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August 11, 2022 Jim Luan, Lin Mubao 2022/2/16 2 Drive Test Procedure Drive Test Netplan FICS Statistics Analysis Problem Finding VOT/GEP Preparation 2022/2/16 3 Preparation (1) ? Definition File – Without it, it is impossible to observe overshooing neighbors – can convert FP to definition file Neighbor list with definition file Neighbor list without definition file 2022/2/16 4 Preparation (2) ? Frequency Plan amp。 Configuration map ? Software:TEMS, FICS, GEP, VOT ? Hardware: TEMS, GPS, Portable PC ? Test Problem Sheet ? Route ? Map 2022/2/16 5 Drive Test ? For Benchmark – 2 minutes per call – 10 – 15 minutes a log files – Force to appropriate band (GSM only, DCS only or Dual) ? For Special Problem – Planning route – No limitation 2022/2/16 6 TEMS Introduction ? Interface ? Functions 2022/2/16 7 Log File Process TEMS Log File NetPlan FICS VOT/GEP .CSV .FMT Route Map .STA Excel VB .NP/.TXT Much shorter cycle time by VOT and GEP. 2022/2/16 8 TEMS .log file Analysis ? Undecoded BCCH ? BSIC Undecode in Other Site ? No Handover ? Delay Handover ? Ping Pong Handover ? Negative Handover ? Overshooting ? High Overlapping ? No Dominant Server ? Poor Coverage ? Unreasonable Serving Area ? Interference ? Handover Failure ? Handover Loss ? UL Drop ? Drop Call ? Sudden Power Drop ? MS Power Rapid Increase Below lists mon problems which can be observed from Drive Test Log. 2022/2/16 9 Undecoded BCCH (1) Description: – BSICs can’t be decoded in 5s – Usually consider 3 strongest neighbors Reason: – GCLK shift, only decode same site BSICs – Channel interference – NonBCCH carrier, no dedicated spectrum for BCCH 2022/2/16 10 Undecoded BCCH (2)