CE Overbooking RAN Feature Parameter Description Issue 05 Date 2013-11-30 HUAWEI TECHNOLOGIES CO., LTD.
Jan 17, 2016
CE Overbooking RAN
Feature Parameter Description
Issue 05
Date 2013-11-30
HUAWEI TECHNOLOGIES CO., LTD.
Copyright © Huawei Technologies Co., Ltd. 2013. All rights reserved.
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CE Overbooking Contents
Issue 05 (2013-11-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
ii
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 Technical Principles ................................................................................................................. 3-1
4 CAC Based on NodeB Credit Resources ........................................................................... 4-1
5 Basic Congestion Related to NodeB Credit Resources ................................................. 5-1
6 TTI Selection During PS BE Service Setup or Reconfiguration ................................... 6-1
7 Admission-CE-based Dynamic TTI Adjustment for a Single BE Service over HSUPA ........................................................................................................................................................... 7-1
8 Impact on the Network............................................................................................................. 8-1
8.1 Capacity and Performance ............................................................................................................ 8-1
8.2 Impact on Other Features ............................................................................................................. 8-2
9 Engineering Guidelines ........................................................................................................... 9-1
9.1 When to Use CE Overbooking ...................................................................................................... 9-1
9.2 Information to Be Collected ........................................................................................................... 9-1
9.3 Deployment ................................................................................................................................... 9-1
9.3.1 Deployment Requirements ................................................................................................... 9-1
9.3.2 Data Preparation................................................................................................................... 9-2
9.3.3 Precautions ........................................................................................................................... 9-2
9.3.4 Initial Configuration ............................................................................................................... 9-2
9.3.5 Activation Check ................................................................................................................... 9-2
9.3.6 Feature Deactivation ............................................................................................................ 9-2
9.3.7 Example ................................................................................................................................ 9-2
9.4 Performance Optimization ............................................................................................................. 9-3
9.5 Troubleshooting ............................................................................................................................. 9-5
10 Parameters ............................................................................................................................. 10-1
11 Counters .................................................................................................................................. 11-1
12 Glossary .................................................................................................................................. 12-1
13 Reference Documents ......................................................................................................... 13-1
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CE Overbooking 1 Introduction
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1-1
1 Introduction
1.1 Scope
This document describes WRFD-140212 CE Overbooking, including its technical principles, related features, network impact, and engineering guidelines.
1.2 Intended Audience
This document is intended for personnel who:
Need to understand the features described herein
Work with Huawei products
1.3 Change History
This section provides information about the changes in different document versions. There are two types of changes, which are defined as follows:
Feature change
Changes in features of a specific product version
Editorial change
Changes in wording or addition of information that was not described in the earlier version
05 (2013-11-30)
This issue includes the following changes.
Change Type Change Description Parameter Change
Feature change None None
Editorial change Added one note for hardware dependencies to
section 9.3.1 “Deployment Requirements" and
one activation observation method to section
“9.3.5 Activation Check."
Optimized document description.
None
04 (2013-06-20)
This issue includes the following changes.
Change Type Change Description Parameter Change
Feature change None None
Editorial change Optimized the descriptions in sections 9.1 "When
to Use CE Overbooking" and 9.2 "Information to
Be Collected."
None
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CE Overbooking 1 Introduction
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03 (2012-11-30)
This issue includes the following changes.
Change Type Change Description Parameter Change
Feature change Changed the following description in Table 3-1:
Original:
For HSUPA UEs, the NodeB adjusts the credit resource usage of admitted UEs to be less than or equal to the calculation result of the following formula:
Credit resource usage = Max (Credit resources required for ensuring the GBR, Credit resources required for transmitting one RLC PDU)
If the UEs use a 10 ms TTI, the adjustment is based on the UE rate.
If the UEs use a 2 ms TTI, the adjustment is based on the UE rate and the REVDPARA4 parameter.
Revised:
For HSUPA UEs using a 10 ms TTI, the NodeB adjusts the amount of credit resources consumed by admitted UEs based on the UE data rate. The amount after adjustment does not exceed the amount of credit resources required for transmitting one RLC PDU.
For HSUPA UEs using a 2 ms TTI, the NodeB adjusts the amount of credit resources consumed by admitted UEs based on the UE data rate and the setting of the REVDPARA4 parameter. The amount after adjustment does not exceed the amount of credit resources required for transmitting one RLC PDU.
None.
Editorial change Optimized the description in section 8.1 "Capacity
and Performance."
None.
Optimized the description in section 9.1 "When to
Use CE Overbooking."
None.
Optimized the description in section 9.2
"Information to Be Collected."
None.
02 (2012-07-20)
This issue includes the following changes.
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CE Overbooking 1 Introduction
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Change Type Change Description Parameter Change
Feature change There is a possibility that enabling CE Overbooking increases the admission rejections over the Iub interface. For details of the impact of CE Overbooking, see section 8.1 "Capacity and Performance."
None
Editorial change Added the procedures for deploying features used in this document. For details, see chapter 9 "Engineering Guidelines."
None
01 (2012-04-30)
This issue includes the following changes.
Change Type Change Description Parameter Change
Feature change None None
Editorial change Deleted the original sections 8.2 "Hardware" and 9.3 "Network Planning". These sections describe hardware dependency of the feature, which are described in the Configuring CE Overbooking in Feature Activation Guide.
None
Optimized the descriptions about credit resource consumption of admitted UEs with CE Overbooking enabled. For details, see Table 3-1 in chapter 3 "Technical Principles."
None
Draft A (2012-02-15)
This document is created for RAN14.0.
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CE Overbooking 2 Overview
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2 Overview
After WRFD-010638 Dynamic CE Resource Management is applied, the RNC calculates the credit resource usage of an admitted HSUPA UE by using the following formula:
Credit resource usage = Max (Credit resources required for ensuring the GBR, Credit resources required for transmitting one RLC PDU)
In the preceding formula, GBR stands for guaranteed bit rate and RLC PDU stands for Radio Link Control packet data unit. The RNC performs this calculation to ensure HSUPA user experience. However, the actual CE usage of the NodeB is lower than the calculated credit resource usage of the RNC. This is because the NodeB calculates the actual CE usage based on the UE rate. The UE rate is lower than the GBR or the rate at which an RLC PDU is transmitted in most cases due to the high penetration rate of smart phones with a 2 ms HSUPA transmission time interval (TTI). As a result, the RNC may reject new UE access attempts even if the actual CE usage of the NodeB is low. This limits the RNC's capability to perform admission control based on credit resource usage.
To enhance the RNC capability, you can use the CE Overbooking feature. With this feature, the NodeB calculates the actual CE usage of admitted UEs, includes the calculated CE usage in a private information element (IE) in the Common Measurement Report message, and sends the report to the RNC every measurement report period that is configured by the TenMsecForUlBasicMeas parameter. The RNC then directly uses the reported CE usage as the credit resource usage. This maximizes the RNC's capability to perform admission control based on credit resource usage.
When the penetration rate of smart phones with a 2 ms HSUPA TTI is high, the average HSUPA service throughput is low, and this feature provides the following benefits:
Reduces the credit resource usage of admitted UEs.
Increases the number of admitted UEs and the number of HSUPA UEs with a 2 ms TTI.
Increases the cell uplink throughput when Uu and Iub resources are sufficient.
Figure 2-1 shows the working principles of CE Overbooking.
Figure 2-1 CE Overbooking
This feature applies only to uplink CE resources.
Before enabling this feature, Dynamic CE Resource Management must be enabled. For details about Dynamic CE Resource Management, see the HSUPA Feature Parameter Description.
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CE Overbooking 2 Overview
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NOTE
If layer 2 enhancement is enabled, the size of the RLC PDU provided in the preceding formula equals that of the smallest RLC PDU. If layer 2 enhancement is disabled, the size of the RLC PDU is fixed. For details about the RLC PDU size, see the HSPA Evolution Feature Parameter Description.
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CE Overbooking 3 Technical Principles
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3 Technical Principles
CE Overbooking is under NodeB license control and has no switch parameter on the RNC or NodeB side.
The credit resource usage that the NodeB periodically calculates and reports to the RNC involves the credit resource usage of R99 UEs and that of HSUPA UEs.
Table 3-1 describes the methods for calculating the credit resource usage before and after this feature is activated and presumes that the Dynamic CE Resource Management feature has been enabled.
Table 3-1 Credit resource calculation methods before and after activating this feature
CE Overbooking
Credit Resources Consumed by Admitted UEs
Not activated The RNC calculates the amount of credit resources consumed by admitted UEs as follows:
For R99 UEs, the RNC calculates the amount of credit resources consumed by admitted UEs based on the maximum bit rate (MBR).
For HSUPA UEs, the RNC calculates the amount of credit resources consumed by admitted UEs using the following formula:
Amount of credit resources consumed by admitted UEs = Max (Amount of credit resources required for ensuring the GBR, Amount of credit resources required for transmitting one RLC PDU)
Activated The NodeB calculates the amount of credit resources consumed by admitted UEs as follows:
For R99 UEs, the NodeB calculates the amount of credit resources consumed by admitted UEs based on the MBR.
For HSUPA UEs using a 10 ms TTI, the NodeB adjusts the amount of credit resources consumed by admitted UEs based on the UE data rate. The amount after adjustment does not exceed the amount of credit resources required for transmitting one RLC PDU.
For HSUPA UEs using a 2 ms TTI, the NodeB adjusts the amount of credit resources consumed by admitted UEs based on the UE data rate and the setting of the REVDPARA4 parameter. The amount after adjustment does not exceed the amount of credit resources required for transmitting one RLC PDU.
NOTE
REVDPARA4 indicates the minimum CE reserved for admitted 2 ms TTI HSUPA UE. Its
value rang is 1 to 8 with the default value of 4 (unit: CE). If this parameter is set to a value beyond its value range, the system uses the default parameter value. A smaller value of this parameter leads to a larger number of admitted users. In this case, the call drop rate may increase and user experience cannot be guaranteed. A larger value of this parameter leads to a smaller number of admitted users. In this case, the call drop rate does not increase and user experience can be guaranteed.
In the uplink, one CE equals two credits.
In the downlink, one CE equals one credit.
This feature reduces the credit resource usage of admitted UEs and increases the remaining credit resources. This has the following advantages:
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CE Overbooking 3 Technical Principles
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More UEs can be admitted.
More HSUPA UEs are assigned with 2 ms TTI during a PS best effort (BE) service setup or reconfiguration.
Basic congestion of credit resources is relieved.
The probability of admission-CE-based dynamic TTI adjustment from 2 ms to 10 ms for BE services is reduced.
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CE Overbooking 4 CAC Based on NodeB Credit Resources
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4 CAC Based on NodeB Credit Resources
When receiving a service setup request, the RNC makes an admission decision based on credit resources as follows:
For a radio resource control (RRC) connection setup request, the admission is successful if the remaining credit resources at the local cell group (if any) and NodeB levels are sufficient for the RRC connection setup.
For a handover service, the admission is successful if the remaining credit resources at the local cell group (if any) and NodeB levels are sufficient for the handover service.
For other services, the RNC must check that the amount of the remaining credit resources at the local cell
group (if any) and NodeB levels is greater than or equal to UlHoCeResvSf after new services are admitted.
If so, the admission is successful.
CE Overbooking performs service admission and optimization based on the preceding decision procedure. Activating CE Overbooking brings the following advantages:
The NodeB-reported credit resources consumed by admitted users decrease and therefore the remaining credit resources on the RNC increase, indicating that the RNC can admit and serve more users.
The NodeB baseband board uses different processing specifications for users with different uplink bearer services, for example, HSUPA TTI 2 ms services, HSUPA TTI 10 ms services, and R99 services. CE Overbooking enables the network to admit more users. Therefore, it is good practice to enable RESERVED_SWITCH_1_BIT5 of RsvSwitch1. When multiple users access the network,
If RsvSwitch1:RESERVED_SWITCH_1_BIT5 is disabled, the system attempts to admit all new users using the highest service bearers supported by the terminal. In this way, accessed users occupy too many uplink processing specifications and therefore the total number of accessed users decreases.
If RsvSwitch1:RESERVED_SWITCH_1_BIT5 is enabled, the NodeB baseband board dynamically selects proper uplink service bearers for users to maximize the number of accessed users according to actual NodeB processing specifications. If NodeB baseband board load higher than 82%, new user supporting 2ms TTI is only allowed to setup in 10ms TTI. If NodeB baseband board load higher than 87%,new user supporting HSUPA is only allowed to setup in R99.
For details about Call Admission Control (CAC) based on NodeB credit resources, see the Call Admission Control Feature Parameter Description.
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CE Overbooking
5 Basic Congestion Related to NodeB Credit
Resources
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5 Basic Congestion Related to NodeB Credit Resources
Basic congestion at the local cell group or NodeB level is triggered when the following condition is met:
Remaining uplink credit resources at the local cell group or NodeB level < Credit resources mapped to UlLdrCreditSfResThd.
where
UlLdrCreditSfResThd can be set by running the MML command ADD UNODEBLDR.
CE Overbooking brings the following advantages:
Increases the remaining uplink credit resources.
Relieves basic congestion because the preceding condition is less likely to be met.
For details about basic congestion related to NodeB credit resources, see the Load Control Feature Parameter Description.
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CE Overbooking
6 TTI Selection During PS BE Service Setup or
Reconfiguration
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6 TTI Selection During PS BE Service Setup or Reconfiguration
When a PS BE service is set up or reconfigured, TTI selection is implemented. The TTI for an HSUPA UE is set to 2 ms if all the following conditions are met:
The UE and the NodeB support 2 ms TTI.
MAP_HSUPA_TTI_2MS_SWITCH under the MapSwitch parameter is set to ON.
Credit resources are sufficient.
If DRA_BASE_RES_BE_TTI_RECFG_SWITCH and DRA_BASE_RES_BE_TTI_INIT_SEL_SWITCH under the DraSwitch parameter are set to ON, one of the following conditions must be met:
− The ResourceOption parameter is set to RTWP, and the Uu resources are sufficient.
− The ResourceOption parameter is set to Iub, and the Iub resources are sufficient.
− The ResourceOption parameter is set to CE, and the CE resources are sufficient.
The MBR of the UE is greater than or equal to BeHsupa2msTtiRateThs.
CE Overbooking brings the following advantages:
− Increases the remaining uplink credit resources.
− Increases the number of HSUPA UEs with a 2 ms TTI. Compared with 10 ms TTI, 2 ms TTI enables HSUPA UEs to achieve a higher peak rate and a shorter scheduling delay, which improves user experience.
For details about dynamic TTI adjustment, see the HSUPA TTI Selection Feature Parameter Description.
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CE Overbooking
7 Admission-CE-based Dynamic TTI Adjustment for
a Single BE Service over HSUPA
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7 Admission-CE-based Dynamic TTI Adjustment for a Single BE Service over HSUPA
The TTI for an HSUPA UE processing BE services is switched from 2 ms to 10 ms when all the following conditions are met:
The credit resources at the local cell group or NodeB level are smaller than those specified by UlTtiCreditSfResThd, indicating that the credit resources are insufficient.
The UE throughput is lower than the product of UpRatioFor2msTo10msBaseCE and BeHsupa2msTtiRateThs.
CE Overbooking brings the following advantages:
Increases the remaining uplink credit resources.
Reduces the probability of admission-CE-based dynamic TTI adjustment from 2 ms to 10 ms.
After CE Overbooking is activated, it is recommended that DRA_BASE_ADM_CE_BE_TTI_RECFG_SWITCH under the DraSwitch parameter be set to ON. If DRA_BASE_ADM_CE_BE_TTI_RECFG_SWITCH is set to ON, the TTI for an HSUPA UE can be switched from 2 ms to 10 ms when CE resources are congested. If DRA_BASE_ADM_CE_BE_TTI_RECFG_SWITCH is not set to ON, CE resources may be insufficient to transmit one RLC PDU, which may result in Traffic Radio Bearer (TRB) reset and increase the call drop rate.
For details about dynamic TTI adjustment, see the HSUPA TTI Selection Feature Parameter Description.
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CE Overbooking 8 Impact on the Network
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8 Impact on the Network
8.1 Capacity and Performance
System Capacity
CE Overbooking reduces the uplink credit resources consumed by online users. In cells with a large number of HSUPA UEs with a 2 ms TTI, this feature reduces the uplink credit resource consumption by 10% to 40%. A cell is regarded as having a large number of HSUPA UEs with a 2 ms TTI when the average number of these UEs is greater than or equal to 5.
This feature impacts on system capacity in the following scenarios:
In scenarios where a large number of admission rejections occur due to severe congestion of uplink credit resources, CE Overbooking enables more UEs to be admitted. CE Overbooking also increases the average cell throughput if Uu and Iub resources are sufficient.
In scenarios where TTI switching or load reshuffling (LDR) frequently occurs due to basic congestion of uplink credit resources, CE Overbooking reduces the number of TTI switching or LDR events or increases the number of HSUPA UEs with a 2 ms TTI.
In scenarios where uplink credit resources are sufficient, CE Overbooking increases remaining credit resources.
Network Performance
CE Overbooking has the following impact on network performance:
In scenarios where a large number of admission rejections occur due to severe congestion of uplink credit resources, CE Overbooking allows more UEs to be admitted and increases the radio access success rate. (This is because CE Overbooking takes the uplink traffic volume into consideration when calculating the remaining credit resources, therefore increasing the availability of credit resources.) However, when more UEs transmit data simultaneously, the HSUPA call drop rate may increase due to congestion of CE and Uu resources.
In scenarios where TTI switching or LDR frequently occurs due to basic congestion of uplink credit resources, the number of HSUPA UEs with a 2 ms TTI increases because CE Overbooking increases the availability of credit resources. However, HSUPA UEs with a 2 ms TTI have poorer anti-interference capabilities than HSUPA UEs with a 10 ms TTI. Therefore, the call drop rate may increase in poor coverage because HSUPA UEs with a 2 ms TTI are more vulnerable to call drops than HSUPA UEs with a 10 ms TTI.
NOTE
After CE Overbooking is enabled, the amount of credit resources consumed by admitted UEs is related to the actual UE rate. If the amount of credit resources consumed by admitted UEs is large due to high actual UE rate, the handover success rate and the RRC connection setup success rate may decrease because the reserved resources may be consumed by admitted UEs. This problem has a low probability of occurrence and network performance is generally not affected.
After CE Overbooking is enabled, there is a possibility that admission rejections increase over the Iub interface if a large number of UEs has accessed the network. However, CE Overbooking does not affect the UE access success rate.
Before CE Overbooking is enabled, the RNC updates the consumption of CE resources for UE admission upon UE access or release.
After CE Overbooking is enabled, the NodeB updates the consumption of CE resources for UE admission and reports to the RNC every 1s. During the report interval, the RNC cannot learn about the accurate consumption of CE resources, resulting in information inconsistency between the RNC and the NodeB. Therefore, there is a possibility that some UEs are admitted by the RNC but fail to be admitted by the NodeB.
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8.2 Impact on Other Features
CE Overbooking depends on WRFD-010638 Dynamic CE Resource Management.
CE Overbooking allows an excessive number of UEs to be admitted and therefore cannot reserve sufficient credit resources to guarantee GBR for the admitted UEs. The amount of reserved credit resources is calculated as follows:
Amount of reserved credit resource = Max (Amount of credit resources required for ensuring the GBR, Amount of credit resources required for transmitting one RLC PDU)
For example, when there are many 2 ms HSUPA UEs and multiple 2 ms HSUPA UEs transmit data at the same time, call drops may occur. However, if TTI selection is applied with CE Overbooking, the TTI for HSUPA UEs can be switched from 2 ms to 10 ms in this situation to reduce the call drop rate. Therefore, it is recommended that CE Overbooking be used with Admission-CE-based Dynamic TTI Adjustment for a Single BE Service over HSUPA.
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CE Overbooking 9 Engineering Guidelines
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9 Engineering Guidelines
9.1 When to Use CE Overbooking
To improve RNC's capability to perform admission control based on credit resource usage, CE Overbooking should be enabled in a network that meets all the following conditions:
There are a large number of smart phones, especially HSUPA UEs with a 2 ms TTI.
Credit resources are insufficient.
The HSUPA throughput of cells under the NodeB is low.
The RAN has rejected the access request of a UE due to uplink credit resource congestion.
The average data rate of HSUPA UEs with a 2 ms TTI is less than or equal to 150 kbit/s.
9.2 Information to Be Collected
Before deploying CE Overbooking, collect the values of the following counters on the live network:
VS.HSUPA.UE.Mean.CATx (x ≥ 6): measures the number of HSUPA UEs that support the 2 ms TTI in a cell. When there are a large number of HSUPA UEs with a 2 ms TTI in a cell, this feature provides noticeable gains. A cell is regarded as having a large number of these UEs when the average number of these UEs is greater than or equal to 5.
VS.LC.ULCreditUsed.Mean: measures the uplink credit resource usage in a cell. When the uplink credit resource usage of a cell is high, more than 70% of the purchased credit resources are used. In this case, uplink credit resource congestion will easily occur.
VS.LCC.LDR.Num.ULCE: measures the number of LDR events triggered by uplink credit resource congestion in a cell. When the counter value is large, uplink credit resources are experiencing severe congestion.
VS.HSUPA.TTI2to10.ADMCE.Succ: measures the number of TTI switching events triggered by uplink credit resource congestion in a cell. When the counter value is large, uplink credit resources are experiencing severe congestion.
VS.HSUPA.RABEstabTTI10ms.AdmCE.Succ: measures the number of successful RAB establishments for TTI switching from 2 ms to 10 ms triggered by uplink credit resource congestion in a cell. When the counter value is large, CE resources are experiencing severe congestion.
VS. RAB.FailEstabPS.ULCE.Cong and VS.RAB.FailEstabCS.ULCE.Cong: measure the number of admission rejections triggered by uplink credit resource congestion in a cell. When the counter value is large, CE resources are experiencing severe congestion.
9.3 Deployment
9.3.1 Deployment Requirements
Dependencies on Hardware
− The 3900 series base station must be configured with the WBBPb, WBBPd, or WBBPf board.
− The DBS3800 must be configured with the EBBC or EBBCd board.
− The BTS3812E, BTS3812A, and BTS3812AE must be configured with the EBBI, EBOI, or EULPd board.
NOTE
The CE Overbooking feature can still be activated on a NodeB when the NodeB is not configured as
above. However, this feature is beneficial only when the NodeB is configured as above.
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Dependencies on Other Features
Before enabling this feature, the feature WRFD-010638 Dynamic CE Resource Management must be enabled.
License
The license "CE overbooking(Per NodeB)" on the NodeB side has been activated. For details about the license items and how to activate the license, see License Management Feature Parameter Description.
9.3.2 Data Preparation
None
9.3.3 Precautions
This feature should be used with Huawei professional services.
9.3.4 Initial Configuration
Perform the following steps to activate CE Overbooking:
Step 1 After the license is activated, the feature has been activated.
Step 2 (Optional)Run the following MML command SET NODEBRSVP to set the minimum number of CEs required for admitting an HSUPA UE with a 2 ms TTI on the NodeB LMT. In this step, set Reserved Parameter 4(REVDPARA4).
Step 3 (Optional) Run the RNC MML command SET UALGORSVPARA. In this step, select the
RESERVED_SWITCH_1_BIT5 check box in the Reserved Switch 1 parameter.
NOTE
It is good practice to retain the default value of Reserved Parameter 4 (REVDPARA4).
It is good practice to set the parameter in step 2 so that the network can admit more users.
--END
9.3.5 Activation Check
Perform either of the following operations to check whether the CE Overbooking feature has been successfully activated:
Check whether the value of the new counter VS.NodeB.ULCreditUsed.Mean, VS.NodeB.ULCreditUsed.Max or VS.NodeB.ULCreditUsed.Min is not 0. If so, this feature has been successfully activated.
Start an Iub interface tracing task on an RNC LMT. In the tracing results, check whether the NBAP_AUDIT_RSP message contains the "cE-overbooking-capable" IE. If so, this feature has been successfully activated.
9.3.6 Feature Deactivation
Deactivate the license for CE Overbooking on the M2000.
9.3.7 Example
//Setting the minimum number of CEs required for admitting an HSUPA UE with a 2 ms TTI
SET NODEBRSVP: REVDPARA4=4;
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9.4 Performance Optimization
Monitoring
Monitor the following items:
Credit resources consumed by admitted UEs
Check the counters in Table 9-1 to obtain the credit resource usages after CE Overbooking is activated.
Table 9-1 Credit resource usages after CE Overbooking is activated
Counter Description
VS.NodeB.ULCreditUsed.Mean Average NodeB Credit Usage When CE Overbooking Is Enabled
VS.NodeB.ULCreditUsed.Max Maximum NodeB Credit Usage When CE Overbooking Is Enabled
VS.NodeB.ULCreditUsed.Min Minimum NodeB Credit Usage When CE Overbooking Is Enabled
The difference between VS.NodeB.ULCreditUsed.Mean and VS.LC.ULCreditUsed.Mean is as follows:
− VS.NodeB.ULCreditUsed.Mean measures the usage of credit resources consumed by admitted UEs after CE Overbooking is activated.
− VS.LC.ULCreditUsed.Mean measures the usage of credit resources consumed by admitted UEs. This counter is measured regardless of whether CE Overbooking is activated.
When CE Overbooking takes effect, the value of VS.NodeB.ULCreditUsed.Mean for a NodeB is smaller than the sum of VS.LC.ULCreditUsed.Mean for all cells under this NodeB.
CE-based access success rate
After CE Overbooking is activated on a network with a low average HSUPA throughput, the CE-based access success rate of the network increases.
Use the following formula to calculate the CE-based access success rate:
CE-based access success rate = 1 – {(VS. RAB.FailEstabPS.ULCE.Cong + VS. RAB.FailEstabCS.ULCE.Cong)/Total number of RAB establishment attempts in the cell}
The total number of RAB establishment attempts in the cell is the sum of the values of the counters in Table 9-2.
Table 9-2 Counters measuring the number of RAB establishment attempts for each type of service in the cell
Counter Description
VS.RAB.AttEstabPS.Conv Number of PS Conversational RAB Establishment Attempts for Cell
VS.RAB.AttEstabPS.Bkg Number of PS Background RAB Establishment Attempts for Cell
VS.RAB.AttEstabPS.Int Number of PS Interactive RAB Establishment Attempts for Cell
VS.RAB.AttEstabPS.Str Number of PS Streaming RAB Establishment Attempts for Cell
VS.RAB.SuccEstabCS.Conv Number of CS Conversational RAB Establishment Requests for
Cell
VS.RAB.SuccEstabCS.Str Number of CS Streaming RAB Establishment Requests for Cell
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Local cell group credit utilization
Table 9-3 lists local cell group (LCG)-level credit utilization when CE Overbooking takes effect. The larger the counter value, the more severe the LCG-level credit congestion is.
Table 9-3 Counters measuring the LCG-level credit utilization
Counter Description
VS.Reserve.Counter14/ VS.Reserve.Counter15/1000*100%
LCG-level uplink average credit utilization for a cell when CE Overbooking takes effect
Number of HSUPA UEs with a 2 ms TTI
After activating CE Overbooking on a network with a low average HSUPA throughput, check the counter in Table 9-4 to determine whether the number of HSUPA UEs with a 2 ms TTI increases.
Table 9-4 Counter measuring the average number of HSUPA UEs with a 2 ms TTI
Counter Description
VS.HSUPA.UE.Mean.TTI2ms Average number of 2 ms HUSPA users
VS.HSUPA.UE.Mean.Cell Average Number of HSUPA UEs in a Cell
VS.CellDCHUEs Number of UEs in CELL_DCH State for Cell
LDR events caused by CE congestion
After activating CE Overbooking on a network with a low average HSUPA throughput, check the counter in Table 9-5 to determine whether the number of LDR events caused by CE congestion decreases.
Table 9-5 Counter measuring the number of LDR events caused by CE congestion
Counter Description
VS.LCC.LDR.Num.ULCE Number of Times a Cell Is in LDR State Due to UL CE Resource Congestion for Cell
Load on the Uu interface
After activating CE Overbooking on a network with a low average HSUPA throughput, check the counter in Table 9-6 to determine whether the load on the Uu interface increases.
Table 9-6 Counter measuring the mean received total wideband power in the cell
Counter Description
VS.MeanRTWP Mean Power of Totally Received Bandwidth for Cell
Average cell throughput
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After activating CE Overbooking on a network with a low average HSUPA throughput and sufficient Uu and Iub resources, check the counter in Table 9-7 to determine whether the average cell throughput increases.
Table 9-7 Counter measuring the average cell throughput
Counter Description
VS.HSUPA.MeanBitRate Average Throughput of HSUPA Users for Cell
Parameter Optimization
If the call drop rate increases due to insufficient CE resources after this feature is enabled, it is recommended that REVDPARA4 be set to a larger value.
9.5 Troubleshooting
None.
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10-1
10 Parameters
Table 10-1 Parameter description
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
BeHsupa2msTtiRateThs
BSC6900
SET UFRC
WRFD-01061206
WRFD-01061403
Interactive and Background Traffic Class on HSUPA
HSUPA 2ms TTI
Meaning:This parameter specifies the rate threshold of 2ms TTI on the E-DCH for HSUPA BE service. When the cell capability and UE capability allows 2ms TTI, 2ms TTI on the E-DCH is used if the PS BE service carried on HSUPA with uplink rate isn't less than this threshold. Otherwise, 10ms TTI is used.
GUI Value Range:D8, D16, D32, D64, D128, D144, D256, D384, D608, D1280, D2048, D2720
Actual Value Range:8, 16, 32, 64, 128, 144, 256, 384, 608, 1280, 2048, 2720
Unit:kbit/s
Default Value:D1280
DraSwitch
BSC6900
SET UCORRMALGOSWITCH
WRFD-01061111
WRFD-01061208
WR
HSDPA State Transition
HSUPA
Meaning:Dynamic resource allocation switch group.
1. DRA_AQM_SWITCH: When the switch is on, the active queue management algorithm is used for the BSC6900.
2. DRA_BASE_ADM_CE_BE_TTI_L2_OPT_SWITCH: When the switch is on, the TTI dynamic adjustment algorithm for admission CE-based BE services applies to the UE with the UL enhanced L2 feature. This parameter is valid when DRA_BASE_ADM_CE_BE_TTI_RECFG_SWITCH(DraSwitch) is set to ON.
3. DRA_BASE_ADM_CE_BE_TTI_RECFG_SWITCH: When the switch is on, the TTI dynamic adjustment algorithm is supported for admission CE-based BE services.
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Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
FD-01061404
WRFD-011502
WRFD-021101
WRFD-050405
WRFD-050408
WRFD-010690
WRFD-01061403
WRFD-010202
DCCC
HSUPA 2ms/10ms TTI Handover
Active Queue Management (AQM)
Dynamic Channel Configuration Contr
4. DRA_BASE_COVER_BE_TTI_L2_OPT_SWITCH: When the switch is on, the TTI dynamic adjustment algorithm for coverage-based BE services applies to the UE with the UL enhanced L2 feature. This parameter is valid when DRA_BASE_COVER_BE_TTI_RECFG_SWITCH(DraSwitch) is set to ON.
5. DRA_BASE_COVER_BE_TTI_RECFG_SWITCH: When the switch is on, the TTI dynamic adjustment algorithm is supported for coverage-based BE services.
6. DRA_BASE_RES_BE_TTI_L2_OPT_SWITCH: When the switch is on, the TTI dynamic adjustment algorithm for differentiation-based BE services applies to the UE with the UL enhanced L2 feature. This parameter is valid when DRA_BASE_RES_BE_TTI_RECFG_SWITCH(DraSwitch) is set to ON.
7. DRA_BASE_RES_BE_TTI_RECFG_SWITCH: When the switch is on, the TTI dynamic adjustment algorithm is supported for differentiation-based BE services.
8. DRA_DCCC_SWITCH: When the switch is on, the dynamic channel reconfiguration control algorithm is used for the BSC6900.
9. DRA_HSDPA_DL_FLOW_CONTROL_SWITCH: When the switch is on, flow control is enabled for HSDPA services in AM mode.
10. DRA_HSDPA_STATE_TRANS_SWITCH: When the switch is on, the status of the UE RRC that carrying HSDPA services can be changed to CELL_FACH at the BSC6900. If a PS BE service is carried over the HS-DSCH, the switch PS_BE_STATE_TRANS_SWITCH should be on simultaneously. If a PS real-time service is carried over the HS-DSCH, the switch PS_NON_BE_STATE_TRANS_SWITCH should be on simultaneously.
11. DRA_HSUPA_DCCC_SWITCH: When the switch is on, the DCCC algorithm is used for HSUPA. The DCCC switch must be also on before this switch takes effect.
12. DRA_HSUPA_STATE_TRANS_SWITCH: When the switch is on, the status of the UE RRC that carrying HSUPA services can be changed to CELL_FACH at the BSC6900. If a PS BE service is carried over the E-DCH, the switch PS_BE_STATE_TRANS_SWITCH should be on simultaneously. If a PS real-time service is carried over the E-DCH, the switch PS_NON_BE_STATE_TRANS_SWITCH should be on simultaneously.
13. DRA_IP_SERVICE_QOS_SWITCH: Switch of the algorithm for increasing the quality of subscribed services. When this parameter is set to ON, the service priority weight of the subscriber whose key parameters (IP Address, IP Port, and IP Protocol Type) match the specified ones can be adjusted. In this way, the QoS is improved.
14. DRA_PS_BE_STATE_TRANS_SWITCH: When the switch is on, UE RRC status transition (CELL_FACH/CELL_PCH/URA_PCH) is allowed at the BSC6900.
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Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
ol (DCCC)
Overbooking on ATM Transmission
Overbooking on IP Transmission
TTI Switch for BE Services Based on
15. DRA_PS_NON_BE_STATE_TRANS_SWITCH: When the switch is on, the status of the UE RRC that carrying real-time services can be changed to CELL_FACH at the BSC6900.
16. DRA_R99_DL_FLOW_CONTROL_SWITCH: Under a poor radio environment, the QoS of high speed services drops considerably and the TX power is overly high. In this case, the BSC6900 can set restrictions on low data rate transmission formats based on the transmission quality, thus lowering traffic speed and TX power. When the switch is on, the R99 downlink flow control function is enabled.
17. DRA_THROUGHPUT_DCCC_SWITCH: When the switch is on, the DCCC based on traffic statistics is supported over the DCH.
18. DRA_VOICE_SAVE_CE_SWITCH: when the switch is on, the TTI selection based on the voice service type (including VoIP and CS over HSPA) is supported when the service is initially established.
19. DRA_VOICE_TTI_RECFG_SWITCH: when the switch is on, the TTI adjustment based on the voice service type (including VoIP and CS over HSPA) is supported.
20. DRA_CSPS_NO_PERIOD_RETRY_SWITCH: Whether to prohibit channel retries for CS and PS combined services. When this switch is turned on, channel retries are prohibited for CS and PS combined services. When this switch is turned off, channel retries are allowed for CS and PS combined services.
21. DRA_SMART_FAST_STATE_TRANS_SWITCH: Whether to activate the fast state transition algorithm. When this switch is turned on, the BSC6900 identifies UEs supporting fast state transition and then quickly transits the UEs from CELL_DCH to CELL_FACH.
22. DRA_PCH_UE_SMART_P2D_SWITCH: Whether to activate the algorithm for smart PCH-to-DCH state transition specific to UEs in the CELL_PCH or URA_PCH state. When this switch is turned on, the BSC6900 identifies UEs supporting smart PCH-to-DCH state transition and then transits the UEs from CELL_PCH or URA_PCH to CELL_DCH.
23. DRA_BASE_RES_BE_TTI_INIT_SEL_SWITCH: Whether initial TTI selection is allowed for differentiated BE services based on fairness
0: This switch is turned off. The TTI is selected according to the original algorithm.
1: This switch is turned on. In the dynamic TTI adjustment algorithm for differentiated BE services based on fairness, HSUPA UEs use 10-ms TTI if the RTWP, occupied Iub bandwidth, or consumed CE resources are congested.
24. DRA_BASE_COVER_BE_TTI_INIT_SEL_SWITCH: Whether to activate the coverage-based initial TTI selection algorithm specific to BE services. When this switch is turned on and conditions on 2 ms TTI specific to BE services has been
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Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
Coverage
HSUPA 2ms TTI
UE State in Connected Mode (CELL-DCH, CELL-PCH, URA-PCH, CELL-FACH)
met, the BSC6900 determines uplink coverage wideness of specific cells based on the Ec/N0 values reported by UEs during RRC connection. If the uplink coverage of the cells is weak, the BSC6900 allocates a 10 ms TTI to BE services as their initial TTI.
25. DRA_F2U_SWITCH: Whether to enable state transition from CELL_FACH to URA_PCH.When this switch is turned on, a UE can directly move from the CELL_FACH to URA_PCH state. When this switch is turned off, a UE must move from the CELL_FACH to CELL_PCH and then to URA_PCH state.
GUI Value Range:DRA_AQM_SWITCH, DRA_BASE_ADM_CE_BE_TTI_L2_OPT_SWITCH, DRA_BASE_ADM_CE_BE_TTI_RECFG_SWITCH, DRA_BASE_COVER_BE_TTI_L2_OPT_SWITCH, DRA_BASE_COVER_BE_TTI_RECFG_SWITCH, DRA_BASE_RES_BE_TTI_L2_OPT_SWITCH, DRA_BASE_RES_BE_TTI_RECFG_SWITCH, DRA_DCCC_SWITCH, DRA_HSDPA_DL_FLOW_CONTROL_SWITCH, DRA_HSDPA_STATE_TRANS_SWITCH, DRA_HSUPA_DCCC_SWITCH, DRA_HSUPA_STATE_TRANS_SWITCH, DRA_IP_SERVICE_QOS_SWITCH, DRA_PS_BE_STATE_TRANS_SWITCH, DRA_PS_NON_BE_STATE_TRANS_SWITCH, DRA_R99_DL_FLOW_CONTROL_SWITCH, DRA_THROUGHPUT_DCCC_SWITCH, DRA_VOICE_SAVE_CE_SWITCH, DRA_VOICE_TTI_RECFG_SWITCH, DRA_CSPS_NO_PERIOD_RETRY_SWITCH, DRA_SMART_FAST_STATE_TRANS_SWITCH, DRA_PCH_UE_SMART_P2D_SWITCH, DRA_BASE_RES_BE_TTI_INIT_SEL_SWITCH, DRA_BASE_COVER_BE_TTI_INIT_SEL_SWITCH, DRA_F2U_SWITCH
Actual Value Range:DRA_AQM_SWITCH, DRA_BASE_ADM_CE_BE_TTI_L2_OPT_SWITCH, DRA_BASE_ADM_CE_BE_TTI_RECFG_SWITCH, DRA_BASE_COVER_BE_TTI_L2_OPT_SWITCH, DRA_BASE_COVER_BE_TTI_RECFG_SWITCH, DRA_BASE_RES_BE_TTI_L2_OPT_SWITCH, DRA_BASE_RES_BE_TTI_RECFG_SWITCH, DRA_DCCC_SWITCH, DRA_HSDPA_DL_FLOW_CONTROL_SWITCH, DRA_HSDPA_STATE_TRANS_SWITCH, DRA_HSUPA_DCCC_SWITCH, DRA_HSUPA_STATE_TRANS_SWITCH, DRA_IP_SERVICE_QOS_SWITCH, DRA_PS_BE_STATE_TRANS_SWITCH, DRA_PS_NON_BE_STATE_TRANS_SWITCH, DRA_R99_DL_FLOW_CONTROL_SWITCH, DRA_THROUGHPUT_DCCC_SWITCH, DRA_VOICE_SAVE_CE_SWITCH, DRA_VOICE_TTI_RECFG_SWITCH, DRA_CSPS_NO_PERIOD_RETRY_SWITCH, DRA_SMART_FAST_STATE_TRANS_SWITCH,
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Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
DRA_PCH_UE_SMART_P2D_SWITCH, DRA_BASE_RES_BE_TTI_INIT_SEL_SWITCH, DRA_BASE_COVER_BE_TTI_INIT_SEL_SWITCH, DRA_F2U_SWITCH
Unit:None
Default Value:DRA_AQM_SWITCH-0&DRA_BASE_ADM_CE_BE_TTI_L2_OPT_SWITCH-0&DRA_BASE_ADM_CE_BE_TTI_RECFG_SWITCH-1&DRA_BASE_COVER_BE_TTI_L2_OPT_SWITCH-0&DRA_BASE_COVER_BE_TTI_RECFG_SWITCH-0&DRA_BASE_RES_BE_TTI_L2_OPT_SWITCH-0&DRA_BASE_RES_BE_TTI_RECFG_SWITCH-1&DRA_DCCC_SWITCH-1&DRA_HSDPA_DL_FLOW_CONTROL_SWITCH-0&DRA_HSDPA_STATE_TRANS_SWITCH-0&DRA_HSUPA_DCCC_SWITCH-1&DRA_HSUPA_STATE_TRANS_SWITCH-0&DRA_IP_SERVICE_QOS_SWITCH-0&DRA_PS_BE_STATE_TRANS_SWITCH-1&DRA_PS_NON_BE_STATE_TRANS_SWITCH-0&DRA_R99_DL_FLOW_CONTROL_SWITCH-0&DRA_THROUGHPUT_DCCC_SWITCH-0&DRA_VOICE_SAVE_CE_SWITCH-0&DRA_VOICE_TTI_RECFG_SWITCH-0&DRA_CSPS_NO_PERIOD_RETRY_SWITCH-0&DRA_SMART_FAST_STATE_TRANS_SWITCH-0&DRA_PCH_UE_SMART_P2D_SWITCH-0&DRA_BASE_RES_BE_TTI_INIT_SEL_SWITCH-0&DRA_BASE_COVER_BE_TTI_INIT_SEL_SWITCH-0&DRA_F2U_SWITCH-0
MapSwitch
BSC6900
SET UCORRMALGOSWITCH
WRFD-01061403
WRFD-010630
WRFD-010632
WRFD-010688
WRFD-010614
HSUPA 2ms TTI
Streaming Traffic Class on HSDPA
Strea
Meaning:Service mapping strategy switch group.
1) MAP_HSUPA_TTI_2MS_SWITCH: When the switch is on, 2 ms TTI is supported for HSUPA.
2) MAP_INTER_RAT_PS_IN_CHANLE_LIMIT_SWITCH: When the switch is on, the PS services are transmitted on the DCH during the 2G-to-3G handover. When the switch is not on, the PS services can be transmitted on suitable channels according to the algorithm parameter configured for the RNC during the 2G-to-3G handover.
3) MAP_PS_BE_ON_E_FACH_SWITCH: When the switch is on, the PS BE services can be transmitted on the E-FACH(E-FACH for downlink and RACH for uplink, or E-FACH for downlink and E-RACH for uplink).
4) MAP_PS_STREAM_ON_E_FACH_SWITCH: When the switch is on, the PS streaming services can be transmitted on the E-FACH(E-FACH for downlink and RACH for uplink, or E-FACH for downlink and E-RACH for uplink).
5) MAP_PS_STREAM_ON_HSDPA_SWITCH: When the switch is on, a PS streaming service is mapped on the HS-DSCH if the DL maximum rate of the service is greater than or equal to the HSDPA threshold for streaming services.
6) MAP_PS_STREAM_ON_HSUPA_SWITCH: When the switch is on, a PS streaming service is mapped on the E-DCH if the UL maximum rate of the service is greater than or equal to the HSUPA threshold for streaming services.
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Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
03 ming Traffic Class on HSUPA
Downlink Enhanced CELL_FACH
HSUPA 2ms TTI
7) MAP_SRB_6800_WHEN_RAB_ON_HSDSCH_SWITCH: When the switch is on, the signaling is transmitted at a rate of 6.8 kbit/s if all the downlink traffic is on the HSDPA channel.
8) MAP_SRB_ON_DCH_OR_FACH_CS_RRC_SWITCH: When this switch is turned on, the SRB of a CS RRC connection cannot be established on HSPA channels. The RNC determines whether an RRC connection request is for a CS service based on the RRC connection setup cause and the value of Domain Indicator. For a UE of a version earlier than Release 6, the RRC connection setup cause of CS services is Originating Conversational Call or Terminating Conversational Call. For a UE of Release 6 or a later version, the value of Domain Indicator must be CS and the RRC connection setup cause must be Originating Conversational Call or Terminating Conversational Call for a CS service.
9) MAP_CSPS_TTI_2MS_LIMIT_SWITCH: Whether CS and PS combined services can use HSUPA 2ms transmission time interval (TTI). When this switch is turned on, CS and PS combined services cannot use HSUPA 2ms TTI, which reduces CS call drops caused by TTI switching. When this switch is turned off, CS and PS combined services can use HSUPA 2ms TTI.
GUI Value Range:MAP_HSUPA_TTI_2MS_SWITCH, MAP_INTER_RAT_PS_IN_CHANLE_LIMIT_SWITCH, MAP_PS_BE_ON_E_FACH_SWITCH, MAP_PS_STREAM_ON_E_FACH_SWITCH, MAP_PS_STREAM_ON_HSDPA_SWITCH, MAP_PS_STREAM_ON_HSUPA_SWITCH, MAP_SRB_6800_WHEN_RAB_ON_HSDSCH_SWITCH, MAP_SRB_ON_DCH_OR_FACH_CS_RRC_SWITCH, MAP_CSPS_TTI_2MS_LIMIT_SWITCH
Actual Value Range:MAP_HSUPA_TTI_2MS_SWITCH, MAP_INTER_RAT_PS_IN_CHANLE_LIMIT_SWITCH, MAP_PS_BE_ON_E_FACH_SWITCH, MAP_PS_STREAM_ON_E_FACH_SWITCH, MAP_PS_STREAM_ON_HSDPA_SWITCH, MAP_PS_STREAM_ON_HSUPA_SWITCH, MAP_SRB_6800_WHEN_RAB_ON_HSDSCH_SWITCH, MAP_SRB_ON_DCH_OR_FACH_CS_RRC_SWITCH, MAP_CSPS_TTI_2MS_LIMIT_SWITCH
Unit:None
Default Value:MAP_HSUPA_TTI_2MS_SWITCH-0&MAP_INTER_RAT_PS_IN_CHANLE_LIMIT_SWITCH-0&MAP_PS_BE_ON_E_FACH_SWITCH-0&MAP_PS_STREAM_ON_E_FACH_SWITCH-0&MAP_PS_STREAM_ON_HSDPA_SWITCH-0&MAP_PS_STREAM_ON_HSUPA_SWITCH-0&MAP_SRB_6800_WHEN_RAB_ON_HSDSCH_SWITCH-0&MAP_SRB_ON_DCH_OR_FACH_CS_RRC_SWI
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Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
TCH-0&MAP_CSPS_TTI_2MS_LIMIT_SWITCH-0
ResourceOption
BSC6900
SET UEDCHTTIRECFG
None
None
Meaning:Resource type that triggers TTI adjustment based on user fairness and differentiated services.
This parameter is an advanced parameter. To modify this parameter, contact Huawei Customer Service Center for technical support.
GUI Value Range:RTWP, IUB, CE
Actual Value Range:RTWP, Iub, CE
Unit:None
Default Value:RTWP-1&IUB-0&CE-0
REVDPARA4
NodeB
SET NODEBRSVP
None
None
Meaning:Indicates the NodeB reserved parameter 4.
GUI Value Range:0~4294967295
Actual Value Range:0~4294967295
Unit:None
Default Value:0
RsvSwitch1
BSC6900
SET UALGORSVPARA
None
None
Meaning:1. RRM algorithm reserved U32 Switch Para 1. The para of 32 bits is reserved for further change request use.
2. RESERVED_SWITCH_1_BIT3: Whether to allow the RNC to limit the maximum data rate for HSDPA PS services after a CS service setup triggers an F2D state transition. When the switch is set to ON, the maximum data rate for HSDPA PS services is unlimited after a CS service setup triggers an F2D state transition. When the switch is set to OFF, the maximum data rate for HSDPA PS services is limited after a CS service setup triggers an F2D state transition.
3. RESERVED_SWITCH_1_BIT4: Whether to allow the RNC to optimize the algorithm of TTI dynamic switching for differentiated BE services based on fairness. When the switch is set to ON, the RNC does not update the throughput measurement control parameter for this algorithm if the parameter does not change after a handover is complete. In this case, the RNC triggers this algorithm upon receiving a TTI measurement report. When the switch is set to OFF, the RNC updates the throughput measurement control parameter for this algorithm after the handover is complete and prohibits this algorithm from triggering dynamic TTI shifts from 2 ms to 10 ms in the following 5s.
Disuse statement: This parameter is used temporarily in patch versions and will be replaced with a new parameter in later versions. The new parameter ID reflects the parameter function. Therefore, this parameter is not recommended for the configuration interface.
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Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
GUI Value Range:RESERVED_SWITCH_1_BIT1, RESERVED_SWITCH_1_BIT2, RESERVED_SWITCH_1_BIT3, RESERVED_SWITCH_1_BIT4, RESERVED_SWITCH_1_BIT5, RESERVED_SWITCH_1_BIT6, RESERVED_SWITCH_1_BIT7, RESERVED_SWITCH_1_BIT8, RESERVED_SWITCH_1_BIT9, RESERVED_SWITCH_1_BIT10, RESERVED_SWITCH_1_BIT11, RESERVED_SWITCH_1_BIT12, RESERVED_SWITCH_1_BIT13, RESERVED_SWITCH_1_BIT14, RESERVED_SWITCH_1_BIT15, RESERVED_SWITCH_1_BIT16, RESERVED_SWITCH_1_BIT17, RESERVED_SWITCH_1_BIT18, RESERVED_SWITCH_1_BIT19, RESERVED_SWITCH_1_BIT20, RESERVED_SWITCH_1_BIT21, RESERVED_SWITCH_1_BIT22, RESERVED_SWITCH_1_BIT23, RESERVED_SWITCH_1_BIT24, RESERVED_SWITCH_1_BIT25, RESERVED_SWITCH_1_BIT26, RESERVED_SWITCH_1_BIT27, RESERVED_SWITCH_1_BIT28, RESERVED_SWITCH_1_BIT29, RESERVED_SWITCH_1_BIT30, RESERVED_SWITCH_1_BIT31, RESERVED_SWITCH_1_BIT32
Actual Value Range:RESERVED_SWITCH_1_BIT1, RESERVED_SWITCH_1_BIT2, RESERVED_SWITCH_1_BIT3, RESERVED_SWITCH_1_BIT4, RESERVED_SWITCH_1_BIT5, RESERVED_SWITCH_1_BIT6, RESERVED_SWITCH_1_BIT7, RESERVED_SWITCH_1_BIT8, RESERVED_SWITCH_1_BIT9, RESERVED_SWITCH_1_BIT10, RESERVED_SWITCH_1_BIT11, RESERVED_SWITCH_1_BIT12, RESERVED_SWITCH_1_BIT13, RESERVED_SWITCH_1_BIT14, RESERVED_SWITCH_1_BIT15, RESERVED_SWITCH_1_BIT16,
RESERVED_SWITCH_1_BIT17, RESERVED_SWITCH_1_BIT18, RESERVED_SWITCH_1_BIT19, RESERVED_SWITCH_1_BIT20, RESERVED_SWITCH_1_BIT21, RESERVED_SWITCH_1_BIT22, RESERVED_SWITCH_1_BIT23, RESERVED_SWITCH_1_BIT24, RESERVED_SWITCH_1_BIT25, RESERVED_SWITCH_1_BIT26, RESERVED_SWITCH_1_BIT27, RESERVED_SWITCH_1_BIT28, RESERVED_SWITCH_1_BIT29, RESERVED_SWITCH_1_BIT30,
RESERVED_SWITCH_1_BIT31, RESERVED_SWITCH_1_BIT32
Unit:None
Default Value:RESERVED_SWITCH_1_BIT1-0&RESERVED_SWITCH_1_BIT2-0&RESERVED_SWITCH_1_BIT3-0&RESERVED_SWITCH_1_BIT4-0&RESERVED_SWITCH_1_BIT5-0&RESERVED_SWITCH_1_BIT6-0&RESERVED_SWITCH_1_BIT7-0&RESERVED_SWITCH_1_BIT8-0&RESERVED_SWITCH_1_BIT9-0&RESERVED_SWITCH_1_BIT10-0&RESERVED_SWITCH_1_BIT11-0&RESERVED_SWITCH_1_BIT12-0&RESERVED_SWITCH_1_BIT13-0&RESERVED_SWITCH_1_BIT14-0&RESERVED_SWITCH_1_BIT15-0&RESERVED_SWITCH_1_BIT16-0&RESERVED_SWITCH_1_BIT17-0&RESERVED_SWITCH_1_BI
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Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
T18-0&RESERVED_SWITCH_1_BIT19-0&RESERVED_SWITCH_1_BIT20-0&RESERVED_SWITCH_1_BIT21-0&RESERVED_SWITCH_1_BIT22-0&RESERVED_SWITCH_1_BIT23-0&RESERVED_SWITCH_1_BIT24-0&RESERVED_SWITCH_1_BIT25-0&RESERVED_SWITCH_1_BIT26-0&RESERVED_SWITCH_1_BIT27-0&RESERVED_SWITCH_1_BIT28-0&RESERVED_SWITCH_1_BIT29-0&RESERVED_SWITCH_1_BIT30-0&RESERVED_SWITCH_1_BIT31-0&RESERVED_SWITCH_1_BIT32-0
TenMsecForUlBasicMeas
BSC6900
SET ULDM
WRFD-020102
Load Measurement
Meaning:UL basic common measurement report cycle. For detailed information of this parameter, refer to 3GPP TS 25.433.
GUI Value Range:1~6000
Actual Value Range:10~60000
Unit:10ms
Default Value:100
UlHoCeResvSf
BSC6900
ADD UCELLCAC
MOD UCELLCAC
WRFD-020101
Admission Control
Meaning:Uplink Credit Reserved by Spread Factor for HandOver. SFOFF means that none of them are reserved for handover.
GUI Value Range:SF4(SF4), SF8(SF8), SF16(SF16), SF32(SF32), SF64(SF64), SF128(SF128), SF256(SF256), SFOFF(SFOFF)
Actual Value Range:SF4, SF8, SF16, SF32, SF64, SF128, SF256, SFOFF
Unit:None
Default Value:SF16(SF16)
UlLdrCreditSfResThd
BSC6900
ADD UNODEBLDR
MOD UNODEBLDR
WRFD-020106
Load Reshuffling
Meaning:Threshold of SF reserved in uplink credit LDR. The uplink credit LDR is triggered when the SF factor corresponding to the uplink reserved credit is higher than the uplink or downlink credit SF reserved threshold. The lower the parameter value is, the easier the credit enters the congestion status, the easier the LDR action is triggered, and the easier the user experience is affected. A lower code resource LDR trigger threshold, however, causes a higher admission success rate because the resource is reserved. The parameter should be set based on the operator's requirement.
GUI Value Range:SF4(SF4), SF8(SF8), SF16(SF16), SF32(SF32), SF64(SF64), SF128(SF128), SF256(SF256), 2*SF4(2*SF4), 2*SF2(2*SF2)
Actual Value Range:SF4, SF8, SF16, SF32, SF64, SF128, SF256, 2*SF4, 2*SF2
Unit:None
Default Value:SF8(SF8)
WCDMA RAN
CE Overbooking 10 Parameters
Issue 05 (2013-11-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
10-10
Parameter ID
NE
MML Command
Feature ID
Feature Name
Description
UlTtiCreditSfResThd
BSC6900
ADD UNODEBLDR
MOD UNODEBLDR
WRFD-020106
Load Reshuffling
Meaning:The threshold of the reserved SF is used for judging the uplink credit state for TTI switchover decision. When uplink credit is lower than the threshold, the credit state of TTI switchover algorithm is set to restricted. The smaller the parameter value is, the easier the credit state is set to restricted. The threshold of the reserved SF is converted to credit by DCH consumption law.
GUI Value Range:8SF4(8SF4), 7SF4(7SF4), 6SF4(6SF4), 5SF4(5SF4), 4SF4(4SF4), 3SF4(3SF4), 2SF4(2SF4), SF4(SF4), SF8(SF8), SF16(SF16), SF32(SF32), SF64(SF64), SF128(SF128), SF256(SF256)
Actual Value Range:8SF4, 7SF4, 6SF4, 5SF4, 4SF4, 3SF4, 2SF4, SF4, SF8, SF16, SF32, SF64, SF128, SF256
Unit:None
Default Value:SF8(SF8)
UpRatioFor2msTo10msBaseCE
BSC6900
SET UEDCHTTIRECFG
None
None
Meaning:Ratio for upper MAC-e/i rate threshold of CE-based TTI switchover from 2 ms to 10 ms. Upper MAC-e/i rate threshold of TTI switchover from 2 ms to 10 ms = "BeHsupa2msTtiRateThs" * this parameter value. "Upper MAC-e/i rate threshold of CE-based TTI switchover from 2 ms to 10 ms" is applied to the scenarios where the TTI switchover from 2 ms to 10 ms is triggered by used CEs or admission CEs:
1. When the actual CE resources are limited and the throughput of an HSUPA user with 2 ms TTI is within the range {Lower MAC-e/i rate threshold of TTI switchover from 2 ms to 10 ms, Upper MAC-e/i rate threshold of CE-based TTI switchover from 2 ms to 10 ms}, the HSUPA user switches from 2 ms TTI to 10 ms TTI to reduce the consumption of CE resources.
2. When the admission CE resources are limited and the throughput of an HSUPA user with 2 ms TTI is lower than the "Upper MAC-e/i rate threshold of used CE-based TTI switchover from 2 ms to 10 ms", the HSUPA user switches from 2 ms TTI to 10 ms TTI to reduce the consumption of admission CE resources.
GUI Value Range:0~100
Actual Value Range:0~1
Unit:%
Default Value:56
WCDMA RAN
CE Overbooking 11 Counters
Issue 05 (2013-11-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
11-1
11 Counters
Table 11-1 Counter description
Counter ID Counter Name Counter Description
NE Feature ID Feature Name
73424007 VS.NodeB.ULCreditUsed.Max Maximum NodeB Uplink Credit Usage When CE Overbooking Is Enabled for NodeB
BSC6900 WRFD-140212 CE Overbooking
73424008 VS.NodeB.ULCreditUsed.Min Minimum NodeB Uplink Credit Usage When CE Overbooking Is Enabled for NodeB
BSC6900 WRFD-140212 CE Overbooking
73441218 VS.NodeB.ULCreditUsed.Mean Average NodeB Uplink Credit Usage When CE Overbooking Is Enabled for NodeB
BSC6900 WRFD-140212 CE Overbooking
WCDMA RAN
CE Overbooking 12 Glossary
Issue 05 (2013-11-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
12-1
12 Glossary
For the acronyms, abbreviations, terms, and definitions, see the Glossary.
WCDMA RAN
CE Overbooking 13 Reference Documents
Issue 05 (2013-11-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
13-1
13 Reference Documents
1. HSPA Evolution Feature Parameter Description 2. HSUPA Feature Parameter Description 3. CE Resource Management Feature Parameter Description 4. Call Admission Control Feature Parameter Description 5. Load Control Feature Parameter Description 6. HSUPA TTI Selection Feature Parameter Description 7. License Management Feature Parameter Description