VOLTE网络接通率主要错误码分析V1Word文档下载推荐.docx

1、1513209913431078500Internal Server Error3384207113132745183session progress 959248711793400 Bad Request28769218146502 Bad Gateway505319186368501 Not Implemented129712228100Trying 118101408Request Timeout27170271442616583481 Call Leg Or Transaction Does Not Exist16514124140200OK 210113921011162332581

2、5513Message Too Large8402 Payment Required5349996180Ringing 10009982823410 Gone11101380Alternative Service104526118403Forbidden22321152404 Not Found13991034480Temporarily Unavailable9351750779484Address Incomplete14471160486 Busy Here234039488487Request Terminated741656189599488Not Acceptable Here21

3、5209600 Busy Everywhere603 Decline7163141789604Does Not Exist Anywhere10486606 Not Acceptable21162.1 503失败码分析取8月10号全天数据进行分析：拆线网元分析：sipfri_ne_type_SIP首拆网元类型MOCMTC总计（MOC+MTC）503_失败占MOC侧失败占比占MTC侧失败占比占总失败占比ATCF0.08%0.00%0.07%CATASeMSC731.10%0.62%741.09%ICSCF130.20%140.21%MGCF553583.41%1.86%553881.48%MMT

4、ELAS0.09%SBC91013.71%6439.75%97414.33%SCCAS0.11%0.12%SCPAS0.05%0.04%SCSCF781.18%3.11%831.22%UE8552.80%921.35%未知总计6636100.00%1616797整体情况：1、 总体上看（MOC+MTC）503原因码失败总次数为6797次，其中MOC侧失败6636次，失败主要集中在MOC侧。2、 MOC侧失败拆线网元主要为MGCF,MOC侧拆线网元为MGCF失败5535条记录,占比95%。3、 MTC侧失败拆线网元主要为UE和SBC。详细分析：从上述分析中可以看出呼叫失败主要集中在MOC侧，拆线

5、网元以MGCF为主。现从SIP首拆Warning警告正文，Q850原因值，sipfri_msg_SIP首拆消息等维度对由于MOC侧MGCF拆线导致的呼叫失败做进一步分析。1） SIP首拆Warning警告正文灰色底纹为SIP首拆Warning警告正文，白色底纹部分为该警告正文对应的SIP首拆Reason头域Q.850原因。 sipfri_warning_text_SIP首拆Warning警告正文/sipfri_q850_cause_SIP首拆Reason头域Q.850原因值失败占比拆线网元0 RELEASE FROM CC! ExternalRel:0 PeerType:233 Call St

6、ate:7 R250.45%1.1Recovery on timer expiry1 PeerType:4 R150.27%2.1No circuit/channel available2.2Switching equipment congestion2.3Temporary failure535496.73%3.1Bearer capability not presently available3.2Destination out of order3.3183.4No user responding3.5Normal unspecified3.63.7Requested circuit/ch

7、annel not available43.8Resources unavailable, unspecified603.93.1052503.11Unassigned8 R4.1506 SIPSL_ReleaseForMgcfSuppressTone（）: release mgcf and cs. im1352.44%5.1Network out of order5.25.31305.491 RELEASE COMPLETE FROM CC!501 Call 6.1从上表看出，SIP首拆Warning警告正文以0 RELEASE FROM CC!7 R居多，占比96.73。对应的Q.850原

8、因为Temporary failure为主。2） Q850原因值如下：原因值解释失败条数100%41525595%441342%471%3436102420%58273831126对应首拆Reason头域Q.850原因值为41，主要错误原因为Temporary failure居多，问题场景如下：SIPWarning头域场景描述503 Service UnavailableReason: Q.850;cause=41;text=Temporary failureIMS用户和CS互通，CS侧拆线，Q.850原因 。核查小区:揭阳普宁流沙镇紫晖园E-HLW-1（ECI=182330369），从炎强话单详情上看，针对失败原因码为503，MGCF拆线，SIP首拆Reason头域Q.850警告正文为Temporary failure的，失败定位为“对端CS被叫终端或者VOLTE被叫终端域选到2/3G未响应或不可达”，怀疑被叫侧无线质差导致未接通，信令流程如下：