寻呼失败分析

寻呼失败问题分析概述在寻呼无响应分析中，通常可以分为以下几个原因：位置更新原因：即当发生寻呼时，手机恰巧进行跨局位置更新，导致寻呼失败。呼叫建立冲突：MS在开始建立通话到SDCCH信道分配前的时间段，VLR还未标记MS状态，系统将寻呼MS，但MS未监听寻呼消息。终端断电：MS非正常关机到MSC/VLR中隐关机计时器超时前的时间内，对该MS的寻呼，MS无法相应，终端异常操作反映在终端发生寻呼失败后的第一个成功的网络事件是IMSIATTACH弱覆盖或盲区：MS处于弱覆盖或盲区内，造成MS的寻呼无响应。根据后续发生业务的时间，暂时起名为瞬间弱覆盖（10分钟内）或长期弱覆盖（10分钟后）。其它：手机异常，手机死机，寻呼丢失，基站工作异常等从G1的寻呼失败错误分布看，其中弱覆盖或盲区的原因，占总寻呼失败的90%以上，因此对弱覆盖的研究是寻呼失败的主要原因之一。我们认为，引起这种弱覆盖的原因可能有以下两种情况：手机进入弱覆盖区，容易脱网和入网的边界区基站的paging丢失、SDCCH拥塞、AGCH阻塞，导致无法分配到SDCCH信道，无法上发pagingresponse消息。前者，受限于现有网络的覆盖状况；后者，设备性能、配置、参数等设置有关。 为了更加精确的了解瞬间弱覆盖小区，我们将时间从10分钟内改为2分钟内，这样统计的结果可能更加接近实际弱覆盖小区。 统计结果如下：寻呼失败后2分钟内发生新业务的小区排序如下：LACCell_Idcount1715713133042171576631251717156607123351715766331885171575103186017156762185317156194611841寻呼失败后2-5分钟内发生新业务的小区排序如下：LACCell_Idcount171576631198617156607118561715766331521171571313148717157180214641715661131442171561946113851715676213611715751031324数据分析 我们选择17157_1313和17157_6071两个小区为例，分析可能的产生原因。RMS报告弱覆盖数据分析17157_1313：园丁花园3上行：质量电平分布如下：UL_RXLEV(dBm)Qual|0Qual|1Qual|2Qual|3Qual|4Qual|5Qual|6Qual|7Tot_MEASAvg_Qual[-47,-60)1663347151656613327365174330.2[-60,-65)47956187188201189217319187494440.13[-65,-70)1163104524564954574574634571195470.11[-70,-75)22089493199712618728698698692275620.11[-75,-80)35724431843076420620271514140614063740630.15[-80,-85)91402614385115841374563043798359935999710400.17[-85,-90)47611818416156251559986165344335218745449440.35[-90,-95)127601123751215013138105457896514829361917891.09[-95,-100)275485368572373266927619245723523671792.23[-100,-110)2641900112617642088238121124368173804.14上行弱覆盖（-95dBm以下）的比例为（67179+17380）/2580381=3.28%下行：质量电平分布如下：DL_RXLEV(dBm)Qual|0Qual|1Qual|2Qual|3Qual|4Qual|5Qual|6Qual|7Tot_MEASAvg_Qual[-47,-60)475854653943142501862343266526940.54[-60,-65)9395813661060895598426369369990410.16[-65,-70)233301290122411749126711919139132444760.15[-70,-75)74952949823920391029522952294229427741290.12[-75,-80)58985861495837385732032468232323236160180.14[-80,-85)37595655895474445232712451155414804002270.19[-85,-90)2038624540381338253066224313158532235170.27[-90,-95)82239328229182888258019911305625978280.51[-95,-100)29111197819532208200717751170569407710.99[-100,-110)122441378146817992044224919261299244072.04下行弱覆盖（-95dBm以下）的比例为（40771+24407）/2580381=2.53%上行质量电平分布图：下行质量电平分布图：从弱覆盖电平的比例看，该小区弱电平比例为2.53%。17156_6631临河街西区1上行：质量电平分布如下：UL_RXLEV(dBm)Qual|0Qual|1Qual|2Qual|3Qual|4Qual|5Qual|6Qual|7Tot_MEASAvg_Qual[-47,-60)16275599914960940246663181220.46[-60,-65)25506101118175595558725122279000.4[-65,-70)65567259329497114010181211257702780.3[-70,-75)1691192231214818162547227723896671831940.29[-75,-80)500739285632600721119141258084445019716050580.46[-80,-85)155042421199019447414787569976257418943610422155270.7[-85,-90)3679811210761518541746431329496946827855784810536741.95[-90,-95)20072120672019542338658387227749128206753025904.11[-95,-100)224211416108924715185857910818289935.77[-100,-110)0032327933725006.64上行弱覆盖（-95dBm以下）的比例为（28993+500）/4505836=0.65%下行：质量电平分布如下：UL_RXLEV(dBm)Qual|0Qual|1Qual|2Qual|3Qual|4Qual|5Qual|6Qual|7Tot_MEASAvg_Qual[-47,-60)226042384043633032111815243295471.43[-60,-65)39417810865770447298176154429370.24[-65,-70)156089327033103104188611136106101699920.24[-70,-75)89750016821135541125455044114353535159557970.17[-75,-80)1021811267492456320006994540234023402311151430.22[-80,-85)858779353123226127202167088736385433819862330.34[-85,-90)5584893241730766269231930911915511922096871470.52[-90,-95)23099822582223842158515840961244909203284110.84[-95,-100)49043949610739114629968649628616081006731.58[-100,-110)13455177022483336394437621954467309362.13下行弱覆盖（-95dBm以下）的比例为（100673+30936）/4446816=2.96%上行质量电平分布图：该小区上行质量较差，电平低于-90dBm后的平均质量超过4，可能会影响其上行的接入。下行质量电平分布图：该小区下行的弱覆盖比例为2.96%。17156_6071金河大厦1上行：质量电平分布如下：UL_RXLEV(dBm)Qual|0Qual|1Qual|2Qual|3Qual|4Qual|5Qual|6Qual|7Tot_MEASAvg_Qual[-47,-60)12808650475315032032917189912411369350.29[-60,-65)1912012308191421982060999180112082036890.22[-65,-70)3009351198910600886063932685325425323472480.39[-70,-75)4550034047142768394802695912327622334576266880.76[-75,-80)588190935431170221351521132526026921750622511354031.46[-80,-85)61151383753117017165179181357141063635431655413799791.99[-85,-90)218649106591475628536504487973789374438535360122.93[-90,-95)614414990409945385127727318193411541468153.28[-95,-100)66193101354441464440480638535317358263.48[-100,-110)9130601012986601587595287796.39上行弱覆盖（-95dBm以下）的比例为（35826+8779）/4557374=0.98%下行：质量电平分布如下：UL_RXLEV(dBm)Qual|0Qual|1Qual|2Qual|3Qual|4Qual|5Qual|6Qual|7Tot_MEASAvg_Qual[-47,-60)10531113378179931812311760284441473711771941.24[-60,-65)1356391875422237189911014728895585342097490.87[-65,-70)269084426625225743918217856178110610594380490.94[-70,-75)6296627701487657750224321414954312124799331230.82[-75,-80)5061897139587411856406147431385987519918553601.14[-80,-85)34540763285825459254681235558232236726527458601.69[-85,-90)21058243515568936978271995622433112543205504552.15[-90,-95)10903523492297463853144239424922568044713176862.43[-95,-100)4487210991124651551619085219551534327281429552.66[-100,-110)249085981750092821145012746108633534862642.88下行弱覆盖（-95dBm以下）的比例为（142955+86264）/4227476=5.14%上行质量电平分布图：下行质量电平分布图：该小区下行的弱覆盖比例为5.14%,且电平低于-100dBm的比例为1.93%，可能存在弱覆盖。关键指标的话务统计分析Paging是否丢失、立即指配是否丢失17157_1313：园丁花园3日期开始时间MC8B立即指配次数MC925F立即指配丢弃次数立即指配丢弃率MC8A寻呼次数MC925H寻呼丢弃次数Paging丢弃率2009-08-0310:00551940.07%8035800.00%2009-08-0319:00535900.00%8273800.00%2009-08-0410:00608700.00%8619000.00%2009-08-0419:00511770.14%8213300.00%2009-08-0510:00544010.02%8598800.00%2009-08-0519:00519640.08%8109100.00%2009-08-0610:00579510.02%8829900.00%2009-08-0619:00504530.06%8424600.00%2009-08-0710:00562090.16%8758900.00%2009-08-0719:00480510.02%8643100.00%2009-08-1010:00523500.00%8465300.00%园丁花园3小区几乎没有丢失paging和立即指配消息。17157_6631临河街西区1日期开始时间MC8B立即指配次数MC925F立即指配丢弃次数立即指配丢弃率MC8A寻呼次数MC925H寻呼丢弃次数Paging丢弃率2009-08-0310:00830380.10%8035800.00%2009-08-0319:0011388220.19%8274400.00%2009-08-0410:00901990.10%8620800.00%2009-08-0419:0010715140.13%8215100.00%2009-08-0510:00842560.07%8598400.00%2009-08-0519:0010736310.29%8110230.00%2009-08-0610:00886130.03%8829500.00%2009-08-0619:0010753300.28%8426300.00%2009-08-0710:00912980.09%8759900.00%2009-08-0719:001069470.07%8642900.00%2009-08-1010:00882570.08%8465700.00%临河街七区1小区存在少量立即指配消息丢失的现象。17156_6071金河大厦1日期开始时间MC8B立即指标次数MC925F立即指配丢弃次数立即指配丢弃率MC8A寻呼次数MC925H寻呼丢弃次数Paging丢弃率2009-08-0310:0011633160.14%8035810.00%2009-08-0319:0010704300.28%8273800.00%2009-08-0410:0011420190.17%8619020.00%2009-08-0419:0010305370.36%8213310.00%2009-08-0510:0012264220.18%8598860.01%2009-08-0519:009618440.46%8109100.00%2009-08-0610:0011593190.16%8829960.01%2009-08-0619:009849580.59%8424640.00%2009-08-0710:0011544100.09%8758940.00%2009-08-0719:0011491240.21%8643100.00%2009-08-1010:0011458230.20%84653130.02%金河大厦1小区存在少量立即指配消息丢失的现象。SDCCH拥塞和SDCCH分配失败园丁花园3日期开始时间LACCIMC04SDCCH拥塞MC148SDCCH分配次数MC149SDCCH分配失败次数SDCCH分配失败率被叫占SDCCH分配比例被叫SDCCH分配失败次数2009-08-0310:0017157_1313055192143.88%29.0%622009-08-0319:0017157_1313053591352.52%27.9%382009-08-0410:0017157_1313060872844.67%28.0%802009-08-0419:0017157_1313051161242.42%30.1%372009-08-0510:0017157_1313054412394.39%28.2%672009-08-0519:0017157_131305196961.85%29.3%282009-08-0610:0017157_1313057952293.95%29.1%672009-08-0619:0017157_131305046961.90%26.0%252009-08-0710:0017157_1313056192965.27%27.7%822009-08-0719:0017157_131304805891.85%30.1%272009-08-1010:0017157_1313052352755.25%26.3%72园丁花园3的SDCCH拥塞为0%，SDCCH分配失败率为2~5%，被叫SDCCH分配失败次数25-80次之间。临河街七区1日期开始时间LACCIMC04SDCCH拥塞MC148SDCCH分配次数MC149SDCCH分配失败次数SDCCH分配失败率被叫占SDCCH分配比例被叫SDCCH分配失败次数2009-08-0310:0017157_6631083032883.47%25.4%732009-08-0319:0017157_66310113882702.37%23.9%652009-08-0410:0017157_6631090192642.93%27.1%712009-08-0419:0017157_66310107152382.22%23.4%562009-08-0510:0017157_6631084253303.92%27.8%922009-08-0519:0017157_66310107362402.24%25.7%622009-08-0610:0017157_6631088613183.59%28.6%912009-08-0619:0017157_66310107532262.10%25.5%582009-08-0710:0017157_6631091296176.76%26.6%1642009-08-0719:0017157_66310106942272.12%23.9%542009-08-1010:0017157_6631088252833.21%25.5%72临河街七区1的SDCCH拥塞为0%，SDCCH分配失败率为2~3%，被叫SDCCH分配失败次数50-90次之间。金河大厦1日期开始时间LACCIMC04SDCCH拥塞MC148SDCCH分配次数MC149SDCCH分配失败次数SDCCH分配失败率被叫占SDCCH分配比例被叫SDCCH分配失败次数2009-08-0310:0017156_60710116334163.58%18.6%772009-08-0319:0017156_60710107047106.63%19.9%1412009-08-0410:0017156_60710114194163.64%20.0%832009-08-0419:0017156_60710103055635.46%19.8%1122009-08-0510:0017156_60710122654653.79%22.8%1062009-08-0519:0017156_6071096195195.40%20.0%1042009-08-0610:0017156_60710115934563.93%20.5%942009-08-0619:0017156_6071098495285.36%19.3%1022009-08-0710:0017156_60710115444223.66%20.5%872009-08-0719:0017156_60710114917496.52%20.2%1512009-08-1010:0017156_60710114583923.42%18.7%73金河大厦1的SDCCH拥塞为0%，SDCCH分配失败率为3~6%，被叫SDCCH分配失败次数70~150次之间。从上述的数据看，被叫SDCCH分配失败的次数影响寻呼成功次数的重要原因之一。而且与话务模型有较大关系，比如，园丁花园3在早忙时SDCCH分配失败次数多，而金河大厦1在晚忙时的SDCCH分配失败次数多。上行干扰情况园丁花园3日期开始时间LACCIMC320AINTERF_BAND1MC320BINTERF_BAND2MC320CINTERF_BAND3MC320DINTERF_BAND4MC320EINTERF_BAND52009-08-0310:0017157_13131600002009-08-0319:0017157_1313700002009-08-0410:0017157_13131610002009-08-0419:0017157_13131210002009-08-0510:0017157_13131610002009-08-0519:0017157_13131210002009-08-0610:0017157_13131410002009-08-0619:0017157_13131100002009-08-0710:0017157_13131510002009-08-0719:0017157_13131300002009-08-1010:0017157_1313172000从上行干扰看，园丁花园3基本都在band1，无上行干扰。临河街七区1：日期开始时间LACCIMC320AINTERF_BAND1MC320BINTERF_BAND2MC320CINTERF_BAND3MC320DINTERF_BAND4MC320EINTERF_BAND52009-08-0310:0017157_66310120002009-08-0319:0017157_6631090002009-08-0410:0017157_66310130002009-08-0419:0017157_6631080002009-08-0510:0017157_66310120002009-08-0519:0017157_6631090002009-08-0610:0017157_66310120002009-08-0619:0017157_6631070002009-08-0710:0017157_66310140002009-08-0719:0017157_6631090002009-08-1010:0017157_6631013000临河街七区1基本在band2上，底噪稍高，无明显上行干扰。金河大厦1日期开始时间LACCIMC320AINTERF_BAND1MC320BINTERF_BAND2MC320CINTERF_BAND3MC320DINTERF_BAND4MC320EINTERF_BAND52009-08-0310:0017156_6071031002009-08-0319:0017156_6071020002009-08-0410:0017156_6071040002009-08-0419:0017156_6071020002009-08-0510:0017156_6071030002009-08-0519:0017156_6071021002009-08-0610:0017156_6071030002009-08-0619:0017156_6071020002009-08-0710:0017156_6071020002009-08-0719:0017156_6071021002009-08-1010:0017156_607104100