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WCDMA RAN

CBSFeature Parameter Description

Copyright Huawei Technolog ies Co., Ltd. 2010. All righ ts reserved.

No part of this document may be reproduced or transmitted in any form or by any means without prior writtenconsent of Huawei Technologies Co., Ltd.

Trademarks and Permissions

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

Notice

The purchased products, services and features are stipulated by the commercial contract made betweenHuawei and the customer. All or partial products, services and features described in this document may not bewithin 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 orrepresentations 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, andrecommendations in this document do not constitute the warranty of any kind, express or implied.

Huawei Proprietary and ConfidentialCopyright Huawei Technologies Co., Ltd

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WCDMA RANCBS Contents

Issue 01 (2010-03-30) Huawei Proprietary and ConfidentialCopyright Huawei Technologies Co., Ltd

iii

Contents

1 Introduction ................................................................................................................................1-11.1 Scope............................................................................................................................................1-11.2 Intended Audience ........................................................................................................................1-11.3 Change History..............................................................................................................................1-1

2 Overview of CBS .......................................................................................................................2-13 Technical Descrip tion ..............................................................................................................3-1

3.1 External CBC.................................................................................................................................3-13.1.1 System Architecture..............................................................................................................3-13.1.2 CBS Message Scheduling and Forwarding.........................................................................3-13.1.3 Network Topology with the Iu-BC Interface.......................................................................... 3-2

3.2 Built-in CBC ...................................................................................................................................3-43.2.1 System Architecture..............................................................................................................3-43.2.2 Warning of Disaster..............................................................................................................3-43.2.3 Message Construction in the RNC .......................................................................................3-5

4 Engineering Guidelines...........................................................................................................4-14.1 CBS Configuration in the Case of the External CBC ....................................................................4-1

4.1.1 Activating the External CBC License....................................................................................4-14.1.2 Configuring the Iu-BC Interface............................................................................................4-14.1.3 Configuring CBS in Iu-BC over IP Mode..............................................................................4-14.1.4 Configuring CBS in Iu-BC over ATM Mode..........................................................................4-24.1.5 Configuring CBS for a Cell at the Radio Network Layer ......................................................4-24.1.6 Verifying CBS .......................................................................................................................4-44.1.7 Deactivating CBS .................................................................................................................4-4

4.2 CBS Configuration in the Case of Built-in CBC ............................................................................ 4-54.2.1 Activating the Built-in CBC License......................................................................................4-54.2.2 Configuring CBS...................................................................................................................4-54.2.3 Adjusting the CBS Configurations ........................................................................................4-64.2.4 Deactivating CBS .................................................................................................................4-7

5 Parameters .................................................................................................................................5-16 Counters ......................................................................................................................................6-17 Glossary ......................................................................................................................................7-18 Reference Documents .............................................................................................................8-1

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WCDMA RANCBS 1 Introduction


1-1

1 Introduction

1.1 Scope

This document describes the CBS feature and related functions on which CBS is based. It providesparameters associated with this feature and guidelines for configuring these parameters.

1.2 Intended Audience

This document is intended for:

zPersonnel who are familiar with WCDMA basics

zPersonnel who need to understand CBS

zEngineers who work on 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:

zFeature change: refers to the change in the CBS feature.

zEditorial change: refers to the change in wording or the addition of the information that was notdescribed in the earlier version.

Document Issues

The document issues are as follows:

z01 (2010-03-30)

zDraft (2009-12-05)

01 (2010-03-30)

This is the document for the first commercial release of RAN12.0.

Compared with issue Draft (2009-12-05) of RAN12.0, this issue optimizes the description.

Draft (2009-12-05)

This is the draft of the document for RAN12.0.

Compared with issue 02 (2009-06-30) of RAN11.0, this issue incorporates the changes described in the

following table.

Change Type Change Descrip tion Parameter Change

Feature change The Warning of Disaster feature is added. None

Editorial change None. None

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WCDMA RANCBS 2 Overview of CBS


2-1

2 Overview of CBS

Cell broadcast service (CBS) provides a cell broadcast system that is supplemental to the existing digitalmobile communication platform. Through the cell broadcast system, the RNC sends specific short

messages to cells in a designated area, and consequently the cells broadcast the messages to all theUEs within the coverage.

The CBS provides the point-to-multipoint service for 3G network users.

The messages broadcast by using the CBS are known as CBS messages. The UE supporting the CBSfeature constantly detects the CBS messages and notify users of the messages received.

The CBS feature has the following advantages:

zCompared with the point-to-point service, the CBS enables multiple UEs to receive the same message,thus saving system resources.

zCBS service areas (SAs) map with physical cells in a one-on-one manner. This enables messages to

be broadcast in designated areas.To meet the customers' requirements efficiently, Huawei employs two types of cell broadcast center(CBC) to implement the CBS feature, namely, external CBC and built-in CBC.

When the external CBC (WRFD-011000 Cell Broadcast Service) is used, it sends messages to the RNCthrough the Iu-BC interface and then the RNC forwards the messages to UEs.

When the built-in CBC (WRFD-011001 Simplified Cell Broadcast) is used, the RNC housing the built-inCBC constructs messages and delivers them to UEs.

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WCDMA RANCBS 3 Technical Description


3-1

3 Technical Description

The external CBC and built-in CBC are used in different scenarios to meet different demands ofcustomers.

3.1 External CBC

This section describes the system architecture, CBS message scheduling and forwarding, and networktopology with the Iu-BC interface configured.

3.1.1 System Architecture

The CBC, as a part of the core network (CN), is connected to multiple RNCs through the Iu-BC interface.The CBC manages the CBS messages, whereas the UMTS radio access network (UTRAN) performstransparent transmission of the CBS messages from the CBC.

A common traffic channel (CTCH) needs to be configured for each cell supporting the CBS feature. The

CTCH is mapped onto a FACH.

Figure 3-1 shows the system architecture when the external CBC is configured

Figure 3-1 System architecture when the external CBC is configured

CBC: cell broadcast center RNS: radio network subsystem

SAC: service area code UTRAN: UMTS radio access network

3.1.2 CBS Message Scheduling and Forwarding

When the external CBC is used, the CBS implementation procedure is as follows:

1. The external CBC sends a CBS message to the RNC over the Iu-BC interface. The messagecontains service requirements such as the broadcast interval, broadcast times, and broadcast area.

2. On receipt of the message, the RNC saves it to the buffer.

3. The RNC schedules and forwards the message based on the CTCH bandwidth and the servicerequirements.

4. The RNC deletes the CBS message from the buffer.

The UEs in a CBS-capable cell receive CBS messages of the user-defined types. UEs in idle mode or in

the CELL_PCH or URA_PCH state can receive the CBS messages.

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3 Technical DescriptionWCDMA RAN

CBS


3.1.3 Network Topology with the Iu-BC Interface

The external CBC supports only Iu-BC over IP. Therefore, switching from TCP/IP to IP over ATM (IPoA)must be performed if the ATM transmission mode is used on the Iu-BC interface.

Networking solutions are different in Iu-BC over IP mode and in Iu-BC over ATM mode.

Networking Solution in Iu-BC over IP ModeFigure 3-2 shows the networking solution in Iu-BC over IP mode.

Figure 3-2 Networking solution in Iu-BC over IP mode

CBE: cell broadcast entity

The advantage and disadvantage of this networking solution are as follows:

zAdvantageThis networking solution provides flexible networking and simple configuration.

zDisadvantage

If the IP addresses of the RNC and CBC are on different network segments, a route needs to beconfigured and extra routing devices need to be added. This leads to increase in the cost.

Networking Solution in Iu-BC over ATM Mode

Figure 3-3 shows the networking solution in Iu-BC over ATM mode. In this mode, the ATM switchimplements the switching from the TCP/IP protocol stack to the IPoA protocol stack.

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3-3

Figure 3-3 Networking solution in Iu-BC over ATM mode

The advantage and disadvantage of this networking solution are as follows:

zAdvantage

Additional devices are not required.

zDisadvantage

There are potential risks that the CN equipment of other vendors does not interoperate with Huaweiexternal CBC.

3.1.4 Protocol and Signaling

Figure 3-2 shows the protocol stack of CBS

Figure 3-4 CBS protocol stack

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3 Technical DescriptionWCDMA RAN

CBS


he signaling procedures exchanged between CBC and RNC are listed as follows:

place the old

z

fic

z

z

CBS service is available again, RNC notify the CN the cell

z

send the cell name and messages to UEs through messages on a regular

constructs messages and delivers them to UEs. A message can

figured.

T

zWrite-Replace procedure: this procedure is used to broadcast new messages or remessages.

Kill procedure: this procedure is used to stop broadcast of specific messages in specific cells.

zLoad Status Enquiry procedure: CBC enquiry the available bandwidth for broadcasting in specicells.

Message Status Enquiry procedure: enquiry the CBS message status (number of transmitting specificmessage in a cell)

Reset: stop CBS service in specific cells.

zRestart Indication: when cells resume andstatus.

Failure Indication: RNC notify CN that CBS service in a cell fails.

For details, see 3GPP TS 23.041.

3.2 Buil t-in CBCThe built-in CBC is used tobasis. Its function is achieved through software. In addition to the basic CBS function, Huawei built-inCBC also provides a warning of disaster function. The built-in CBC sends normal broadcast messages inthe normal case and sends emergency broadcast messages in case of emergencies.

3.2.1 System Architecture

When the built-in CBC is used, the RNCbe specifically configured for each cell, and the cell name and messages can be periodically sent to theUEs. The broadcast interval and broadcast times are user-definable.

Figure 3-4 shows the system architecture when the built-in CBC is con

Figure 3-5 System Architecture when the built-in CBC is configured

.2.2 Warning of Disaster

-020127 Warning of Disaster.

3

This section describes the feature WRFD

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3-5

The warning of disaster function is used to inform UEs in a designated area of disasters or breakingevents through broadcast. The purpose is to enable the subscribers to respond cautiously toemergencies.

The warning of disaster function is supported by only the built-in CBC. When the function is applied, the

RNC constructs messages and delivers them to UEs in a designated area. The designated area can bea single cell, multiple cells, or all cells under the RNC.

The warning of disaster function enables the network operators to compose emergency messages onthe OM console when disasters (such as earthquake, tsunami, and hurricane) occur. Then, the OMconsole requests the RNC to send the emergency messages to all the UEs in the designated area. TheRNC sends the messages within four seconds after receiving the request.

3.2.3 Message Construction in the RNC

In the built-in CBC case, the RNC needs to simulate functions of a CBS server by constructing CBSmessages. The following messages need to be constructed:

zWrite-Replace message: This message is used to carry information. It is constructed and sent by theRNC.

zKILL message: When the CBS function is disabled and the function is deactivated in the cell, the RNCneeds to send a KILL message to the cell to stop the cell broadcasting CBS messages.

The RNC does not need to send the Write-Replace response message or the KILL response message tothe CN.

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WCDMA RANCBS 4 Engineering Guidelines


4-1

4 Engineering Guidelines

The following provides engineering guidelines regarding the configuration of CBS.

4.1 CBS Configuration in the Case of the External CBCThis section describes the CBS configuration procedure when the external CBC is used.

4.1.1 Activating the External CBC License

When the RNC uses the external CBC, the CBS license is required. To activate the CBS license,perform the following steps:

1. Obtain a new license file.

2. Upload the license file to the BAM installation directory\FTP\license directory on the OMU byusing the FTP.

3. Run theACT LICENSE command on the M2000 or RNC LMT to activate the license file.4. Run the SET LICENSE command on RNC LMT to set the CBS license.

4.1.2 Conf iguring the Iu-BC Interface

To configure the Iu-BC interface, you must configure related data according to the actual networktopology.

The IP addresses on the Iu-BC interface can be shared. The device IP address of the Iu-BC interface board, however,must be configured exclusively and cannot be shared.

4.1.3 Conf iguring CBS in Iu-BC over IP ModeRNC Configuration

zAdd an IP address of the Ethernet port.

Run theADD ETHIP command to add the IP address of the Ethernet port.

The IP address of the Ethernet port connected to the CBC and the IP address of the CBC must beon the same network segment.

zAdd the device IP address of the interface board.

Run theADD DEVIP command to add the device IP address of the interface board.

The IP address of the RNC interface board must be the same as the CBS IP address.

zAdd the CBS configuration. Run theADD UCBSADDR command to add the TCP IP address used for the SOCKET

communication between the CBC and the RNC.

If the RNC IP address and the CBC IP address are on different network segments, configure therelated route before running the preceding command to ensure that the IP link works properly.

Router Configuration

For details, see the associated router configuration document. The data must be negotiated with theRNC.

CBC Configuration

Configure the IP address of the CBC and the route from the CBC to the RNC.

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4 Engineering GuidelinesWCDMA RAN

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4.1.4 Configuring CBS in Iu-BC over ATM Mode

RNC Configuration

zAdd the device IP address of the interface board.

Run theADD DEVIP command to add the device IP address of the interface board. This device IPaddress and the IP address of the ATM switch must be on the same network segment. The IP addressof the RNC interface board must be the same as the CBS IP address.

zAdd an IPoA PVC to the ATM switch.

Run theADD IPOAPVC command to add an IPoA PVC between the local IPoA client and the peerIPoA client.

IPADDR: IP address of the local Ethernet port

PEERIPADDR: IP address of the ATM switch

The local IP address and the peer IP address must be on the same subnet.

The VPI and VCI must be the same as the settings of the ATM switch.

zAdd an IP route.

Run theADD IPRT command to add a route from the interface board to the CBC. The route passes anIP address of the ATM switch.

DSTIP: IP address of the CBC. You can query this IP address by running the IPCONFIG commandon a CBC local computer.

NEXTHOP: IP address of the ATM switch. By using this IP address, the ATM switch exchangesinformation between the interface board and the Ethernet port that is connected to the CBC.

zAdd the CBS configuration.

Run theADD UCBSADDR command to add the CBS IP address of the RNC, namely, the TCP IPaddress used for the SOCKET communication between the CBC and the RNC.

RNCIPADDR: CBS IP address of the RNC

CBCIPADDR: IP address of the CBC

ATM Switch Conf igurat ion

Set the IP address of the Ethernet port of the ATM switch and configure the IPoA client, IPoA PVC, andIPoA route from the ATM switch to the RNC. The data must be negotiated with the RNC. The VCI andVPI must be consistent with the settings of the RNC.

CBC Configuration

Configure the IP address of the CBC and the route from the CBC to the RNC.

4.1.5 Conf iguring CBS for a Cell at the Radio Network Layer

The CBS setup process consists of the following tasks:

1. Setting up a CTCH

2. Configuring the RLC for the CTCH

3. Configuring the Broadcast/Multicast Control (BMC)

4. Updating the system information on the Iub interface

5. Sending the RESTART IND message on the Iu-BC interface

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4-3

When configuring CBS for a cell, ensure that the configurations of cell-level parameters in IP mode andATM mode are consistent. Figure 4-1 shows the procedure for configuring CBS for a cell (at the radionetwork layer).

Figure 4-1 Procedure for configuring CBS for a cell

The procedure for configuring CBS for a cell is as follows:

Step 1 Run theADD UCTCH command to add the CTCH for the cell supporting CBS.

FACH ID is the unique identifier of an FACH in a cell. You need to negotiate the channel configuration scheme with NodeBengineers according to the channel specifications supported by the NodeB.

S

S

tep 2 Run theADD UCELLCBSDRX command to set the CBS DRX scheduling parameters for the cellsupporting CBS.

tep 3 Run theADD UCELLCBSSAC command to set the SAC that identifies the service area (SA) forthe cell supporting CBS.

zYou can add a specific CBS cell to the CBS SA by setting the cell ID (CELLID).

z CBS SAC identifies a CBS cell. The SAC is determined in network planning.

z CBS SAs are different from CS/PS SAs. CBS SAs have a one-on-one correspondence with physical cells.

Step 4 Run theADD UCELLCBSSAC command to enable CBS in a cell. You can enable CBS onlyafter other radio network layer configurations are complete. After CBS is enabled, you canmonitor the RESTART IND message on the Iu-BC interface and the CBS scheduling messageon the Uu interface.

----End

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CBS


S

S

S

S

4.1.6 Verifying CBS

After the previous tasks are complete, verify that the CBS feature is activated by performing the followingsteps:

tep 1 Run theACT UCELLCBS command.

tep 2 Start Iu interface tracing and verify that the Load Query Rsp message from the CBC is displayed.

tep 3 Start Uu interface tracing on the LMT and verify that the UU_BMC_TYPE_MSG message fromthe CBC is displayed.

tep 4 Use a CBS-supportive UE to make a test and verify that the UE can receive CBS messages.

----End

4.1.7 Deactivating CBS

Run the DEA UCELLCBS to deactivate the CBS feature.

Deleting CBS Configurations in Iu-BC over IP Mode

To delete the CBS configurations in Iu-BC over IP mode, perform the following operations:

zDelete the configurations of the radio channels and parameters of the CBS by running the followingcommands:

RMV UCTCH

RMV UCELLCBSDRX

RMV UCELLCBSSAC

zDelete the TCP IP address for SOCKET communication between the RNC and CBC by running thefollowing command:

RMV UCBSADDR

zDelete the IP addresses of the Ethernet ports by running the following command:

RMV ETHIP

zDelete the CBS IP address of the RNC by running the following command:

RMV DEVIP

Deleting CBS Configurations in Iu-BC over ATM Mode

To delete the CBS configurations in Iu-BC over ATM mode, perform the following operations:

zDelete the configurations of the radio channels and parameters of the CBS by running the followingcommands:

RMV UCTCH

RMV UCELLCBSDRX

RMV UCELLCBSSAC

zDelete the IPoA client, IPoA PVC, and IPoA route from the RNC by running the following commands:

RMV IPRT

RMV IPOAPVC

zDelete the IPoA client and IPoA PVC from the ATM switch.

zFrom the ATM switch, delete the IP address of the Ethernet port that connects the ATM switch and the

CBC.

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4-5

zDelete the IP address of the CBC and the route from the CBC to the RNC.

DOS command: route delete route address mask subnet mask gateway

4.2 CBS Configuration in the Case of Buil t-in CBC

4.2.1 Act ivating the Buil t-in CBC License

When the RNC uses the built-in CBC, the CBS license is required. That is, you must apply for andactivate the CBS license before using the CBS feature. To enable the warning of disaster feature, ensurethat the associated license has been obtained.

4.2.2 Configuring CBS

Adding the CBS Configurations Related to Normal Broadcast Messages

S

S

S

S

S

S

tep 1 Set the IP address and associated parameters of the built-in CBC.

zRun theADD URNCCBCPUID command to configure the subsystem for managing the built-in CBC.zRun the SET URNCCBPARA command to enable the CBC function by setting CB Switch to ON.

tep 2 Configure radio channels and parameters of the CBS

zRun theADD UCTCH command to add the CTCH.

zRun theADD UCELLCBSDRX command to set the CBS DRX scheduling parameters.

zRun theADD UCELLCBSSAC command to add the CBS SA and cell broadcast content.

tep 3 Activate the CBS by running the following command:

ACT UCELLCBS

----End

Adding the CBS configurat ions Related to Emergency Broadcast Messages

tep 1 Configure the IP address and associated parameters of the built-in CBC.

zRun theADD URNCCBCPUID command to configure the subsystem for managing the built-in CBC

zRun the SET URNCCBPARA command to enable the CBC function and warning of disaster functionby setting CTCH switch of cell broadcast to ON.

tep 2 Add a designated broadcast area by running the following command:

ADD UCBSAREA

tep 3 Add a cell broadcast message by running the following command:

ADD UCBSMSG

----End

Deleting the CBS configurations Related to Normal Broadcast Messages

To delete the built-in CBC for normal broadcast messages, perform the following operations:

zDelete the configurations of the CBS radio network layer channels and parameters by running thefollowing commands:

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CBS


RMV UCTCH

RMV UCELLCBSDRX

RMV UCELLCBSSAC

zDelete the configuration of the subsystem for managing the built-in CBC by running the following

command:

RMV URNCCBCPUID

zDisable the CBS function by running the following command:

SET URNCCBPARA (set CB Switch to OFF).

Deleting the CBS configurations Related to Emergency Broadcast Messages

To delete the built-in CBC for normal broadcast messages, perform the following operations:

zDelete the emergency broadcast message by running the following command:

RMV UCBSMSG

zDelete the designated broadcast area by running the following command: RMV UCBSAREA

zDelete the configuration of the subsystem for managing the built-in CBC by running the followingcommand:

RMV URNCCBCPUID

zDisable the broadcasting function by running the following command:

SET URNCCBPARA (set the CTCH switch of cell broadcast to OFF)

4.2.3 Adjusting the CBS Configurations

Table4-1 lists the MML commands used for adjusting the built-in CBC. For details, see the MML

command online help.

Table 4-1 MML commands for adjusting the built-in CBC

Operation Command

For the RNC built-in CBCbroadcast parameters

Set the broadcast parameters of the built-inCBC

SET URNCCBPARA

Add the information about the CTCH of a cell ADD UCTCH

Modify the information about the CTCH of a cell MOD UCTCH

For the Information aboutthe CTCH of a cell

Delete the information about the CTCH of a cell RMV UCTCH

Add the CBS SA and normal broadcastmessage

ADD CELLCBSSAC

Modify the CBS SA MOD CELLCBSSAC

For the CBS SA andnormal broadcastmessage

Delete the CBS SA RMV CELLCBSSAC

List the CBS AREA LST UCBSAREA

Add the CBS AREA ADD UCBSAREA

For the CBS AREA

Delete the CBS AREA RMV UCBSAREA

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4-7

Operation Command

Add the emergency broadcast message ADD UCBSMSG

Modify the emergency broadcast message MOD UCBSMSG

Delete the emergency broadcast message RMV UCBSMSG

For the emergencybroadcast message

Query the emergency broadcast message DSP UCBSMSG

4.2.4 Deactivating CBS

To deactivate the CBS function of a single cell, run the DEA UCELLCBS command.

To deactivate the CBS function of the entire RNC, run the SET URNCCBPARA command to disable theCBS function of the RNC.

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WCDMA RANCBS 5 Parameters


5-1

5 Parameters

Table 5-1 Parameter description

ParameterID NE MML Descrip tion

CBCIPADDR BSC6900

ADDUCBSADDR(Mandatory)MODUCBSADDR(Optional)

Meaning: IP address of the CBC (CellBroadcast Center)GUI Value Range: NoneActual Value Range: 0.0.0.0~255.255.255.255Unit: NoneDefault Value: None

DSTIP BSC6900

ADD IPRT(Mandatory)MOD IPRT(Mandatory)

Meaning: Destination IP addressGUI Value Range: NoneActual Value Range: 0.0.0.0~255.255.255.255

Unit: NoneDefault Value: None

IPADDR BSC6900

ADDIPOAPVC(Mandatory)MODIPOAPVC(Mandatory)

Meaning: Local IP addressGUI Value Range: NoneActual Value Range: 0.0.0.0~255.255.255.255Unit: NoneDefault Value: None

NEXTHOP BSC6900

ADD IPRT(Mandatory)MOD IPRT(Mandatory)

Meaning: IP address of the next hopGUI Value Range: NoneActual Value Range: 0.0.0.0~255.255.255.255Unit: None

Default Value: None

PEERIPADDR

BSC6900

ADDIPOAPVC(Mandatory)MODIPOAPVC(Mandatory)

Meaning: Peer IP address

GUI Value Range: NoneActual Value Range: 0.0.0.0~255.255.255.255Unit: NoneDefault Value: None

RNCIPADDR BSC6900

ADDUCBSADDR(Mandatory)MODUCBSADDR(Optional)

Meaning: IP address of the RNCGUI Value Range: NoneActual Value Range: 0.0.0.0~255.255.255.255Unit: None

Default Value: None

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WCDMA RANCBS 6 Counters


6-1

6 Counters

There are no specific counters associated with this feature.

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WCDMA RANCBS 7 Glossary


7-1

7 Glossary

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

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WCDMA RANCBS 8 Reference Documents

Issue 01 (2010-03-30) Huawei Proprietary and ConfidentialC i ht H i T h l i C Ltd

8-1

8 Reference Documents

[1] 3GPP TS 25.324 "Broadcast/Multicast Control (BMC)

[2] 3GPP TS 25.419 "UTRAN Iu-BC Interface: Service Area Broadcast Protocol (SABP)