Um Adaptive Interference Suppression(GBSS15.0_01)

GSM BSS GBSS15.0

Um Adaptive Interference Suppression 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:

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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 Um Adaptive Interference Suppression 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.........................................................................................................................................2 2.1 Introduction....................................................................................................................................................................2 2.2 Benefits...........................................................................................................................................................................2 2.3 NEs Supporting the Feature............................................................................................................................................3

3 Technical Description...................................................................................................................4 4 Related Features.............................................................................................................................6 5 Network Impact.............................................................................................................................7 5.1 System Capacity.............................................................................................................................................................7 5.2 Network Performance.....................................................................................................................................................7

6 Engineering Guidelines...............................................................................................................8 6.1 When to Use Um Adaptive Interference Suppression....................................................................................................8 6.2 Required Information.....................................................................................................................................................8 6.3 Planning..........................................................................................................................................................................8 6.3.1 RF Planning.................................................................................................................................................................8 6.3.2 Network Planning........................................................................................................................................................8 6.3.3 Hardware Planning......................................................................................................................................................9 6.4 Deploying Um Adaptive Interference Suppression........................................................................................................9 6.4.1 Deployment Requirements..........................................................................................................................................9 6.4.2 Data Preparation..........................................................................................................................................................9 6.4.3 Activation..................................................................................................................................................................10 6.4.4 Activation Observation..............................................................................................................................................11 6.4.5 Deactivation...............................................................................................................................................................11 6.5 Performance Monitoring...............................................................................................................................................13 6.6 Parameter Optimization................................................................................................................................................13 6.7 Troubleshooting............................................................................................................................................................14

7 Parameters.....................................................................................................................................15 Issue 01 (2013-05-06)


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Contents

8 Counters........................................................................................................................................19 9 Glossary.........................................................................................................................................21 10 Reference Documents...............................................................................................................22

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1

1 About This Document

About This Document

1.1 Scope This document describes GBFD-119510 Um Adaptive Interference Suppression, including its technical principles, related features, network impact, and engineering guidelines.

1.2 Intended Audience This document is intended for personnel who: l

Need to understand the features described herein

l

Work with Huawei 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 Changes in features of a specific product version

l

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

01 (2013-05-06) This issue does not include any changes.

Draft A (2013-02-27) This document is created for GBSS15.0.

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2 Overview

2

Overview

2.1 Introduction The Um Adaptive Interference Suppression feature enables the BTS to detect Um interface interference characteristics on each timeslot used by MSs. Based on the detection result, the BTS selects an optimal interference suppression method to minimize the interference in various scenarios. This protects wanted signals if possible and improves the anti-interference capability of the network. This feature also provides an enhanced interference suppression algorithm for CS services. With this algorithm, the BTS filters the synchronization position on a timeslot used by an MS. This improves the network anti-interference capability and uplink receive quality. This feature applies to the tight frequency reuse pattern.

2.2 Benefits Network interference increases when refarming technology is used in a tight frequency reuse pattern. Therefore, to further enhance the uplink anti-interference capability and improve the uplink receive quality, the Um Adaptive Interference Suppression feature works with the interference counteract combine (ICC) and enhanced interference counteract combine (EICC) features. The Um Adaptive Interference Suppression feature provides the following benefits: l

Improves the uplink anti-interference capability during refarming.

l

Improves the uplink receive quality for CS services. – Further improves the uplink receive quality by working with the ICC and EICC features. – Decreases the proportion of uplink receive quality level 6 and uplink receive quality level 7 by 5% to 13% when the following conditions are met: A tight frequency reuse pattern is used. The proportion of left and right adjacent-channel interfering frames is greater than 25%. The proportion of uplink receive quality level 6 and uplink receive quality level 7 accounts for more than 2% of all the uplink receive quality levels.

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2 Overview

The EICC is enabled. l

Increases uplink data upload rates for PS services.

2.3 NEs Supporting the Feature Table 2-1 NEs supporting the feature Feature

BSC6900

BSC6910

GBTS

eGBTS

Um Adaptive Interference Suppression

√

√

√

√

NOTE

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

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3

3 Technical Description

Technical Description

Figure 3-1 shows the working principles of the Um Adaptive Interference Suppression feature. Figure 3-1 Working principles of Um Adaptive Interference Suppression

The Um Adaptive Interference Suppression feature consists of the following: 1.

Interference characteristics detection The BTS detects interference characteristics in the received signals on each timeslot to identify the interference type, such as adjacent-channel interference, co-channel interference, multi-source interference, or noises.

2.

Adaptive interference suppression Based on the interference type, the BTS selects an optimal interference suppression algorithm for each timeslot used by MSs.

3.

Enhanced interference suppression Interference changes the detected synchronization position of a timeslot. For CS services, the BTS uses the enhanced interference suppression algorithm to filter the synchronization position of the neighboring timeslots used by the same MS. This increases the stability of the synchronization position and network anti-interference capability.

Um Adaptive Interference Suppression is controlled by the following parameters: l

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UmAisSwitch(BSC6900,BSC6910): This parameter is mandatory. This feature is enabled only when this parameter is set to ON(On). When this happens, the BTS can perform 1 and 2.


4


l

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3 Technical Description

EnUmAisSwitch(BSC6900,BSC6910): This parameter is optional. If this parameter is set to ON(On), the BTS uses the enhanced interference suppression algorithm to suppress interference for CS services. When this happens, the BTS can perform 1, 2, and 3.


5


4 Related Features

4

Related Features

Table 4-1 Related features Feature

Prerequis ite Feature

Mutually Exclusive Feature

Impacted Feature


None

None

l This feature does not take effect on access burst (AB) if it is used with the GBFD-118201 SoftSynchronized Network feature or the GBFD-114001 Extended Cell feature. l Enhanced interference suppression does not take effect if used with the GBFD-115830 VAMOS feature.

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5 Network Impact

5

Network Impact

5.1 System Capacity The uplink throughput for PS services increases.

5.2 Network Performance For details, see 2.2 Benefits.

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6

6 Engineering Guidelines

Engineering Guidelines

6.1 When to Use Um Adaptive Interference Suppression This feature applies to the tight frequency reuse pattern where the proportion of left and right adjacent-channel interfering frames is greater than 25%. Enabling this feature brings benefits for scenarios that have strong network interference. It is recommended that this feature be used in scenarios where the proportion of uplink receive quality levels 6 and 7 is 2% or higher. If the proportion of uplink receive quality levels 6 and 7 is less than 2%, the voice quality on the existing network is good and enabling this feature cannot bring significant gains.

6.2 Required Information Calculate the proportion of left and right adjacent-channel interfering frames using the following formula: Proportion of left and right adjacent-channel interfering frames = (TRX.LEFT.ADJINTERFMEAS.FRAME.CNT + TRX.RIGHT.ADJINTERFMEAS.FRAME.CNT)/ (TRX.LEFT.ADJINTERFMEAS.FRAME.CNT + TRX.RIGHT.ADJINTERFMEAS.FRAME.CNT + TRX.NONSINGLE.ADJINTERFMEAS.FRAME.CNT) x 100%

6.3 Planning 6.3.1 RF Planning N/A

6.3.2 Network Planning N/A Issue 01 (2013-05-06)


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6.3.3 Hardware Planning l

BTS: 3900 series base stations (excluding BTS3900B and BTS3900E)

l

Radio frequency (RF) modules: This feature is supported by the RRU3928, RRU3929, RRU3926, RRU3942, RRU3936, RRU3938, MRFUd, and MRFUe.

6.4 Deploying Um Adaptive Interference Suppression 6.4.1 Deployment Requirements Table 6-1 Deployment requirements Aspect

Description

Related features

See 4 Related Features.

BSC

None

BTS

See 6.3.3 Hardware Planning.

GSM networking

None

MS

None

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

6.4.2 Data Preparation Table 6-2 lists the data to be prepared before deploying Um Adaptive Interference Suppression. Table 6-2 Data preparation

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Parameter Name

Parameter ID

NE

Setting Notes

Data Source

Um Adaptive Interference Suppression Switch

UmAisSwitch (BSC6900, BSC6910)

BSC6900/ BSC6910

Set this parameter to ON (On) if required.

Network plan


9



Parameter Name

Parameter ID

NE

Setting Notes

Data Source

Enhanced Um Adaptive Interference Suppression Switch

EnUmAisSwitch (BSC6900, BSC6910)

BSC6900/ BSC6910

Set this parameter to ON (On) if required.

Network plan

This parameter is configurable only when Um Adaptive Interference Suppression Switch is set to ON(On).

6.4.3 Activation Using MML Commands On the BSC LMT, perform the following steps: Step 1 Run the SET GCELLBASICPARA command with Um Adaptive Interference Suppression Switch set to ON(On). Step 2 (Optional) To perform enhanced interference suppression, run the SET GCELLBASICPARA command with Um Adaptive Interference Suppression Switch set to ON(On) and Enhanced Um Adaptive Interference Suppression Switch set to ON(On). ----End

MML Command Examples SET GCELLBASICPARA: IDTYPE=BYID, CELLID=0, UmAisSwitch=ON; SET GCELLBASICPARA: IDTYPE=BYID, CELLID=0, UmAisSwitch=ON, EnUmAisSwitch=ON;

Using the CME NOTE

When configuring the Um Adaptive Interference Suppression 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 6-3. For the method of performing the CME single configuration, see 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 Issue 01 (2013-05-06)


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performing batch modifications through the CME batch modification center, press F1 on the wizard interface to obtain online help. ----End Table 6-3 Configuring parameters on the CME SN

Managed Object (MO)

NE

Parameter Name

Parameter ID

Configura ble in CME Batch Modificati on Center

1

GCELLBASICPARA

BSC6900/ BSC6910


UmAisSwitc h

Yes

2

GCELLBASICPARA

BSC6900/ BSC6910


UmAisSwitc h

Yes

BSC6900/ BSC6910


EnUmAisSw itch

NOTE Configure this parameter only if enhanced interference suppression is required.

6.4.4 Activation Observation On the M2000, obtain the measured values of counters related to the uplink receive quality before and after this feature is enabled. After this feature is enabled, the proportion of uplink receive quality levels 6 and 7 decreases; that is, the low quality indicator (LQI) decreases.

6.4.5 Deactivation Using MML Commands On the BSC LMT, perform the following steps: Step 1 Run the SET GCELLBASICPARA command to deactivate enhanced interference suppression. In this step, set Um Adaptive Interference Suppression Switch to ON(On) and Enhanced Um Adaptive Interference Suppression Switch to OFF(Off). Step 2 Run the SET GCELLBASICPARA command to deactivate adaptive interference suppression. In this step, set Um Adaptive Interference Suppression Switch to OFF(Off). ----End Issue 01 (2013-05-06)


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MML Command Examples SET GCELLBASICPARA: IDTYPE=BYID, CELLID=0, UmAisSwitch=ON, EnUmAisSwitch=OFF; SET GCELLBASICPARA: IDTYPE=BYID, CELLID=0, UmAisSwitch=OFF;

Using the CME NOTE

When configuring the Um Adaptive Interference Suppression 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 6-4. For the method of performing the CME single configuration, see 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 Table 6-4 Configuring parameters on the CME SN

MO

NE

Parameter Name

Parameter ID

Configurab le in CME Batch Modificatio n Center

1

GCELLBASICPARA

BSC6900 / BSC6910


UmAisSwit ch

Yes

BSC6900 / BSC6910


EnUmAisS witch

BSC6900 / BSC6910


UmAisSwit ch

2

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GCELLBASICPARA


Yes

12



6.5 Performance Monitoring To determine whether the network performance needs to be optimized after Um Adaptive Interference Suppression is enabled, monitor the counters related to the following:

Uplink Receive Quality l

Counters: – TRX.FR.UP.RX.QLTY.0.AVR (CS410A:Number of MRs on Uplink TCHF (Mean Receive Quality Rank 0)) - TRX.FR.UP.RX.QLTY.7.AVR (CS417A:Number of MRs on Uplink TCHF (Mean Receive Quality Rank 7)) – TRX.HR.UP.RX.QLTY.0.AVR (CS410C:Number of MRs on Uplink TCHH (Mean Rank of Receive Quality 0)) - TRX.HR.UP.RX.QLTY.7.AVR (CS417C:Number of MRs on Uplink TCHH (Mean Receive Quality Rank 7))

l

KPIs: Rx_QUALITY(UPLINK)

PS Service Uplink Rate and Uplink Throughput l

Counters: – TX.UP.GPRS.LLC.PDU.THRPUT.RATE.AVG (AL9425:Uplink Throughput of GPRS Users LLC PDU) – TX.UP.EGPRS.LLC.PDU.THRPUT.RATE.AVG (AL9426:Uplink Throughput of EGPRS Users LLC PDU) – UP.GPRS.RLC.AVG.THRPUT.RATE (TL9014:Average Throughput of Uplink GPRS RLC) – UP.EGPRS.RLC.AVG.THRPUT.RATE (TL9232:Average Throughput of Uplink EGPRS RLC) – TX.UP.GPRS.LLC.PDU.THRPUT.RATE (L9422:Throughput of Uplink GPRS Users LLC PDU) – TX.UP.EGPRS.LLC.PDU.THRPUT.RATE (L9424:Throughput of Uplink EGPRS Users LLC PDU) – LLC.UP.THRPUT.RATE (TL9406:Uplink LLC Throughput Rate)

l

KPIs: – Average Throughput of Uplink GPRS RLC per PDCH (kbit/s) – Average Throughput of Uplink EGPRS RLC per PDCH (kbit/s) – Average Throughput of Uplink GPRS RLC per Cell (kbit/s) – Average Throughput of Uplink EGPRS RLC per Cell (kbit/s) – Average Throughput of Uplink GPRS RLC per User (kbit/s) – Average Throughput of Uplink EGPRS RLC per User (kbit/s)

6.6 Parameter Optimization N/A Issue 01 (2013-05-06)


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6.7 Troubleshooting N/A

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7 Parameters

7

Parameters

Table 7-1 GSM: Parameter description Parameter ID

NE

MML Command

Feature ID

Feature Name

Description

UmAisSwitch

BSC6900

SET GCELLBASIC PARA

GBFD-119510


Meaning:Wheth er to enable the Um Adaptive Interference Suppression function. If this parameter is set to ON, Um Adaptive Interference Suppression is enabled, and the BSC preprocesses interference over the Um interface based on the interference characteristics. If this parameter is set to OFF, Um Adaptive Interference Suppression is disabled. GUI Value Range:OFF (Off), ON(On) Unit:None

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Parameter ID

NE

MML Command

7 Parameters

Feature ID

Feature Name

Description Actual Value Range:OFF, ON Default Value:OFF(Off)

UmAisSwitch

BSC6910

SET GCELLBASIC PARA

GBFD-119510


Meaning:Wheth er to enable the Um Adaptive Interference Suppression function. If this parameter is set to ON, Um Adaptive Interference Suppression is enabled, and the BSC preprocesses interference over the Um interface based on the interference characteristics. If this parameter is set to OFF, Um Adaptive Interference Suppression is disabled. GUI Value Range:OFF (Off), ON(On) Unit:None Actual Value Range:OFF, ON Default Value:OFF(Off)

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7 Parameters

Parameter ID

NE

MML Command

Feature ID

Feature Name

Description

EnUmAisSwitc h

BSC6900

SET GCELLBASIC PARA

GBFD-119510


Meaning:Wheth er to enable the Enhanced Um Adaptive Interference Suppression function. If this parameter is set to ON, Enhanced Um Adaptive Interference Suppression is enabled, improving the reliability of points of synchronization for CS services. If this parameter is set to OFF, Enhanced Um Adaptive Interference Suppression is disabled. This parameter is valid only if "UmAisSwitch" is set to ON. GUI Value Range:OFF (Off), ON(On) Unit:None Actual Value Range:OFF, ON Default Value:OFF(Off)

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7 Parameters

Parameter ID

NE

MML Command

Feature ID

Feature Name

Description

EnUmAisSwitc h

BSC6910

SET GCELLBASIC PARA

GBFD-119510


Meaning:Wheth er to enable the Enhanced Um Adaptive Interference Suppression function. If this parameter is set to ON, Enhanced Um Adaptive Interference Suppression is enabled, improving the reliability of points of synchronization for CS services. If this parameter is set to OFF, Enhanced Um Adaptive Interference Suppression is disabled. This parameter is valid only if "UmAisSwitch" is set to ON. GUI Value Range:OFF (Off), ON(On) Unit:None Actual Value Range:OFF, ON Default Value:OFF(Off)

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8 Counters

8

Counters

Table 8-1 Counter description: GSM Counter ID

Counter Name

Counter Description

NE

Feature ID

Feature Name

1282433989

TRX.LEFT.AD JINTERFMEA S.FRAME.CNT

S420L:Number of Left AdjacentChannel Interfering Frames

BSC6900

GBFD-119510


1282433990

TRX.RIGHT.A DJINTERFME AS.FRAME.CN T

S420R:Number of Right AdjacentChannel Interfering Frames

BSC6900

GBFD-119510


1282434414

TRX.NONSIN GLE.ADJINTE RFMEAS.FRA ME.CNT

S420N:Number of Non-SingleSide AdjacentChannel Interfering Frames

BSC6900

GBFD-119510


1282433989

TRX.LEFT.AD JINTERFMEA S.FRAME.CNT

S420L:Number of Left AdjacentChannel Interfering Frames

BSC6910

GBFD-119510


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8 Counters

Counter ID

Counter Name

Counter Description

NE

Feature ID

Feature Name

1282433990

TRX.RIGHT.A DJINTERFME AS.FRAME.CN T

S420R:Number of Right AdjacentChannel Interfering Frames

BSC6910

GBFD-119510


1282434414

TRX.NONSIN GLE.ADJINTE RFMEAS.FRA ME.CNT

S420N:Number of Non-SingleSide AdjacentChannel Interfering Frames

BSC6910

GBFD-119510


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9 Glossary

9

Glossary

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

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10

10 Reference Documents

Reference Documents

None

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Um Adaptive Interference Suppression(GBSS15.0_01)

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