cell barring

Huawei Proprietary and Confidential

Copyright © Huawei Technologies Co., Ltd

WCDMA RAN

Cell Barring Feature Parameter Description

Copyright © Huawei Technologies Co., Ltd. 2011. 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.

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and other Huawei trademarks are the property of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders.

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The purchased products, services and features are stipulated by the commercial contract made between Huawei and the customer. All or partial products, services and features described in this document may not be within the purchased scope or the usage scope. Unless otherwise agreed by 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.

WCDMA RAN

Cell Barring 1 Introduction

Issue 01 (2011-04-30) Huawei Proprietary and Confidential


i

Contents

1 Introduction ................................................................................................................................ 1-1

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

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

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

2 Overview ..................................................................................................................................... 2-1

3 Automatic Operation ................................................................................................................ 3-1

4 Manual operation ...................................................................................................................... 4-1

5 Engineering Guideline ............................................................................................................. 5-1

6 Parameters ................................................................................................................................. 6-1

7 Counters ...................................................................................................................................... 6-5

8 Glossary ...................................................................................................................................... 8-1

WCDMA RAN

Cell Barring 1 Introduction



1-1

1 Introduction

1.1 Scope

This document describes the basic principles of the cell barring feature.

1.2 Intended Audience

This document is intended for:

Personnel who are familiar with WCDMA basics

Personnel who need to understand cell barring

Personnel who work with Huawei products

1.3 Change History

This section provides information on the changes in different document versions.

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

Feature change: refers to the change in the cell barring feature.

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

Document Issues

The document issues are as follows:

01 (2011-04-30)

Draft B (2011-03-30)

Draft A (2010-12-30)

01 (2011-04-30)

This is the document for the first commercial release of RAN13.0.

Compared with issue Draft B (2011-03-30) of RAN13.0, this issue has no change.

Draft B (2011-03-30)

This is the draft of the document for RAN13.0.

Compared with Draft A (2010-12-30) of RAN13.0, this issue optimizes the description.

Draft A (2010-12-30)

This is the draft of the document for RAN13.0.

Compared with issue 01 (2010-12-20) of RAN12.0, this issue optimizes the description.

WCDMA RAN

Cell Barring 2 Overview



2-1

2 Overview

This document describes the feature WRFD-021102 Cell Barring.

When a cell is abnormal, this feature enables the operator to automatically or manually bar the cell.

When the Iu interface is disconnected, this feature can prevent the UE from initiating useless access requests and ensure that 3G UEs are handed over to the 2G network.

This feature can provide flexibility for the operator in some scenarios (for example, maintenance).

The cell can be barred or unbarred manually and automatically.

Manual operation. The operator can bar/unbar the cell by the MML commands. And then RNC will update the system information of this cell to indicate UE the change;

Automatic operation. In cases of Iu-CS or Iu-PS breakdown, the RNC keeps providing coverage (but not service) to the UEs under its control. This means that several UEs are kept in 3G coverage, but, actually, they cannot access the network. If the Iu-CS breaks down, the RNC will bar the CS domain service for the cell; if the Iu-PS breaks down, the RNC will bar the PS domain service for the cell. In the case of both Iu-CS and Iu-PS breakdown, RNC bars the cell automatically.

The RAN notifies the UE through SIB about the information of cell barring. And the UE detects SIB and access the network according to the SIB.

If SIB1 does not contain the information of one CN domain (CS or PS), the UE does not initiate services in this domain and does not reselect cells but camps in the current cell.

If the SIB3/4 indicates the cell is barred, the UE is not permitted to select/re-select this cell, not even for emergency calls. UE firstly tries to camp on configured 3G/2G neighboring cells. If all cells can not be camped on, the UE tries to search new network.

WCDMA RAN

Cell Barring 3 Automatic Operation



3-1

3 Automatic Operation

The RNC take actions according to the faults on the Iu:

If only the Iu UP breaks up, the RNC takes no action.

If the Iu breaks up, and does not recover in the period StateIndTmr, the RNC takes the Iu as faulty.

If there are only intermittent disconnections, the RNC does not release the signaling connection. If the duration of the fault exceeds the StateIndTmr and is not recovered, the RNC judges that the connection to the CN breaks up and releases all the signaling connection to the CN.

If only the Iu-CS signaling link breaks up,

− If SYS_INFO_UPDATE_FOR_IU_RST is turned on and BARRED_CELL_FOR_CSDOMAIN_RST is turned off, the SIB1 does not contain the CS CN information. In this case, the UE will not initiate CS service and will not reselect other network.

− If SYS_INFO_UPDATE_FOR_IU_RST is turned on and BARRED_CELL_FOR_CSDOMAIN_RST is turned on, the SIB3/SIB4 indicates the cell is barred. In this case, the UE will reselect other cell.

If Iu-PS signaling link breaks up,

− If SYS_INFO_UPDATE_FOR_IU_RST is turned on, the SIB1 does not contain PS CN information. In this case, the UE will not initiate PS service and will not reselect other network.

If the signaling links of both Iu-CS and Iu-PS break up,

− If SYS_INFO_UPDATE_FOR_IU_RST is turned on, the SIB3/SIB4 indicates the cell is barred. In this case, the UE will reselect other cell.

After the Iu recovers, the cells are automatically unbarred.

When the Iu interface is faulty, the RNC gradually restricts cell access in Bar mode. When the Iu interface is restored, the RNC gradually enables cell access in Not Bar mode. The parameter IuAcIntervalOfCell defines the interval from barring/unbarring one cell to barring/unbarring another cell. In this way, the location update procedure can be distributed to a specified time period and the risk due to congestion is reduced.

../RNCParaHtml/mbsc/m-para/uiutimerandnum_stateindtmr.html


../RNCParaHtml/mbsc/m-para/uacalgo_iuacintervalofcell.html

WCDMA RAN

Cell Barring 4 Manual operation



4-1

4 Manual operation

Quick blocking/unblocking of cells is required in some special scenarios. For example, if the RNC is faulty when the UE camps on the 3G network, the RNC cannot provide complete services on the access network; if the CN needs to be upgraded, the UE must be forcibly handed over from the 3G network to the 2G network. Although the BLK UCELL command can be executed to block/unblock cells in batches, this method requires longer preparation and processing time. Therefore, it does not meet the requirement for quickly blocking/unblocking cells.

Quick blocking/unblocking of cells is a process of UE access control through the AC control IEs in the cell system information. It is effective for the UEs in idle mode. The blocking modes are as follows:

Blocking all the cells controlled by an RNC through the ADD URNCALLCELLBLK command.

Blocking all the cells belonging to an operator through the ADD UCNOPALLCELLBLK command.

Only one blocking mode can be used for quick blocking/unblocking of cells, that is, the two blocking modes cannot be

used simultaneously.

In the latter blocking mode, the ADD UCNOPALLCELLBLK command is executed for only one operator.

Cell blocking can be performed in the PS domain or in both the PS domain and the CS domain, which is set by the DomainType parameter. The processing time of cell blocking is set by the ProcessDuration parameter.

Table 4-1 provides four schemes for quickly blocking/unblocking cells.

Table 4-1 Four schemes for quickly blocking/unblocking cells

Target Object

Blocked Domain

Scheme UE Version Compatibility

RNC PS domain Delete the information about the PS domain from SIB1. Only the information about the CS domain is broadcast.

Any new PS service is rejected. This scheme is effective for all the UEs.

RNC CS domain and PS domain

Set all the ACs in the "Access Class Barred list" IE in SIB3 to barred.

In addition, set all the ACs in the "Domain Specific Access Restriction Parameters For All" IE in the "Domain Specific Access Restriction For Shared Network" IE to barred.

Any new service is rejected. This scheme is effective for all the UEs.

Operator PS domain Set all the PS ACs in the "Domain Specific Access Restriction Parameters For OperatorN" IE in the "Domain Specific Access Restriction For Shared Network" IE to barred. In addition, set the CS domain to noRestriction (NULL).

Any new PS service is rejected. This scheme is effective for the UEs of 3GPP Release 6 or later.

Operator CS domain and PS domain

Set all the CS ACs and PS ACs in the "Domain Specific Access Restriction Parameters For OperatorN" IE in the "Domain Specific Access Restriction For Shared Network" IE to barred.

Any new service is rejected. This scheme is effective for the UEs of 3GPP Release 6 or later.

../RNCParaHtml/mbsc/m-para/ucnopallcellblk_domaintype.html

../RNCParaHtml/mbsc/m-para/ucnopallcellblk_processduration.html

WCDMA RAN

Cell Barring 5 Engineering Guideline



5-1

5 Engineering Guideline

Deployment Guideline

The use of this feature does not affect the KPI of local network, because after the cell is barred the UE will not retry to access the local cell. But the UE will try to access inter-RAT cells or inter-operator cells in the same coverage and cause signaling shock to them. So you need to consider the anti-shock capability when deploying this feature and ensure the cell can work normally when a lot of UEs come to the cell.s

It is recommended to use the default parameters of the feature.

Automatic Cell Barring

To enable the function of the automatic cell barring, run the following command:

SET URRCTRLSWITCH: PROCESSSWITCH = SYS_INFO_UPDATE_FOR_IU_RST-1;

SET URRCTRLSWITCH: PROCESSSWITCH = BARRED_CELL_FOR_CSDOMAIN_RST-1;

You can set the protection for intermittent disconnection:

SET UIUTIMERANDNUM: CnOpIndex=X, CNId=Y, StateIndTmr=Z;

Quickly Blocking One Cell

When a cell is blocked in high priority, the cell is deactivated immediately. When a cell is blocked in medium priority, the cell is deactivated immediately if no subscriber accesses the cell in the duration specified for blocking of medium priority, or if any subscriber accesses the cell in the duration specified for blocking of medium priority the cell is deactivated after the duration specified for blocking of medium priority expires. When a cell is blocked in low priority, the cell is deactivated when no subscriber accesses the cell.

To block a cell run the following command:

BLK CELL: CellId=1; Priority=HIGH;

To unblock a cell, run the following command:

UBL UCELL: CELLID=1;

Quickly Blocking All the Cells

The function of quickly blocking all the cells only can chose one of the following methods: quickly bolcking all the cells in the RNC (ADD URNCALLCELLBLK) or quickly blocking all the cells of the designated operator in the RNC(ADD UCNOPALLCELLBLK). That means the MML command ADD URNCALLCELLBLK and ADD UCNOPALLCELLBLK can not executed in the same time.

To block all the cells in the RNC in the PS domain in 10 minutes, run the following command:

ADD URNCALLCELLBLK: DomainType = PsBlk, ProcessDuration = 10;

To unblock all the cells in the RNC:

RMV URNCALLCELLBLK

../RNCParaHtml/mbsc/m-para/urrctrlswitch_processswitch.html


../RNCParaHtml/mbsc/m-para/uiutimerandnum_cnopindex.html

../RNCParaHtml/mbsc/m-para/uiutimerandnum_cnid.html


../RNCParaHtml/mbsc/m-para/urncallcellblk_domaintype.html

../RNCParaHtml/mbsc/m-para/urncallcellblk_processduration.html

WCDMA RAN

Cell Barring 6 Parameters



6-1

6 Parameters

Table 6-1 Parameter description

Parameter ID

NE MML Command Description

CNId BSC6900 SET UIUTIMERANDNUM(Mandatory)

Meaning:Identifying a CN Node. When the Iu-Flex feature is enabled, a maximum of 32 CN nodes can be configured in each CN domain, either the CS domain or the PS domain. CN nodes are uniquely but not necessarily consecutively numbered within a BSC6900. For example, set the number of a CN node to 0 and that of another CN node to 2.

Note:

Although the number of a CN node ranges from 0 to 4095, a maximum of 64 CN nodes can be configured

GUI Value Range:0~4095

Actual Value Range:0~4095

Default Value:None

CnOpIndex BSC6900 SET UIUTIMERANDNUM(Mandatory)

Meaning:Represent an index for a CN operator

GUI Value Range:0~3


Default Value:None

DomainType

BSC6900 ADD UCNOPALLCELLBLK(Mandatory)

MOD UCNOPALLCELLBLK(Mandatory)

Meaning:This parameter specifies the blocked domain type

GUI Value Range:PsBlk(BLOCK PS), CsAndPsBlk(BLOCK CS AND PS)

Actual Value Range:PsBlk, CsAndPsBlk

Default Value:None

DomainType

BSC6900 ADD URNCALLCELLBLK(Mandatory)

MOD URNCALLCELLBLK(Optional)

Meaning:This parameter specifies the blocked domain type

GUI Value Range:PsBlk(BLOCK PS), CsAndPsBlk(BLOCK CS AND PS)

Actual Value Range:PsBlk, CsAndPsBlk

Default Value:None

IuAcIntervalOfCell

BSC6900 SET UACALGO(Optional) Meaning:When the Iu interface is faulty, the RNC gradually restricts cell access in Bar mode. When the Iu interface is restored, the RNC gradually enables cell access in Not Bar mode. This parameter defines the interval between the cells working in Bar mode or in Not Bar mode. In this way, the location update procedure can be distributed to a specified time period and the risk due to congestion is

../RNCParaHtml/mbsc/m-para/uiutimerandnum_cnid.html

../RNCParaHtml/mbsc/m-mml/set-uiutimerandnum.html


../RNCParaHtml/mbsc/m-para/uiutimerandnum_cnopindex.html





../RNCParaHtml/mbsc/m-mml/add-ucnopallcellblk.html


../RNCParaHtml/mbsc/m-mml/mod-ucnopallcellblk.html




../RNCParaHtml/mbsc/m-mml/add-urncallcellblk.html


../RNCParaHtml/mbsc/m-mml/mod-urncallcellblk.html




../RNCParaHtml/mbsc/m-mml/set-uacalgo.html

WCDMA RAN




6-2

reduced



Default Value:1

PROCESSSWITCH

BSC6900 SET URRCTRLSWITCH(Optional)

Meaning:1)INVOKE_TRACE_SWITCH. When it is checked, RNC will start Invoke Trace procedure upon receiving INVOKE TRACE Message form CN, otherwise, RNC won't start the Invoke Trace procedure though it receives the INVOKE TRACE message.

2)SYS_INFO_UPDATE_FOR_IU_RST. When it is checked, RNC will broadcast SYSTEM INFORMATION messages to UE when Iu reset, otherwise, RNC won't broadcast SYSTEM INFORMATION messages to UE when Iu reset.

3)DRNC_DIRECT_DSCR. When it is checked, DRNC will start DSCR procedure directly in RRC states other than CELL_DCH, otherwise, DRNC will transfer RRC CELL UPDATE message to SRNC.

5)RNC_SHARE_SWITCH. When it is checked, RNC traffic share function will be valid, otherwise, RNC traffic function cannot be used.

6)RNCAP_IMSI_HO_SWITCH. When it is checked, Imsi handover function will be used, otherwise it will be not used.

7)TERMINAL_VERSION_DEBASE_SWITCH. When it is checked, terminal version R4 will debase to R99.

8)SYS_HO_OUT_CIPHER_SWITCH. When it is checked, the RNC will add ciphering byte at GSM HANDOVER COMMAND if the GSM system do not add any cipher information at that message.

9)SYS_HO_CIPHER_CONFIG. When it is checked, the cipher configuration in the added cipher byte in GSM will be A5/1.When it is no checked ,the cipher configuration is A5/0.

10)ARRED_CELL_FOR_CSDOMAIN_RST. When it is checked, cell will be bared when CS domain is invalid, otherwise the CS domain will be bared when CS domain is invalid. It is invalid If SYS_INFO_UPDATE_FOR_IU_RST is not checked.

11)CR2284R1_SWITCH.in section 8.6.6.28 of TS25.331 of R5 Before2006, it describes that the HFN should add one when UE is ciphering in the situation of Timing re-initialized hard handover, while not specified in RB SETUP



../RNCParaHtml/mbsc/m-mml/set-urrctrlswitch.html

../RNCParaHtml/mbsc/m-mml/set-urrctrlswitch.html

WCDMA RAN




6-3

process in the section of 8.6.4.3. so it is not clear whether to add or not in RB SETUP in DRD scenarios. CR2284R1 clarify that HFN should add one in RB SETUP process with Timing re-initialized hard handover. when it is checked ,RNC accepts this CR2284R1; when it is not checked ,RNC does not accept this CR2284R1.

12)CDT_MSG_FULL_TRACE: When it is checked, CDT trace function which starts tracing from message RRC CONNECT REQUEST.

13)CR2284R1_COMPATIBLE_SWITCH.CR2284R1 causes the compatible problem. if UE is not consistent with RNC regarding whether accept the CR2284R1 or not, it will cause the problem of streaming when UEs are communicating with each other. So RNC creates this switch. when it is checked, RNC is auto-adaptive to accept the CR2284R1 according to UE version information. The principles that RNC judges UE whether to accept the CR2284R1 are as follows: R5 and above UE accepts the CR; R99/R4 UE, if it receives the START LIST value from RB SETUP COMPLETE,RNC figures that UE accepts the CR; R99/R4 UE, if it only receives the START value from RB SETUP COMPLETE,RNC figures that UE does not accept the CR; when it is not checked, whether RNC accept the CR or not is according to CR2284R1_SWITCH. The relations between these two switches CR2284R1_SWITCH and CR2284R1_COMPATIBLE_SWITCH are as follows:

(1)CR2284R1_COMPATIBLE_SWITCH is checked, RNC is self-compatible, so the CR2284R1_SWITCH is invalid;

(2)CR2284R1_COMPATIBLE_SWITCH is not checked, the CR2284R1_SWITCH is valid.

14)COMBINE_OPERATION_DRD_SWITCH. When it is on, RNC will not reject the message RB SETUP CMP without the IE active time.

15)UL_INTER_PROTECT_SWITCH. When the switch is off, RNC will not do integrity protection check for uplink RRC messages.

16)FAST_DORMANCY_SWITCH. When it is checked, RNC will apply FAST DORMANCY function.

17)SYS_HO_IN_CIPHER_SWITCH. When it is checked, don't receive the encrypted ability information from RELOC REQ ,default

WCDMA RAN




6-4

configured of encrypted parameter are UIA1 and UEA0.

18)PTT_EARLY_TRANS_SWITCH_OFF. When it is checked, PTT user will not apply the early transmission function, otherwise, PTT user will apply the early transmission function.

19)UPLINK_MDC_ENHENCEMENT_SWITCH. This switch has become invalid.

20)NODEB_PRIVATE_INTERFACE_SWITCH. When it is checked, the NodeB private interface data can be taken to the NodeB through the IUB protocol message.

21)PTT_SPEC_LI_SWITCH_OFF. When it is checked, special LI will not be used for PTT user, otherwise, special LI will be used for PTT user.

22)RNC_DF_2_URA_PCH_SWITCH. When it is checked, RNC will support transferring Fast Dormancy UE from CELL_DCH or CELL_FACH to URA_PCH. When it is not checked, RNC will not support transferring Fast Dormancy UE from CELL_DCH or CELL_FACH to URA_PCH.

23)FD_TAC_MATCH_SWITCH. When it is checked, RNC will apply FAST DORMANCY function for UE whose TAC is configured in database. When it is not checked, RNC will apply FAST DORMANCY function for UE whose version is R5 or later

GUI Value Range:INVOKE_TRACE_SWITCH, SYS_INFO_UPDATE_FOR_IU_RST, DRNC_DIRECT_DSCR, RNC_SHARE_SWITCH, RNCAP_IMSI_HO_SWITCH, TERMINAL_VERSION_DEBASE_SWITCH, SYS_HO_OUT_CIPHER_SWITCH, SYS_HO_CIPHER_CONFIG, BARRED_CELL_FOR_CSDOMAIN_RST, CR2284R1_SWITCH, CDT_MSG_FULL_TRACE, CR2284R1_COMPATIBLE_SWITCH, COMBINE_OPERATION_DRD_SWITCH, UL_INTER_PROTECT_SWITCH, FAST_DORMANCY_SWITCH, SYS_HO_IN_CIPHER_SWITCH, PTT_EARLY_TRANS_SWITCH_OFF, UPLINK_MDC_ENHENCEMENT_SWITCH, NODEB_PRIVATE_INTERFACE_SWITCH, PTT_SPEC_LI_SWITCH_OFF, RNC_DF_2_URA_PCH_SWITCH, FD_TAC_MATCH_SWITCH

Actual Value Range:This parameter is set to 0

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6-5

or 1 according to the related domains

Default Value:None

ProcessDuration

BSC6900 ADD UCNOPALLCELLBLK(Mandatory)

MOD UCNOPALLCELLBLK(Optional)

Meaning:This parameter specifies the processing duration of the cell blocking in the RNC



Default Value:None

ProcessDuration

BSC6900 ADD URNCALLCELLBLK(Mandatory)

MOD URNCALLCELLBLK(Optional)

Meaning:This parameter specifies the processing duration of the cell blocking in the RNC



Default Value:None

StateIndTmr

BSC6900 SET UIUTIMERANDNUM(Optional)

Meaning:CN protection timer



Default Value:20000

















WCDMA RAN

Cell Barring 7 Counters



7-1

7 Counters

Table 7-1 Counter description

Counter ID Counter Name Counter Description

Feature ID Feature Name

50342548 VS.ULCE.Max.Dedicated Maximum Dedicated Uplink CE

WRFD-021102 Cell Barring

50342549 VS.DLCE.Max.Dedicated Maximum Dedicated Downlink CE


50342550 VS.ULCE.Max.Shared Maximum Shared Uplink CE


50342554 VS.DLCE.Max.Shared Maximum Shared Downlink CE


../NodeBCounterHtml/nodeb/b-nodeb-perf/Mt-50342548.html




WCDMA RAN

Cell Barring 8 Glossary



8-1

8 Glossary

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

Glossary.htm

cell barring

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