[信息與通信]tems基礎(chǔ)知識(shí)-全文預(yù)覽
【正文】 o limitationDate 5TEMS Introduction?Interface?FunctionsDate 6Log File Process TEMS Log FileNetPlanFICSVOT/GEP.Route Map.STAExcel VB.NP/.TXT Much shorter cycle time by VOT and GEP.Date 7TEMS .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 IncreaseBelow lists mon problems which can be observed from Drive Test Log.Date 8Undecoded BCCH (1)Description:– BSICs can’t be decoded in 5s– Usually consider 3 strongest neighborsReason:– GCLK shift, only decode same site BSICs– Channel interference– NonBCCH carrier, no dedicated spectrum for BCCHDate 9Undecoded BCCH (2)Date 10BSIC Undecode in Other SiteDescription:– BSIC in same site can be decoded but not for other sites– Handover can only happen in intrasite basis– It is similar to former Undecoded BCCH caseReason:– GCLK shift? GCLK recalibration is required? No one monitors OMCR alarmsDate 11No Handover (1)Description:– Neighbor BSIC is decoded and COMMON handover requirement is fulfilled but there is never a handoverReason:– Missing neighbor? No such neighbor in CM database– Incorrect external neighbor? Target cell’s LAC/BCCH/BSIC in add_neighbor is different from those in equip_rtf? Engineer modifies external neighbor at MMI, not through GUI? Never use OMCR Proxy Cell to propagate external neighbor information– N hreqt. Great HO_MARGIN. Improp
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