信令流程图1

切换流程: Assignment Command SABM Assignment Complete Assignment Failure Jason Wu Handover Recognized Handover Recognized Received Initiate Intra Cell HO HO_FAIL_NO_RESOURCE INTRA_CELL_HO_REQ OUT_INTRA_BSS_HO_REQ OUT_INTER_BSS_HO_REQ Start ho_allocation HO Resource Not Available Internal HO Assignment Start ho_ack Internal HO Initiated Internal HO Initiated Ack Stop ho_allocation and ask SM to update the TDM map Stop ho_ack Internal HO Assignment Ack Physical Context Request Physical Context Confirm Channel Activation Channel Activation Acknowledge Assignment Command INTRA_CELL_HO_ATTEMPT Start T10 MA_CMD_TO_MS Establish Indication Assignment Complete Stop T10 Assignment Successful Handover Performed Assignment Failure Stop T10 MA_FAIL_FROM_MS INTRA_CELL_HO_SUC INTRA_BSS_HO_CAUSE_SUC Unsuccessful Assignment If T10 expires INTRA_CELL_HO_RETURN INTRA_CELL_EQUIP_FAIL Radio Channel Released INTRA_CELL_HO_LOSTMS CLR_REQ_TO_MSC Internal HO request HO Channel Assigned Channel Activation Channel Activation Ack Start Timer HO_COMPLETE Start Timer ho_allocation Handover Allocation Stop timer ho_allocation IN_INTRA_BSS_NC_ATMPT Handover Procedure Page 1 4/16/2013 Initiate Handover Handover Command Handover Access Physical Info Handover Command Start T8 Start T3103 OUT_INTRA_BSS_HO_ATMPT OUT_HO_NC_CAUSE_ATMPT OUT_HO_CAUSE_ATMPT Max 4 times Handover Detection HO Detection Received Trans Req Switch Response Success Stop Timer HO_COMPLETE SABM UA HO Complete Establish Indication HO Complete HO Success Start Timer channel_teardown Stop T3103 Blast Stop T8 Deallocate Inactive DCH HO Performed IN_INTRA_BSS_HO_SUC OUT_INTRA_BSS_HO_SUC IN_INTRA_BSS_NC_SUC OUT_HO_NC_SUC INTRA_BSS_HO_SUC OUT_INTRA_BSS_HO_PRI_BLK Internal HO Request HO_FAIL_NO_RESOURCES HO Resource not Available Initiate Handover Handover Command Handover Failure Stop T8 Unsuccessful Handover OUT_INTRA_BSS_HO_RETURN OUT_INTRA_BSS_EQUIP_FAIL IN_INTRA_BSS_HO_RETURN IN_INTRA_BSS_EQUIP_FAIL If Timer HO_COMPLETE expiry Radio Channel Released If T8 expiry Radio Channel Released If T3103 expiry Clear Request OUT_INTRA_BSS_HO_LOSTMS CLR_REQ_TO_MSC Jason Wu

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Handover Required OUT_INTER_BSS_REQ_TO_MSC Start T7 Handover Request Handover Channel Assigned Channel Activation Channel Activation Ack Handover Allocation Start Timer HO_COMPLETE CR (Handover Request) Connection Request Start HO_Successful Switch Response Handover Request Ack HO_REQ_MSC_OK Handover Command Initiate Handover Handover Command HO Access Phy Info SABM UA Establish Indication Handover Complete Stop Timer HO_COMPLETE Start T8 Stop T7 OUT_INTER_BSS_HO_ATMPT OUT_HO_NC_CAUSE_ATMPT OUT_HO_CAUSE_ATMPT Handover Detection Handover Detection received Handover Detect Handover Successful Stop HO_Successful Handover Complete IN_INTER_BSS_HO_SUC Clear Command Release radio channel stopt T8 OUT_INTER_BSS_HO_SUC Handover Request Handover Failure HO_REQ_MSC_FAIL Handover Command Initiate Handover Handover Command Handover Failure Unsuccessful Handover Handover Failure OUT_INTER_BSS_HO_RETURN OUT_INTER_BSS_EQUIP_FAIL HO_REQ_MSC_FAIL If T8 expired Radio channel released OUT_INTER_BSS_HO_LOSTMS Jason Wu

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附件：呼叫建立成功率的流程图 OK_ACC_PROC_SUC_RACH Channel Request ACCESS_PER_RACH INV_EST_CAUSE_ON_RACH Channel Required Channel Required Received Channel Assigned ALLOC_SDCCH CHAN_REQ_MS_BLKD Immediate Assignment ALLOC_SDCCH_FAIL Reject Channel Activation Channel Activation Acknowledge Immediate Assignment Command Immediate Assignment ACCESS_PER_AGCH Command SABM(L3 Init Msg) Establish Indication UA Authentication Ciphering TMSI Reallocation Call Setup Assignment Resource Request Assignment Channel ALLOC_TCH Assigned Resource not ALLOC_TCH_FAIL Available Physical Context Request Physical Context Confirm Jason Wu CHAN_REQ_CAUSE_ATMPT START rr_t3101 STOP rr_t3101 OK_ACC_PROC CHAN_REQ_MS_FAIL (if Rr_t3101 expires) Initial L3 Info. CONN_REQ_TO_MSC CR Complete L3 Info. CC CONN_REFUSED CREF MA_REQ_FROM_MSC Assignment Request(CIC) Start timer assign_successful Initial Assignment MA_CMD_TO_MS_BLK Unsuccessful Assignment Stop timer assign_successful Assignment Failure Handover Procedure Page 4 4/16/2013 Data Request (Assignment Command) Data Indication (Assignment Complete) Data Indication (Assignment Failure) Channel Activation Channel Activation Acknowledge Assignment Command Start bssmap_T10 MA_CMD_TO_MS Assignment Complete Stop bssmap_ T10 Assign_successful must be greater than bssmap_t10 to support 2nd assignment ( see flow chart ) Stop timer assign_successful Assignment Successful Assignment Failure return to sdcch MA_FAIL_FROM_MS If T10 expires, which means the MS can’t tune to the TCH and it also fails to retun back to the SD.You’ll see high ASSIGN_FAILURE_RATE_LOST =(MA_CMD_TO_MS-INTRA_CELL_HO_SUC-MA_COMPLETE_TO_MSC-MA_FAIL_FROM_MS) / MA_CMD_TO_MS Unsuccessful Assignment If SDCCH drops during this period, the assignment procedure also fails with low TOTAL_CALLS and high RF_LOSSES_SD. Connection Request Switch Response Success Assignment Complete TOTAL_CALLS MA_COMPLETE_TO_MSC Jason Wu

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