GENEX NASTAR

MTN Nigeria MS Delivery Project Team Frank Jiaodongfeng Strong Jiangshiqiang Jason Xuguowang David Yujunwei 24th Jun 2013*
Network Topology
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Description of Nastar function modules:
Nastar: As one of multi-user telecommunication platforms of Huawei, the Nastar provides functions for analyzing performance of wireless networks, such as MR analysis, frequency analysis, neighboring cell analysis, and uplink interference analysis.
Huawei M2000: Huawei M2000 is a management platform provided by Huawei for managing mobile networks in a unified way. The M2000 can be used to perform functions such as centralized fault management, centralized performance management, centralized configuration management, centralized topology management, centralized security management, and system management. The M2000 is connected to the Nastar and provides performance data and configuration data for the Nastar in FTP mode.
HUAWEI TECHNOLOGIES CO., LTD.
Provides the management of VIP subscribers and periodic performance analysis.
Complaint Analysis Support
Provides the quick extraction of subscriber complaint information and analysis support for abnormality.
Provides the pilot pollution analysis.
Provides the service geographic observation.
Neighboring Cell Analysis
Cell Performance Analysis
Uplink Interference Analysis
Provides the analysis and identification of interfered frequency and the identification of interference sources.
Provides the performance analysis of terminals of each type in the network.
Pilot Pollution Analysis
Provides the analysis of abnormality causes and distribution of subscribers.
Provides the intra-frequency neighboring cell analysis and inter-frequency neighboring cell analysis.
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Data sources for Nastar analysis are as follows:
Network performance data (such as MR): The data is used for coverage analysis, neighboring cell analysis, and pilot pollution analysis.
Uplink frequency interference data: The data is used for uplink interference analysis.
Call history record: The data is used for complaint analysis support, VIP analysis, terminal analysis, and cell performance analysis.

UE
NodeB
RNC
Call History Record of Subscribers
Uplink Data of a Service Cell

UMTS Uplink Interference Analysis
Nastar Network-Level Performance Analysis
Create an analysis task
View the analysis result
No
Yes
UMTS Coverage Analysis
The UMTS coverage analysis function enables users to analyze MRs reported by UEs. The analysis results help users to check the coverage status of the measurement cell on the network and determine whether problems such as weak cell coverage, cross coverage, and poor service quality occur on the network.
The MRs reported by UMTS NEs include downlink RSCP, Ec/No, and time propagation (TP).
After setting conditions for the coverage analysis on the Nastar, users can perform coverage analysis for the selected cells. The Nastar displays the analysis result in a two-dimensional (2-D) chart, a three-dimensional (3-D) chart, and a table.
The Nastar displays the RSCP_DL, Ec/No_DL, and TP counters of the AMR, VP, BE, AMR+BE, and other services in a 2-D chart.
The Nastar displays three counters of PS services and CS services respectively in a 3-D chart. The counters include RSCP_DL, Ec/Io_DL, and TP.
The Nastar displays the summary of all counters corresponding to services involved in all 2-D charts in a summary table.
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TP comes from the transmission delay inside Huawei. 1 TP = 234 m. In the MR, the value ranges of the actually reported TP range are as follows:
0 (0*TP,0.5*TP); 1 (0.5*TP,1.5*TP); 2(1.5*TP,2.5*TP)…
UMTS Coverage Analysis — Network Evaluation
Evaluate the network radio condition based on the call information of subscribers
Good network coverage (85% RSCP > – 100 dBm, Ec/NO > – 12 dB)
Poor Ec/NO
More than 90% of Ec/NO is higher than – 12 dB.
Coverage distance is primarily within one kilometer.
Good coverage. More than 90% of RSCP is higher than – 100 dBm.
Support for statistics of dual-indicator threshold percentage.
UMTS Coverage Analysis — Network EvaluationProblemLocation
The subscriber complains that network access in a certain area is difficult. It is found that the area is within the coverage of Wei Xing 31 cell.
The data corresponding to the UMTS coverage analysis shows that both the RSCP and Ec/NO in the PS domain of the cell are poor.
No missing neighboring cells of the cell are found. According to the analysis, the antenna downtilt of the cell can be adjusted.
The 2D diagram of BE service shows that the subscribers in average are about 600 m away (70% of the TP is 3).
In 3D diagram (PS: Ec/NO VS TP; PS: RXCP VS TP), neither RSCP nor Ec/NO is good when TP is 3. The average RSCP is -102 dBm and ECNO is about -11 dB.
Service Type
Average TP
The subscribers are distributed by service type.
The remote subscribers often use data services, whereas the near subscribers often use voice services.
The level and quality of both services are good.
Service Type
Average TP
Average RSCP(dBm)
Average ECNO(dB)
UMTS Pilot Pollution Analysis
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E Shan 11, 21
Zhangjialou 11
Zhangyang 11
Rushan 11
Zhang Jialou site is 55 m high and its downtilt is 4 degrees. This results in a wide coverage. The site can be easily polluted by Zhang Yang, Ru Shan and Yuan Shen sites about 2 km away and the number of pollution events is big.
Yuanshen 21, 31
E Shan site is 58 m high. The downtilt of E Shan 11 is 0 degrees and that of E Shan 21 is 1 degree. Due to the cross coverage, Zhang Jialou 11 nearby is easily polluted and the number of pollution events is big.
Dong E site is 25 m high and its downtilt is 15 degrees. It has few pollution events to Zhang Jialou 11.
Button for switching between the polluted cell and the polluter cell
Dong E
Cases of UMTS Pilot Pollution
Zhang Yang 11 has the same pollution impact on Zhang Jialou 11 but has few pollution events to Yuan Shen. Therefore, there is cross coverage in Zhang Jialou.
Zhangyang 11
Overview of UMTS&GSM Intra-Frequency Neighboring Cell Analysis
The general procedure for the neighboring cell analysis is as follows:
1. Query cells with poor handovers, problem cells with more call drops, complaint cells, and cells in VIP areas for emphasis analysis and optimization.
2. For neighboring cells that are obviously miss-configured, add neighboring cell relations.
3. For neighboring cells that are obviously redundant (such as neighboring cells are far from each other, and the number of handovers is small), delete neighboring cell relations.
4. Some neighboring cells may be miss configured due to deep-level network problems caused by network coverage. Check the relative geographical location of the site and the cell antenna. Pay attention to the antenna height, direction angle, antenna downtilt, service area type, and other factors during the geographical analysis, such as cross coverage, reverse antenna connection, and leakage of micro cells.
5. Perform related optimization solutions to evaluate optimization effects.
The information in the MRs reported by UEs reflects the actual transmission of wireless signals. The UMTS neighboring cell analysis function is used to summarize and analyze MRs and events reported by UEs in the network, determine whether neighboring cells of a cell are redundant or miss-configured, and determines whether the priorities of neighboring cells need to be adjusted. The information is intuitively displayed, helping solving network quality problems because neighboring cells are redundant, miss-configured, or the priorities are incorrect.
Neighboring cells are obviously miss-configured.
Antennas are blocked or base stations do not work normally.
The direction angle of the antenna is improper and the cross coverage occurs.
It is obviously that Shiqiaonanti 1 and 2 are not configured as neighboring cells of w Shawan huiting 3.
W Shiqiaodesheng 2, which is near to w Shawanhuiing 3, is not found during the neighboring cell measurement of w Shawanhuiting. It is recommended that to w Shawanhuiing 3 be checked.
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Engineering parameters should correspond to configuration data to greatly improve the efficiency and accuracy of analyzing whether neighboring cells are miss-configured or redundant.
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Downlink Data in a Neighboring
Cell
Performance
Data

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GENEX NASTAR