Cell Barring(RAN13.0 01)

Cell Barring RAN13.0

Feature Parameter Description

Issue

01

Date

2011-04-30

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2012. 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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Website:

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Email:

[email protected]

WCDMA RAN Cell Barring

1 Introduction

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 ......................................................................................................................................7-1 8 Glossary ......................................................................................................................................8-1 9 Reference Documents .............................................................................................................9-1

Issue 01 (2011-04-30)

Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd

i


1 Introduction

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.

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2 Overview

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.

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3 Automatic Operation

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.

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4 Manual operation

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. 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.



Blocking PS services for a cell controlled by an RNC by turning on the RSVDBIT14 switch included by the RsvdPara1 parameter in the ADD UCELLALGOSWITCH command.



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



Only one blocking mode can be used for quick blocking/unblocking of cells, that is, the blocking modes based on RNC and Operator 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

RNC

PS domain Delete the information about the PS domain from Any new PS service is SIB1. Only the information about the CS domain is rejected. This scheme is broadcast. effective for all the UEs.

RNC

CS domain Set all the ACs in the "Access Class Barred list" IE Any new service is and PS in SIB3 to barred. rejected. This scheme is domain In addition, set all the ACs in the "Domain Specific effective for all the UEs. Access Restriction Parameters For All" IE in the "Domain Specific Access Restriction For Shared Network" IE to barred.

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).

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Scheme


UE Version Compatibility

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

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4 Manual operation

Target Object

Blocked Domain

Operator

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

CELL

PS domain Delete the information about the PS domain from Any new PS service is SIB1. Only the information about the CS domain is rejected. This scheme is broadcast. effective for all the UEs in the cell.

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Scheme


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

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5 Engineering Guideline

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

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6 Parameters

6 Parameters Table 6-1 Parameter description Parameter ID

NE

MML Command Description

CNId

BSC690 SET Meaning:Identifying a CN Node. When the Iu-Flex 0 UIUTIMERANDN feature is enabled, a maximum of 32 CN nodes can be UM(Mandatory) 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 Unit:None Default Value:None

CnOpIndex

Meaning:Represent an index for a CN operator. BSC690 SET 0 UIUTIMERANDN UM(Mandatory) GUI Value Range:0~3 Actual Value Range:0~3 Unit:None Default Value:None

DomainType

BSC690 ADD Meaning:This parameter specifies the blocked domain 0 URNCALLCELLB type. LK(Mandatory) GUI Value Range:PsBlk(BLOCK PS), MOD CsAndPsBlk(BLOCK CS AND PS) URNCALLCELLB Actual Value Range:PsBlk, CsAndPsBlk LK(Optional) Unit:None Default Value:None

DomainType

BSC690 ADD Meaning:This parameter specifies the blocked domain 0 UCNOPALLCELL type. BLK(Mandatory) GUI Value Range:PsBlk(BLOCK PS), MOD CsAndPsBlk(BLOCK CS AND PS) UCNOPALLCELL BLK(Mandatory) Actual Value Range:PsBlk, CsAndPsBlk Unit:None

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Parameter ID

6 Parameters

NE

MML Command Description Default Value:None

IuAcIntervalOfCell BSC690 SET Meaning:When the Iu interface is faulty, the RNC 0 UACALGO(Option gradually restricts cell access in Bar mode. When the Iu al) 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 reduced. GUI Value Range:1~3600 Actual Value Range:1~3600 Unit:s Default Value:1 ProcessDuration BSC690 ADD Meaning:This parameter specifies the processing 0 URNCALLCELLB duration of the cell blocking in the RNC. LK(Mandatory) GUI Value Range:2~30 MOD URNCALLCELLB Actual Value Range:2~30 LK(Optional) Unit:min Default Value:None ProcessDuration BSC690 ADD Meaning:This parameter specifies the processing 0 UCNOPALLCELL duration of the cell blocking in the RNC. BLK(Mandatory) GUI Value Range:2~30 MOD UCNOPALLCELL Actual Value Range:2~30 BLK(Optional) Unit:min Default Value:None Meaning:1)INVOKE_TRACE_SWITCH. PROCESSSWITC BSC690 SET H 0 URRCTRLSWITC When it is checked, RNC will start Invoke Trace H(Optional) 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.

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Parameter ID

6 Parameters

NE

MML Command Description 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. 4)RNC_SHARE_SWITCH. When it is checked, RNC traffic share function will be valid, otherwise, RNC traffic function cannot be used. 5)RNCAP_IMSI_HO_SWITCH. When it is checked, Imsi handover function will be used, otherwise it will be not used. 6)TERMINAL_VERSION_DEBASE_SWITCH. When it is checked, terminal version R4 will debase to R99. 7)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. 8)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. 9)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. 10)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 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. 11)CDT_MSG_FULL_TRACE. When it is checked, CDT trace function which starts tracing from message RRC CONNECT REQUEST.

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Parameter ID

6 Parameters

NE

MML Command Description 12)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. 13)COMBINE_OPERATION_DRD_SWITCH. When it is on, RNC will not reject the message RB SETUP CMP without the IE active time. 14)UL_INTER_PROTECT_SWITCH. When the switch is off, RNC will not do integrity protection check for uplink RRC messages. 15)FAST_DORMANCY_SWITCH. When it is checked, RNC will apply FAST DORMANCY function. 16)SYS_HO_IN_CIPHER_SWITCH. When it is checked, don't receive the encrypted ability information from RELOC REQ ,default configured of encrypted parameter are UIA1 and UEA0. 17)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. 18)UPLINK_MDC_ENHENCEMENT_SWITCH. This switch has become invalid.

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Parameter ID

6 Parameters

NE

MML Command Description 19)NODEB_PRIVATE_INTERFACE_SWITCH. When it is checked, the NodeB private interface data can be taken to the NodeB through the IUB protocol message. 20)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. 21)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. 22)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 or 1 according to the related domains. Unit:None Default Value:None

RsvdPara1

BSC690 ADD Meaning:The algorithms with the above values represent UCELLALGOSWI

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Parameter ID

6 Parameters

NE

MML Command Description

0

TCH(Optional)

are

MOD as follow: RSVDBIT1~RSVDBIT16:Reserved UCELLALGOSWI Switch. TCH(Optional) GUI Value Range:RSVDBIT1(Reserved Switch 1), RSVDBIT2(Reserved Switch 2), RSVDBIT3(Reserved Switch 3), RSVDBIT4(Reserved Switch 4), RSVDBIT5(Reserved Switch 5), RSVDBIT6(Reserved Switch 6), RSVDBIT7(Reserved Switch 7), RSVDBIT8(Reserved Switch 8), RSVDBIT9(Reserved Switch 9), RSVDBIT10(Reserved Switch 10), RSVDBIT11(Reserved Switch 11), RSVDBIT12(Reserved Switch 12), RSVDBIT13(Reserved Switch 13), RSVDBIT14(Reserved Switch 14), RSVDBIT15(Reserved Switch 15), RSVDBIT16(Reserved Switch 16) Actual Value Range:RSVDBIT1, RSVDBIT2, RSVDBIT3, RSVDBIT4, RSVDBIT5, RSVDBIT6, RSVDBIT7, RSVDBIT8, RSVDBIT9, RSVDBIT10, RSVDBIT11, RSVDBIT12, RSVDBIT13, RSVDBIT14, RSVDBIT15, RSVDBIT16 Unit:None Default Value:None StateIndTmr

Meaning:CN protection timer. BSC690 SET 0 UIUTIMERANDN GUI Value Range:1000~300000 UM(Optional) Actual Value Range:1000~300000 Unit:ms Default Value:20000

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7 Counters

7 Counters Table 7-1 Counter description Counter ID

Counter Name

50342548

Counter Description

Feature ID

Feature Name

VS.ULCE.Max.Dedicated Maximum Dedicated Uplink CE

WRFD-021102

Cell Barring

50342549

VS.DLCE.Max.Dedicated Maximum Dedicated Downlink CE

WRFD-021102

Cell Barring

50342550

VS.ULCE.Max.Shared

Maximum Shared WRFD-021102 Uplink CE

Cell Barring

50342554

VS.DLCE.Max.Shared

Maximum Shared WRFD-021102 Downlink CE

Cell Barring

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8 Glossary

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

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9 Reference Documents

9 Reference Documents None

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Cell Barring(RAN13.0 01)

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