Access Control(GBSS15.0 01)

GSM BSSGBSS15.0

Access Control Feature ParameterDescription

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 writtenconsent 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. NoticeThe purchased products, services and features are stipulated by the contract made between Huawei and thecustomer. All or part of the products, services and features described in this document may not be within thepurchase 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 representationsof any kind, either express or implied.

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Contents

1 About This Document..................................................................................................................11.1 Scope..............................................................................................................................................................................11.2 Intended Audience..........................................................................................................................................................11.3 Change History...............................................................................................................................................................1

2 Overview.........................................................................................................................................32.1 Introduction....................................................................................................................................................................32.2 Feature Support by NE...................................................................................................................................................3

3 Principles.........................................................................................................................................4

4 Strategy............................................................................................................................................5

5 Engineering Guidelines...............................................................................................................75.1 Deploying Access Control Class (ACC)........................................................................................................................75.1.1 Deployment Requirements..........................................................................................................................................75.1.2 Feature Activation.......................................................................................................................................................75.1.3 Activation Observation................................................................................................................................................95.1.4 Deactivation...............................................................................................................................................................10

6 Parameters.....................................................................................................................................12

7 Counters........................................................................................................................................19

8 Glossary.........................................................................................................................................20

9 Reference Documents.................................................................................................................21

GSM BSSAccess Control Feature Parameter Description Contents


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1 About This Document

1.1 ScopeThis document describes the GBFD-511002 Access Control Class(ACC) feature, including itsconcept, implementation, and technical principles.

1.2 Intended AudienceThis document is intended for:

l Personnel who need to understand the ACC featurel Personnel who work with Huawei GSM products

1.3 Change HistoryThis 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 IssuesThe 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.

GSM BSSAccess Control Feature Parameter Description 1 About This Document


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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 GBSS15.0incorporates the changes described in the following table.

Change Type Change Description Parameter Change

Feature change Added descriptions about theBSC6910 and eGBTS.Added section "2.2 FeatureSupport by NE."

None

Editorial change Added chapter "5Engineering Guidelines."

None

GSM BSSAccess Control Feature Parameter Description 1 About This Document


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2 Overview

2.1 IntroductionWith the ACC feature, the BSC can control the number of MSs accessing the network at a certaintime by allowing only the MSs of a certain ACC class to access the network. This avoids thebase station subsystem (BSS) overload or mobile switching center (MSC) overload caused bythe simultaneous access of numerous MSs. In addition, the ACC feature uses a sliding windowmechanism to enable the MSs of all ACC classes to access the network. This way, radio servicesare available for all MSs, especially in emergencies.

In emergencies such as during natural disasters, the traffic in the network increases sharply. Thetraffic may increase to an extent that exceeds the network capacity. In such a case, subscribershave 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 networkin emergencies by allowing only the MSs of certain ACC classes to access the network, ensuringthat the radio network works properly.

2.2 Feature Support by NE

Table 2-1 Feature support by NE

Feature BSC6900 BSC6910 GBTS eGBTS

Access ControlClass(ACC)

√ √ √ √

NOTE

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

GSM BSSAccess Control Feature Parameter Description 2 Overview


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3 Principles

When registered in a GSM network, an MS is assigned a common ACC class, ranging fromClass 0 to Class 9, Class 10 to emergency call, or a special ACC class, ranging from Class 11to Class 15. The BSC indicates in the system messages the access classes of the MSs that areallowed to access the network. The ACC feature uses a window sliding mechanism to allowonly the MSs of a certain ACC class to access the network at a certain time. The size and speedof 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 commonvoice and data services; Class 10 to emergency; Class 11 to Class 15 are special classes and arespecified for services such as emergency call. Currently, the BSC controls only the access ofMSs of Class 0 to Class 9. The ACC feature is implemented by the MS, BSS, and MSC/VLRas 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 therandom 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.

GSM BSSAccess Control Feature Parameter Description 3 Principles


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4 Strategy

When ACCCTRLEN(GSM BSC6900,GSM BSC6910) is set to YES(Yes), the ACC feature isenabled in a cell. After the feature is enabled, the BSC determines the MSs allowed to accessthe network by sending system information (SI) that carries the ACC classes according to thepolicy specified by ACCCTRLPY(GSM BSC6900,GSM BSC6910). If the current ACC policyis 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 policyis configured with ACCWPOS(GSM BSC6900,GSM BSC6910), ACCWSIZE(GSMBSC6900,GSM BSC6910), and ACCWSP(GSM BSC6900,GSM BSC6910). ACCWSP(GSMBSC6900,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, andAccess 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 accessthe network. For example, if ACCINDEX(GSM BSC6900,GSM BSC6910) is set to 1,ACCWPOS(GSM BSC6900,GSM BSC6910) to 0, ACCWSIZE(GSM BSC6900,GSMBSC6910) to 2, and ACCWSP(GSM BSC6900,GSM BSC6910) to 120s, the MSs of Class 0and Class 1 are forbidden to access the network during the first period (first 120s); the MSs ofClass 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.

GSM BSSAccess Control Feature Parameter Description 4 Strategy


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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(GSMBSC6900,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 forall MSs even in emergencies.

GSM BSSAccess Control Feature Parameter Description 4 Strategy


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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 meetthe ACC-related requirements specified by GSM protocols.

MSC None

License The license controlling this feature has been activated. Fordetails on how to activate the license, see LicenseManagement Feature Parameter Description. For detailsabout 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:

GSM BSSAccess Control Feature Parameter Description 5 Engineering Guidelines


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

NOTE

A maximum of 32 access control policies can be set. To set multiple access control policies, perform thisstep 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 controlpolicy.

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 step1.

----End

MML Examples//Activating Access Control Class (ACC)

ADD BSCACCCTRLP: ACCINDEX=0;

SET GCELLCCBASIC: IDTYPE=BYID, CELLID=0, ACCCTRLEN=YES,ACCCTRLPY=0;

Using the CMENOTE

When configuring the Access Control Class (ACC) feature on the CME, you must perform a singleconfiguration first, and then perform batch modifications if required.

You must perform a single configuration for a parameter before batch modifications of the parameter. Youare 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 sequencedescribed in Table 5-2. For the method of performing the CME single configuration, see theCME Single Configuration Operation Guide.

Step 2 (Optional) Modify objects in batches on the CME. (CME batch modification center)

To modify objects, such as BSCs, BTSs, cells, and TRXs, in batches, click the icon on theCME configuration interface to start the batch modification wizard. For the method ofperforming batch modifications through the CME batch modification center, press F1 on thewizard interface to obtain online help.

----End



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Table 5-2 Configuring parameters on the CME

SN ManagedObject (MO)

NE Parameter Name

ParameterID

SupportsCMEBatchModification Center

1 BSCACCCTRLPNOTE

A maximum of32 accesscontrolpolicies can beset. To setmultiple accesscontrolpolicies,configure thisMO formultiple times.If an accesscontrol policyis enabled andthe BSC hassent the SI toMSs, theaccess of theMSs of classes10 to 15 is notaffected by theconfigurationof the accesscontrol policy.

BSC6900/BSC6910 AccessControlPolicyIndex

ACCINDEX Yes

AccessControlWindowSize

ACCWSIZE

StartingPoint oftheAccessControlWindow

ACCWPOS

SlidingSpeed oftheAccessControlWindow

ACCWSP

2 GCELLCCBASIC

BSC6900/BSC6910 AccessControlAllowed

ACCCTRLEN

Yes

AccessControlPolicy

ACCCTRLPY

5.1.3 Activation ObservationOn the BSC LMT, perform the following steps:

Step 1 Run the LST GCELLCCBASIC command to query the values of Access Control Allowedand Access Control Policy.

Expected result: The value of Access Control Allowed is Yes and Access Control Policy isspecified.

Step 2 Run the LST BSCACCCTRLP command to query the values of Access Control WindowSize, Starting Point of the Access Control Window, and Sliding Speed of the Access ControlWindow.



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Expected result: The values of Access Control Window Size, Starting Point of the AccessControl 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 ACCfield. The ACC field contains two octets and is 16 bits in length. Each bit indicates a level of SIM usersand its value is 0 or 1. When a bit is 0, the SIM users of the corresponding level are allowed to access thenetwork. 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 inthe ACC field of the RACH Control Parameters IE is 1 from the starting point onwards withinthe 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 MScannot access the network. If the level of the SIM card falls into the allowed levels, the MS canaccess 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 acell. 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 sequencedescribed in Table 5-3. For the method of performing the CME single configuration, see theCME Single Configuration Operation Guide.

Step 2 (Optional) Modify objects in batches on the CME. (CME batch modification center)

To modify objects, such as BSCs, BTSs, cells, and TRXs, in batches, click the icon on theCME configuration interface to start the batch modification wizard. For the method ofperforming batch modifications through the CME batch modification center, press F1 on thewizard interface to obtain online help.

----End



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Table 5-3 Configuring the parameter on the CME

SN MO NE ParameterName

ParameterID

SupportsCME BatchModification Center

1 GCELLCCBASIC

BSC6900/BSC6910

AccessControlAllowed

ACCCTRLEN

Yes



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6 Parameters

Table 6-1 Parameter description

Parameter ID NE MMLCommand

Feature ID Feature Name Description

ACCCTRLPY BSC6900 SETGCELLCCBASIC

GBFD-511002 Access ControlClass (ACC)

Meaning:Thisparameterspecifies theindex of theaccess controlpolicy that isused in a cell.GUI ValueRange:0~31Unit:NoneActual ValueRange:0~31DefaultValue:None

ACCCTRLPY BSC6910 SETGCELLCCBASIC


Meaning:Thisparameterspecifies theindex of theaccess controlpolicy that isused in a cell.GUI ValueRange:0~31Unit:NoneActual ValueRange:0~31DefaultValue:None

GSM BSSAccess Control Feature Parameter Description 6 Parameters


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ACCCTRLEN BSC6900 SETGCELLCCBASIC


Meaning:Thisparameterspecifieswhether theaccess controlfunction isenabled in a cell.When thefunction isenabled, theBSC determineswhich MSs inthe cell to beconnected to thenetwork bysending theACC classesthrough systemmessagesaccording to thespecified policyin AccessControl Policy.GUI ValueRange:NO(No),YES(Yes)Unit:NoneActual ValueRange:NO, YESDefaultValue:NO(No)



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ACCCTRLEN BSC6910 SETGCELLCCBASIC


Meaning:Thisparameterspecifieswhether theaccess controlfunction isenabled in a cell.When thefunction isenabled, theBSC determineswhich MSs inthe cell to beconnected to thenetwork bysending theACC classesthrough systemmessagesaccording to thespecified policyin AccessControl Policy.GUI ValueRange:NO(No),YES(Yes)Unit:NoneActual ValueRange:NO, YESDefaultValue:NO(No)



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ACCINDEX BSC6900 ADDBSCACCCTRLPMODBSCACCCTRLPRMVBSCACCCTRLP


Meaning:Thisparameterspecifies theindex of anaccess control(ACC) policy. Itis used toidentify an ACCpolicy.GUI ValueRange:0~31Unit:NoneActual ValueRange:0~31DefaultValue:None

ACCINDEX BSC6910 ADDBSCACCCTRLPMODBSCACCCTRLPRMVBSCACCCTRLP


Meaning:Thisparameterspecifies theindex of anaccess control(ACC) policy. Itis used toidentify an ACCpolicy.GUI ValueRange:0~31Unit:NoneActual ValueRange:0~31DefaultValue:None



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ACCWPOS BSC6900 ADDBSCACCCTRLPMODBSCACCCTRLP


Meaning:Thisparameter isused to specifythe starting pointof the ACCsliding windowin an accesscontrol policy.GUI ValueRange:0~9Unit:NoneActual ValueRange:0~9Default Value:0

ACCWPOS BSC6910 ADDBSCACCCTRLPMODBSCACCCTRLP


Meaning:Thisparameter isused to specifythe starting pointof the ACCsliding windowin an accesscontrol policy.GUI ValueRange:0~9Unit:NoneActual ValueRange:0~9Default Value:0



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ACCWSIZE BSC6900 ADDBSCACCCTRLPMODBSCACCCTRLP


Meaning:Thisparameter isused to specifythe ACC slidingwindow size inan accesscontrol policy.MSs of the ACCaccess classesthat arespecified in thesliding windoware not allowedto access thenetwork.GUI ValueRange:1~10Unit:NoneActual ValueRange:1~10Default Value:2

ACCWSIZE BSC6910 ADDBSCACCCTRLPMODBSCACCCTRLP


Meaning:Thisparameter isused to specifythe ACC slidingwindow size inan accesscontrol policy.MSs of the ACCaccess classesthat arespecified in thesliding windoware not allowedto access thenetwork.GUI ValueRange:1~10Unit:NoneActual ValueRange:1~10Default Value:2



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ACCWSP BSC6900 ADDBSCACCCTRLPMODBSCACCCTRLP


Meaning:Thisparameter isused to specifythe sliding speedof the ACCsliding windowin an accesscontrol policy.GUI ValueRange:15~7200Unit:sActual ValueRange:15~7200Default Value:120

ACCWSP BSC6910 ADDBSCACCCTRLPMODBSCACCCTRLP


Meaning:Thisparameter isused to specifythe sliding speedof the ACCsliding windowin an accesscontrol policy.GUI ValueRange:15~7200Unit:sActual ValueRange:15~7200Default Value:120



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7 Counters

There are no specific counters associated with this feature.

GSM BSSAccess Control Feature Parameter Description 7 Counters


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8 Glossary

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

GSM BSSAccess Control Feature Parameter Description 8 Glossary


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9 Reference Documents

There are no specific reference documents associated with this feature.

GSM BSSAccess Control Feature Parameter Description 9 Reference Documents


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