing the cell. The cell congestion will be relieved, and the RRC connection setup success

rate will also increase. The degree of the increase depends on the cell congestion level, AC

control parameter settings, and the proportion of UEs that support AC control in the network.

If UEs are barred, their access experience will be affected.

5.2 LOFD-008002 Dynamic Service-specific Access Control

System Capacity

The impact of this feature on system capacity is the same as that of LOFD-070207 Intelligent

Access Class Control.

Network Performance

The impact of this feature on network performance is the same as that of LOFD-070207Intelligent Access Class Control.

eRAN

Access Class Control Feature Parameter Description 5 Network Impact



29



6 Engineering Guidelines

6.1 Static AC control

6.1.1 When to Use Static AC Control

Static AC control can be used only when a large number of UEs will simultaneously access

the network.

6.1.2 Required Information

Collect the following information before feature deployment:

l Whether UEs support AC control

Operators can obtain the distribution of various categories of UEs and the capability of

these UEs to support AC control from EPC information. Only UEs that support AC

control defined in 3GPP Release 8 and later can support this feature.

l Whether heavy traffic causes signaling shock to a network when a large number of UEs

in a cell simultaneously access the network

6.1.3 Planning

6.1.3.1 RF Planning N/A

6.1.3.2 Network Planning

N/A

6.1.3.3 Hardware Planning

N/A

6.1.4 Deployment

eRAN

Access Class Control Feature Parameter Description 6 Engineering Guidelines



30



6.1.4.1 Requirements

Other NEs

l Emergency calls, MO data, and MO signaling require that UEs support the AC control

mechanism defined in 3GPP Release 8.

l Multimedia telephony voice and multimedia telephony video require that UEs support

the AC control mechanism defined in 3GPP Release 9.

l CSFB requires that UEs support the AC control mechanism defined in 3GPP Release 10.

License

None

6.1.4.2 Data Preparation

This section describes the data that you need to collect for setting parameters. Required data is

data that you must collect for all scenarios. Collect scenario-specific data when necessary for

a specific feature deployment scenario.

There are three types of data sources:

l Network plan (negotiation not required): parameter values planned and set by the

operator

l Network plan (negotiation required): parameter values planned by the operator and

negotiated with the evolved packet core (EPC) or peer transmission equipment

l User-defined: parameter values set by users

Table 6-1 Parameters that must be set in the CellAlgoSwitch MO to set the AC control switch

Parameter Name

Parameter ID DataSource

Setting Notes

Local cell

ID

CellAlgoSwitc

h. LocalCellId

Network

plan

(negotiation

not required)

This parameter specifies the local ID of a

cell. It uniquely identifies a cell within the

coverage of an eNodeB.

eRAN




31



Parameter Name


Setting Notes

AcBar

algorithms

switch

CellAlgoSwitc

h. AcBarAlgoS

witch

Network

plan

(negotiation

not required)

This parameter specifies an AC control

algorithm.

When this parameter is set to

ACBAR_SWITCH_DYNAMIC(dynamic

configuration), dynamic AC control is

enabled. The

CellAlgoSwitch. AcBarAlgoforDynSwitch

parameter determines whether to enable

intelligent AC control on MO signaling and

MO data or enable dynamic SSAC on

multimedia telephony voice and multimedia

telephony video.


ACBAR_SWITCH_STATIC(static

configuration), static AC control is enabled.

In this situation, the access probability

factors and average access barring duration

are set in the CellAcBar MO.


ACBAR_SWITCH_DISABLE(Disable) ,

AC barring is disabled.

Ac Bar

Algorithm

Switch for

Dynamic

CellAlgoSwitc

h. AcBarAlgof

orDynSwitch

Network

plan

(negotiation

not required)

This parameter determines whether to enable

intelligent AC control on MO signaling and

MO data or SSAC on multimedia telephony

voice and video. This parameter is valid only

when CellAlgoSwitch. AcBarAlgoSwitch is

set to


configuration).

Table 6-2 Parameters that must be set in the CellAcBar MO to AC control information

Parameter

Name

Parameter ID Data

Source

Setting Notes

Local cell ID CellAcBar. Lo

calCellId

Network

plan

(negotiation

not required)


cell. It uniquely identifies a cell within

the coverage of an eNodeB.

AC barring

information

configure

indicator

CellAcBar. Ac

BarringInfoCf

gInd

Network

plan

(negotiation

not required)

This parameter specifies whether to

configure AC control information.

eRAN




32



ParameterName


Setting Notes

Emergency

call barring

state

CellAcBar. Ac

BarringForE

mergency

Network

plan

(negotiation

not required)

This parameter specifies whether UEs of

AC 10 can initiate access for emergency

calls.

If this parameter is set to

BOOLEAN_TRUE(True), UEs of AC

0 to AC 9 or those without IMSIs cannot

initiate access for emergency calls.


BOOLEAN_FALSE(False), such UEs

can initiate access for emergency calls.

UEs of AC N (ranging from 11 to 15)

cannot initiate access for emergency calls

if both AC N and AC 10 are barred.Otherwise, such UEs can initiate access

for emergency calls.

AC barring

for mobile

data

configure

indicator

CellAcBar. Ac

BarringForMo

DataCfgInd

Network

plan

(negotiation

not required)


configure AC control information for

MO data.

Access

probability

factor for

originatingcall

CellAcBar. Ac

BarringFactor

ForCall

Network

plan

(negotiation

not required)

This parameter specifies an access

probability factor for MO data. If the

random number generated by a UE is

less than this access probability factor,the UE can initiate access for MO data.

Otherwise, the UE cannot initiate access

for MO data.

This parameter must be set to P00(0%)

if any of AC 11 to AC 15 is barred for

MO data.

Mean access

barring time

for

originating

call

CellAcBar. Ac

BarTimeForC

all

Network

plan

(negotiation

not required)

This parameter specifies the average

access barring duration for MO data.

AC11 barring

state for

originating

call

CellAcBar. AC

11BarforCall

Network

plan

(negotiation

not required)


AC 11 can initiate access for MO data.

AC12

barring state

for

originating

call

CellAcBar. AC

12BarforCall

Network

plan

(negotiation

not required)



eRAN




33



ParameterName


Setting Notes

AC13

barring state

for

originating

call

CellAcBar. AC

13BarforCall

Network

plan

(negotiation

not required)



AC14

barring state

for

originating

call

CellAcBar. AC

14BarforCall

Network

plan

(negotiation

not required)



AC15

barring state

for originating

call

CellAcBar. AC

15BarforCall

Network

plan

(negotiationnot required)



AC barring

for mobile

signal

configure

indicator

CellAcBar. Ac

BarringForMo

SigCfgInd

Network

plan

(negotiation

not required)



MO signaling.

Access

probability

factor for signaling

CellAcBar. Ac

BarringFactor

ForSig

Network

plan

(negotiationnot required)


probability factor for MO signaling. If

the random number generated by a UE isless than this access probability factor,

the UE can initiate access for MO

signaling.


for MO signaling. This parameter must

be set to P00(0%) if any of AC 11 to AC

15 is barred for MO signaling.

Mean access

barring time

for signaling

CellAcBar. Ac

BarTimeForSi

g

Network

plan

(negotiation

not required)


access barring duration for MO

signaling.

AC11 barring

state for

signaling

CellAcBar. AC

11BarForSig

Network

plan

(negotiation

not required)


AC 11 can initiate access for MO

signaling.

AC12

barring state

for signaling

CellAcBar. AC

12BarForSig

Network

plan

(negotiation

not required)



signaling.

eRAN




34



ParameterName


Setting Notes

AC13

barring state

for signaling

CellAcBar. AC

13BarForSig

Network

plan

(negotiation

not required)



signaling.

AC14

barring state

for signaling

CellAcBar. AC

14BarForSig

Network

plan

(negotiation

not required)



signaling.

AC15

barring state

for signaling

CellAcBar. AC

15BarForSig

Network

plan

(negotiation

not required)



signaling.

AC barring

for MMTEL

voice

configure

indicator

CellAcBar. Ac

BarForMVoice

CfgInd

Network

plan

(negotiation

not required)




Access

probability

factor for

MMTEL

voice

CellAcBar. Ac

BarFactorFor

MVoice

Network

plan

(negotiation

not required)


probability factor for multimedia

telephony voice. If the random number

generated by a UE is less than this access

probability factor, the UE can initiate

access for multimedia telephony voice.Otherwise, the UE cannot initiate access

for multimedia telephony voice.




Mean access

barring time

for MMTEL

voice

CellAcBar. Ac

BarTimeForM

Voice

Network

plan

(negotiation

not required)


access barring duration for multimedia

telephony voice.

AC 11-15 barring state

for MMTEL

voice

CellAcBar. SpecialACBarFo

rMVoice

Network plan

(negotiation

not required)

This parameter specifies whether UEs of AC 11 to AC 15 can initiate access for


AC barring

for MMTEL

video

configure

indicator

CellAcBar. Ac

BarForMVide

oCfgInd

Network

plan

(negotiation

not required)




eRAN




35



ParameterName


Setting Notes

Access

probability

factor for

MMTEL

video

CellAcBar. Ac

BarFactorFor

MVideo

Network

plan

(negotiation

not required)


probability factor for multimedia

telephony video. If the random number

generated by a UE is less than this access

probability factor, the UE can initiate

access for multimedia telephony video.


for multimedia telephony video.




Mean access

barring timefor MMTEL

video

CellAcBar. Ac

BarTimeForM Video

Network

plan(negotiation

not required)


access barring duration for multimediatelephony video.

AC 11-15

barring state

for MMTEL

video

CellAcBar. Sp

ecialACBarFo

rMVideo

Network

plan

(negotiation

not required)


AC 11 to AC 15 can initiate access for


AC barring

for CSFB

configure

indicator

CellAcBar. Ac

BarForCsfbCf

gInd

Network

plan

(negotiation

not required)



CSFB.

Access

probability

factor for

CSFB

CellAcBar. Ac

BarFactorFor

Csfb

Network

plan

(negotiation

not required)


probability factor for CSFB. If the

random number generated by a UE is

less than this access probability factor,

the UE can initiate access for CSFB.


for CSFB.



CSFB.

Mean access barring time

for CSFB

CellAcBar. Ac BarTimeForCs

fb

Network plan

(negotiation

not required)

This parameter specifies the averageaccess barring duration for CSFB.

AC 11-15

barring state

for CSFB

CellAcBar. Sp

ecialACBarFo

rCsfb

Network

plan

(negotiation

not required)


AC 11 to AC 15 can initiate access for

CSFB.

eRAN




36



6.1.4.3 Activation

Using the CME to Perform Batch Configuration for Newly Deployed eNodeBs

Enter the values of the parameters listed in Table 6-3 in a summary data file, which alsocontains other data for the new eNodeBs to be deployed. Then, import the summary data file

into the Configuration Management Express (CME) for batch configuration. For detailed

instructions, see "Creating eNodeBs in Batches" in the initial configuration guide for the

eNodeB, which is available in the eNodeB product documentation.

The summary data file may be a scenario-specific file provided by the CME or a customized

file, depending on the following conditions:

l The MOs in Table 6-3 are contained in a scenario-specific summary data file. In this

situation, set the parameters in the MOs, and then verify and save the file.

l Some MOs in Table 6-3 are not contained in a scenario-specific summary data file. In

this situation, customize a summary data file to include the MOs before you can set the

parameters.

Table 6-3 Static AC control parameters

MO Sheet in theSummary DataFile

Parameter Group Remarks

CellAlgoS

witch

CellAlgoSwitch For details, see 6.1.4.2 Data

Preparation.

Customize this

MO on a

pattern-type

sheet.

CellAcBar CellAcBar For details, see 6.1.4.2 Data

Preparation.

Customize this

MO on a list-

type sheet.

Using the CME to Perform Batch Configuration for Existing eNodeBs

Batch reconfiguration using the CME is the recommended method to activate a feature on

existing eNodeBs. This method reconfigures all data, except neighbor relationships, for

multiple eNodeBs in a single procedure. The procedure is as follows:

Step 1 Customize a summary data file with the MOs and parameters listed in section "Using the

CME to Perform Batch Configuration for Newly Deployed eNodeBs." For online help, press

F1 when a CME window is active, and select Managing the CME > CME Guidelines >

LTE Application Management > eNodeB Related Operations > Customizing a Summary

Data File for Batch eNodeB Configuration.

Step 2 Choose CME > LTE Application > Export Data > Export Base Station Bulk

Configuration Data (U2000 client mode), or choose LTE Application > Export Data >

Export Base Station Bulk Configuration Data (CME client mode), to export the eNodeB

data stored on the CME into the customized summary data file.

Step 3 In the summary data file, set the parameters in the MOs according to the setting notes provided in section "Data Preparation" and close the file.

eRAN




37



Step 4 Choose CME > LTE Application > Import Data > Import Base Station Bulk

Configuration Data (U2000 client mode), or choose LTE Application > Import Data >

Import Base Station Bulk Configuration Data (CME client mode), to import the summary

data file into the CME, and then start the data verification.

Step 5 After data verification is complete, choose CME > Planned Area > Export IncrementalScripts (U2000 client mode), or choose Area Management > Planned Area > Export

Incremental Scripts (CME client mode), to export and activate the incremental scripts. For

detailed operations, see Managing the CME > CME Guidelines > Script File Management

> Exporting Incremental Scripts from a Planned Data Area in the CME online help.

----End

Using the CME to Perform Single Configuration

On the CME, set the parameters listed in the "Data Preparation" section for a single eNodeB.

The procedure is as follows:

Step 1 In the planned data area, click Base Station in the upper left corner of the configuration

window.

Step 2 In area 1 shown in Figure 6-1, select the eNodeB to which the MOs belong.

Figure 6-1 MO search and configuration window

Step 3 On the Search tab page in area 2, enter an MO name, for example, CELL.

Step 4 In area 3, double-click the MO in the Object Name column.

Step 5 All parameters in this MO are displayed in area 4.

Step 6 Choose CME > Planned Area > Export Incremental Scripts (U2000 client mode), or

choose Area Management > Planned Area > Export Incremental Scripts (CME client

mode), to export and activate the incremental scripts.

----End

eRAN




38



Using MML Commands

Step 1 To configure static AC control, perform the following steps: Run the MOD CELLACBAR

command to set AC control parameters. The access type can be emergency calls, MO data,

MO signaling, multimedia telephony voice, multimedia telephony video, or CSFB.

Step 2 Run the MOD CELLALGOSWITCH command to set the AC control mode to static AC

control.

----End

MML Command ExamplesMOD CELLACBAR: LocalCellId=0, AcBarringInfoCfgInd=CFG,

AcBarringForMoDataCfgInd=CFG, AcBarringFactorForCall=P95, AcBarTimeForCall=

ACCESS_BARRING_TIME_S4;

MOD CELLALGOSWITCH: LocalCellId=0, AcBarAlgoSwitch= ACBAR_SWITCH_STATIC;

6.1.4.4 Activation Observation

If Uu tracing results show that delivered SIB2 contains AC control parameters, static AC

control has been activated. The activation observation procedure is as follows:

Step 1 On the U2000 client, choose Monitor > Signaling Trace > Signaling Trace Management.

Step 2 On the navigation tree of the Signaling Trace Management tab page, choose Trace Type >

LTE > Application Layer > Uu Interface Trace. The Uu Interface Trace dialog box is

displayed.

Step 3 Set task information in the displayed Uu Interface Trace dialog box and click Finish. The

Uu interface signaling tracing task is started.

Step 4 Double-click the new task in the task list on the right of the Signaling Trace Management

tab page. The task monitoring tab page is displayed.

Step 5 Run the MOD CELLACBAR command to set AC control parameters in the CellAcBar MO,

for example, for MO signaling. Then, check the monitoring window for SIB2 in

RRC_SYS_INFO. If SIB2 contains the AC control parameters, as shown in Figure 6-2, static

AC control has been activated.

eRAN




39



Figure 6-2 Uu tracing result (SIB2)

----End

6.1.4.5 Reconfiguration

Run the MOD CELLALGOSWITCH command to switch between static AC control,

intelligent AC control, and dynamic SSAC.

6.1.4.6 Deactivation

Using the CME to Perform Batch Configuration

Batch reconfiguration using the CME is the recommended method to deactivate a feature on

eNodeBs. This method reconfigures all data, except neighbor relationships, for multipleeNodeBs in a single procedure. The procedure for feature deactivation is similar to that for

feature activation described in Using the CME to Perform Batch Configuration for

Existing eNodeBs. In the procedure, modify parameters according to Table 6-4.

Table 6-4 Static AC control parameters

MO Sheet in theSummary Data File

ParameterGroup

Setting Notes

CellAlgoSwitch CellAlgoSwitch AcBarAlgo

Switch

ACBAR_SWITCH_DISABL

E(Disable)

eRAN




40




On the CME, set parameters according to Table 6-4. For detailed instructions, see Using the

CME to Perform Single Configuration described for feature activation.

Using MML Commands

Run the MOD CELLALGOSWITCH command to deactivate static AC control.

MML Command ExamplesMOD CELLALGOSWITCH: LocalCellId=0, AcBarAlgoSwitch= ACBAR_SWITCH_DISABLE;

6.1.5 Performance Monitoring

None

6.1.6 Parameter Optimization

When a large number of UEs in a cell simultaneously access the network, the cell may be

congested (for example, the CPU usage exceeds the flow control threshold). In this case,

determine the ACs to be controlled based on the following counters:

l L.RRC.ConnReq.Att.MoData

l L.RRC.ConnReq.Att.MoSig

l L.RRC.ConnReq.Att.Emc

l L.CSFB.PrepAtt

Then, set AC control parameters for the identified ACs. These parameters will be broadcast toUEs.

If the congestion is not relieved, adjust access probability factors such as

CellAcBar. AcBarringFactorForCall to expand the AC control scope, or adjust access

barring durations such as CellAcBar. AcBarTimeForCall to control the access frequencies.

6.1.7 Troubleshooting

None

6.2 Intelligent AC control

6.2.1 When to Use Intelligent AC Control

Intelligent AC control is recommended only when a large number of UEs will simultaneously

access the network, as in the case for special events such as holidays, concerts, and sporting

events or for disasters such as earthquakes and tsunamis. The reason is that intelligent AC

control has an impact on user access experience. If UE access is barred, the perceived access

delay increases.

If intelligent AC control is enabled in a congested cell, new UEs may not be able to access the

network. However, if this impact is acceptable, intelligent AC control can be enabled permanently to relieve cell congestion, even unpredictable congestion.

eRAN




41



6.2.2 Required Information

For details, see 6.1.2 Required Information.

6.2.3 Planning

6.2.3.1 RF Planning

N/A


N/A


N/A

6.2.4 Deployment


Other NEs

UEs must support the AC control mechanism defined in 3GPP Release 8.

License

The operator has purchased and activated the license for the feature listed in the following

table.

Feature ID FeatureName

Model License ControlItem

NE SalesUnit

LOFD-07020

7

Intelligent

Access ClassControl

LT1S00I

ACC00

Intelligent Access

Class Control(FDD)

eNodeB per cell





l For required data, see Table 6-1 and Table 6-2 in 6.1.4.2 Data Preparation.

l For scenario-specific data, see Table 6-5 and Table 6-6.

eRAN




42



Table 6-5 Parameters that must be set in the CellDynAcBarAlgoPara MO to configure

intelligent AC control parameters

ParameterName

Parameter ID Data Source Setting Notes

Local Cell ID CellDynAcBar

AlgoPara. Local

CellId

Network plan

(negotiation

not required)

This parameter specifies the local ID

of a cell. It uniquely identifies a cell

within the coverage of an eNodeB.

Dynamic AC

Barring

Control

Statistic

Period

CellDynAcBar

AlgoPara. Dyn

AcBarStatPerio

d

Network plan

(negotiation

not required)

This parameter specifies a period for

measuring the proportion of cell

congestion duration.

Dynamic AC

Barring

Control

Trigger

Threshold

CellDynAcBar

AlgoPara. Dyn

AcBarTriggerT

hd

Network plan

(negotiation

not required)

This parameter specifies the threshold

for triggering dynamic AC barring in a

cell. This threshold is denoted by the

proportion of time that the cell is in the

congestion state. If the actual cell

congestion duration in a statistic

period (CellDynAcBarAlgo-

Para. DynAcBarStatPeriod ) is greater

than or equal to this threshold, the

condition for triggering dynamic AC

barring is met.

Dynamic AC

Barring

ControlCancel

Threshold

CellDynAcBar

AlgoPara. Dyn

AcBarCancelT

hd

Network plan

(negotiation

not required)

This parameter specifies the threshold

for canceling dynamic AC barring in a

cell. This threshold is denoted by the proportion of time that the cell is in the


congestion duration in a statistic

period (CellDynAcBarAlgo-

Para. DynAcBarStatPeriod ) is less


condition for canceling dynamic AC

control is met.

MO Trigger

Condition

SatisfiedPeriods

CellDynAcBar

AlgoPara. MoTr

iggerCondSatiP eriods

Network plan

(negotiation

not required)

This parameter specifies a threshold

number of consecutive periods during

which the condition for triggeringintelligent AC control on MO data or

MO signaling is met.

Intelligent AC control on MO data or

MO signaling is triggered only when

the number of consecutive periods

during which the condition for

triggering intelligent AC control on

MO data or MO signaling is met

reaches the value of this parameter.

eRAN




43



ParameterName


MO Cancel

Condition

Satisfied

Periods

CellDynAcBar

AlgoPara. MoC

ancelCondSatiP

eriods

Network plan

(negotiation

not required)

This parameter specifies a threshold

number of consecutive periods during

which the condition for canceling

intelligent AC control on MO data or

MO signaling is met.

Intelligent AC control on MO data or

MO signaling is canceled only when

the number of consecutive periods

during which the condition for

canceling intelligent AC control on

MO data or MO signaling is met

reaches the value of this parameter.

Table 6-6 Parameters that must be set in the EnodebFlowCtrlPara MO to configure

congestion decision policies used in intelligent AC control

ParameterName


Dynamic AC

Barring

Policy Mode

EnodebFlowCt

rlPara. DynAcB

arPolicyMode

Network plan

(negotiation

not required)

This parameter specifies the policy of

determining cell congestion for

intelligent AC control or dynamic

SSAC.

l When this parameter is set toFLOWCONTROL(FLOWCONT

ROL), the eNodeB determines that

a cell is congested when the cell is

under flow control.

l When this parameter is set to

CPULOAD(CPULOAD), the

eNodeB determines whether a cell

is congested based on the

configured CPU load threshold. If

the CPU load of a cell's main

control board or baseband processing unit is greater than or

equal to the configured CPU load

threshold, the cell is congested. The

CPU load threshold is specified by

the

EnodebFlowCtrlPara .CpuLoadT

hd parameter.

eRAN




44



ParameterName


CPU Load

Threshold

EnodebFlowCt

rlPara.CpuLoa

dThd

Network plan

(negotiation

not required)

This parameter specifies the CPU load

threshold for determining whether a

cell is congested. This parameter takes

effect only when

EnodebFlowCtrlPara. DynAcBarPoli

cyMode is set to

CPULOAD(CPULOAD). If the CPU

load of a cell's main control board or

baseband processing unit is greater

than or equal to this parameter value,

the cell is congested. If the CPU load

is less than this parameter value, the

cell is not congested.

6.2.4.3 Activation


Enter the values of the parameters listed in Table 6-7 in a summary data file, which also

contains other data for the new eNodeBs to be deployed. Then, import the summary data file

into the CME for batch configuration. For detailed instructions, see "Creating eNodeBs in

Batches" in the initial configur ation guide for the eNodeB, which is available in the eNodeB

product documentation.







parameters.

Table 6-7 Intelligent AC control parameters

MO Sheet in theSummaryData File


CellAcBar CellAcBar For details, see 6.1.4.2 Data

Preparation.

Customize this

MO on a

pattern-type

sheet.

CellAlgoSwitc

h

CellAlgoSwitc

h

For details, see 6.1.4.2 Data

Preparation.

Customize this

MO on a

pattern-type

sheet.

eRAN




45





CellDynAcBar

AlgoPara

CellDynAcBar

AlgoPara


Preparation.

Customize this

MO on a list-

type sheet.

EnodebFlowCt

rlPara

EnodebFlowCt

rlPara


Preparation.

Customize this

MO on a list-

type sheet.


For details, see Using the CME to Perform Batch Configuration for Existing eNodeBs in6.1.4.3 Activation.



For detailed instructions, see Using the CME to Perform Single Configuration in 6.1.4.3

Activation described for feature activation.

Using MML Commands

Step 1 Run the MOD CELLDYNACBARALGOPARA command to set intelligent AC control parameters, including the statistic period, triggering threshold, canceling threshold, number of

periods in which the triggering condition is met, and number of periods in which the

canceling condition is met.

Step 2 Run the MOD CELLACBAR command to set other AC control parameters. The access type

can be emergency calls, MO data, MO signaling, multimedia telephony voice, multimedia

telephony video, or CSFB.

Step 3 Run the MOD CELLALGOSWITCH command to set the AC control mode to intelligent

AC control.

Step 4Run the MOD ENODEBFLOWCTRLPARA command to set the policy of determining

whether a cell is congested to flow control.

----End

MML Command Examples

MOD CELLDYNACBARALGOPARA: LocalCellId=0, DynAcBarTriggerThd =100,

DynAcBarCancelThd =80, DynAcBarStatPeriod=20, MoTriggerCondSatiPeriods=2,

MoCancelCondSatiPeriods=1;

MOD CELLACBAR: LocalCellId=0, AcBarringInfoCfgInd=CFG,

AcBarringForMoDataCfgInd=CFG, AcBarringFactorForCall=P95, AcBarTimeForCall=

ACCESS_BARRING_TIME_S4;

MOD CELLALGOSWITCH: LocalCellId=0, AcBarAlgoSwitch= ACBAR_SWITCH_DYNAMIC,

AcBarAlgoforDynSwitch= DYNAMIC_FOR_MO-1;MOD ENODEBFLOWCTRLPARA: DynAcBarPolicyMode=FLOWCONTROL;

eRAN




46




If the value of any of the following counters is not zero, intelligent AC control has been

activated:

l L.Dyn.ACBar.Trigger.Num: indicates the number of times intelligent AC control istriggered.

l L.Dyn.ACBar.Cancel.Num: indicates the number of times intelligent AC control is

canceled.

NOTE

If the AC control switch is adjusted after intelligent AC control is triggered and before it is cancelled,

the values of the preceding counters will be slightly different from those in scenarios without switch

adjustment. Here is an example for switch adjustment: ACBAR_SWITCH_DYNAMIC(dynamic

configuration) is changed to ACBAR_SWITCH_STATIC(static configuration) or

ACBAR_SWITCH_DISABLE(Disable).


For details, see 6.1.4.5 Reconfiguration.


For details, see 6.1.4.6 Deactivation.


You can use the following methods for performance monitoring:

l Monitor the L.Dyn.ACBar.Trigger.Num and L.Dyn.ACBar.Cancel.Num counters. If

the values of these counters are always zero, the feature has not been triggered. In this

case, adjust the triggering threshold.

l If intelligent AC control has been triggered, monitor the

L.RRC.ConnReq.Msg.disc.FlowCtrl and L.RRC.SetupFail.Rej.FlowCtrl counters. If

the number of RRC connection request discards or rejections due to flow control

decreases, intelligent AC control has taken ef fect.

The decreased number of RRC connection request discards or rejections depends on the

proportion of UEs that support AC control, the access probability factor, and the access

barring duration. If a cell is seriously congested and the proportion of UEs that support AC

control is high, intelligent AC control can achieve high gains.


Monitor the L.Dyn.ACBar.Trigger.Num and L.Dyn.ACBar.Cancel.Num counters. If the

counter values are always 0, this feature has not been triggered. In this case, adjust the

following parameters:

l CellDynAcBarAlgoPara. DynAcBarTriggerThd

l CellDynAcBarAlgoPara. DynAcBarCancelThd

l CellDynAcBarAlgoPara. MoTriggerCondSatiPeriods

l CellDynAcBarAlgoPara. MoCancelCondSatiPeriods

eRAN




47




Fault Description

The values of L.Dyn.ACBar.Trigger.Num and L.Dyn.ACBar.Cancel.Num are always zero.This indicates that intelligent AC control has not been triggered.

The CPU usage (VS.BBUBoard.CPULoad.Mean ) of the main control board or a baseband

processing unit exceeds the flow control threshold (for example, 80%) for a long period (for

example, 15 minutes). In addition, the values of L.RRC.ConnReq.Msg.disc.FlowCtrl and

L.RRC.SetupFail.Rej.FlowCtrl indicate that RRC connection setup requests are discarded

or rejected due to flow control. In this case, it is deduced that a large number of random

access requests or RRC connection setup requests lead to long-term flow control and serious

cell congestion.

Troubleshooting

Step 1 Run the LST CELLALGOSWITCH command to check whether intelligent AC control is

enabled. If it is disabled, turn on the intelligent AC control switch.

Step 2 Run the LST CELLDYNACBARALGOPARA command to check the following parameters

and ensure they are correctly set:

l CellDynAcBarAlgoPara. DynAcBarStatPeriod





Step 3 If intelligent AC control is still not triggered, run the MOD

CELLDYNACBARALGOPARA command to set the following parameters to smaller

values:






Step 4 If intelligent AC control is still not triggered, contact Huawei technical support.

----End

6.3 Dynamic SSAC

6.3.1 When to Use Dynamic SSAC

AC control has an impact on user access experience. If UE access is barred, the perceived

access delay increases. Therefore, AC control is recommended only when a large number of

UEs will simultaneously access the network, as in the case for special events such as holidays,concerts, and sporting events or for disasters such as earthquakes and tsunamis.

eRAN




48



Dynamic SSAC can be used when a large number of UEs will simultaneously initiate

multimedia telephony voice or video, as in the case for disasters such as earthquakes,

tsunamis, and hurricanes.

6.3.2 Required InformationCollect the following information before feature deployment:

l Whether UEs support AC control

Operators can obtain the distribution of various categories of UEs and the capability of

these UEs to support AC control from EPC information. Only UEs that support AC

control defined in 3GPP Release 9 and later can support this feature.

l Whether heavy traffic causes signaling shock to a network when a large number of UEs

in a cell simultaneously access the network

6.3.3 Planning

6.3.3.1 RF Planning

N/A


N/A


N/A

6.3.4 Deployment


Other NEs

UEs must support the AC control mechanism defined in 3GPP Release 9.

License

The operator has purchased and activated the license for the feature listed in the following

table.

Feature ID Feature Name Model LicenseControl Item

NE Sales Unit

LOFD-008

002

Dynamic Service-

specific Access

Control

LT1S0DS

SAC00

Dynamic

Service-specific

Access Control

(FDD)

eNodeB per cell

eRAN




49







l For required data, see Table 6-1 and Table 6-2 in 6.1.4.2 Data Preparation.

l For scenario-specific data, see Table 6-8 and Table 6-9.

Table 6-8 Parameters that must be set in the CellDynAcBarAlgoPara MO to configure

dynamic SSAC parameters

ParameterName


Setting Notes

Local Cell

ID

CellDynAcBa

rAlgoPara. LocalCellId

Network

plan(negotiation

not required)


cell. It uniquely identifies a cell withinthe coverage of an eNodeB.

Dynamic AC

Barring

Control

Statistic

Period

CellDynAcBa

rAlgoPara. Dy

nAcBarStatPe

riod

Network

plan

(negotiation

not required)

This parameter specifies a period for

measuring the proportion of cell

congestion duration.

Dynamic AC

Barring

Control

Trigger

Threshold

CellDynAcBa

rAlgoPara. Dy

nAcBarTrigge

rThd

Network

plan

(negotiation

not required)

This parameter specifies the threshold for

triggering dynamic AC barring in a cell.

This threshold is denoted by the



congestion duration in a statistic period

(CellDynAcBarAlgo-

Para. DynAcBarStatPeriod ) is greater


condition for triggering dynamic AC

barring is met.

Dynamic AC

Barring

Control

Cancel

Threshold

CellDynAcBa

rAlgoPara. Dy

nAcBarCancel

Thd

Network

plan

(negotiation

not required)

This parameter specifies the threshold for

canceling dynamic AC barring in a cell.

This threshold is denoted by the



congestion duration in a statistic period

(CellDynAcBarAlgo-

Para. DynAcBarStatPeriod ) is less than

or equal to this threshold, the condition

for canceling dynamic AC control is met.

Disaster

Reference

Indication

CellDynAcBa

rAlgoPara. Dis

asterReference

Ind

Network

plan

(negotiation

not required)

This parameter specifies the disaster

reference indications used for

determining whether a cell is in the

disaster state. This parameter applies only

to dynamic SSAC.

eRAN




50



ParameterName


Setting Notes

Disaster

Duration

CellDynAcBa

rAlgoPara. Dis

asterDuration

Network

plan

(negotiation

not required)

This parameter specifies the duration that

the cell is in a disaster state. After the cell

enters a disaster state, the duration starts.

When the duration ends, the cell exits the

disaster state. This parameter applies only

to dynamic SSAC.

Ssac Trigger

Condition

Satisfied

Periods

CellDynAcBa

rAlgoPara. Ssa

cTriggerCond

SatiPeriods

Network

plan

(negotiation

not required)

This parameter specifies the number of

consecutive periods during which the

condition for triggering dynamic SSAC is

met.

Dynamic SSAC is triggered only when

the number of consecutive periods during

which the condition for triggeringdynamic SSAC is met reaches the value

of this parameter.

Ssac Cancel

Condition

Satisfied

Periods

CellDynAcBa

rAlgoPara. Ssa

cCancelCondS

atiPeriods

Network

plan

(negotiation

not required)

This parameter specifies the number of

consecutive periods during which the

condition for canceling dynamic SSAC is

met.

Dynamic SSAC is canceled only when

the number of consecutive periods during

which the condition for canceling

dynamic SSAC is met reaches the value

of this parameter.

eRAN




51



Table 6-9 Parameters that must be set in the EnodebFlowCtrlPara MO to configure

congestion decision policies used in dynamic SSAC

ParameterName


Setting Notes

Dynamic AC

Barring

Policy Mode

EnodebFlowC

trlPara. DynA

cBarPolicyMo

de

Network

plan

(negotiation

not required)

This parameter specifies the policy of

determining cell congestion for intelligent

AC control or dynamic SSAC.


FLOWCONTROL(FLOWCONTR

OL), the eNodeB determines that a

cell is congested when the cell is

under flow control.


CPULOAD(CPULOAD), the

eNodeB determines whether a cell iscongested based on the configured

CPU load threshold. If the CPU load

of a cell's main control board or

baseband processing unit is greater

than or equal to the configured CPU

load threshold, the cell is congested.

The CPU load threshold is specified

by the

EnodebFlowCtrlPara.CpuLoadThd

parameter.

CPU LoadThreshold EnodebFlowCtrlPara.CpuL

oadThd

Network plan

(negotiation

not required)

This parameter specifies the CPU loadthreshold for determining whether a cell

is congested. This parameter takes effect

only when

EnodebFlowCtrlPara. DynAcBarPolicy

Mode is set to CPULOAD(CPULOAD).

If the CPU load of a cell's main control

board or baseband processing unit is

greater than or equal to this parameter

value, the cell is congested. If the CPU

load is less than this parameter value, the

cell is not congested.

6.3.4.3 Activation


Enter the values of the parameters listed in Table 6-10 in a summary data file, which also

contains other data for the new eNodeBs to be deployed. Then, import the summary data file

into the CME for batch configuration. For detailed instructions, see "Creating eNodeBs in

Batches" in the initial configuration guide for the eNodeB, which is available in the eNodeB

product documentation.

eRAN




52









parameters.

Table 6-10 Parameters related to dynamic SSAC



CellAcBar CellAcBar For details, see 6.1.4.2

Data Preparation.

Customize this MO on a

pattern-type sheet.

CellAlgoSwitc

h

CellAlgoSwitc

h

For details, see 6.1.4.2

Data Preparation.


pattern-type sheet.

CellDynAcBar

AlgoPara

CellDynAcBar

AlgoPara


Data Preparation.


list-type sheet.

EnodebFlowCt

rlPara

EnodebFlowCt

rlPara


Data Preparation.


list-type sheet.


For details, see Using the CME to Perform Batch Configuration for Existing eNodeBs in

6.1.4.3 Activation.



For detailed instructions, see Using the CME to Perform Single Configuration in 6.1.4.3

Activation described for feature activation.

Using MML Commands

Step 1 Run the MOD CELLDYNACBARALGOPARA command to set dynamic SSAC

parameters, including the statistic period, triggering condition, canceling threshold, number of

periods in which the triggering condition is met, number of periods in which the canceling

condition is met, disaster reference indication, and disaster duration.

Step 2 Run the MOD CELLACBAR command to set other AC control parameters. The access type

can be emergency calls, MO data, MO signaling, multimedia telephony voice, multimedia

telephony video, or CSFB.

Step 3 Run the MOD CELLALGOSWITCH command to set the AC control mode to dynamic

SSAC.

eRAN




53



Step 4 Run the MOD ENODEBFLOWCTRLPARA command to set the policy of determining

whether a cell is congested to flow control.

----End

MML Command ExamplesMOD CELLDYNACBARALGOPARA: LocalCellId=0, DynAcBarTriggerThd =100,

DynAcBarCancelThd =80, DynAcBarStatPeriod=20, SsacTriggerCondSatiPeriods=2,

SsacCancelCondSatiPeriods=1, DisasterReferenceInd=ETWS_PN-1, DisasterDuration=60;

MOD CELLACBAR: LocalCellId=0, AcBarringInfoCfgInd=CFG, AcBarForMVoiceCfgInd=CFG,

AcBarFactorForMVoice=P95, AcBarTimeForMVoice= ACCESS_BARRING_TIME_S4;

MOD CELLALGOSWITCH: LocalCellId=0, AcBarAlgoSwitch= ACBAR_SWITCH_DYNAMIC,

AcBarAlgoforDynSwitch=DYNAMIC_FOR_SSAC-1;

MOD ENODEBFLOWCTRLPARA: DynAcBarPolicyMode=FLOWCONTROL;


If the value of any of the following counters is not zero, dynamic SSAC has been activated:

l L.SSAC.Dyn.ACBar.Trigger.Num: indicates the number of times AC barring for

dynamic SSAC is triggered.

l L.SSAC.Dyn.ACBar.Cancel.Num: Indicates the number of times AC barring for

dynamic SSAC is canceled.

NOTE

If the AC control switch is adjusted after dynamic SSAC is triggered and before it is cancelled, the

L.SSAC.Dyn.ACBar.Trigger.Num and L.SSAC.Dyn.ACBar.Cancel.Num counter values will be

slightly different from those in scenarios without switch adjustment. Here is an example for switch

adjustment: ACBAR_SWITCH_DYNAMIC(dynamic configuration) is changed to

ACBAR_SWITCH_STATIC(static configuration) or ACBAR_SWITCH_DISABLE(Disable).


For details, see 6.1.4.5 Reconfiguration.


For details, see 6.1.4.6 Deactivation.


You can use the following methods for performance monitoring:

l Monitor the L.SSAC.Dyn.ACBar.Trigger.Num and L.SSAC.Dyn.ACBar.Cancel.Num

counters. If the values of these counters are always zero, dynamic SSAC has not been

triggered. In this case, adjust the triggering threshold.

l If dynamic SSAC has been triggered, monitor the L.RRC.ConnReq.Msg.disc.FlowCtrl

and L.RRC.SetupFail.Rej.FlowCtrl counters. If the number of RRC connection request

discards or rejections due to flow control decreases, dynamic SSAC has taken effect.

The decreased number of RRC connection request discards or rejections depends on the

proportion of UEs that support SSAC, the access probability factor, and the access barring

duration. If a cell is seriously congested because a large number of UEs simultaneously

initiate access for multimedia telephony voice and video and the proportion of UEs thatsupport SSAC is high, dynamic SSAC can achieve high gains.

eRAN




54




Monitor the L.SSAC.Dyn.ACBar.Trigger.Num and L.SSAC.Dyn.ACBar.Cancel.Num

counters. If the counter values are always 0, this feature has not been triggered. In this case,

adjust the following parameters:



l CellDynAcBarAlgoPara. SsacTriggerCondSatiPeriods

l CellDynAcBarAlgoPara. SsacCancelCondSatiPeriods


Fault Description

The values of L.SSAC.Dyn.ACBar.Trigger.Num and L.SSAC.Dyn.ACBar.Cancel.Num

are always zero. This indicates that dynamic SSAC has not been triggered.

The CPU usage (VS.BBUBoard.CPULoad.Mean ) of the main control board or a baseband

processing unit exceeds the flow control threshold (for example, 80%) for a long period (for

example, 15 minutes). In addition, the values of L.RRC.ConnReq.Msg.disc.FlowCtrl and

L.RRC.SetupFail.Rej.FlowCtrl indicate that RRC connection setup requests are discarded

or rejected due to flow control. In this case, it is deduced that a large number of random

access requests or RRC connection setup requests lead to long-term flow control and serious

cell congestion.

Troubleshooting Step 1 Run the LST CELLALGOSWITCH command to check whether dynamic SSAC is enabled.

If it is disabled, turn on the dynamic SSAC switch.

Step 2 Run the LST CELLDYNACBARALGOPARA command to check whether the

CellDynAcBarAlgoPara. DisasterReferenceInd and

CellDynAcBarAlgoPara. DisasterDuration parameters are correctly configured. If

CellDynAcBarAlgoPara. DisasterReferenceInd is set, check whether the eNodeB has

received a disaster notification message from the metadata management entity (MME) for the

current cell.

Step 3 Run the LST CELLDYNACBARALGOPARA command to check the following parameters

and ensure they are correctly set:






Step 4 If dynamic SSAC is still not triggered, run the MOD CELLDYNACBARALGOPARA

command to set the following parameters to smaller values:



eRAN




55






Step 5 If dynamic SSAC is still not triggered, contact Huawei technical support.

----End

eRAN




56



7 Parameters

Table 7-1 Parameters

MO Parameter ID

MMLCommand

FeatureID

FeatureName

Description

CellAlg

oSwitch

AcBarA

lgoforD

ynSwitc

h

MOD

CELLA

LGOSW

ITCH

LST

CELLA

LGOSW

ITCH

LOFD-0

08002 /

TDLOF

D-08020

2

LOFD-0

70207 /

TDLOFD-08122

2

Dynami

c

Service

Specific

Access

Control

Intellige

ntAccess

Class

Control

Meaning:

Indicates whether to enable intelligent access barring

algorithms. This parameter controls whether to enable

intelligent access barring on mobile-originated (MO)

signaling, MO data, service specific access control

(SSAC) for multimedia telephony (MMTEL) voice

services, or SSAC for MMTEL video services. This

parameter takes effect only when theAcBarAlgoSwitch parameter in the CellAlgoSwitch

MO is set to ACBAR_SWITCH_DYNAMIC.

DYNAMIC_FOR_MO: Indicates whether to enable

intelligent access barring on UEs running MO

signaling or MO data.

If this switch is on, intelligent access barring applies

to UEs running MO signaling or MO data.

If this switch is off, intelligent access barring does not

apply to UEs running MO signaling or MO data.

DYNAMIC_FOR_SSAC: Indicates whether to enable

intelligent access barring on UEs running MMTEL

voices services or MMTEL video services.

If this switch is on, intelligent access barring applies

to UEs running MMTEL voices services or MMTEL

video services.

If this switch is off, intelligent access barring does not

apply to UEs running MMTEL voices services or

MMTEL video services.

eRAN

Access Class Control Feature Parameter Description 7 Parameters



57



MO Parameter ID

MMLCommand

FeatureID

FeatureName

Description

GUI Value Range:

DYNAMIC_FOR_MO(DYNAMIC_FOR_MO),

DYNAMIC_FOR_SSAC(DYNAMIC_FOR_SSAC)

Unit: None

Actual Value Range: DYNAMIC_FOR_MO,

DYNAMIC_FOR_SSAC

Default Value: DYNAMIC_FOR_MO:On,

DYNAMIC_FOR_SSAC:Off

eRAN




58



MO Parameter ID

MMLCommand

FeatureID

FeatureName

Description

CellDyn

AcBarA

lgoPara

Disaster

Referen

ceInd

MOD

CELLD

YNACB

ARALG

OPARA

LST

CELLD

YNACB

ARALG

OPARA

LOFD-0

08002 /

TDLOF

D-00800

2

Dynami

c

Service

Specific

Access

Control

Meaning:

Indicates the disaster reference indications used for

determining whether a cell is in the disaster state. If all

switches included in this parameter are off, the

disaster state of the cell does not need to be

determined.

ETWS_PN: Indicates whether Primary notifications

(PNs) in the earthquake and tsunami warning system

(ETWS) is used in the disaster state determination.

The PNs for ETWS do not include PNs used for

ETWS tests.

If this switch is on, PNs in ETWS are used in thedisaster state determination.

If this switch is off, PNs in ETWS are not used in the

disaster state determination.

ETWS_PN_TEST: Indicates whether PNs for ETWS

tests are used in the disaster state determination.

If this switch is on, PNs in ETWS tests are used in the


If this switch is off, PNs in ETWS tests are not used in

the disaster state determination.

CMAS: Indicates whether commercial mobile alert

system (CMAS) warning notifications are used in the


If this switch is on, CMAS warning notifications are

used in the disaster state determination.

If this switch is off, CMAS warning notifications are

not used in the disaster state determination.

GUI Value Range: ETWS_PN(ETWS PN),

ETWS_PN_TEST(ETWS PN FOR TEST),

CMAS(CMAS)

Unit: None

Actual Value Range: ETWS_PN, ETWS_PN_TEST,

CMAS

Default Value: ETWS_PN:On, ETWS_PN_TEST:Off,

CMAS:Off

eRAN




59



MO Parameter ID

MMLCommand

FeatureID

FeatureName

Description

CellDyn

AcBarA

lgoPara

Disaster

Duration

MOD

CELLD

YNACB

ARALG

OPARA

LST

CELLD

YNACB

ARALG

OPARA

LOFD-0

08002 /

TDLOF

D-00800

2

Dynami

c

Service

Specific

Access

Control

Meaning: Indicates the duration that the cell is in the

disaster state. The cell is out of the disaster state after

the duration specified by this parameter ends.

GUI Value Range: 1~10080

Unit: min

Actual Value Range: 1~10080

Default Value: 60

CellDyn

AcBarAlgoPara

SsacTrig

gerCondSatiPeri

ods

MOD

CELLDYNACB

ARALG

OPARA

LST

CELLD

YNACB

ARALG

OPARA

LOFD-0

08002 /TDLOF

D-00800

2

Dynami

cService

Specific

Access

Control

Meaning: Indicates the number of periods for

triggering intelligent access barring on specificservices. If related triggering conditions are met in

consecutive periods specified by this parameter,

intelligent access barring on specific services is

triggered.


Unit: None


Default Value: 2

CellDyn

AcBarAlgoPara

SsacCan

celCondSatiPeri

ods

MOD

CELLDYNACB

ARALG

OPARA

LST

CELLD

YNACB

ARALG

OPARA

LOFD-0

08002 /TDLOF

D-00800

2

Dynami

cService

Specific

Access

Control

Meaning: Indicates the number of periods for

canceling intelligent access barring on specificservices. If related cancellation conditions are met in

consecutive periods specified by this parameter,

intelligent access barring on specific services is

canceled.


Unit: None


Default Value: 1

CellDyn

AcBarAlgoPara

MoTrig

gerCondSatiPeri

ods

MOD

CELLDYNACB

ARALG

OPARA

LST

CELLD

YNACB

ARALG

OPARA

LOFD-0

70207 /TDLOF

D-07020

7

Intellige

ntAccess

Class

Control

Meaning: Indicates the number of consecutive periods

for triggering intelligent access class control onmobile-originated (MO) calls or signaling if related

triggering conditions are met.


Unit: None


Default Value: 2

eRAN




60



MO Parameter ID

MMLCommand

FeatureID

FeatureName

Description

CellDyn

AcBarA

lgoPara

MoCanc

elCondS

atiPerio

ds

MOD

CELLD

YNACB

ARALG

OPARA

LST

CELLD

YNACB

ARALG

OPARA

LOFD-0

70207 /

TDLOF

D-07020

7

Intellige

nt

Access

Class

Control

Meaning: Indicates the number of consecutive periods

for canceling intelligent access class control on

mobile-originated (MO) calls or signaling if related

cancellation conditions are met.


Unit: None


Default Value: 1

eNodeB

FlowCtr lPara

DynAcB

arPolicyMode

MOD

ENODEBFLOW

CTRLP

ARA

LST

ENODE

BFLOW

CTRLP

ARA

LOFD-0

70207 /TDLOF

D-07020

7

LOFD-0

08002 /

TDLOF

D-00800

2

Intellige

ntAccess

Class

Control

Dynami

c

Service

Specific

Access

Control(

SSAC)

Meaning:

Indicates the policy for determining whether cells arecongested in intelligent access control or service-

based dynamic access control.


FLOWCONTROL(FLOWCONTROL), cell

congestion is determined based on the flow control

state.

If this parameter is set to CPULOAD(CPULOAD),

cell congestion is determined based on the configured

CPU load threshold. If the CPU load of a main control

board or baseband processing unit serving the cells is

greater than or equal to the configured CPU load

threshold, the cells are congested. The CPU load

threshold is specified by the CpuLoadThd parameter.

GUI Value Range:

FLOWCONTROL(FLOWCONTROL),

CPULOAD(CPULOAD)

Unit: None

Actual Value Range: FLOWCONTROL, CPULOAD

Default Value: FLOWCONTROL(FLOWCONTROL)

eNodeBFlowCtr

lPara

CpuLoadThd MODENODE

BFLOW

CTRLP

ARA

LST

ENODE

BFLOW

CTRLP

ARA

LOFD-070207 /

TDLOF

D-07020

7

LOFD-0

08002 /

TDLOF

D-00800

2

Intelligent

Access

Class

Control

Dynami

c

Service

Specific

Access

Control(

SSAC)

Meaning: Indicates the CPU load threshold of a board.If the CPU load of a main control board or baseband

processing unit serving the cells is greater than or

equal to this parameter value, the cells are congested.

If the CPU load is less than this parameter value, the

cells are not congested. This parameter takes effect

only when the DynAcBarPolicyMode parameter is set

to CPULOAD(CPULOAD).


Unit: %


Default Value: 80

eRAN




61



MO Parameter ID

MMLCommand

FeatureID

FeatureName

Description

CellAcB

ar

AcBarri

ngInfoC

fgInd

MOD

CELLA

CBAR

LST

CELLA

CBAR

LBFD-0

02009 /

TDLBF

D-00200

9

Broadca

st of

system

informat

ion

Meaning: Indicates whether to configure the access

barring information.

GUI Value Range: NOT_CFG(Not configure),

CFG(Configure)

Unit: None

Actual Value Range: NOT_CFG, CFG

Default Value: NOT_CFG(Not configure)

CellAlg

oSwitch

AcBarA

lgoSwitc

h

MOD

CELLA

LGOSW

ITCHLST

CELLA

LGOSW

ITCH

LBFD-0

02009 /

TDLBF

D-002009

LOFD-0

700206 /

TLOFD-

0700206

Broadca

st of

system

information

Dynami

c AC

Barring

Meaning: Indicates the switch for the access barring

algorithm. If this parameter is set to

ACBAR_SWITCH_DYNAMIC, intelligent access

barring is enabled. In this situation, the access probability factors for mobile-originated data and

mobile-originated signaling are dynamically adjusted

based on the cell load. If this parameter is set to

ACBAR_SWITCH_STATIC, static access barring is

enabled. In this situation, the access probability

factors and average access barring durations are

configured in the access barring information. If this

parameter is set to ACBAR_SWITCH_DISABLE,

access barring is disabled.

GUI Value Range:


configuration), ACBAR_SWITCH_STATIC(staticconfiguration),

ACBAR_SWITCH_DISABLE(Disable)

Unit: None

Actual Value Range: ACBAR_SWITCH_DYNAMIC,

ACBAR_SWITCH_STATIC,

ACBAR_SWITCH_DISABLE

Default Value: ACBAR_SWITCH_STATIC(static

configuration)

eRAN




62



MO Parameter ID

MMLCommand

FeatureID

FeatureName

Description

CellAcB

ar

AcBarri

ngForE

mergenc

y

MOD

CELLA

CBAR

LST

CELLA

CBAR

LBFD-0

02028 /

TDLBF

D-00202

8

Emerge

ncy Call

Meaning:

Indicates the emergency call barring status of access

class 10, indicating whether UEs of access class 10

can initiate emergency calls.

If this parameter is set to BOOLEAN_TRUE, UEs of

access classes 0 to 9 or those without IMSIs cannot

initiate emergency calls. If this parameter is set to

BOOLEAN_FALSE, UEs of access classes 0 to 9 and

those without IMSIs can initiate emergency calls.

A UE in access classes 11 to 15 cannot initiate

emergency calls only when its access class and access

class 10 are both barred. If its access class or accessclass 10 is not barred, emergency calls initiated by the

UE are granted access.

GUI Value Range: BOOLEAN_FALSE(False),

BOOLEAN_TRUE(True)

Unit: None

Actual Value Range: BOOLEAN_FALSE,

BOOLEAN_TRUE

Default Value: BOOLEAN_FALSE(False)

CellAcB

ar

AcBarri

ngForM

oDataCf

gInd

MOD

CELLA

CBAR

LST

CELLA

CBAR

LBFD-0

02009 /

TDLBF

D-00200

9

Broadca

st of

system

informat

ion


barring information for mobile-originated calls.


CFG(Configure)

Unit: None



CellAcB

ar

AcBarri

ngForM

oSigCfg

Ind

MOD

CELLA

CBAR

LSTCELLA

CBAR

LBFD-0

02009 /

TDLBF

D-002009

Broadca

st of

system

information


barring information for signaling.


CFG(Configure)Unit: None



eRAN




63



MO Parameter ID

MMLCommand

FeatureID

FeatureName

Description

CellAcB

ar

AcBarF

orMVoic

eCfgInd

MOD

CELLA

CBAR

LST

CELLA

CBAR

LBFD-0

02009 /

TDLBF

D-00200

9

Broadca

st of

system

informat

ion


barring information for multimedia telephony

(MMTEL) voice services.


CFG(Configure)

Unit: None



CellAcB

ar

AcBarF

orMVid

eoCfgInd

MOD

CELLA

CBAR LST

CELLA

CBAR

LBFD-0

02009 /

TDLBFD-00200

9

Broadca

st of

systeminformat

ion


barring information for multimedia telephony

(MMTEL) video services.GUI Value Range: NOT_CFG(Not configure),

CFG(Configure)

Unit: None



CellAcB

ar

AcBarF

orCsfbC

fgInd

MOD

CELLA

CBAR

LST

CELLACBAR

LBFD-0

02009 /

TDLBF

D-00200

9

Broadca

st of

system

informat

ion


barring information for CS fallback (CSFB) services.


CFG(Configure)

Unit: None



eRAN




64



MO Parameter ID

MMLCommand

FeatureID

FeatureName

Description

CellAcB

ar

AcBarTi

meForC

all

MOD

CELLA

CBAR

LST

CELLA

CBAR

LBFD-0

02009 /

TDLBF

D-00200

9

Broadca

st of

system

informat

ion

Meaning: Indicates the average access barring

duration for mobile-originated calls.

GUI Value Range:

ACCESS_BARRING_TIME_S4(4s),







ACCESS_BARRING_TIME_S512(512s)

Unit: s

Actual Value Range:

ACCESS_BARRING_TIME_S4,







ACCESS_BARRING_TIME_S512

Default Value: ACCESS_BARRING_TIME_S4(4s)

CellAcBar

AcBarringFactor

ForCall

MODCELLA

CBAR

LST

CELLA

CBAR

LBFD-002009 /

TDLBF

D-00200

9

Broadcast of

system

informat

ion

Meaning: Indicates the access probability factor for mobile-originated calls. A mobile-originated call is

granted access if the random number generated by the

UE is less than this access probability factor;

otherwise, the access request is rejected. According to

3GPP TS 36.331, if any of the parameters

AC11BarforCall, AC12BarforCall, AC13BarforCall,

AC14BarforCall, and AC15BarforCall is set to

BOOLEAN_TRUE, the eNodeB sends UEs P00 as

the access probability factor for mobile-originated

calls in the system information block type 2 (SIB2),

regardless of the actual setting of the

AcBarringFactorForCall parameter.

GUI Value Range: P00(0%), P05(5%), P10(10%),

P15(15%), P20(20%), P25(25%), P30(30%),

P40(40%), P50(50%), P60(60%), P70(70%),

P75(75%), P80(80%), P85(85%), P90(90%),

P95(95%)

Unit: %

Actual Value Range: P00, P05, P10, P15, P20, P25,

P30, P40, P50, P60, P70, P75, P80, P85, P90, P95

Default Value: P95(95%)

eRAN




65



MO Parameter ID

MMLCommand

FeatureID

FeatureName

Description

CellAcB

ar

AC11Ba

rforCall

MOD

CELLA

CBAR

LST

CELLA

CBAR

LBFD-0

02009 /

TDLBF

D-00200

9

Broadca

st of

system

informat

ion

Meaning:

Indicates the mobile-originated call barring status of

access class 11, indicating whether UEs of access

class 11 can initiate mobile-originated calls.


access class 11 cannot initiate mobile-originated calls.

If this parameter is set to BOOLEAN_FALSE, UEs of

access class 11 can initiate mobile-originated calls.


BOOLEAN_TRUE(True)

Unit: None


BOOLEAN_TRUE


CellAcB

ar

AC12Ba

rforCall

MOD

CELLA

CBAR

LST

CELLA

CBAR

LBFD-0

02009 /

TDLBF

D-00200

9

Broadca

st of

system

informat

ion

Meaning:






If this parameter is set to BOOLEAN_FALSE, UEs of access class 12 can initiate mobile-originated calls.


BOOLEAN_TRUE(True)

Unit: None


BOOLEAN_TRUE


eRAN




66



MO Parameter ID

MMLCommand

FeatureID

FeatureName

Description

CellAcB

ar

AC13Ba

rforCall

MOD

CELLA

CBAR

LST

CELLA

CBAR

LBFD-0

02009 /

TDLBF

D-00200

9

Broadca

st of

system

informat

ion

Meaning:









BOOLEAN_TRUE(True)

Unit: None


BOOLEAN_TRUE


CellAcB

ar

AC14Ba

rforCall

MOD

CELLA

CBAR

LST

CELLA

CBAR

LBFD-0

02009 /

TDLBF

D-00200

9

Broadca

st of

system

informat

ion

Meaning:






If this parameter is set to BOOLEAN_FALSE, UEs of access class 14 can initiate mobile-originated calls.


BOOLEAN_TRUE(True)

Unit: None


BOOLEAN_TRUE


eRAN




67



MO Parameter ID

MMLCommand

FeatureID

FeatureName

Description

CellAcB

ar

AC15Ba

rforCall

MOD

CELLA

CBAR

LST

CELLA

CBAR

LBFD-0

02009 /

TDLBF

D-00200

9

Broadca

st of

system

informat

ion

Meaning:









BOOLEAN_TRUE(True)

Unit: None


BOOLEAN_TRUE


CellAcB

ar

AcBarTi

meForSi

g

MOD

CELLA

CBAR

LST

CELLA

CBAR

LBFD-0

02009 /

TDLBF

D-00200

9

Broadca

st of

system

informat

ion

Meaning: Indicates the average access barring

duration for signaling.

GUI Value Range:





ACCESS_BARRING_TIME_S64(64s),ACCESS_BARRING_TIME_S128(128s),



Unit: s

Actual Value Range:






ACCESS_BARRING_TIME_S128,ACCESS_BARRING_TIME_S256,



eRAN




68



MO Parameter ID

MMLCommand

FeatureID

FeatureName

Description

CellAcB

ar

AcBarri

ngFactor

ForSig

MOD

CELLA

CBAR

LST

CELLA

CBAR

LBFD-0

02009 /

TDLBF

D-00200

9

Broadca

st of

system

informat

ion

Meaning: Indicates the access probability factor for

signaling. Signaling from a UE is granted access if the

random number generated by the UE is less than this

access probability factor; otherwise, the access request

is rejected. According to 3GPP TS 36.331, if any of

the parameters AC11BarForSig, AC12BarForSig,

AC13BarForSig, AC14BarForSig, and

AC15BarForSig is set to BOOLEAN_TRUE, the

eNodeB sends UEs P00 as the access probability

factor for signaling in the system information block

type 2 (SIB2), regardless of the actual setting of the

AcBarringFactorForSig parameter.

GUI Value Range: P00(0%), P05(5%), P10(10%),P15(15%), P20(20%), P25(25%), P30(30%),

P40(40%), P50(50%), P60(60%), P70(70%),

P75(75%), P80(80%), P85(85%), P90(90%),

P95(95%)

Unit: %

Actual Value Range: P00, P05, P10, P15, P20, P25,

P30, P40, P50, P60, P70, P75, P80, P85, P90, P95


CellAcB

ar

AC11Ba

rForSig

MOD

CELLACBAR

LST

CELLA

CBAR

LBFD-0

02009 /TDLBF

D-00200

9

Broadca

st of system

informat

ion

Meaning:

Indicates the signaling barring status of access class11, indicating whether UEs of access class 11 can

initiate signaling access.


access class 11 cannot initiate signaling access. If this

parameter is set to BOOLEAN_FALSE, UEs of access

class 11 can initiate signaling access.


BOOLEAN_TRUE(True)

Unit: None

Actual Value Range: BOOLEAN_FALSE,BOOLEAN_TRUE


eRAN




69



MO Parameter ID

MMLCommand

FeatureID

FeatureName

Description

CellAcB

ar

AC12Ba

rForSig

MOD

CELLA

CBAR

LST

CELLA

CBAR

LBFD-0

02009 /

TDLBF

D-00200

9

Broadca

st of

system

informat

ion

Meaning:

Indicates the signaling barring status of access class

12, indicating whether UEs of access class 12 can







BOOLEAN_TRUE(True)

Unit: None


BOOLEAN_TRUE


CellAcB

ar

AC13Ba

rForSig

MOD

CELLA

CBAR

LST

CELLA

CBAR

LBFD-0

02009 /

TDLBF

D-00200

9

Broadca

st of

system

informat

ion

Meaning:






parameter is set to BOOLEAN_FALSE, UEs of accessclass 13 can initiate signaling access.


BOOLEAN_TRUE(True)

Unit: None


BOOLEAN_TRUE


eRAN




70



MO Parameter ID

MMLCommand

FeatureID

FeatureName

Description

CellAcB

ar

AC14Ba

rForSig

MOD

CELLA

CBAR

LST

CELLA

CBAR

LBFD-0

02009 /

TDLBF

D-00200

9

Broadca

st of

system

informat

ion

Meaning:









BOOLEAN_TRUE(True)

Unit: None


BOOLEAN_TRUE


CellAcB

ar

AC15Ba

rForSig

MOD

CELLA

CBAR

LST

CELLA

CBAR

LBFD-0

02009 /

TDLBF

D-00200

9

Broadca

st of

system

informat

ion

Meaning:






parameter is set to BOOLEAN_FALSE, UEs of accessclass 15 can initiate signaling access.


BOOLEAN_TRUE(True)

Unit: None


BOOLEAN_TRUE


eRAN




71



MO Parameter ID

MMLCommand

FeatureID

FeatureName

Description

CellAcB

ar

AcBarTi

meForM

Voice

MOD

CELLA

CBAR

LST

CELLA

CBAR

LBFD-0

02009 /

TDLBF

D-00200

9

Broadca

st of

system

informat

ion

Meaning: Indicates the average access barring time of

multimedia telephony (MMTEL) voice services.

GUI Value Range:









Unit: s

Actual Value Range:










CellAcBar

AcBarFactorFor

MVoice

MODCELLA

CBAR

LST

CELLA

CBAR

LBFD-002009 /

TDLBF

D-00200

9

Broadcast of

system

informat

ion

Meaning: Indicates the access probability factor for multimedia telephony (MMTEL) voice services. An

MMTEL voice service is granted access if the random

number generated by the UE is less than this access

probability factor; otherwise, the access request is

barred.


P15(15%), P20(20%), P25(25%), P30(30%),

P40(40%), P50(50%), P60(60%), P70(70%),

P75(75%), P80(80%), P85(85%), P90(90%),

P95(95%)

Unit: %Actual Value Range: P00, P05, P10, P15, P20, P25,

P30, P40, P50, P60, P70, P75, P80, P85, P90, P95


eRAN




72



MO Parameter ID

MMLCommand

FeatureID

FeatureName

Description

CellAcB

ar

Special

ACBarF

orMVoic

e

MOD

CELLA

CBAR

LST

CELLA

CBAR

LBFD-0

02009 /

TDLBF

D-00200

9

Broadca

st of

system

informat

ion

Meaning:

Indicates whether multimedia telephony (MMTEL)

voice services initiated by UEs of AC 11 to AC 15 are

granted access.

AC11BARSTATE: If this option is selected, the

MMTEL voice services initiated by UEs of AC 11 in

idle mode are barred.




AC13BARSTATE: If this option is selected, theMMTEL voice services initiated by UEs of AC 13 in








GUI Value Range:

AC11BARSTATE(AC11BARSTATE),AC12BARSTATE(AC12BARSTATE),

AC13BARSTATE(AC13BARSTATE),


AC15BARSTATE(AC15BARSTATE)

Unit: None

Actual Value Range: AC11BARSTATE,

AC12BARSTATE, AC13BARSTATE,

AC14BARSTATE, AC15BARSTATE

Default Value: AC11BARSTATE:Permit,

AC12BARSTATE:Permit, AC13BARSTATE:Permit,

AC14BARSTATE:Permit, AC15BARSTATE:Permit

eRAN




73



MO Parameter ID

MMLCommand

FeatureID

FeatureName

Description

CellAcB

ar

AcBarTi

meForM

Video

MOD

CELLA

CBAR

LST

CELLA

CBAR

LBFD-0

02009 /

TDLBF

D-00200

9

Broadca

st of

system

informat

ion


multimedia telephony (MMTEL) video services.

GUI Value Range:









Unit: s

Actual Value Range:










CellAcBar

AcBarFactorFor

MVideo

MODCELLA

CBAR

LST

CELLA

CBAR

LBFD-002009 /

TDLBF

D-00200

9

Broadcast of

system

informat

ion

Meaning: Indicates the access probability factor for multimedia telephony (MMTEL) video services. An

MMTEL video service is granted access if the random

number generated by the UE is less than this access

probability factor; otherwise, the access request is

barred.


P15(15%), P20(20%), P25(25%), P30(30%),

P40(40%), P50(50%), P60(60%), P70(70%),

P75(75%), P80(80%), P85(85%), P90(90%),

P95(95%)

Unit: %Actual Value Range: P00, P05, P10, P15, P20, P25,

P30, P40, P50, P60, P70, P75, P80, P85, P90, P95


eRAN




74



MO Parameter ID

MMLCommand

FeatureID

FeatureName

Description

CellAcB

ar

Special

ACBarF

orMVid

eo

MOD

CELLA

CBAR

LST

CELLA

CBAR

LBFD-0

02009 /

TDLBF

D-00200

9

Broadca

st of

system

informat

ion

Meaning:

Indicates whether multimedia telephony (MMTEL)

video services initiated by UEs of AC 11 to AC 15 are

granted access.


MMTEL video services initiated by UEs of AC 11 in





AC13BARSTATE: If this option is selected, theMMTEL video services initiated by UEs of AC 13 in








GUI Value Range:





Unit: None







eRAN




75



MO Parameter ID

MMLCommand

FeatureID

FeatureName

Description

CellAcB

ar

AcBarTi

meForC

sfb

MOD

CELLA

CBAR

LST

CELLA

CBAR

LBFD-0

02009 /

TDLBF

D-00200

9

Broadca

st of

system

informat

ion


CS fallback (CSFB) services.

GUI Value Range:









Unit: s

Actual Value Range:










CellAcBar

AcBarFactorFor

Csfb

MODCELLA

CBAR

LST

CELLA

CBAR

LBFD-002009 /

TDLBF

D-00200

9

Broadcast of

system

informat

ion

Meaning: Indicates the access probability factor for CS fallback (CSFB) services. If the random number

generated by a UE is less than the parameter value, the

eNodeB accepts the CSFB service access request;

otherwise, the eNodeB rejects the access request.


P15(15%), P20(20%), P25(25%), P30(30%),

P40(40%), P50(50%), P60(60%), P70(70%),

P75(75%), P80(80%), P85(85%), P90(90%),

P95(95%)

Unit: %

Actual Value Range: P00, P05, P10, P15, P20, P25,P30, P40, P50, P60, P70, P75, P80, P85, P90, P95


eRAN




76



MO Parameter ID

MMLCommand

FeatureID

FeatureName

Description

CellAcB

ar

Special

ACBarF

orCsfb

MOD

CELLA

CBAR

LST

CELLA

CBAR

LBFD-0

02009 /

TDLBF

D-00200

9

Broadca

st of

system

informat

ion

Meaning:

Indicates whether CS fallback (CSFB) services

initiated by UEs of AC 11 to AC 15 are granted

access.

AC11BARSTATE: If this option is selected, the CSFB

services initiated by UEs of AC 11 in idle mode are

barred.



barred.

AC13BARSTATE: If this option is selected, the CSFBservices initiated by UEs of AC 13 in idle mode are

barred.



barred.



barred.

GUI Value Range:





Unit: None







CellDyn

AcBarA

lgoPara

DynAcB

arStatPe

riod

MOD

CELLD

YNACB

ARALG

OPARA

LST

CELLD

YNACB

ARALG

OPARA

LOFD-0

70207 /

TDLOF

D-07020

7

Intellige

nt

Access

Class

Control

Meaning: Indicates the statistic period of dynamic

access class (AC) barring in a cell, during which the

proportion of time that the cell is in the congestion

state is exported.


Unit: s


Default Value: 20

eRAN




77



MO Parameter ID

MMLCommand

FeatureID

FeatureName

Description

CellDyn

AcBarA

lgoPara

DynAcB

arTrigge

rThd

MOD

CELLD

YNACB

ARALG

OPARA

LST

CELLD

YNACB

ARALG

OPARA

LOFD-0

70207 /

TDLOF

D-07020

7

Intellige

nt

Access

Class

Control

Meaning: Indicates the threshold for triggering

dynamic access class (AC) barring in the cell. This

threshold specifies the proportion of time that the cell

is in the congestion state. If the proportion of time that

the cell is in the congestion state is greater than or

equal to this parameter value within a statistic period

(specified by the DynAcBarStatPeriod parameter), the

conditions for triggering dynamic AC barring are met.


Unit: %


Default Value: 100

CellDyn

AcBarA

lgoPara

DynAcB

arCancel

Thd

MOD

CELLD

YNACB

ARALG

OPARA

LST

CELLD

YNACB

ARALG

OPARA

LOFD-0

70207 /

TDLOF

D-07020

7

Intellige

nt

Access

Class

Control

Meaning: Indicates the threshold for canceling

dynamic access class (AC) barring in the cell. This

threshold specifies the proportion of time that the cell

is in the congestion state. If the proportion of time that

the cell is in the congestion state is less than or equal

to this parameter value within a statistic period

(specified by the DynAcBarStatPeriod parameter), the

conditions for canceling dynamic AC barring are met.


Unit: %


Default Value: 80

CellAlg

oSwitch

LocalCe

llId

DSP

CELLU

LCAMC

CLUST

ER

LST

CELLA

LGOSW

ITCH

MOD

CELLA

LGOSW

ITCH

None None Meaning: Indicates the local ID of the cell. It uniquely

identifies a cell within a BS.


Unit: None


Default Value: None

eRAN




78



MO Parameter ID

MMLCommand

FeatureID

FeatureName

Description

CellAcB

ar

LocalCe

llId

LST

CELLA

CBAR

MOD

CELLA

CBAR

None None Meaning: Indicates the local ID of the cell. It uniquely

identifies a cell within a BS.


Unit: None


Default Value: None

CellDyn

AcBarA

lgoPara

LocalCe

llId

LST

CELLD

YNACB

ARALG

OPARAMOD

CELLD

YNACB

ARALG

OPARA

None None Meaning: Indicates the local cell ID. It uniquely

identifies a cell within an eNodeB.


Unit: None


Default Value: None

eRAN




79



8 Counters

Table 8-1 Counters

Counter ID Counter Name CounterDescription

Feature ID Feature Name

1526728217 L.RRC.ConnReq.At

t.Emc

Number of RRC

connection setup

attempts with a

cause value of

emergency

Multi-mode: None

GSM: None

UMTS: None

LTE:

LBFD-002007

TDLBFD-002007

RRC Connection

Management

RRC Connection

Management

1526728220 L.RRC.ConnReq.Att.MoSig

Number of RRCconnection setup

attempts with a

cause value of mo-

Signalling

Multi-mode: NoneGSM: None

UMTS: None

LTE:

LBFD-002007

TDLBFD-002007

RRC ConnectionManagement

RRC Connection

Management

1526728221 L.RRC.ConnReq.At

t.MoData

Number of RRC

connection setup

attempts with a

cause value of mo-

Data

Multi-mode: None

GSM: None

UMTS: None

LTE:LBFD-002007

TDLBFD-002007

RRC Connection

Management

RRC Connection

Management

eRAN

Access Class Control Feature Parameter Description 8 Counters



80





1526728321 L.CSFB.PrepAtt Number of CSFB

indicators received

by the eNodeB

Multi-mode: None

GSM: NoneUMTS: None

LTE:

LOFD-001033

TDLOFD-001033

LOFD-001034

TDLOFD-001034

LOFD-001035

TDLOFD-001035

CS Fallback to

UTRAN

CS Fallback to

UTRAN

CS Fallback to

GERAN

CS Fallback to

GERAN

CS Fallback to

CDMA2000 1xRTT

CS Fallback to

CDMA2000 1xRTT

1526728489 L.RRC.ConnReq.M

sg.disc.FlowCtrl

Number of times

the RRC

Connection Request

message is

discarded due to

flow control

Multi-mode: None

GSM: None

UMTS: None

LTE:

LBFD-002007

TDLBFD-002007

RRC Connection

Management

RRC Connection

Management

1526728490 L.RRC.SetupFail.R

ej.FlowCtrl

Number of times

the eNodeB sends

an RRC Connection

Reject message tothe UE due to flow

control

Multi-mode: None

GSM: None

UMTS: NoneLTE:

LBFD-002007

TDLBFD-002007

RRC Connection

Management

RRC Connection

Management

1526729499 L.Dyn.ACBar.Trigg

er.Num

Number of times

that dynamic AC

Barring is triggered

Multi-mode: None

GSM: None

UMTS: None

LTE:

LOFD-070207

TDLOFD-080202

Intelligent Access

Class Control

Intelligent Access

Class Control

1526729500 L.Dyn.ACBar.Canc

el.Num

Number of times

that dynamic AC

Barring is cancelled

Multi-mode: None

GSM: None

UMTS: None

LTE:

LOFD-070207

TDLOFD-080202

Intelligent Access

Class Control

Intelligent Access

Class Control

eRAN




81





1526729501 L.Dyn.ACBar.Adju

st.Num

Number of times

that parameters

related to dynamic

AC Barring are

adjusted

Multi-mode: None

GSM: NoneUMTS: None

LTE:

LOFD-070207

TDLOFD-080202

Intelligent Access

Class Control

Intelligent Access

Class Control

1526729502 L.Dyn.ACBar.Contr

ol.Dur

Control duration of

dynamic AC

Barring

Multi-mode: None

GSM: None

UMTS: None

LTE:

LOFD-070207TDLOFD-080202

Intelligent Access

Class Control

Intelligent Access

Class Control

1526736656 L.SSAC.Dyn.ACBa

r.Trigger.Num

Number of times

dynamic SSAC is

triggered

Multi-mode: None

GSM: None

UMTS: None

LTE:

LBFD-002009

TDLBFD-002009

LOFD-008002

TDLOFD-081222LOFD-070207

Broadcast of system

information

Broadcast of system

information

Dynamic Service-

Specific Access

Control

Dynamic Service-

specific AcccessControl

Intelligent Access

Class Control


r.Adjust.Num

Number of times

parameters related

to dynamic SSAC

are adjusted

Multi-mode: None

GSM: None

UMTS: None

LTE:

LBFD-002009

TDLBFD-002009

LOFD-008002

TDLOFD-081222

LOFD-070207

Broadcast of system

information

Broadcast of system

information

Dynamic Service-

Specific Access

ControlDynamic Service-

specific Acccess

Control

Intelligent Access

Class Control

eRAN




82






r.Cancel.Num

Number of times

dynamic SSAC is

canceled

Multi-mode: None

GSM: NoneUMTS: None

LTE:

LBFD-002009

TDLBFD-002009

LOFD-008002

TDLOFD-081222

LOFD-070207

Broadcast of system

information

Broadcast of system

information

Dynamic Service-

Specific Access

Control

Dynamic Service-

specific Acccess

Control

Intelligent Access

Class Control


r.Control.Dur

Duration of

dynamic SSAC

Multi-mode: None

GSM: None

UMTS: None

LTE:

LBFD-002009

TDLBFD-002009

LOFD-008002

TDLOFD-081222

LOFD-070207

Broadcast of system

information

Broadcast of system

information

Dynamic Service-

Specific Access

Control

Dynamic Service-

specific Acccess

Control

Intelligent AccessClass Control

1593835633 VS.BBUBoard.CP

ULoad.Mean

Average Board

CPU Usage

Multi-mode:

MRFD-210302

GSM:

GBFD-111202

UMTS: None

LTE:

LBFD-004009

TDLBFD-004009

Performance

Management

O&M of BTS

Real-time

Monitoring of

System Running

Information

Real-time

Monitoring of

System Running

Information

eRAN




83



9 Glossary

For the acronyms, abbreviations, terms, and definitions, see Glossary.

eRAN

Access Class Control Feature Parameter Description 9 Glossary



84



10 Reference Documents

1. 3GPP TS 36.331, " Radio Resource Control (RRC)"

2. 3GPP TS 24.301, "Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS);

Stage 3"

3. 3GPP TS 22.011, "Service accessibility"

4. 3GPP TS 23.122, "Non-Access-Stratum (NAS) functions related to Mobile Station (MS) in

idle mode"

eRAN

Access Class Control Feature Parameter Description 10 Reference Documents