路测信令分析 Version 1.0 目 录

§1 信令ID解释 3 §1.1 DT信令中ID解释 4 §1.2几个主要ID的字段解释 4 §2 正常信令流程 7

§2.1呼叫建立及主叫释放信令流程 7 §2.2被叫信令流程 16 §2.3开机位置更新信令流程 18 §2.4跨越LAC区位置更新信令流程 19 §2.5切换信令流程 21 §2.5.1同步切换信令流程 21 §2.5.2非同步切换信令流程 22 §3异常信令流程 24

§3.1由设备原因引起呼叫建立失败信令流程 24 §3.2被叫做位置更新造成主叫呼叫建立失败信令流程 24 §3.3由于拥塞造成的呼叫建立失败信令流程 26

§3.4由于被叫鉴权被拒绝造成主叫呼叫建立失败信令流程 26 §3.5无线链路超时造成掉话信令流程 28 §3.6切换失败信令流程 31

§1信令ID解释 §1.1 DT信令中ID解释 ID TITTLE MARK

AQDL Downlink Audio Quality MOS值 AQI Audio Quality Information MOS信息 CAA Call Attempt 呼叫尝试

CAC Call Connect Success 呼叫成功 CAD Call Disconnect 通话结束 CAI Incoming Call 呼入 CAF Call Failed 呼叫失败 CHI Channel Info 信道信息 CI Carrier Interference C/I，载干比 CREL Cell Reselection 小区重选

DSC Downlink Signaling Counter 下行信令计数 ERXL Enhanced RX Level 增强型电平 FER Frame. Error Rate 误帧率 HOA Handover Attempt 切换尝试 HOF Handover Failure 切换失败

HOP Frequency Hopping Status 跳频状态 HOS Handover Success 切换成功 L2D Layer 2 Downlink 第二层下行信令 L2U Layer 2 Uplink 第二层上行信令 L3D Layer 3 Downlink 第三层下行信令 L3U Layer 3 Uplink 第三层上行信令 LUA Location Update Attempt 位置更新尝试 LUS Location Update Accepted 位置更新成功 LUF Location Update Failure 位置更新失败 MSP MS Power 手机功率 NLIST Neighbor List 邻区列表

PCHI Packet Channel Info GPRS信道信息 RLT Radio Link Timeout 无线链路超时 RXL RX Level 电平

RXQ RX Quality 通话质量 SEI Service Information 服务信息 TAD Timing Advance TA值 TBFI TBF Information

§1.2几个主要ID的解释

1 AQDL (Downlink Audio Quality) 2 3.6 Audio Quality Mean: 3.3 MOS值 第二项 2 AQI(Audio Quality Information) 3 -1 1 Sync Status: Synchronized 第三项 1 同步 0 不同步

3 CAD(Call Disconnect) 1 114 16 1 16

Status CC Cause 1 = Normal disconnect

2 = Dropped call. (i.e., network release) 3 = Dropped out of service.

4 = Dropped during handover/handoff/hard handover 5 = Reserved (保留字段),例如:测试设备原因 6 = Transfer timeout during data or fax test call 7 = Protocol error during data or fax test call 8 = Transfer failed during data or fax test call 9 = Modem connection failure.

Dedicated connection already achieved

10= Network busy (GSM) When network has not sent ALERT or CONNECT message before it sends DISCONNECT message

11 = Voice quality synchronization lost 1 Unassigned (unallocated number) 3 No route to destination 6 Channel unacceptable 8 Operator determined barring 16 Normal clearing

17 User busy

18 No user responding 19 User alerting, no answer 21 Call rejected 22 Number changed

26 Non selected user clearing 27 Destination out of order

28 Invalid number format (incomplete number) 29 Facility rejected

30 Response to STATUS ENQUIRY 31 Normal, unspecified 34 No circuit/channel available 38 Network out of order 41 Temporary failure

42 Switching equipment congestion 43 Access information discarded

44 Requested circuit/Channel not available 47 Resources unavailable, unspecified 49 Quality of service unavailable 50 Requested facility not subscribed 55 Incoming calls barred within the CUG 57 Bearer capability not authorized 58 Bearer capability not presently available 63 Sevice or option not available, unspecified 65 Bearer service not implemented 69 Requested facility not implemented 70 Only restricted digital information bearer capability is available

79 Service or option not implemented, unspecified 81 Invalid transaction indentifier value 87 User not member of CUG 88 Incompatible destination

91 Invalid transit network selection

95 Semantically incorrect message NEMO TECHNOLOGIES 233 96 Invalid mandatory information 97 Message type not non-existent

98 Message type not compatible with protocol state 99 Information element non existent or not implemented 100 Conditional IE error

101 Message not compatible with protocol state 102 Recovery on timer expiry 111 Protocol error, unspecified 127 Interworking, unspecified

4 CAF(Call Failed) 5 2 -1

State: Test system failure,参考CAD(Call Disconnect) 第一项 OS RAS Cause: n/a

5 CHI(Channel Info 信道信息) 1 2 74 41791 14101 -1 1 64 13 5 74 1 2 74 41791 14101 -1 1 64 13 5 74

Channel Type Carrier Number Cell Id LAC RLT Extended Channel Type Timeslot BCCH 1 = control channel 2 = traffic channel 载频

频点 小区 位置区 -1 = Not Available 1 = BCCH 2 = CCCH 3 = CBCH 4 = SDCCH 5 = RACH

10 = TCH half rate, first half 11 = TCH half rate, second half 12 = TCH full rate