信令流程.ppt

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信令流程 主叫流程（一） MS BSC Channel activation ack Channel activation Encryption command Channel required Complete Layer 3 Info. Authentication request Call proceeding Cipher Mode Complete SABM(cm_serv_req) Immediate assign command establish indication BTS Channel request UA(cm_serv_req) Cipher Mode Command Immediate assignment MSC Authentication response Setup Cipher Mode Command Cipher Mode Complete 主叫流程（二） MS BSCBTS MSC Assignment Request Channel activation ack Assignment command establish indication Assignment Complete Assignment Complete Deactivate SACCH Release request Release confirm RF Channle release RF Channel release ack Alerting Connect Connect acknowledge SABM UA Channel activation 主叫流程（三） MS BSCBTS MSC Channel Release Release Complete Release Clear Command RF Channle release DISC Deactivate SACCH RF Channel release ack Release Indication UA Disconnect Clear Complete 被叫流程（一） MS BSCBTS MSC Channel activation ack Channel activation Encryption command Channel required Complete Layer 3 Info. Authentication request Call confirm Cipher Mode Complete SABM(pag_resp) Immediate assign command establish indication Channel request UA(pag_resp) Cipher Mode Command Immediate assignment Authentication response Setup Cipher Mode Command Cipher Mode Complete Paging CommandPaging Request Paging 被叫流程（二） MS BSCBTS MSC Assignment Request Channel activation ack Assignment command establish indication Assignment Complete Assignment Complete Deactivate SACCH Release request Release confirm RF Channle release RF Channel release ack Alerting Connect Connect acknowledge SABM UA Channel activation 位置更新流程（一） MS BSC Channel activation ack Channel activation Encryption command Channel required Complete Layer 3 Info. Authentication request TMSI reallocation complete Cipher Mode Complete SABM(loc_upd_req) Immediate assign command establish indication BTS Channel request UA(loc_upd_req) Cipher Mode Command Immediate assignment MSC Authentication response Location updating accept Cipher Mode Command Cipher Mode Complete 位置更新流程（二） MS BSCBTS MSC Channel Release Clear Command RF Channle release DISC Deactivate SACCH RF Channel release ack Release Indication UA Clear Complete 切换流程 • 小区内切换流程 • 小区间切换流程 • 外部切换流程 小区内切换 MSC BTSBSC MS SABM(FACCH) Measurement result Channel activation ack Establish indication Release Confirmation Measurement report Assigment complete(FACCH) HO Performed RF Channel Release ACK Assigment command (FACCH) Release Request RF Channel Release Channel activation UA（FACCH） Receiver Ready(FACCH) 小区间切换 MS BSCBTS1 BTS2 Channel activation Channel activation ack Measurement result Handover command Measurement report Handover access Handover complete SABM UA Handover complete Handover performed(to msc) Physical information establish indication Handover detection Release Request Release Confirmation RF Channel Release ACK RF Channel Release 外部切换 MSMSC BSS2 BSS1 Measurement Report(SACCH) BTS2 BTS1 Measurement ResultHandover Required Handover Request Channel Activation Channel Activation ACK HO Request ACK Handover Command Handover Command(FACCH) Handover Access(FACCH) Handover DetectionHandover Detection Physical Information (FACCH) SABM (FACCH) Establish Indication UA (FACCH) Handover Complete (FACCH) Receiver Ready (FACCH) Handover Complete Handover Complete Clear Command Release Request Release Confirmation RF Channel Release RF CH Release ACKClear Command 短信发送流程（一） MS BSC Channel activation ack Channel activation Encryption command Channel required Complete Layer 3 Info. Authentication request Cipher Mode Complete SABM(cm_serv_req) Immediate assign command establish indication BTS Channel request UA(cm_serv_req) Cipher Mode Command Immediate assignment MSC Authentication response Cipher Mode Command Cipher Mode Complete SABM(SAPI=3) UA(SAPI=3) establish indication 短信发送流程（二） MS BSCBTS CP DATA ( MS TO SMC ) MSC CP ACK CP DATA ( SMC TO MS ) CP ACK Clear CommandChannel Release RF Channel release DISC Deactivate SACCH RF Channel release ack Release Indication UA Clear Complete 短信接收流程（一） MS BSCBTS MSC Channel activation ack Channel activation Encryption command Channel required Complete Layer 3 Info. Authentication request Cipher Mode Complete SABM(pag_resp) Immediate assign command establish indication Channel request UA(pag_resp) Cipher Mode Command Immediate assignment Authentication response Cipher Mode Command Cipher Mode Complete Paging CommandPaging Request Paging（SMC TO MS） SABM(SAPI=3) UA(SAPI=3) establish indication establish confirmation CP DATA （SMC TO MS） 短信接收流程（二） MS BSCBTS CP DATA ( SMC TO MS ) MSC CP ACK CP DATA ( MS TO SMC ) CP ACK Clear CommandChannel Release RF Channel release DISC Deactivate SACCH RF Channel release ack Release Indication UA Clear Complete 数据业务流程 MS HLRSGSN GGSN Attach Request Triplet request Authentication Updata Location Insert Subscriber Data Updata Location ACK Attach Accept Activate PDP Context Request Creat PDP Context Request Creat PDP Context Response Activate PDP Context Response 特殊流程 • 单、双频指示 • IMSI ATTACH / DETACH • 切换失败 单、双频指示 移动台单、双频指示 Classmark 3 Classmark 3 是在SYSTEM INFORMATION TYPE 4 中所包含的一个元素。用来指示 手机的单、双频状态。其定义情况如下所示： Multibands Supported ( 3 bit field) Band1 supported (third bit of the field) 0 P-GSM not supported 1 P-GSM supported Band2supported(second bit of the field) 0 E-GSM not supported 1 E-GSM supported Band3supported(first bit of the field ) 0 DCS1800 not supported 1 DCS1800 supported IMSI ATT / DETA 小区允许（禁止）ATTACH/DETACH的标记由小区在 SYSTEM INFORMATION TYPE 3 进行广播。其 定义情况如下所示： ATT,Attach-detach allowed (octet2) Bit 7. 0 MSs in the cell are not allowed to apply IMSI attach and detach procedure. 1 MSs in the cell shall apply IMSI attach and detach procedure. IMSI 的 附 着 是 由 移 动 用 户 送 位 置 更 新 请 求 来 消 除VLR 中 的 分 离 标 志， 从 而 恢复 该 用 户 的 正 常 呼 叫 处 理。 这 类 似 于 正 常 的 位 置 更 新。 但 请 求 的 类 型 为“IMSI ATTACH”。另 外，用 户 应 和 分 离 前 在 同 一 位 置 区 内， 否 则， 它 只 能 启 动一 般 的 位 置更 新过程。 IMSI的分离是由移动台发送“IMSI DETACH INDICATION ”，网络收 到‘IMSI 分 离’ 消 息 后 VLR 给 该 用 户 的 信 息 设 置 一 个‘IMSI 分 离’ 的 标 志。 并 启 动 IMSI 分 离 的 计 时 器“T3220”。计 时 器 超 时， 则 从VLR 中 删 除 该 用 户 的 信 息。 ‘IMSI 分 离’ 的 标 志 设 定 后，MSC 将 停 止 寻 呼 该 用 户， 尽 管 它 仍 然 在 自 己 的 管 辖 区 内。 切换失败 当移动台触发切换，在Handover Command 之后，由于各类原因致使移动台无法正 常进行切换信令流程，由移动台上行发送 Handover Failure 。指示切换失败，并在原 服务小区上保持通话。其信令流程如下所示： MS BSCBTS1 BTS2 Channel activation Channel activation ack Measurement result Handover command Measurement report Handover access Handover Failure