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WCDMA RAN

Call Admission Control Feature Parameter Description

Copyright © Huawei Technologies Co., Ltd. 2010. All rights reserved.

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Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd

WCDMA RAN Call Admission Control Contents

Issue 04 (2010-12-20) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd

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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 Resource .................................................................................................... 3-2 3.3 CAC Based on Power Resource................................................................................................... 3-2

3.3.1 Overview............................................................................................................................... 3-2 3.3.2 Admission Decision for RRC Connection Setup Request .................................................... 3-4 3.3.3 Power-Based Admission Algorithm 1 for RAB Setup ........................................................... 3-4 3.3.4 Power-Based Admission Algorithm 2 for RAB Setup ........................................................... 3-7 3.3.5 Power-Based Admission Algorithm 3 for RAB Setup ........................................................... 3-9

3.4 CAC Based on NodeB Credit Resource ....................................................................................... 3-9 3.4.1 NodeB Credit ........................................................................................................................ 3-9 3.4.2 Procedure of Admission Decision Based on NodeB Credit.................................................. 3-9

3.5 CAC Based on Iub Resource ...................................................................................................... 3-10 3.6 CAC Based on the Number of HSPA Users................................................................................ 3-10

3.6.1 CAC of HSDPA Users......................................................................................................... 3-10 3.6.2 CAC of HSUPA Users......................................................................................................... 3-10

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

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

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

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

WCDMA RAN Call Admission Control 1 Introduction


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1 Introduction 1.1 Scope This document describes the feature "WRFD-020101 Admission Control"; it describes how to make an admission for a service, and furthermore provides parameters associated with this 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 History This section provides information on the changes in different document versions.

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

Feature change: refers to the change in the CAC feature. Editorial change: refers to the change in wording or the addition of the information that was not described in the earlier version.

Document Issues The document issues are as follows:

04 (2010-12-20) 03 (2010-10-15) 02 (2010-06-20) 01 (2010-03-30) Draft (2009-12-05)

04 (2010-12-20) This is the document for the fourth commercial release of RAN12.0.

Compared with issue 03 (2010-10-15) of RAN12.0, this issue modifies the Control RTWP Anti-interference function switch.

03 (2010-10-15) This is the document for the third commercial release of RAN12.0.

Compared with issue 02 (2010-06-20) of RAN12.0, this issue optimizes the description.

02 (2010-06-20) This is the document for the second commercial release of RAN12.0.

Compared with issue 01 (2010-03-30) of RAN12.0, this issue incorporates the changes described in the following table.

1 Introduction WCDMA RAN

Call Admission Control

1-2 Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd

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Change Type Change Description Parameter Change

Feature change The CAC based on power resource is optimized. For details, see 3.3 “CAC Based on Power Resource.”

The added parameters are listed as follows: HsdpaMaxGBPThd HsupaMaxGBPThd

Editorial change The CAC based on NodeB credit resource is optimized. For details, see 3.4 “CAC Based on NodeB Credit Resource.”

None.

01 (2010-03-30) This is the document for the first commercial release of RAN12.0.

Compared with issue Draft (2009-12-05) of RAN12.0, this issue optimizes the description.

Draft (2009-12-05) This is the draft of the document for RAN12.0.

This is a new document. It is separated from the document Load Control Feature Parameter Description.

WCDMA RAN Call Admission Control 2 Overview of Call Admission Control


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2 Overview of Call Admission Control Call Admission Control (CAC) is used to determine whether the system resources in a cell are sufficient to accept the 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 are required, in cases such as RRC connection setup, new service setup, change of existing services, soft handover, and cell change. On receipt of the resource request, the CAC functional module determines whether the request can be accepted by measuring the cell load and the requested resources. For details about measuring the cell load, see the Load Control Feature Parameter Description.

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

By using CAC, an overloaded cell accepts only resources requests from an RRC connection setup only in case of an emergency call, detach, or registration, because the priority of such requests is very high. This helps maintain the system stability in the case of cell overload. Moreover, whether the admission for users over FACH channels is permitted can be set through FACH_UU_ADCTRL subparameter of NBMCacAlgoSwitch parameter.

WCDMA RAN Call Admission Control 3 Technical Description


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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 are required. On receipt of the resource request, the CAC functional module performs the admission decision based on the following resources.

Available cell code resource Available cell power resource NodeB credits, 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)

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

Figure 3-1 Basic procedure of resource-based admission decision

3 Technical Description WCDMA RAN



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As shown in Figure 3-1, a call can be admitted only when all of these resources are available.

Code and Iub resource-based admission control are mandatory and can not be disabled. Other admission control strategies may be enabled or disabled through the ADD UCELLALGOSWITCH command.

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

Iub resource admission for HSDPA users is also performed during the admission control to allow HSDPA service and other R99 services to be admitted under a certain ensured QoS.

HSDPA admission control is described together with R99 service admission control in detail in this document.

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

Iub resource admission and NodeB credit resource for HSUPA users are also performed during the admission control to allow HSUPA service and other R99 services to be admitted under a certain ensured QoS.

HSUPA admission control is described together with R99 service admission control in detail in this document.

3.2 CAC Based on Code Resource When a new service attempts to access the network, code resource-based admission is mandatory.

Code resource-based admission is implemented as follows:

For RRC connection setup requests, the code resource-based admission is successful if the current remaining code resource is sufficient for RRC connection setup.

For handover services, the code resource-based admission is successful if the current remaining code resource is sufficient for the service.

For other R99 services, the RNC has to ensure that the remaining code does not exceed the DlHoCeCodeResvSf parameter after admission of the new service.

For HSDPA services, the reserved codes are shared by all HSDPA services. Therefore, the code resource-based admission is not required.

For details about HSDPA code allocation, see the HSDPA Feature Parameter Description.

3.3 CAC Based on Power Resource 3.3.1 Overview Power-based admission decision is used for an RRC connection setup request and RAB admission decision.

The algorithm switches are set by the NBMUlCacAlgoSelSwitch or NBMDlCacAlgoSelSwitch.



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To enable the power-based admission control for HSDPA/HSUPA, the HSDPA_UU_ADCTRL or HSUPA_UU_ADCTRL subparameter must also be set to 1.

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

Algorithm 1 (ALGORITHM_FIRST): admission decision based on predicted load increment upon admission of a new service Based on the current cell load (indicated by the uplink load factor and downlink TCP) and the predicted load increment due to admission of the new service, the RNC determines whether the cell load exceeds the threshold upon admitting the new service. If yes, the RNC rejects the access request. Otherwise, the RNC accepts the access request.

Algorithm 2 (ALGORITHM_SECOND): admission decision based on the ENU Depending on the current ENU and the access request, the RNC determines whether the ENU will exceed the threshold upon admitting a new service. If yes, the RNC rejects the request. Otherwise, the RNC accepts the request.

Algorithm 3 (ALGORITHM_THIRD): admission decision based on no load increment upon admission of a new service This algorithm assumes that the load increment upon admission of a new service is 0. Based on the current cell load (indicated by the uplink load factor and downlink TCP), the RNC determines whether the cell load will exceed the threshold upon admitting the new service. If yes, the RNC rejects the access request. Otherwise, the RNC accepts the access request.

Figure 3-2 shows the basic procedure of power-based admission decision.

Figure 3-2 Basic procedure of power-based admission decision

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

For an intra-frequency handover request, only downlink admission decision is required if downlink CAC is enabled.




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For a non-intra-frequency handover request, both uplink and downlink decisions are required if both uplink CAC and downlink CAC are enabled.

If there is a rate downsizing request, the RNC accepts it directly. For a rate upsizing request, the RNC makes the decision, as shown in Figure 3-2.

3.3.2 Admission Decision for RRC Connection Setup Request For the RRC connection setup request due to an emergency call, detach, or registration, direct admission is used.

For the RRC connection setup request for other reasons, the admission decision for RRC connection setup request is as follows:

When power-based admission is based on power (algorithm 1 and algorithm 3), the UL or DL OLC trigger threshold (UlOlcTrigThd or DlOlcTrigThd) is used for admission.

When power-based admission is based on the ENU (algorithm 2), the admission decision is made as follows: − When UL_UU_OLC or DL_UU_OLC is set to 1, RRC connection setup request is rejected when the cell is in the overload state. If the cell is not in the overload state, the UL or DL OLC trigger threshold is used for power-based admission.

− When UL_UU_OLC or DL_UU_OLC is set to 0, the UL or DL OLC trigger threshold is used for power-based admission.

3.3.3 Power-Based Admission Algorithm 1 for RAB Setup Power-based admission decision based on algorithm 1 consists of uplink power-based admission decision and downlink power-based admission decision procedures.

Uplink Power-Based Admission Decision for R99 Cells Based on Algorithm 1 The following figure shows the criterion of uplink power-based admission decision for R99 cells.

Figure 3-3 The criterion of uplink power-based admission decision for R99 cells



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The procedure of uplink power-based admission decision is as follows:

2. The RNC obtains the uplink RTWP of the cell and the background noise and calculates the current uplink load factor.

3. The RNC calculates the uplink load increment based on the service request. 4. The RNC predicts the uplink load factor according to the current uplink load factor and the uplink load

increment. Note that the predicted uplink load factor also includes the reserved common channel load which is specified by UlCCHLoadFactor.

5. By comparing the predicted uplink load factor with the corresponding threshold (UlNonCtrlThdForHo, UlNonCtrlThdForAMR, UlNonCtrlThdForNonAMR, or UlNonCtrlThdForOther), the RNC decides whether to accept the access request. If the access request is accepted, the RNC processes the access request. If the access request is rejected, the RNC performs the next step.

6. The RNC checks whether the Control RTWP Anti-interference function switch (NBMCacAlgoSwitch: RTWP_RESIST_DISTURB) is enabled. If it is enabled, the RNC checks whether the uplink equivalent user load proportion of the cell is lower than 40%. If it is lower than 40%, the RNC accepts the access request. Otherwise, the RNC rejects the access request.

Uplink Power-Based Admission Decision for HSPA Cells Based on Algorithm 1 The procedure of uplink power-based admission decision for HSPA cells is similar to that for R99 cells.

1. The RNC calculates the current uplink load factor based on RTWP.

After the Received Scheduled E-DCH Power Share (RSEPS) measurement is introduced, the uplink RTWP is divided into two parts: − Controllable part, which is generated by the E-DCH scheduling service. The controllable part is calculated based on the RSEPS.

− Uncontrollable part, which is generated by the other services. The uncontrollable part is the difference between the current uplink load factor and controllable part.

2. The RNC calculates the uplink load increment based on the service request using Ec/N0 of the GBR of the service, neighboring interference factor, and AF of the service.

3. The RNC determines whether to grant the UE admission. In an HSPA cell, the admission conditions vary with the types of services. For the DCH service, the sum of the uncontrollable part of RTWP and the uplink load increment must be smaller than the corresponding threshold ( UlNonCtrlThdForAMR, UlNonCtrlThdForNonAMR, UlNonCtrlThdForOther, or UlNonCtrlThdForHo). In addition, the total uplink load of the cell must be lower than UlCellTotalThd. The method of calculating the total uplink load of the cell is as follows: − Sum of the uplink load factor calculated on the basis of RTWP and load increment − Sum of the uncontrollable part of the RTWP and HsupaMaxGBPThd For the HSUPA service, the CAC algorithm combines the PBR-based decision with the load-based decision. The RNC admits the HSUPA services when PBR-based decision is fulfilled or load-based decision is fulfilled. − PBR-based decision: It is used to check whether the QoS requirement of all existing users is met. The QoS is measured on the basis of the Provided Bit Rate (PBR) of the users. If the QoS requirement is fulfilled, new users are allowed to access the network.

− Load-based decision: For HSUPA scheduling services, the RNC must ensure the total uplink load factor is lower than UlCellTotalThd. For HSUPA non-scheduling services, the RNC must ensure that the total uplink load factor is lower than UlCellTotalThd and the power of non-controllable part is lower than the corresponding admission threshold.




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In this step, if the access request is rejected, the RNC performs the next step. 4. The RNC checks whether the Control RTWP Anti-interference function switch (NBMCacAlgoSwitch:

RTWP_RESIST_DISTURB) is enabled. If it is enabled, the RNC checks whether the uplink equivalent user load proportion of the cell is lower than 40%. If it is lower than 40%, the RNC accepts the access request. Otherwise, the RNC rejects the access request.

The IMS signaling service over HSUPA can be admitted directly. In the above admission decision, the uplink load factor also includes the reserved common channel load which is

specified by UlCCHLoadFactor..

Downlink Power-Based Admission Decision for R99 Cells Based on Algorithm 1 The downlink power-based admission decision for R99 cells is similar with that of uplink. The procedure is as follows:

1. The RNC calculates the current downlink load factor according to the downlink TCP and calculates the downlink load increment based on the service request.

2. The RNC predicts the downlink load factor according to the current downlink load factor and the downlink load increment. The predicted downlink load factor also includes the reserved common channel load which is specified by DlCCHLoadRsrvCoeff.

3. By comparing the downlink load factor with the corresponding threshold (DlConvAMRThd, DlConvNonAMRThd, DlOtherThd, or DlHOThd), the RNC decides whether to accept the access request.

Downlink Power-Based Admission Decision for HSPA Cells Based on Algorithm 1 The procedure of downlink power-based admission decision for HSPA cells is as follows:

1. The RNC calculates the downlink power increment for new service request. − The power increment estimation for the DCH RAB in the HSPA cell is similar to the DCH RAB in the R99 cell.

− The power increment estimation for HSDPA RAB is made on the basis of GBR, Ec/N0, non-orthogonal factor, and so on.

2. The RNC determines whether to grant the UE admission.

Admission Decision for DCH RAB in the Downlink

When the admission of the DCH RAB is implemented, the RNC performs the following step:

1. The RNC evaluates whether the ratio of the current non-HSPA power after the new RAB access to the maximum transmit power of the cell is lower than or equal to the cell downlink admission threshold for a specific type of service. The threshold may be DlConvAMRThd, DlConvNonAMRThd, DlOtherThd, or DlHOThd. If the condition is met, the RNC performs the next step. Otherwise, the admission will fail.

2. The RNC evaluates whether the ratio of the current downlink total power after the new RAB access to the maximum transmit power of the cell is lower than or equal to the threshold of the total downlink power of the cell (DlCellTotalThd).

− The HSDPA power included in the current downlink total power can be set by HsdpaMaxGBPThd or evaluated through GBP and the maximum power available for HSPA.



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− The current downlink total power also includes all kinds of reserved power, for example, the power for the common channel, the power for HSUPA downlink control channels.

If the condition is met, the RNC admits the DCH RAB. Otherwise, the admission will fail.

If the current cell supports DC-HSDPA, it is further required that the current total power of the DC-HSDPA cell group must be lower than the sum of the total downlink power threshold of the primary cell and that of the secondary cell.

Admission Decision for HSDPA RAB in the Downlink When the admission of the HSDPA RAB is implemented, the PBR-based decision and load-based decision will be performed. The RNC grants the UE admission when either of the decision is fulfilled. − PBR-based decision: It is required that the PBR of all existing services is higher than or equal to the admission threshold HsdpaStrmPBRThd/HsdpaBePBRThd.

− Load-based decision: It is required that the total downlink load after the new RAB access is lower than or equal to the threshold of the total downlink power of the cell (DlCellTotalThd). The total downlink load after new RAB access can be calculated through either of the following way: a. The sum of the current TCP and the power increment for new RAB b. The sum of the current non-HSPA power and the GBP of all existing HSDPA services

The total downlink load also includes all kinds of reserved power, for example, the power for the common channel, the power for HSUPA downlink control channels.

If the current cell supports DC-HSDPA, it is further required that the current total power of the DC-HSDPA cell group must be lower than the sum of the total downlink power threshold of the primary cell and that of the secondary cell.

If PS conversational services are carried on HSPA, the services can be treated as streaming services during admission control.

Admission Decision for DC-HSDPA RAB in the Downlink The admission of DC-HSDPA RAB is based on the power of the DC-HSDPA cell group because the RAB is set up on both carriers. The RNC admits the DC-HSDPA RAB in any of the following situations: − PBR-based decision in DC-HSDPA cell group is admitted. PBR-based decision in DC-HSDPA cell group is similar to that in SC-HSDPA cell. The difference between them is that the users selected during the decision is the DC-HSDPA users in DC-HSDPA cell group other than SC-HSDPA users.

− Load-based decision in DC-HSDPA cell group is admitted. That is, the total uplink load factor of DC-HSDPA cell group is smaller than the sum of the total uplink load threshold of the primary cell and that of the secondary cell.

Admission Decision for HSUPA Control Channels in the Downlink The power of downlink control channels (E-AGCH/E-RGCH/E-HICH) is determined by DlHSUPARsvdFactor. Therefore, the power-based admission for these channels is not required.

Downlink Power-Based Admission Decision for MBMS For details, see the MBMS Feature Parameter Description.

3.3.4 Power-Based Admission Algorithm 2 for RAB Setup Power-based admission decision based on algorithm 2 consists of uplink power-based admission decision and downlink power-based admission decision procedures.




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The ENU of MBMS downlink control channels (MICH and MCCH) is reserved. Therefore, the power-based admission for these channels is not required.

The ENU of HSUPA downlink control channels (E-AGCH, E-RGCH, and E-HICH) is reserved by DlHSUPARsvdFactor. Therefore, the power-based admission for these channels is also not required.

Equivalent Number of Users The 12.2 kbit/s AMR traffic is defined as one ENU. Thus, the 12.2 kbit/s AMR traffic can be used to calculate the ENU of all other services. The calculation is related to the following factors:

Cell type, such as urban or suburban Traffic domain, CS or PS Coding type, turbo code or 1/2 1/3 convolutional code Traffic QoS, that is, Block Error Rate (BLER)

Activity values which can be set through MML command SET UADMCTRL.

Procedure of ENU Resource Decision for Uplink Before the admission of the uplink ENU resource, if the uplink OLC algorithm switch (UL_UU_OLC) is enabled and the cell is in the OLC state triggered by the RTWP, then:

The system checks whether the uplink equivalent user load proportion of the cell is lower than 40% if the Control RTWP Anti-interference function switch (NBMCacAlgoSwitch: RTWP_RESIST_DISTURB) is enabled. If it is lower than 40%, the RNC accepts the access request. Otherwise, the RNC performs an admission decision on the uplink ENU resource.

The RNC rejects the access request if the Control RTWP Anti-interference function switch is disabled.

In the normal state, when the uplink ENU admission for a new RAB is implemented, the RNC calculates the uplink ENU of the new incoming RAB, and then estimates whether the ratio of the total uplink ENU after the new RAB access to the maximum ENU (UlTotalEqUserNum) is lower than or equal to the cell uplink admission threshold of a specific type of service. The threshold may be UlNonCtrlThdForAMR, UlNonCtrlThdForNonAMR, UlNonCtrlThdForOther, or UlNonCtrlThdForHo. If the condition is met, the RNC admits the access request.

Moreover, for DCH users, the RNC can also admit the access request when the following condition is met. That is, the ratio of the total uplink ENU of all DCH users after the new RAB access to the maximum ENU (UlTotalEqUserNum) is lower than or equal to difference between UlCellTotalThd and HsupaMaxGBPThd.

Procedure of ENU Resource Decision for Downlink For non-DC-HSDPA RAB If the current cell does not support DC-HSDPA, when the ENU admission of the RAB is implemented, the RNC calculates the downlink ENU of the new incoming RAB, and then estimates whether the ratio of the total downlink ENU after the new RAB access to the maximum ENU (DlTotalEqUserNum) is lower than or equal to the cell downlink admission threshold of a specific type of service. The threshold may be DlConvAMRThd, DlConvNonAMRThd, DlOtherThd, DlHOThd, or DlCellTotalThd. If the condition is met, the RNC admits the access request. Moreover, for DCH users, the RNC can also admit the access request when the following condition is met. That is, the ratio of the total downlink ENU of all DCH users after the new RAB access to the maximum ENU (DlTotalEqUserNum) is lower than or equal to difference between DlCellTotalThd and HsdpaMaxGBPThd.



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For the non-DC-HSDPA RAB, If the current cell supports DC-HSDPA, it is further required that the sum of ENUs of the DC-HSDPA cell group is smaller than the sum of the total uplink load threshold of the primary cell and that of the secondary cell.

For DC-HSDPA RAB The admission is successful when the total ENU divided by the maximum ENU is smaller than the sum of admission thresholds of the two cells.

3.3.5 Power-Based Admission Algorithm 3 for RAB Setup Algorithm 3 is similar to algorithm 1. The difference is that the estimated load increment in algorithm 3 is always set to 0.

In accordance with the current cell load (uplink load factor and downlink TCP), the RNC determines whether the cell load will exceed the threshold, with the estimated load increment set to 0. If the cell load exceeds the threshold, the RNC rejects the request. If not, the RNC accepts the request.

3.4 CAC Based on NodeB Credit Resource When a new service accesses the network, NodeB credit resource-based admission is optional.

3.4.1 NodeB Credit CE is used to measure the channel demodulation capability of the NodeBs. On the RNC side, it is referred to as the NodeB credit. On the NodeB side, it is referred to as the Channel Element (CE).

The consumed NodeB resource of one equivalent 12.2 kbit/s AMR voice service, including 3.4 kbit/s signaling on the Dedicated Control Channel (DCCH), is defined as one CE. If there is only 3.4 kbit/s signaling on the DCCH, one CE is consumed. There are two kinds of CE. One is uplink CE supporting uplink services, and the other is downlink CE supporting downlink services. Therefore, one 12.2 kbit/s AMR voice service consumes one uplink CE and one downlink CE.

There is no capacity consumption law for HS-DSCH in 3GPP TS 25.433. Therefore, certain credits are reserved for HSDPA RAB, and credit admission for HSDPA is not required.

For the DCH service, the RNC uses the MBR to calculate the number of consumed CEs and corresponding credits.For the HSUPA service,

If the dynamic CE function of the cell is enabled, the RNC calculates the number of consumed CEs and corresponding credits based on max (one min RLC PDU bit rate, GBR). − If the uplink enhanced L2 is enabled, the RLC PDU size is flexible. One min RLC PDU bit rate is determined by the minimum RLC PDU size and TTI. The minimum RLC PDU size can be set through the RlcPduMinSizeForUlL2Enhance parameter.

− When the uplink enhanced L2 is disabled, the RLC PDU size is fixed. One RLC PDU bit rate is determined by the RLC PDU size and TTI.

If the dynamic CE function of the cell is disabled, the RNC calculates the number of consumed CEs and corresponding credits based on MBR

If the RNC does not obtain whether the dynamic CE function is enabled from the NodeB, the RNC calculates the number of consumed CEs and corresponding credits based on HsupaCeConsumeSelection.

3.4.2 Procedure of Admission Decision Based on NodeB Credit When a new service tries to access the network, the admission decision based on NodeB credit is implemented as follows:




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For an RRC connection setup request, the credit resource-based admission is successful if the current remaining credit resources of the local cell, local cell group (if any), and NodeB are sufficient for RRC connection setup.

For a handover service, the credit resource-based admission is successful if the current remaining credit resources of the local cell, local cell group (if any), and NodeB are sufficient for the service.

For other services, the RNC has to ensure that the remaining credit of the local cell, local cell group (if any), and NodeB does not exceed the value of UlHoCeResvSf (for the uplink) or DlHoCeCodeResvSf (for the downlink) after admission of the new services.

The CE capabilities at the levels of local cell, local cell group, and NodeB are reported to the RNC through the NBAP_AUDIT_RSP message over the Iub interface.

- The CE capability of local cell level indicates the maximum capability in terms of hardware that can be used in the local cell. - The CE capability of local cell group level indicates the capability obtained after the license and hardware are taken into consideration. - The CE capability of NodeB level indicates the number of CEs allowed to use as specified in the license.

In the current release of product, the UL Capacity Credit (CC) and DL CC are separate. So the credit resource-based admission is implemented in the UL and DL, respectively.

3.5 CAC Based on Iub Resource When a new service accesses the network, Iub resource-admission is mandatory.

For details about resource-based admission at the Iub transport layer, see the Transmission Resource Management Feature Parameter Description.

3.6 CAC Based on the Number of HSPA Users 3.6.1 CAC of HSDPA Users The HSDPA services have to undergo admission decision based on the number of HSDPA users.

When a new HSDPA service attempts to access the network, the algorithm admits the service if the following conditions are met:

The number of HSDPA users in the cell does not exceed the maximum value specified by MaxHsdpaUserNum.

The number of HSDPA users in the NodeB does not exceed the maximum value specified by NodeBHsdpaMaxUserNum.

Otherwise, the HSDPA service is degraded to R99 service to retry admission.

3.6.2 CAC of HSUPA Users The HSUPA services have to undergo admission decision based on the number of HSUPA users.

When a new HSUPA service attempts to access the network, the algorithm admits the service if the following conditions are met:

The number of the HSUPA users in the cell does not exceed the maximum value specified by MaxHsupaUserNum.

The number of the HSUPA users in the NodeB does not exceed the maximum value specified by NodeBHsupaMaxUserNum.



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Otherwise, the HSUPA service is degraded to R99 service to retry admission.

WCDMA RAN Call Admission Control 4 Parameters


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4 Parameters Parameter description

Parameter ID NE MML Command Meaning

DlCCHLoadRsrvCoeff BSC6900

ADD UCELLCAC(Optional)

Meaning: Different admission policies are used for dedicated channel and common channel users. For common channel users, resources instead of separate power admission decision are reserved. For dedicated channel users, according to the current load factor and the characteristics of the new call, the CAC algorithm predicts the new TX power with the assumption of admitting the new call, then plus with the premeditated common channel DL load factor to get the predicted DL load factor. Then, compare it with the DL admission threshold. If the value is not higher than the threshold, the call is admitted; otherwise, rejected. GUI Value Range: 0~100 Actual Value Range: 0~1, step:0.01 Unit: % Default Value: 0

HsdpaMaxGBPThd BSC6900

ADD UCELLCAC(Optional) MOD UCELLCAC(Optional)

Meaning: Threshold of the maximum guaranteed power for HSDPA users. This threshold limits the power that can be used by HSDPA users. Thus, some power resources are reserved for DCH users to ensure their network access. GUI Value Range: 0~100 Actual Value Range: 0~1, step:0.01 Unit: % Default Value: 100

HsupaMaxGBPThd BSC6900

ADD UCELLCAC(Optional) MOD UCELLCAC(Optional)

Meaning: Threshold of the maximum guaranteed power for HSUPA users. This threshold limits the power that can be used by HSUPA users. Thus, some power resources are reserved for DCH users to ensure their network access. GUI Value Range: 0~100 Actual Value Range: 0~1, step:0.01 Unit: % Default Value: 100

DlCellTotalThd BSC6900


Meaning: Admission threshold of the total cell downlink power. If the value is too high, too many users will be admitted. However, the throughput of a single user is easy to be limited. If the value is too low, cell capacity will be wasted.

4 Parameters WCDMA RAN



Issue 04 (2010-12-20)

Parameter ID NE MML Command Meaning GUI Value Range: 0~100 Actual Value Range: 0~1, step:0.01 Unit: % Default Value: 90

DlConvAMRThd BSC6900


Meaning: The percentage of the conversational AMR service threshold to the 100% downlink load. It is applicable to algorithm 1 and algorithm 2. The parameter is used for controlling the AMR service admission. That is, when an AMR service is accessing, the RNC evaluates the measurement value of the downlink load after the service is accessed. If the DL load of a cell is higher than this threshold after the access of an AMR speech service, this service will be rejected. If the DL load of a cell will not be higher than this threshold, this service will be admitted. The DL load factor thresholds include parameters of [DL threshold of Conv non_AMR service], [DL handover access threshold] and [DL threshold of other services]. The four parameters can be used to limit the proportion between the conversational service, handover user and other services in a specific cell, and to guarantee the access priority of the conversational AMR service. GUI Value Range: 0~100 Actual Value Range: 0~1, step:0.01 Unit: % Default Value: 80

DlConvNonAMRThd BSC6900


Meaning: The percentage of the conversational non-AMR service threshold to the 100% downlink load. It is applicable to algorithm 1 and algorithm 2. The parameter is used for controlling the non-AMR service admission. That is, when a non-AMR service is accessing, the RNC evaluates the measurement value of the downlink load after the service is accessed. If the DL load of a cell is higher than this threshold after the access of a non-AMR speech service, this service will be rejected. If the DL load of a cell will not be higher than this threshold, this service will be admitted. The DL load factor thresholds include parameters of [DL threshold of Conv non_AMR service], [DL handover access threshold] and [DL threshold of other services]. The four parameters can be used to limit the proportion between the conversational service, handover user and other services in a specific cell, and to guarantee the access priority of the conversational non-AMR service. GUI Value Range: 0~100 Actual Value Range: 0~1, step:0.01



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Parameter ID NE MML Command Meaning Unit: % Default Value: 80

DlHoCeCodeResvSf BSC6900


Meaning: Some cell resources can be reserved for handover UEs to guarantee handover success rate and improve access priority of handover services. This parameter defines the quantity of downlink code and CE resources reserved for handover. SFOFF refers to that no resources are reserved. SF32 refers to that a code resource with SF = 32 and its corresponding credit resource are reserved. GUI Value Range: SF4(SF4), SF8(SF8), SF16(SF16), SF32(SF32), SF64(SF64), SF128(SF128), SF256(SF256), SFOFF(SFOFF) Actual Value Range: SF4, SF8, SF16, SF32, SF64, SF128, SF256, SFOFF Unit: None Default Value: SF32

DlHOThd BSC6900


Meaning: The percentage of the handover service admission threshold to the 100% downlink load. It is applicable to algorithm 1 and algorithm 2. The parameter is used for controlling the handover admission. That is, when a service is handing over to a cell, the RNC evaluates the measurement value of the downlink load after the service is accessed. If the DL load of a cell is higher than this threshold after the access, this service will be rejected. If the DL load of a cell will not be higher than this threshold, this service will be admitted. GUI Value Range: 0~100 Actual Value Range: 0~1, step:0.01 Unit: % Default Value: 85

DlHSUPARsvdFactor BSC6900


Meaning: Reserved DL power factor for HSUPA user. The higher the value is, the more resources reserved for the HSUPA control channel, which leads to resource waste. If the value is too low, HSUPA user quality may be impacted. GUI Value Range: 0~100 Actual Value Range: 0~1, step:0.01 Unit: % Default Value: 0

DlOlcTrigThd BSC6900

ADD UCELLLDM(Optional)

Meaning: If the ratio of DL load of the cell to the downlink capacity is not lower than this threshold, the DL overload and congestion control function of the cell is triggered. The value of the OLC release threshold should not be much lower than or close to the OLC trigger threshold, or the system state may




Issue 04 (2010-12-20)

Parameter ID NE MML Command Meaning have a ping-pong effect. The recommended difference between the OLC release threshold and the OLC trigger threshold is higher than 10%. It is desirable to set the two parameters a bit higher given that the difference between OLC trigger threshold and OLC release threshold is fixed. GUI Value Range: 0~100 Actual Value Range: 0~1, step:0.01 Unit: % Default Value: 95

DlOtherThd BSC6900


Meaning: The percentage of other service thresholds to the 100% downlink load. The services refer to other admissions except the conversational AMR service, conversational non-AMR service, and handover scenarios. It is applicable to algorithm 1 and algorithm 2. The parameter is used for controlling other service admissions. That is, when a service is accessing, the RNC evaluates the measurement value of the downlink load after the service is accessed. If the DL load of a cell is higher than this threshold after the access of a service, this service will be rejected. If the DL load of a cell will not be higher than this threshold, this service will be admitted. The DL load factor thresholds include parameters of [DL threshold of Conv non_AMR service], [DL handover access threshold] and [DL threshold of other services]. The four parameters can be used to limit the proportion between the conversational service, handover user and other services in a specific cell, and to guarantee the access priority of other services. GUI Value Range: 0~100 Actual Value Range: 0~1, step:0.01 Unit: % Default Value: 75

DlTotalEqUserNum BSC6900


Meaning: When the algorithm 2 is used, this parameter defines the total equivalent user number corresponding to the 100% downlink load. The parameter should be related to the admission threshold and actual condition of the network. GUI Value Range: 1~200 Actual Value Range: 1~200 Unit: None Default Value: 80

HsdpaBePBRThd BSC6900


Meaning: Average throughput admission threshold of the HSDPA best effort traffic. If the sum of PBR of all the accessed HSDPA BE users is lower than the



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Parameter ID NE MML Command Meaning average throughput admission threshold of the HSDPA BE service multiplied by the sum of GBR of all the accessed HSDPA BE users, it indicates that the QoS of the accessed users cannot be satisfied and new HSDPA BE services are not allowed. Otherwise, the QoS can be satisfied and new HSDPA BE services are allowed. GUI Value Range: 0~100 Actual Value Range: 0~1, step:0.01 Unit: % Default Value: 30

HsdpaStrmPBRThd BSC6900


Meaning: Average throughput admission threshold of the HSDPA streaming service. If the sum of PBR of all the accessed streaming users is lower than the average throughput admission threshold of the HSDPA streaming service multiplied by the sum of GBR of all the accessed streaming users, it indicates that the QoS of the accessed users cannot be satisfied and new HSDPA streaming services are not allowed. Otherwise, the QoS can be satisfied and new HSDPA streaming services are allowed. GUI Value Range: 0~100 Actual Value Range: 0~1, step:0.01 Unit: % Default Value: 70

HsupaCeConsumeSelection

BSC6900

ADD UNODEBALGOPARA(Optional)

Meaning: When the dynamic CE algorithm on NodeB is applied, the CE consumption of HSUPA UE is based on the GBR. When the dynamic CE algorithm on NodeB is not applied, the CE consumption of HSUPA UE is based on the MBR. If the CE consumption of HSUPA UE is based on the GBR, the CE LDR will not select HSUPA users to do data rate reduction. If the CE consumption of HSUPA UE is based on the MBR, the CE LDR will select HSUPA users to do data rate reduction on condition that the HSUPA DCCC switch is ON. GUI Value Range: MBR, GBR Actual Value Range: MBR, GBR Unit: None Default Value: MBR

MaxHsdpaUserNum BSC6900


Meaning: Maximum number of users supported by the HSDPA channel. The user in this parameter refers to the user with services on the HSDPA channel, regardless of the number of RABs carried on the HSDPA channel. Maximum HSDPA user number cannot exceed the HSDPA capability of the NodeB product, In practice, the value can be set based on the cell type and the richness of the




Issue 04 (2010-12-20)

Parameter ID NE MML Command Meaning available HSDPA power and code resources. GUI Value Range: 0~128 Actual Value Range: 0~128 Unit: None Default Value: 64

MaxHsupaUserNum BSC6900


Meaning: Maximum number of users supported by the HSUPA channel. The user in this parameter refers to the user with services on the HSUPA channel, regardless of the number of RABs carried on the HSUPA channel. Maximum HSUPA user number cannot exceed the HSUPA capability of the NodeB product, In practice, the value can be set based on the cell type and the richness of the available HSUPA power and code resources. GUI Value Range: 0~128 Actual Value Range: 0~128 Unit: None Default Value: 20

NBMDlCacAlgoSelSwitch

BSC6900

ADD UCELLALGOSWITCH(Mandatory)

Meaning: The algorithms with the above values represent are as follow: ALGORITHM_OFF: Disable downlink call admission control algorithm. ALGORITHM_FIRST: The load factor prediction algorithm will be used in downlink CAC. ALGORITHM_SECOND: The equivalent user number algorithm will be used in downlink CAC. ALGORITHM_THIRD: The loose call admission control algorithm will be used in downlink CAC. GUI Value Range: ALGORITHM_OFF, ALGORITHM_FIRST, ALGORITHM_SECOND, ALGORITHM_THIRD Actual Value Range: ALGORITHM_OFF, ALGORITHM_FIRST, ALGORITHM_SECOND, ALGORITHM_THIRD Unit: None Default Value: None

NBMCacAlgoSwitch BSC6900

ADD UCELLALGOSWITCH(Optional) MOD UCELLALGOSWITCH(Optional)

Meaning: "The above values of the algorithms represent the following information: CRD_ADCTRL: Control Cell Credit admission control algorithm Only when NODEB_CREDIT_CAC_SWITCH which is set by the SET UCACALGOSWITCH command and this switch are on,the Cell Credit admission control algorithm is valid. HSDPA_UU_ADCTRL: Control HSDPA UU Load admission control algorithm HSDPA_GBP_MEAS: Control HSDPA HS-DSCH Required Power measurement



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Parameter ID NE MML Command Meaning HSDPA_PBR_MEAS: Control HSDPA HS-DSCH Provided Bit Rate measurement HSUPA_UU_ADCTRL: Control HSUPA UU Load admission control algorithm MBMS_UU_ADCTRL: Control MBMS UU Load admission control algorithm HSUPA_PBR_MEAS: Control HSUPA Provided Bit Rate measurement HSUPA_EDCH_RSEPS_MEAS: Control HSUPA Provided Received Scheduled EDCH Power Share measurement EMC_UU_ADCTRL: Control power admission for emergency user RTWP_RESIST_DISTURB: Control algorithm of resisting disturb when RTWP is abnormal FACH_UU_ADCTRL: The switch for resource admission to the FACH over the Uu interface (FACH_UU_ADCTRL) is used to enable or disable the user admission function to FACH. 1. If this switch is enabled: if the current cell is congested due to overload, and the users are with RAB connection requests or RRC connection requests(except the cause of ""Detach"", ""Registration"", or ""Emergency Call""), the users will be rejected. Otherwise FACH user admission procedure is initiated. A user can access the cell after the procedure succeeds. 2. If this switch is disabled: FACH user admission procedure is initiated without the consideration of cell state. MIMOCELL_LEGACYHSDPA_ADCTRL: Legacy HSDPA admission control algorithm in MIMO cell. FAST_DORMANCY_ADCTRL: Control admission for Fast Dormancy user. If this switch is disabled, state transition from CELL-DCH to CELL-PCH or from CELL-FACH to CELL-PCH is not allowed for Fast Dormancy user. If switches above are selected, the corresponding algorithms will be enabled; otherwise, disabled." GUI Value Range: CRD_ADCTRL(Credit Admission Control Algorithm), HSDPA_UU_ADCTRL(HSDPA UU Load Admission Control Algorithm), HSUPA_UU_ADCTRL(HSUPA UU Load Admission Control Algorithm), MBMS_UU_ADCTRL(MBMS UU Load Admission Control Algorithm), HSDPA_GBP_MEAS(HSDPA GBP Meas Algorithm), HSDPA_PBR_MEAS(HSDPA PBR Meas Algorithm), HSUPA_PBR_MEAS(HSUPA PBR Meas Algorithm), HSUPA_EDCH_RSEPS_MEAS(HSUPA EDCH RSEPS Meas Algorithm), EMC_UU_ADCTRL(emergency call power




Issue 04 (2010-12-20)

Parameter ID NE MML Command Meaning admission), RTWP_RESIST_DISTURB(RTWP Resist Disturb Switch), FACH_UU_ADCTRL(FACH power cac switch), MIMOCELL_LEGACYHSDPA_ADCTRL(Legacy HSDPA Admission Control Algorithm in MIMO Cell), FAST_DORMANCY_ADCTRL(Fast Dormancy User Admission Control Algorithm) Actual Value Range: CRD_ADCTRL, HSDPA_UU_ADCTRL, HSUPA_UU_ADCTRL, MBMS_UU_ADCTRL, HSDPA_GBP_MEAS, HSDPA_PBR_MEAS, HSUPA_PBR_MEAS, HSUPA_EDCH_RSEPS_MEAS, EMC_UU_ADCTRL, RTWP_RESIST_DISTURB, FACH_UU_ADCTRL, MIMOCELL_LEGACYHSDPA_ADCTRL, FAST_DORMANCY_ADCTRL Unit: None Default Value: None

NBMUlCacAlgoSelSwitch

BSC6900

ADD UCELLALGOSWITCH(Mandatory)

Meaning: The algorithms with the above values represent are as follow: ALGORITHM_OFF: Disable uplink call admission control algorithm. ALGORITHM_FIRST: The load factor prediction algorithm will be used in uplink CAC. ALGORITHM_SECOND: The equivalent user number algorithm will be used in uplink CAC. ALGORITHM_THIRD: The loose call admission control algorithm will be used in uplink CAC. GUI Value Range: ALGORITHM_OFF, ALGORITHM_FIRST, ALGORITHM_SECOND, ALGORITHM_THIRD Actual Value Range: ALGORITHM_OFF, ALGORITHM_FIRST, ALGORITHM_SECOND, ALGORITHM_THIRD Unit: None Default Value: None

NodeBHsdpaMaxUserNum

BSC6900


Meaning: Maximum number of HSDPA users of the NodeB. If the HSDPA user access is rejected by the NodeB, you can infer that the HSDPA licenses are insufficient. New HSDPA licenses are required. GUI Value Range: 0~3840 Actual Value Range: 0~3840 Unit: None Default Value: 3840

NodeBHsupaMaxUserNum

BSC6900


Meaning: Maximum number of HSUPA users of the NodeB. If the HSUPA user access is rejected by the NodeB, you can infer that the HSUPA licenses are insufficient. New HSUPA licenses are required.



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Parameter ID NE MML Command Meaning GUI Value Range: 0~3840 Actual Value Range: 0~3840 Unit: None Default Value: 3840

UlCCHLoadFactor BSC6900


Meaning: The admission control decision is only for dedicated channels. For common channels, some resources instead of a special admission procedure are reserved. In the UL, according to the current load factor and the characteristics of the new call, the UL CAC algorithm predicts the new traffic channels load factor with the assumption of admitting the new call, then plus with the premeditated common channel UL load factor to get the predicted UL load factor. Then, compare it with the UL admission threshold. If the value is not higher than the threshold, the call is admitted; otherwise, rejected. GUI Value Range: 0~100 Actual Value Range: 0~1, step:0.01 Unit: % Default Value: 0

UlCellTotalThd BSC6900


Meaning: Admission threshold of total cell uplink power. This parameter is related to the target load of the uplink schedule. GUI Value Range: 0~100 Actual Value Range: 0~1, step:0.01 Unit: % Default Value: 83

UlHoCeResvSf BSC6900


Meaning: Uplink Credit Reserved by Spread Factor for HandOver. SFOFF means that none of them are reserved for handover. GUI Value Range: SF4(SF4), SF8(SF8), SF16(SF16), SF32(SF32), SF64(SF64), SF128(SF128), SF256(SF256), SFOFF(SFOFF) Actual Value Range: SF4, SF8, SF16, SF32, SF64, SF128, SF256, SFOFF Unit: None Default Value: SF16

UlNonCtrlThdForAMR BSC6900


Meaning: The percentage of the conversational non-AMR service threshold to the 100% uplink load. It is applicable to algorithm 1 and algorithm 2. The parameter is used for controlling the non-AMR service admission. That is, when a non-AMR service is accessing, the RNC evaluates the measurement value of the uplink load after the service is accessed. If the UL load of a cell is higher than this threshold after the access of a non-AMR speech service, this




Issue 04 (2010-12-20)

Parameter ID NE MML Command Meaning service will be rejected. If the UL load of a cell will not be higher than this threshold, this service will be admitted. The UL load factor thresholds include parameters of [UL threshold of Conv non_AMR service], [UL handover access threshold] and [UL threshold of other services]. The four parameters can be used to limit the proportion between the conversational service, handover user and other services in a specific cell, and to guarantee the access priority of the conversational non-AMR service. GUI Value Range: 0~100 Actual Value Range: 0~1, step:0.01 Unit: % Default Value: 75

UlNonCtrlThdForHo BSC6900


Meaning: The percentage of the handover service admission threshold to the 100% uplink load. It is applicable to algorithm 1 and algorithm 2. The parameter is used for controlling the handover admission. That is, when a service is handing over to a cell, the RNC evaluates the measurement value of the uplink load after the service is accessed. If the UL load of a cell is higher than this threshold after the access, this service will be rejected. If the UL load of a cell will not be higher than this threshold, this service will be admitted. GUI Value Range: 0~100 Actual Value Range: 0~1, step:0.01 Unit: % Default Value: 80

UlNonCtrlThdForNonAMR

BSC6900


Meaning: The percentage of the conversational non-AMR service threshold to the 100% uplink load. It is applicable to algorithm 1 and algorithm 2. The parameter is used for controlling the non-AMR service admission. That is, when a non-AMR service is accessing, the RNC evaluates the measurement value of the uplink load after the service is accessed. If the UL load of a cell is higher than this threshold after the access of a non-AMR speech service, this service will be rejected. If the UL load of a cell will not be higher than this threshold, this service will be admitted. The UL load factor thresholds include parameters of [UL threshold of Conv non_AMR service], [UL handover access threshold] and [UL threshold of other services]. The four parameters can be used to limit the proportion between the conversational service, handover user and other services in a specific cell, and to guarantee the access priority of the conversational non-AMR service.



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Parameter ID NE MML Command Meaning GUI Value Range: 0~100 Actual Value Range: 0~1, step:0.01 Unit: % Default Value: 75

UlNonCtrlThdForOther

BSC6900


Meaning: The percentage of other service thresholds to the 100% uplink load. The services refer to other admissions except the conversational AMR service, conversational non-AMR service, and handover scenarios. It is applicable to algorithm 1 and algorithm 2. The parameter is used for controlling other service admissions. That is, when a service is accessing, the RNC evaluates the measurement value of the uplink load after the service is accessed. If the UL load of a cell is higher than this threshold after the access of a service, this service will be rejected. If the UL load of a cell will not be higher than this threshold, this service will be admitted. The UL load factor thresholds include parameters of [UL threshold of Conv non_AMR service], [UL handover access threshold] and [UL threshold of other services]. The four parameters can be used to limit the proportion between the conversational service, handover user and other services in a specific cell, and to guarantee the access priority of other services. GUI Value Range: 0~100 Actual Value Range: 0~1, step:0.01 Unit: % Default Value: 60

UlOlcTrigThd BSC6900

ADD UCELLLDM(Optional)

Meaning: If the ratio of UL load of the cell to the uplink capacity is not lower than this threshold, the UL overload and congestion control function of the cell is triggered. The value of the OLC release threshold should not be much lower than or close to the OLC trigger threshold, or the system state may have a ping-pong effect. The recommended difference between the OLC release threshold and the OLC trigger threshold is higher than 10%. It is desirable to set the two parameters a bit higher given that the difference between OLC trigger threshold and OLC release threshold is fixed. GUI Value Range: 0~100 Actual Value Range: 0~1, step:0.01 Unit: % Default Value: 95

UlTotalEqUserNum BSC6900


Meaning: When the algorithm 2 is used, this parameter defines the total equivalent user numbers corresponding to the 100% uplink load. The




Issue 04 (2010-12-20)

Parameter ID NE MML Command Meaning parameter should be related to the admission threshold and actual condition of the network. GUI Value Range: 1~200 Actual Value Range: 1~200 Unit: None Default Value: 95

WCDMA RAN Call Admission Control 5 Counters


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5 Counters For details, see the BSC6900 UMTS Performance Counter Reference.

WCDMA RAN Call Admission Control 6 Glossary


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

WCDMA RAN Call Admission Control 7 Reference Documents


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7 Reference Documents [1] Load Control Feature Parameter Description [2] HSDPA Feature Parameter Description [3] Transmission Resource Management Feature Parameter Description [4] Radio Bearer Feature Parameter Description [5] MBMS Feature Parameter Description

Download - 30May2012 Call Admission Control

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