Differentiated HSPA Service(RAN13.0_03)
Transcript of Differentiated HSPA Service(RAN13.0_03)
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Differentiated HSPA ServiceRAN13.0
Feature Parameter Description
Issue 03
Date 2012-05-30
HUAWEI TECHNOLOGIES CO., LTD.
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Copyright © Huawei Technologies Co., Ltd. 2012. All rights reserved.
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The information in this document is subject to change without notice. Every effort has been made in the
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Huawei Technologies Co., Ltd.
Address: Huawei Industrial Base
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WCDMA RAN
Differentiated HSPA Service Contents
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i
Contents
1 Introduction ................................................................................................................................ 1-1 1.1 Scope ............................................................................................................................................ 1-1 1.2 Intended Audience......................................................................................................................... 1-1 1.3 Change History .............................................................................................................................. 1-1
2 Overview...................................................................................................................................... 2-1 3 Differentiated HSPA Service Based on Service Type ...................................................... 3-1 4 Differentiated HSPA Service Based on User Priority ...................................................... 4-1 5 Settings for HSPA QoS Parameters ..................................................................................... 5-1
5.1 Description .................................................................................................................................... 5-1 5.2 Settings for the GBR ..................................................................................................................... 5-2 5.3 Settings for the HBR ..................................................................................................................... 5-2 5.4 Settings for User Priority ............................................................................................................... 5-2 5.5 Settings for THP Class .................................................................................................................. 5-2 5.6 Settings for the SPI ....................................................................................................................... 5-3 5.7 Settings for the SPI Weight ........................................................................................................... 5-3
5.7.1 Description ............................................................................................................................ 5-3 5.7.2 Mapping of E-DCH/HS-DSCH Category and MBR to Rate Range ...................................... 5-4 5.7.3 Mapping of the SPI and Rate Range to SPI Weight ............................................................ 5-4
6 Related Features ....................................................................................................................... 6-1 6.1 WRFD-020806 Differentiated Service Based on SPI Weight ....................................................... 6-1
7 Impact on the Network............................................................................................................. 7-1 7.1 WRFD-020806 Differentiated Service Based on SPI Weight ....................................................... 7-1
8 Engineering Guidelines........................................................................................................... 8-1 8.1 When to Use Differentiated Service Based on SPI Weight ........................................................... 8-1 8.2 Information to Be Collected ........................................................................................................... 8-1 8.3 Recommended Settings for Key Parameters ................................................................................ 8-1 8.4 Feature Deployment ...................................................................................................................... 8-4 8.5 Performance Optimization ............................................................................................................. 8-5
9 Parameters.................................................................................................................................. 9-1 10 Counters.................................................................................................................................. 10-1 11 Glossary .................................................................................................................................. 11-1 12 Reference Documents ......................................................................................................... 12-1
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WCDMA RAN
Differentiated HSPA Service 1 Introduction
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1-1
1 Introduction
1.1 Scope
This document describes the feature Differentiated HSPA Service. Differentiated HSPA service isclassified into differentiated HSPA service based on service type and differentiated HSPA service basedon user priority.
1.2 Intended Audience
This document is intended for:
Personnel who are familiar with WCDMA basics
Personnel who need to understand Differentiated HSPA Service
Personnel who work with Huawei products
1.3 Change HistoryThis section provides information on changes in different document versions.
There are two types of changes, which are defined as follows:
Feature change: refers to a change in the feature Differentiated HSPA Service.
Editorial change: refers to a change in wording or the addition of the information that was notdescribed in the earlier version.
Document Issues
The document issues are as follows:
03 (2012-05-30)
02 (2011-06-30)
01 (2011-04-30)
Draft B (2011-03-30)
Draft A (2010-12-30)
03 (2012-05-30)
This is the document for the third commercial release of RAN13.0.
Compared with issue 02 (2011-06-30) of RAN13.0, this issue has the following changes.
Change Type Change Description Parameter Change
Feature change None. None.
Editorial change The following chapters are added:
6 Related Features
7 Impact on the Network
None.
The engineering guideline is optimized. For details, see8 "Engineering Guidelines."
None.
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Differentiated HSPA Service 1 Introduction
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1-2
02 (2011-06-30)
This is the document for the second commercial release of RAN13.0.
Compared with issue 01 (2011-04-30) of RAN13.0, this issue add the engineering guidelines about
Differentiated Service Based on SPI Weight.
01 (2011-04-30)
This is the document for the first commercial release of RAN13.0.
Compared with issue Draft B (2011-03-30) of RAN13.0, this issue has no change.
Draft B (2011-03-30)
This is the draft of the document for RAN13.0.
Compared with Draft A (2010-12-30) of RAN13.0, this issue optimizes the description.
Draft A (2010-12-30)This is the draft of the document for RAN13.0.
Compared with issue 01 (2010-12-20) of RAN12.0, this issue incorporates the following change:
SPI weight can be configured based on the SPI and rate range instead of based on SPI.
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Differentiated HSPA Service 2 Overview
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2 Overview
As HSPA technology develops, HSPA channels have become the main radio bearers for UMTS services.
This feature is applicable only to HSPA channels. It provides differentiated service for users based onservice type and user priority.
Uu interface resources, channel element (CE) resources, and Iub interface resources are allocated toHSPA users according to resource scheduling algorithms. If these resources are not sufficient to providethe maximum bit rate (MBR) for all online HSPA users, the RAN will allocate these resources to usersbased on service type and user priority. High service quality is preferentially guaranteed for high-priorityservices and users. Higher-priority services such as speech services enjoy better service thanlower-priority services such as Best Effort (BE) services. Higher-priority users such as Gold users enjoybetter service than lower-priority users such as Copper users.
Differentiated HSPA service needs to be supported by CN, RAN and UE, as described in Table 2-1.
Table 2-1 Dependencies on NEs
NetworkElement
Description
CN The CN sends QoS parameters to the RNC.
RNC The RNC supports QoS mapping. Based on QoS mapping, the RNC converts the receivedQoS parameters into those that can be used within the RAN.
NodeB During Uu interface scheduling and Iub interface flow control, the NodeB allocates resourcesto services and users based on the QoS parameters received from the RNC. The NodeBprovides:
Differentiated service based on service type: The NodeB preferentially provides service for
higher-priority services. Differentiated service based on user priority: The NodeB preferentially provides service for
higher-priority users.
UE UEs report their E-DCH and HS-DSCH categories to the RNC for calculating the SchedulingPriority Index (SPI) weight.
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Differentiated HSPA Service
3 Differentiated HSPA Service Based on Service
Type
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3 Differentiated HSPA Service Based on Service Type
PS services are generally carried on HSPA channels. According to 3GPP Release 8, CS AMR servicescan also be carried on HSPA channels.
Services carried on HSPA channels are classified into delay-sensitive services and throughput-sensitiveservices. Table 3-1 lists typical service types.
Table 3-1 Service types
Service Type Service QoS Requirement
Delay-sensitive services Signaling
VoIP
CS AMR
Low traffic volume
Short delay
Throughput-sensitive services Streaming
Interactive Background
IMS signaling
High traffic volume
High throughput
Different QoS strategies are provided for different types of services:
For delay-sensitive services, the Uu scheduling function limits the packet transmission delay to anacceptable range. For throughput-sensitive services, this function strives to provide rates not lower than the Guaranteed Bit Rate (GBR). QoS requirements of delay-sensitive services are preferentiallymet during scheduling because users are more sensitive to these services.
For delay-sensitive services, the NodeB does not perform flow control on the Iub interface. Therefore,these services are always allocated sufficient bandwidth. For throughput-sensitive services, flowcontrol must be performed. If congestion occurs on the Iub interface, bandwidth for these services isdecreased.
3GPP TS 23.107 defines only four service types, which cannot fully reflect the QoS requirements of services on a live network. For example, a Web page may contain video streams in addition to text andimages; email, video website browsing, and Bit Torrent (BT) downloads are all mapped to thebackground service. Services on a live network are complex and have different QoS requirements. TheRNC identifies and classifies complex service types and provides appropriate QoS to improve user experience.
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Differentiated HSPA Service
4 Differentiated HSPA Service Based on User
Priority
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4 Differentiated HSPA Service Based on User Priority
Differentiated HSPA service based on user priority is mainly applicable to BE (throughput-sensitive)services: interactive and background services. There are three user priorities: Gold, Silver, and Copper.
This function enables telecom operators to set different GBRs, Happy Bit Rates (HBRs), and SPIweights for different user priorities. Based on these parameter settings, the NodeB providesdifferentiated service for different user priorities during Uu interface scheduling and Iub interface flowcontrol.
In case of resource insufficiency, higher-priority users are provided with better service quality.
Differentiated HSPA service based on user priority is implemented in the following ways:
Based on user priorities, GBRs are configured for BE services by the RNC, not the CN. HSPAscheduling strives to guarantee GBRs for BE services, so that users with different priorities obtaindifferent GBRs.
HBR is the expected throughput of users. When the data rate of a user reaches its HBR, the
scheduling function reduces the scheduling priority of this user. The RNC configures different HBRs for users of different priorities.
SPI weight is the weight of the SPI configured based on user priority and service type. It ranges from1% to 100%. When radio resources are insufficient, HSPA scheduling and flow control enableresources to be allocated among users based on SPI weight. If Gold, Silver, and Copper users are inthe same radio environment, the ratio of their throughput approximately equals the ratio of their SPIweight. Operators can set different SPI weight for users with different priorities.
Differentiated Service Based on SPI Weight (WRFD-020806 Differentiated Service Based on SPI Weight)is implemented as follows:
Generally, Iub flow control and Uu scheduling enable the NodeB to allocate bandwidth to users based ontheir SPI weight. If allocating bandwidth based on SPI weight does not meet GBR requirements of all BE
services, the RAN preferentially allocates bandwidth to the BE services to ensure all their GBRsregardless of their SPI weight. Then, the RAN allocates the remaining bandwidth based on SPI weight.
In this way, users of higher SPI weight enjoy better service. In addition, resource allocation differentiationamong users is quantified by the ratio of SPI weight among users.
The following is an example of differentiated service based on SPI weight:
The ratio of SPI weight between Gold, Silver, and Copper users is 9:3:1.
A cell has a total bandwidth of 3 Mbit/s.
There are altogether ten online users in the cell. Resources in the cell are not sufficient to meet thedata transmission requirements of all ten users.
The GBRs of Gold, Silver, and Copper users are all 64 kbit/s.
The following table lists how resources are allocated:
User Priority Gold Silver Copper
Number of Online Users 1 3 6
Mean User Throughput 1.1 Mbit/s 380 kbit/s 120 kbit/s
Differentiated Service Based on SPI Weight supports differentiated billing policies. For example,higher-charge-rate users are provided with better service. It also provides users with differentiated
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Differentiated HSPA Service
4 Differentiated HSPA Service Based on User
Priority
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service quality based on service types. For example, low-charge-rate BE service users are provided withlow service-quality if network resources are insufficient.
For SPI weight settings, see the next chapter.
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Differentiated HSPA Service 5 Settings for HSPA QoS Parameters
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5 Settings for HSPA QoS Parameters
5.1 Description
The CN sends QoS parameters to the RAN over the Iu interface through an RAB ASSIGNMENTREQUEST message. Based on QoS mapping, the RAN converts the received QoS parameters intothose that can be used within the RAN. Then, the RAN implements differentiated HSPA service based onthe QoS parameters. Figure 5-1 shows the HSPA QoS mapping. Operators may configure the QoSmapping by setting QoS parameters on the RNC.
Figure 5-1 QoS mapping
QoS mapping can be configured for individual operators:
If parameters for operator-oriented differentiated service are not configured, or the corresponding MMLcommands are unavailable, the settings of the RNC-oriented differentiated service parametersautomatically take effect.
When neither RAN sharing nor multi-operator core network (MOCN) is enabled, parameters for operator-oriented differentiated service do not need to be set.
When only RAN sharing is enabled, parameters for operator-oriented differentiated service can be set.
When only MOCN is enabled, parameters for operator-oriented differentiated service should not be set.However, if operators use different CN strategies, for example, different settings of allocation retentionpriority (ARP) or traffic handling priority (THP), these parameters should be set to guarantee servicefairness among operators.
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Differentiated HSPA Service 5 Settings for HSPA QoS Parameters
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5.2 Settings for the GBR
The CN does not set GBRs for interactive and background services. To guarantee basic rates for thesetwo types of services, the RNC allows GBRs to be configured for them. GBRs vary according to user priority and link direction (uplink or downlink).
Table 5-1 Example of GBR mapping based on user priority
Direction Gold Silver Copper
Downlink 256 kbit/s 128 kbit/s 64 kbit/s
Uplink 256 kbit/s 128 kbit/s 64 kbit/s
Note: GBRs are configured based on user priority, traffic class (TC), traffic handling priority (THP), andR99/HSPA bearers. The example only shows configuration of GBRs based on user priority.
The mapping of TrafficClass , THPClass , BearType and UserPriority to GBR is set by running the SETUUSERGBR command on the RNC. The operator-oriented mapping is set by running the ADDUOPERUSERGBR or MOD UOPERUSERGBR command.
5.3 Settings for the HBR
The HBR is determined by the HappyBR parameter. The RNC delivers HappyBR to the NodeB on theIub interface.
When NodeB resources are limited, a user's HS-DSCH scheduling priority is reduced if the user'sHS-DSCH rate exceeds HappyBR . Moderately reducing the user's scheduling priority in this caseleaves more scheduling chances for users with throughput below their HBRs. As a result, the total
satisfaction level is increased. If this parameter is set to zero, it indicates that the NodeB does notdynamically adjust the HS-DSCH scheduling priority based on the HBR.
The mapping of TrafficClass , THPClass , and UserPriority to HappyBR is set by running the SETUUSERHAPPYBR command on the RNC. The operator-oriented mapping is set by running the ADDUOPERUSERHAPPYBR command.
5.4 Settings for User Priority
The user priority is determined by ARP. The mapping of ARP to the user priority is set by running theSET UUSERPRIORITY command. The operator-oriented mapping is set by running the ADDUOPERUSERPRIORITY or MOD UOPERUSERPRIORITY command.
Table 5-2 Default mapping of ARP to UserPriority
ARP 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
UserPriority Error Gold Silver Copper
5.5 Settings for THP Class
The THP class is determined by THP. The mapping of THP to the THP class is set by running the SETUTHPCLASS command. The operator-oriented mapping is set by running the ADD UOPERTHPCLASS or MOD UOPERTHPCLASS command.
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Differentiated HSPA Service 5 Settings for HSPA QoS Parameters
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Table 5-3 Default mapping of THP to THPClass
THP 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
THPClass High Medium Low
5.6 Settings for the SPI
The mapping of TC, user priority, and THP class to the SPI is set on the RNC.
The SET USCHEDULEPRIOMAP command is used to set the mapping of TrafficClass , UserPriority , and THPClass to SPI .
The ADD UOPERSCHEDULEPRIOMAP command is used to set the operator-oriented mapping.
Table 5-4 Default mapping of TrafficClass, UserPriority, and THPClass to SPITrafficClass UserPriority THPClass SPI
Interactive Gold High 10
Gold Medium 9
Gold Low 8
Silver High 7
Silver Medium 6
Silver Low 5
Copper High 4
Copper Medium 3
Copper Low 2
Background Gold None 8
Silver None 5
Copper None 2
5.7 Settings for the SPI Weight
5.7.1 Description
The RNC determines SPI weight as follows:
Step 1 The RNC determines the rate range based on the UE’s E-DCH/HS-DSCH category and MBR.The rate range varies according to link direction.
Step 2 The RNC determines SPI weight based on the SPI and rate range.
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Differentiated HSPA Service 5 Settings for HSPA QoS Parameters
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5.7.2 Mapping of E-DCH/HS-DSCH Category and MBR to Rate Range
The RNC determines the uplink (UL) and downlink (DL) rates based on the values of theUlCapacitySelect and DlCapacitySelect parameters, E-DCH/HS-DSCH category, and MBR.
In the DL− If DlCapacitySelect is set to MBR, the DL rate equals the MBR;
− If DlCapacitySelect is set to Min, the DL rate equals Min (RateCate, MBR);
− If DlCapacitySelect is set to Max, the DL rate equals Max (RateCate, MBR);
− If DlCapacitySelect is set to Category, the DL rate equals RateCate.
In the UL
− If UlCapacitySelect is set to MBR, the UL rate equals MBR;
− If UlCapacitySelect is set to Min, the UL rate equals Min (RateCate, MBR);
− If UlCapacitySelect is set to Max, the UL rate equals Max (RateCate, MBR);
−
If UlCapacitySelect is set to Category, the UL rate equals RateCate. RateCate is the peak rate supported by the HS-DSCH/E-DCH category.
Then the RNC determines the rate range based on the UL and DL rates. A rate range is the range that aDL or UL rate falls into. For example, if DlRateThreshold1 < DL Rate < DlRateThreshold2 , (DlRateThreshold1 -DlRateThreshold2 ) is the DL rate range.
There are 10 rate ranges altogether, denoted by {<T1, T1-T2, T2-T3, ... T8-T9, >T9}. T1 to T9 areconfigured by setting the following parameters in the SET UCAPARATERANGE command.
Table 5-5 Rate range parameters
DL Parameter Default Value UL Parameter Default Value
DlRateThreshold1 128 kbit/s UlRateThreshold1 128 kbit/s
DlRateThreshold2 384 kbit/s UlRateThreshold2 384 kbit/s
DlRateThreshold3 512 kbit/s UlRateThreshold3 512 kbit/s
DlRateThreshold4 1,000 kbit/s UlRateThreshold4 768 kbit/s
DlRateThreshold5 2,000 kbit/s UlRateThreshold5 1,000 kbit/s
DlRateThreshold6 4,000 kbit/s UlRateThreshold6 1,500 kbit/s
DlRateThreshold7 8,000 kbit/s UlRateThreshold7 2,500 kbit/s
DlRateThreshold8 16,000 kbit/s UlRateThreshold8 5,500 kbit/sDlRateThreshold9 32,000 kbit/s UlRateThreshold9 7,500 kbit/s
Operator-oriented mapping to the rate range is set by running the ADD UOPERCAPARATERANGE command.
5.7.3 Mapping of the SPI and Rate Range to SPI Weight
The RNC determines SPI weight based on the following table:
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Differentiated HSPA Service 5 Settings for HSPA QoS Parameters
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Figure 5-2 Mapping of SPI and rate range to SPI weight
The mapping of the SPI and rate range to SPI weight is set by running the SET USPIWEIGHT command.The operator-oriented mapping is set by running the ADD UOPERSPIWEIGHT command.
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Differentiated HSPA Service 6 Related Features
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6 Related Features
6.1 WRFD-020806 Differentiated Service Based on SPI Weight
Required Features
WRFD-01061103 Scheduling based on EPF and GBR must be configured before WRFD-020806Differentiated Service Based on SPI Weight can be applied in the downlink over the Uu interface.
WRFD-01061402 Enhanced Fast UL Scheduling or WRFD-010638 Dynamic CE ResourceManagement must be configured before WRFD-020806 Differentiated Service Based on SPI Weightcan be applied in the uplink over the Uu interface. When WRFD-020806 Differentiated Service Basedon SPI Weight is used with WRFD-01061402 Enhanced Fast UL Scheduling, only uplink Uu interfaceresources can be differentially scheduled. However, when WRFD-020806 Differentiated ServiceBased on SPI Weight is used with WRFD-010638 Dynamic CE Resource Management, both uplinkUu interface resources and CE resources can be differentially scheduled.
WRFD-010610 HSDPA Introduction Package and WRFD-050405 Overbooking on ATM Transmission,
or WRFD-010610 HSDPA Introduction Package and WRFD-050408 Overbooking on IP Transmissionmust be configured before WRFD-020806 Differentiated Service Based on SPI Weight can be appliedin the downlink over the Iub interface.
WRFD-010637 HSUPA Iub Flow Control in Case of Iub Congestion must be configured beforeWRFD-020806 Differentiated Service Based on SPI Weight can be applied in the uplink over the Iubinterface.
Mutually Exclusive Features
N/A
Affected Features
N/A
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Differentiated HSPA Service 7 Impact on the Network
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7 Impact on the Network
7.1 WRFD-020806 Differentiated Service Based on SPI Weight
Impact on System Capacity
WRFD-020806 Differentiated Service Based on SPI Weight impacts the downlink system capacity in thefollowing ways:
Differentiated service is based on an SPI weight during HSDPA scheduling over the Uu interface andflow control over the Iub interface. UEs with a larger SPI weight are allowed to use more Uu interfacepower resources, code resources, and Iub bandwidth resources, and therefore achieve a higher downlink throughput. When there is a large amount of data to transmit, the downlink throughput ratio of the UEs with the same conditions, such as the same GBR configuration and location, is approximatelyequal to their SPI weight ratio.
Increasing the SPI weight for UEs in weak coverage areas increases scheduling chances for the UEs,
reduces cell resource usage efficiency, and reduces cell throughput. Increasing the SPI weight for UEsin strong coverage areas increases scheduling chances for the UEs, increases cell resource usageefficiency, and increases cell throughput.
WRFD-020806 Differentiated Service Based on SPI Weight impacts the uplink system capacity in thefollowing ways:
Differentiated service is based on an SPI weight during HSUPA scheduling over the Uu interface, flowcontrol over the Iub interface, and CE scheduling (if Dynamic CE Resource Management is enabled).UEs with a larger SPI weight are allowed to use more Uu interface resources, Iub bandwidth resources,and CE resources, and therefore achieve a higher uplink throughput. When there is a large amount of data to transmit and the rate is not limited by the transmit power, UE capabilities, and QoS-relatedconfigurations (such as the GBR and MBR), the uplink throughput ratio of the UEs is approximately
equal to their SPI weight ratio. In scenarios with the same number of UEs and the same configurations, the uplink system throughput
when the UEs are assigned different SPI weight values is larger than when they are assigned thesame SPI weight.
Impact on Network Performance
No impact.
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Differentiated HSPA Service 8 Engineering Guidelines
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8 Engineering Guidelines
8.1 When to Use Differentiated Service Based on SPI Weight
Use this feature when the operator expects to achieve the following:
Reduce the cost per bit by limiting the resources available to heavy-traffic service users.
At the initial phase of HSPA network deployment, operators may charge a monthly flat fee to attractHSPA users. Some of these users perform heavy-traffic downloading, which occupies a large amountof Uu or Iub interface resources. At the same time, the network load increases. Therefore, the cost per bit increases. Deploying Differentiated Service Based on SPI Weight enables operators to limit thedata rate for heavy-traffic service users, reducing the cost per bit. Before deploying this feature,operators must collect statistics, such as each user's total monthly traffic. Then, the operators candeploy this feature to reduce resources available to users whose total monthly traffic exceeds thespecified value. These users will be assigned lower priorities.
Increase revenue by implementing differentiated charging policies.
Operators implement differentiated charging policies, such as postpaid and prepaid services, toincrease revenue. Postpaid service users have higher priorities than prepaid service users. User priorities must be configured on the CN based on the charging policy. The RAN needs to adopt adifferentiated policy for allocating resources to users with different priorities. With this feature, postpaidservice users are allocated more bandwidth when resources are limited.
When this feature is activated, the downlink scheduling algorithm allocates resources based on the SPIweight, reducing the weight of channel conditions in the calculation of the scheduling priority. When mosthigh-priority UEs have poor channel conditions, the cell throughput decreases. In contrast, when mosthigh-priority UEs have good channel conditions, the cell throughput increases. When Iub resources, CEresources, and uplink Uu interface resources are limited, the cell throughput does not decrease.
8.2 Information to Be Collected Charging policy and user priorities configured on the CN
When user priorities are configured on the CN based on the charging policy, this feature providesbetter user experience for higher-priority users. This helps operators to increase revenue.
Cell load
When cell load is heavy, some resources, such as Uu interface resources, CE resources, andtransmission resources, may be insufficient. This feature reduces the cost per bit by limiting theresources available to heavy-traffic service users.
8.3 Recommended Settings for Key Parameters This section describes the key parameters and recommended settings for deploying DifferentiatedService Based on SPI Weight.
User Priority
The user priority is determined by ARP. The mapping of ARP to the user priority is set by running theSET UUSERPRIORITY command. There are three user priorities: gold, silver, and copper.
THP Class
The THP class is determined by THP. The mapping of THP to the THP class is set by running the SETUTHPCLASS command. There are three THP classes: high, medium, and low.
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MBR
The MBR of a UE in the RAN is determined by factors such as the MBR allocated by the CN, Uuinterface capability of the UE, and Uu interface bearer type.
If resources are sufficient on the RAN side, UEs experiencing heavy traffic can reach their MBRs. Toprovide differentiated rates for gold, silver, and copper users, operators need to configure MBRs indescending order for these types of users. If differentiated rates are not required, operators canconfigure the same MBR for all of the users.
If resources are insufficient on the RAN side, UEs may fail to reach their MBRs. The opportunities for UEs to obtain resources are closely related to their SPI weight. Operators can configure different SPIweights for gold, silver, and copper users to provide differentiated resource allocation.
Operators can configure MBRs for gold, silver, and copper users on the HLR based on their own policieswithout being limited by any rules on the RAN side. For example, gold users can be configured with anMBR greater than or equal to the MBR of silver users. The RAN side does not forcibly require that theMBR of gold users be greater than the MBR of silver users.
The following table lists example MBRs allocated by the CN.
Service Type HLR
Subscriber Class MBR
Postpaid service High-end subscriber 7.2 Mbit/s
Prepaid service plan A (monthlysubscription for 12.99 USD)
Common subscriber 7.2 Mbit/s
Prepaid service plan B (monthlysubscription for 12.99 USD)
Common subscriber 3.6 Mbit/s
Prepaid service plan C (monthlysubscription for 8.99 USD)
Low-end subscriber 2.0 Mbit/s
GBR
Differentiated guaranteed bit rates (GBRs) for gold, silver, and copper users are configurable on theRAN side by running the SET UUSERGBR command. GBRs are mainly configured for BE services.
When configuring GBRs, consider the following:
The GBR should be smaller than the planned full-coverage rate.
GBRs of UEs processing HSPA services should be greater than or equal to those of R99 UEsprocessing PS BE services. This ensures that the user experience for a service carried on an HSPAchannel is better than that for a service carried on an R99 channel.
To ensure throughput for specific UEs, operators can configure high GBRs for the UEs based onnetwork plan requirements on the CN and RAN sides.
Do not set GBRs to a large value unless necessary.
The following table lists example GBR configurations.
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Service Type HLR CN RAN
Subscriber Class MBR ARP THP SPI GBR
Postpaid service High-end
subscriber
7.2 Mbit/s 1 1 10 64 kbit/s
Prepaid service plan A(monthly subscription for 12.99 USD)
Commonsubscriber
7.2 Mbit/s 2 1 9 64 kbit/s
Prepaid service plan B(monthly subscription for 12.99 USD)
Commonsubscriber
3.6 Mbit/s 2 2 8 64 kbit/s
Prepaid service plan C(monthly subscription for 8.99 USD)
Low-endsubscriber
2 Mbit/s 3 1 7 64 kbit/s
Note that the GBR of an HSDPA UE can only be ensured in certain situations. For example, if an HSDPAUE is at the edge of cell coverage and channel quality is poor, a large amount of cell resources arerequired to ensure the downlink GBR of the UE. This reduces the total cell capacity, which is unfair toother UEs using services in the same cell.
To prevent this problem, operators need to configure the maximum percentage of power resourcesavailable for different downlink GBRs by running the SET RSCLMTPARA command on the NodeB side.If the Uu interface is congested, the GBR of a UE cannot be ensured if the percentage of power requiredto ensure the GBR in the maximum transmit power of the cell exceeds the maximum percentage of available power resources. The following table lists the default mapping between a GBR and the
maximum percentage of available power resources in the maximum transmit power of the cell.
GBR Maximum Percentage of Available Power Resources
8 kbit/s 10%
16 kbit/s 10%
32 kbit/s 15%
64 kbit/s 15%
128 kbit/s 20%
256 kbit/s 25%
384 kbit/s 30%
512 kbit/s 40%
640 kbit/s 45%
768 kbit/s 50%
896 kbit/s 55%
1024 kbit/s 60%
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GBR Maximum Percentage of Available Power Resources
1536 kbit/s 65%
1800 kbit/s 70%
Assuming that the GBR of a UE is 384 kbit/s, the maximum percentage of available power resources is30%. If the planned full-coverage rate for the cell is 384 kbit/s and Uu interface resources are insufficient,UEs at the cell edge can only obtain a rate lower than 384 kbit/s.
Uplink GBRs have a similar limitation on available power resources, but the uplink maximum percentageof available power resources is not configurable.
SPI
Operators can specify the SPI for resource allocation to different traffic classes. The SPI is determinedby the THP class (configured for interactive services), traffic class, and user priority. The mapping of thetraffic class, user priority, and THP class to the SPI is set by running the SET USCHEDULEPRIOMAP command. Signaling radio bearer (SRB) at the RRC layer, IP multimedia subsystem (IMS) signaling, and real-timeservices (conversational and streaming services) have an SPI in the range of 12-15. They are allhigh-priority services. For signaling and conversational services, the SPI does not vary with the user priority. BE services (background and interactive services) need to be configured with an SPI in therange of 2-11. The SPI varies according to the settings for the user priority and THP class. This variationdifferentiates BE services.
SPI Weight
Operators can specify the SPI weight to enable UEs of a class to obtain a certain percentage of resources. The SPI weight is given as a percentage and is configurable in the SET USPIWEIGHT command.
From RAN13.0 releases, the SPI weight can be configured based on the UE category and MBR, as wellas the user priority and traffic class. This configuration helps ensure that a UE with a high MBR(specified during the service subscription) or with a high capability class obtains high-priority services.
If Differentiated Service Based on SPI Weight and the Service Awareness feature are enabled, ensurethe following so that Differentiated Service Based on SPI Weight can produce the desired effect:
Maximum SPI weight x Service priority adjusting coefficient ≤ 100%
Minimum SPI weight x Service priority adjusting coefficient ≥ 1%
The service priority adjusting coefficient is specified by SERVICEPRIADJCOEF .
8.4 Feature Deployment For details on how to activate, verify, and deactivate this feature, see Configuring Differentiated ServiceBased on SPI Weight in the Feature Activation Guide.
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8.5 Performance Optimization
Monitoring
Monitor the effect of this feature by comparing values of the following cell counters measured before andafter the Differentiated Service Based on SPI Weight feature is activated:
Table 8-1 Counters related to HSDPA services
Counter Name Description
VS.HSDPA.MeanGoldenBeChThroughput.TotalBytes
Number of Total Bytes Sent in Downlink of HSDPA MAC-d Flowof BE Service for Golden Subscriber for Cell
VS.HSDPA.MeanSilverBeChThroughput.TotalBytes
Number of Total Bytes Sent in Downlink of HSDPA MAC-d Flowof BE Service for Silver Subscriber for Cell
VS.HSDPA.MeanCopperBeChThro
ughput.TotalBytes
Number of Total Bytes Sent in Downlink of HSDPA MAC-d Flow
of BE Service for Copper Subscriber for CellVS.HSDPA.MeanGoldenBeChThroughput
Mean Downlink Throughput of HSDPA MAC-d Flow of BEService for Golden Subscriber for Cell
VS.HSDPA.MeanSilverBeChThroughput
Mean Downlink Throughput of HSDPA MAC-d Flow of BEService for Silver Subscriber for Cell
VS.HSDPA.MeanCopperBeChThroughput
Mean Downlink Throughput of HSDPA MAC-d Flow of BEService for Copper Subscriber for Cell
Auxiliary counter: VS.HSDPA.UE.Mean.Cell (Average Number of HSDPA UEs for Cell)
Table 8-2 Counters related to HSUPA services
Counter Name Description
VS.HSUPA.GoldenBeMeanChThroughput.TotalBytes
Number of Total Bytes Received in Uplink of HSUPA MAC-dFlow of BE Service for Golden Subscriber for Cell
VS.HSUPA.SilverBeMeanChThroughput.TotalBytes
Number of Total Bytes Received in Uplink of HSUPA MAC-dFlow of BE Service for Silver Subscriber for Cell
VS.HSUPA.CopperBeMeanChThroughput.TotalBytes
Number of Total Bytes Received in Uplink of HSUPA MAC-dFlow of BE Service for Copper Subscriber for Cell
VS.HSUPA.GoldenBeMeanChThroughput
Mean Uplink Throughput of HSUPA MAC-d Flow of BE Servicefor Golden Subscriber for Cell
VS.HSUPA.SilverBeMeanChThroughput
Mean Uplink Throughput of HSUPA MAC-d Flow of BE Servicefor Silver Subscriber for Cell
VS.HSUPA.CopperBeMeanChThroughput
Mean Uplink Throughput of HSUPA MAC-d Flow of BE Servicefor Copper Subscriber for Cell
Auxiliary counter: VS.HSUPA.UE.Mean.Cell (Average Number of HSUPA UEs for Cell)
To monitor this feature, collect statistics on the average throughput of gold, silver, and copper users.Ensure that the statistics are measured hourly during peak and off-peak hours. Ensure that the users are
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in the same cell supporting HSPA services. Compare the statistics measured before and after activatingthe feature.
The expected result is as follows after Differentiated Service Based on SPI Weight is activated:
During peak hours, the throughput of gold users increases but that of lower-priority users decreases. During off-peak hours, lower-priority users obtain more bandwidth than they would during peak hours
because there are a smaller number of UEs and more resources.
The total uplink and downlink throughput in the cell does not decrease.
The throughput ratio between gold, silver, and copper users may not perfectly match their SPI weight ratio because of differences in user behavior, user distribution, data volume, and channel quality.
Parameter Optimization
If long-term observation shows that the throughput of gold, silver, and copper users does not change asexpected after this feature is activated, adjust the mapping of SPI to SPI weight to change the rates
allocated to the three types of users.
To increase the throughput for a certain type of user during peak hours, increase the SPI weight mappedto the SPI of the user type. Similarly, to reduce the throughput for a certain type of user during peakhours, reduce the SPI weight mapped to the SPI. For example, assume that the ratio of the SPI weightbetween gold, silver, and copper users is 9:3:1. When there is a large amount of data to transmit andradio resources are insufficient, gold, silver, and copper users in the same radio environment have their throughput in descending order. The ratio of their throughput is approximately equal to the ratio of their SPI weight. If you want to increase the throughput of silver users, you could change the ratio to 9:5:1.
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Differentiated HSPA Service 9 Parameters
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9-1
9 Parameters
Table 9-1 Parameter description
Parameter ID NE MML Command Feature ID Feature Name Description
BearType BSC6900
SETUUSERGBR(Mandatory)
WRFD-050424 Traffic PriorityMapping ontoTransmissionResources
Meaning:Bearer typeof the service. R99indicates that theservice is carried ona non-HSPA channel.HSPA indicates thatthe service is carriedon an HSPA channel.
GUI ValueRange:R99, HSPA
Actual ValueRange:R99, HSPA
Unit:None
Default Value:None
DlCapacitySelect
BSC6900
SETUCAPARATERANGE(Optional)
WRFD-020806 DifferentiatedService Based onSPI Weight
Meaning:Method of determining anHSDPA service ratewhen thedifferentiated HSPA
service based on SPIweight function isenabled. Value MBRindicates that theHSDPA service rateis the downlink MBRassigned by the CN.Value Categoryindicates that thepeak ratecorresponding to theUE HSDPA category
is used. Value Minindicates that thesmaller one betweenMBR and the peakrate corresponding tothe UE HSDPAcategory is used.Value Max indicatesthat the greater onebetween MBR andthe peak ratecorresponding to theUE HSDPA category
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Parameter ID NE MML Command Feature ID Feature Name Description
is used.
GUI Value
Range:MBR~0Category~1
Min~2
Max
Actual ValueRange:MBR,Category, Min, Max
Unit:None
Default Value:Min
DlRateThreshold1
BSC6900
SETUCAPARATERANGE(Optional)
WRFD-020806 DifferentiatedService Based onSPI Weight
Meaning:Downlinkrate threshold 1. Thisparameter is used todetermine the valuerange of an HSDPAservice rate when thedifferentiated HSPAservice based on SPIweight function isenabled. The SPIweight is determinedaccording to thevalue range.
GUI ValueRange:0~256000
Actual ValueRange:0~256000
Unit:kbit/s
Default Value:128
DlRateThreshold2
BSC6900
SETUCAPARATERANGE(Optional)
WRFD-020806 DifferentiatedService Based onSPI Weight
Meaning:Downlinkrate threshold 2. Thisparameter is used todetermine the valuerange of an HSDPAservice rate when thedifferentiated HSPAservice based on SPIweight function isenabled. The SPIweight is determinedaccording to the
value range.
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Parameter ID NE MML Command Feature ID Feature Name Description
GUI ValueRange:0~256000
Actual ValueRange:0~256000
Unit:kbit/s
Default Value:384
HappyBR BSC6900
SETUUSERHAPPYBR(Optional)
WRFD-01061010 HSDPA FlowControl
Meaning:Defines thehappy bit rate of thebest effort (BE)service with differentuser priorities(user priorities can be set
by parameter UserPriority). ThisHappy bit rate is sentto NodeB by RNCthrough the Iubinterface. When theNodeB resource islimited and theHS-DSCH bit rate of the user exceeds theHappy bit rate, theHS-DSCH
scheduling prioritywill be decreased.When this parameter is set to zero, itindicates that NodeBwill not adjust theHS-DSCHscheduling priority.If the value of theparameter HappyBRin command ADDUOPERUSERHAPPYBR is larger than5000, it will be set tothe minimum of theHappyBR value inSETUUSERHAPPYBRand 5000.
GUI ValueRange:0~27900
Actual ValueRange:0~27900
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Parameter ID NE MML Command Feature ID Feature Name Description
Unit:kbit/s
Default Value:0
ServicePriAdjCoef
BSC6900
SETUDPUCFGDATA(Optional)
None None Meaning:Specifiesthe coefficient for adjusting servicepriority weight in thematchingrecord.(Adjusted SPIWeight = min (InitialSPI weight *ServicePriAdjCoef *10%, 100),Initial SPIweight is set by the
"SpiWeight"parameter on RNC.).
Note: Parameter "ServicePriAdjCoef"will be replaced with"ServPriAdjCoefHigh","ServPriAdjCoefMiddle", and"ServPriAdjCoefLow"in current and later versions.
GUI ValueRange:1~100
Actual ValueRange:10%~1000%
Unit:0.1
Default Value:10
SPI BSC6900
SETUSCHEDULEPRIOM
AP(Mandatory)
WRFD-020806 DifferentiatedService Based on
SPI Weight
Meaning:Schedulingpriority of interactive
and backgroundservices. Value 11indicates the highestpriority, while value 2indicates the lowestpriority. Values 0, 1,12, 13, 14, and 15are reserved for theother services.
GUI ValueRange:2~11
Actual Value
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Parameter ID NE MML Command Feature ID Feature Name Description
Range:2~11
Unit:None
Default Value:None
THPClass BSC6900
SETUSCHEDULEPRIOM AP(Mandatory)
WRFD-050424
WRFD-020806
Traffic PriorityMapping ontoTransmissionResources
DifferentiatedService Based onSPI Weight
Meaning:TrafficHandling Priority(THP) class that theTHP
priority ismapped to. Thisparameter is valid for only
interactiveservices. Themapping relationshipbetween the
traffic handlingpriority value of INTERACTIVEservice and its
correspondingclass can be setthrough command
"SET
UTHPCLASS".
GUI ValueRange:High,Medium, Low
Actual ValueRange:High,Medium, Low
Unit:None
Default Value:None
THPClass BSC6900
SETUUSERGBR(Mandatory)
WRFD-050424
WRFD-020806
Traffic PriorityMapping ontoTransmissionResources
DifferentiatedService Based onSPI Weight
Meaning:TrafficHandling Priority(THP) class that theTHP
priority ismapped to. Thisparameter is valid for only
interactive
services. The
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Parameter ID NE MML Command Feature ID Feature Name Description
mapping relationshipbetween the
traffic handlingpriority value of INTERACTIVEservice and its
correspondingclass can be setthrough command"SET
UTHPCLASS".
GUI ValueRange:High,Medium, Low
Actual ValueRange:High,Medium, Low
Unit:None
Default Value:None
THPClass BSC6900
SETUUSERHAPPYBR(Mandatory)
WRFD-050424
WRFD-020806
Traffic PriorityMapping ontoTransmissionResources
DifferentiatedService Based onSPI Weight
Meaning:TrafficHandling Priority(THP) class that theTHP
priority ismapped to. Thisparameter is valid for only
interactiveservices. Themapping relationshipbetween the
traffic handling
priority value of INTERACTIVEservice and its
correspondingclass can be setthrough command"SET
UTHPCLASS".
GUI ValueRange:High,
Medium, Low
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Parameter ID NE MML Command Feature ID Feature Name Description
Actual ValueRange:High,Medium, Low
Unit:None
Default Value:None
TrafficClass BSC6900
SETUUSERGBR(Mandatory)
WRFD-050424 Traffic PriorityMapping ontoTransmissionResources
Meaning:Traffic classwhich includes BestEffort(BE) and PTT.BE servicescomprise interactiveservices, backgroundservices, and IMS.
GUI ValueRange:INTERACTIVE, BACKGROUND,IMSSIGNALLING,PTT
Actual ValueRange:INTERACTIVE, BACKGROUND,IMSSIGNALLING,PTT
Unit:None
Default Value:None
TrafficClass BSC6900
SETUUSERHAPPYBR(Mandatory)
WRFD-01061010 HSDPA FlowControl
Meaning:Traffic class
GUI ValueRange:INTERACTIVE, BACKGROUND
Actual ValueRange:INTERACTIVE, BACKGROUND
Unit:None
Default Value:None
TrafficClass BSC6900
SETUSCHEDULEPRIOM AP(Mandatory)
WRFD-050424
WRFD-020806
Traffic PriorityMapping ontoTransmissionResources
DifferentiatedService Based onSPI Weight
Meaning:Trafficclass. Thisparameter onlyapplies to interactiveand backgroundservices, as theScheduling PriorityIndicator (SPI) of the
other classes suchas conversational or
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Parameter ID NE MML Command Feature ID Feature Name Description
streaming areconfigured bydefault.
GUI ValueRange:INTERACTIVE, BACKGROUND
Actual ValueRange:INTERACTIVE, BACKGROUND
Unit:None
Default Value:None
UlCapacitySelect BSC6900 SETUCAPARATERANGE(Optional)
WRFD-020806 DifferentiatedService Based onSPI Weight
Meaning:Method of determining anHSUPA service ratewhen thedifferentiated HSPAservice based on SPIweight function isenabled. Value MBRindicates that theHSUPA service rateis the uplink MBRassigned by the CN.Value Categoryindicates that thepeak ratecorresponding to theUE HSUPA categoryis used. Value Minindicates that thesmaller one betweenMBR and the peakrate corresponding tothe UE HSUPAcategory is used.Value Max indicates
that the greater onebetween MBR andthe peak ratecorresponding to theUE HSUPA categoryis used.
GUI ValueRange:MBR~0
Category~1
Min~2
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Parameter ID NE MML Command Feature ID Feature Name Description
Max
Actual Value
Range:MBR,Category, Min, Max
Unit:None
Default Value:Min
UserPriority BSC6900
SETUUSERGBR(Mandatory)
WRFD-050424 Traffic PriorityMapping ontoTransmissionResources
Meaning:User priority that is definedaccording to the Allocation/RetentionPriority (ARP) fromthe RAB assignment.
The user classes indescending order of priority are Gold,Silver, and Copper.For details, see helpinformation of the"SETUUSERPRIORITY"command.
GUI ValueRange:GOLD,SILVER, COPPER
Actual ValueRange:GOLD,SILVER, COPPER
Unit:None
Default Value:None
UserPriority BSC6900
SETUSCHEDULEPRIOM AP(Mandatory)
WRFD-050424
WRFD-020806
Traffic PriorityMapping ontoTransmissionResources
DifferentiatedService Based onSPI Weight
Meaning:User priority that is definedaccording to the Allocation/RetentionPriority (ARP) fromthe RAB assignment.The user classes indescending order of priority are Gold,Silver, and Copper.For details, see helpinformation of the"SETUUSERPRIORITY"command.
GUI Value
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Parameter ID NE MML Command Feature ID Feature Name Description
Range:GOLD,SILVER, COPPER
Actual ValueRange:GOLD,SILVER, COPPER
Unit:None
Default Value:None
UserPriority BSC6900
SETUUSERHAPPYBR(Mandatory)
WRFD-050424 Traffic PriorityMapping ontoTransmissionResources
Meaning:User priority that is definedaccording to the Allocation/RetentionPriority (ARP) from
the RAB assignment.The user classes indescending order of priority are Gold,Silver, and Copper.For details, see helpinformation of the"SETUUSERPRIORITY"command.
GUI ValueRange:GOLD,SILVER, COPPER
Actual ValueRange:GOLD,SILVER, COPPER
Unit:None
Default Value:None
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Differentiated HSPA Service 10 Counters
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10-1
10 Counters
There are no specific counters associated with this feature.
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Differentiated HSPA Service 11 Glossary
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11 Glossary
For the acronyms, abbreviations, terms, and definitions, see the Glossary .
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Differentiated HSPA Service 12 Reference Documents
12 Reference Documents
None.