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Delta Cluster_25 Network Drive Test and Optimization
Page 1 of 13
2011 2011
Airtel Delta (cluster 25) 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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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 [email protected] 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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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 MDLBS303 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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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 4871 4.10% 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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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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Figure 3e.Delta Cluster_25 Handover Failure
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Figure 3fDelta 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%