OWO116080 WCDMA RAN14 Admission Control Algorithm and Parameters ISSUE1.00

Slide 0

Page0Revision RecordDont Print This PageCourse CodeProductProduct VersionCourse Version ISSUEOWO116080 WRAN RNORAN14 FeatureVersion 1.00Developer/ModifierTimeApproverNew/UpdateGongyuewx488712012-9Lizhihai 131679NewCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:

:20-22pt (2-5) :18pt : :FrutigerNext LT Regular : Arial

:18-20pt(2-5):18pt ::

13

.

1170%1.25 3Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersWCDMA RAN14 Admission Control Algorithm and Parameterswww.huawei.comCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :40-47pt :26-30pt: :FrutigerNext LT Medium : Arial

:35-47pt: :24-28pt::

Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage2ForewordThe WCDMA system is a self-interfering system, so the capacity, coverage, and QoS are mutually affectedThe target of load control is to maximize the system capacity while ensuring coverage and QoS, and provide differentiated services for users


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

The WCDMA system is a self-interfering system. As the load of the system increases, the interference rises. A relatively high interference can affect the coverage of cells and QoS of established services. Therefore, the capacity, coverage, and QoS of the WCDMA system are mutually affected. To solve these problems, the load control function is introduced that controls the load in a cell.Load control aims to maximize the system capacity while ensuring coverage and QoS by controlling the key resources, such as power, downlink channelization codes, channel elements (CEs), and Iub transmission resource, which directly affect user experience.Each cell has its own set of load control functions that are responsible for monitoring and controlling the resources of the cell. The load control functions monitor the load condition of the cell through load measurement, make the admission decision for services through intelligent access control and call admission control, and relieve congestion in a cellConfidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage3References3GPP TS 25.133: Requirements for Support of Radio Resource Management (FDD)3GPP TS 25.215: Physical Layer - Measurements (FDD)3GPP TS 25.304: UE Procedures in Idle Mode and Procedures for Cell Reselection in Connected Mode3GPP TS 25.321: Medium Access Control (MAC) Protocol Specification3GPP TS 25.331: Radio Resource Control (RRC)3GPP TS 25.413: UTRAN Iu Interface RANAP Signaling


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage4ObjectivesUpon completion of this course, you will be able to:Outline the principle of load control Describe the realization method of Call Admission ControlDescribe the realization method of Intelligent Access ControlPerform the parameter adjustment of Call Admission ControlPerform the parameter adjustment of Intelligent Access Control


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage5ContentsLoad Control OverviewCAC Algorithm and ParametersIAC Algorithm and Parameters


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage6ContentsLoad Control Overview1.1 Load Control Algorithms Overview1.2 Load Measurement1.3 Priorities Involved in Load Control


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage7Load DefinitionLoad: the occupancy of capacityTwo kinds of capacity in WCDMA system:Hard capacity:Cell DL OVSF codeIub transport resourceNodeB processing capability (NodeB credit)Soft capacity:Cell power (UL and DL)Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

WCDMA network load can be defined by four factors:Power, includes DL transmitting power of cell and increased UL interference (RTWP)DL OVSF code of a cell.DL and UL NodeB processing capability which is defined by NodeB credit.Iub transmission bandwidth of a NodeB.The power resource is related to the mobility, distribution of the UE and also effected by the radio conditions. Therefore, for a fixed power resource, the numbers of service can be supported is not a fix result. We believe the UL and DL power resources are soft.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage8Load Control AlgorithmsThe load control algorithms are applied to the different UE access phases as follows:

CAC: Call Admission Control IAC: Intelligent Access Control LDR: Load Reshuffling OLC: Overload Control


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

In addition, functional load control algorithms vary depending on the load levels of the cell, as shown in the following figure:

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage9Load Control Algorithms (Cont.)Load Control AlgorithmResourcesPowerCodeNodeB CreditsIub BandwidthIACCACLDROLC--: not considered; : consideredResources considered by different load control algorithms: Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage10ContentsLoad Control Overview1.1 Load Control Algorithms Overview1.2 Load Measurement1.3 Priorities Involved in Load Control


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage11Load MeasurementLoad control function in the WCDMA system:


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

The load control functions, such as OLC and CAC, use load measurement values in the uplink and the downlink. A common Load Measurement (LDM) function is used to control load measurement in the uplink and the downlink separately.Load control is implemented in the RNC after obtaining measurement reports from the NodeBs.The load control functions are described as follows:CACThe function of CAC is to decide whether to accept resource requests from UEs, such as access, reconfiguration, and handover requests, depending on the resource status of the cell.IACThe function of IAC is to increase the access success rate with the current QoS guaranteed through rate negotiation, queuing, preemption, and directed retry decision (DRD). LDRThe function of LDR is to reduce the cell load when the cell enters the basic congestion state. OLCThe function of OLC is to reduce the cell load rapidly when the cell is overloaded.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage12Load Measurement QuantitiesThe major load-related measurement quantities are as follows: Uplink Received Total Wideband Power (RTWP)Downlink Transmitted Carrier Power (TCP)Non-HSPA power: TCP excluding the power used for transmission on HSPA channelsProvided Bit Rate (PBR) on HS-DSCH.Power Requirement for GBR (GBP) on HS-DSCHPBR on E-DCHCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersLoad Measurement Quantities (Cont.)Received Scheduled E-DCH Power Share (RSEPS): power of the E-DCH scheduling service in the serving cell Uplink total load: sum of R99 service load, HSUPA service load, and control channel loadUplink minimum guaranteed load: sum of R99 service load, HSUPA service load required by the HSUPA GBR, and control channel load.The HSUPA GBR is calculated as follows: If the function uplink enhanced L2 is disabled, GBR = max (bit rate of one RLC PDU, GBR). If the function uplink enhanced L2 is enabled, GBR = max (bit rate of the smallest RLC PDU, GBR).

Page13Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

The NodeB measures the major quantities related to load control. After layer 1 and layer 3 filtering, the measurement values are reported to the RNC through the COMMON MEASUREMENT REPORT message.The RNC performs smooth filtering of the measurement values reported from the NodeB and then obtains the measurement values, which further serve as data input for the load control algorithms.The RNC calculates the actual uplink load based on the RTWP, uplink total load, and uplink minimum guaranteed load. The actual uplink load is one of the factors for the uplink load-related algorithms.

WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission Page14Reporting PeriodThe NodeB periodically reports each measurement quantity to the RNC. The following table lists the reporting period parameters for setting different measurement quantities :Measurement QuantityReporting Period ParameterRTWPChoiceRprtUnitForUlBasicMeasTenMsecForUlBasicMeasMinForUlBasicMeasChoiceRprtUnitForDlBasicMeasTenMsecForDlBasicMeasMinForDlBasicMeasRSEPSTCPNon-HSDPA powerUplink total loadUplink minimum guaranteed loadCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

Set the above parameters through SET ULDM.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersReporting Period (Cont.)Measurement QuantityReporting Period ParameterGBPChoiceRprtUnitForHsdpaPwrMeasTenMsecForHsdpaPwrMeasMinForHsdpaPwrMeasHS-DSCH PBRChoiceRprtUnitForHsdpaRateMeasTenMsecForHsdpaPrvidRateMeasMinForHsdpaPrvidRateMeasE-DCH PBRChoiceRprtUnitForHsupaRateMeasTenMsecForHsupaPrvidRateMeasMinForHsupaPrvidRateMeasPage15Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

Set the above parameters through SET ULDM.

WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission Page16ContentsLoad Control Overview1.1 Load Control Algorithms Overview1.2 Load Measurement1.3 Priorities Involved in Load Control


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage17PriorityThe QoS of the services or users with low priority will be affected by the load control algorithms first

Three kinds of priorities involved in load control:User priorityRAB integrated priorityUser integrated priority


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

User priority: mainly applying to provide different QoS for different users. Eg., setting different GBR according to the user priority for BE service. No consideration about the service.RAB integrated priority: priority of a service, related to the service type, and the user priority of the user.User integrated priority: only used for multi-RAB user, it is a temporary priority of an ongoing-service user.Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage18User PriorityThere are three levels of user priority:gold (high priority), silver (middle priority) and copper (low priority) usersUser priorityGoldSilverCopperUplink384kbps128kbps64kbpsDownlink384kbps128kbps64kbpsgold user


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

In CN HLR, operator can set ARP (Allocation Retention Priority ). During service setup, CN sends ARP to RNC. Based on the mapping relation (configured in RNC), RNC can identify the users priority, namely gold, silver or copper one.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage19User Priority (Cont.)The mapping relation between user priority and ARP is configured in RNC by SET UUSERPRIORITYTypical relation between user priority and ARP:

ARP12345678User PriorityGoldGoldGoldGoldGoldSilverSilverSilverARP9101112131415User PrioritySilverSilverCopperCopperCopperCopperCopperCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

User priorities are adopted to provide differentiated services for users. For ease of application, the RNC maps the 15 levels of Allocation/Retention Priority (ARP) that is carried in the RAB ASSIGNMENT REQUEST message from the core network (CN) onto three user priorities, that is, gold (high priority), silver (medium priority), and copper (low priority). The relation between user priority and ARP can be set through SET UUSERPRIORITY command. If ARP is not received in messages from the Iu interface, the user priority is regarded as copper.Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage20RAB Integrated PriorityRAB integrated priority is mainly used in load control algorithms

RAB integrated priority are set according to :ARP Traffic ClassTraffic Handling Priority (THP, only for interactive services) Carrier types: HSPA or DCH


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

The values of RAB integrated priority are set according to the integrated priority configuration reference parameter (PriorityReference):If PriorityReference is set to ARP, the integrated priority abides by the following rules:ARP: ARP1 > ARP2 > ARP3 > ... > ARP14 >ARP15Services of the same ARP: priority based on traffic classes, that is, conversational > streaming > interactive > backgroundOnly for the interactive service of the same ARP value: priority based on Traffic Handling Priority (THP), that is, THP1 > THP2 > THP3 > ... > THP14 > THP15Services of the same ARP, traffic class and THP (only for interactive services): HSPA or DCH service preferred depending on CarrierTypePriorInd.If PriorityReference is set to Traffic Class, the integrated priority abides by the following rules:Traffic classes: conversational > streaming > interactive > background Services of the same traffic class: priority based on ARP, that is, ARP1 > ARP2 > ARP3 > ... > ARP14 > ARP15Only for the interactive service of the same ARP : priority based on Traffic Handling Priority (THP) that is carried in the RAB ASSIGNMENT REQUEST message, that is, THP1 > THP2 > THP3 > ... > THP14 > THP15Services of the same traffic class, ARP and THP (only for interactive services): High Speed Packet Access (HSPA) or Dedicated Channel (DCH) service preferred depending on CarrierTypePriorInd.Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage21An Example for RAB Integrated PriorityService IDARPTraffic ClassBear typeA1InteractiveDCHB1InteractiveHSDPAC2ConversationalDCHD2BackgroundDCHServices attribution in the cellBased on ARP, HSPA priority is higherBased on Traffic Class, HSPA priority is higherService IDARPTraffic ClassBear typeB1InteractiveHSDPAA1InteractiveDCHC2ConversationalDCHD2BackgroundDCHService IDTraffic ClassARPBear typeCConversational2DCHBInteractive1HSDPAAInteractive1DCHDBackground2DCHCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

This example shows the RAB integrated priority calculation in 2 different conditions.Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage22User Integrated PriorityFor single-RAB user, the user integrated priority is the same as the RAB integrated priority

For multiple-RAB user, the user integrated priority is based on the highest priority of RABCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

A user may have multiple RABs, and the RABs may have different priorities. In this case, the highest priority is taken as the priority of this user. Such a priority is called user integrated priority. User integrated priority is used in user-specific load control. For example, the selection of R99 users during preemption, the selection of users during inter-frequency load handover for LDR, and the selection of users during switching of BE services to common channels are performed according to the user integrated priority. Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage23Parameters of PriorityPriorityReference Parameter name: Integrate Priority Configured Reference Recommended value: ARPCarrierTypePriorInd Parameter name: Indicator of Carrier Type Priority Recommended value: NONE Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

PriorityReference Content: Reference used to determine which priority is arranged first in the priority sequence. If the ARP is preferably used, the priority sequence is gold > silver > copper. If the ARPs are all the same, the TrafficClass is used and the priority sequence is conversational > streaming > interactive > background.If the TrafficClass is preferably used, the priority sequence is conversational > streaming > interactive > background. If the TrafficClass factors are all the same, the ARP factor is used and the priority sequence is gold > silver > copper. Value range: ARP, TrafficClass Physical value range: ARP, TrafficClass CarrierTypePriorInd Content: Decide which carrier is prior when ARP and TrafficClass are both identical. Value range: NONE, DCH, HSPA Physical value range: NONE, DCH, HSPA Set these parameters through SET UUSERPRIORITY. Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage24ContentsLoad Control OverviewCAC Algorithm and ParametersIAC Algorithm and Parameters


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage25ContentsCAC (Call Admission Control)2.1 CAC Overview2.2 CAC Based on Code Resource 2.3 CAC Based on Power Resource 2.4 CAC Based on NodeB Credit Resource 2.5 CAC Based on Iub Resource 2.6 CAC Based on the Number of HSPA Users


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage26Why We Need CAC?WCDMA is an interference limited system, after a new service is admitted, the system load will be increasedIf a cell is high loaded, a new service will affect the QoS of ongoing user, even result in call dropCAC is used to determine whether the system resources are sufficient to accept a new user's access request or not Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

CAC is needed under such scenarios:RRC connection setup request RAB admission decision HandoverRate reconfiguration

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage27CAC Procedure


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

The admission decision is based on:Available cell code resourceAvailable cell power resourceNodeB credits, which are used to measure the channel demodulation capability of NodeBsAvailable Iub transmission bandwidthNumber 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. Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersHSPA Admission ControlHSPA admission control enables the HSDPA service along with other R99 services to access the networkHSDPA admission control based on: The number of HSDPA usersIub resourceHSUPA admission control based on:The number of HSUPA usersIub resourceNodeB credit resources


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

HSDPA admission control is described in this document, along with R99 admission control.Code resource-based admission is mandatory when a non-HSDPA service attempts to access the network.

WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission Page29CAC Algorithm Switches Power CACUplink CAC algorithm switch: ALGORITHM_SECOND Downlink CAC algorithm switch: ALGORITHM_FIRST NodeB credit CACCAC algorithm switch: ONCell CAC algorithm switch-CRD_ADCTRL: ON HSDPA user number CAC Cell CAC algorithm switch-HSDPA_UU_ADCTRL: OFFHSUPA user number CACCell CAC algorithm switch-HSUPA_UU_ADCTRL: OFFCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

Code and Iub resource-based admission control are mandatory and can not be disabled. Other admission control strategies may be enabled/disabled through the RNC command:The switch of power CAC can be set by ADD UCELLALGOSWITCH/ MOD UCELLALGOSWITCH:Uplink CAC algorithm switch (NBMUlCacAlgoSelSwitch) selects the algorithm used for power admission in the uplink. Downlink CAC algorithm switch (NBMDlCacAlgoSelSwitch) selects the algorithm used for power admission in the downlink. The switch of NodeB credit CAC can be set by SET UCACALGOSWITCH and ADD UCELLALGOSWITCH/ MOD UCELLALGOSWITCH:CAC algorithm switch (CacSwitch) specifies whether to enable or disable the NodeB level credit CAC algorithm.Cell CAC algorithm switch (CRD_ADCTRL) specifies whether to enable or disable the cell level credit CAC algorithm.The switch of HSDPA user number CAC can be set by ADD UCELLALGOSWITCH/ MOD UCELLALGOSWITCH:Cell CAC algorithm switch (HSDPA_UU_ADCTRL) specifies whether to enable or disable the HSDPA user number admission control algorithm. The switch of HSUPA user number CAC can be set by ADD UCELLALGOSWITCH/ MOD UCELLALGOSWITCH:Cell CAC algorithm switch (HSUPA_UU_ADCTRL) specifies whether to enable or disable the HSUPA user number admission control algorithm.Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage30ContentsCAC (Call Admission Control)2.1 CAC Overview2.2 CAC Based on Code Resource 2.3 CAC Based on Power Resource 2.4 CAC Based on NodeB Credit Resource 2.5 CAC Based on Iub Resource 2.6 CAC Based on the Number of HSPA Users


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage31CAC Based on Code Resource Code resource CAC is involved in:RRC connection setup Handover R99 services setup

RRC connection setup and handover have higher priorityCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

Code resource-based admission is mandatory when a non-HSDPA service attempts to access the network.For HSDPA services, the reserved codes are shared by all HSDPA services. Therefore, the code resource-based admission is not required.Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersCode CAC for RRC Connection SetupIf the RRCCeCodeCacChoice parameter is set to LOOSE_CAC:Code resource-based admission succeeds if the remaining code resources are sufficient for setting up an RRC connection.If the RRCCeCodeCacChoice parameter is set to STRICT_CAC:The RNC implements code resource-based admission based on the cause carried in the RRC connection setup request.


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

If the cause is "Emergency Call" or "Detach", code resource-based admission succeeds if the remaining code resources are sufficient.For any other cause, the RNC must ensure that the remaining codes (the remaining minimum SF of the current cell) do not exceed the reserved minimum spreading factor (SF) for an RRC connection upon admitting an RRC connection setup request. The reserved minimum SF is specified by the DlRRCCeCodeResvSf parameter.

WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission Code CAC for HandoverFor handover service requests, code resource-based admission succeeds if the remaining code resources are sufficient for the service to be admitted.


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission Code CAC for PS /CS Service (Non-AMR Service)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 the threshold.It is specified by the DlHoCeCodeResvSf parameter.


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission Code CAC for AMR ServiceFor AMR service requests If the CSRABCacOptSwitch parameter is set to OFF 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 the DlHoCeCodeResvSf parameter. If the CSRABCacOptSwitch parameter is set to ON, Code resource-based admission succeeds if the remaining code resources are sufficient for the service to be admitted


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission Page36Parameter of CAC Based on Code Resource RRCCeCodeCacChoiceParameter name: Credit and Code CAC Choice for RRC Recommended value: LOOSE_CACCSRABCacOptSwitchParameter name: CS RAB Setup Resource Allocation SwitchRecommended value: OFF


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

RRCCeCodeCacChoiceContent: RRC connection admission control (CAC) mode. When this parameter is set to LOOSE_CAC, the original RRC admission threshold remains unchanged. When this parameter is set to STRICT_CAC, the RRC admission threshold equals the RAB admission threshold plus the RRC admission threshold offset for the corresponding service.Value range: LOOSE_CAC, STRICT_CACCSRABCacOptSwitchContent: Whether resource allocation is optimized during CS RAB setups. When this parameter is set to ON, the RNC allocates power resources, code resources, channel element (CE) resources during CS RAB setups based on the loose CAC algorithm. This setting increases the CS service setup success rate. When this parameter is set to OFF, the RNC does not allocate resources during CS RAB setups based on the loose CAC algorithm.Value range: OFF, ONSet this parameter through ADD UCELLALGOSWITCH/MOD UCELLALGOSWITCH

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage37Parameter of CAC Based on Code Resource (Cont.)DlHoCeCodeResvSfParameter name: DL handover credit and code reserved SF Recommended value: SF32


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

DlHoCeCodeResvSfContent: 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 is reserved. SF32 refers to that a code resource with SF = 32 and its corresponding credit resource are reserved. The backer position the value is in {SF4, SF8, SF16, SF32, SF64, SF128, SF256, SFOFF}, the less code and credit resources reserved for handover UEs. The possibility of rejecting handover UE admissions increases and performance of UEs cannot be guaranteed. The more frontal position the value is, the more the possibility of rejecting new UEs is and some idle resources are wasted.Value range: SF4, SF8, SF16, SF32, SF64, SF128, SF256, SFOFF Physical value range: SF4, SF8, SF16, SF32, SF64, SF128, SF256, SFOFF Set this parameter through ADD UCELLCAC/ MOD UCELLCAC.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage38ContentsCAC (Call Admission Control)2.1 CAC Overview2.2 CAC Based on Code Resource 2.3 CAC Based on Power Resource 2.4 CAC Based on NodeB Credit Resource 2.5 CAC Based on Iub Resource 2.6 CAC Based on the Number of HSPA Users


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage39CAC Based on Power Resource Power resource CAC is involved in:

RRC connection setup Handover Services setup

RRC connection setup and handover have higher priorityCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

The power CAC involves uplink admission control and downlink admission control. The corresponding admission control switches NBMUlCacAlgoSelSwitch or NBMDlCacAlgoSelSwitch are independent of each other.To enable power-based admission control for HSDPA or HSUPA services, select HSDPA_UU_ADCTRL or HSUPA_UU_ADCTRL under the NBMCacAlgoSwitch parameter.Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage40Power CAC Procedure


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

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, both uplink and downlink admission control are required.Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage41Power CAC AlgorithmsAlgorithm 1: based on the cell power load and the expected load increase

Algorithm 2: based on Equivalent Number of User (ENU)Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

Algorithm 1 (ALGORITHM_FIRST): admission control based on the cell power load and the expected load increase caused by a new serviceDepending on the current cell power load, the RNC determines whether the cell load will exceed the threshold upon admitting the new service. If the cell load exceeds the threshold, the RNC rejects the access 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 ENU will exceed the threshold upon admitting the new service. If the ENU exceeds the threshold, the RNC rejects the access request. Otherwise, the RNC admits the service.Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage42Power CAC Algorithms (Cont.)Algorithm 3: admission control without considering load increase

Algorithm 4: based on the uplink actual power load and the expected load increaseCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

Algorithm 3 (ALGORITHM_THIRD): admission control without considering load increase caused by a new serviceThis 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 load exceeds the threshold, the RNC rejects the access request. Otherwise, the RNC admits the service.Algorithm 4 (ALGORITHM_FOURTH): admission control based on the uplink actual power load and the expected load increase caused by a new service.Depending on the current uplink actual power load, the RNC determines whether the cell load will exceed the threshold after admitting the new service. If the cell load exceeds the threshold, the RNC rejects the access request. Otherwise, the RNC accepts the service.Algorithm 4 applies only to admission control in the uplink. Admission control in the downlink can use only algorithm 1, 2, or 3.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage43Power CAC for RRC Connection SetupThe RNC performs loose or strict admission control on RRC connection setup requests.

The RRCCacChoice parameter specifies whether to use loose or strict admission control.Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

RRCCacChoiceParameter Name: Power CAC Choice for RRCContent: RRC connection admission control (CAC) mode. When this parameter is set to LOOSE_CAC, RRC connection admission adopts a loose admission threshold. When this parameter is set to STRICT_CAC, the RRC admission threshold equals the RAB admission threshold plus the RRC admission threshold offset for the corresponding service.Value range: LOOSE_CAC, STRICT_CACRecommended Value: LOOSE_CACSet this parameter through ADD UCELLALGOSWITCH/MOD UCELLALGOSWITCH.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPower CAC for RRC Connection Setup (Cont.)Loose Admission ControlIf an RRC connection setup request comes from emergency calls, detachments, or registrations, the RRC connection is set up directly.If an RRC connection setup request comes from other services, admission control is performed base on UL_UU_OLC or DL_UU_OLC parameters value.Page44Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

When UL_UU_OLC or DL_UU_OLC under the NBMLdcAlgoSwitch parameter 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 (UlOlcTrigThd or DlOlcTrigThd) is used for admission control.When UL_UU_OLC or DL_UU_OLC is set to 0, the uplink or downlink OLC triggering threshold (UlOlcTrigThd or DlOlcTrigThd) is used for admission control.

WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission Power CAC for RRC Connection Setup (Cont.)Strict Admission ControlIf an RRC connection setup request comes from emergency calls or detachments, the RRC connection is set up directly.If an RRC connection setup request comes from other services, the RNC determines the admission threshold based on one of the following request causes:RRC connection setup requests of real-time servicesRRC connection setup requests of non-real-time servicesRRC connection setup requests of other services


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

Other services is 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-time services(RTRRCCacThdOffset) + UlNonCtrlThdForAMR (for the uplink) or DlConvAMRThd (for the downlink)Admission threshold for RRC of non-real-time services = Admission threshold offset for RRC of non-real-time services (NRTRRCCacThdOffset) + UlNonCtrlThdForOther (for the uplink) or DlOtherThd (for the downlink)Admission threshold for RRC of other services = Admission threshold offset for RRC of other services (OtherRRCCacThdOffset) + UlOlcTrigThd (for the uplink) or DlOlcTrigThd (for the downlink)

WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission Page46Power-Based Admission Algorithm 1 for RAB Setup There are two types of power-based admission decisions based on algorithm 1:Uplink admission decision:R99 cellHSPA cellDownlink admission decision:R99 cellHSPA cellCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersAlgorithm 1 - Uplink for R99 CellIn an R99 cell, uplink power-based admission decisions are made according to the RTWP-based total uplink load. It is represented by UL,R99-Total and calculated using the following formula:UL,R99-Total = 1 PN/(RTWP + UL,CCH)PN is the received uplink background noiseRTWP is the received total wideband power in the uplinkUL,CCH is the reserved load on the uplink common channelsPage47Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

Upon receiving a service access request, the RNC makes the uplink power-based admission decision for an R99 service. The procedure is as follows:The RNC calculates the uplink load increase (UL) based on the initial admission rate of the service. If the sum of the RTWP-based total uplink load (UL,R99-Total) and the load increase caused by the new service (UL) is lower than or equal to the corresponding admission threshold,the RNC admits the service. Otherwise, the RNC performs the next step. The RNC checks whether the control RTWP anti-interference function switch (RTWP_RESIST_DISTURB under the NBMCacAlgoSwitch parameter) is turned on. If it is turned on, the RNC checks whether the total uplink load of ENU on the cell is lower than CellUlEquNumCapacity. If it is lower than CellUlEquNumCapacity, the RNC admits the service. Otherwise, the RNC rejects the access request. WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission Page48Parameters of Power CACCellUlEquNumCapacityParameter name: Cell Uplink Capacity of Equal User NumberRecommended value: 40, namely 40%UlNonCtrlThdForHo/UlNonCtrlThdForAMR/UlNonCtrlThdForNonAMR/UlNonCtrlThdForOtherParameter name: UL threshold of handover/Conv AMR/Conv non_AMR/other service Recommended value: 80%, 75%, 75%, 60%Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

CellUlEquNumCapacityContent: Used to check whether the uplink load is overlarge in a cell. If the uplink load in the cell is greater than this parameter, the uplink load will be judged as overlarge, Otherwise the uplink load will not be judged as overlarge. If the uplink load is not overlarge, and the switch of RTWP anti-interference algorithm is enabled, the RTWP anti-interference algorithm is validated. Admission requests will be accepted even when the RTWP value is great, and related OLC operations will be cancelled.Value range: 0~100 Physical unit: %UlNonCtrlThdForHo/ UlNonCtrlThdForAMR/ UlNonCtrlThdForNonAMR/ UlNonCtrlThdForOtherImpact on Network Performance: If the value is too high the system load after admission may be over large, which impacts system stability and leads to system congestion. If the value is too low, the possibility of user rejects may increase, resulting in waste in idle resources.Value range: 0~100 Physical value range: 0~1; step: 0.01 Physical unit: %Set these parameters through ADD UCELLCAC/ MOD UCELLCAC.Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage49Algorithm 1 - Uplink for HSPA CellIn an HSPA cell, uplink power-based admission decisions are made based on the following load measurements:The RTWP-based total uplink load:UL,HSUPA-Total = 1 PN/(RTWP + UL,CCH + HS-DPCCH)The uncontrollable uplink load:UL,NonCtrl = UL,HSUPA-Total UL,CtrlThe total uplink load for preferential admission of R99 services:UL,R99Prefer-Total = UL,NonCtrl + ThdHSUPAMaxGBP + UL,CCH + HS-DPCCH


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

Where HS-DPCCH is the reserved load for the uplink HS-DPCCH. It is set by the UlHsDpcchRsvdFactor parameterWhere UL,Ctrl is the controllable uplink load and equals the received scheduled E-DCH power share (RSEPS). Where ThdHSUPAMaxGBP is the maximum guaranteed load threshold for HSUPA services when the RNC makes an admission decision on an R99 service. It is set by the HsupaMaxGBPThd parameter.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage50Algorithm 1 - Uplink for HSPA CellRNC performs the uplink power-based admission decision as follows:The RNC calculates the uplink load increase (UL) based on the initial admission rate of the service.The RNC determines whether to admit the service.The admission criteria vary with the bearer type in an HSPA cell.Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

The RNC checks whether the control RTWP anti-interference function switch (RTWP_RESIST_DISTURB under the NBMCacAlgoSwitch parameter) is turned on. If it is turned on, the RNC checks whether the total uplink load of ENU on the cell is lower than CellUlEquNumCapacity. If it is lower than CellUlEquNumCapacity, the RNC admits the service. Otherwise, the RNC rejects the access request. Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersFor the DCH RABIf the bearer type is the DCH RAB, a service is admitted only when the following criteria are both met:UL,NonCtrl + UL ThdSuch as:UlNonCtrlThdForAMR, UlNonCtrlThdForNonAMR, UlNonCtrlThdForOther, or UlNonCtrlThdForHo UL,HSUPA-Total + UL UlCellTotalThd or UL,R99Prefer-Total + UL UlCellTotalThd


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission For the DCH RAB (Cont.)UlCellTotalThdParameter Name: UL total power thresholdRecommended Value: 83 namely 83%


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

UlCellTotalThdContent: Admission threshold of total cell uplink power. This parameter is related to the target load of the uplink schedule.Value Range: 0~100Unit: %Set this parameter through ADD UCELLCAC/ MOD UCELLCAC.

WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission For the HSUPA RABIf the bearer type is the HSUPA RAB, the RNC admits an HSUPA service if either PBR-based admission decision or load-based admission succeeds.Page53Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission For the HSUPA RAB (Cont.)PBR-based admission decisionsPBR-based service admission succeeds if any of the following criteria are met:

Page54


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

The uplink provided bit rate (PBR) is the effective uplink throughput on all UEs corresponding to a scheduling priority indicator (SPI) successfully received by the NodeB. PBR is reported by the NodeB to the RNC periodically.The RNC performs PBR-based admission control only when the HSUPA PBR measurement switch is turned on (HSUPA_PBR_MEAS under the NBMCacAlgoSwitch parameter is set to 1). If the sum of PBRs of some UEs is larger than the sum of their GBRs multiplied by a certain factor, the RNC decides that the QoS requirements of the cell are met. In this case, the RNC can admit new services.WhereThdL is the PBR threshold (HsupaLowPriorityUserPBRThd) for all HSUPA users whose scheduling priorities are lower than the priority of users to be admitted.ThdE is the PBR threshold (HsupaEqualPriorityUserPBRThd) for all HSUPA users whose scheduling priorities are equal to the priority of users to be admitted.ThdGE is the PBR threshold (HsupaHighPriorityUserPBRThd) for all HSUPA users whose scheduling priorities are higher than the priority of users to be admitted.

WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission Page55For the HSUPA RAB (Cont.)Load-based admission decisionsFor HSUPA scheduling service admission succeeds if the following criteria is met UL,HSUPA-Total + UL UlCellTotalThdFor HSUPA non-scheduling services admission succeeds only when both of the following criteria are met: UL,HSUPA-Total + UL UlCellTotalThdUL,NonCtrl + UL ThdSuch as:UlNonCtrlThdForAMR, UlNonCtrlThdForNonAMR, UlNonCtrlThdForOther, or UlNonCtrlThdForHoCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage56For the DC-HSUPA RABFor DC-HSUPA non-scheduling services Load-based admission decisions are made only on the primary carrier. For DC-HSUPA scheduling serviceLoad-based admission decision is successful on the primary or secondary carrier.Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

If the bearer type is the DC-HSUPA RABs, the RNC admits a DC-HSUPA service only the load-based admission succeeds.For DC-HSUPA non-scheduling services, the admission method is the same as that for common HSUPA non-scheduling services.For DC-HSUPA scheduling servicethe admission decision method is the same as that for a common HSUPA scheduling service. UL,HSUPA-Total + UL UlCellTotalThdWhere UL: load increase after admitting the DC-HSUPA scheduling service .

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage57Parameters of Power CACUlHsDpcchRsvdFactorParameter name: UL HS-DPCCH reserve factor Recommended value: 0, namely 0%HsupaMaxGBPThd Parameter name: Threshold of Maximum Guaranteed Bit Rates for HSUPARecommended value: 100, namely 100%Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

UlHsDpcchRsvdFactorContent: If the HS-DPCCH carries ACK/NACK, the system will not perform CAC. If the HS-DPCCH carries CQI, the system will perform CAC. This parameter refers to the resources reserved for the uplink HS-DPCCH carrying ACK/NACK. The corresponding threshold is the uplink limit capacity multiplied by this parameter. If the value is too high, the possibility of wrong rejection to uplink admissions increases, leading to waste in uplink resources. If the value is too low, the uplink resources is insufficient. However, because the possibility of burst load by ACK/NACK and its impact are relatively low, the value can be set to a low level, representing the loose admission rule. Value range: 0~100 Physical value range: 0~1; step: 0.01 Physical unit: %HsupaMaxGBPThd Content: 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.Value range: 0~100 Physical value range: 0~1; Physical unit: %Set these parameters through ADD UCELLCAC/ MOD UCELLCAC.Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage58Parameters of Power CAC (Cont.)HsupaLowPriorityUserPBRThdHsupaEqualPriorityUserPBRThdHsupaHighPriorityUserPBRThdParameter name: Low/Equal/High priority HSUPA user PBR threshold Recommended value: 100%, 100%, 100%Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

HsupaLowPriorityUserPBRThd/ HsupaEqualPriorityUserPBRThd/ HsupaHighPriorityUserPBRThd Content: Threshold of all the HSUPA user PBR whose schedule priority is lower/equal/higher than that of users to be admitted. If this value is too high, the possibility of rejecting HSUPA schedule services increases, which impacts access success rate. If the value is too low, too many HSUPA schedule users may be admitted, which impacts the admitted users and results in overload and system congestion. Value range: 0~100 Physical value range: 0~1; step: 0.01 Physical unit: %Set these parameters through ADD UCELLCAC/ MOD UCELLCAC.Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersAlgorithm 1 - Downlink for R99 CellIn an R99 cell, downlink power-based admission decisions are made according to the TCP-based total downlink load. It is represented by DL,R99-Total and calculated using the following formula:DL,R99-Total = TCP + DL,CCHTCP is equal to the transmitted carrier power (TCP)DL,CCH is the reserved load on the downlink common channelsPage59Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

TCP is equal to the transmitted carrier power (TCP), which is the ratio of the total transmitted power on one downlink carrier to the maximum transmission power (set by the MaxTxPower parameter).DL,CCH is the reserved load on the downlink common channels. It is set by the DlCCHLoadRsrvCoeff parameter.Upon receiving a service access request, the RNC makes the downlink power-based admission decision for an R99 service. The procedure is as follows: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.If the TCP-based total downlink load (DL,R99-Total) is lower than or equal to the corresponding admission threshold (DlConvAMRThd, DlConvNonAMRThd, DlOtherThd, or DlHOThd), the RNC admits the service. Otherwise, the RNC rejects the service.

WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission Page60Parameters of Power CAC (Cont.)DlCCHLoadRsrvCoeff Parameter name: DL common channel load reserved coefficient Recommended value: 0, namely 0%DlHOThd/DlConvAMRThd/DlConvNonAMRThd/DlOtherThdParameter name: DL threshold of handover/Conv AMR/Conv non_AMR/other service Recommended value: 85%, 80%, 80%, 75%Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

DlCCHLoadRsrvCoeffContent: 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. Value range: 0~100 Physical value range: 0~1; step: 0.01 Physical unit: %DlHOThd/ DlConvAMRThd/ DlConvNonAMRThd/ DlOtherThdContent: The percentage of the handover/conversational AMR/conversational non-AMR/other service thresholds to the 100% downlink load. It is applicable to algorithm 1 and algorithm 2. If the value is too high the system load after admission may be over large, which impacts system stability and leads to system congestion. If the value is too low, the possibility of user rejects may increase, resulting in waste in idle resources and the failure to achieving network planning target. Value range: 0~100 Physical value range: 0~1; step: 0.01 Physical unit: %Set these parameters through ADD UCELLCAC/ MOD UCELLCAC.Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage61Algorithm 1 - Downlink for HSPA CellIn an HSPA cell, downlink power-based admission decisions are made based on the following load measurements:TCP-based total downlink loadDL,HSDPA-Total = TCP + DL,CCH + DL,HSUPAResHSDPA GBP-based total downlink loadDL,GBP-Total = DL,NonHSPA + min (DL,GBP + DL,HSUPARes, DL,MaxHSPA) + DL,CCHThe total downlink load for preferential admission of R99 servicesDL,R99Prefer-Total = DL,NonHSPA + ThdHSDPAMaxGBP + DL,HSUPARes + DL,CCH


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

DL,HSUPARes is the power load reserved for HSUPA downlink control channels (E-AGCH/E-RGCH/E-HICH). It is set by the DlHSUPARsvdFactor parameter. 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."DL,MaxHSPA is the threshold for the maximum available HSDPA power. It is calculated based on the HspaPower parameter.DL,NonHSPA is the downlink non-HSPA power load for 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 the MaxTxPower parameter). ThdHSDPAMaxGBP is the maximum guaranteed load threshold for HSDPA services when the RNC makes an admission decision on an R99 service. It is set by the HsdpaMaxGBPThd parameter.Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersAlgorithm 1 - Downlink for HSPA CellRNC performs the downlink power-based admission decision as follows: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.The RNC determines whether to admit the service. The admission criteria vary with the bearer type in an HSPA cell.


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission Page63For the DCH RABIf the bearer type is the DCH RAB, a service is admitted only when the following criteria are both met:DL,NonHSPA + UL ThdSuch as:DlConvAMRThd, DlConvNonAMRThd, DlOtherThd, or DlHOThd DL,HSDPA-Total + UL DlCellTotalThdor DL,GBP-Total + UL DlCellTotalThdor DL,R99Prefer-Total + UL DlCellTotalThd


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

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

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersFor the DCH RAB (Cont.)DlCellTotalThdParameter name: DL total power thresholdRecommended value: 90, namely 90%


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

DlCellTotalThdContent: 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. Value range: 0~100 Physical value range: 0~1; Physical unit: %

WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission For the HSDPA RABIf the bearer type is the HSDPA RAB, the RNC admits an HSDPA service if either PBR-based admission decision or load-based admission succeeds.Page65Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission For the HSDPA RAB (Cont.)PBR-based service admission succeeds if equation a (for streaming services) or equation b (for BE services) is satisfied:

a.

b.Page66


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

The RNC performs PBR-based admission control only when the HSDPA PBR measurement switch is turned on (HSDPA_PBR_MEAS under the NBMCacAlgoSwitch parameter is set to 1). If the sum of PBRs of some UEs is larger than the sum of their GBRs multiplied by a certain factor, the RNC decides that the QoS requirements of the cell are met. In this case, the RNC can admit new services.WherePBRstrm is the provided bit rate of all existing streaming services.Thdhsdpa-str is the admission threshold of the PBR-based decision for streaming services (HsdpaStrmPBRThd).PBRbe is the provided bit rate of all existing BE services.Thdhsdpa-be is the admission threshold of the PBR-based decision for BE services (HsdpaBePBRThd).

WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission Page67For the HSDPA RAB (Cont.)Load-based service admission succeeds only when both of the following criteria are met: DL,GBP + UL Pavailable-HSDPA DL,HSDPA-Total + UL DlCellTotalThd or DL,GBP-Total + UL DlCellTotalThdCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

DL,GBP is the sum of the HSDPA GBP load.DL is the load increase caused by the new service.Pavailable-HSDPA is the maximum available HSDPA power, which is equal to 110 (-HspaPower/10).DL,HSDPA-Total is the sum of the TCP-based total downlink load.DL,GBP-Total is the sum of the HSDPA GBP-based total downlink load.Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage68For the DC-HSDPA RABIf the bearer type is the DC-HSDPA RAB, admission control is based on the power of the DC-HSDPA cell group.The RNC admits DC-HSDPA RABs in the following situations:PBR-based service admission in the DC-HSDPA cell group succeedsLoad-based service admission in the DC-HSDPA cell group succeedsCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

PBR-based admission control in the DC-HSDPA cell group is similar to that in the SC-HSDPA cell. The difference between them is that users selected during an admission decision are DC-HSDPA users in the DC-HSDPA cell group, not SC-HSDPA users.This means that the total downlink load factor of the DC-HSDPA cell group is lower than the sum of the total downlink load threshold of the primary cell and that of the secondary cell.Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage69Parameters of Power CAC (Cont.)HsdpaStrmPBRThd Parameter name: HSDPA streaming PBR threshold Recommended value: 70, namely 70%HsdpaBePBRThd Parameter name: HSDPA best effort PBR threshold Recommended value: 30, namely 30%Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

HsdpaStrmPBRThd Content: 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.Value range: 0~100 Physical value range: 0~1Physical unit: %HsdpaBePBRThd Content: 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 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.Value range: 0~100 Physical value range: 0~1; step: 0.01 Physical unit: %Set these parameters through ADD UCELLCAC/ MOD UCELLCAC.Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage70Power-Based Admission Algorithm 2 for RAB Setup When the CAC function uses algorithm 2, the admission of uplink/downlink power resources uses the algorithm depending on the Equivalent Number of Users (ENU)Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

The ENU of MBMS downlink control channels (MICH and MCCH) is reserved. Therefore, power-based admission is not performed on these channels.The ENU of HSUPA downlink control channels (E-AGCH, E-RGCH, and E-HICH) is reserved by DlHSUPARsvdFactor. Therefore, power-based admission is not performed on these channels.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage71Equivalent Number of Users When the activation factor is 100%, a 12.2 kbit/s AMR service is defined as one ENU. The following aspects are considered when the ENU is calculated:Cell type, such as urban or suburbanTraffic QoS, which is the Block Error Rate (BLER)Target number of retransmissionsThe activity factor of the traffic typeCopyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

The following table describes the typical ENU :

In the previous table, for a 3.4+n kbit/s service of HSDPA, DC-HSDPA, or HSUPA:3.4 kbit/s is the rate of the signaling carried on the DCHn kbit/s is the GBR of the serviceConfidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersServiceENUUplink for DCHDownlink for DCHHSDPA2 ms TTI HSUPA10 ms TTI HSUPA3.4 kbit/s SIG0.28470.04200.02790.31070.136913.6 kbit/s SIG0.50570.11150.07380.360.16553.4 kbit/s + 12.2 kbit/s0.81960.5420-2.02421.08693.4 kbit/s + 8 kbit/s (PS)0.75480.10440.5453.50981.76113.4 kbit/s + 16 kbit/s (PS)0.65000.12480.87493.87131.97863.4 kbit/s + 32 kbit/s (PS)0.62280.21871.4634.58562.41063.4 kbit/s + 64 kbit/s (PS)0.75660.32522.55455.98063.26253.4 kbit/s + 128 kbit/s (PS)0.92480.59264.68518.64304.91923.4 kbit/s + 144 kbit/s (PS)1.03050.66155.22259.22795.24633.4 kbit/s + 256 kbit/s (PS)1.43991.04899.119313.10637.46983.4 kbit/s + 384 kbit/s (PS)2.11501.552313.933217.12279.8773Uplink ENU Resource Admission DecisionsIn the uplink, ENU-based admission decisions are made based on the following load measurements:Uplink total ENU loadUL,ENU = ENUUL,Total/ENUUL,Max + UL,CCHThe total uplink load of ENU for preferential admission of R99 servicesUL,R99Prefer-ENU = UL,DCH_ENU + Thd HSUPAMaxGBPPage72Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

ENUUL,Total is the sum of ENUs corresponding to the RABs in a cell.ENUUL,Max is the maximum ENU of a cell. It is set by the UlTotalEqUserNum parameter.UL,CCH is the reserved load on the uplink common channels. It is set by the UlCCHLoadFactor parameter.When the GBR for HSUPA services is too high, the total uplink load of ENU may also be too high, and therefore R99 service admission is difficult. In this case, UL,R99Prefer-ENU ensures that R99 services are preferentially admitted. UL,DCH_ENU is the ENU load of all DCH RABs in a cell. It is the ratio of the sum of ENUs for all DCH RABs to the maximum ENU in a cell (UlTotalEqUserNum).ThdHSUPAMaxGBP is the maximum guaranteed load threshold for HSUPA services when the RNC makes an admission decision on an R99 service. It is set by the HsupaMaxGBPThd parameter.

WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission Uplink ENU Resource Admission DecisionsIf a cell is in the OLC state triggered by the RTWP: UL,ENU CellUlEquNumCapacityIf a cell is not in the OLC stateIf the bearer type is the DCH RAB UL,ENU + UL,ENU THdOr UL,R99Prefer-ENU + UL,ENU UlCellTotalThdIf the bearer type is the HSUPA RAB UL,ENU + UL,ENU THdsuch as UlNonCtrlThdForAMR, UlNonCtrlThdForNonAMR, UlNonCtrlThdForOther or UlNonCtrlThdForHoPage73Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

UL,ENU is the sum of the uplink total ENU load .UL,ENU is the ENU load increase caused by the new service.UL,R99Prefer-ENU is the sum of the total uplink ENU load for preferential admission of R99 services .For DC-HSUPA RABsDC-HSUPA RABs are admitted only to the primary carrier. Admission control for DC-HSUPA RABs is the same as that for common HSUPA RABs.The ENU corresponding to the DC-HSUPA RABs is counted into the ENU load of the primary carrier.

WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission Downlink ENU Resource Admission DecisionsIn the downlink, ENU-based admission decisions are made based on the following load measurements:Downlink total ENU loadDL,ENU = ENUDL,Total/ENUDL,Max + DL,CCHThe total downlink load for preferential admission of R99 servicesDL,R99Prefer-ENU = DL,DCH_ENU + ThdHSDPAMaxGBP


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

ENUDL,Total is the sum of ENUs corresponding to the RABs in a cell.ENUDL,Max is the maximum ENU of a cell. It is set by the DlTotalEqUserNum parameter.DL,CCH is the reserved load on the downlink common channels. It is set by the DlCCHLoadRsrvCoeff parameter.DL,DCH_ENU is the ENU load of all DCH RABs in a cell. It is the ratio of the sum of ENUs for all DCH RABs to the maximum ENU in a cell (DlTotalEqUserNum).ThdHSDPAMaxGBP is the maximum guaranteed load threshold for HSDPA services when the RNC makes an admission decision on an R99 service. It is set by the HsdpaMaxGBPThd parameter.

WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission Downlink ENU Resource Admission DecisionsFor non-DC-HSDPA RABsIf the bearer type is the DCH RAB DL,ENU + DL,ENU THdOr DL,R99Prefer-ENU + DL,ENU DlCellTotalThdIf the bearer type is the HSDPA RAB DL,ENU + DL,ENU THdsuch as DlNonCtrlThdForAMR, DlNonCtrlThdForNonAMR, DlNonCtrlThdForOther or DlNonCtrlThdForHo


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

DL,ENU is the sum of the downlink total ENU load.DL,ENU is the ENU load increase caused by the new service.DL,R99Prefer-ENU is the sum of the total downlink load for preferential admission of R99 services.For DC-HSDPA RABsThe admission succeeds when the total ENU of the DC-HSDPA cell group divided by the maximum ENU of the DC-HSDPA cell group is lower than the sum of admission thresholds of the primary cell and that of the secondary cell.

WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission Page76Parameters of Power CAC (Cont.)UlTotalEqUserNum Parameter name: UL total equivalent user number Recommended value: 95DlTotalEqUserNum Parameter name: DL total equivalent user number Recommended value: 80Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

UlTotalEqUserNum ContentWhen the algorithm 2 is used, this parameter defines the total equivalent user numbers corresponding to the 100% uplink load. The parameter should be related to the admission threshold and actual condition of the network. Value range: 1~200 Physical value range:1~200; step: 1DlTotalEqUserNum Content: 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. Value range: 1~200 Physical value range:1~200; step: 1 Set these parameters through ADD UCELLCAC/ MOD UCELLCAC.Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage77Power-Based Admission Algorithm 3 for RAB Setup Algorithm 3 is similar to algorithm 1. The only difference is that the estimated load increase in algorithm 3 is always set to 0.Based on the current cell load, the RNC determines whether the cell load exceeds the threshold If the cell load exceeds the threshold, the RNC rejects the access request. If not, the RNC admits the service.Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersUplink Power-Based Admission Algorithm 4 for RAB SetupAlgorithm 4 makes admission decisions based on the total uplink load UL, Actual-Total as the following formula:UL, Actual-Total = UL, Actual + UL,CCHRNC makes the admission decision UL, Actual-Total + UL THdsuch as UlNonCtrlThdForAMR, UlNonCtrlThdForNonAMR, UlNonCtrlThdForOther, or UlNonCtrlThdForHo


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

UL, Actual is the actual uplink service load. UL,CCH is the reserved load on the uplink common channels. It is set by the UlCCHLoadFactor parameter.

WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission Uplink Power-Based Admission Algorithm 4 for RAB SetupIn DC-HSUPA cellsFor DC-HSUPA non-scheduling services, admission decisions based on the total uplink load are made only on the primary carrier. For DC-HSUPA scheduling service is admitted if admission decision based on the total uplink load is successful on the primary or secondary carrier.


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

For DC-HSUPA cells, the uplink load introduced by the DC-HSUPA UE is calculated and then apportioned on the primary and secondary carriers based on the UE rate ratio per carrier. The RNC decides whether to admit a DC-HSUPA UE based on the total uplink load and uplink load increment introduced by the DC-HSUPA UE on the primary carrier and secondary carriers. The admission decision method is the same with that of SC-HSUPA.

WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission Page80ContentsCAC (Call Admission Control)2.1 CAC Overview2.2 CAC Based on Code Resource 2.3 CAC Based on Power Resource 2.4 CAC Based on NodeB Credit Resource 2.5 CAC Based on Iub Resource 2.6 CAC Based on the Number of HSPA Users


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersPage81NodeB Credit The NodeB credit resource is a concept on the RNC side. It is referred to as the channel element (CE) on the NodeB side.

CEs are used to measure the channel demodulation capability of NodeBs. CEs are classified into uplink and downlink CEs.One uplink CE needs to be consumed by an uplink 12.2 kbit/s voice service (SF = 64) plus 3.4 kbit/s signaling traffic.One downlink CE needs to be consumed by a downlink 12.2 kbit/s voice service (SF = 128) plus 3.4 kbit/s signaling traffic.


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

If only 3.4 kbit/s signaling traffic is carried on a DCH or HSPA channel, one CE is still needed. CEs have been reserved for common and HSDPA-related channels. NodeB credit resource-based admission is implemented at NodeB level, local cell group (LCG) level (if any), and local cell (LC) level. Cells in an LCG share the CEs of the LCG in the uplink. The NodeB sends the RNC an audit response message, reporting the CE capability of the three levels. The NodeB considers physical and licensed CEs when reporting the CE capability to the RNC. The NodeB-level CEs are the licensed CEs supported by the NodeB.In the uplink, the number of LCG-level CEs are the smaller one between the number of LCG-level physical CEs and the number of NodeB-level licensed CEs. In the downlink, the number of LCG-level CEs are the sum of downlink CEs on all boards of the LCG. In the uplink, the LC-level CEs are the physical CEs of the uplink resource group to which the cell belongs. In the downlink, the LC-level CEs are the physical CEs of the baseband processing board to which the cell belongs.

Confidential Information of Huawei. No Spreading Without Permission WCDMA Admission Control Algorithm and ParametersNodeB Credit Resource-based Admission DecisionsRRC Connection Setup RequestsIf the RRCCeCodeCacChoice parameter is set to LOOSE_CACNodeB credit resource-based admission succeeds if the available credit resources of the local cell, local cell group (if any), and NodeB are sufficient for setting up an RRC connection.Page82Copyright 2012 Huawei Technologies Co., Ltd. All rights reserved. :32-35pt : R153 G0 B0 :FrutigerNext LT Medium : Arial

:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission NodeB Credit Resource-based Admission Decisions (Cont.)If the RRCCeCodeCacChoice parameter is set to STRICT_CAC, admission based on the cause carried in the RRC connection setup request:If the cause is "Emergency Call" or "Detach" admission succeeds if the available credit resources are sufficient.For any other causethe RNC must ensure that the available credit resources of the local cell, local cell group (if any), and NodeB exceed the reserved credit resources upon admitting an RRC connection setup request.


:30-32pt : R153 G0 B0:


:18-20pt(2-5):18pt ::

13

.

The reserved credit resources are calculated using SF which is specified by the parameter DlRRCCeCodeResvSf (for the downlink) or UlRRCCeResvSf (for the uplink).WCDMA Admission Control Algorithm and ParametersConfidential Information of Huawei. No Spreading Without Permission NodeB Credit Resource-based Admission Decisions (Cont.)Handover Service Requestsadmission succeeds if the available credit resources

OWO116080 WCDMA RAN14 Admission Control Algorithm and Parameters ISSUE1.00

Documents

Transcript of OWO116080 WCDMA RAN14 Admission Control Algorithm and Parameters ISSUE1.00