Download - Call Admission Control(RAN13.0_03)

8/10/2019 Call Admission Control(RAN13.0_03)

1/74

Call Admission ControlRAN13.0

Feature Parameter Description

Issue 03

Date 2012-11-30

HUAWEI TECHNOLOGIES CO., LTD.


2/74

Copyright Huawei Technologies Co., Ltd. 2012. 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 the purchase 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 orrepresentations 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 the 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]
http://www.huawei.com/http://www.huawei.com/mailto:[email protected]:[email protected]:[email protected]://www.huawei.com/


3/74

WCDMA RAN

Call Admission Control Contents

Issue 03 (2012-11-30) Huawei Proprietary and Confidential

Copyright Huawei Technologies Co., Ltd

i

Contents

1 Introduction ................................................................................................................................ 1-1

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

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

1.3 Change History .............................................................................................................................. 1-1

2 Overview of Call Admission Control ................................................................................... 2-1

3 Technical Description .............................................................................................................. 3-1

3.1 Overview ....................................................................................................................................... 3-1

3.1.1 Admission Resource and Basic Procedure .......................................................................... 3-1

3.1.2 HSDPA Admission Control .................................................................................................... 3-2

3.1.3 HSUPA Admission Control .................................................................................................... 3-2

3.2 CAC Based on Code Resources ................................................................................................... 3-3

3.3 CAC Based on Power Resources ................................................................................................. 3-4

3.3.1 Overview ............................................................................................................................... 3-4

3.3.2 Power-based Admission Control on RRC Connection Setup Requests .............................. 3-5

3.3.3 Power-based Admission Algorithm 1 for RAB Setup ............................................................ 3-7

3.3.4 Power-based Admission Algorithm 2 for RAB Setup .......................................................... 3-14

3.3.5 Power-based Admission Algorithm 3 for RAB Setup .......................................................... 3-17

3.4 CAC Based on NodeB Credit Resources ................................................................................... 3-18

3.4.1 NodeB Credit Resources .................................................................................................... 3-18

3.4.2 NodeB Credit Resource-based Admission Decisions ........................................................ 3-18

3.5 CAC Based on Iub Resources .................................................................................................... 3-19

3.6 CAC Based on the Number of HSPA Users ................................................................................ 3-20

3.6.1 CAC for HSDPA Users ....................................................................................................... 3-20

3.6.2 CAC for HSUPA Users ....................................................................................................... 3-20

3.7 Common Channel Admission ...................................................................................................... 3-20

3.7.1 CAC on Traditional Common Channels ............................................................................. 3-20

3.7.2 CAC on the E-FACH or E-RACH ........................................................................................ 3-21

4 Parameters.................................................................................................................................. 4-1

5 Counters ...................................................................................................................................... 5-1

6 Glossary ...................................................................................................................................... 6-1

7 Reference Documents ............................................................................................................. 7-1


4/74

WCDMA RAN

Call Admission Control 1 Introduction



1-1

1 Introduction

1.1 Scope

This document describes the call admission control feature WRFD-020101 Admission Control. Itdescribes how services are granted the network access and provides the parameters associated withthis feature.

1.2 Intended Audience

This document is intended for:

Personnel who are familiar with WCDMA basics

Personnel who need to understand Call Admission Control (CAC)

Personnel who work with Huawei products

1.3 Change HistoryThis section provides information about the changes in different document versions.

There are two types of changes, which are defined as follows:

Feature change: refers to a change in the CAC feature of a specific product version.

Editorial change: refers to a change in wording or the addition of information that was not described inthe earlier version.

Document Issues

The document issues are as follows:

03 (2012-11-30)

02 (2011-12-30)

01 (2011-04-30)

Draft B (2011-03-30)

Draft A (2010-12-30)

03 (2012-11-30)

This is the third commercial release of RAN13.0.

Compared with issue 02 (2011-12-30) of RAN13.0, this issue incorporates the changes described in the

following table:

Change Type Change Description Parameter Change

Feature change None. None.

Editorial change Added section3.7 "Common Channel Admission." None.

02 (2011-12-30)

This is the document for the second commercial release of RAN13.0.


5/74

WCDMA RAN

Call Admission Control 1 Introduction



1-2

Compared with 01 (2011-04-30) of RAN13.0, this issue incorporates the following changes:

Change Type Change Description Parameter Change

Feature change The admission for RRC connections is optimized. For

detailed information, see the following section: 3.2 "CAC Based on Code Resources"

3.3.2 "Power-based Admission Control on RRCConnection Setup Requests"

3.4.2 "NodeB Credit Resource-based AdmissionDecisions"

None.

The admission for AMR services is optimized toincrease the access success rate of AMR services. Fordetailed information, search the phrase "to increase theaccess success rate of AMR services."

None.

Editorial change The detailed information about call admission control isprovided.

None.

01 (2011-04-30)

This is the document for the first commercial release of RAN13.0.

Compared with Draft B (2011-03-30) of RAN13.0, this issue has no change.

Draft B (2011-03-30)

This is the second draft of the document for RAN13.0.Compared with Draft A (2010-12-30) of RAN13.0, this issue optimizes the description.

Draft A (2010-12-30)

This is the first draft of the document for RAN13.0.

Compared with issue 04 (2010-12-20) of RAN12.0, this issue optimizes the description.


6/74

WCDMA RAN

Call Admission Control 2 Overview of Call Admission Control



2-1

2 Overview of Call Admission Control

Call Admission Control (CAC) is used to determine whether the system resources in a cell are sufficientto accept a resource request. If the system resources are sufficient, the resource request is accepted;

otherwise, the resource request is rejected.

A radio link sends a resource request to the CAC functional module when additional resources arerequired, in cases such as radio resource control (RRC) connection setup, new service setup, change ofexisting services, soft handover, and cell change. Upon receiving a resource request, the CAC functionalmodule determines whether the request can be accepted by measuring the cell load and the requestedresources. For details about measuring the cell load, see theLoad Control Feature ParameterDescription.

The admission decision performed using CAC is based on the following resources: code resources,power resources, NodeB credit resources, and Iub resources. In the case of an HSPA resource request,the admission decision is also based on the number of HSPA users. The admission succeeds only whenthe resources on which CAC is based are available.

With CAC, an overloaded cell can accept resource requests for an RRC connection setup only in thecase of emergency calls, detachments, or registrations. This is because the priority of such requests isvery high. This helps maintain system stability when cells are overloaded. In addition, admitting orrejecting users over FACH or enhanced FACH channels (HS-DSCH) in an overloaded cell can bespecified by setting FACH_UU_ADCTRLof theNBMCacAlgoSwitchparameter.
http://localhost/var/www/apps/conversion/tmp/scratch_10/Load%20Control.htmhttp://localhost/var/www/apps/conversion/tmp/scratch_10/Load%20Control.htmhttp://localhost/var/www/apps/conversion/tmp/scratch_10/Load%20Control.htmhttp://localhost/var/www/apps/conversion/tmp/scratch_10/Load%20Control.htmhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/scratch_10/Load%20Control.htmhttp://localhost/var/www/apps/conversion/tmp/scratch_10/Load%20Control.htm


7/74

WCDMA RAN

Call Admission Control 3 Technical Description



3-1

3 Technical Description

3.1 Overview

3.1.1 Admission Resource and Basic Procedure

A radio link sends a resource request to the CAC functional module when additional resources arerequired. On receipt of the resource request, the CAC functional module performs the admissiondecision based on the following resources:

Available cell code resources

Available cell power resources

NodeB credit resources, which are used to measure the channel demodulation capability of NodeBs

Available Iub transmission bandwidth

Number of HSDPA users (only for HSDPA services)

Number of HSUPA users (only for HSUPA services)

A call can be admitted only when all of these resources are available.

Code resource-based and Iub resource-based admission control are mandatory and cannot be disabled.For HSDPA/HSUPA services, admission control based on the number of HSUPA/HSDPA users is alsomandatory. Other admission control policies are enabled or disabled by running the MODUCELLALGOSWITCHor SET UCACALGOSWITCH command.

Figure 3-1shows the basic procedure for a resource-based admission decision.


8/74

WCDMA RAN




3-2

Figure 3-1 Basic procedure for a resource-based admission decision

3.1.2 HSDPA Admission Control

HSDPA admission control (WRFD-01061003 HSDPA Admission Control) enables the HSDPA servicealong with other R99 services to access the network by using the remaining power resources and otherresources. Admission control based on the number of HSDPA users is also considered.

Iub resource admission for HSDPA users is also performed during admission control to grant HSDPA

services and other R99 services the access to resources to ensure a certain QoS.

HSDPA admission control is described in this document, along with R99 admission control.

3.1.3 HSUPA Admission Control

HSUPA admission control (WRFD-01061202 HSUPA Admission Control) enables HSUPA services alongwith other R99 services to access the network by using the remaining uplink cell load and otherresources. Admission based on the number of HSUPA users is also considered.

Iub resource admission and NodeB credit resources for HSUPA users are also performed duringadmission control to grant HSUPA service and other R99 services the access to resources to ensure acertain QoS.


9/74

WCDMA RAN




3-3

HSUPA admission control is described in this document, along with R99 admission control.

3.2 CAC Based on Code Resources

Code resource-based admission is mandatory when a non-HSDPA service attempts to access the

network.

The reserved code resources are shared by all HSDPA services and therefore code resource-based admission control forHSDPA services is not required. For details about code allocation for HSDPA services, see theHSDPA Feature ParameterDescription.

In code resource-based admission, the admission criteria vary with the service request.

RRC Connection Setup Requests

For an RRC connection setup request, code resource-based admission is implemented as follows:

When RSVDBIT11under theRsvdPara1parameter in the ADD UCELLALGOSWITCHcommand is

set to 0, code resource-based admission succeeds if the remaining code resources are sufficient forsetting up an RRC connection.

When RSVDBIT11under theRsvdPara1parameter in the ADD UCELLALGOSWITCHcommand isset to 1, the RNC implements code resource-based admission based on the cause carried in the RRCconnection setup request:

If the cause is "Emergency Call" or "Detach", code resource-based admission succeeds if theremaining code resources are sufficient.

For any other cause, the RNC must ensure that the remaining codes (the remaining minimum SF ofthe current cell) do not exceed the reserved minimum spreading factor (SF) for an RRC connectionupon admitting an RRC connection setup request. The reserved minimum SF is specified byRSVDBIT12under theRsvdPara1parameter in the ADD UCELLALGOSWITCHcommand.

a. If RSVDBIT12under theRsvdPara1parameter is set to 0, the reserved minimum SF is SF128.

b. If RSVDBIT12under theRsvdPara1parameter is set to 1, the reserved minimum SF is SF32.

Handover Service Requests

For handover service requests, code resource-based admission succeeds if the remaining coderesources are sufficient for the service to be admitted.

PS Service/CS Service (Non-AMR Service) Requests

For PS services/CS service (non-AMR service) requests, the RNC must ensure that the remaining codes(the remaining minimum SF of the current cell) upon admitting a new service do not exceed thethreshold which is specified by theDlHoCeCodeResvSfparameter.

AMR Service Requests

For AMR service requests,

When RSVDBIT11under theRsvdPara1parameter in the ADD UCELLALGOSWITCHcommand isset to 0, the RNC must ensure that the remaining codes (the remaining minimum SF of the current cell)upon admitting a new service do not exceed the threshold specified by theDlHoCeCodeResvSfparameter.

When RSVDBIT11under theRsvdPara1parameter in the ADD UCELLALGOSWITCHcommand isset to 1, code resource-based admission succeeds if the remaining code resources are sufficient forthe service to be admitted.
http://localhost/var/www/apps/conversion/tmp/scratch_10/HSDPA.htmhttp://localhost/var/www/apps/conversion/tmp/scratch_10/HSDPA.htmhttp://localhost/var/www/apps/conversion/tmp/scratch_10/HSDPA.htmhttp://localhost/var/www/apps/conversion/tmp/scratch_10/HSDPA.htmhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlhocecoderesvsf.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlhocecoderesvsf.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlhocecoderesvsf.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlhocecoderesvsf.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlhocecoderesvsf.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlhocecoderesvsf.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlhocecoderesvsf.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlhocecoderesvsf.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/scratch_10/HSDPA.htmhttp://localhost/var/www/apps/conversion/tmp/scratch_10/HSDPA.htm


10/74

WCDMA RAN




3-4

3.3 CAC Based on Power Resources

3.3.1 Overview

Power-based admission is used for RRC connection setup requests and radio access bearer (RAB)admission. The power-based admission algorithm is enabled or disabled by theNBMUlCacAlgoSelSwitch/NBMDlCacAlgoSelSwitchparameter.

To enable power-based admission control for HSDPA or HSUPA services, select HSDPA_UU_ADCTRLorHSUPA_UU_ADCTRLunder theNBMCacAlgoSwitch parameter. This switch does not work when the uplink is overHSUPA channels and the downlink is over HSDPA channels.

CAC based on power resources is performed by using one of the following three algorithms:

Algorithm 1 (ALGORITHM_FIRST): admission control based on the expected load increase causedby a new service

Depending on the current cell power load, the RNC determines whether the cell load will exceed thethreshold upon admitting the new service. If the cell load exceeds the threshold, the RNC rejects theaccess request. Otherwise, the RNC admits the service.

Algorithm 2 (ALGORITHM_SECOND): admission control based on the equivalent number of users(ENU)

Depending on the current ENU load and the access request, the RNC determines whether the ENUwill exceed the threshold upon admitting the new request. If the ENU exceeds the threshold, the RNCrejects the access request. Otherwise, the RNC admits the service.

Algorithm 3 (ALGORITHM_THIRD): admission control without considering load increase caused by anew service

This algorithm assumes that the load increase caused by the new service is 0. Based on the current

cell power load, the RNC determines whether the cell load will exceed the threshold. If the cell loadexceeds the threshold, the RNC rejects the access request. Otherwise, the RNC admits the service.

Figure 3-2shows the basic procedure for a power-based admission decision.
http://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmulcacalgoselswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmdlcacalgoselswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmdlcacalgoselswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmdlcacalgoselswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmdlcacalgoselswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmulcacalgoselswitch.html


11/74

WCDMA RAN




3-5

Figure 3-2 Basic procedure for a power-based admission decision

The basic principles for a power-based admission decision are as follows:

For an intra-frequency handover request, only a downlink admission decision is required. For a non-intra-frequency handover request, both uplink and downlink decisions are required.

If there is a rate downsizing request, the RNC accepts it directly. For a rate upsizing request, bothuplink and downlink admission control are required.

3.3.2 Power-based Admission Control on RRC Connection SetupRequests

The RNC performs loose or strict admission control on RRC connection setup requests.

If RSVDBIT8, RSVDBIT9, and RSVDBIT10under theRsvdPara1parameter in the ADDUCELLALGOSWITCHcommand are all set to 0 on the RNC, the RNC performs loose admission control

on RRC connection setup requests. Otherwise, the RNC performs strict admission control on RRCconnection setup requests.

Admission control is performed on RRC connection setup requests the same way as it is performed onRAB setup requests, except that the admission thresholds are different. This section only describes theadmission thresholds for RRC connection setup requests in loose and strict admission control. Fordetails about admission control for RAB setup, see section3.3.3 "Power-based Admission Algorithm 1for RAB Setup."

If load increase is considered when the RNC performs admission control on an RRC connection setup request, the RNCcalculates the load increase based on the signaling radio bearer (SRB) rate of the RRC connection setup request. TheSRB rate of an RRC connection setup request is set by running the SET URRCESTCAUSEcommand.
http://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.html


12/74

WCDMA RAN




3-6

Loose Admission Control

If an RRC connection setup request comes from emergency calls, detachments, or registrations, theRRC connection is set up directly.

If an RRC connection setup request comes from other services, admission control is performed asfollows:

When UL_UU_OLCor DL_UU_OLCunder theNBMLdcAlgoSwi tchparameter is set to 1,

If the cell is overloaded, the RRC connection setup request is rejected.

If the cell is not overloaded, the uplink or downlink OLC triggering threshold (UlOlcTrigThdorDlOlcTrigThd)is used for admission control.

When UL_UU_OLCor DL_UU_OLCis set to 0, the uplink or downlink OLC triggering threshold(UlOlcTrigThdorDlOlcTrigThd)is used for admission control.

For details about the state of an overloaded cell and overload control (OLC), see theLoad ControlFeature Parameter Description.

Strict Admission Control

If an RRC connection setup request comes from emergency calls or detachments, the RRC connectionis set up directly.

If an RRC connection setup request comes from other services, the RNC determines the admissionthreshold based on one of the following request causes:

RRC connection setup requests of real-time services

RRC connection setup requests of non-real-time services

RRC connection setup requests of other services (excluding real-time services, non-real-time services,emergency calls, and detachments)

The RNC determines the admission threshold using the following formulas:

Admission threshold for RRC of real-time services = Admission threshold offset for RRC of real-timeservices +UlNonCtr lThdForAMR(for the uplink) orDlConvAMRThd(for the downlink)

Admission threshold for RRC of non-real-time services = Admission threshold offset for RRC ofnon-real-time services +UlNonCtr lThdForOther(for the uplink) orDlOtherThd(for the downlink)

Admission threshold for RRC of other services = Admission threshold offset for RRC of other services+UlOlcTrigThd(for the uplink) orDlOlcTrigThd(for the downlink)

The offsets in these three formulas vary with the settings of RSVDBIT8, RSVDBIT9, and RSVDBIT10under theRsvdPara1parameter. SeeTable 3-1.

Table 3-1Admission threshold offsets for three types of RRC connection setup request in strict admissioncontrol

Settings of RSVDBIT8,RSVDBIT9, andRSVDBIT10

AdmissionThreshold Offsetfor RRC ofReal-Time Service

AdmissionThreshold Offset forRRC ofNon-Real-TimeService

Admission ThresholdOffset for RRC of OtherService

(0, 0, 1) 5% 5% 0%

(0, 1, 0) 0% 0% 0%

(0, 1, 1) -5% -5% -5%
http://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_ulolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_ulolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_ulolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_dlolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_dlolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_ulolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_ulolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_ulolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_dlolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_dlolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_dlolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/scratch_10/Load%20Control.htmhttp://localhost/var/www/apps/conversion/tmp/scratch_10/Load%20Control.htmhttp://localhost/var/www/apps/conversion/tmp/scratch_10/Load%20Control.htmhttp://localhost/var/www/apps/conversion/tmp/scratch_10/Load%20Control.htmhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforamr.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforamr.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforamr.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlconvamrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlconvamrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlconvamrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforother.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforother.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforother.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlotherthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlotherthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlotherthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_ulolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_ulolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_ulolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_dlolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_dlolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_dlolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_dlolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_ulolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlotherthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforother.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlconvamrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforamr.htmlhttp://localhost/var/www/apps/conversion/tmp/scratch_10/Load%20Control.htmhttp://localhost/var/www/apps/conversion/tmp/scratch_10/Load%20Control.htmhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_dlolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_ulolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_dlolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_ulolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.html


13/74

WCDMA RAN




3-7

Settings of RSVDBIT8,RSVDBIT9, andRSVDBIT10

AdmissionThreshold Offsetfor RRC ofReal-Time Service

AdmissionThreshold Offset forRRC ofNon-Real-Time

Service

Admission ThresholdOffset for RRC of OtherService

(1, 0, 0) 5% 5% -15%

(1, 0, 1) 0% 0% -15%

(1, 1, 0) -5% -5% -20%

(1, 1, 1) 15% 10% -10%

3.3.3 Power-based Admission Algorithm 1 for RAB Setup

There are two types of power-based admission decisions based on algorithm 1: uplink and downlink.

The RNC performs admission control on services based on cell load. The measurement quantitiesrelevant to cell load are processed and reported by the load measurement module of the RNC. Fordetails about how measurement quantities relevant to cell load are measured and reported, see thesection of load measurements in theLoad Control Feature Parameter Description.

Uplink Power-based Admission Decisions for R99 Cells Based on Algorithm 1

In an R99 cell, uplink power-based admission decisions are made according to the RTWP-based totaluplink load. The RTWP-based total uplink load is calculated in real time by the load measurementmodule of the RNC. It is represented by UL,R99-Totaland calculated using the following formula:

UL,R99-Total= 1 - PN/RTWP + UL,CCH

Where

PNis the received uplink background noise. It is set by theBackgroundNoiseparameter. If theauto-adaptive background noise update algorithm is enabled, PNis updated in real time. For detailsabout the auto-adaptive background noise update algorithm, see theLoad Control Feature ParameterDescription.

RTWP is the received total wideband power in the uplink. It is measured by the NodeB and reported tothe RNC periodically.

UL,CCHis the reserved load on the uplink common channels. It is set by theUlCCHLoadFactorparameter.

Upon receiving a service access request, the RNC makes the uplink power-based admission decisionfor an R99 service. The procedure is as follows:

1. The RNC calculates the uplink load increase (UL) based on the initial admission rate of the service.For details about the initial admission rate, see theLoad Control Feature Parameter Description.

2. If the sum of the RTWP-based total uplink load (UL,R99-Total) and the load increase caused by the newservice (UL) is lower than or equal to the corresponding admission threshold(UlNonCtr lThdForAMR,UlNonCtr lThdForNonAMR,UlNonCtr lThdForOther,orUlNonCtr lThdForHo), the RNC admits the service. Otherwise, the RNC performs the next step.

When RSVDBIT11under theRsvdPara1parameter in the ADD UCELLALGOSWITCHcommand is set to 1, the RNCuses the following admission threshold for AMR service setup, reconfiguration, or handover requests to increase theaccess success rate of AMR services:
http://localhost/var/www/apps/conversion/tmp/scratch_10/Load%20Control.htmhttp://localhost/var/www/apps/conversion/tmp/scratch_10/Load%20Control.htmhttp://localhost/var/www/apps/conversion/tmp/scratch_10/Load%20Control.htmhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_backgroundnoise.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_backgroundnoise.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_backgroundnoise.htmlhttp://localhost/var/www/apps/conversion/tmp/scratch_10/Load%20Control.htmhttp://localhost/var/www/apps/conversion/tmp/scratch_10/Load%20Control.htmhttp://localhost/var/www/apps/conversion/tmp/scratch_10/Load%20Control.htmhttp://localhost/var/www/apps/conversion/tmp/scratch_10/Load%20Control.htmhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulcchloadfactor.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulcchloadfactor.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulcchloadfactor.htmlhttp://localhost/var/www/apps/conversion/tmp/scratch_10/Load%20Control.htmhttp://localhost/var/www/apps/conversion/tmp/scratch_10/Load%20Control.htmhttp://localhost/var/www/apps/conversion/tmp/scratch_10/Load%20Control.htmhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforamr.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforamr.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforamr.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforamr.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdfornonamr.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdfornonamr.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdfornonamr.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforother.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforother.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforother.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforho.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforho.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforho.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforother.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdfornonamr.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforamr.htmlhttp://localhost/var/www/apps/conversion/tmp/scratch_10/Load%20Control.htmhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulcchloadfactor.htmlhttp://localhost/var/www/apps/conversion/tmp/scratch_10/Load%20Control.htmhttp://localhost/var/www/apps/conversion/tmp/scratch_10/Load%20Control.htmhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_backgroundnoise.htmlhttp://localhost/var/www/apps/conversion/tmp/scratch_10/Load%20Control.htm


14/74

WCDMA RAN




3-8

When the OLC algorithm switch (UL_UU_OLCunder theNBMLdcAlgoSwi tchparameter) is turned on, the uplink OLCtriggering threshold (UlOlcTrigThd)is used as the admission threshold.

When the OLC algorithm switch (UL_UU_OLC under theNBMLdcAlgoSwi tchparameter) is turned off, the admissionthreshold is 100%.

3. The RNC checks whether the control RTWP anti-interference function switch(RTWP_RESIST_DISTURB under theNBMCacAlgoSwitchparameter) is turned on. If it is turnedon, the RNC checks whether the total uplink load of ENU on the cell is lower thanCellUlEquNumCapacity.If it is lower thanCellUlEquNumCapacity,the RNC admits the service.Otherwise, the RNC rejects the access request. For details about the total uplink load of ENU on thecell, see section3.3.4 "Power-based Admission Algorithm 2 for RAB Setup."

Uplink Power-based Admission Decisions for HSPA Cells Based on Algorithm1

In an HSPA cell, uplink power-based admission decisions are made based on the following load

measurements:

The RTWP-based total uplink load, which is calculated in real time by the load measurement moduleof the RNC. It is represented by UL,HSUPA-Totaland calculated using the following formula:

UL,HSUPA-Total= 1 - PN/RTWP + UL,CCH+ HS-DPCCH

Where HS-DPCCHis the reserved load for the uplink HS-DPCCH. It is set by the

UlHsDpcchRsvdFactorparameter. The other variables are defined the same way as for an R99 cell

in "Uplink Power-based Admission Decisions for R99 Cells Based on Algorithm 1."

The uncontrollable uplink load, which is the load factor for the receive power of a cell excluding the

receive power used for scheduling services. It is represented by UL,NonCtrland calculated using the

following formula:

UL,NonCtrl= UL,HSUPA-Total- UL,Ctrl

Where UL,Ctrlis the controllable uplink load and equals the received scheduled E-DCH power share(RSEPS). RSEPS is the ratio of the receive power of all scheduled users to RTWP in the current cell.

RSEPS is measured by the NodeB and periodically reported to the RNC.

The total uplink load for preferential admission of R99 services, which is represented by UL,R99Prefer-Total.

When the guaranteed bit rate (GBR) for HSUPA services is too high, the RTWP-based total uplink load

may also be too high, and therefore R99 service admission is difficult. In this case, UL,R99Prefer-Total

ensures that R99 services are preferentially admitted. It is calculated using the following formula:

UL,R99Prefer-Total= UL,NonCtrl+ ThdHSUPAMaxGBP+ UL,CCH+ HS-DPCCH

Where ThdHSUPAMaxGBPis the maximum guaranteed load threshold for HSUPA services when the RNC

makes an admission decision on an R99 service. It is set by theHsupaMaxGBPThdparameter.

If the periodic measurement switch of the total receive power used for scheduling services on the E-DCH is turned off

(HSUPA_EDCH_RSEPS_MEASunder theNBMCacAlgoSwitch parameter is set to ), the RNC performs admission

control for the cell based on ENU. For details about ENU-based admission control, see section3.3.4 "Power-basedAdmission Algorithm 2 for RAB Setup."

Upon receiving a service access request, the RNC performs the uplink power-based admission decision.The procedure is as follows:

1. The RNC calculates the uplink load increase (UL) based on the initial admission rate of the service.

2. The RNC determines whether to admit the service. If service admission succeeds, the RNC admitsthe service. If service admission fails, the RNC performs the next step. Note that the admissioncriteria vary with the bearer type in an HSPA cell, which is described in follow-up sections.
http://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_ulolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_ulolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_ulolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_cellulequnumcapacity.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_cellulequnumcapacity.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_cellulequnumcapacity.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_cellulequnumcapacity.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_cellulequnumcapacity.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulhsdpcchrsvdfactor.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulhsdpcchrsvdfactor.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulhsdpcchrsvdfactor.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_hsupamaxgbpthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_hsupamaxgbpthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_hsupamaxgbpthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_hsupamaxgbpthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulhsdpcchrsvdfactor.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_cellulequnumcapacity.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_cellulequnumcapacity.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_ulolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.html


15/74

WCDMA RAN




3-9

3. The RNC checks whether the control RTWP anti-interference function switch(RTWP_RESIST_DISTURB under theNBMCacAlgoSwitchparameter) is turned on. If it is turnedon, the RNC checks whether the total uplink load of ENU on the cell is lower thanCellUlEquNumCapacity.If it is lower thanCellUlEquNumCapacity,the RNC admits the service.Otherwise, the RNC rejects the access request. For details about the total uplink load of ENU on the

cell, see section3.3.4 "Power-based Admission Algorithm 2 for RAB Setup."

The admission criteria for different bearer types in an HSPA cell are as follows:

For the DCH RAB

If the bearer type is the DCH RAB, a service is admitted only when the following criteria are both met:

The sum of the uncontrollable uplink load (UL,NonCtrl) and the load increase caused by the new service

(UL) is lower than or equal to the corresponding admission threshold (UlNonCtr lThdForAMR,

UlNonCtr lThdForNonAMR,UlNonCtr lThdForOther,orUlNonCtr lThdForHo).

The sum of the RTWP-based total uplink load (UL,HSUPA-Total) and the load increase caused by the new

service (UL), or the sum of the total uplink load for preferential admission of R99 services

(UL,R99Prefer-Total) and the load increase caused by the new service (UL), is lower than or equal to

UlCellTotalThd.




For the HSUPA RAB

If the bearer type is the HSUPA RAB, the CAC algorithm combines the PBR-based admission decisionwith the load-based admission decision. The RNC admits an HSUPA service if either PBR-basedadmission or load-based admission succeeds.

IMS signaling services carried on HSUPA RABs are admitted directly.

PBR-based admission decisions

The uplink provided bit rate (PBR) is the effective uplink throughput on all UEs corresponding to ascheduling priority indicator (SPI) successfully received by the NodeB. PBR is reported by the NodeBto the RNC periodically.

The RNC performs PBR-based admission control only when the HSUPA PBR measurement switch isturned on (HSUPA_PBR_MEASunder theNBMCacAlgoSwitchparameter is set to 1). If the sum ofPBRs of some UEs is larger than the sum of their GBRs multiplied by a certain factor, the RNCdecides that the QoS requirements of the cell are met. In this case, the RNC can admit new services.PBR-based service admission succeeds if any of the following criteria are met:
http://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_cellulequnumcapacity.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_cellulequnumcapacity.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_cellulequnumcapacity.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_cellulequnumcapacity.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_cellulequnumcapacity.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforamr.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforamr.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforamr.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdfornonamr.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdfornonamr.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforother.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforother.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforother.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforho.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforho.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforho.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulcelltotalthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulcelltotalthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_ulolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_ulolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_ulolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_ulolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulcelltotalthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforho.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforother.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdfornonamr.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforamr.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_cellulequnumcapacity.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_cellulequnumcapacity.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.html


16/74

WCDMA RAN




3-10

Where

ThdLis the PBR threshold (HsupaLowPrior i tyUserPBRThd)for all HSUPA users whosescheduling priorities are lower than the priority of users to be admitted.

ThdEis the PBR threshold (HsupaEqualPrior i tyUserPBRThd)for all HSUPA users whose

scheduling priorities are equal to the priority of users to be admitted.

ThdGEis the PBR threshold (HsupaHighPrior i tyUserPBRThd)for all HSUPA users whosescheduling priorities are higher than the priority of users to be admitted.

Load-based admission decisions

For HSUPA scheduling services, if the sum of the RTWP-based total uplink load (UL,HSUPA-Total) and

the load increase caused by the new service (UL) is lower than or equal toUlCellTotalThd,

load-based service admission succeeds. Otherwise, load-based service admission fails.

For HSUPA non-scheduling services, load-based service admission succeeds only when both of the

following criteria are met:

The sum of the RTWP-based total uplink load (UL,HSUPA-Total) and the load increase caused by thenew service (UL) is lower than or equal toUlCellTotalThd.

The sum of the uncontrollable uplink load (UL,NonCtrl) and the load increase caused by the new

service (UL) is lower than or equal to the corresponding admission threshold

(UlNonCtr lThdForAMR,UlNonCtr lThdForNonAMR,UlNonCtr lThdForOther,or

UlNonCtr lThdForHo).

Otherwise, load-based service admission fails.




Downlink Power-based Admission Decisions for R99 Cells Based onAlgorithm 1

In an R99 cell, downlink power-based admission decisions are made according to the TCP-based totaldownlink load, which is calculated in real time by the load measurement module of the RNC. It isrepresented by DL,R99-Totaland calculated using the following formula:

DL,R99-Total = TCP+ DL,CCH

Where

TCPis equal to the transmitted carrier power (TCP), which is the ratio of the total transmitted power onone downlink carrier to the maximum transmission power (set by theMaxTxPowerparameter).

DL,CCHis the reserved load on the downlink common channels. It is set by theDlCCHLoadRsrvCoeffparameter.

Upon receiving a service access request, the RNC makes the downlink power-based admission decisionfor an R99 service. The procedure is as follows:

1. The RNC calculates the downlink load increase (DL) based on the initial admission rate of theservice and the pilot signal quality the user receives.
http://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_hsupalowpriorityuserpbrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_hsupalowpriorityuserpbrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_hsupalowpriorityuserpbrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_hsupaequalpriorityuserpbrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_hsupaequalpriorityuserpbrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_hsupaequalpriorityuserpbrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_hsupahighpriorityuserpbrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_hsupahighpriorityuserpbrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_hsupahighpriorityuserpbrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulcelltotalthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulcelltotalthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulcelltotalthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulcelltotalthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulcelltotalthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulcelltotalthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulcelltotalthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforamr.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforamr.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforamr.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdfornonamr.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdfornonamr.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdfornonamr.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforother.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforother.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforother.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforho.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforho.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_ulolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_ulolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_ulolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucell_maxtxpower.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucell_maxtxpower.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucell_maxtxpower.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlcchloadrsrvcoeff.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlcchloadrsrvcoeff.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlcchloadrsrvcoeff.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlcchloadrsrvcoeff.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucell_maxtxpower.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_ulolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforho.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforother.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdfornonamr.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulnonctrlthdforamr.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulcelltotalthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_ulcelltotalthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_hsupahighpriorityuserpbrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_hsupaequalpriorityuserpbrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_hsupalowpriorityuserpbrthd.html


17/74

WCDMA RAN




3-11

2. If the TCP-based total downlink load (DL,R99-Total) is lower than or equal to the corresponding

admission threshold (DlConvAMRThd,DlConvNonAMRThd,DlOtherThd,orDlHOThd), the RNC

admits the service. Otherwise, the RNC rejects the service.


When the OLC algorithm switch (DL_UU_OLCunder theNBMLdcAlgoSwi tchparameter) is turned on, the downlinkOLC triggering threshold (DlOlcTrigThd)is used as the admission threshold.

When the OLC algorithm switch (DL_UU_OLCunder theNBMLdcAlgoSwi tchparameter) is turned off, the admissionthreshold is 100%.

Downlink Power-based Admission Decisions for HSPA Cells Based onAlgorithm 1

In an HSPA cell, downlink power-based admission decisions are made based on the following loadmeasurements:

TCP-based total downlink load, which is represented by DL,HSDPA-Totaland calculated using thefollowing formula:

DL,HSDPA-Total = TCP+ DL,CCH+ DL,HSUPARes

Where DL,HSUPAResis the power load reserved for HSUPA downlink control channels

(E-AGCH/E-RGCH/E-HICH). It is set by theDlHSUPARsvdFactorparameter. The other variables are

defined the same way as for an R99 cell in "Downlink Power-based Admission Decisions for R99 Cells

Based on Algorithm 1."

Downlink non-HSPA power load, which is represented by DL,NonHSPA. It is the ratio of the total

transmitted power of the codes not used for HS-PDSCH/HS-SCCH/E-AGCH/E-RGCH/E-HICH

transmission on one downlink carrier to the maximum transmission power (set by theMaxTxPower

parameter). DL,NonHSPAis measured by the NodeB and periodically reported to the RNC.

Load of HSDPA power requirement for GBR (HSDPA GBP), which is represented by DL,GBPandcalculated based on the GBR of HSDPA users in the cell. The NodeB periodically reports DL,GBPto theRNC.

HSDPA GBP-based total downlink load, which is represented by DL,GBP-Totaland calculated using thefollowing formula:

DL,GBP-Total= DL,NonHSPA+ min (DL,GBP+ DL,HSUPARes, DL,MaxHSPA) + DL,CCH

Where DL,MaxHSPAis the threshold for the maximum available HSDPA power. It is calculated based ontheHspaPowerparameter.

The total downlink load for preferential admission of R99 services, which is represented by

DL,R99Prefer-Total. When the GBR for HSDPA services is too high, the HSDPA GBP-based total downlink

load may also be too high, and therefore R99 service admission is difficult. In this case, DL,R99Prefer-Totalensures that R99 services are preferentially admitted. It is calculated using the following formula:

DL,R99Prefer-Total= DL,NonHSPA+ ThdHSDPAMaxGBP+ DL,HSUPARes+ DL,CCH

Where ThdHSDPAMaxGBPis the maximum guaranteed load threshold for HSDPA services when the RNC

makes an admission decision on an R99 service. It is set by theHsdpaMaxGBPThdparameter.

Upon receiving a service access request, the RNC performs the downlink power-based admissiondecision. The procedure is as follows:

1. The RNC calculates the downlink load increase (DL) based on the initial admission rate of the

service and the pilot signal quality the user receives.
http://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlconvamrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlconvamrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlconvamrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlconvnonamrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlconvnonamrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlconvnonamrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlotherthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlotherthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlotherthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlhothd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlhothd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlhothd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_dlolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_dlolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_dlolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlhsuparsvdfactor.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlhsuparsvdfactor.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlhsuparsvdfactor.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucell_maxtxpower.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucell_maxtxpower.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucell_maxtxpower.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellhsdpa_hspapower.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellhsdpa_hspapower.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellhsdpa_hspapower.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_hsdpamaxgbpthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_hsdpamaxgbpthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_hsdpamaxgbpthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_hsdpamaxgbpthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellhsdpa_hspapower.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucell_maxtxpower.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlhsuparsvdfactor.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_dlolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlhothd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlotherthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlconvnonamrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlconvamrthd.html


18/74

WCDMA RAN




3-12

2. The RNC determines whether to admit the service. The admission criteria vary with the bearer type inan HSPA cell.

The admission criteria for different bearer types in an HSPA cell are as follows:

For the DCH RABIf the bearer type is the DCH RAB, a service is admitted only when the following criteria are both met:

1. The sum of the downlink non-HSPA power load (DL,NonHSPA) and the load increase caused by thenew service (DL) is lower than or equal to the corresponding admission threshold(DlConvAMRThd,DlConvNonAMRThd,DlOtherThd,orDlHOThd).

2. The sum of the TCP-based total downlink load (DL,HSDPA-Total) and the load increase caused by the

new service (DL), the sum of the total downlink load based on the guaranteed power for HSDPA

services (DL,GBP-Total) and the load increase caused by the new service (DL), or the sum of the totaldownlink load for preferential admission of R99 services (DL,R99Prefer-Total) and the load increasecaused by the new service (DL) is lower than or equal to the threshold for the total downlink power

of the cell (DlCellTotalThd). Otherwise, the RNC rejects the service.



When the OLC algorithm switch (DL_UU_OLCunder theNBMLdcAlgoSwi tchparameter) is turned off, the admission

threshold is 100%.

If the current cell supports DC-HSDPA, the current total power of the DC-HSDPA cell group must also belower than the sum of the total downlink power threshold of the primary cell and that of the secondary

cell for DCH RAB admission.

For the HSDPA RAB

If the bearer type is the HSDPA RAB, the CAC algorithm combines the PBR-based admission controlwith the load-based admission control. The RNC admits an HSDPA service if either PBR-basedadmission or load-based admission succeeds.

PBR-based admission decisions

The downlink PBR is the effective downlink throughput on all UEs corresponding to an SPIsuccessfully sent by the NodeB. PBR is reported by the NodeB to the RNC periodically.

The RNC performs PBR-based admission control only when the HSDPA PBR measurement switch isturned on (HSDPA_PBR_MEASunder theNBMCacAlgoSwitchparameter is set to 1). If the sum ofPBRs of some UEs is larger than the sum of their GBRs multiplied by a certain factor, the RNCdecides that the QoS requirements of the cell are met. In this case, the RNC can admit new services.PBR-based service admission succeeds if equation a (for streaming services) or equation b (for BEservices) is satisfied:

a.

b.

Where
http://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlconvamrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlconvamrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlconvamrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlconvnonamrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlconvnonamrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlconvnonamrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlotherthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlotherthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlotherthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlhothd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlhothd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlhothd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlcelltotalthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlcelltotalthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlcelltotalthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_dlolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_dlolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_dlolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmcacalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_dlolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlcelltotalthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlhothd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlotherthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlconvnonamrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlconvamrthd.html


19/74

WCDMA RAN




3-13

PBRstrmis the provided bit rate of all existing streaming services.

Thdhsdpa-stris the admission threshold of the PBR-based decision for streaming services(HsdpaStrmPBRThd).

PBRbeis the provided bit rate of all existing BE services.

Thdhsdpa-beis the admission threshold of the PBR-based decision for BE services(HsdpaBePBRThd).

Load-based admission decisions

Load-based service admission succeeds only when both of the following criteria are met:

The sum of the HSDPA GBP load (DL,GBP) and the load increase caused by the new service (DL) is

lower than or equal to the threshold for the maximum available HSDPA power, which is equal to 1-10

(-HspaPower/10).

The sum of the TCP-based total downlink load (DL,HSDPA-Total) and the load increase caused by the

new service (DL), or the sum of the HSDPA GBP-based total downlink load (DL,GBP-Total) and the

load increase caused by the new service (DL) is lower than or equal to the threshold for the total

downlink power of the cell (DlCellTotalThd).

Otherwise, load-based service admission fails.



When the OLC algorithm switch (DL_UU_OLCunder theNBMLdcAlgoSwi tchparameter) is turned off, the admission

threshold is 100%.

If the current cell supports DC-HSDPA, the total power of the DC-HSDPA cell group must be lower thanthe sum of the downlink total power threshold of the primary cell and that of the secondary cell forHSDPA RAB admission.

Conversational services in the PS domain carried on HSPA RABs can be considered as streaming services in admissioncontrol.

For the DC-HSDPA RAB

If the bearer type is the DC-HSDPA RAB, admission control is based on the power of the DC-HSDPA cellgroup because the RAB is set up on both carriers.

The RNC admits DC-HSDPA RABs in the following situations:

PBR-based service admission in the DC-HSDPA cell group succeeds. PBR-based admission controlin the DC-HSDPA cell group is similar to that in the SC-HSDPA cell. The difference between them isthat users selected during an admission decision are DC-HSDPA users in the DC-HSDPA cell group,not SC-HSDPA users.

Load-based service admission in the DC-HSDPA cell group succeeds. This means that the totaldownlink load factor of the DC-HSDPA cell group is lower than the sum of the total downlink loadthreshold of the primary cell and that of the secondary cell.

For HSUPA Control Channels

The power for downlink control channels (E-AGCH/E-RGCH/E-HICH) is specified by theDlHSUPARsvdFactorparameter. Therefore, power-based admission control is not required on these

channels.
http://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_hsdpastrmpbrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_hsdpastrmpbrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_hsdpastrmpbrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_hsdpabepbrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_hsdpabepbrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_hsdpabepbrthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellhsdpa_hspapower.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellhsdpa_hspapower.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellhsdpa_hspapower.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlcelltotalthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlcelltotalthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlcelltotalthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_rsvdpara1.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_dlolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_dlolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellldm_dlolctrigthd.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgoswitch.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlhsuparsvdfactor.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlhsuparsvdfactor.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellcac_dlhsuparsvdfactor.htmlhttp://localhost/var/www/apps/conversion/tmp/RNCParaHtml/mbsc/m-para/ucellalgoswitch_nbmldcalgosw

Download - Call Admission Control(RAN13.0_03)

Top Related