Nokia Radio Network Planning, Southern Regio Agenda Introduction of NETWORK PERFORMANCE tools (AIS Access Database for Optimization) Brief on main KPI formulas Drop call analysis SDCCH and TCH counters and meaning Explanation of RNO process BTC Power control and related parameters recommendation.
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Nokia Radio Network Planning, Southern Region
AgendaIntroduction of NETWORK PERFORMANCE tools (AIS
Access Database for Optimization) Brief on main KPI formulasDrop call analysisSDCCH and TCH counters and meaningExplanation of RNO process
BTC Power control and related parameters recommendation.
Nokia Radio Network Planning, Southern Region
Main Objective
Tools for daily Network Performance monitoring Iterative process to maintain and improve
network performanceDiscuss and understand the important BSC statistics in
GSM network.Identify the reason of the problem cells and rectify the
faults.
Nokia Radio Network Planning, Southern Region
Optimization Activities Daily performance data monitoring and problems troubleshooting Weekly/Monthly quality report Neighbouring relationship and parameter setting review Coverage optimisation Frequency replan Feature setting design Drive test
Run 196 report to check UL and DL per TRX distribution
Nokia Radio Network Planning, Southern Region
Drop call analysis, common problems
Hardware and transmission fault -> check TCH drop reason, TCH availability
and transmission.
Interference -> Check possible interference by using Mapinfo, Check UL and
DL quality, site too high? (check TA-232 distribution report)
Coverage problem/Island site
Handover problem -> To check if any potential neighbours is not defined or
missing of neighbour relation
Wrong feeder connection
Neighbour site down
Nokia Radio Network Planning, Southern Region
Daily Top 10 or 20 Worse TCH/SDCCH DCR performance cells
Hardware fault RF problems
Check BTS alarm Check BCCH missing
Report to OMC
YesNo
Check frequency plan, neighbor site status (site down?), site to site distance (232 report), antenna height and antenna tilting - Mapinfo or Prediction tools
No
Refer KPIs trends like Calls, TCH drop rate and reason of drop, UL and DLquality, UL interference band, Handover performance, call distance, CSSR….
Majority drop due to TR_Fail, A_IF_Fail_Call, BTSYes
Suggestion for improvement
Conduct drive test
Yes
No
Optimization process, Worse TCH Drop Rate
Discuss with AIS’s Optimizationteam and Planning team. Issue work order for any suggestions.
Nokia Radio Network Planning, Southern Region
Optimization process, Worse HO performance Daily Top 10 or 20 Worse handover performance cells
Hardware fault RF problems
Check BTS alarm Check BCCH missing
Report to OMC
YesNo
Possible reasons: Target cell has co-channel/Adj channel interference, coverage gaps, hardware failure, neighbor BCCH/BSICfrequency not updated, wrong CGI format in MSC, wrong HO number in MSC, Non-symmetric HO relations, synchronization problem, excessive UL interference, site too high, Direct Retry traffic cause high HO Failures(KTU13).
Refer to handover reason, UL and DL quality, UL interference band
Check 153 HO report to find out majority failurestowards which cells?
Suggestion for improvement
Conduct drive test
Yes
No
Discuss with AIS’s Optimizationteam and Planning team. Issue work order for any suggestions.