尋呼失敗分析

尋呼失敗問題分析概述在尋呼無響應分析中，通?？梢苑譃橐韵聨讉€原因：位置更新原因：即當發(fā)生尋呼時，手機恰巧進行跨局位置更新，導致尋呼失敗。呼叫建立沖突：MS在開始建立通話到SDCCH信道分配前的時間段，VLR還未標記MS狀態(tài)，系統(tǒng)將尋呼MS，但MS未監(jiān)聽尋呼消息。終端斷電：MS非正常關機到MSC/VLR中隱關機計時器超時前的時間內，對該MS的尋呼，MS無法相應，終端異常操作反映在終端發(fā)生尋呼失敗后的第一個成功的網絡事件是IMSIATTACH弱覆蓋或盲區(qū)：MS處于弱覆蓋或盲區(qū)內，造成MS的尋呼無響應。根據后續(xù)發(fā)生業(yè)務的時間，暫時起名為瞬間弱覆蓋（10分鐘內）或長期弱覆蓋（10分鐘后）。其它：手機異常，手機死機，尋呼丟失，基站工作異常等從G1的尋呼失敗錯誤分布看，其中弱覆蓋或盲區(qū)的原因，占總尋呼失敗的90%以上，因此對弱覆蓋的研究是尋呼失敗的主要原因之一。我們認為，引起這種弱覆蓋的原因可能有以下兩種情況：手機進入弱覆蓋區(qū)，容易脫網和入網的邊界區(qū)基站的paging丟失、SDCCH擁塞、AGCH阻塞，導致無法分配到SDCCH信道，無法上發(fā)pagingresponse消息。前者，受限于現(xiàn)有網絡的覆蓋狀況；后者，設備性能、配置、參數(shù)等設置有關。 為了更加精確的了解瞬間弱覆蓋小區(qū)，我們將時間從10分鐘內改為2分鐘內，這樣統(tǒng)計的結果可能更加接近實際弱覆蓋小區(qū)。 統(tǒng)計結果如下：尋呼失敗后2分鐘內發(fā)生新業(yè)務的小區(qū)排序如下：LACCell_Idcount1715713133042171576631251717156607123351715766331885171575103186017156762185317156194611841尋呼失敗后2-5分鐘內發(fā)生新業(yè)務的小區(qū)排序如下：LACCell_Idcount171576631198617156607118561715766331521171571313148717157180214641715661131442171561946113851715676213611715751031324數(shù)據分析 我們選擇17157_1313和17157_6071兩個小區(qū)為例，分析可能的產生原因。RMS報告弱覆蓋數(shù)據分析17157_1313：園丁花園3上行：質量電平分布如下：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上行弱覆蓋（-95dBm以下）的比例為（67179+17380）/2580381=3.28%下行：質量電平分布如下：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下行弱覆蓋（-95dBm以下）的比例為（40771+24407）/2580381=2.53%上行質量電平分布圖：下行質量電平分布圖：從弱覆蓋電平的比例看，該小區(qū)弱電平比例為2.53%。17156_6631臨河街西區(qū)1上行：質量電平分布如下：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上行弱覆蓋（-95dBm以下）的比例為（28993+500）/4505836=0.65%下行：質量電平分布如下：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下行弱覆蓋（-95dBm以下）的比例為（100673+30936）/4446816=2.96%上行質量電平分布圖：該小區(qū)上行質量較差，電平低于-90dBm后的平均質量超過4，可能會影響其上行的接入。下行質量電平分布圖：該小區(qū)下行的弱覆蓋比例為2.96%。17156_6071金河大廈1上行：質量電平分布如下：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上行弱覆蓋（-95dBm以下）的比例為（35826+8779）/4557374=0.98%下行：質量電平分布如下：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下行弱覆蓋（-95dBm以下）的比例為（142955+86264）/4227476=5.14%上行質量電平分布圖：下行質量電平分布圖：該小區(qū)下行的弱覆蓋比例為5.14%,且電平低于-100dBm的比例為1.93%，可能存在弱覆蓋。關鍵指標的話務統(tǒng)計分析Paging是否丟失、立即指配是否丟失17157_1313：園丁花園3日期開始時間MC8B立即指配次數(shù)MC925F立即指配丟棄次數(shù)立即指配丟棄率MC8A尋呼次數(shù)MC925H尋呼丟棄次數(shù)Paging丟棄率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%園丁花園3小區(qū)幾乎沒有丟失paging和立即指配消息。17157_6631臨河街西區(qū)1日期開始時間MC8B立即指配次數(shù)MC925F立即指配丟棄次數(shù)立即指配丟棄率MC8A尋呼次數(shù)MC925H尋呼丟棄次數(shù)Paging丟棄率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%臨河街七區(qū)1小區(qū)存在少量立即指配消息丟失的現(xiàn)象。17156_6071金河大廈1日期開始時間MC8B立即指標次數(shù)MC925F立即指配丟棄次數(shù)立即指配丟棄率MC8A尋呼次數(shù)MC925H尋呼丟棄次數(shù)Paging丟棄率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%金河大廈1小區(qū)存在少量立即指配消息丟失的現(xiàn)象。SDCCH擁塞和SDCCH分配失敗園丁花園3日期開始時間LACCIMC04SDCCH擁塞MC148SDCCH分配次數(shù)MC149SDCCH分配失敗次數(shù)SDCCH分配失敗率被叫占SDCCH分配比例被叫SDCCH分配失敗次數(shù)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園丁花園3的SDCCH擁塞為0%，SDCCH分配失敗率為2~5%，被叫SDCCH分配失敗次數(shù)25-80次之間。臨河街七區(qū)1日期開始時間LACCIMC04SDCCH擁塞MC148SDCCH分配次數(shù)MC149SDCCH分配失敗次數(shù)SDCCH分配失敗率被叫占SDCCH分配比例被叫SDCCH分配失敗次數(shù)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臨河街七區(qū)1的SDCCH擁塞為0%，SDCCH分配失敗率為2~3%，被叫SDCCH分配失敗次數(shù)50-90次之間。金河大廈1日期開始時間LACCIMC04SDCCH擁塞MC148SDCCH分配次數(shù)MC149SDCCH分配失敗次數(shù)SDCCH分配失敗率被叫占SDCCH分配比例被叫SDCCH分配失敗次數(shù)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金河大廈1的SDCCH擁塞為0%，SDCCH分配失敗率為3~6%，被叫SDCCH分配失敗次數(shù)70~150次之間。從上述的數(shù)據看，被叫SDCCH分配失敗的次數(shù)影響尋呼成功次數(shù)的重要原因之一。而且與話務模型有較大關系，比如，園丁花園3在早忙時SDCCH分配失敗次數(shù)多，而金河大廈1在晚忙時的SDCCH分配失敗次數(shù)多。上行干擾情況園丁花園3日期開始時間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從上行干擾看，園丁花園3基本都在band1，無上行干擾。臨河街七區(qū)1：日期開始時間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臨河街七區(qū)1基本在band2上，底噪稍高，無明顯上行干擾。金河大廈1日期開始時間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