成都移动GSM网络无线接入性指标优化专题报告

-.z编写部门工程名称资料版本工程阶段**移动GSM网络无线接入性指标优化专题报告拟制：陈保林日期：日期：日期：华为技术**所有侵权必究目录TOC\o"1-3"1、背景介绍32、无线接入性指标定义33、指配失败原因分析43.1TCH指配失败原因分析43.1.1TCH指配失败原因分类43.1.2TCH失败原因分析和措施53.2SDCCH立即指配失败原因分析64、处理方案65、A接口信令分析66、分析结论117、解决方案118、实施结果12背景介绍**移动网络是华为公司在中国移动省会城市中最大的网络，其有4万多个载频，目前各项KPI指标良好，只是无线接入性指标稍差，达不到省移动要求的99％的挑战指标，故华为F100工程组把该指标的提升作为一个专题来加以攻关并最终解决。考核项考核指标对象03月31日话统(6个忙时周平均值〕小区级无线切换成功率(%)整网考核值以移动集团公司，**省移动公司对**移动无线优化侧的考核指标为基准。无线接通率〔含切换〕(%)整网TCH系统掉话率(%)整网无线接入性(%)整网SDCCH掉话率(%)整网BSS呼叫建立成功率(%)整网TCH上行无线质量指示HQI(%)整网TCH下行无线质量指示HQI(%)整网SDCCH拥塞率(%)整网TCH拥塞率(含切换)(%)整网DTMOS干道掉话率干道呼叫接通率干道CQT接收质量VIP区域掉话率VIP区域呼叫接通率VIP区域表1：**移动GSM网络考核指标无线接入性指标定义根据移动集团对无线接入性指标定义：无线接入成功率＝SDCCH分配成功率*TCH分配成功率，可以得知无线接入性指标决定于SDCCH分配成功率和TCH分配成功率，而这两个指标公式如下：SDCCH分配成功率〔含SDCCH拥塞〕=SDCCH立即指配成功次数/SDCCH立即指配尝试次TCH分配成功率〔含TCH拥塞，并且不包含切换〕＝TCH指配成功次数/TCH指配尝试次数因此要提高TCH和SDCCH的指配成功次数，必须分析清楚是哪些因素导致TCH和SDCCH指配失败。指配失败原因分析TCH指配失败原因分析TCH指配失败原因分类华为TCH指配失败的主要原因一般按照以下来分类：状态机和ASSREQ消息类：BSC当前的呼叫状态机不应该收到ASSREQ消息ASSREQ消息无法解析ASSREQ消息中携带的A接口电路号〔CIC〕不可用ASSREQ消息中携带的A接口电路号〔CIC〕已被其他呼叫占用。资源分配类：无可用的业务信道无可用的Abis资源请求的语音版本不可用地面资源申请失败空口接入类MS接入新信道失败返回原信道BSC等待ASSCMP定时器超时异常类A接口故障MSC去除我们取**全网性能数据，通过计算，原因统计值如下表：TCH指配失败原因值所占比例备注【BSC整体指配失败次数〔其它〕】38.69%MSC去除【BSC整体指配失败次数〔返回原信道〕】27.17%空口导致【BSC整体指配失败次数(无可用信道)】18.64%无业务信道【BSC整体指配失败次数〔定时器超时〕】14.22%定时器问题表2：TCH指配失败原因值统计表统计数据饼图如下：图1：TCH指配失败分布图TCH失败原因分析和措施BSC整体指配失败次数〔其他〕：TCH指配过程中BSC收到MSC的CLEARCMD消息释放导致的指配失败。至于什么原因导致需要寻求人员的协助，可选择几个TCH指配失败严重的BSC进展信令跟踪来分析。BSC整体指配失败次数〔返回原信道〕：是指TCH已经分配，但是由于空口原因导致MS没有接入成功而最终返回原SDCCH信道。原因分析：网络干扰或覆盖差导致TCH指配失败，需要改善空口质量，可进展频点优化，翻开功控III代、EICC等功能。可能存在主B载频和TCH载频电平差较大，系统一旦指配到TCH时隙上，因电平差导致指配失败。需要检查数据，并保持小区载波电平一致。BSC整体指配失败次数(无可用信道)：是指无可用信道或Abis资源问题导致的TCH指配，大局部情况为无TCH信道资源，需要扩容。BSC整体指配失败次数〔定时器超时〕：由于MSC的指配定时器超时导致的指配失败。需要调整MSC定时器参数，如：TNT2，T305，T308和BSC定时器参数，如：T11、T3107。SDCCH立即指配失败原因分析SDCCH指配失败的原因值相对要简单一些，一般包括：无线空口问题导致的失败SD信道资源不够导致的失败我们取**全网性能数据，通过计算，原因统计值如下表：表3：SDCCH指配失败原因值统计表处理方案从上面分析可知，影响无线接入性指标的原因主要是TCH指配，故明确以下方案重点处理TCH指配失败问题。表4：TCH指配失败处理方案A接口信令分析我们取BSC312的话统分析，11月4日总共出现8302次指配过程中的MSC去除。求和项:A3129H:指配失败次数〔MSC去除〕时间汇总2009-11-0400:001132009-11-0401:00842009-11-0402:00562009-11-0403:00352009-11-0404:00242009-11-0405:00312009-11-0406:00642009-11-0407:001412009-11-0408:003132009-11-0409:004942009-11-0410:005412009-11-0411:006152009-11-0412:005252009-11-0413:004702009-11-0414:005092009-11-0415:004962009-11-0416:005172009-11-0417:005922009-11-0418:005932009-11-0419:005372009-11-0420:004952009-11-0421:004752009-11-0422:003612009-11-0423:00221总计8302表5：BSC312MSC去除导致的TCH指配失败统计表跟踪BSC312忙时半个小时的A接口信令进展分析。选取小区69〔皮革城〕进展A接口跟踪，进展分析。在指配过程中，BSC接收到MSC的CLEARCMD命令后，统计为指配失败〔MSC去除〕，但是不发送指配完成和指配失败消息。典型信令分析对象：皮革城小区分析1、指配排队过程中，手机主动释放，原因值为正常释放149282009-11-0610:08:07350A接口BSSAPAuthenticationRequest下行149362009-11-0610:08:07510A接口BSSAPClassmarkUpdate上行150072009-11-0610:08:07980A接口BSSAPAuthenticationResponse上行150132009-11-0610:08:08060A接口BSSAPCmServiceAccept下行150272009-11-0610:08:08450A接口BSSAPSetup上行150302009-11-0610:08:08550A接口BSSAPCallProceeding下行151152009-11-0610:08:08610A接口BSSAPAssignmentRequest下行151162009-11-0610:08:08610A接口BSSAPQueuingIndication上行151352009-11-0610:08:09150A接口BSSAPDisconnect上行―――>原因是0*90:normalcallclearing151702009-11-0610:08:09240A接口BSSAPRelease下行151892009-11-0610:08:09620A接口BSSAPReleaseplete上行151982009-11-0610:08:09690A接口BSSAPClearmand下行原因值：0*09:callcontrol151992009-11-0610:08:09690A接口BSSAPClearplete上行2、指配过程中手机主动释放21352009-11-0610:17:09670A接口BSSAPAuthenticationRequest下行21402009-11-0610:17:09820A接口BSSAPClassmarkUpdate上行21902009-11-0610:17:10290A接口BSSAPAuthenticationResponse上行21972009-11-0610:17:10390A接口BSSAPCmServiceAccept下行22932009-11-0610:17:10760A接口BSSAPSetup上行22992009-11-0610:17:10850A接口BSSAPCallProceeding下行23022009-11-0610:17:10930A接口BSSAPAssignmentRequest下行23032009-11-0610:17:11000A接口BSSAPDisconnect上行――>0*90：normalcallclearing23082009-11-0610:17:11080A接口BSSAPRelease下行23162009-11-0610:17:11240A接口BSSAPStatus上行0*e2:messagetypenotpatiblewithprotocolstate23212009-11-0610:17:11340A接口BSSAPReleaseplete下行23222009-11-0610:17:11340A接口BSSAPClearmand下行23242009-11-0610:17:11360A接口BSSAPClearplete上行3、指配过程中MS主动释放372742009-11-0610:11:06680A接口BSSAPAuthenticationRequest下行372862009-11-0610:11:06820A接口BSSAPClassmarkUpdate上行373892009-11-0610:11:07280A接口BSSAPAuthenticationResponse上行373982009-11-0610:11:07370A接口BSSAPCmServiceAccept下行374422009-11-0610:11:07760A接口BSSAPSetup上行374462009-11-0610:11:07870A接口BSSAPCallProceeding下行374472009-11-0610:11:07930A接口BSSAPAssignmentRequest下行374522009-11-0610:11:08000A接口BSSAPDisconnect上行――>0*90：normalcallclearing374582009-11-0610:11:08090A接口BSSAPRelease下行374642009-11-0610:11:08230A接口BSSAPStatus上行0*e2:messagetypenotpatiblewithprotocolstate374702009-11-0610:11:08320A接口BSSAPReleaseplete下行374712009-11-0610:11:08320A接口BSSAPClearmand下行375002009-11-0610:11:08350A接口BSSAPClearplete上行4、指配过程中MS主动释放274532009-11-0610:16:00460A接口BSSAPAuthenticationRequest下行274592009-11-0610:16:00610A接口BSSAPClassmarkUpdate上行276292009-11-0610:16:01800A接口BSSAPAuthenticationResponse上行276332009-11-0610:16:01890A接口BSSAPCmServiceAccept下行276882009-11-0610:16:02510A接口BSSAPSetup上行276942009-11-0610:16:02600A接口BSSAPCallProceeding下行276992009-11-0610:16:02680A接口BSSAPAssignmentRequest下行277002009-11-0610:16:02740A接口BSSAPDisconnect上行277052009-11-0610:16:02830A接口BSSAPRelease下行277092009-11-0610:16:02970A接口BSSAPStatus上行277592009-11-0610:16:03050A接口BSSAPReleaseplete下行277602009-11-0610:16:03050A接口BSSAPClearmand下行277642009-11-0610:16:03110A接口BSSAPClearplete上行5、手机主动释放10372009-11-0610:23:16920A接口BSSAPCP_Data下行10562009-11-0610:23:17310A接口BSSAPClassmarkUpdate上行13682009-11-0610:23:19680A接口BSSAPCmServiceRequest上行14022009-11-0610:23:19770A接口BSSAPCmServiceAccept下行14132009-11-0610:23:19910A接口BSSAPCP_Ack上行14572009-11-0610:23:20610A接口BSSAPSetup上行14632009-11-0610:23:20710A接口BSSAPCallProceeding下行15472009-11-0610:23:20820A接口BSSAPAssignmentRequest下行15482009-11-0610:23:20840A接口BSSAPDisconnect上行15552009-11-0610:23:20930A接口BSSAPRelease下行16062009-11-0610:23:21320A接口BSSAPStatus上行16142009-11-0610:23:21430A接口BSSAPReleaseplete下行16212009-11-0610:23:21540A接口BSSAPReleaseplete上行16272009-11-0610:23:21630A接口BSSAPClearmand下行16302009-11-0610:23:21630A接口BSSAPClearplete上行6、手机主动释放71322009-11-0610:24:08980A接口BSSAPAuthenticationRequest下行71582009-11-0610:24:09140A接口BSSAPClassmarkUpdate上行72022009-11-0610:24:09610A接口BSSAPAuthenticationResponse上行72042009-11-0610:24:09690A接口BSSAPCmServiceAccept下行72932009-11-0610:24:10550A接口BSSAPSetup上行73222009-11-0610:24:10640A接口BSSAPCallProceeding下行73262009-11-0610:24:10700A接口BSSAPAssignmentRequest下行73532009-11-0610:24:10790A接口BSSAPDisconnect上行73622009-11-0610:24:10890A接口BSSAPRelease下行73892009-11-0610:24:11490A接口BSSAPReleaseplete上行73912009-11-0610:24:11570A接口BSSAPClearmand下行73932009-11-0610:24:11570A接口BSSAPClearplete上行7、被叫手机，MSC主动释放155492009-11-0610:19:02510A接口BSSAPIdentityRequest下行155592009-11-0610:19:02660A接口BSSAPClassmarkUpdate上行156732009-11-0610:19:03130A接口BSSAPIdentityResponse上行156762009-11-0610:19:03220A接口BSSAPSetup下行157482009-11-0610:19:03830A接口BSSAPCallConfirmed上行157582009-11-0610:19:04060A接口BSSAPDisconnect下行―>0*90：normalcallclearing157592009-11-0610:19:04060A接口BSSAPAssignmentRequest下行158482009-11-0610:19:04540A接口BSSAPRelease上行158532009-11-0610:19:04630A接口BSSAPReleaseplete下行158542009-11-0610:19:04630A接口BSSAPClearmand下行158552009-11-0610:19:04630A接口BSSAPClearplete上行8、主叫手机主动释放249932009-11-0610:20:16550A接口BSSAPAuthenticationRequest下行249962009-11-0610:20:16680A接口BSSAPClassmarkUpdate上行250402009-11-0610:20:17150A接口BSSAPAuthenticationResponse上行250432009-11-0610:20:17250A接口BSSAPCmServiceAccept下行251752009-11-0610:20:17860A接口BSSAPSetup上行251802009-11-0610:20:17950A接口BSSAPCallProceeding下行251852009-11-0610:20:18040A接口BSSAPAssignmentRequest下行251872009-11-0610:20:18090A接口BSSAPDisconnect上行251922009-11-0610:20:18180A接口BSSAPRelease下行252072009-11-0610:20:18330A接口BSSAPStatus上行252142009-11-0610:20:18420A接口BSSAPReleaseplete下行252152009-11-0610:20:18430A接口BSSAPClearmand下行252162009-11-0610:20:18430A接口BSSAPClearplete上行9、主叫手机主动释放314362009-11-0610:21:10080A接口BSSAPAuthenticationRequest下行315022009-11-0610:21:10210A接口BSSAPClassmarkUpdate上行315752009-11-0610:21:11390A接口BSSAPAuthenticationResponse上行316522009-11-0610:21:11470A接口BSSAPCmServiceAccept下行316752009-11-0610:21:12090A接口BSSAPSetup上行316802009-11-0610:21:12180A接口BSSAPCallProceeding下行317072009-11-0610:21:12300A接口BSSAPAssignmentRequest下行317082009-11-0610:21:12320A接口BSSAPDisconnect上行317132009-11-0610:21:12400A接口BSSAPRelease下行317152009-11-0610:21:12560A接口BSSAPStatus上行317162009-11-0610:21:12630A接口BSSAPReleaseplete下行317172009-11-0610:21:12640A接口BSSAPClearmand下行317182009-11-0610:21:12670A接口BSSAPClearplete上行10、主叫手机主动释放16522009-11-0610:29:58070A接口BSSAPAuthenticationRequest下行16632009-11-0610:29:58210A接口BSSAPClassmarkUpdate上行17972009-11-0610:29:58910A接口BSSAPAuthenticationResponse上行18032009-11-0610:29:58990A接口BSSAPCmServiceAccept下行19032009-11-0610:29:59860A接口BSSAPSetup