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WCDMA RAN

Enhanced Fast Dormancy Feature

Parameter Description

Issue 02

Date 2014-06-30

HUAWEI TECHNOLOGIES CO., LTD.


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Copyright © Huawei Technologies Co., Ltd. 2014. All rights reserved.

No part of this document may be reproduced or transmitted in any form or by any means without prior written

consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.

All other trademarks and trade names mentioned in this document are the property of their respective holders.

Notice

The purchased products, services and features are stipulated by the contract made between Huawei and the

customer. All or part of the products, services and features described in this document may not be within the

purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,

and recommendations in this document are provided "AS IS" without warranties, guarantees or representations

of any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in the

preparation of this document to ensure accuracy of the contents, but all statements, information, and

recommendations in this document do not constitute a warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base

Bantian, Longgang

Shenzhen 518129

People's Republic of China

Website: http://www.huawei.com

Email: [email protected]

Issue 02 (2014-06-30) Huawei Proprietary and Confidential

Copyright © Huawei Technologies Co., Ltd.

i

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Contents

1 About This Document..................................................................................................................1

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

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

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

1.4 Differences Between Base Station Types.......................................................................................................................4

2 Overview.........................................................................................................................................5

2.1 Introduction....................................................................................................................................................................5

2.2 Benefits...........................................................................................................................................................................6

3 Technical Description...................................................................................................................7

4 State Transitions for Fast Dormancy UEs...............................................................................10

5 Related Features...........................................................................................................................16

6 Network Impact...........................................................................................................................17

7 Engineering Guidelines.............................................................................................................19

7.1 When to Use Enhanced Fast Dormancy.......................................................................................................................19

7.2 Required Information...................................................................................................................................................19

7.3 Planning........................................................................................................................................................................19

7.3.1 RF Planning...............................................................................................................................................................19

7.3.2 Network Planning......................................................................................................................................................19

7.3.3 Hardware Planning....................................................................................................................................................19

7.4 Deployment..................................................................................................................................................................20

7.4.1 Requirements.............................................................................................................................................................20

7.4.2 Data Pre paration........................................................................................................................................................23

7.4.3 Precautions.................................................................................................................................................................40

7.4.4 Hardwar e Adjustment................................................................................................................................................40

7.4.5 Activation..................................................................................................................................................................40

7.4.6 Activation Observation..............................................................................................................................................52

7.4.7 Deactivation...............................................................................................................................................................53

7.4.8 Reconfiguration.........................................................................................................................................................58

7.5 Performance Monitoring...............................................................................................................................................59

7.6 Parameter Optimization................................................................................................................................................59

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7.7 Troubleshooting............................................................................................................................................................59

8 Parameters.....................................................................................................................................60

9 Counters......................................................................................................................................379

10 Glossary.....................................................................................................................................382

11 Reference Documents.............................................................................................................383

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1 About This Document

1.1 Scope

This document describes WRFD-020500 Enhanced Fast Dormancy, including its technical

principles, related features, network impact, and engineering guidelines.

1.2 Intended Audience

This document is intended for personnel who:

l Need to understand the features described herein

l 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:

l Feature change

Changes in features of a specific product version

l Editorial change

Changes in wording or addition of information that was not described in the earlier version

RAN16.0 02 (2014-06-30)

This issue includes the following changes.

ChangeType

Change Description Parameter Change

Feature

change

None None

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ChangeType


Editorial

change

Added the following sections:

l 5 Related Features

l 7.2 Required Information

l 7.3 Planning

l 7.4.3 Precautions

l 7.4.4 Hardware

Adjustment

l 7.4.8 Reconfiguration

l 7.6 Parameter

Optimization

Optimized the followingsections:

l 7.4.1 Requirements

l 7.4.5 Activation

None

RAN16.0 01 (2014-04-30)

This issue does not include any change.

RAN16.0 Draft A (2014-01-20)

Compared with Issue 04 (2013-12-30) of RAN15.0, Draft A (2014-01-20) of RAN16.0 includes

the following changes.

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ChangeType


Feature

change

None l Changed the

RESERVED_SWITCH_3_BIT1under the RsvSwitch3 parameter in the

SET UALGORSVPARA command

to the

RB_SETUP_F2D_USE_AM_RLC_

SWITCH under the OptimizationS-

witch4(BSC6900,BSC6910)

parameter in the SET

URRCTRLSWITCH command.

l Changed the

RESERVED_SWITCH_3_BIT3

under the RsvSwitch3 parameter in the


to the

RB_RECFG_F2D_USE_AM_RLC

_SWITCH under theOptimizationS-

witch4(BSC6900,BSC6910)

parameter in the SET

URRCTRLSWITCH command.

l Changed the




to the

PERFENH_CRNTI_OPT_SWITC

H under the PerfEnhanceSwitch

(BSC6900,BSC6910) parameter in the

SET URRCTRLSWITCH

command.

l Changed the




to the

RB_CU_FAIL_RRC_REL_CELL_

OPT_SWITCH under

theOptimizationSwitch5

(BSC6900,BSC6910) parameter in the

SET URRCTRLSWITCH

command.

This feature can be batch

activated using the CME. For

details, see section Using the

CME.

None

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ChangeType


Editorial

change

None None

1.4 Differences Between Base Station Types

This document applies to the following types of base stations.

Base Station Model

Macro l 3900 series base stations

lDBS3800

l BTS3812E

l BTS3812AE

Micro l BTS3803E

l BTS3902E

LampSite DBS3900

The features described in this document are implemented in the same way on macro, micro, and

LampSite base stations.

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2 Overview

2.1 Introduction

Some intelligent UEs on a live network send a Signaling Connection Release Indication (SCRI)

message to the RNC after PS data transmission is complete. By sending the SCRI message,

intelligent UEs request for a transition to idle mode or the CELL_PCH/URA_PCH state to reduce

battery consumption. Upon receiving the SCRI, the RNC can release the signaling connection

and switch the UEs to idle mode, or the RNC can maintain the signaling connection and switch

the UEs to the CELL_FACH or CELL_PCH/URA_PCH state.

By default, the RNC switches the UEs to idle mode. A UE setting up PS services in idle mode

consumes more signaling resources than that in the CELL_FACH or CELL_PCH/URA_PCHstate. If a large number of UEs are switched between idle mode and the CELL_DCH state,

signaling storms may occur. The EFD feature is introduced to switch the UEs to the

CELL_FACH or CELL_PCH/URA_PCH state to relieve signaling storms.

The UEs on a live network are classified into the following types:

l UEs that do not send an SCRI message (earlier than 3GPP Release 5)

This type of UE is of a release earlier than 3GPP Release 5 and does not send an SCRI

message after completing data transmission.

l UEs that do not send an SCRI message (3GPP Release 5 and later)

This type of UE is of 3GPP Release 5 or later and does not send an SCRI message after completing data transmission.

l UEs that send an SCRI message (with the "UE Requested PS Data session end" cause value)

This type of UE reads the T323 information element (IE) carried in the system information

block type 1 (SIB1) message and sends an SCRI message to the RNC after completing data

transmission. The SCRI message carries the "Signaling Connection Release Indication

Cause" IE, which is set to "UE Requested PS Data session end." This type of UE complies

with 3GPP Release 8.

T323 determines the interval at which a UE sends an SCRI message. That is, the T323 timer

starts after a UE sends an SCRI message, and SCRI messages with the "UE Requested PS

Data session end" cause value cannot be sent until T323 expires.

l UEs that send an SCRI message (with other cause values or no cause value)

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This type of UE does not read the "T323" IE carried in the SIB1 message, and sends an

SCRI message to the RNC after completing data transmission.

– The message carries the "Signaling Connection Release Indication Cause" IE and the

IE is set to cause values other than "UE Requested PS Data session end."

–The message does not carry the "Signaling Connection Release Indication Cause" IE.

Intelligent UEs that can use EFD are called fast dormancy UEs, and other UEs are called non-

fast dormancy UEs. Among the preceding four types of UEs, UEs that do not send an SCRI

message (earlier than 3GPP Release 5) are called non-fast dormancy UEs and the other three

types are called fast dormancy UEs.

If EFD is not enabled, the RNC releases the signaling connection of a UE and switches the UE

to idle mode after receiving an SCRI message from the UE.

If EFD is enabled, the RNC switches a UE to idle mode or to the CELL_FACH, CELL_PCH,

or URA_PCH state after receiving an SCRI message from the UE.

For details about the SCRI message, see section 8.1.14 "Signalling connection release indication

procedure" in 3GPP TS 25.331 V10.7.0.

2.2 Benefits

This feature can reduce RNC signaling load, NodeB signaling load, and NodeB CE resource

consumption caused by intelligent UEs.

For example, after the feature is enabled, if the number of PS RAB setups decreases by 70%,

the RNC SPU load decreases by 5% to 20% and both the NodeB signaling load and CE resource

consumption decrease by 10% to 30%.

NOTE

For the BSC6900, a signaling processing unit is the SPUa, SPUb, or SPUc board.

For the BSC6910, a signaling processing unit is the EGPUa board.

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3 Technical DescriptionWhen there is no PS data to be transmitted, the intelligent UE sends the RNC an SCRI message

to request the UTRAN to release the signaling connection. This procedure saves power. In

addition, the UE periodically sends heartbeat messages to the core network, for example, to

check for new mails on the mail server. If the EFD feature is disabled, the RNC releases the

signaling connection and switches the UE to idle mode. In this case, sending heartbeat messages

leads to the procedures for RRC connection setups, authentication, encryption, and RAB setups.

These procedures increase the RNC signaling processing load.

EFD is introduced to decrease the RNC signaling processing load. With EFD, the RNC switches

a UE to the CELL_FACH or CELL_PCH/URA_PCH state instead of idle mode upon receiving

an SCRI message from the UE. In this case, when the UE periodically sends heartbeat messages,

the signaling procedure between the UE and RNC is simplified because the RRC connection is

maintained. As the number of signaling exchange messages decreases, significant CPUresources can be saved for the RNC, and the UE consumes less battery power than a UE in idle

mode.

To enable the EFD feature, select the FAST_DORMANCY_SWITCH check box under the

PROCESSSWITCH(BSC6900,BSC6910) parameter in the SET URRCTRLSWITCH

command.

Figure 3-1 shows the signaling processing procedures for fast dormancy UEs before and after

EFD is enabled.

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Figure 3-1 Signaling processing procedures for fast dormancy UEs before and after EFD is

enabled

After EFD is enabled, the RNC identifies which UEs can use this feature through either of thefollowing mechanisms:

l Using the Type Allocation Code (TAC)

This mechanism, which is not standardized, is used for the early proprietary

implementations of fast dormancy.

The international mobile equipment identity (IMEI), which consists of 14 decimal digits

and one check digit, contains TAC and SNR. TAC indicates a particular type of device that

has been approved by a national GSM/WCDMA approval body. SNR is the serial number

identifying the UE. The structure of the IMEI, which is shown as follows, is specified in

section 6.2.1 "Composition of IMEI" of 3GPP TS 23.003 V8.15.0.

TAC (8 digits) SNR (6 digits) Spare (1 digit)

When the FD_TAC_MATCH_SWITCH under the PROCESSSWITCH

(BSC6900,BSC6910) parameter is enabled, the RNC determines whether fast dormancy

UEs can use EFD based on their TACs. Specifically, upon receiving an IDENTITY

REQUEST message from a fast dormancy UE, the RNC checks whether the TAC in the

IMEI IE of the message is in the EFD list.

– If so, the UE can use EFD. Upon receiving the SCRI message from the fast dormancy

UE, the RNC switches the UE to the CELL_FACH, CELL_PCH, or URA_PCH state.

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– If not, the UE cannot use EFD.

To enable the UE to use EFD, run the ADD UIMEITAC command to set the TAC

(BSC6900,BSC6910) parameter to the UE's TAC, set the FastDormancy

(BSC6900,BSC6910) parameter to ON, and set the TAC_FUNC(BSC6900,BSC6910)

parameter to Fast_Dormancy.

NOTE

Some fast dormancy UEs may have compatibility issues if the RNC switches them to the CELL_FACH,

CELL_PCH, or URA_PCH state after these UEs send an SCRI message. As a result, new services cannot

be initiated. This feature was tested only on iPhones and no compatibility issue occurred.

l Checking whether the UEs comply with 3GPP Release 5 or later

To enable UEs complying with 3GPP Release 5 or later to use EFD, the RNC must switch

these UEs to the CELL_FACH, CELL_PCH, or URA_PCH state or to idle mode upon

receiving the SCRI message from them. The related operations are as follows:

1. Disable the FD_TAC_MATCH_SWITCH under the PROCESSSWITCH

(BSC6900,BSC6910) parameter. This adds the TACs of UEs that comply with 3GPPRelease 5 or later to the EFD list so that these UEs can use EFD.

2. Enable the RNC_FD_SCRI_FORCE_REL_SWITCH under the

PROCESSSWITCH2(BSC6900,BSC6910) parameter. This enables the RNC to

switch fast dormancy UEs to idle mode upon receiving an SCRI message with no

cause value from them.

3. Run the RMV UIMEITAC command to remove TACs whose TAC_FUNC

(BSC6900,BSC6910) is set to Fast_Dormancy from the EFD list.

NOTE

You can run the LST UIMEITAC command to view TACs whose TAC_FUNC

(BSC6900,BSC6910) is set to Fast_Dormancy.

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4 State Transitions for Fast Dormancy UEsWhen EFD is disabled, upon receiving an SCRI message from a UE, the RNC releases the UE's

PS signaling connection.

When EFD is enabled, state transition procedures vary according to the UE type as follows:

l For fast dormancy UEs on the EFD list:

– The RNC switches fast dormancy UEs to idle mode to prevent compatibility issues

when the RNC receives an SCRI message where the Signaling Connection Release

Indication Cause IE is set to "UE Requested PS Data session end" and then another

SCRI message that does not include the Signaling Connection Release Indication Cause

IE.

– The RNC switches UEs from the CELL_DCH or CELL_FACH state to idle mode upon

receiving an SCRI message where the Signaling Connection Release Indication CauseIE is excluded if the RNC_FD_SCRI_FORCE_REL_SWITCH under the

PROCESSSWITCH2(BSC6900,BSC6910) parameter in the SET

URRCTRLSWITCH command is turned on. When the RNC receives an SCRI

message where the Signaling Connection Release Indication Cause IE is set to " UE

Requested PS Data session end", the RNC switches these UEs to the CELL_FACH,

CELL_PCH, or URA_PCH state.

If this switch is turned off, the RNC switches these UEs to the CELL_FACH or

CELL_PCH/URA_PCH state upon receiving the SCRI message. Note that the

RNC_EFD_D2F_SWITCH (underOptimizationSwitch(BSC6900,BSC6910) in SET

URRCTRLSWITCH) and FD_TAC_FORCE_D2F_SWITCH (under

PROCESSSWITCH(BSC6900,BSC6910) in ADD UIMEITAC) jointly controlwhether these UEs are switched to the CELL_FACH or CELL_PCH/URA_PCH state

from the CELL_DCH state.

– After PS data transmission is complete, the RNC switches a UE to CELL_FACH or

CELL_PCH/URA_PCH if the UE is in CELL_DCH and the PS inactivity timer

PsInactTmrForFstDrmDch(BSC6900,BSC6910) for EFD in CELL_DCH expires.

– After PS data transmission is complete, the RNC switches a UE to CELL_PCH/

URA_PCH if the UE is in CELL_FACH and the PS inactivity timer

PsInactTmrForFstDrmFach(BSC6900,BSC6910) for EFD in CELL_FACH expires.

The RNC_DF_2_URA_PCH_SWITCH under the PROCESSSWITCH

(BSC6900,BSC6910) parameter in the SET URRCTRLSWITCH command controls

whether the UE is switched to the CELL_PCH or URA_PCH state.

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– The RNC does not process an SCRI message where the Signaling Connection Release

Indication Cause IE is set to "UE Requested PS Data session end" when the RNC is

processing other procedures and the SCRIWITHCAUSE_OVERLAP_SWITCH under

the OptimizationSwitch3(BSC6900,BSC6910) parameter in the SET

URRCTRLSWITCH command is turned on. Instead, the RNC preferentially processes the ongoing procedures. After completing the ongoing procedures, the RNC

triggers the state transition procedure if the UE sends the RNC another SCRI message

or the PS inactivity timer expires.

– If a UE is switched to CELL_PCH/URA_PCH and the PS inactivity timer

PsInactTmrForPreFstDrm(BSC6900,BSC6910) for EFD in CELL_PCH/URA_PCH

expires, the RNC switches the UE to idle mode. The value of this timer should be less

than or equal to that of T305(BSC6900,BSC6910), preventing the UE from being

always in the CELL_PCH/URA_PCH state and unable to enter idle mode.

– If a UE is in CELL_PCH/URA_PCH and has data to send but the conditions for P2D/

U2D are not satisfied, the RNC instructs the UE to enter the CELL_FACH state.

–TAC-based P2D/U2D transitions. That is, when the FD_P2D_SWITCH under the PROCESSSWITCH(BSC6900,BSC6910) parameter in the ADD UIMEITAC

command is turned on, a P2D/U2D transition starts if the UE's TAC is identical with

the TAC added to the EFD list by running the ADD UIMEITAC command and the UE

experiences uplink data transmission or has a paging response in the PS domain.

– For details about P2D/U2D transitions due to FACH congestion, see section "FACH

Congestion Control" in Flow Control Feature Parameter Description.

– If a UE is in CELL_FACH and send messages whose traffic volume is higher than

FastDormancyF2DHTvmThd(BSC6900,BSC6910), the RNC switches the UE from

CELL_FACH to CELL_DCH.

–

The main factor for triggering the D2I transitions is FACH congestion. For details aboutstate transitions due to FACH congestion, see section "FACH Congestion Control" in

Flow Control Feature Parameter Description.

– For details about P2U/U2U/D2D/CPC/E-FACH and D2F/F2P based on 4B event state

transitions, see State Transition Feature Parameter Description.

l For UEs not on the EFD list:

– If the RNC received the SCRI, the RNC switches the UE to idle mode.

– The state transition for UEs not on the EFD list is the same as that for ordinary UEs.

For details, see State Transition Feature Parameter Description.

– For details about state transitions due to FACH congestion, see section "FACH

Congestion Control" in Flow Control Feature Parameter Description.NOTE

In the preceding descriptions, assume that single PS services are referred to. Upon receiving an SCRI

message from a UE processing CS+PS BE combined services, the RNC first releases the UE's PS signaling

connection. When the CS service is released, the RNC releases the UE's RRC connection.

UEs with a specified TAC cannot enter the CELL_PCH or URA_PCH state if you set the parameters in

the ADD UIMEITAC command as follows:

l Specify the TAC(BSC6900,BSC6910) parameter.

l Set the TAC_FUNC(BSC6900,BSC6910) parameter to Special_User_Enhance.

l Select the PCH_DISABLED_SWITCH check box under the SpecUserFunctionSwitch

(BSC6910,BSC6900) parameter.

Figure 4-1 shows the state transitions for EFD.

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Figure 4-1 State transitions for fast dormancy UEs

Table 4-1 lists the state transitions for different types of UEs after EFD is enabled.

Table 4-1 State transitions for different types of UEs after EFD is enabled

UE Type Fast DormancyUE or Not

State Transition

UEs that do not send an

SCRI message (earlier

than 3GPP Release 5)

No l State transition to CELL_FACH/

CELL_PCH/URA_PCH triggered by

event 4B

UEs that do not send an

SCRI message (3GPP

Release 5 and later)

Yes l State transition to CELL_FACH/


expiry of the PS inactivity timer for EFD

l State transition to CELL_FACH/


event 4B

UEs that send an SCRI

message (with the "UE

Requested PS Data

session end" causevalue)

Yes l State transition to CELL_FACH/


SCRI






event 4B

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UE Type Fast DormancyUE or Not

State Transition

UEs that send an SCRI

message (with other cause values or no cause

value)

Yes l State transition to idle mode triggered by

SCRIl State transition to CELL_FACH/





event 4B

The specific state transition in Figure 4-1 depends on the data configurations on the RNC side

listed in Table 4-2.

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Table 4-2 Data configurations for state transitions of fast dormancy UEs

Type Description

D2P

D2U

D2F

F2P

F2U

D2P/D2U indicates a transition from CELL_DCH to CELL_PCH/

URA_PCH, F2P/F2U from CELL_FACH to CELL_PCH/URA_PCH, andD2F from CELL_DCH to CELL_FACH.

The RNC starts the PS inactivity timer for fast dormancy when inactivity on

PS data is detected.

l PsInactTmrForFstDrmDch(BSC6900,BSC6910) specifies the PS

inactivity timer for CELL_DCH.

l PsInactTmrForFstDrmDch(BSC6900,BSC6910) specifies the PS

inactivity timer for CELL_FACH.

l PsInactTmrForPreFstDrm(BSC6900,BSC6910) specifies the PS

inactivity timer for CELL_PCH/URA_PCH.

If the UE is a fast dormancy UE and is not processing CS services, whenthe PS inactivity timer for fast dormancy expires or the RNC receives an

SCRI message from the UE, the UE changes states as follows:

For a UE in the CELL_DCH state:

l If the RNC_EFD_D2F_SWITCH under the OptimizationSwitch

(BSC6900,BSC6910) parameter in the SET URRCTRLSWITCH

command is turned on or the FD_TAC_FORCE_D2F_SWITCH under

the PROCESSSWITCH(BSC6900,BSC6910) parameter in the ADD

UIMEITAC command is turned on, the RNC triggers a D2F transition.

l If the RNC_EFD_D2F_SWITCH under the PROCESSSWITCH


command is turned off and the FD_TAC_FORCE_D2F_SWITCH

under the PROCESSSWITCH(BSC6900,BSC6910) parameter in the

ADD UIMEITAC command is turned off, the RNC triggers a D2P/D2U

transition.

For a UE in the CELL_FACH state, the RNC trigger an F2P/F2U state

transition.

l The RNC_DF_2_URA_PCH_SWITCH under the PROCESSSWITCH


command controls whether the UE is switched to the CELL_PCH or

URA_PCH state.

If this switch is turned on, the RNC initiates D2U or F2U state transitions.

If this switch is turned off, the RNC initiates D2P or F2P state transitions.

D2I//F2I D2I/F2I indicates a transition from CELL_DCH/CELL_FACH to idle.

The RNC initiates D2I or F2I state transitions upon receiving an SCRI

message where the Signaling Connection Release Indication Cause IE is

excluded if the RNC_FD_SCRI_FORCE_REL_SWITCH under the

PROCESSSWITCH2(BSC6900,BSC6910) parameter in the SET

URRCTRLSWITCH command is turned on.

D2I is also used for FACH congestion. For details about state transitions due

to FACH congestion, see section "FACH Congestion Control" in Flow

Control Feature Parameter Description.

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Type Description

P2I/U2I P2I/U2I indicates a transition from CELL_PCH/URA_PCH to idle.

If the UE is in the CELL_PCH/URA_PCH state, when the PS inactivity timer

for fast dormancy (specified by PsInactTmrForPreFstDrm(BSC6900,BSC6910) expires, the RNC releases the UE's RRC connection

and then the UE enters idle mode.

P2D

U2D

P2D/U2D indicates a transition from CELL_PCH/URA_PCH to

CELL_DCH.

l TAC-based P2D/U2D transitions. That is, when the

FD_P2D_SWITCH under the PROCESSSWITCH

(BSC6900,BSC6910) parameter in the ADD UIMEITAC command is

turned on, a P2D/U2D transition starts if the UE's TAC is identical with

the TAC added to the EFD list by running the ADD UIMEITAC

command and the UE experiences uplink data transmission or has a paging

response in the PS domain.

l For details about P2D/U2D transitions due to FACH congestion, see

section "FACH Congestion Control" in Flow Control Feature Parameter

Description.

P2F

U2F

P2F/U2F indicates a transition from CELL_PCH/URA_PCH to

CELL_FACH.

When the UE has data to send and the condition for P2D/U2D is not satisfied,

the RNC instructs the UE to enter the CELL_FACH state.

F2D F2D indicates a transition from CELL_FACH to CELL_DCH.

When a fast dormancy UE is in the CELL_FACH state and sends messages

whose traffic volume is higher than the FastDormancyF2DHTvmThd

(BSC6900,BSC6910), the RNC switches the UE from CELL_FACH to

CELL_DCH. The FastDormancyF2DHTvmThd(BSC6900,BSC6910) is a

new threshold of event 4a for fast dormancy UEs. This threshold is generally

set to a value greater than the traffic volume of most heartbeat messages to

prevent state transitions from being triggered by small-sized heartbeat

messages.

P2U For details, see State Transition Feature Parameter Description.

U2U

D2D

CPC

E-FACH

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5 Related FeaturesPrerequisite Features

None

Mutually Exclusive Features

None

Impacted Features

None

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6 Network ImpactSystem Capacity

This feature can reduce RNC signaling load, NodeB signaling load, and NodeB CE resource

consumption caused by intelligent UEs. The feature gains depend on network coverage,

proportion of intelligent UEs, and traffic model.

Network Performance

This feature has the following impacts on network performance:

l Reduced RRC connection setup success rate (The RRC connection setup failure rate does

not increase.)

–On live networks, the service-related RRC connection setup success rate is higher thanthe non-service-related RRC connection setup success rate. After this feature is enabled,

the number of service-related RRC connection setup attempts significantly decreases

and the number of non-service-related RRC connection setup attempts slightly

decreases. A possible result of this is that the total RRC connection setup success rate

decreases but the number of RRC connection failures does not increase.

– The signaling exchange success rate in poor coverage areas is generally lower than that

in good coverage areas. After this feature is enabled, the number of RRC connection

setup attempts slightly decreases in poor coverage areas and the number of RRC

connection setup attempts significantly decreases in good coverage areas. A possible

result of this is that the total RRC connection setup success rate decreases but the number

of RRC connection setup failures does not increase.l Reduced PS RAB setup success rate

The calculation formula for the PS RAB setup success rate was corrected, as described in

section 7.4.1 Requirements. According to the operation and maintenance experience of

live networks, the PS RAB setup success rate of some fast dormancy UEs is higher than

the average level of the entire network. After this feature is enabled, the number of PS RAB

setup attempts significantly decreases. As a result, the total PS RAB setup success rate may

decrease.

l Reduced paging success rate

After this feature is enabled, a large number of UEs are switched to the CELL_PCH or

URA_PCH state. As a result, the number of paging attempts in idle mode significantly

decreases, but the original paging failures cannot be eliminated. A possible consequence

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of this is that the paging success rate in idle mode decreases. The original paging failures

may be caused by the following:

– UEs that are dropped from the network or abnormally shut down

– Poor coverage

– Multiple RNCs sharing the same LAC or RAC

l Longer FACH congestion duration

After this feature is enabled, the number of UEs in the CELL_FACH state increases, the

traffic volume on the FACH increases. As a result, the FACH congestion duration may

increase.

l Increased PS call drop rate

The calculation formula for the PS call drop rate was corrected, as described in section

7.4.1 Requirements. Before this feature is enabled, the UE may be switched to idle mode

because it has no PS data transmission before TRB reset. After this feature is enabled, the

online duration of UEs performing PS services increases so that there may be more TRB

resets before the PS User Inactive Detecting Timer expires. As a result, PS call drops occur.

Therefore, if there are a large number of call drops caused by TRB resets on the live network

before this feature is enabled, the PS call drop rate may increase after this feature is enabled.

l Increased HSDPA call drop rate

The calculation formula for the HSDPA call drop rate was corrected, as described in section

7.4.1 Requirements. After this feature is enabled, the HSDPA call drop rate may still

increase.

Before this feature is enabled, the HSDPA service is normally released if the UE has no

data to transmit. Then, if the UE has data to transmit (even only a small amount of data),

the UE is switched to the CELL_DCH state. After this feature is enabled, a large number

of UEs are switched to the CELL_PCH or URA_PCH state. Afterward, the UEs only need

to be switched to the CELL_FACH state if there is a small amount of data to transmit. As

a result, the denominator in the calculation formula for the HSDPA call drop rate decreases.

After EFD is enabled, the actual HSDPA service duration basically remains unchanged.

As a result, the total number of abnormal HSDPA service releases has few changes. In

summary, the HSDPA call drop rate increases after EFD is enabled.

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7 Engineering Guidelines

7.1 When to Use Enhanced Fast Dormancy

The EFD feature is recommended for scenarios where the proportion of intelligent UEs is high,

leading to a high CPU load on control-plane board in the RNC and on baseband processing

boards in the NodeB. This feature reduces the Uu, Iu, and Iub signaling, uplink and downlink

channel element (CE) consumption, and CPU load.

7.2 Required Information

None

7.3 Planning

7.3.1 RF Planning

None

7.3.2 Network Planning

It is good practice to maintain load balancing among all frequencies in the network when usingthis feature. If the network is a service-layered network as follows, set Wait RB reconfiguration

response timer and RL restoration timer in the SET USTATETIMER command to 11000

and 15000, respectively. This reduces the number of call drops for fast dormancy UEs in the

CELL_FACH or CELL_PCH state.

l F1 carries R99 services.

l F2 carries HSPA services.

l F2 does not allow UEs in the idle, CELL_FACH, or CELL_PCH state to camp on.

7.3.3 Hardware Planning

None

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7.4 Deployment

7.4.1 Requirements

l Dependencies on Other Features

This feature does not depend on other features. However, to maximize network resources

and KPIs, it is recommended that this feature be used with other functions, such as FACH

congestion optimization and combined services optimization. For suggestions about how

to configure parameters for these functions, see section 7.4.2 Data Preparation.

l Dependencies on Hardware

None

l License

The license controlling this feature has been activated on the RNC side. For details about

the license control items and how to activate the license, see License Management Feature

Parameter Description.

The following table lists detailed information about the license.

Feature ID Feature Name License ControlItem

NE SalesUnit

WRFD-020500 Fast Dormancy

Enhancement

Fast Dormancy

Enhancement (per PS

Active User)

BSC6900

BSC6910

per PS

Active

User

Fast Dormancy

Enhancement (per

Mbps)

BSC6900 Mbps

NOTE

The license must be activated by performing the following operation first:

Run the RNC MML command SET LICENSE to set the FAST_DORMANCY_ENHANCE switch under

the functionswitch5(BSC6900,BSC6910) parameter to on and set Fast Dormancy Enhancement-per PS

Active User to an appropriate value.

l Calculation Formula Correction for the Call Drop Rate

Before EFD is enabled, if the UE has no data to transmit for a specified period of time, it

will be switched from connected mode to idle mode. After EFD is enabled, if the UE has

no data to transmit for a specified period of time, it will be switched from the CELL_FACH

or CELL_DCH state to the CELL_PCH or URA_PCH state instead of being switched to

idle mode. From the perspective of user experience, the UE has no data to transmit in idle

mode, CELL_PCH, and URA_PCH. All scenarios in which the UE should be switched

from CELL_DCH to idle mode, CELL_PCH, or URA_PCH are considered PS service

release scenarios. For details, see Figure 7-1, Figure 7-2, and Figure 7-3.

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Figure 7-1 UEs with no data transmission being switched to idle mode through normal

release before EFD is enabled

Figure 7-2 UEs with no data transmission being switched to CELL_PCH/URA_PCH after

EFD is enabled

Figure 7-3 PS service release scenarios

From the perspective of user experience, switching to CELL_PCH/URA_PCH after EFD

is enabled is equivalent to switching to idle mode through normal release before EFD is

enabled. Therefore, the calculation formula for the PS call drop rate is changed to the

following:

– The PS call drop rate measures the ratio of the number of abnormal PS service releases

to the total number of normal and abnormal PS service releases. Its calculation formula

is changed to the following:

PS Call Drop Ratio with PCH (Cell) = [(VS.RAB.AbnormRel.PS –

VS.RAB.AbnormRel.PS.PCH – VS.RAB.AbnormRel.PS.D2P –

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VS.RAB.AbnormRel.PS.F2P)/(VS.RAB.AbnormRel.PS + VS.RAB.NormRel.PS –

VS.RAB.AbnormRel.PS.PCH – VS.RAB.NormRel.PS.PCH + VS.DCCC.D2P.Succ +

VS.DCCC.Succ.F2P + VS.DCCC.Succ.D2U + VS.DCCC.Succ.F2U)] x 100%

– The PS R99 call drop rate measures the ratio of the number of abnormal PS R99 service

releases to the total number of normal and abnormal PS R99 service releases. Itscalculation formula is changed to the following:

PS R99 Call Drop Ratio with PCH (Cell) =

[(VS.RAB.AbnormRel.PSR99 – VS.RAB.AbnormRel.PS.PCH –

VS.RAB.AbnormRel.PS.R99D2P –

VS.RAB.AbnormRel.PS.F2P)/(VS.RAB.AbnormRel.PSR99 +

VS.RAB.NormRel.PSR99 – VS.RAB.AbnormRel.PS.PCH –

VS.RAB.NormRel.PS.PCH + VS.HSDPA.F2H.Succ + VS.HSDPA.D2H.Succ +

VS.PSR99.D2P.Succ + VS.DCCC.Succ.F2P + VS.DCCC.Succ.F2U)] x 100%

– The HSDPA call drop rate measures the ratio of the number of abnormal HSDPA service

releases to the total number of normal and abnormal HSDPA service releases. Itscalculation formula is changed to the following:

HSDPA Service Drop Ratio with PCH (Cell) = [(VS.HSDPA.RAB.AbnormRel –

VS.HSDPA.RAB.AbnormRel.H2P)/(VS.HSDPA.RAB.AbnormRel +

VS.HSDPA.RAB.NormRel + VS.HSDPA.HHO.H2D.SuccOutIntraFreq +

VS.HSDPA.HHO.H2D.SuccOutInterFreq + VS.HSDPA.H2D.Succ +

VS.HSDPA.H2F.Succ + VS.HSDPA.H2P.Succ)] x 100%

– The HSUPA call drop rate measures the ratio of the number of abnormal HSUPA service

releases to the total number of normal and abnormal HSUPA service releases. Its

calculation formula is changed to the following:

HSUPA Call Drop Ratio with PCH (Cell) = [(VS.HSUPA.RAB.AbnormRel –

VS.HSUPA.RAB.AbnormRel.E2P)/(VS.HSUPA.RAB.AbnormRel +VS.HSUPA.RAB.NormRel + VS.HSUPA.HHO.E2D.SuccOutIntraFreq +

VS.HSUPA.HHO.E2D.SuccOutInterFreq + VS.HSUPA.E2F.Succ +

VS.HSUPA.E2D.Succ + VS.HSUPA.E2P.Succ)] x 100%

l Calculation Formula Correction for the PS RAB Setup Success Rate

After EFD is enabled, a large number of UEs will be switched to the CELL_PCH or

URA_PCH state. Then, a large number of UEs will be switched from CELL_PCH or

URA_PCH to CELL_FACH or CELL_DCH to establish PS services, instead of releasing

PS RAB setup and then reinitiating PS RAB setup. From the perspective of user experience,

RAB setup, P2F, and P2D are all processes in which UEs initiate services. Therefore, the

calculation formula for the PS RAB setup success rate should be corrected. The PS RAB

setup success rate measures the ratio of the number of successful PS service initiations tothe number of attempted PS service initiations. Its calculation formula is changed to the

following:

PS RAB Setup Success Ratio with PCH (Cell) = [(VS.RAB.SuccEstabPS.Cell +

VS.DCCC.P2F.Succ + VS.DCCC.URAP2F.Succ + VS.DCCC.P2D.Succ +

VS.DCCC.URAP2D.Succ)/(VS.RAB.AttEstabPS.Cell + VS.DCCC.P2F.Att +

VS.DCCC.URAP2F.Att + VS.DCCC.P2D.Att + VS.DCCC.URAP2D.Att)] x 100%

l Adding a Second S-CCPCH

After EFD is enabled, both the number of UEs in the CELL_FACH state and the traffic

volume on the FACH increase. As a result, it is possible that the user plane on the FACH

is congested and the RRC connection setup fails. Therefore, you need to add an S-CCPCH

dedicated to theFACH to alleviate FACH congestion.

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– If there is only one S-CCPCH on the network, it is recommended that you add a second

S-CCPCH before enabling EFD.

– Add the second S-CCPCH at least three days before enabling EFD, because the addition

takes a long time.

–Add the second S-CCPCH during off-peak hours (for example, in the early morning)

because cells need to be deactivated, which interrupts services.

– After the second S-CCPCH is added, system information on the UE side may not be

updated because the Value Tag saved on the UE is consistent with that carried in the

currently broadcast system information. As a result, the UE does not know that the S-

CCPCH has changed, thereby affecting the RRC connection setup success rate.

According to section 8.1.1 "Broadcast of system information" in 3GPP TS 25.331, the

longest period during which system information is saved on the UE is six hours. When

the longest period is exceeded, the UE reads system information again. Therefore, it

takes six hours for the RRC connection setup success rate to restore to normal. To avoid

this problem, you need to enable the

CELL_SIB_NOT_UPD_NCELL_CHG_SWITCH . If this switch is enabled, system

information is not updated in the current cell when neighboring cells are being activated

or deactivated.

For details about adding a Second S-CCPCH, see section (Mandatory) Adding a Second

S-CCPCH.

l Modify the Iu-PS activity factor.

1. Run the RNC MML command ADD TRMFACTOR to select an unused FTI and set

the activity factor to 10 for all services.

2. Run the RNC MML command MOD ADJMAP to index all Iu-PS FTIs to the

preceding FTI.

3. Run the RNC MML command MOD ADJMAP to set the activity factor to 10 for

each signaling connection on the Iu-PS interface.

MML Command Examples:

ADD TRMFACTOR: FTI=xx, REMARK="IUPS for EFD", PSCONVDL=10, PSCONVUL=10,

PSSTRMDL=10, PSSTRMUL=10, PSINTERDL=10, PSINTERUL=10, PSBKGDL=10, PSBKGUL=10,

HDVOICEDL=10, HDCONVDL=10, HDSTRMDL=10, HDINTERDL=10, HDBKGDL=10,

HUVOICEUL=10, HUCONVUL=10, HUSTRMUL=10, HUINTERUL=10, HUBKGUL=10;

MOD ADJMAP: ANI=xxxx, ITFT=IUPS, FTI=xx;

MOD ADJMAP: ANI=yyyy, ITFT=IUPS, FTI= xx;

7.4.2 Data Preparation

ParameterName

Parameter ID Setting Notes Data Source

Process switch PROCESSSWITCH

(BSC6900,BSC6910)

:FAST _ DORMANC

Y _ SWITCH

If you need to enable EFD,

set this switch to 1.

Radio network

plan (internal

plan)

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ParameterName


Dynamic

ResourceAllocation

Switch

DraSwitch

(BSC6900,BSC6910):DRA _ PS _ BE _ STA

TE _ TRANS _

SWITCH

It is recommended that you

enable the state transitionswitch for PS BE services as

well as the EFD switch.

Radio network

plan (internal plan)

Dynamic

Resource

Allocation

Switch

DraSwitch

(BSC6900,BSC6910)

:

DRA_HSDPA_STA

TE_TRANS_SWIT

CH


enable this switch for newly

deployed networks and

retain the original settings

for existing networks.

Radio network

plan (internal

plan)

DynamicResource

Allocation

Switch

DraSwitch(BSC6910,BSC6900)

:

DRA_HSUPA_STA

TE_TRANS_SWIT

CH

It is recommended that youenable this switch for newly




Radio network plan (internal

plan)

Dynamic

Resource

Allocation

Switch

DraSwitch

(BSC6900,BSC6910)

:

DRA_PS_NON_BE

_STATE_TRANS_S

WITCH


enable this switch for newly




Radio network

plan (internal

plan)

Timer 323 T323

(BSC6900,BSC6910)

When a UE is not processing

any CS or PS service and the

T323 timer expires, the UE

is allowed to send a

SIGNALLING

CONNECTION RELEASE

INDICATION message

with the IE "Signalling

Connection Release

Indication Cause" set to "UE

Requested PS Data sessionend." It is recommended that

you set this parameter to

D0.

Radio network

plan (internal

plan)


(BSC6900,BSC6910)

:

FD_TAC_MATCH

_SWITCH

To apply fast dormancy to

3GPP Release 5 or later UEs,

it is recommended that you

disable this switch by setting

it to 0.

Radio network

plan (internal

plan)

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ParameterName


Process Control

Switch 2

PROCESSSWITCH

2(BSC6900,BSC6910)

:

RNC_FD_SCRI_F

ORCE_REL_SWIT

CH

When the RNC receives the

signaling connection releaseindication message from a

UE, the UE is switched to

idle mode if no cause value

is carried in the message. To

make this happen, it is

recommended that you

enable this switch by setting

it to 1.

Radio network


Optimization

Switch

OptimizationSwitch

(BSC6900,BSC6910)

: RNC_EFD_D2F_S

WITCH

When this switch is enabled,

the RNC performs the D2F

procedure on UEs thatsupport fast dormancy.

Enable this switch by setting

it to 1.

Radio network

plan (internal

plan)

FAST

DORMANCY

USER T1 in

CELL_DCH

PsInactTmr-

ForFstDrmDch

(BSC6900,BSC6910)


set this parameter to 2s.

Radio network

plan (internal

plan)

FAST

DORMANCY

USER T1 inCELL_FACH

PsInactTmr-

ForFstDrmFach

(BSC6900,BSC6910)



Radio network

plan (internal

plan)

FAST

DORMANCY

USER T1 in

CELL_PCH

PsInactTmrFor-

PreFstDrm

(BSC6900,BSC6910)



Radio network

plan (internal

plan)

Fast Dormancy

User FACH/

E_FACH2DCH/

HSPA 4A

Threshold

FastDormancyF2D

HTvmThd

(BSC6900,BSC6910)


set this parameter to 512

bytes.

Radio network

plan (internal

plan)


(BSC6900,BSC6910)

:

RNC_DF_2_URA_P

CH_SWITCH



it to 0. To allow fast

dormancy UEs to be

switched to the URA_PCH

state when EFD is enabled,

split the URA and enable this

switch by setting it to 1.

Radio network

plan (internal

plan)

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ParameterName


Paging

PreemptionSwitch

PagingSwitch

(BSC6900,BSC6910)


set this switch to ON toenable CS paging preempt

the resources of PS paging.

Radio network


UMTS R99 PS

streaming service

uplink factor

PSSTRMUL

(BSC6900,BSC6910)

Change the parameter

setting. (Otherwise, the

transmission bandwidth is

congested on the Iu-PS

interface and thereby the PS

RAB setup success rate

sharply deteriorates.)

Select an unused FTI. It is

recommended that you setthis parameter to 10 for PS

services.

Index all Iu-PS FTIs to the

preceding FTI. If there are

several physical connections

on the Iu-PS interface, set

this parameter to 10 for each

of them.

Radio network

plan (internal

plan)

UMTS R99 PS

streaming servicedownlink factor

PSSTRMDL

(BSC6900,BSC6910)


setting. (Otherwise, thetransmission bandwidth is






recommended that you set

this parameter to 10 for PS

services.


preceding FTI. If there areseveral physical connections



of them.

Radio network


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ParameterName


UMTS R99 PS

interactiveservice uplink

factor

PSINTERUL

(BSC6900,BSC6910)










services.





of them.

Radio network


UMTS R99 PS

interactive

service downlink

factor

PSINTERDL

(BSC6900,BSC6910)











services.






of them.

Radio network

plan (internal

plan)

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ParameterName


UMTS R99 PS

conversationalservice uplink

factor

PSCONVUL

(BSC6900,BSC6910)










services.





of them.

Radio network


UMTS R99 PS

conversational

service downlink

factor

PSCONVDL

(BSC6900,BSC6910)











services.






of them.

Radio network

plan (internal

plan)

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ParameterName


UMTS R99 PS

backgroundservice uplink

factor

PSBKGUL

(BSC6900,BSC6910)










services.





of them.

Radio network


UMTS R99 PS

background

service downlink

factor

PSBKGDL

(BSC6900,BSC6910)











services.






of them.

Radio network

plan (internal

plan)

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ParameterName


UMTS HSUPA

voice serviceuplink factor

HUVOICEUL

(BSC6900,BSC6910)










services.





of them.

Radio network


UMTS HSUPA

streaming service

uplink factor

HUSTRMUL

(BSC6900,BSC6910)











services.






of them.

Radio network

plan (internal

plan)

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ParameterName


UMTS HSUPA

interactiveservice uplink

factor

HUINTERUL

(BSC6900,BSC6910)










services.





of them.

Radio network


UMTS HSUPA

conversational

service uplink

factor

HUCONVUL

(BSC6900,BSC6910)











services.






of them.

Radio network

plan (internal

plan)

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ParameterName


UMTS HSUPA

backgroundservice uplink

factor

HUBKGUL

(BSC6900,BSC6910)










services.





of them.

Radio network


UMTS HSDPA

voice service

downlink factor

HDVOICEDL

(BSC6900,BSC6910)











services.






of them.

Radio network

plan (internal

plan)

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ParameterName


UMTS HSDPA

streaming servicedownlink factor

HDSTRMDL

(BSC6900,BSC6910)










services.





of them.

Radio network


UMTS HSDPA

interactive

service downlink

factor

HDINTERDL

(BSC6900,BSC6910)











services.






of them.

Radio network

plan (internal

plan)

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ParameterName


UMTS HSDPA

conversationalservice downlink

factor

HDCONVDL

(BSC6900,BSC6910)










services.





of them.

Radio network


UMTS HSDPA

background

service downlink

factor

HDBKGDL

(BSC6900,BSC6910)











services.






of them.

Radio network

plan (internal

plan)

Process Control

Switch 2

PROCESSSWITCH

2

(BSC6900,BSC6910)

:

RNC_PS_QUERY_

UE_IMEI_SWITC

H

PS IMEI Request Switch.



it to 1.

Radio network

plan (internal

plan)

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ParameterName


CAC algorithm

switch

CacSwitch

(BSC6900,BSC6910):

FACH_60_USER_S

WITCH

Switch for Allowing a

Maximum of 60 UEs Carriedon the FACH.



it to 1.

Radio network


Performance

Enhancement

Switch 1

PerfEnhanceS-

witch1

(BSC6900,BSC6910)

:

PERFENH_FACH_

CONG_D2IDLE_S

WITCH

Switch for triggering D2I

when the number of

CELL_FACH UEs reaches

the upper threshold and the

DCH has no data

transmission.



it to 0.

Radio network

plan (internal

plan)

Optimization

Switch

OptimizationSwitch

(BSC6900,BSC6910)

:P2D_SWITCH

Switch for triggering P2D

when the number of

CELL_FACH UEs reaches

the upper threshold.



it to 1.

Radio network

plan (internal

plan)

Process Control

Switch 3

PROCESSSWITCH

3

(BSC6900,BSC6910)

:

RNC_TVM_BASE

D_P2D_SWITCH

TVM-based P2D Switch.



it to 1.

Radio network

plan (internal

plan)

Performance

Enhancement

Switch

PerfEnhanceSwitch

(BSC6900,BSC6910)

:

PERFENH_PSTRA

FFIC_P2H_SWITCH

Switch for P2H triggered by

PS services.



it to 1.

Radio network

plan (internal

plan)

Performance

Enhancement

Switch 1

PerfEnhanceS-

witch1

(BSC6900,BSC6910)

:

PERFENH_P2D_F

AIL_RETRY_SWIT

CH

Switch for allowing DRD

and channel fallback if P2D

fails.



it to 1.

Radio network

plan (internal

plan)

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ParameterName


Process Control

Switch 3

PROCESSSWITCH

3(BSC6900,BSC6910)

:

RNC_F2D_RLC_S

USPEND_SWITCH

Switch for RLC data

transmission suspensionduring downlink F2D.



it to 1.

Radio network


Performance

Enhancement

Switch

PerfEnhanceSwitch

(BSC6900,BSC6910)

:PERFENH _ TX _ IN

TERRUPT _ AFT _ T

RIG _ SWITCH

Switch for RLC data

transmission suspension

during uplink F2D.



it to 1.

Radio network

plan (internal

plan)

Tx Interruption

After Trigger

TxInterruptAfter-

Trig

(BSC6900,BSC6910)


set this parameter to D2000.

Radio network

plan (internal

plan)

Compatibility

Switch

CmpSwitch

(BSC6900,BSC6910)

:

CMP_F2P_PROCE

SS_OPTIMIZATIO

N_SWITCH

Switch for optimizing the

procedure for the

CELL_FACH-to-

CELL_PCH-or-URA_PCH

state transition.


enable this switch by settingit to 1.

Radio network

plan (internal

plan)

Performance

Enhancement

Switch 1

PerfEnhanceS-

witch1

(BSC6900,BSC6910)

:

PERFENH_F2P_LI

MIT_WITH_CS_IU

_CON_SWITCH

Switch for optimizing the

situation that F2P and CS

service setup overlap.



it to 1.

Radio network

plan (internal

plan)

FACH Meas

Occasion CycleLen Coefficient

FACHMeasOccaCy-

cleLenCoef (BSC6900,BSC6910)

If the FACH Measurement

Indicator parameter is set toNOT_REQUIRE on the

live network, do not change

the setting of the FACH

Meas Occasion Cycle Len

Coefficient parameter.

Otherwise, it is


FACH Meas Occasion

Cycle Len Coefficient to 6.

Radio network


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ParameterName


Optimization

Switch4

OptimizationSwitch4

(BSC6900,BSC6910):

RB_SETUP_F2D_U

SE_AM_RLC_SWIT

CH

Switch controlling whether

to use AM when the UE inthe CELL_FACH state

delivers the CS RB SETUP

message.



it to 1.

Radio network


Optimization

Switch4

OptimizationSwitch4

(BSC6900,BSC6910)

:

RB_RECFG_F2D_

USE_AM_RLC_SW

ITCH


to use AM when the UE in

the CELL_FACH state

delivers the RADIO

BEARER RECONFIGURATION

message.



it to 1.

Radio network

plan (internal

plan)

Process Control

Switch 4

PROCESSSWITCH

4

(BSC6900,BSC6910)

:

RRC_CELLFACH_ DL_TRB_RESET_

TO_F2D_SWITCH


to trigger F2H for

CELL_FACH UEs after

TRB reset.

It is recommended that youenable this switch by setting

it to 1.

Radio network

plan (internal

plan)

Improvement

Switch

ImprovementSwitch

(BSC6900,BSC6910)

:

SEND_UE_CAP_E

NQ_RELOC_CCH

_SWITCH

If this switch is enabled, the

RNC does not send the

CAPABILITY ENQUIRY

message to relocated-in

CELL_FACH/CELL_PCH/

URA_PCH UEs.


enable this switch by settingit to 1.

Radio network

plan (internal

plan)

Performance

Switch

PerfEnhanceSwitch

(BSC6900,BSC6910)

:

PERFENH_CRNTI

_OPT_SWITCH

C-RNTI allocation

mechanism optimization

switch.



it to 1.

Radio network

plan (internal

plan)

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ParameterName


RLC SDU

Retransmission

RLCSDURETRANS

MISSION (BSC6900,BSC6910)


the transmitted andunacknowledged SDUs in

the buffer are retransmitted.



it to ON.

Radio network


Compatibility

Switch2

CmpSwitch2

(BSC6900,BSC6910)

:

CMP_F2D_RLC_O

NESIDE_REBUILD

_SWITCH


the RLC entity can be re-

established in only the

uplink or downlink during

the F2D state transition. It is

recommended that youenable this switch by setting

it to 1.

Radio network

plan (internal

plan)

Optimization

Switch5

OptimizationSwitch5

(BSC6900,BSC6910)

:

RB_CU_FAIL_RRC

_REL_CELL_OPT_

SWITCH

During the D2F procedure,

the UE cannot receive the

RRC connection release

message if the following

conditions are met:

l The RNC receives the

cell update message with

the cause value "cell

reselection" from the UE

in the new cell.

l The RNC initiates the

abnormal release

procedure because the

UE's response expires.

To avoid this problem,


it to 1.

Radio network

plan (internal

plan)

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ParameterName


Optimization

Switch

OptimizationSwitch

(BSC6900,BSC6910):

AMR_F2D_OVERL

AP_CELLUPT_SWI

TCH

When this switch is enabled,

for UEs that are establishingCS services and shifting

from the CELL_FACH state

to the CELL_DCH state, the

RNC stops establishing CS

services to handle cell

update if the RNC receives

from the UEs a cell update

message containing the

cause value "cell

reselection." When this

switch is disabled, for UEs

that are establishing CS

services and shifting from

the CELL_FACH state to the

CELL_DCH state, if the

RNC receives from the UEs

a cell update message

containing the cause value

"cell reselection", the RNC

stops establishing CS

services to handle cell

update and resumes CS

services only after cellupdate is completed.



it to 1.

Radio network


Service Mapping

Strategy Switch

MapSwitch

(BSC6900,BSC6910)

:

MAP_CSPS_PS_UL

_USE_DCH_SWITC

H

Switch for controlling

whether to allow PS services

in combined services to be

carried over the DCH in the

uplink.

It is recommended that youenable this switch by setting

it to 1.

Radio network

plan (internal

plan)

Service Mapping

Strategy Switch

MapSwitch

(BSC6900,BSC6910)

:

MAP_CSPS_PS_DL

_USE_DCH_SWITC

H

Switch for controlling

whether to allow PS services

in combined services to be

carried over the DCH in the

downlink.



it to 1.

Radio network

plan (internal

plan)

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ParameterName


Upper limit of UL

BE data rate inAMR services

UlDchBeUpperLi-

mitforAmr (BSC6900,BSC6910)


set this parameter to D8.

Radio network


Upper limit of DL

BE data rate in

AMR services

DlDchBeUpperLi-

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