Access Control(GBSS15.0 01)

GSM BSS GBSS15.0

Access Control Feature Parameter Description Issue

01

Date

2013-05-06

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2013. 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 01 (2013-05-06)

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

i

GSM BSS Access Control Feature Parameter Description

Contents

Contents 1 About This Document..................................................................................................................1 1.1 Scope..............................................................................................................................................................................1 1.2 Intended Audience..........................................................................................................................................................1 1.3 Change History...............................................................................................................................................................1

2 Overview.........................................................................................................................................3 2.1 Introduction....................................................................................................................................................................3 2.2 Feature Support by NE...................................................................................................................................................3

3 Principles.........................................................................................................................................4 4 Strategy............................................................................................................................................5 5 Engineering Guidelines...............................................................................................................7 5.1 Deploying Access Control Class (ACC)........................................................................................................................7 5.1.1 Deployment Requirements..........................................................................................................................................7 5.1.2 Feature Activation.......................................................................................................................................................7 5.1.3 Activation Observation................................................................................................................................................9 5.1.4 Deactivation...............................................................................................................................................................10

6 Parameters.....................................................................................................................................12 7 Counters........................................................................................................................................19 8 Glossary.........................................................................................................................................20 9 Reference Documents.................................................................................................................21

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1 About This Document

1

About This Document

1.1 Scope This document describes the GBFD-511002 Access Control Class(ACC) feature, including its concept, implementation, and technical principles.

1.2 Intended Audience This document is intended for: l

Personnel who need to understand the ACC feature

l

Personnel who work with Huawei GSM 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: refers to a change in the ACC feature of a specific product version.

l

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

Document Issues The document issue is as follows: l

01 (2013-05-06)

l

Draft A (2013-02-27)

01 (2013-05-06) This is the first commercial release of GBSS15.0. Compared with Draft A (2013-02-27), Issue 01 (2013-05-06) has no change. Issue 01 (2013-05-06)


1


1 About This Document

Draft A (2013-02-27) This is a draft. Compared with Issue 01 (2012-04-28) of GBSS14.0, Draft A (2013-02-27) of GBSS15.0 incorporates the changes described in the following table.

Issue 01 (2013-05-06)

Change Type

Change Description

Parameter Change

Feature change

Added descriptions about the BSC6910 and eGBTS. Added section "2.2 Feature Support by NE."

None

Editorial change

Added chapter "5 Engineering Guidelines."

None


2


2 Overview

2

Overview

2.1 Introduction With the ACC feature, the BSC can control the number of MSs accessing the network at a certain time by allowing only the MSs of a certain ACC class to access the network. This avoids the base station subsystem (BSS) overload or mobile switching center (MSC) overload caused by the simultaneous access of numerous MSs. In addition, the ACC feature uses a sliding window mechanism to enable the MSs of all ACC classes to access the network. This way, radio services are available for all MSs, especially in emergencies. In emergencies such as during natural disasters, the traffic in the network increases sharply. The traffic may increase to an extent that exceeds the network capacity. In such a case, subscribers have difficulties in making calls, and the radio network may be down. To resolve this problem, the ACC feature is introduced. This feature controls the number of MSs that access the network in emergencies by allowing only the MSs of certain ACC classes to access the network, ensuring that the radio network works properly.

2.2 Feature Support by NE Table 2-1 Feature support by NE Feature

BSC6900

BSC6910

GBTS

eGBTS

Access Control Class(ACC)

√

√

√

√

NOTE

√ indicates that the NE supports this feature. × indicates that the NE does not support this feature.

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3 Principles

3

Principles

When registered in a GSM network, an MS is assigned a common ACC class, ranging from Class 0 to Class 9, Class 10 to emergency call, or a special ACC class, ranging from Class 11 to Class 15. The BSC indicates in the system messages the access classes of the MSs that are allowed to access the network. The ACC feature uses a window sliding mechanism to allow only the MSs of a certain ACC class to access the network at a certain time. The size and speed of the sliding window is specified in the ACCCTRLPY(GSM BSC6900,GSM BSC6910) parameter. There are 16 ACC classes. Class 0 to Class 9 are common classes and are specified for common voice and data services; Class 10 to emergency; Class 11 to Class 15 are special classes and are specified for services such as emergency call. Currently, the BSC controls only the access of MSs of Class 0 to Class 9. The ACC feature is implemented by the MS, BSS, and MSC/VLR as a joint effort. The principles are as follows: 1.

The access class of MSs of special classes is set to a high priority.

2.

When an MSC/VLR is excessively overloaded and the access side of the MSC/VLR is congested, the BSC under the MSC/VLR controls the access of the MSs in certain cells. Only the MSs having high access priorities and certain MSs of common classes use the random access channel (RACH) to access the radio network.

3.

The BSC broadcasts the class in which MSs are allowed to access a network.

4.

The MS matches its class information stored in the SIM card and that in the broadcast information. If allowed, the MS uses the RACH to access the radio network. Otherwise, the access of the MS is barred.

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4 Strategy

4

Strategy

When ACCCTRLEN(GSM BSC6900,GSM BSC6910) is set to YES(Yes), the ACC feature is enabled in a cell. After the feature is enabled, the BSC determines the MSs allowed to access the network by sending system information (SI) that carries the ACC classes according to the policy specified by ACCCTRLPY(GSM BSC6900,GSM BSC6910). If the current ACC policy is changed or the MS uses another policy, the BSC sends SI that carries the ACC classes again. The value range of ACCINDEX(GSM BSC6900,GSM BSC6910) is 0 to 31. Each control policy is configured with ACCWPOS(GSM BSC6900,GSM BSC6910), ACCWSIZE(GSM BSC6900,GSM BSC6910), and ACCWSP(GSM BSC6900,GSM BSC6910). ACCWSP(GSM BSC6900,GSM BSC6910) specifies the sliding speed of the ACC sliding window, ACCWPOS (GSM BSC6900,GSM BSC6910) specifies the starting point of the ACC sliding window, and Access Control Window Size specifies the ACC sliding window size in an access control policy. MSs of the ACC access classes that are specified in the sliding window are not allowed to access the network. For example, if ACCINDEX(GSM BSC6900,GSM BSC6910) is set to 1, ACCWPOS(GSM BSC6900,GSM BSC6910) to 0, ACCWSIZE(GSM BSC6900,GSM BSC6910) to 2, and ACCWSP(GSM BSC6900,GSM BSC6910) to 120s, the MSs of Class 0 and Class 1 are forbidden to access the network during the first period (first 120s); the MSs of Class 2 and Class 3 are forbidden to access the network during the second period (second 120s), and the MSs of other classes . Figure 4-1 shows the time assignment principle.

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4 Strategy

Figure 4-1 Assignment of ACC classes by time

The description of Figure 4-1 is as follows: The sliding window mechanism allows the BSC to send ACC classes based on ACCWSP(GSM BSC6900,GSM BSC6910) and ACCWSIZE(GSM BSC6900,GSM BSC6910). In this manner, MSs of different ACC classes can access the radio network and radio services are available for all MSs even in emergencies.

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5 Engineering Guidelines

5

Engineering Guidelines

5.1 Deploying Access Control Class (ACC) 5.1.1 Deployment Requirements Table 5-1 Deployment requirements Aspect

Requirement

Related features

None

BSC

None

BTS

None

GSM networking

None

MS

MSs and their subscriber identity module (SIM) cards meet the ACC-related requirements specified by GSM protocols.

MSC

None

License

The license controlling this feature has been activated. For details on how to activate the license, see License Management Feature Parameter Description. For details about license items, see License Control Item Description.

Others

None

5.1.2 Feature Activation Using the LMT On the BSC LMT, perform the following steps: Issue 01 (2013-05-06)


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Step 1 Run the ADD BSCACCCTRLP command with Access Control Policy Index, Access Control Window Size, Starting Point of the Access Control Window, and Sliding Speed of the Access Control Window set as required. NOTE

A maximum of 32 access control policies can be set. To set multiple access control policies, perform this step for multiple times.

If an access control policy is enabled and the BSC has sent the system information (SI) to MSs, the access of the MSs of classes 10 to 15 is not affected by the configuration of the access control policy. Step 2 Run the SET GCELLCCBASIC command with Access Control Allowed set to YES(Yes) and Access Control Policy set to the value of Access Control Policy Index specified in step 1. ----End

MML Examples //Activating Access Control Class (ACC) ADD BSCACCCTRLP: ACCINDEX=0; SET GCELLCCBASIC: IDTYPE=BYID, CELLID=0, ACCCTRLEN=YES, ACCCTRLPY=0;

Using the CME NOTE

When configuring the Access Control Class (ACC) feature on the CME, you must perform a single configuration first, and then perform batch modifications if required. You must perform a single configuration for a parameter before batch modifications of the parameter. You are advised to perform batch modifications before logging out of the parameter setting interface.

Step 1 Configure a single object on the CME. (CME single configuration) Set parameters on the CME configuration interface according to the operation sequence described in Table 5-2. For the method of performing the CME single configuration, see the CME Single Configuration Operation Guide. Step 2 (Optional) Modify objects in batches on the CME. (CME batch modification center) icon on the To modify objects, such as BSCs, BTSs, cells, and TRXs, in batches, click the CME configuration interface to start the batch modification wizard. For the method of performing batch modifications through the CME batch modification center, press F1 on the wizard interface to obtain online help. ----End

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Table 5-2 Configuring parameters on the CME SN

Managed Object (MO)

NE

Paramet er Name

Parameter ID

Supports CME Batch Modificati on Center

1

BSCACCCTR LP

BSC6900/BSC6910

Access Control Policy Index

ACCINDEX

Yes

Access Control Window Size

ACCWSIZE

Starting Point of the Access Control Window

ACCWPOS

Sliding Speed of the Access Control Window

ACCWSP

Access Control Allowed

ACCCTRLE N

Access Control Policy

ACCCTRLP Y

NOTE A maximum of 32 access control policies can be set. To set multiple access control policies, configure this MO for multiple times. If an access control policy is enabled and the BSC has sent the SI to MSs, the access of the MSs of classes 10 to 15 is not affected by the configuration of the access control policy.

2

GCELLCCBA SIC

BSC6900/BSC6910

Yes

5.1.3 Activation Observation On the BSC LMT, perform the following steps: Step 1 Run the LST GCELLCCBASIC command to query the values of Access Control Allowed and Access Control Policy. Expected result: The value of Access Control Allowed is Yes and Access Control Policy is specified. Step 2 Run the LST BSCACCCTRLP command to query the values of Access Control Window Size, Starting Point of the Access Control Window, and Sliding Speed of the Access Control Window. Issue 01 (2013-05-06)


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Expected result: The values of Access Control Window Size, Starting Point of the Access Control Window, and Sliding Speed of the Access Control Window are the configured ones. Step 3 Trace radio signaling link (RSL) messages on the Abis interface. NOTE

The access-control-class field in the RACH Control Parameters information element (IE) is called the ACC field. The ACC field contains two octets and is 16 bits in length. Each bit indicates a level of SIM users and its value is 0 or 1. When a bit is 0, the SIM users of the corresponding level are allowed to access the network. When a bit is 1, the SIM users of the corresponding level are forbidden to access the network.

Expected result: The SI contains the RACH Control Parameters IE, and the value of the bits in the ACC field of the RACH Control Parameters IE is 1 from the starting point onwards within the sliding window range. Step 4 Use an MS to make a call within the period specified in step 1. Expected result: If the level of the SIM card of the MS falls into the forbidden levels, the MS cannot access the network. If the level of the SIM card falls into the allowed levels, the MS can access the network properly. ----End

5.1.4 Deactivation Using the LMT On the BSC LMT, run the SET GCELLCCBASIC command to disable the ACC feature in a cell. In this step, set Access Control Allowed to NO(No).

MML Examples //Deactivating Access Control Class (ACC) SET GCELLCCBASIC: IDTYPE=BYID, CELLID=0, ACCCTRLEN=NO;

Using the CME Step 1 Configure a single object on the CME. (CME single configuration) Set parameters on the CME configuration interface according to the operation sequence described in Table 5-3. For the method of performing the CME single configuration, see the CME Single Configuration Operation Guide. Step 2 (Optional) Modify objects in batches on the CME. (CME batch modification center) icon on the To modify objects, such as BSCs, BTSs, cells, and TRXs, in batches, click the CME configuration interface to start the batch modification wizard. For the method of performing batch modifications through the CME batch modification center, press F1 on the wizard interface to obtain online help. ----End

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Table 5-3 Configuring the parameter on the CME

Issue 01 (2013-05-06)

SN

MO

NE

Parameter Name

Parameter ID

Supports CME Batch Modificati on Center

1

GCELLCCB ASIC

BSC6900/ BSC6910

Access Control Allowed

ACCCTRLE N

Yes


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6 Parameters

6

Parameters

Table 6-1 Parameter description Parameter ID

NE

MML Command

Feature ID

Feature Name

Description

ACCCTRLPY

BSC6900

SET GCELLCCBA SIC

GBFD-511002

Access Control Class (ACC)

Meaning:This parameter specifies the index of the access control policy that is used in a cell. GUI Value Range:0~31 Unit:None Actual Value Range:0~31 Default Value:None

ACCCTRLPY

BSC6910

SET GCELLCCBA SIC

GBFD-511002


Meaning:This parameter specifies the index of the access control policy that is used in a cell. GUI Value Range:0~31 Unit:None Actual Value Range:0~31 Default Value:None

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6 Parameters

Parameter ID

NE

MML Command

Feature ID

Feature Name

Description

ACCCTRLEN

BSC6900

SET GCELLCCBA SIC

GBFD-511002


Meaning:This parameter specifies whether the access control function is enabled in a cell. When the function is enabled, the BSC determines which MSs in the cell to be connected to the network by sending the ACC classes through system messages according to the specified policy in Access Control Policy. GUI Value Range:NO(No), YES(Yes) Unit:None Actual Value Range:NO, YES Default Value:NO(No)

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6 Parameters

Parameter ID

NE

MML Command

Feature ID

Feature Name

Description

ACCCTRLEN

BSC6910

SET GCELLCCBA SIC

GBFD-511002


Meaning:This parameter specifies whether the access control function is enabled in a cell. When the function is enabled, the BSC determines which MSs in the cell to be connected to the network by sending the ACC classes through system messages according to the specified policy in Access Control Policy. GUI Value Range:NO(No), YES(Yes) Unit:None Actual Value Range:NO, YES Default Value:NO(No)

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6 Parameters

Parameter ID

NE

MML Command

Feature ID

Feature Name

Description

ACCINDEX

BSC6900

ADD BSCACCCTR LP

GBFD-511002


Meaning:This parameter specifies the index of an access control (ACC) policy. It is used to identify an ACC policy.

MOD BSCACCCTR LP RMV BSCACCCTR LP

GUI Value Range:0~31 Unit:None Actual Value Range:0~31 Default Value:None

ACCINDEX

BSC6910

ADD BSCACCCTR LP

GBFD-511002


MOD BSCACCCTR LP RMV BSCACCCTR LP

Meaning:This parameter specifies the index of an access control (ACC) policy. It is used to identify an ACC policy. GUI Value Range:0~31 Unit:None Actual Value Range:0~31 Default Value:None

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6 Parameters

Parameter ID

NE

MML Command

Feature ID

Feature Name

Description

ACCWPOS

BSC6900

ADD BSCACCCTR LP

GBFD-511002


Meaning:This parameter is used to specify the starting point of the ACC sliding window in an access control policy.

MOD BSCACCCTR LP

GUI Value Range:0~9 Unit:None Actual Value Range:0~9 Default Value:0 ACCWPOS

BSC6910

ADD BSCACCCTR LP

GBFD-511002


MOD BSCACCCTR LP

Meaning:This parameter is used to specify the starting point of the ACC sliding window in an access control policy. GUI Value Range:0~9 Unit:None Actual Value Range:0~9 Default Value:0

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6 Parameters

Parameter ID

NE

MML Command

Feature ID

Feature Name

Description

ACCWSIZE

BSC6900

ADD BSCACCCTR LP

GBFD-511002


Meaning:This parameter is used to specify the ACC sliding window size in an access control policy. MSs of the ACC access classes that are specified in the sliding window are not allowed to access the network.

MOD BSCACCCTR LP

GUI Value Range:1~10 Unit:None Actual Value Range:1~10 Default Value:2 ACCWSIZE

BSC6910

ADD BSCACCCTR LP

GBFD-511002


MOD BSCACCCTR LP

Meaning:This parameter is used to specify the ACC sliding window size in an access control policy. MSs of the ACC access classes that are specified in the sliding window are not allowed to access the network. GUI Value Range:1~10 Unit:None Actual Value Range:1~10 Default Value:2

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6 Parameters

Parameter ID

NE

MML Command

Feature ID

Feature Name

Description

ACCWSP

BSC6900

ADD BSCACCCTR LP

GBFD-511002


Meaning:This parameter is used to specify the sliding speed of the ACC sliding window in an access control policy.

MOD BSCACCCTR LP

GUI Value Range:15~7200 Unit:s Actual Value Range:15~7200 Default Value: 120 ACCWSP

BSC6910

ADD BSCACCCTR LP

GBFD-511002


MOD BSCACCCTR LP

Meaning:This parameter is used to specify the sliding speed of the ACC sliding window in an access control policy. GUI Value Range:15~7200 Unit:s Actual Value Range:15~7200 Default Value: 120

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7 Counters

7

Counters

There are no specific counters associated with this feature.

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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

There are no specific reference documents associated with this feature.

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Access Control(GBSS15.0 01)

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