移动网络接通率呼损分析 根据系统接通率的公式,isup信令的cause=16,18,21,41,47是呼损,对应的具体含义是: Cause值 中创信令仪定义 Isup规范含义  16 正常的呼叫拆线 Normal clear  18 用户未响应 User no responding  21 呼叫拒收 Call reject  41 临时故障 Temporary failure  47 资源不可用-未指定 Resources not unavailible   由于这几种呼损占全部呼损的90%以上,因此对10月21日-11月12日的晚忙时18:00-19:00进行了详细的统计,选择这个时段的具体原因是晚忙时系统接通率较低,晚忙时18:00--21:00中18:00-19:00的话务量最高,也是这个晚忙时最低的时段。 以下为这个时段的呼损曲线:  从上图可以看出,正常的呼叫拆线比例居高不下,是呼损最高的,用户未响应的波动很大,近期趋于稳定,但较10月末略差,呼叫拒收的比例一直较低,临时故障的比例在1%-2%之间波动,资源不可用的比例较10月份下降非常明显。 对于以上的情况,我们根据中创信令监测系统的历史查询功能和k1205信令仪对bsc1的历史跟踪记录,查找到A+相应的被叫流程(注:两个系统相差3分50秒左右) 正常的呼叫拆线(CAUSE 16)(亦即被叫侧未接通,但由被叫侧发起释放的情况) a) case 1 ISUP信令流程: 17:36:14.504.334 ISUP_IAM ( 4106812739 -> 13900434331 ) 17:36:16.860.498 ISUP_ACM 17:36:28.189.539 ISUP_REL ( Normal Call Clearing ) 17:36:28.314.979 ISUP_RLC 详细的信令见:  相应的A+被叫流程为: +---------------------+------------+-------------------+---------------------+ |Long Time |Last Prot |Last MSG |Calling Party | +---------------------+------------+-------------------+---------------------+ |17:32:19,650,122 |DTAP |PAGRES LAC=17217 CELL=3351 |17:32:19,740,523 |SCCP |CC |17:32:19,832,255 |DTAP |TRCM |17:32:19,868,994 |BSSM |CLUP |17:32:20,106,616 |BSSM |CLUPD |17:32:20,305,731 |DTAP |TRCMP |17:32:20,890,139 |DTAP |SETUP |`04106812739` | |17:32:21,248,222 |DTAP |CCONF |17:32:21,435,766 |BSSM |ASREQ |17:32:22,220,841 |BSSM |ASCMP |17:32:22,316,710 |DTAP |ALERT |17:32:33,662,375 |DTAP |DISC Normal call clearing (BSC发给 MSC) |17:32:33,707,296 |DTAP |RELEAS |17:32:33,921,104 |DTAP |RELCMP |17:32:33,967,288 |BSSM |CLCMD |17:32:34,382,985 |BSSM |CLCMP |17:32:34,420,520 |SCCP |RLSD |17:32:34,448,483 |SCCP |RLC 详细A+流程见: 从A接口的信令流程中我们可以看出:在正常的振铃开始后11秒左右,由BSC主动发起了DISC消息,因此MSC向主叫侧(A局)发送了REL消息,并将这种呼叫计入了呼损的范畴。 这种CASE的另外一个信令流程略有不同: b) case 2 ISUP信令流程: 17:51:27.563.601 ISUP_IAM ( 13894402502 -> 13900434087 ) 17:51:29.727.773 ISUP_ACM 17:51:39.940.469 ISUP_REL ( Normal Call Clearing ) 17:51:40.126.061 ISUP_RLC 详细的信令见: 在ACM后10秒,被叫侧发起拆线。 相应的A+被叫流程为: +---------------------+------------+-----------------------+--------------------+ |Long Time |Last Prot |Last MSG |Calling Party | +---------------------+------------+-----------------------+--------------------+ |17:48:05,531,081 |DTAP |PAGRES LAC=17217 CELL=1102 BSC1 |17:48:05,630,149 |SCCP |CC |17:48:05,759,324 |BSSM |CLUPD |17:48:05,992,816 |BSSM |CLUPD |17:48:07,107,255 |DTAP |SETUP 13894402502 |17:48:07,368,811 |DTAP |CCONF |17:48:07,577,507 |BSSM |ASREQ |17:48:08,349,803 |BSSM |ASCMP |17:48:08,453,303 |DTAP |ALERT |17:48:15,068,100 |BSSM |HORQD LAC=17217 CELL=2083 BSC2 |17:48:15,548,884 |BSSM |HORQD LAC=17217 CELL=2083&2063 BSC2 |17:48:15,649,593 |DTAP |HOCMD LAC=17217 CELL=2083 |17:48:16,233,701 |BSSM |CLCMD |17:48:16,643,385 |BSSM |CLCMP |17:48:16,674,969 |SCCP |RLSD |17:48:16,699,751 |SCCP |RLC 详细A+流程见: 从A+信令可以看出MS进行了切换(切出),并且切换成功后,进行了正常的拆线工作,释放了SCCP层的连接。MS从BSC1切换到了BSC2,随后的消息因为没有对BSC2进行跟踪,因此无法确认原因。但是从以上消息可以确认的是,在振铃阶段MS可以进行切换,但是如果MSC内部BSC间的切换成功率低的话对接通率会有负面的影响。 另一方面,这种情况在其他地区发生过突然增加的情况,经过核实是由于主叫回拨业务引起的,其特点是MS在做被叫时振铃并收到CALLING-ID后,主动发起了释放消息,但是由于这种被叫是一种设备,发送的并非被叫拒接的消息,在MSC侧根据CMCC接通率的定义,作为呼损项。这种呼叫的特点是:在呼损较高的时段的呼损组成号码较为集中在几个重复频次较高的号码上,多为同一地区的号段,占用时长多在6秒以内,在四平的MSC下也发现了这种情况。11月8日为例: 序号 时间 占用次数 网络接通率(%)(次数) [16]正常的呼叫拆线(Clf)(%) [18]用户未响应(%) [41]临时故障(%) [47]资源不可用-未指定(%)  1  2005-11-08 20:00:00 2050 93.51 51( 2.49) 39( 1.90) 17( 0.83) 2( 0.10)  2  2005-11-08 19:00:00 2458 91.62 128( 5.21) 36( 1.46) 28( 1.14) 2( 0.08)  3  2005-11-08 18:00:00 2733 91.58 120( 4.39) 46( 1.68) 31( 1.13) 8( 0.29)   11月8日的18:00-20:00接通率突然下降,可以看出正常呼叫拆线的比例上升到了 5.21%和4.39%,具体的号码分布如下: 编号 开始时间 主叫号码 被叫号码 呼叫结果 占用时长(秒)  1 2005-11-08 19:28:44 01089259617 13900434236 正常的呼叫拆线(Clf) 45.8  2 2005-11-08 19:04:38 02268694692 13900434266 正常的呼叫拆线(Clf) 26.8  3 2005-11-08 19:03:48 04105160412 13900434230 正常的呼叫拆线(Clf) 20.1  4 2005-11-08 18:21:57 4105271407 13900434123 正常的呼叫拆线(Clf) 30.8  5 2005-11-08 19:22:36 04124676536 13900434459 正常的呼叫拆线(Clf) 7.8  6 2005-11-08 19:23:11 04124676536 13900434147 正常的呼叫拆线(Clf) 4  7 2005-11-08 18:37:14 04294203641 13900434470 正常的呼叫拆线(Clf) 11.2  8 2005-11-08 18:23:42 04592631671 13900434000 正常的呼叫拆线(Clf) 21.7  9 2005-11-08 18:10:39 04694991121 13900434025 正常的呼叫拆线(Clf) 12.4  10 2005-11-08 19:05:10 05795636420 13900434183 正常的呼叫拆线(Clf) 9.1  11 2005-11-08 18:56:32 05945968059 13900434231 正常的呼叫拆线(Clf) 6.8  12 2005-11-08 19:30:58 09178695339 13900434253 正常的呼叫拆线(Clf) 9  13 2005-11-08 18:46:22 13032458866 13900434257 正常的呼叫拆线(Clf) 8.2  14 2005-11-08 18:52:16 13225457856 13900434417 正常的呼叫拆线(Clf) 4.6  15 2005-11-08 19:51:28 13370611506 13900434336 正常的呼叫拆线(Clf) 8.1  16 2005-11-08 19:51:58 13370611506 13900434128 正常的呼叫拆线(Clf) 6.3  17 2005-11-08 19:52:19 13370611506 13900434388 正常的呼叫拆线(Clf) 4.4  18 2005-11-08 18:43:05 13386888323 13900434197 正常的呼叫拆线(Clf) 22.9  19 2005-11-08 18:13:00 13422785886 13900434225 正常的呼叫拆线(Clf) 2.9  20 2005-11-08 18:20:54 13455290979 13900434159 正常的呼叫拆线(Clf) 7.1  21 2005-11-08 18:45:56 13455290979 13900434003 正常的呼叫拆线(Clf) 4.1  22 2005-11-08 18:14:07 13464144078 13900434499 正常的呼叫拆线(Clf) 14.9  23 2005-11-08 19:24:10 13464144133 13900434089 正常的呼叫拆线(Clf) 10.5  24 2005-11-08 19:24:51 13464144133 13900434245 正常的呼叫拆线(Clf) 6.2  25 2005-11-08 19:25:08 13464144133 13900434037 正常的呼叫拆线(Clf) 6.6  26 2005-11-08 19:38:34 13464304157 13900434211 正常的呼叫拆线(Clf) 6.9  27 2005-11-08 19:39:00 13464304157 13900434367 正常的呼叫拆线(Clf) 4  28 2005-11-08 19:39:39 13464304157 13900434107 正常的呼叫拆线(Clf) 2.4  29 2005-11-08 18:22:26 13464315572 13900434159 正常的呼叫拆线(Clf) 4.4  30 2005-11-08 18:15:15 13464323602 13900434263 正常的呼叫拆线(Clf) 6.5  31 2005-11-08 18:24:41 13464323602 13900434471 正常的呼叫拆线(Clf) 4.4  32 2005-11-08 19:15:59 13464323602 13900434055 正常的呼叫拆线(Clf) 4.5  33 2005-11-08 19:20:42 13464323602 13900434471 正常的呼叫拆线(Clf) 4.2  34 2005-11-08 19:25:09 13464323602 13900434471 正常的呼叫拆线(Clf) 4.1  35 2005-11-08 18:44:10 13464324241 13900434263 正常的呼叫拆线(Clf) 6  36 2005-11-08 19:47:08 13464453907 13900434419 正常的呼叫拆线(Clf) 4.1  37 2005-11-08 18:43:47 13464454450 13900434107 正常的呼叫拆线(Clf) 3.9  38 2005-11-08 19:19:11 13481974580 13900434445 正常的呼叫拆线(Clf) 9  39 2005-11-08 19:30:01 13500490625 13900434039 正常的呼叫拆线(Clf) 7.8  40 2005-11-08 19:30:53 13500490625 13900434039 正常的呼叫拆线(Clf) 5.1  41 2005-11-08 18:10:16 13500674362 13900434211 正常的呼叫拆线(Clf) 4.3  42 2005-11-08 18:11:45 13500674362 13900434315 正常的呼叫拆线(Clf) 6.8  43 2005-11-08 18:13:37 13500674362 13900434055 正常的呼叫拆线(Clf) 4.2  44 2005-11-08 19:26:42 13500674362 13900434211 正常的呼叫拆线(Clf) 6.1  45 2005-11-08 19:27:34 13500674362 13900434263 正常的呼叫拆线(Clf) 4  46 2005-11-08 18:27:59 13502158461 13900434311 正常的呼叫拆线(Clf) 3.5  47 2005-11-08 18:47:31 13504104526 13900434313 正常的呼叫拆线(Clf) 7.4  48 2005-11-08 18:15:06 13504843509 13900434457 正常的呼叫拆线(Clf) 14.2  49 2005-11-08 18:49:04 13514165235 13900434263 正常的呼叫拆线(Clf) 4.1  50 2005-11-08 18:26:02 13514165454 13900434263 正常的呼叫拆线(Clf) 6  51 2005-11-08 18:27:43 13514165454 13900434055 正常的呼叫拆线(Clf) 4  52 2005-11-08 18:52:24 13514871599 13900434315 正常的呼叫拆线(Clf) 6.4  53 2005-11-08 18:54:26 13514871599 13900434315 正常的呼叫拆线(Clf) 3.9  54 2005-11-08 18:58:28 13514871599 13900434107 正常的呼叫拆线(Clf) 6.4  55 2005-11-08 19:00:09 13514871599 13900434315 正常的呼叫拆线(Clf) 4.1  56 2005-11-08 19:01:29 13514871599 13900434211 正常的呼叫拆线(Clf) 6.6  57 2005-11-08 19:07:40 13514871599 13900434107 正常的呼叫拆线(Clf) 4  58 2005-11-08 19:08:13 13514871599 13900434211 正常的呼叫拆线(Clf) 7.5  59 2005-11-08 19:08:53 13514871599 13900434107 正常的呼叫拆线(Clf) 6.8  60 2005-11-08 19:09:31 13514871599 13900434211 正常的呼叫拆线(Clf) 6.2  61 2005-11-08 19:10:01 13514871599 13900434263 正常的呼叫拆线(Clf) 6.5  62 2005-11-08 19:14:57 13514871599 13900434367 正常的呼叫拆线(Clf) 4.1  63 2005-11-08 19:21:26 13514871599 13900434159 正常的呼叫拆线(Clf) 4.3  64 2005-11-08 19:22:15 13514871599 13900434211 正常的呼叫拆线(Clf) 4.2  65 2005-11-08 19:22:59 13514871599 13900434263 正常的呼叫拆线(Clf) 4  66 2005-11-08 19:25:20 13514871599 13900434419 正常的呼叫拆线(Clf) 6.2  67 2005-11-08 19:25:59 13514871599 13900434211 正常的呼叫拆线(Clf) 4.2  68 2005-11-08 19:27:10 13514871599 13900434263 正常的呼叫拆线(Clf) 6.1  69 2005-11-08 19:32:26 13514871599 13900434367 正常的呼叫拆线(Clf) 5.6  70 2005-11-08 19:56:35 13585910005 13900434062 正常的呼叫拆线(Clf) 18.8  71 2005-11-08 18:42:57 13586815456 13900434472 正常的呼叫拆线(Clf) 2.1  72 2005-11-08 18:30:38 13591257487 13900434419 正常的呼叫拆线(Clf) 5.7  73 2005-11-08 19:27:42 13591257937 13900434211 正常的呼叫拆线(Clf) 4.5  74 2005-11-08 19:44:43 13591257937 13900434107 正常的呼叫拆线(Clf) 4.2  75 2005-11-08 19:06:18 13591276400 13900434211 正常的呼叫拆线(Clf) 5  76 2005-11-08 18:47:48 13596958777 13900434182 正常的呼叫拆线(Clf) 9.9  77 2005-11-08 19:16:42 13604239845 13900434307 正常的呼叫拆线(Clf) 1.4  78 2005-11-08 18:21:53 13604968851 13900434003 正常的呼叫拆线(Clf) 6.1  79 2005-11-08 19:28:07 13604968851 13900434367 正常的呼叫拆线(Clf) 4.3  80 2005-11-08 19:30:36 13604968851 13900434315 正常的呼叫拆线(Clf) 6.9  81 2005-11-08 19:31:37 13604968851 13900434315 正常的呼叫拆线(Clf) 4.8  82 2005-11-08 19:13:15 13609852584 13900434367 正常的呼叫拆线(Clf) 3.9  83 2005-11-08 19:14:44 13609852584 13900434471 正常的呼叫拆线(Clf) 3.9  84 2005-11-08 19:16:23 13609852584 13900434367 正常的呼叫拆线(Clf) 3.9  85 2005-11-08 19:35:46 13609852584 13900434107 正常的呼叫拆线(Clf) 4.2  86 2005-11-08 18:13:47 13624444668 13900434088 正常的呼叫拆线(Clf) 2.4  87 2005-11-08 19:31:50 13634939451 13900434355 正常的呼叫拆线(Clf) 5.5  88 2005-11-08 18:55:32 13634944754 13900434315 正常的呼叫拆线(Clf) 6.1  89 2005-11-08 18:56:53 13634944754 13900434263 正常的呼叫拆线(Clf) 3.9  90 2005-11-08 19:14:21 13634944754 13900434471 正常的呼叫拆线(Clf) 4.3  91 2005-11-08 19:26:24 13664680753 13900434425 正常的呼叫拆线(Clf) 8.7  92 2005-11-08 18:31:12 13681130064 13900434357 正常的呼叫拆线(Clf) 17.7  93 2005-11-08 18:34:44 13681130064 13900434253 正常的呼叫拆线(Clf) 5.5  94 2005-11-08 18:40:32 13681130064 13900434201 正常的呼叫拆线(Clf) 4.7  95 2005-11-08 18:50:40 13695407831 13900434244 正常的呼叫拆线(Clf) 5.6  96 2005-11-08 19:12:06 13700062206 13900434211 正常的呼叫拆线(Clf) 3.9  97 2005-11-08 19:48:02 13700162123 13900434315 正常的呼叫拆线(Clf) 3.8  98 2005-11-08 19:50:24 13700162123 13900434263 正常的呼叫拆线(Clf) 4  99 2005-11-08 19:51:38 13700162123 13900434211 正常的呼叫拆线(Clf) 4.4  100 2005-11-08 18:31:09 13701362811 13900434400 正常的呼叫拆线(Clf) 3.8  101 2005-11-08 19:34:55 13704768577 13900434397 正常的呼叫拆线(Clf) 5.3  102 2005-11-08 18:32:08 13704902334 13900434233 正常的呼叫拆线(Clf) 49.4  103 2005-11-08 18:34:56 13704902334 13900434389 正常的呼叫拆线(Clf) 4.1  104 2005-11-08 18:41:30 13704902334 13900434441 正常的呼叫拆线(Clf) 19.4  105 2005-11-08 18:41:21 13704913783 13900434340 正常的呼叫拆线(Clf) 18.7  106 2005-11-08 18:31:41 13722355295 13900434487 正常的呼叫拆线(Clf) 5.3  107 2005-11-08 18:29:08 13784160779 13900434032 正常的呼叫拆线(Clf) 5  108 2005-11-08 18:25:27 13789502526 13900434122 正常的呼叫拆线(Clf) 9.8  109 2005-11-08 18:20:52 13796719894 13900434084 正常的呼叫拆线(Clf) 5.5  110 2005-11-08 19:06:00 13804164454 13900434003 正常的呼叫拆线(Clf) 4.1  111 2005-11-08 18:48:10 13804997562 13900434217 正常的呼叫拆线(Clf) 25.8  112 2005-11-08 18:00:35 13833478326 13900434159 正常的呼叫拆线(Clf) 4.3  113 2005-11-08 18:06:38 13839566209 13900434498 正常的呼叫拆线(Clf) 5.1  114 2005-11-08 18:25:44 13840283544 13900434315 正常的呼叫拆线(Clf) 4  115 2005-11-08 19:21:54 13840602205 13900434263 正常的呼叫拆线(Clf) 4  116 2005-11-08 18:06:31 13840623672 13900434315 正常的呼叫拆线(Clf) 3.9  117 2005-11-08 19:42:30 13840623672 13900434159 正常的呼叫拆线(Clf) 4.6  118 2005-11-08 19:34:39 13840944654 13900434326 正常的呼叫拆线(Clf) 8.6  119 2005-11-08 18:35:34 13841040590 13900434113 正常的呼叫拆线(Clf) 9.5  120 2005-11-08 19:55:47 13841265839 13900434449 正常的呼叫拆线(Clf) 4  121 2005-11-08 19:56:04 13841265839 13900434449 正常的呼叫拆线(Clf) 3.1  122 2005-11-08 19:38:51 13841605004 13900434003 正常的呼叫拆线(Clf) 4.1  123 2005-11-08 19:41:49 13841605004 13900434055 正常的呼叫拆线(Clf) 4.1  124 2005-11-08 19:44:19 13841605004 13900434211 正常的呼叫拆线(Clf) 4.3  125 2005-11-08 19:45:56 13841605004 13900434315 正常的呼叫拆线(Clf) 2.5  126 2005-11-08 19:09:56 13841655202 13900434107 正常的呼叫拆线(Clf) 4.1  127 2005-11-08 18:57:28 13841874909 13900434471 正常的呼叫拆线(Clf) 6.7  128 2005-11-08 18:55:45 13842675529 13900434475 正常的呼叫拆线(Clf) 1.9  129 2005-11-08 19:01:49 13843494621 13900434413 正常的呼叫拆线(Clf) 19.9  130 2005-11-08 18:59:13 13844420588 13900434303 正常的呼叫拆线(Clf) 1  131 2005-11-08 18:49:29 13846763314 13900434409 正常的呼叫拆线(Clf) 25.5  132 2005-11-08 18:34:11 13848477101 13900434211 正常的呼叫拆线(Clf) 4.5  133 2005-11-08 18:35:22 13848477101 13900434367 正常的呼叫拆线(Clf) 4.5  134 2005-11-08 18:36:44 13848477101 13900434107 正常的呼叫拆线(Clf) 4.2  135 2005-11-08 18:03:13 13848574831 13900434419 正常的呼叫拆线(Clf) 4  136 2005-11-08 19:26:10 13848574831 13900434315 正常的呼叫拆线(Clf) 5.8  137 2005-11-08 19:26:30 13848574831 13900434159 正常的呼叫拆线(Clf) 4.1  138 2005-11-08 19:49:10 13848574831 13900434107 正常的呼叫拆线(Clf) 2.8  139 2005-11-08 18:16:13 13848674967 13900434471 正常的呼叫拆线(Clf) 4.3  140 2005-11-08 18:17:15 13848674967 13900434471 正常的呼叫拆线(Clf) 6.7  141 2005-11-08 18:54:12 13848674967 13900434315 正常的呼叫拆线(Clf) 3.8  142 2005-11-08 18:55:10 13848674967 13900434003 正常的呼叫拆线(Clf) 4  143 2005-11-08 18:56:17 13848674967 13900434471 正常的呼叫拆线(Clf) 6  144 2005-11-08 18:56:43 13848674967 13900434055 正常的呼叫拆线(Clf) 4  145 2005-11-08 18:57:35 13848674967 13900434315 正常的呼叫拆线(Clf) 6.6  146 2005-11-08 18:59:12 13848674967 13900434471 正常的呼叫拆线(Clf) 6.5  147 2005-11-08 19:00:23 13848674967 13900434107 正常的呼叫拆线(Clf) 4.1  148 2005-11-08 19:00:38 13848674967 13900434055 正常的呼叫拆线(Clf) 4  149 2005-11-08 19:00:50 13848674967 13900434107 正常的呼叫拆线(Clf) 10.3  150 2005-11-08 19:01:44 13848674967 13900434315 正常的呼叫拆线(Clf) 6.4  151 2005-11-08 19:02:01 13848674967 13900434159 正常的呼叫拆线(Clf) 4.2  152 2005-11-08 19:03:38 13848674967 13900434003 正常的呼叫拆线(Clf) 4  153 2005-11-08 19:03:51 13848674967 13900434159 正常的呼叫拆线(Clf) 4  154 2005-11-08 19:05:33 13848674967 13900434055 正常的呼叫拆线(Clf) 5.5  155 2005-11-08 19:06:41 13848674967 13900434211 正常的呼叫拆线(Clf) 5.3  156 2005-11-08 19:07:18 13848674967 13900434159 正常的呼叫拆线(Clf) 5.3  157 2005-11-08 19:07:30 13848674967 13900434263 正常的呼叫拆线(Clf) 5.4  158 2005-11-08 19:08:30 13848674967 13900434263 正常的呼叫拆线(Clf) 4  159 2005-11-08 19:09:38 13848674967 13900434471 正常的呼叫拆线(Clf) 6.4  160 2005-11-08 19:11:15 13848674967 13900434367 正常的呼叫拆线(Clf) 6  161 2005-11-08 19:13:01 13848674967 13900434367 正常的呼叫拆线(Clf) 5.5  162 2005-11-08 19:13:31 13848674967 13900434315 正常的呼叫拆线(Clf) 5.9  163 2005-11-08 19:14:06 13848674967 13900434315 正常的呼叫拆线(Clf) 6.7  164 2005-11-08 19:16:11 13848674967 13900434419 正常的呼叫拆线(Clf) 6.2  165 2005-11-08 19:16:26 13848674967 13900434419 正常的呼叫拆线(Clf) 7.1  166 2005-11-08 19:17:01 13848674967 13900434003 正常的呼叫拆线(Clf) 6  167 2005-11-08 19:17:28 13848674967 13900434211 正常的呼叫拆线(Clf) 6.1  168 2005-11-08 19:17:43 13848674967 13900434263 正常的呼叫拆线(Clf) 4.2  169 2005-11-08 19:18:17 13848674967 13900434315 正常的呼叫拆线(Clf) 4.1  170 2005-11-08 19:19:35 13848674967 13900434003 正常的呼叫拆线(Clf) 3.9  171 2005-11-08 19:19:59 13848674967 13900434107 正常的呼叫拆线(Clf) 3.9  172 2005-11-08 19:20:54 13848674967 13900434003 正常的呼叫拆线(Clf) 3.9  173 2005-11-08 19:21:17 13848674967 13900434419 正常的呼叫拆线(Clf) 4  174 2005-11-08 19:22:00 13848674967 13900434055 正常的呼叫拆线(Clf) 5  175 2005-11-08 19:24:16 13848674967 13900434471 正常的呼叫拆线(Clf) 6.3  176 2005-11-08 19:53:55 13848753839 13900434179 正常的呼叫拆线(Clf) 3.9  177 2005-11-08 19:54:17 13848753839 13900434231 正常的呼叫拆线(Clf) 11.3  178 2005-11-08 18:11:30 13856293126 13900434412 正常的呼叫拆线(Clf) 30  179 2005-11-08 19:40:14 13888732865 13900434198 正常的呼叫拆线(Clf) 4.8  180 2005-11-08 18:58:31 13889228847 13900434004 正常的呼叫拆线(Clf) 71.8  181 2005-11-08 18:11:34 13894419898 13900434104 正常的呼叫拆线(Clf) 14.9  182 2005-11-08 19:13:25 13897823889 13900434055 正常的呼叫拆线(Clf) 3.8  183 2005-11-08 19:39:08 13897823889 13900434471 正常的呼叫拆线(Clf) 4.1  184 2005-11-08 19:30:30 13897830997 13900434159 正常的呼叫拆线(Clf) 6  185 2005-11-08 18:42:36 13897837311 13900434211 正常的呼叫拆线(Clf) 3.8  186 2005-11-08 18:46:28 13897848736 13900434367 正常的呼叫拆线(Clf) 4.2  187 2005-11-08 18:30:50 13897876843 13900434367 正常的呼叫拆线(Clf) 4.2  188 2005-11-08 18:31:41 13897876843 13900434211 正常的呼叫拆线(Clf) 4.7  189 2005-11-08 18:44:09 13898292034 13900434257 正常的呼叫拆线(Clf) 50.1  190 2005-11-08 18:09:57 13898590678 13900434142 正常的呼叫拆线(Clf) 12.7  191 2005-11-08 18:55:57 13909827284 13900434107 正常的呼叫拆线(Clf) 4  192 2005-11-08 18:25:28 13917827991 13900434053 正常的呼叫拆线(Clf) 6.5  193 2005-11-08 18:26:28 13917827991 13900434469 正常的呼叫拆线(Clf) 4.3  194 2005-11-08 18:31:34 13933539170 13900434263 正常的呼叫拆线(Clf) 4.3  195 2005-11-08 18:11:01 13940608670 13900434367 正常的呼叫拆线(Clf) 3.9  196 2005-11-08 19:08:48 13940616057 13900434159 正常的呼叫拆线(Clf) 4.3  197 2005-11-08 18:38:49 13940639144 13900434471 正常的呼叫拆线(Clf) 4  198 2005-11-08 18:15:57 13941610611 13900434419 正常的呼叫拆线(Clf) 4  199 2005-11-08 19:50:12 13941610611 13900434367 正常的呼叫拆线(Clf) 4.2  200 2005-11-08 18:16:17 13941623445 13900434471 正常的呼叫拆线(Clf) 6.1  201 2005-11-08 18:24:02 13941623445 13900434315 正常的呼叫拆线(Clf) 6.1  202 2005-11-08 18:25:09 13941623445 13900434003 正常的呼叫拆线(Clf) 5.7  203 2005-11-08 18:28:00 13941623445 13900434159 正常的呼叫拆线(Clf) 4.4  204 2005-11-08 19:31:03 13941623822 13900434107 正常的呼叫拆线(Clf) 5.5  205 2005-11-08 19:32:03 13941623822 13900434159 正常的呼叫拆线(Clf) 6.6  206 2005-11-08 19:53:11 13941624119 13900434107 正常的呼叫拆线(Clf) 4.1  207 2005-11-08 18:16:52 13941624429 13900434367 正常的呼叫拆线(Clf) 4  208 2005-11-08 18:24:46 13941624429 13900434003 正常的呼叫拆线(Clf) 6.3  209 2005-11-08 18:25:57 13941624429 13900434367 正常的呼叫拆线(Clf) 5.3  210 2005-11-08 18:28:18 13941624429 13900434159 正常的呼叫拆线(Clf) 6.5  211 2005-11-08 18:30:14 13941624429 13900434263 正常的呼叫拆线(Clf) 4.2  212 2005-11-08 18:31:06 13941624429 13900434263 正常的呼叫拆线(Clf) 4  213 2005-11-08 18:14:40 13941634314 13900434367 正常的呼叫拆线(Clf) 4.2  214 2005-11-08 18:49:35 13941634314 13900434055 正常的呼叫拆线(Clf) 6.3  215 2005-11-08 18:00:53 13941663061 13900434471 正常的呼叫拆线(Clf) 4.2  216 2005-11-08 18:02:17 13941663061 13900434055 正常的呼叫拆线(Clf) 4.2  217 2005-11-08 18:32:29 13941663061 13900434003 正常的呼叫拆线(Clf) 6.6  218 2005-11-08 19:22:24 13941665824 13900434471 正常的呼叫拆线(Clf) 3.8  219 2005-11-08 19:23:49 13941665824 13900434211 正常的呼叫拆线(Clf) 3.8  220 2005-11-08 18:08:04 13941693266 13900434003 正常的呼叫拆线(Clf) 3.9  221 2005-11-08 18:56:57 13941693266 13900434471 正常的呼叫拆线(Clf) 7.2  222 2005-11-08 18:57:23 13941693266 13900434471 正常的呼叫拆线(Clf) 4  223 2005-11-08 19:45:28 13941693266 13900434419 正常的呼叫拆线(Clf) 4.2  224 2005-11-08 18:01:44 13941771702 13900434419 正常的呼叫拆线(Clf) 4  225 2005-11-08 18:36:58 13941771702 13900434419 正常的呼叫拆线(Clf) 4.1  226 2005-11-08 18:06:49 13943974860 13900434462 正常的呼叫拆线(Clf) 4.2  227 2005-11-08 18:08:24 13944485204 13900434410 正常的呼叫拆线(Clf) 4.9  228 2005-11-08 18:23:14 13947772383 13900434419 正常的呼叫拆线(Clf) 5.8  229 2005-11-08 18:25:04 13947772383 13900434263 正常的呼叫拆线(Clf) 4.2  230 2005-11-08 18:30:34 13947772383 13900434055 正常的呼叫拆线(Clf) 4.1  231 2005-11-08 18:53:36 13947772383 13900434471 正常的呼叫拆线(Clf) 4.4  232 2005-11-08 18:55:18 13947772383 13900434471 正常的呼叫拆线(Clf) 4.1  233 2005-11-08 18:56:06 13947772383 13900434367 正常的呼叫拆线(Clf) 4.3  234 2005-11-08 18:57:50 13947772383 13900434107 正常的呼叫拆线(Clf) 7  235 2005-11-08 18:59:01 13947772383 13900434003 正常的呼叫拆线(Clf) 4.4  236 2005-11-08 19:29:11 13947772383 13900434003 正常的呼叫拆线(Clf) 5.8  237 2005-11-08 19:31:47 13947772383 13900434263 正常的呼叫拆线(Clf) 3.8  238 2005-11-08 19:33:14 13947772383 13900434419 正常的呼叫拆线(Clf) 5  239 2005-11-08 19:36:21 13947772383 13900434471 正常的呼叫拆线(Clf) 4.3  240 2005-11-08 18:57:59 13948854865 13900434213 正常的呼叫拆线(Clf) 4.8  241 2005-11-08 19:07:03 13998438583 13900434356 正常的呼叫拆线(Clf) 3.4  242 2005-11-08 19:07:32 13998438583 13900434252 正常的呼叫拆线(Clf) 3.1  243 2005-11-08 19:07:43 13998438583 13900434044 正常的呼叫拆线(Clf) 3.2  244 2005-11-08 19:07:56 13998438583 13900434096 正常的呼叫拆线(Clf) 3.5  245 2005-11-08 19:07:33 13998872636 13900434271 正常的呼叫拆线(Clf) 7.3  246 2005-11-08 18:51:28 13998973939 13900434471 正常的呼叫拆线(Clf) 6.5  247 2005-11-08 18:51:53 13998973939 13900434263 正常的呼叫拆线(Clf) 3.9  248 2005-11-08 19:38:22 13998973939 13900434315 正常的呼叫拆线(Clf) 3.9   从上表的共248次(2小时)的呼损中,仅号码13848674967就有36次,两小时的总共的试呼次数不过5100多次,因此这个呼损是系统接通率指标下降的根本原因。 USER NO RESPONDING(用户无响应) ISUP信令过程: 17:47:17.758.866 CCH2: CCA1 ISUP_IAM ( 13552632957 -> 13900434208 ) 17:47:23.843.315 CCA1: CCH1 ISUP_REL ( 用户未响应 ) 17:47:23.990.111 CCH2: CCA1 ISUP_RLC 详细信息:  A+信令过程: +--------------------+--------------+--------------+----------------+ |Long Time |Last Prot |Last MSG |Calling Party | +--------------------+--------------+--------------+----------------+ |17:43:22,832,959 |DTAP |PAGRES LAC=17217 CELL=1092 |17:43:22,922,247 |SCCP |CC |17:43:23,061,815 |BSSM |CLUPD |17:43:23,291,810 |BSSM |CLUPD |17:43:24,195,698 |DTAP |SETUP 13552632957 |17:43:29,349,803 |DTAP |DISC CAUSE=Recovery on timer expiry |17:43:29,972,752 |BSSM |CLREQ |17:43:30,022,037 |BSSM |CLCMD |17:43:30,049,235 |BSSM |CLCMP |17:43:30,087,540 |SCCP |RLSD |17:43:30,112,608 |SCCP |RLC 详细的信令流程:  在A+口的信令中,我们可以看出:MSC下发SETUP之后,等待BSC返回CALL-CONF消息,在等待了5秒钟后(T303超时),由MSC发起了DISC消息。这种情况需要无线侧进行更为具体的分析,与交换侧无关。 呼叫拒收(CALL REJECT 21) a) case 1 ISUP信令过程: 17:45:05.754.560 ISUP_IAM ( 13840146313 -> 13900434184 ) 17:45:07.646.763 ISUP_ACM 17:45:09.092.610 ISUP_CPG 17:45:21.164.009 ISUP_REL ( Call Rejected ) (MSC-(A局) 17:45:21.271.571 ISUP_RLC 详细信令:  A+信令流程: +--------------------------+---------------+---------------------+ |Long Time |Last Prot |Last MSG | +--------------------------+---------------+---------------------+ |17:41:10,859,706 |DTAP |PAGRES LAC=17217,CELL=1083 (BSC1) |17:41:10,964,213 |SCCP |CC |17:41:11,100,329 |BSSM |CLUPD |17:41:11,328,946 |BSSM |CLUPD |17:41:12,779,429 |DTAP |SETUP |17:41:13,162,326 |DTAP |CCONF |17:41:13,345,805 |BSSM |ASREQ |17:41:14,285,671 |BSSM |ASCMP |17:41:14,400,425 |DTAP |ALERT |17:41:18,385,535 |BSSM |HORQD LAC=17217,CELL=7362 (切出请求1) CAUSE=Downlink strength(BTS信号太弱) |17:41:18,832,962 |BSSM |HORRJ CAUSE=No radio resource available(被拒绝) MSC(BSC |17:41:18,868,031 |BSSM |HORQD LAC=17217,CELL=7413 (切出请求2) |17:41:19,366,204 |BSSM |HORRJ CAUSE=No radio resource available(被拒绝) |17:41:26,534,128 |DTAP |DISC CAUSE= Call rejected (BSC(MSC) |17:41:26,598,835 |DTAP |RELEAS |17:41:26,843,486 |DTAP |RELCMP |17:41:26,888,334 |BSSM |CLCMD |17:41:27,243,849 |BSSM |CLCMP |17:41:27,278,069 |SCCP |RLSD |17:41:27,303,871 |SCCP |RLC 详细的信令流程: 从A+信令中我们可以看出,ALERT后进行切出请求,两次被拒绝,原因是没有无线资源,然后BSC发起了DISC消息,这种情况非用户原因引起,因此计入了呼损项。 小区7362和7413都归属于BSC7(诺基亚BSC),是1800M的BTS,这种情况涉及到900M与1800M的切换,建议无线侧对切换关系等进行检查。 MSC收到BSC的HANDOVER REQUIRED后要向BSC7发送handover request,如果bsc7的小区7362,7413没有配置小区1083的切换关系就会回送handover reject消息。但不排除其他可能。 case 2 isup信令过程: 17:47:10.042.305 ISUP_IAM ( 13526955228 -> 13900434151 ) 17:47:12.436.886 ISUP_ACM 17:47:20.511.407 ISUP_REL ( Call Rejected ) 17:47:20.694.020 ISUP_RLC 详细的信令流程: a接口的信令流程: +-----------------------+---------------+--------------------- |Long Time |Last Prot |Last MSG +-----------------------+---------------+----------------------- |17:43:15,075,174 |DTAP |PAGRES LAC=17217 ,CELL=3721 |17:43:15,208,697 |SCCP |CC |17:43:15,283,425 |BSSM |CLUPD |17:43:15,523,122 |BSSM |CLUPD |17:43:16,429,247 |DTAP |SETUP |17:43:16,677,106 |DTAP |CCONF |17:43:16,851,368 |BSSM |ASREQ |17:43:17,791,230 |BSSM |ASCMP |17:43:17,901,481 |DTAP |ALERT |17:43:23,407,565 |BSSM |HOPER (BSC内部切换)LAC=17217,CELL=1043 |17:43:25,968,726 |DTAP |DISC CAUSE= Call rejected ( BSC->MSC) |17:43:26,012,133 |DTAP |RELEAS 释放TCH话路 |17:43:26,227,717 |DTAP |RELCMP |17:43:26,273,886 |BSSM |CLCMD |17:43:26,646,961 |BSSM |CLCMP |17:43:26,677,743 |SCCP |RLSD |17:43:26,702,834 |SCCP |RLC 详细的呼叫流程:  从上述流程可以看出,在振铃后6秒后,发起了BSC内部的切换,两秒后BSC发起了DISC。结合GSM对这种CAUSE的定义,可以看出这种情况的呼损是由无线侧原因引起的。这种情况同样涉及切换,只是这次为BSC内部切换,不需要MSC进行参与,但从信令上看切换没有成功,从而引起会引起这种呼损。 H.1.9 Cause No. 21 "call rejected" This cause indicates that the equipment sending this cause does not wish to accept this call, although it could have accepted the call because the equipment sending this cause is neither busy nor incompatible. 临时故障(CAUSE=41) a)、case1 ISUP信令过程: 17:57:41.402.562 ISUP_IAM ( 4105172177 -> 13900434438 ) 17:57:45.074.846 ISUP_REL ( Temporary Fault ) 17:57:45.206.743 ISUP_RLC 详细的信令流程: 对应的A接口流程: +--------------------------+---------------------+---------------------+ |Long Time |Last Prot |Last MSG | +--------------------------+---------------------+---------------------+ |17:53:46,540,928 |DTAP |PAGRES LAC=17217 CELL=3353 |17:53:46,640,468 |SCCP |CC |17:53:46,759,812 |BSSM |CLUPD |17:53:47,008,931 |BSSM |CLUPD |17:53:47,740,074 |DTAP |SETUP |17:53:48,137,800 |DTAP |CCONF |17:53:48,268,952 |BSSM |ASREQ |17:53:50,521,781 |BSSM |ASFAI CAUSE= Radio Interface fail/reversion (BSC(MSC) |17:53:50,604,164 |DTAP |DISC CAUSE=Temporary failure(MSC->BSC) |17:53:50,956,158 |DTAP |RELEAS |17:53:50,988,912 |DTAP |RELCMP |17:53:50,992,409 |BSSM |CLCMD |17:53:51,031,649 |BSSM |CLCMP |17:53:51,058,168 |SCCP |RLSD |17:53:51,082,161 |SCCP |RLC A接口信令流程: 从信令流程上可以看出,这种情况的原因是无线接口原因,从下面的另外两个CASE上也可以验证(由于情况完全相同,不再详细描述),详见下面附件:  后两个case中主叫号码相同,被叫小区都是:LAC=17217,CELL=1122,建议无线侧检查该BTS是否存在TCH拥塞现象。 综合以上四种呼损情况,我们可以看出系统接通率指标是无线网络状况的直接反映,正常释放(CAUSE=16)受用户行为(主叫回拨业务)和网络状况影响。四平地区受主叫回拨业务的影响分析如下: 对11月7日-11月12日的忙时的这项呼损以及相应的系统接通率对比如下: 图二  图三 从图三可以看出最近一周的晚忙时系统接通率上升明显,早忙时基本稳定,结合图二正常释放的呼损在晚忙时的比例很高,波动高于早忙时2%左右,因此对晚忙时的系统接通率影响很大,但近期这项互损逐渐减少,趋于稳定,因此12日,13日的晚忙时指标较好。 由于正常释放的呼损受主叫回拨业务的影响较大,有时达到5%以上,高于正常值3%,因此直接将接通率拉下3个百分点。建议局方加大主叫回拨业务的调查力度,及时向有关部门反映,加大对这种SIM卡的清查力度。 宋世军 2005年11月13日