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  Delta Cluster_25 Network Drive Test and Optimization

Page 1 of 13

2011 2011

Airtel Delta (cluster 25 Ugo) Network Drive Test

And

Optimization Report

HUAWEI TECHNOLOGIES LIMITED

April 2011

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  Delta Cluster_25 Network Drive Test and Optimization

Contents

1 Preface ...........................................................................................................3

2 Analysis of Drive Test in Delta Cluster_25 ................................................ 4

2.1 Network Summary ...........................................................................................4

2.1.1 The Radio Environment......................................................................................... 4

2.1.2 The List of tested sites ...........................................................................................4

2.2 Statistic of Drive Test.......................................................................................5

2.2.1 Delta Cluster_25 Drive Test RxLev Statistics and Distribution ..............................5

2.3 Delta Cluster_25 Drive Test RxQual Statistics and Distribution .......................8

2.4 Delta Drive Test events and Distribution ........................................................10

2G CALL STATISTICS .......................................................................................13

3 Conclusion ..................................................................................................13

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  Delta Cluster_25 Network Drive Test and Optimization

1 Preface

This article describes the Swap sites pre-drive test on Delta Cluster_25 coverage area

conducted on April, 2011.

This article includes the result of drive test in Delta Cluster_25.

One phone is used for the test making a repetitive short call of 45seconds.

Key word

Pre-Drive test, Delta Cluster_25.

S/N NAME POSITION EMAIL MOBILE NO1 Njoku Gregory I. RF Engineer   njokugregory@gmail.com 08033393960

DRIVE TEST EQUIPMENT SETUP

S/N EQUIPMENT

1 TEMS Investigation9.1.1

2 1 TEMS Test MobileZ750i

3 DELL Laptop D8304 USB GPS

5 Power Inverter  

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  Delta Cluster_25 Network Drive Test and Optimization

2Analysis of Drive Test in Delta Cluster_25

2.1 Network Summary

2.1.1 The Radio Environment

Figure1a. Distribution of the sites in Delta Cluster_25

2.1.2 The List of tested sites

S/No Site name Longitude Latitude BSC_name

1 DL0009 5.4608889 6.0011111 MDLBS30

2 DL0013 5.7382194 5.9716944 MDLBS30

3 DL0018 5.6902466 5.9959723 MDLBS29

4 DL0019 5.5507541 5.970332 MDLBS30

5 DL0065 5.6616649 5.8888871 MDLBS30

6 DL0067 5.6477736 5.9162221 MDLBS30

7 DL0068 5.6818036 5.8996645 MDLBS30

8 DL0069 5.6815846 5.8894758 MDLBS30

9 DL0211 5.6599146 5.9355589 MDLBS30

10 DL0241 5.6347694 5.89725 MDLBS30

Figure1b. List of tested sites

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2.2 Statistic of Drive Test

2.2.1 Delta Cluster_25 Drive Test RxLev Statistics and Distribution

Figure2. Delta Cluster_25 RxLev Distribution of Drive Test

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  Delta Cluster_25 Network Drive Test and Optimization

Figure2a. Delta Cluster_25 Rxlev Histogram of Drive Test

Figure2b. Delta Cluster_25 Rxlev Statistic of Drive Test

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Received Level(dBm)

Samples Percentage Cumulative

-120 to -94 31394 26.43% 26.43%

-94 to -85 35026 29.48% 55.91%

-85 to -60 47516 39.99% 95.90%

-60 to -10 48714.10%

100.00%

Figure2c. Delta Cluster_25 Rxlev Proportion of Drive Test

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2.3 Delta Cluster_25 Drive Test RxQual Statistics and Distribution

Figure3. Delta Cluster_25 RxQual Distribution of Drive Test

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Figure 3a. Delta Cluster_25 RxQual Histogram of Drive Test

Figure3b. Delta Cluster_25 RxQual Statistic of Drive Test

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  Delta Cluster_25 Network Drive Test and Optimization

Received Quality Samples Percentage Cumulative

0 to 3 76926 67.77% 67.77%3 to 5 10244 9.03% 76.80%

5 to 6 7084 6.24% 83.04%

6 to 7 19255 16.96% 100.00%

Figure 3c. Delta Cluster_25 Rxlev Proportion of Drive Test

2.4 Delta Drive Test events and Distribution

The events during the drive test are shown in the map below.

Figure 3d. Delta Cluster_25 Blocked Call

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  Delta Cluster_25 Network Drive Test and Optimization

Figure 3e. Delta Cluster_25 Handover Failure

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Figure 3f  Delta Cluster_25 Dropped Call

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2G CALL STATISTICS

3 Conclusion

From the Drive Test analysis it can be concluded that the Dropped call, Handover failures,

 blocked calls and signal strength, quality within Delta Cluster_25 need to be improved. Solving

 poor coverage issues in some of the areas drive tested will help to solve some of these

 problems.

It is necessary to carry out optimization after the swap.

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CALL STATISTIC PRE-DT

Mean Rx Level (dBm) -85.60

Mean Rx Quality (0-7) 1.74

2G Call Performance  

Call Attempt 82

Attempt Failure 12

Attempt Failure Rate 14.63%

Call Setup Success Rate 85.36%

HO Attempt 66

HO Failure 1

HO Failure Rate 1.52%HO Success 65

HO Success Rate 98.48%

Call Drop 9

Call Drop Rate 12.86%

Call Retainability 87.14%