2-antenna receive diversity(gbss15.0_02)

8/9/2019 2-Antenna Receive Diversity(GBSS15.0_02)

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GSM BSS

GBSS15.0

2-Antenna Receive Diversity Feature

Parameter Description

Issue 02

Date 2013-11-15

HUAWEI TECHNOLOGIES CO., LTD.


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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 02 (2013-11-15) Huawei Proprietary and Confidential

Copyright Huawei Technologies Co., Ltd.

i
http://www.huawei.com/


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Contents

1 About This Document..................................................................................................................1

1.1 Scope..............................................................................................................................................................................1

1.2 Intended Audience..........................................................................................................................................................1

1.3 Change History...............................................................................................................................................................1

2 Overview.........................................................................................................................................4

2.1 Introduction....................................................................................................................................................................4

2.2 Benefits...........................................................................................................................................................................4

2.3 NEs Supporting the Feature............................................................................................................................................4

3 Technical Description...................................................................................................................6

3.1 Technical Principle.........................................................................................................................................................6

3.2 Diversity Combining Algorithms...................................................................................................................................7

3.2.1 MRC............................................................................................................................................................................7

3.2.2 ICC...............................................................................................................................................................................7

3.2.3 EICC............................................................................................................................................................................7

3.2.4 ADC.............................................................................................................................................................................8

4 Related Features.............................................................................................................................9

5 NetworkImpact...........................................................................................................................11

5.1 2-AntennaReceive Diversity........................................................................................................................................11

5.1.1 System Capacity........................................................................................................................................................11

5.1.2 Network Performance................................................................................................................................................11

5.2 MRC.............................................................................................................................................................................11

5.2.1 System Capacity........................................................................................................................................................11

5.2.2 NetworkPerformance................................................................................................................................................11

5.3 ICC................................................................................................................................................................................11

5.3.1 System Capacity........................................................................................................................................................12

5.3.2 NetworkPerformance................................................................................................................................................12

5.4 EICC.............................................................................................................................................................................12

5.4.1 System Capacity........................................................................................................................................................12


5.5 ADC..............................................................................................................................................................................12

5.5.1 System Capacity........................................................................................................................................................12

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6 Engineering Guidelines.............................................................................................................13

6.1 When to Use 2-Antenna Receive Diversity..................................................................................................................13

6.1.1 2-Antenna Receive Diversity.....................................................................................................................................136.1.2 MRC..........................................................................................................................................................................13

6.1.3 ICC.............................................................................................................................................................................13

6.1.4 EICC..........................................................................................................................................................................13

6.1.5 ADC...........................................................................................................................................................................15

6.2 Required Information...................................................................................................................................................15

6.3 Planning........................................................................................................................................................................16

6.4 Deploying 2-Antenna Receive Diversity (GBTS)........................................................................................................16

6.4.1 Deployment Requirements........................................................................................................................................16

6.4.2 Initial Configuration..................................................................................................................................................176.4.3 Activation Observation..............................................................................................................................................18

6.5 Deploying2-Antenna Receive Diversity (eGBTS)......................................................................................................19


6.5.2 Initial Configuration..................................................................................................................................................19

6.5.3 Activation Observation..............................................................................................................................................21

6.6 DeployingEICC...........................................................................................................................................................21


6.6.2 Activation..................................................................................................................................................................22

6.6.3 Activation Observation..............................................................................................................................................236.6.4 Deactivation...............................................................................................................................................................23

6.7 Performance Monitoring...............................................................................................................................................24

6.8 ParameterOptimization................................................................................................................................................24

6.9 Troubleshooting............................................................................................................................................................24

7 Parameters.....................................................................................................................................25

8 Counters........................................................................................................................................52

9 Glossary.........................................................................................................................................53

10 Reference Documents...............................................................................................................54

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1About This Document

1.1 Scope

This document describes 2-Antenna Receive Diversity, including its technical principles, related

features, network impact, and engineering guidelines.

This document covers the following features:

l GBFD-115821 EICC

l MRFD-210604 2-Antenna Receive Diversity

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 aretwo 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

02 (2013-11-15)

This issue includes the following changes.

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Change Type Change Description ParameterChange

Feature change Added descriptions about settingADAICFLAG

(BSC6900,BSC6910)andADAICADFLAG(BSC6900,BSC6910)to ON(On)when you

enable the ICC or EICC algorithm in the following

contents:

3.2.4 ADC

6.1.5 ADC

6.2 Required Information

6.6.2 Activation

None

Editorial change Optimized the 3.1 Technical Principlesection. Added the

following

parameters:

l RCVMD

(BSC6900,

BSC6910,

eGBTS)

l SndRcvMode

(BSC6900,

BSC6910)

l SndRcvMode1

(BSC6900,

BSC6910)l SndRcvMode2

(BSC6900,

BSC6910)

l SndRcvMode3

(BSC6900,

BSC6910)

l ANTNUM

l ANTTYPE1

l ANTTYPE2

l ANTTYPE3

l ANTTYPE4

l ANTTYPE5

l ANTTYPE6

l ANTTYPE7

l ANTTYPE8

01 (2013-05-06)

This issue includes the following changes.

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Feature change None None

Editorial change l Added descriptions about the method for

selecting an application scenario in 6.1.4

EICC.

l Updated 4 Related Features.

l Optimized the following contents:

6.4.3 Activation Observation



None

Draft A (2013-02-27)

Compared with Issue 02 (2012-08-30) of GBSS14.0, Draft A (2013-02-27) of GBSS15.0

includes the following changes.


Feature change l Added descriptions about the eGBTS.

l Added 2.3 NEs Supporting the Feature.

None

Editorial change Optimized 6 Engineering Guidelines. None

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2Overview

2.1 Introduction

In a wireless communications system, multipath propagation is the phenomenon that results in

radio signals reaching the receiving antenna by two or more paths. Multipath propagation causes

the amplitude, phase, and angle of receive (RX) signals to fluctuate, which is known as multipath

fading. It deteriorates the quality of RX signals.

As one of the technologies applied to counteract multipath fading, the diversity technology in

the GSM system consists of time diversity, frequency diversity, and space diversity. With space

diversity, two or more antennas are used at the RX end to receive signals from the same source.

The RX signals are then processed and combined to minimize the impact of multipath fading.

This document describes the technology that enables a BTS to use two antennas (or two

polarization ends of the same polarization antenna) to receive signals from the same source. The

technology is implemented by the 2-Antenna Receive Diversity feature.

2.2 Benefits

The 2-Antenna Receive Diversity feature improves uplink receive quality, receiver sensitivity,

and uplink coverage for BTSs. As this feature does not require additional hardware installation

or algorithm implementation, it reduces the capital expenditure (CAPEX) for telecom operators.

2.3 NEs Supporting the Feature

Table 2-1NEs supporting the feature

Feature BSC6900 BSC6910 GBTS eGBTS

2-Antenna Receive Diversity

EICC

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NOTE

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

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3Technical Description

3.1 Technical Principle

The 2-antenna receive diversity technique combines the signals received from the two diverse

antennas at the receiving end to mitigate multipath interference. Figure 3-1shows the working

principle of 2-antenna receive diversity.

Figure 3-1Working principle of 2-antenna receive diversity

As shown in Figure 3-1:

1. The signal x(k) arrives at the diverse antennas through two RX channels. The two RX

signals are identified as r1(k) and r2(k). After the superimposition of interference and noise,

the two RX signals are identified as S1(k) and S2(k).

2. Based on the maximum signal-to-noise ratio criterion, the adaptive combining coefficients

W1 and W2 are calculated and the output signal is obtained through the formula: y(k) =

W1 x S1(k) + W2 x S2(k).

The combining algorithms consist of the MRC, ICC, and EICC. In Figure 3-1the two RX

channels correspond to the main and diversity RX channels of the TRX.

The 2-Antenna Receive Diversity feature is enabled by settingRCVMD

(BSC6900,BSC6910,eGBTS)to MAINDIVERSITY(Main Diversity)and configuring two

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receive antennas for each related device. When you configure receive antennas, ensure that the

following conditions are met:

l For a GBTS, the connection mode between RF modules and antennas is set to the two-way

receive mode by settingSndRcvMode(BSC6900,BSC6910),SndRcvMode1

(BSC6900,BSC6910),SndRcvMode2(BSC6900,BSC6910), andSndRcvMode3

(BSC6900,BSC6910). Additionally, the connection mode of antennas is consistent with

the actual connections.

l For an eGBTS, two receive antennas are configured by settingANTNUM. The send and

receive mode of the two receive antennas is set to RX_MODE(RX)by setting

ANTTYPE1andANTTYPE2.

NOTE

When the value ofANTNUM(the maximum value is 8) is greater than 2, set all the following

parameters for each antenna:ANTTYPE1,ANTTYPE2,ANTTYPE3,ANTTYPE4,ANTTYPE5,

ANTTYPE6,ANTTYPE7, andANTTYPE8.

3.2 Diversity Combining Algorithms

3.2.1 MRC

MRC performs weighted combining on the two signals received by the BTS based on their

respective signal-to-noise ratios. This combining method is ideal for situations with little

interference and limited noise. It is applicable to wide coverage, such as over sea coverage.

To enable the MRC algorithm of 2-antenna receive diversity, setICTYP(BSC6900,BSC6910)

toMRC(MRC).

3.2.2 ICC

ICC is a multi-antenna combining technique developed from MRC. In tight frequency reuse

scenarios the interfering signals received at diverse antennas may come from the same interfering

source. Therefore, a certain correlation exists among these interfering signals. ICC uses this

correlation when combining the signals of the two antennas to eliminate certain interference.

The use of ICC can improve the speech quality and data throughput in situations with strong

interference, for example, the network where tight frequency reuse is in place. ICC can suppress

the interference within the GSM system and from other systems if correlation exists between

the interfering signals received on diverse antennas.

To enable the ICC algorithm of 2-antenna receive diversity, setICTYP(BSC6900,BSC6910)

toICC(ICC).

A resource item license is required for enabling this algorithm.

3.2.3 EICC

The GBFD-115821 EICC feature is developed based on ICC. Generally, the interfering signals

received from multiple antennas are associated with co-channel interference (among antennas)

and intersymbol interference (ISI).

The difference between ICC and EICC is as follows:

ICC considers only space correlation to eliminate interference.

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EICC considers both space correlation and time correlation. In addition, EICC combines signals

by constructing the multidimensional combining coefficient matrix based on the maximum

signal noise ratio (SNR) criteria. This suppresses or even eliminates interference and helps

operators provide optimized uplink signals.

EICC is used in heavy traffic network where tight frequency reuse is in place and in situations

where a single interfering source exists. The EICC performs better than ICC.

The EICC feature requires the matrix of interference, which is calculated on the basis of the

training sequence of wanted signals. For each channel of RX signals, the network estimates a

channel model based on the training sequence of signals, reconstructs the wanted signals, and

subtracts the wanted signals from the RX signals to obtain the interfering signals. The network

then estimates the matrix of each interfering signal and analyzes the statistical dependency of

these interfering signals. Based on the statistical dependency, some interference is counteracted

during the combination of RX signals to maximize the combination gain.

SetSTIRCALLOWED(BSC6900,BSC6910)to YES(Yes)to select the EICC algorithm of 2-

antenna receive diversity.

This feature can be enabled only after you apply for a resource item license.

3.2.4 ADC

The adaptive diversity combining (ADC) algorithm checks whether an ongoing callis in the

interference-limited or noise-limited scenario.

l In the interference-limited scenario, the BTS uses ICC or EICC.

l In the noise-limited scenario, the BTS uses MRC.

The ADC algorithm achieves favorable network performance in noise-limited and interference-limited scenarios.

To enable the ADC algorithm, setADAICFLAG(BSC6900,BSC6910)to ON(On). In addition,

you can setADAICADFLAG(BSC6900,BSC6910)to ON(On)to improve the detection

accuracy in adaptive scenarios.

l When you enable the ICC or EICC algorithm, setADAICFLAG(BSC6900,BSC6910)and

ADAICADFLAG(BSC6900,BSC6910)to ON(On)so that the MRC, ICC, and EICC

algorithms can be widely applied. IfSTIRCALLOWED(BSC6900,BSC6910)is set to YES

(Yes), the ADC algorithm adaptively selects either EICC or MRC.

l IfSTIRCALLOWED(BSC6900,BSC6910)is set to NO(No)andICTYP

(BSC6900,BSC6910)is set to ICC(ICC), the ADC algorithm adaptively selects either ICCor MRC.

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4Related FeaturesTable 4-1Related features

Feature PrerequisiteFeature

MutuallyExclusive Feature

Impacted Feature

2-Antenna Receive

Diversity

None None None

MRC MRFD-210604 2-

Antenna Receive

Diversity or

GBFD-115903 4-

Way Receiver

Diversity

None None

ICC MRFD-210604 2-

Antenna Receive

Diversity or

GBFD-115903 4-

Way Receiver

Diversity

None It is recommended

that this feature be

used with the

GBFD-118201 Soft-

Synchronized

Network feature or

GBFD-510401 BTS

GPS Synchronization

feature.

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Feature PrerequisiteFeature

MutuallyExclusive Feature

Impacted Feature

EICC MRFD-210604 2-

Antenna ReceiveDiversity

GBFD-510101

AutomaticFrequency

Correction (AFC)

GBFD-510105 PS

AFC

NOTE

This feature is

disabled

automatically after the

GBFD-510101

Automatic Frequency

Correction (AFC)

feature or theGBFD-510105 PS

AFC feature is

enabled.

It is recommended

that this feature beused with the

GBFD-118201 Soft-

Synchronized

Network feature or

GBFD-510401 BTS

GPS Synchronization

feature.

Adaptive diversity

combination

MRFD-210604 2-

Antenna Receive

Diversity

None None

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5Network Impact

5.1 2-Antenna Receive Diversity

5.1.1 System Capacity

The 2-Antenna Receive Diversity feature improves uplink receive quality for BTSs by using the

MRC, ICC, EICC, and adaptive diversity combination algorithms.

This feature reduces the interference on the entire network and increases traffic when an MS

enables uplink power control during a CS service.

This feature increases the uplink PS throughput.

5.1.2 Network Performance

This feature improves uplink receive quality for BTSs.

5.2 MRC


This algorithm improves the uplink receive quality.

For CS services, after uplink power control is enabled for MSs, this algorithm decreases the

entire network interference and increases the traffic volume.

For PS services, this algorithm increases the uplink throughput.


This algorithm improves the uplink receive quality.

5.3 ICC

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Compared with the MRC algorithm, the ICC algorithm enhances the network anti-interference

capability and improves the uplink receive quality.





Compared with the MRC algorithm, the ICC algorithm enhances the network anti-interference


5.4 EICC


Compared with the ICC algorithm, the EICC algorithm enhances the network anti-interference






Compared with the ICC algorithm, the EICC algorithm enhances the network anti-interference


5.5 ADC


This algorithm can adaptively select an appropriate combining algorithm based on interferencescenarios on the live network. Compared with the fixed combining algorithm, this algorithm

further improves the network anti-interference capability and uplink receive quality.





This algorithm can adaptively select an appropriate combining algorithm based on interference

scenarios on the live network. Therefore, this algorithm enhances the network anti-interference


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6Engineering Guidelines

6.1 When to Use 2-Antenna Receive Diversity

6.1.1 2-Antenna Receive Diversity

Use this feature for outdoor BTSs.

6.1.2 MRC

Use the MRC algorithm in the following conditions:

l The live network is in noise-limited scenarios, for example, railway coverage or rural areacoverage.

l The licenses for the ICC and EICC algorithms have not been obtained.

6.1.3 ICC

Use the ICC algorithm in the following conditions:

l The live network is in interference-limited scenarios, for example, urban area coverage and

tight frequency reuse scenarios with strong interference.

l The license for the EICC algorithm has not been obtained.

6.1.4 EICC

You are advised to use the EICC algorithm in interference-limited scenarios, such as city

coverage and tight frequency reuse scenarios with strong interference.

The method for selecting an application scenario is as follows:

1. Check whether it is a tight frequency reuse scenario or a densely populated urban scenario.

2. If 1is met, measure the counters in the function subsets "TCHF Receive Level Measurement

per TRX" and "TCHH Receive Level Measurement per TRX".

3. Collect the TRX-level uplink signal traffic statistics obtained in 2into a two-dimensional

table to form cell-level measurement data, as shown in Figure 6-1. The formula is as

follows:

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l Number of times reporting good receive quality

l Number of times reporting weak coverage

l Number of times reporting weak interference

l Number of times reporting strong interference

Figure 6-1RxLev-RxQual measurement data

NOTE

In Figure 6-1, RxQual represents the uplink receive quality, and RxLev represents the uplink receive

level.

4. Classify the cells according to the uplink high quality indicator (HQI), that is, the proportion

of RxQual levels 0 to 3, and the measurement data in Figure 6-1, as shown in Table 6-1.

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Table 6-1Cell classification

Cell Type Conditions

Strong

interference

l HQI < 96%

l Number of times reporting strong interference + Number of times

reporting weak interference Number of times reporting weak

coverage

l Proportion of the number of times reporting strong interference

2%

Weak

interference

l HQI < 96%



coverage

l Proportion of the number of times reporting strong interference

2%

Weak coverage l HQI < 96%



coverage

Good receive

quality

HQI 96%

The preceding cells with strong and weak interference are all cells where severe interference

is identified. It is recommended that the EICC feature be enabled in these cells.

6.1.5 ADC

When you enable the ICC or EICC algorithm, enable the ADC algorithm so that the MRC, ICC,

and EICC algorithms can be widely applied. That is, setADAICFLAG(BSC6900,BSC6910)

andADAICADFLAG(BSC6900,BSC6910)to ON(On).

6.2 Required InformationBefore deploying this feature, collect the following information:

l Whether the cell is configured in 2-antenna receive mode

l Frequency planning data

l Cell coverage range

l Traffic volume on the network

l Whether there is interference in the radio environment

The MRC algorithm improves the network performance at the coverage edge when:

l The cell is configured in 2-antenna receive mode.

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l The network frequencies are loosely set.

l The cell coverage is relatively large.

The ICC and EICC algorithms improve the network anti-interference capability when:

l The cell is configured in 2-antenna receive mode.

l The network frequencies are tightly set.

l The network interference is strong and traffic is heavy.

If interference or noises occur on the network, the ICC or EICC algorithm improves network

performance only when both of the following conditions are met:

l The ICC or EICC algorithm is enabled.

l ADAICFLAG(BSC6900,BSC6910)andADAICADFLAG(BSC6900,BSC6910)are set to

ON(On).

These four algorithms are not applicable to cells in one-antenna receive mode.

6.3 Planning

RF Planning

N/A

Network Planning

N/A

Hardware Planning

The two RX channels of a TRX board must be connected to two antennas or a dual-polarized

antenna.

6.4 Deploying 2-Antenna Receive Diversity (GBTS)

6.4.1 Deployment Requirements

Table 6-2Deployment requirements

Aspect Requirement

Related features See 4 Related Features.

BSC None

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Aspect Requirement

BTS l The DATM is required for the BTS3006C and BTS3002E to support

this feature.

l The DATU is required for the BTS3012 and BTS3012AE to supportthis feature.

l The GATM is required for the BTS3900, BTS3900A, BTS3900L,

and BTS3900AL (DRFU) to support this feature.

GSM networking None

MS None

MSC None

License None

Others None

6.4.2 Initial Configuration

Using MML Commands

Step 1 On the BSC LMT, run the SET BTSRXUBPcommand with the send and receive mode set tothe two-way receive mode for RF boards.

NOTE

The send and receive mode varies depending on the type and quantity of RF boards. It can be set to

SGLDOUBLE_ANTENNA(Single Feeder[1TX + 2RX]), DOUBLE_ANTENNA(Double Feeder

[2TX + 2RX]), or DOUBLEDOUBLE_ANTENNA(Double Feeder[1TX + 2RX]).

Step 2 Run the SET GTRXDEV command with Receive Modeset to MAINDIVERSITY(MainDiversity).

----End

MML Command Examples

SET BTSRXUBP: IDTYPE=BYID, BTSID=153, RXUIDTYPE=SRNSN, CN=0, SRN=4,SN=0, RXUTYPE=DRFU, SndRcvMode1=DOUBLE_ANTENNA;

SET GTRXDEV: IDTYPE=BYID, TRXID=0, RCVMD=MAINDIVERSITY;

Using the CME

NOTE

When configuring the 2-Antenna Receive Diversityfeature 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)

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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)

To modify objects, such as BSCs, BTSs, cells, and TRXs, in batches, click the icon on the

CME configuration interface to start the batch modification wizard. For the method of

performing batch modifications through the CME batch modification center, press F1on the

wizard interface to obtain online help.

----End

Table 6-3Configuring the parameter on the CME

SN ManagedObject(MO)

NE Parameter Name ParameterID

Configurable in CMEBatchModification Center

1 BTSRXUBP BSC6900/

BSC6910

DRRU Sending

Receiving Mode

SndRcvMode No

BSC6900/

BSC6910

DRFU Sending

Receiving Mode

SndRcvMode

1

BSC6900/

BSC6910

MRRU/GRRU

Sending ReceivingMode

SndRcvMode

2

BSC6900/

BSC6910

MRFU/GRFU

Sending Receiving

Mode

SndRcvMode

3

BSC6900/

BSC6910

BTS3900E Sending

Receiving Mode

SndRcvMode

4

2 GTRXDEV BSC6900/

BSC6910

Receive Mode RCVMD Yes


Step 1 Run the SET BTSRXUBPcommand with the send and receive mode set to the single-wayreceive mode for RF boards.

Step 2 Record the counters related to uplink receive quality in the "Receive Quality Measurement perTRX" function subset. Calculate the percentage of the number of MRs on the uplink (mean

receive quality rank 0).

Percentage of the number of MRs on the uplink (mean receive quality rank 0) =

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Step 3 On the BSC LMT, run the SET BTSRXUBPcommand with the send and receive mode set tothe two-way receive mode for RF boards.

Step 4 Run the SET GTRXDEV command with Receive Modeset to MAINDIVERSITY(MainDiversity).

Step 5 Repeat Step 2.

Step 6 Compare the measured two percentages.

Expected result: The percentage in Step 5is higher than that in Step 2.

----End

6.5 Deploying 2-Antenna Receive Diversity (eGBTS)



Aspect Requirement


BSC None

BTS None

GSM networking None

MS None

MSC None

License None

Others None

6.5.2 Initial Configuration

Using MML Commands

Step 1 On the BTS LMT, run the ADD SECTOREQMcommand. In this step, set AntennaNumberto 2and set Antenna RX/TX Modefor the two antennas to RXTX_MODE(RX And

TX)and RX_MODE(RX), respectively.

Step 2 Run the ADD GTRXGROUPcommand with Receiving Modeset to MAINDIVERSITY(Main Diversity).

----End

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ADD SECTOREQM: SECTOREQMID=0, SECTORID=0, ANTNUM=2, ANT1CN=0,

ANT1SRN=60, ANT1SN=0, ANT1N=R0A, ANTTYPE1=RXTX_MODE, ANT2CN=0,

ANT2SRN=60, ANT2SN=0, ANT2N=R0B, ANTTYPE2=RX_MODE;

ADD GTRXGROUP: GTRXGROUPID=0,GLOCELLID=0, RCVMD= MAINDIVERSITY;

Using the CME

NOTE

When configuring the 2-Antenna Receive Diversityfeature 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.










----End


SN MO NE Parameter Name Parameter ID Configurable in CMEBatchModification Center

1 SECTOREQM eGBTS Antenna Number ANTNUM Yes

eGBTS Antenna 1 RX/TXMode ANTTYPE1

eGBTS Antenna 2 RX/TX

Mode

ANTTYPE2

2 GTrxGroup eGBTS Receiving Mode RCVMD Yes

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Step 1 On the BTS LMT, run the ADD SECTOREQMcommand. In this step, set AntennaNumberto 2and set Antenna RX/TX Modeto RX_MODE(RX)for one antenna and to

TX_MODE(TX)for the other.

Step 2 Record the counters related to uplink receive quality in the "Receive Quality Measurement perTRX" function subset. Calculate the percentage of the number of MRs on the uplink (mean

receive quality rank 0).


Step 3 On the BTS LMT, run the ADD SECTOREQMcommand. In this step, set Antenna

Numberto2and set Antenna RX/TX Modefor the two antennas to RXTX_MODE(RX AndTX) and RX_MODE(RX), respectively.

Step 4 Run the ADD GTRXGROUPcommand with Receiving Modeset to MAINDIVERSITY(Main Diversity).

Step 5 Repeat Step 2.

Step 6 Compare the measured two percentages.

Expected result: The percentage in Step 5is higher than that in Step 2.

----End

6.6 Deploying EICC



Aspect Requirement


BSC None

BTS l The following BTSs do not support this feature: BTS3012 (QTRU),

BTS3012AE (QTRU), BTS3900E, and BTS3900B.

l RRU3008 V1 and RRU3908 V1 that are configured with more than

four carriers do not support this feature.

GSM networking None

MS None

MSC None

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Aspect Requirement

License The license controlling this feature has been activated. For details on how

to activate the license, seeLicense Management Feature Parameter

Description. For details about license items, seeLicense Control ItemDescription.

Others None

6.6.2 Activation

Using MML Commands

On the BSC LMT, run the SET GCELLSOFTcommand with its parameters set as follows:

l Set EICC Allowedto YES(Yes).

l Set Interference Cancel Mode Adaptationto ON(On).

l Set Enhanced Interference Cancel Mode Adaptationto ON(On).


SET GCELLSOFT: IDTYPE=BYID, CELLID=0, STIRCALLOWED=YES,

ADAICFLAG=ON, ADAICADFLAG=ON;

Using the CME

NOTE

When configuring the EICC 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.



described in Table 6-7. For the method of performing the CME single configuration, see CMESingle Configuration Operation Guide.






----End

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SN MO NE ParameterName

Parameter ID Configurablein CME BatchModificationCenter

1 GCELLSOFT BSC6900/

BSC6910

EICC Allowed STIRCALLOW

ED

Yes

Interference

Cancel Mode

Adaptation

ADAICFLAG

Enhanced

Interference

Cancel Mode

Adaptation

ADAICADFL

AG


Step 1 Use an MS to load files using FTP on a live network affected by interference, and observe theupload speed. If the EICC feature is enabled, the upload speed improves. If the EICC feature is

disabled, the upload speed reduces.

Step 2 Use an MS to initiate a call on a live network affected by interference. Record the counters

related to uplink receive quality in the "Receive Quality Measurement per TRX" function subset.Calculate the percentage of the number of MRs on the uplink (mean receive quality rank 0).


If the EICC feature is enabled, the percentage is high, indicating that the conversation quality is

good. If the EICC feature is disabled, the percentage is low, indicating that the conversation

quality is poor.

----End

6.6.4 Deactivation

Using MML Commands

On the BSC LMT, run the SET GCELLSOFTcommand with EICC Allowedset to NO

(No).


SET GCELLSOFT: IDTYPE=BYID, CELLID=0, STIRCALLOWED=NO;

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Using the CME

NOTE

When configuring the EICC 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.






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



----End


SN MO NE ParameterName

Parameter ID Configurablein CME BatchModification

Center

1 GCELLSOFT BSC6900/

BSC6910

EICC

Allowed

STIRCALLOWED Yes

6.7 Performance Monitoring

Observe the Uplink Quality (UL RxQual) counter for CS services. If the counter remains

unchanged or even deteriorates after the 2-Antenna Receive Diversity feature is enabled, use

another diversity combination algorithm instead.

6.8 Parameter Optimization

None

6.9 Troubleshooting

None

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7ParametersTable 7-1GSM: Parameter description

Parameter ID NE MMLCommand

Feature ID Feature Name Description

ADAICFLAG BSC6900 SET

GCELLSOFT

GBFD-115821

GBFD-115801

EICC

ICC

Meaning:Wheth

er to adaptively

select the

interference

cancellation

mode. If this

parameter is set

to ON, the BSC

adaptively

selects the

interference

cancellation

mode. If this

parameter is set

to OFF, the BSC

always selects

the fixed

interference

cancellation

mode.

GUI Value

Range:OFF

(Off), ON(On)

Unit:None

Actual Value

Range:OFF, ON

Default

Value:OFF(Off)

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ADAICFLAG BSC6910 SET

GCELLSOFT

GBFD-115821

GBFD-115801

EICC

ICC

Meaning:Wheth

er to adaptivelyselect the

interference

cancellation

mode. If this

parameter is set

to ON, the BSC

adaptively

selects the

interference

cancellation

mode. If this

parameter is set

to OFF, the BSC

always selects

the fixed

interference

cancellation

mode.

GUI Value

Range:OFF

(Off), ON(On)

Unit:None

Actual Value

Range:OFF, ON

Default

Value:OFF(Off)

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ADAICADFL

AG

BSC6900 SET

GCELLSOFT

MRFD-210604

GBFD-115801

2-Antenna

ReceiveDiversity

ICC

Meaning:Wheth

er to enable theadaptive

interference

cancellation

enhancement

function. If this

parameter is set

to ON, the

adaptive

interference

cancellation

enhancement

function is

enabled. If this

parameter is set

to OFF, the

adaptive

interference

cancellation

enhancement

function is not

enabled. It is

recommended

that thisparameter be set

to ON when

adaptive

interference

cancellation is

used.

GUI Value

Range:OFF

(Off), ON(On)

Unit:None

Actual Value

Range:OFF, ON

Default

Value:OFF(Off)

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ADAICADFL

AG

BSC6910 SET

GCELLSOFT

MRFD-210604

GBFD-115801

2-Antenna

ReceiveDiversity

ICC

Meaning:Wheth

er to enable theadaptive

interference

cancellation

enhancement

function. If this

parameter is set

to ON, the

adaptive

interference

cancellation

enhancement

function is

enabled. If this

parameter is set

to OFF, the

adaptive

interference

cancellation

enhancement

function is not

enabled. It is

recommended

that thisparameter be set

to ON when

adaptive

interference

cancellation is

used.

GUI Value

Range:OFF

(Off), ON(On)

Unit:None

Actual Value

Range:OFF, ON

Default

Value:OFF(Off)

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RCVMD BSC6900 SET

GTRXDEV

MRFD-210301

GBFD-115903

Configuration

Management4-Way Receiver

Diversity

Meaning:RF

receive mode ofthe TRX. The

BTS3012,

BTS3012AE,

BTS3012II,

BTS3006C, and

BTS3002E do

not support

Main Diversity.

The DBS3900

GSM and

BTS3900 GSM

support Four

Diversity

Receiver and

Main Diversity.

eGBTS do not

support this

parameter.

GUI Value

Range:INDEPE

NDENT

(Independent

Receiver),DIVIDING

(Dividing

Receiver),

FOURDIVERSI

TY(Four

Diversity

Receiver),

MAINDIVERSI

TY(Main

Diversity),

NONE(None)Unit:None

Actual Value

Range:INDEPE

NDENT,

DIVIDING,

FOURDIVERSI

TY,

MAINDIVERSI

TY, NONE

Default

Value:INDEPE

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NDENT

(IndependentReceiver)

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RCVMD BSC6910 SET

GTRXDEV

MRFD-210301

GBFD-115903

Configuration

Management4-Way Receiver

Diversity

Meaning:RF

receive mode ofthe TRX. The

BTS3012,

BTS3012AE,

BTS3012II,

BTS3006C, and

BTS3002E do

not support

Main Diversity.

The DBS3900

GSM and

BTS3900 GSM

support Four

Diversity

Receiver and

Main Diversity.

eGBTS do not

support this

parameter.

GUI Value

Range:INDEPE

NDENT

(Independent

Receiver),DIVIDING

(Dividing

Receiver),

FOURDIVERSI

TY(Four

Diversity

Receiver),

MAINDIVERSI

TY(Main

Diversity),

NONE(None)Unit:None

Actual Value

Range:INDEPE

NDENT,

DIVIDING,

FOURDIVERSI

TY,

MAINDIVERSI

TY, NONE

Default

Value:INDEPE

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NDENT

(IndependentReceiver)

RCVMD BTS3900 ADD

GTRXGROUP

MOD

GTRXGROUP

LST

GTRXGROUP

MRFD-210301

MRFD-210604

Configuration

Management

2-Antenna

Receive

Diversity

Meaning:Indi-

cates the

receiving mode

of the TRX

group.

GUI Value

Range:SINGLE

RECV(Single

Receiver),

MAINDIVERSITY(Main

Diversity)

Unit:None

Actual Value

Range:SINGLE

RECV,

MAINDIVERSI

TY

Default

Value:MAINDIVERSITY

(Main

Diversity)

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SndRcvMode BSC6900 SET

BTSRXUBP

GBFD-111202 O&M of BTS Meaning:The

connectionmode between

the DRRU and

the antenna.

GUI Value

Range:SGL_A

NTENNA

(Single Feeder

[1TX + 1RX]),

SGLDOUBLE_

ANTENNA

(Single Feeder

[1TX + 2RX]),

DOUBLE_ANT

ENNA(Double

Feeder[2TX +

2RX]),

DOUBLEFOU

R_ANTENNA

(Double Feeder

[2TX + 4RX]),

DOUBLESING

LE_ANTENNA

(Double Feeder[1TX + 1RX]),

DOUBLEDOU

BLE_ANTENN

A(Double

Feeder[1TX +

2RX])

Unit:None

Actual Value

Range:SGL_A

NTENNA,

SGLDOUBLE_

ANTENNA,

DOUBLE_ANT

ENNA,

DOUBLEFOU

R_ANTENNA,

DOUBLESING

LE_ANTENNA

,

DOUBLEDOU

BLE_ANTENN

A

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Default

Value:DOUBLE_ANTENNA

(Double Feeder

[2TX + 2RX])

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SndRcvMode BSC6910 SET

BTSRXUBP



the DRRU and

the antenna.

GUI Value

Range:SGL_A

NTENNA

(Single Feeder

[1TX + 1RX]),

SGLDOUBLE_

ANTENNA

(Single Feeder

[1TX + 2RX]),

DOUBLE_ANT

ENNA(Double

Feeder[2TX +

2RX]),

DOUBLEFOU

R_ANTENNA

(Double Feeder

[2TX + 4RX]),

DOUBLESING

LE_ANTENNA


DOUBLEDOU

BLE_ANTENN

A(Double

Feeder[1TX +

2RX])

Unit:None

Actual Value

Range:SGL_A

NTENNA,

SGLDOUBLE_

ANTENNA,

DOUBLE_ANT

ENNA,

DOUBLEFOU

R_ANTENNA,

DOUBLESING

LE_ANTENNA

,

DOUBLEDOU

BLE_ANTENN

A

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Default


(Double Feeder

[2TX + 2RX])

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SndRcvMode1 BSC6900 SET

BTSRXUBP



the DRFU and

the antenna.

GUI Value

Range:SGL_A

NTENNA

(Single Feeder

[1TX + 1RX]),

SGLDOUBLE_

ANTENNA

(Single Feeder

[1TX + 2RX]),

DOUBLE_ANT

ENNA(Double

Feeder[2TX +

2RX]),

DOUBLEFOU

R_ANTENNA

(Double Feeder

[2TX + 4RX]),

DOUBLESING

LE_ANTENNA


DOUBLEDOU

BLE_ANTENN

A(Double

Feeder[1TX +

2RX])

Unit:None

Actual Value

Range:SGL_A

NTENNA,

SGLDOUBLE_

ANTENNA,

DOUBLE_ANT

ENNA,

DOUBLEFOU

R_ANTENNA,

DOUBLESING

LE_ANTENNA

,

DOUBLEDOU

BLE_ANTENN

A

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Default


(Double Feeder

[2TX + 2RX])

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BTSRXUBP



the DRFU and

the antenna.

GUI Value

Range:SGL_A

NTENNA

(Single Feeder

[1TX + 1RX]),

SGLDOUBLE_

ANTENNA

(Single Feeder

[1TX + 2RX]),

DOUBLE_ANT

ENNA(Double

Feeder[2TX +

2RX]),

DOUBLEFOU

R_ANTENNA

(Double Feeder

[2TX + 4RX]),

DOUBLESING

LE_ANTENNA


DOUBLEDOU

BLE_ANTENN

A(Double

Feeder[1TX +

2RX])

Unit:None

Actual Value

Range:SGL_A

NTENNA,

SGLDOUBLE_

ANTENNA,

DOUBLE_ANT

ENNA,

DOUBLEFOU

R_ANTENNA,

DOUBLESING

LE_ANTENNA

,

DOUBLEDOU

BLE_ANTENN

A

GSM BSS




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BTSRXUBP



the MRRU/

GRRU and the

antenna.

GUI Value

Range:SGL_A

NTENNA

(Single Feeder

[1TX + 1RX]),

SGLDOUBLE_

ANTENNA

(Single Feeder

[1TX + 2RX]),

DOUBLE_ANT

ENNA(Double

Feeder[2TX +

2RX]),

DOUBLEFOU

R_ANTENNA

(Double Feeder

[2TX + 4RX]),

DOUBLESING

LE_ANTENNA(Double Feeder

[1TX + 1RX]),

DOUBLEDOU

BLE_ANTENN

A(Double

Feeder[1TX +

2RX]),

THREEDOUB

LEFOUR_ANT

ENNA(Three

Feeder[2TX +4RX]),

FOURDOUBL

E_ANTENNA

(Four Feeder

[2TX + 2RX]),

FOURDOUBL

EFOUR_ANTE

NNA(Four

Feeder[2TX +

4RX])

Unit:None

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Actual Value

Range:SGL_ANTENNA,

SGLDOUBLE_

ANTENNA,

DOUBLE_ANT

ENNA,

DOUBLEFOU

R_ANTENNA,

DOUBLESING

LE_ANTENNA

,

DOUBLEDOU

BLE_ANTENN

A,

THREEDOUB

LEFOUR_ANT

ENNA,

FOURDOUBL

E_ANTENNA,

FOURDOUBL

EFOUR_ANTE

NNA

Default


(Double Feeder

[2TX + 2RX])

GSM BSS




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BTSRXUBP



the MRRU/

GRRU and the

antenna.

GUI Value

Range:SGL_A

NTENNA

(Single Feeder

[1TX + 1RX]),

SGLDOUBLE_

ANTENNA

(Single Feeder

[1TX + 2RX]),

DOUBLE_ANT

ENNA(Double

Feeder[2TX +

2RX]),

DOUBLEFOU

R_ANTENNA

(Double Feeder

[2TX + 4RX]),

DOUBLESING


[1TX + 1RX]),

DOUBLEDOU

BLE_ANTENN

A(Double

Feeder[1TX +

2RX]),

THREEDOUB

LEFOUR_ANT

ENNA(Three

Feeder[2TX +4RX]),

FOURDOUBL

E_ANTENNA

(Four Feeder

[2TX + 2RX]),

FOURDOUBL

EFOUR_ANTE

NNA(Four

Feeder[2TX +

4RX])

Unit:None

GSM BSS




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Actual Value

Range:SGL_ANTENNA,

SGLDOUBLE_

ANTENNA,

DOUBLE_ANT

ENNA,

DOUBLEFOU

R_ANTENNA,

DOUBLESING

LE_ANTENNA

,

DOUBLEDOU

BLE_ANTENN

A,

THREEDOUB

LEFOUR_ANT

ENNA,

FOURDOUBL

E_ANTENNA,

FOURDOUBL

EFOUR_ANTE

NNA

Default


(Double Feeder

[2TX + 2RX])

GSM BSS




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BTSRXUBP



the MRFU/

GRFU and the

antenna.

GUI Value

Range:SGL_A

NTENNA

(Single Feeder

[1TX + 1RX]),

SGLDOUBLE_

ANTENNA

(Single Feeder

[1TX + 2RX]),

DOUBLE_ANT

ENNA(Double

Feeder[2TX +

2RX]),

DOUBLEFOU

R_ANTENNA

(Double Feeder

[2TX + 4RX]),

DOUBLESING


[1TX + 1RX]),

DOUBLEDOU

BLE_ANTENN

A(Double

Feeder[1TX +

2RX])

Unit:None

Actual Value

Range:SGL_A

NTENNA,

SGLDOUBLE_

ANTENNA,

DOUBLE_ANT

ENNA,

DOUBLEFOU

R_ANTENNA,

DOUBLESING

LE_ANTENNA

,

DOUBLEDOU

GSM BSS




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BLE_ANTENN

ADefault

Value:DOUBL

E_ANTENNA

(Double Feeder

[2TX + 2RX])

GSM BSS




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BTSRXUBP



the MRFU/

GRFU and the

antenna.

GUI Value

Range:SGL_A

NTENNA

(Single Feeder

[1TX + 1RX]),

SGLDOUBLE_

ANTENNA

(Single Feeder

[1TX + 2RX]),

DOUBLE_ANT

ENNA(Double

Feeder[2TX +

2RX]),

DOUBLEFOU

R_ANTENNA

(Double Feeder

[2TX + 4RX]),

DOUBLESING


[1TX + 1RX]),

DOUBLEDOU

BLE_ANTENN

A(Double

Feeder[1TX +

2RX])

Unit:None

Actual Value

Range:SGL_A

NTENNA,

SGLDOUBLE_

ANTENNA,

DOUBLE_ANT

ENNA,

DOUBLEFOU

R_ANTENNA,

DOUBLESING

LE_ANTENNA

,

DOUBLEDOU

GSM BSS




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BLE_ANTENN

ADefault

Value:DOUBL

E_ANTENNA

(Double Feeder

[2TX + 2RX])

ICTYP BSC6900 SET

GCELLSOFT

MRFD-210604

GBFD-115801

2-Antenna

Receive

Diversity

ICC

Meaning:Inter-

ference

cancellation

mode. When

tight frequency

reuse is used, itis recommended

that this

parameter be set

to ICC. When

noises are

restricted, it is

recommended

that this

parameter be set

to MRC.

GUI ValueRange:MRC

(MRC), ICC

(ICC)

Unit:None

Actual Value

Range:MRC,

ICC

Default

Value:MRC

(MRC)

GSM BSS




48
http://en/GSM/BSC6900/m-bsc-mml-go/mbsc/m-mml/set-gcellsoft.htmlhttp://en/GSM/BSC6900/m-bsc-mml-go/mbsc/m-mml/set-gcellsoft.htmlhttp://en/GSM/BSC6900/m-bsc-mml-go/mbsc/m-para/gcellsoft_ictyp.html


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ICTYP BSC6910 SET

GCELLSOFT

MRFD-210604

GBFD-115801

2-Antenna

ReceiveDiversity

ICC

Meaning:Inter-

ferencecancellation

mode. When

tight frequency

reuse is used, it

is recommended

that this

parameter be set

to ICC. When

noises are

restricted, it is

recommended

that this

parameter be set

to MRC.

GUI Value

Range:MRC

(MRC), ICC

(ICC)

Unit:None

Actual Value

Range:MRC,

ICCDefault

Value:MRC

(MRC)

GSM BSS




49
http://en/GSM/BSC6910/m-bsc-mml-go/mbsc/m-mml/set-gcellsoft.htmlhttp://en/GSM/BSC6910/m-bsc-mml-go/mbsc/m-mml/set-gcellsoft.htmlhttp://en/GSM/BSC6910/m-bsc-mml-go/mbsc/m-para/gcellsoft_ictyp.html


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STIRCALLO

WED

BSC6900 SET

GCELLSOFT

MRFD-210604 2-Antenna

ReceiveDiversity

Meaning:Wheth

er to enable theEICC algorithm.

Enhanced

Interference

Rejection

Combining

combines the

signals received

by multiple

antennas to

obtain better

signals. EICC is

mainly used in

heavy-traffic

network where

tight frequency

reuse is in place.

GUI Value

Range:NO(No),

YES(Yes)

Unit:None

Actual Value

Range:NO, YESDefault

Value:NO(No)

GSM BSS




50
http://en/GSM/BSC6900/m-bsc-mml-go/mbsc/m-mml/set-gcellsoft.htmlhttp://en/GSM/BSC6900/m-bsc-mml-go/mbsc/m-mml/set-gcellsoft.htmlhttp://en/GSM/BSC6900/m-bsc-mml-go/mbsc/m-para/gcellsoft_stircallowed.htmlhttp://en/GSM/BSC6900/m-bsc-mml-go/mbsc/m-para/gcellsoft_stircallowed.html


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STIRCALLO

WED

BSC6910 SET

GCELLSOFT

MRFD-210604 2-Antenna

ReceiveDiversity

Meaning:Wheth

er to enable theEICC algorithm.

Enhanced

Interference

Rejection

Combining

combines the

signals received

by multiple

antennas to

obtain better

signals. EICC is

mainly used in

heavy-traffic

network where

tight frequency

reuse is in place.

GUI Value

Range:NO(No),

YES(Yes)

Unit:None

Actual Value

Range:NO, YESDefault

Value:NO(No)

GSM BSS




51
http://en/GSM/BSC6910/m-bsc-mml-go/mbsc/m-mml/set-gcellsoft.htmlhttp://en/GSM/BSC6910/m-bsc-mml-go/mbsc/m-mml/set-gcellsoft.htmlhttp://en/GSM/BSC6910/m-bsc-mml-go/mbsc/m-para/gcellsoft_stircallowed.htmlhttp://en/GSM/BSC6910/m-bsc-mml-go/mbsc/m-para/gcellsoft_stircallowed.html


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8CountersGSM:There are no specific counters associated with this feature.

GSM BSS

2-Antenna Receive Diversity Feature Parameter Description 8 Counters



52


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

GSM BSS

2-Antenna Receive Diversity Feature Parameter Description 9 Glossary


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