BSC 1/4 Mobile Terminating/Originating BTS MOTOROLA Call Establishment MS RSS L1 RSS RRSM/RCI CRM/AM SM SSM MTP/MSC MTP L3 (pre -proc) paging Page Mobile request Paging command Paging Request Page_req_from_msc Pegged per message: For every decoded Paging message ACCESS_PER_PCH page_req_from_msc_fail Possibly increase: For every undecoded PCH_AGCH_Q_LENGTH paging message RSS PCH_Q_PAGE_DISCARD RSS L1 ABIS MSG_DISCARD_ON_GPROC Channel request MSG_DISCARD_ON_RSL Channel RACH request access_per_rach Channel required ok_acc_proc_suc_rach CHAN_REQ_CAUSE_ATMPT Last SDCCH? Channel request Sdcch_congestion channel required Last RACH or received Busy_SDCCH Immediate assignment reject No SDCCH? Immediate assignment reject ALLOC_SDCCH_FAIL CHAN_REQ_MS_BLK Channel assigned AGCH T3126 starts channel activation ALLOC_SDCCH Internal MTB See next page for detailschannel activation acknowledge Internal MTB stops Immediate Access_per_AGCH assignment command T3101 is started to Immediate assignment Wait for “establish on AGCH Indication” T3126 stops Layer 3 Initial Message Establish indication T303 starts CM service request / Ok_acc_proc MS power control T3230 start Paging Response etc. ms_access_by_type Layer 2 T3101 expires, peg SABM on assigned SDCCH Chan_req_ms_fail Initial Layer 3 message (max. 6) No ok_acc_proc CM service request/ is pegged Paging Response etc. UA on SDCCH channel Connection Request No UA if T3101 is expired sccp_tconn_est Conn_req_to_msc measurement report Connection Confirm release radio channel sccp_tconn_est Connection Refused Channel release expires Conn_refused DTAP Message DTAP Message DTAP Message: Authentication request DTAP Message Authentication Response DTAP Message DTAP Message: Authentication Response DTAP Message Classmark Request classmark classmark request enquiry Classmark change update classmark Classmark update classmk_update_fail cipher mode request Ciphering mode ciphering request command Ciphering_successful T3230 stops cipher_comp_ms Ciphering mode complete Ciphering successful Ciphering mode Missing measurement report complete No ciphering cipher_comp_ms timeout Successful Ciphering_successful Missing measurement report expires received Error Indication cipher_mode_fail T200*(N200+1) timeout Error Indication / Link_fail declared Received RSS Error RF_LOSSES_SD Radio Channel Release clear request DTAP: TMSI reallocation clr_req_to_msc DTAP: setup DTAP: setup: Motorola will modify some parameters like CCBS etc DTAP: call proceeding DTAP: call proceeding T303 stops T310 starts measurement report DTAP: setup DTAP: setup DTAP: setup DTAP: setup T303 starts DTAP: Call CONFirmed DTAP: Call CONFirmed T303 stops David Zhang 10/01/2010 T310 starts 2/4 MOTOROLA BSC Mobile Terminating/Originating BTS Call Establishment MS RSSL1 RSS RRSM/RCI CRM/AM SM SSM MTP/MSC AM CIC capacity request assignment request Unequipped CIC Initiate assignment CIC capacity response ma_req_from_msc No queuing allowed or Assignment resource assign_successful And maybe: queue is full and all request resource not available efr_req_from_msc TCHs busy. Or: DR not in operation. ALLOC_TCH_FAIL Ma_req_from_msc_fail Unsuccessful MA_CMD_TO_MS_BLKD Assignment failure assignment Calls_queued Force queue Tch_q_length No queuing message RSS BSSMAP_T11 starts Assignment queued is sent to MSC when RSS L1 ABIS BSSMAP_T11 stops Assignment channel Direct Retry is used mph activate req assigned TCH_Q_REMOVED Queuing indication channel_act(10000ms) Physical context ALLOC_TCH Internal MTT starts Busy_TCH RSS L2 request Physical context TCH_usage Fm connection indication mph activate confirmed Internal MTT stops TCH_congestion confirm channel activation channel_act stops Internal MTB starts channel activation channel_act timeout acknowledge Internal MTB stops channel activation failure - assignment message Release request clear request No assignment channel Assigned Clear Command received, then BSSMAP_T11 expires CLR_REQ_TO_MSC Assignment command Assignment command BSSMAP_T10(T3107) Assignment failure CLR_CMD_FROM_MSC Assignment failure MA_CMD_TO_MS (Data indication) MA_FAIL_FROM_MS Subseq Assignment SECOND_ASSIGN_ATMPT resource request measurement report resource not available ALLOC_TCH_FAIL MA_CMD_TO_MS_BLKD Resource available Assignment channel Assignment command assigned ALLOC_TCH Assignment command BSC MA_CMD_TO_MS SABM SABM FACCH UA UA Assignment complete MA_COMPLETE_FROM_MS Assignment complete SM SSM SECOND_ASSIGN_SUC Assignment successful BSSMAP_T10(T3107) expires Radio channel released Clear request No assignment Complete received SM Connection Clear Command Request switch response Assignment success complete Ma_complete_to_msc switch response TOTAL_CALLS failure Assignment failure DISCONNECT: cause value 27-Destination out of order (equipment_fail) T310 stops Or: No switch response Clear command measurement report success received Clear request measurement report assign_successful expires Clear command RELEASE T308 starts RELEASE COMPLETE T308 stops CHANNEL RELEASE Notes: different colours mean parallel possible status happening. 3/4 MOTOROLA BSC Mobile Terminating/Originating BTS Call Establishment MS RSSL1 RSS RRSM/RCI CRM/AM SM SSM MTP/MSC MS Terminated call DTAP: ALERTING DTAP: ALERTING No Timer control for alerting DTAP: ALERTING T310 stops DTAP: CONNECT T301 starts(180seconds) T313 starts DTAP: CONNECT DTAP: CONNECT DTAP: CONNect ACK T301 stops ( DTAP CONN ACK) DTAP, CONN ACK T313 stops T313 expires DTAP IND: DISCCONECT DTAP IND: DISCCONECT DTAP: DISCONNECT David Zhang 27/03/2007 MS Originated Call No Timer control DATA REQUEST, ALERT for alerting T310 stops ( DTAP Alert ) DTAP, ALERT DATA REQUEST, CONN T313 starts T310 stops ( DTAP CONN ) DTAP, CONN DATA IND, CONN ACK DTAP CONN ACK DTAP CONN ACK measurement report T313 stops Missing measurement report … Missing measurement report Missing measurement report Error Indication Error Indication Link_fail/T200*(N200+1) Received timeout declared RSS Error RF_LOSSES_TCH clear request MSC Initiated call Clearing Radio Channel Release CLR_REQ_TO_MSC measurement report DATA REQUEST, DISCONN T306 starts progress indicator #8 "in-band information or appropriate pattern now available" ( DTAP DISCONN ) DTAP, DISCONN OR T305 starts DATA REQUEST, DISCONN ( DTAP DISCONN ) DTAP, DISCONN measurement report DATA IND, RELEASE DTAP RELEASE DTAP RELEASE T308 starts T305/6 stops measurement report measurement report Missing measurement report …………. DTAP RELEASE COMPLETE ( DTAP RELEASE COMPLETE ) DTAP, RELEASE COMPLETE T308 stops T305/6 expires measurement report Missing measurement report DATA REQUEST, Channel release Release radio channel DT1 BSSMAP, Radio_chan_released CLEAR COMMAND De-allocate active DCH De-activate SACCH Channel De-allocated Release indication Radio channel released Release indication Radio_chan_released stops DT1 Clear complete received (RF Channel release) SM disconnection RLD (RF Channel release Request acknowledge) (RF Channel release switch response RLC Acknowledge Received) SCCP Release (de-allocate SCCP sccp_released starts Link_fail/T200*(N200+1) reference number ) SCCP Release Doesn’t timeout Complete sccp_released stops Notes: different colours mean parallel possible status happening. David Zhang 27/02/2008 4/4 MOTOROLA BSC Mobile Terminating/Originating BTS Call Establishment MS RSSL1 RSS RRSM/RCI CRM/AM SM SSM MTP/MSC MS initiated call Clearing measurement report Data IND, DISCONNECT (DTAP: DISCONNECT) DTAP: DISCONNECT ………… T305 starts DATA REQ, RELEASE (DTAP: RELEASE) DTAP: RELEASE T305 stops T308 starts T308 expires first time DATA REQ, RELEASE (DTAP: RELEASE) DTAP: RELEASE T308 starts Data IND, RELEASE COMPLETE (DTAP: RELEASE COMPLETE) DTAP: RELEASE COMPLETE T308 T305 timeouts RELEASE stops T308 starts T308 expires first timer RELEASE T308 starts RELEASE COMPLETE T308 stops CHANNEL RELEASE measurement report Missing measurement report measurement report Missing measurement report Missing measurement report Missing measurement report Error Indication Error Indication Link_fail/T200*(N200+1) Received timeout declared RSS Error RF_LOSSES_TCH clear request Radio Channel Release CLR_REQ_TO_MSC T308 expires twice DATA REQUEST, Channel release Release radio channel CLEAR COMMAND Radio_chan_released De-allocate active dch De-activate SACCH Channel De-allocated Release indication Radio channel released Release indication Radio_chan_released stops DT1 Clear complete (RF Channel release) received SM disconnection RLD (RF Channel release Request acknowledge) (RF Channel release switch response RLC Acknowledge Received) SCCP Release (de-allocate SCCP sccp_released starts reference number ) SCCP Release sccp_released stops Complete David Zhang 27/02/2008 Notes: different colours mean parallel possible status happening.
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