adaptive transmission link blocking(gbss16.0_01)

GSM BSSGBSS16.0

Adaptive Transmission LinkBlocking Feature ParameterDescription

Issue 01Date 2014-04-30

HUAWEI TECHNOLOGIES CO., LTD.

Copyright Huawei Technologies Co., Ltd. 2014. 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.

The information in this document is subject to change without notice. Every effort has been made in thepreparation of this document to ensure accuracy of the contents, but all statements, information, andrecommendations in this document do not constitute a warranty of any kind, express or implied. Huawei Technologies Co., Ltd.Address: Huawei Industrial Base

Bantian, LonggangShenzhen 518129People's Republic of China

Website: http://www.huawei.comEmail: [email protected]

Issue 01 (2014-04-30) Huawei Proprietary and ConfidentialCopyright Huawei Technologies Co., Ltd.

i

Contents

1 About This Document..................................................................................................................11.1 Scope..............................................................................................................................................................................11.2 Intended Audience..........................................................................................................................................................11.3 Change History...............................................................................................................................................................12 Overview.........................................................................................................................................32.1 Introduction....................................................................................................................................................................32.2 NEs Supporting the Feature............................................................................................................................................33 Technical Description...................................................................................................................44 Related Features.............................................................................................................................65 Network Impact.............................................................................................................................75.1 System Capacity.............................................................................................................................................................75.2 Network Performance.....................................................................................................................................................76 Engineering Guidelines...............................................................................................................86.1 When to Use Adaptive Transmission Link Blocking.....................................................................................................86.2 Required Information.....................................................................................................................................................86.3 Planning..........................................................................................................................................................................86.4 Deploying Adaptive Transmission Link Blocking.........................................................................................................96.4.1 Deployment Requirements..........................................................................................................................................96.4.2 Precautions.................................................................................................................................................................106.4.3 Activation..................................................................................................................................................................106.4.4 Activation Observation..............................................................................................................................................116.4.5 Deactivation...............................................................................................................................................................126.5 Performance Optimization............................................................................................................................................136.6 Troubleshooting............................................................................................................................................................137 Parameters.....................................................................................................................................148 Counters........................................................................................................................................299 Glossary.........................................................................................................................................3010 Reference Documents...............................................................................................................31

GSM BSSAdaptive Transmission Link Blocking Feature ParameterDescription Contents


ii

1 About This Document1.1 Scope

This document describes GBFD-113729 Adaptive Transmission Link Blocking, including itstechnical principles, related features, network impact, and engineering guidelines.

1.2 Intended AudienceThis document is intended for personnel who:l Need to understand the features described hereinl Work with Huawei products

1.3 Change HistoryThis section provides information about the changes in different document versions. There aretwo types of changes, which are defined as follows:l Feature change

Changes in features of a specific product versionl Editorial change

Changes in wording or addition of information that was not described in the earlier version

01 (2014-04-30)This issue does not include any changes.

Draft A (2014-01-23)Compared with Issue 01 (2013-05-06) of GBSS15.0, Draft A (2014-01-23) of GBSS16.0includes the following changes.

GSM BSSAdaptive Transmission Link Blocking Feature ParameterDescription 1 About This Document


1

Change Type Change Description Parameter ChangeFeature change Updated descriptions about

the support of batchparameter modification usingthe CME.Changed the name of Huaweimobile element managementsystem from M2000 toU2000.

None

Editorial change None None

GSM BSSAdaptive Transmission Link Blocking Feature ParameterDescription 1 About This Document


2

2 Overview2.1 Introduction

The Adaptive Transmission Link Blocking feature enables the base station controller (BSC) toautomatically perform the following operations:l Block an E1 link over the Abis interface when the transmission quality on the E1 link

becomes poor.l Unblock the E1 link when the transmission quality becomes normal.

This feature prevents calls from being carried on E1 links with poor transmission qualityand therefore ensures service quality.

2.2 NEs Supporting the FeatureTable 2-1 NEs supporting the feature

Feature BSC6900 BSC6910 GBTS eGBTSAdaptiveTransmissionLink Blocking

NOTE

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

GSM BSSAdaptive Transmission Link Blocking Feature ParameterDescription 2 Overview


3

3 Technical DescriptionOn a GSM network that uses TDM transmission, the transmission quality, especially the qualityof microwave transmission, is vulnerable to bad weather such as raining. When the transmissionquality of an E1/T1 link deteriorates, the quality of services carried on the link decreases andthe call drop rate increases.The BSC monitors the transmission quality of an E1/T1 link according to the bit error rate (BER)of E1/T1 frames in real time. As shown in Figure 3-1, the BSC and base transceiver station(BTS) periodically check the BER of frames carried on each E1/T1 link over the Abis interfaceon the uplink and downlink respectively. When the BSC or BTS detects that the BER of a linkexceeds the specified threshold, the BSC isolates the link. That is, the BSC releases all voiceand data services carried on the link so that new services will not be carried on the link.

Figure 3-1 Transmission quality monitoring on the Abis interface

If the BERAUTOISOSW(BSC6900,BSC6910) parameter is set to ON(ON), the BSCperiodically checks whether the BER of any link exceeds the threshold specified by theBERAUTOISOTHRD(BSC6900,BSC6910) parameter. It automatically isolates any link whoseBER exceeds the threshold. After a link is isolated, the BSC periodically checks whether theBER of the link becomes normal. When the BER of the link becomes lower than the threshold,the BSC allows the link to carry services again.If the BEROOSSwitch(BSC6900,BSC6910) parameter is set to ON(ON), the BTS checkswhether the BER of any link exceeds the threshold specified by BEROOSTHD

GSM BSSAdaptive Transmission Link Blocking Feature ParameterDescription 3 Technical Description


4

(BSC6900,BSC6910) at an interval specified by MONPER(BSC6900,BSC6910). When theBTS detects and reports that the BER of a link exceeds the threshold, the BSC isolates the link.After a link is isolated, the BTS checks whether BER of the link becomes normal at an intervalspecified by RESTOREPER(BSC6900,BSC6910). When the BER of the link becomes lowerthan the threshold, the BSC allows the link to carry services again.

GSM BSSAdaptive Transmission Link Blocking Feature ParameterDescription 3 Technical Description


5

4 Related FeaturesTable 4-1 Related features

Feature PrerequisiteFeature

MutuallyExclusive Feature

Impacted Feature

AdaptiveTransmission LinkBlocking

None l GBFD-118601Abis over IP

l GBFD-118611Abis IP over E1/T1

None

GSM BSSAdaptive Transmission Link Blocking Feature ParameterDescription 4 Related Features


6

5 Network Impact5.1 System Capacity

In the case of high BER, the Adaptive Transmission Link Blocking feature automatically blockstransmission links. This decreases transmission bandwidth and the network access success ratefor mobile stations (MSs).In the case of low BER, this feature does not block transmission links, and therefore has noimpact on the system capacity.

5.2 Network PerformanceIn the case of high BER, this feature automatically blocks transmission links. This guaranteesthe QoS of transmission links and improves user experience.

GSM BSSAdaptive Transmission Link Blocking Feature ParameterDescription 5 Network Impact


7

6 Engineering Guidelines6.1 When to Use Adaptive Transmission Link Blocking

During microwave transmission, the BER fluctuates in the case of bad weather. Therefore, it isrecommended that the Adaptive Transmission Link Blocking feature be used if the Abis interfaceuses microwave transmission on the backhaul network.The BER fluctuates slightly when the SDH network uses E1/T1 or STM-1 transmission.Therefore, it is recommended that this feature not be used if the SDH network uses E1/T1 orSTM-1 transmission.

6.2 Required InformationBefore deploying the Adaptive Transmission Link Blocking feature, collect the followinginformation:l Whether the Abis interface uses microwave transmissionl Range of BER fluctuation in the live networkIt is recommended that this feature be used if the Abis interface uses microwave transmission.Before setting the BER-based link blocking and unlocking thresholds, obtain information aboutthe range of BER fluctuation in the live network and the impact on ongoing services.

6.3 PlanningRF Planning

None

Network PlanningNone

GSM BSSAdaptive Transmission Link Blocking Feature ParameterDescription 6 Engineering Guidelines


8

Hardware PlanningConfigure board supporting TDM transmission on the BSC.

6.4 Deploying Adaptive Transmission Link Blocking6.4.1 Deployment Requirements

Table 6-1 Deployment requirementsAspect RequirementRelated features See chapter 4 Related Features.BSC The BSC6900 is configured with any of the

following boards that support TDMtransmission.l POUcl OIUal EIUal OIUbl EIUbThe BSC6910 is configured with a POUcboard that supports TDM transmission.

BTS For the GBTS, only 3900 series base stationsexcept BTS3900B and BTS3900E supportsthe Adaptive Transmission Link Blockingfeature.

GSM networking The Abis interface uses TDM transmission.MS NoneMSC NoneLicense The license controlling this feature has been

activated. For details on how to activate thelicense, see License Management FeatureParameter Description. For details aboutlicense items, see License Control ItemDescription.

Others None



9

6.4.2 PrecautionsIf the BER of an E1 link exceeds the specified threshold after the Adaptive Transmission LinkBlocking feature is enabled, new services cannot access the network using the E1 link, andongoing services on this link will be automatically released.

6.4.3 ActivationUsing MML Commands

On the BSC LMT, perform the following steps:Step 1 Run the SET E1T1 command with High BER Auto Isolation Switch set to ON(ON) and High

BER Auto Isolation Threshold set to O1E3_R5E4(OCCUR:1E-3, RECOVERY:5E-4) forthe POUc, OIUa, EIUa, OIUb, or EIUb board.

Step 2 Run the SET BTSE1T1BER command with BER OOS Switch set to ON(ON) and BER OOSThreshold set to O1E3_R5E4(OCCUR:1E3, RECOVERY:5E4).

NOTESet High BER Auto Isolation Threshold and BER OOS Threshold based on site requirements. Thesettings in Step 1 and Step 2 are used as examples for the verification procedure.

----End

MML Command Examples//Configuring High BER Auto Isolation Switch and High BER Auto Isolation Threshold on theBSC sideSET E1T1: SRN=0, SN=14, BT=POUc, PS= SINGLE, PN=3, BERAUTOISOSW=ON,BERAUTOISOTHRD=O1E3_R5E4;//Configuring BER OOS Switch and BER OOS Threshold on the BTS sideSET BTSE1T1BER: IDTYPE=BYID, BTSID=1, BEROOSSwitch=ON,BEROOSTHD=O1E3_R5E4;

Using the CMENOTE

When configuring the Adaptive Transmission Link Blocking feature on the CME, you must perform asingle configuration 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 6-2. For the method of performing the CME single configuration, see CMESingle 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 of



10

performing batch modifications through the CME batch modification center, press F1 on thewizard interface to obtain online help.----End

Table 6-2 Configuring parameters on the CMESN Managed

Object(MO)

NE ParameterName

ParameterID

Configurable in CMEBatchModification Center

1 E1T1 BSC6900/BSC6910

High BERAutoIsolationSwitch

BERAUTOISOSW

No

High BERAutoIsolationThreshold

BERAUTOISOTHRD

2 BTSE1T1BER

BSC6900/BSC6910

BER OOSSwitch

BEROOSSwitch

Yes

BER OOSThreshold

BEROOSTHD

6.4.4 Activation ObservationStep 1 On the BSC LMT, run the LST E1T1 command to query the values of High BER Auto Isolation

Switch and High BER Auto Isolation Threshold.Expected result: The value of High BER Auto Isolation Switch is ON and the value of HighBER Auto Isolation Threshold is consistent with that configured in the activation procedure.

Step 2 Run the LST BTSE1T1BER command to query the values of BER OOS Switch and BEROOS Threshold.Expected result: The value of BER OOS Switch is ON and the value of BER OOSThreshold is consistent with that configured in the activation procedure.

Step 3 Use an MS to perform CS services. Check the BER.Expected result: The BER is higher than 1E-3.

Step 4 On the BSC LMT or U2000, observe the alarms reported in real time.Expected result:l The BSC reports ALM-21207 E1/T1 Excessive Bit Error Rate if an electrical interface board

is used or ALM-21291 SDH/SONET Tributary Excessive Bit Error Rate if an optical



11

interface board is used. The cause value in the alarm is "BER within one minute exceeds theallowed limit." Ongoing services are interrupted 10 seconds after the alarm is reported.

l The BTS reports ALM-25806 E1/T1 Excessive Bit Error Rate. Ongoing services areinterrupted 10 seconds after the alarm is reported.

----End

6.4.5 DeactivationUsing MML Commands

On the BSC LMT, perform the following steps:

Step 1 Run the SET E1T1 command with High BER Auto Isolation Switch set to OFF(OFF).Step 2 Run the SET BTSE1T1BER command with BER OOS Switch set to OFF(OFF).

----End

MML Command Examples//Disabling High BER Auto Isolation Switch on the BSC sideSET E1T1: SRN=0, SN=14, BT=POUc, PS=SINGLE, PN=3, BERAUTOISOSW=OFF;//Disabling BER OOS Switch on the BTS sideSET BTSE1T1BER: IDTYPE=BYID, BTSID=1, BEROOSSwitch=OFF;

Using the CMENOTE

When configuring the Adaptive Transmission Link Blocking feature on the CME, you must perform asingle configuration 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 6-3. For the method of performing the CME single configuration, see CMESingle 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



12

Table 6-3 Configuring parameters on the CMESN MO NE Parameter

NameParameterID

Configurable in CMEBatchModification Center

1 E1T1 BSC6900/BSC6910

High BERAutoIsolationSwitch

BERAUTOISOSW

No

2 BTSE1T1BER

BSC6900/BSC6910

BER OOSSwitch

BEROOSSwitch

Yes

6.5 Performance OptimizationNone

6.6 TroubleshootingLinks may be blocked and unblocked frequently because of inappropriate thresholds and BERfluctuation. As a result, MSs may fail to camp on the network frequently. When this occurs, setthe BER blocking threshold to a larger value and the BER unblocking threshold to a smallervalue based on the impact of high BER on services.



13

7 ParametersTable 7-1 Parameter description

Parameter ID NE MMLCommand

Feature ID Feature Name Description

BERAUTOISOSW

BSC6900 SET E1T1 GBFD-113729 AdaptiveTransmissionLink Blocking

Meaning:Aswitch forautomaticallyreleasing theservices carriedon an E1/T1 portwhen the BER ofthe E1/T1 portexceeds thetrigger thresholdof "High BERAuto IsolationThreshold".When thisparameter is setto "ON", thefunction ofautomaticisolation due tohigh BER on E1/T1 ports isenabled. Whenthis parameter isset to "OFF", thefunction ofautomaticisolation due tohigh BER on E1/T1 ports isdisabled.

GSM BSSAdaptive Transmission Link Blocking Feature ParameterDescription 7 Parameters


14



GUI ValueRange:OFF(OFF), ON(ON)Unit:NoneActual ValueRange:OFF, ONDefaultValue:OFF(OFF)



15



BERAUTOISOSW


Meaning:Aswitch forautomaticallyreleasing theservices carriedon an E1/T1 portwhen the BER ofthe E1/T1 portexceeds thetrigger thresholdof "High BERAuto IsolationThreshold".When thisparameter is setto "ON", thefunction ofautomaticisolation due tohigh BER on E1/T1 ports isenabled. Whenthis parameter isset to "OFF", thefunction ofautomaticisolation due tohigh BER on E1/T1 ports isdisabled.GUI ValueRange:OFF(OFF), ON(ON)Unit:NoneActual ValueRange:OFF, ONDefaultValue:OFF(OFF)



16



BERAUTOISOTHRD


Meaning:Trigger threshold andrestore thresholdof automaticisolation due tohigh BER on E1/T1 ports. Whenthe BER of anE1/T1 portexceeds thetriggerthreshold, thesystemautomaticallyreleases theservices carriedon the E1/T1port and forbidsthe services toaccess to the E1/T1 port. Thesystem starts toallocate servicesto the E1/T1 portonly after theBER is lowerthan the restorethreshold.GUI ValueRange:O1E3_R5E4(OCCUR:1E-3,RECOVERY:5E-4),O1E3_R1E4(OCCUR:1E-3,RECOVERY:1E-4),O1E3_R5E5(OCCUR:1E-3,RECOVERY:5E-5),O1E3_R1E5(OCCUR:1E-3,RECOVERY:1E-5),O5E4_R1E5



17



(OCCUR:5E-4,RECOVERY:1E-5),O5E4_R5E6(OCCUR:5E-4,RECOVERY:5E-6),O5E4_R1E6(OCCUR:5E-4,RECOVERY:1E-6),O1E4_R5E5(OCCUR:1E-4,RECOVERY:5E-5),O1E4_R1E5(OCCUR:1E-4,RECOVERY:1E-5),O1E4_R5E6(OCCUR:1E-4,RECOVERY:5E-6)Unit:NoneActual ValueRange:O1E3_R5E4,O1E3_R1E4,O1E3_R5E5,O1E3_R1E5,O5E4_R1E5,O5E4_R5E6,O5E4_R1E6,O1E4_R5E5,O1E4_R1E5,O1E4_R5E6DefaultValue:O1E3_R1E4(OCCUR:1E-3,RECOVERY:1E-4)



18



BERAUTOISOTHRD


Meaning:Trigger threshold andrestore thresholdof automaticisolation due tohigh BER on E1/T1 ports. Whenthe BER of anE1/T1 portexceeds thetriggerthreshold, thesystemautomaticallyreleases theservices carriedon the E1/T1port and forbidsthe services toaccess to the E1/T1 port. Thesystem starts toallocate servicesto the E1/T1 portonly after theBER is lowerthan the restorethreshold.GUI ValueRange:O1E3_R5E4(OCCUR:1E-3,RECOVERY:5E-4),O1E3_R1E4(OCCUR:1E-3,RECOVERY:1E-4),O1E3_R5E5(OCCUR:1E-3,RECOVERY:5E-5),O1E3_R1E5(OCCUR:1E-3,RECOVERY:1E-5),O5E4_R1E5



19



(OCCUR:5E-4,RECOVERY:1E-5),O5E4_R5E6(OCCUR:5E-4,RECOVERY:5E-6),O5E4_R1E6(OCCUR:5E-4,RECOVERY:1E-6),O1E4_R5E5(OCCUR:1E-4,RECOVERY:5E-5),O1E4_R1E5(OCCUR:1E-4,RECOVERY:1E-5),O1E4_R5E6(OCCUR:1E-4,RECOVERY:5E-6)Unit:NoneActual ValueRange:O1E3_R5E4,O1E3_R1E4,O1E3_R5E5,O1E3_R1E5,O5E4_R1E5,O5E4_R5E6,O5E4_R1E6,O1E4_R5E5,O1E4_R1E5,O1E4_R5E6DefaultValue:O1E3_R1E4(OCCUR:1E-3,RECOVERY:1E-4)



20



BEROOSSwitch

BSC6900 SETBTSE1T1BER

GBFD-113729 AdaptiveTransmissionLink Blocking

Meaning:Switchforautomaticallyblocking an E1/T1 when the E1/T1 BER exceedsits threshold.This parametercan beconfigured onlywhen the BTStransmissionmode is TDM.This parameteris used to controlwhether theservices carriedby the E1/T1quit because ofthe E1/T1 BER.GUI ValueRange:ON(ON), OFF(OFF)Unit:NoneActual ValueRange:ON, OFFDefaultValue:OFF(OFF)



21



BEROOSSwitch



Meaning:Switchforautomaticallyblocking an E1/T1 when the E1/T1 BER exceedsits threshold.This parametercan beconfigured onlywhen the BTStransmissionmode is TDM.This parameteris used to controlwhether theservices carriedby the E1/T1quit because ofthe E1/T1 BER.GUI ValueRange:ON(ON), OFF(OFF)Unit:NoneActual ValueRange:ON, OFFDefaultValue:OFF(OFF)



22



BEROOSTHD BSC6900 SETBTSE1T1BER


Meaning:Threshold for the E1/T1BER. If the E1/T1 BER exceedsthe value of thisparameter, thisE1/T1 isblocked.GUI ValueRange:O1E3_R5E4(OCCUR:1E3,RECOVERY:5E4),O1E3_R1E4(OCCUR:1E3,RECOVERY:1E4),O1E3_R5E5(OCCUR:1E3,RECOVERY:5E5),O1E3_R1E5(OCCUR:1E3,RECOVERY:1E5),O5E4_R1E5(OCCUR:5E4,RECOVERY:1E5),O5E4_R5E6(OCCUR:5E4,RECOVERY:5E6),O5E4_R1E6(OCCUR:5E4,RECOVERY:1E6),O1E4_R5E5(OCCUR:1E4,RECOVERY:5E5),O1E4_R1E5(OCCUR:1E4,RECOVERY:1E5),O1E4_R5E6



23



(OCCUR:1E4,RECOVERY:5E6)Unit:NoneActual ValueRange:O1E3_R5E4,O1E3_R1E4,O1E3_R5E5,O1E3_R1E5,O5E4_R1E5,O5E4_R5E6,O5E4_R1E6,O1E4_R5E5,O1E4_R1E5,O1E4_R5E6DefaultValue:O1E3_R1E4(OCCUR:1E3,RECOVERY:1E4)



24



BEROOSTHD BSC6910 SETBTSE1T1BER


Meaning:Threshold for the E1/T1BER. If the E1/T1 BER exceedsthe value of thisparameter, thisE1/T1 isblocked.GUI ValueRange:O1E3_R5E4(OCCUR:1E3,RECOVERY:5E4),O1E3_R1E4(OCCUR:1E3,RECOVERY:1E4),O1E3_R5E5(OCCUR:1E3,RECOVERY:5E5),O1E3_R1E5(OCCUR:1E3,RECOVERY:1E5),O5E4_R1E5(OCCUR:5E4,RECOVERY:1E5),O5E4_R5E6(OCCUR:5E4,RECOVERY:5E6),O5E4_R1E6(OCCUR:5E4,RECOVERY:1E6),O1E4_R5E5(OCCUR:1E4,RECOVERY:5E5),O1E4_R1E5(OCCUR:1E4,RECOVERY:1E5),O1E4_R5E6



25



(OCCUR:1E4,RECOVERY:5E6)Unit:NoneActual ValueRange:O1E3_R5E4,O1E3_R1E4,O1E3_R5E5,O1E3_R1E5,O5E4_R1E5,O5E4_R5E6,O5E4_R1E6,O1E4_R5E5,O1E4_R1E5,O1E4_R5E6DefaultValue:O1E3_R1E4(OCCUR:1E3,RECOVERY:1E4)

MONPER BSC6900 SETBTSE1T1BER


Meaning:If biterror rateexceeds the linkblock threshold(set by the "BEROOS Threshold"parameter)during theMonitor period,the systemblocks the E1/T1 link and theE1/T1 link quitsservices.GUI ValueRange:1~5Unit:minActual ValueRange:1~5Default Value:1



26



MONPER BSC6910 SETBTSE1T1BER


Meaning:If biterror rateexceeds the linkblock threshold(set by the "BEROOS Threshold"parameter)during theMonitor period,the systemblocks the E1/T1 link and theE1/T1 link quitsservices.GUI ValueRange:1~5Unit:minActual ValueRange:1~5Default Value:1

RESTOREPER



Meaning:If biterror rate islower than thelink recoverythreshold (set bythe "BER OOSThreshold"parameter)during theRestore Monitorperiod, thesystem unblocksthe E1/T1 linkand the servicescarried by theE1/T1 linkrestores.GUI ValueRange:1~30Unit:minActual ValueRange:1~30Default Value:2



27



RESTOREPER



Meaning:If biterror rate islower than thelink recoverythreshold (set bythe "BER OOSThreshold"parameter)during theRestore Monitorperiod, thesystem unblocksthe E1/T1 linkand the servicescarried by theE1/T1 linkrestores.GUI ValueRange:1~30Unit:minActual ValueRange:1~30Default Value:2



28

8 CountersThere are no specific counters associated with this feature.

GSM BSSAdaptive Transmission Link Blocking Feature ParameterDescription 8 Counters


29

9 GlossaryFor the acronyms, abbreviations, terms, and definitions, see Glossary.

GSM BSSAdaptive Transmission Link Blocking Feature ParameterDescription 9 Glossary


30

10 Reference DocumentsThere are no specific reference documents associated with this feature.

GSM BSSAdaptive Transmission Link Blocking Feature ParameterDescription 10 Reference Documents


31

Contents1 About This Document1.1 Scope1.2 Intended Audience1.3 Change History

2 Overview2.1 Introduction2.2 NEs Supporting the Feature

3 Technical Description4 Related Features5 Network Impact5.1 System Capacity5.2 Network Performance

6 Engineering Guidelines6.1 When to Use Adaptive Transmission Link Blocking6.2 Required Information6.3 Planning6.4 Deploying Adaptive Transmission Link Blocking6.4.1 Deployment Requirements6.4.2 Precautions6.4.3 Activation6.4.4 Activation Observation6.4.5 Deactivation

6.5 Performance Optimization6.6 Troubleshooting

7 Parameters8 Counters9 Glossary10 Reference Documents

adaptive transmission link blocking(gbss16.0_01)

Documents

huawei trademarks

huawei proprietary

huawei industrial basebantian

thepurchase scope

usage scope

related features

gsm bssgbss16

trade names