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GSM CALL FLOW Mar7, 2001. MSCPSTNHLRGMSC MAP_SEND_ROUTING_ INFORMATION IAI (TUP) MS Terminated Call Procedure VLR MAP_PROVIDE_ROAMING_ NUMBER DCB MAP_PROVIDE_ROAMING_.

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Presentation on theme: "GSM CALL FLOW Mar7, 2001. MSCPSTNHLRGMSC MAP_SEND_ROUTING_ INFORMATION IAI (TUP) MS Terminated Call Procedure VLR MAP_PROVIDE_ROAMING_ NUMBER DCB MAP_PROVIDE_ROAMING_."— Presentation transcript:

1 GSM CALL FLOW Mar7, 2001

2 MSCPSTNHLRGMSC MAP_SEND_ROUTING_ INFORMATION IAI (TUP) MS Terminated Call Procedure VLR MAP_PROVIDE_ROAMING_ NUMBER DCB MAP_PROVIDE_ROAMING_ NUMBER ACK MAP_SEND_ROUTING_ INFORMATION ACK IAI (TUP) MAP_PAGE MAP_SEND_INFO_I/C_CALL

3 MS MSC BTSBSC Paging(UDT) (IMSI/TMSI,LAI or CGI) Paging Command (IMSI/TMSI,pag group,ch) Paging Request (L2-UI) (IMSI/TMSI) RR(PCH) RR(RACH) Channel Request Channel Required Channel Activation Channel Activation ACK Immediate Assignment RR(AGCH) (L2 - UI) A interfaceAbis interface Um interface BSSMAP Continue 1 Paging RESP (L2-SABM) EST IND(Paging Resp) Paging Resp CR(COMPL - L3 - INFO) L2 - UA (CKSN,MS ID,CGI,CLrk2) CC RR(SDCCH) BSSMAP Paging MS Terminated Call Procedure Immediate Assign Command T T T T T T3101 -

4 MM(SDCCH) RR(SDCCH) DTAP-MM RR(SDCCH) DTAP-MM BSSMAP MSBTS DATA REQ AUTH REQUEST ENCR CMD CIPHER MOD CMD Abis interface Um interface AUTH RESPONSE DATA IND CIPHER MOD COM MSCBSC AUTH REQUEST (DT1) (CKSN, RAND) AUTH RESPONSE (DT1) A interface CIPHER MOD CMD(DT1) (algo nb,key) (SRES) DATA IND CIPHER MOD COM(DT1) BSSMAP Continue 2 DATA REQ TMSI REAL CMD TMSI REAL COM DATA IND (new TMSI,LAI) TMSI REAL COM (DT1) TMSI REAL CMD (DT1) DTAP-MM MM(SDCCH) MS Terminated Call Procedure VLR MAP_AUTHENTICATE MAP_AUTHENTICATE ACK MAP_SET_CIPHERING_MODE MAP_FORWARD_NEW_TMSI MAP_FORWARD_NEW_TMSI ACK B interface T T MAP_PROCESS_ACCESS_REQ MAP_PROCESS_ACCESS_REQ_ACK

5 CC(SDCCH ) DTAP-CC Continue 3 MSBTS DATA REQ SET-UP Abis interfaceUm interface CALL CONFIRMED DATA IND MSCBSC SET-UP (DT1) CALL CONF (DT1) A interface T303 + MS Terminated Call Procedure T303 - T310 + VLR B interface MAP_COMPLETE_CALL

6 MSMSCBTSBSC ASSIGN REQ(DT1) (Ch type,CIC,L3 hd) PHYS CTX REQ QUEUING(DT1)Channel ACTIV DATA REQ Channel Activation ACK RELEASE REQ ASSIGN COM RR(FACCH) A interfaceAbis interface Um interface BSSMAP Continue 4 PHYS CTX CONF BSSMAP (TCH) ASSIGN CMD RR(SDCCH) (local end) (L2 - SABM) EST IND (L2 - UA) RR(FACCH) DATA IND ASSIGN COM(DT1) RF CHAN REL (SDCCH) BSSMAP RF CHAN REL ACK (BS/MS POW,TA) Radio-resource assignment MS Terminated Call Procedure CC TNT2 + TNT2 - T T9103 -

7 CC(FACCH) DTAP-CC MS ALERTING Um interface CONNECT MSC CONNECT (DT1) Continue 5 CONNECT ACK (DT1) DTAP-CC BTS DATA IND Abis interface DATA IND BSC ALERTING (DT1) A interface DATA REQ CONNECT ACK CC(FACCH) GMSCPSTN ACM(TUP) ANC(TUP) MS Terminated Call Procedure E interface T310 - T301 + T301 - T313 - T313 +

8 MS (L2 - UA) RR(FACCH) Um DTAP-CC Continue 6 DTAP-CC RELEASE CC(FACCH) CHAN REL (L2 - DISC) RR(FACCH) BSSMAP Radio-resource release DISCONNECT CC(FACCH) RELEASE COM CC(FACCH) DTAP-CC BSSMAP BTS DATA IND RF CHAN REL ACK DEACT SACCH MSCBSC DISCONNECT(DT1) RELEASE(DT1) DATA REQ DATA IND RELEASE COM(DT1) CLEAR CMD(DT1) AAbis DATA REQ CLEAR COM(DT1) RF CHAN REL REL IND (Mobile Release First) GMSC PSTN CBK(TUP) CLF(TUP) RLG(TUP) MS Terminated Call Procedure E DEACT SACCH ACK T308 + T308 - TNT3 + TNT3 - T T T T3111 -

9 MSMSC RELEASE COM(DT1) (L2 - UA) RR(FACCH) Um DTAP-CC Continue 7 DTAP-CC RELEASE CC(FACCH) CHAN REL (L2 - DISC) RR(FACCH) CLEAR COM(DT1) BSSMAP DISCONNECT CC(FACCH) RELEASE COM CC(FACCH) DTAP-CC BSSMAP BTS DATA REQ DATA IND DATA REQ Abis DATA REQ RF CHAN REL RF CHAN REL ACK Radio-resource release DEACT SACCH REL IND BSC DISCONNECT(DT1) RELEASE(DT1) CLEAR CMD(DT1) A (Mobile Release last) GMSCPSTN CLF(TUP) RLG(TUP) MS Terminated Call Procedure DEACT SACCH ACK T305 + T305 - TNT3 + TNT3 - T T T T E

10 MS MSC BTSBSC RR(RACH) Channel Request Channel Required Channel Activation Channel Activation ACK Immediate Assignment RR(AGCH) (L2 - UI) A interfaceAbis interface Um interface Mobile - Originating Call Procedure CM SERV REQ (L2-SABM) EST IND CR(COMPL - L3 - INFO) L2 - UA (CKSN,MS ID,SER type,CLmk) CC RR(SDCCH) BSSMAP Immediate Assign Command (SDCCH ID) T T T T T303 + VLR MAP_PROCESS_ACCESS_REQ B interface

11 Mobile - Originating Call Procedure MM(SDCCH) RR(SDCCH) DTAP-MM RR(SDCCH) DTAP-MM BSSMAP MS BTS DATA REQ AUTH REQUEST ENCR CMD CIPHER MOD CMD Abis interface Um interface AUTH RESPONSE DATA IND CIPHER MOD COM MSCBSC AUTH REQUEST (DT1) (CKSN, RAND) AUTH RESPONSE (DT1) A interface CIPHER MOD CMD(DT1) (algo nb,key) (SRES) DATA IND CIPHER MOD COM(DT1) BSSMAP Continue 1 DATA REQ TMSI REAL CMD TMSI REAL COM DATA IND (new TMSI,LAI) TMSI REAL COM (DT1) TMSI REAL CMD (DT1) DTAP-MM MM(SDCCH) VLR MAP_AUTHENTICATE MAP_AUTHENTICATE ACK MAP_SET_CIPHERING_MODE MAP_FORWARD_NEW_TMSI MAP_FORWARD_NEW_TMSI ACK B interface T T MAP_PROCESS_ACCESS_REQ_ACK

12 CC(SDCCH) DTAP-CC Continue2 MSBTS DATA IND SET-UP Abis interface Um interface CALL PROCEEDING DATA REQ MSCBSC SET-UP (DT1) CALL PROCEEDING (DT1) A interface T303 - T310 + Mobile - Originating Call Procedure MAP_SEND_INFO_FOR_O/G_CALL VLR B interface MAP_COMPLETE_CALL

13 MSMSCBTSBSC ASSIGN REQ(DT1) (Ch type,CIC,L3 hd) PHYS CTX REQ QUEUING(DT1)Channel ACTIV DATA REQ Channel Activation ACK RELEASE REQ ASSIGN COM RR(FACCH) A interfaceAbis interface Um interface BSSMAP Continue 3 PHYS CTX CONF BSSMAP (TCH) ASSIGN CMD RR(SDCCH) (local end) (L2 - SABM) EST IND (L2 - UA) RR(FACCH) DATA IND ASSIGN COM(DT1) RF CHAN REL (SDCCH) BSSMAP RF CHAN REL ACK (BS/MS POW,TA) Radio-resource assignment Mobile - Originating Call Procedure CC T T TNT2 + TNT2 -

14 CC(FACCH) DTAP-CC MS ALERTING Um interface CONNECT MSC CONNECT (DT1) Continue 4 CONNECT ACK (DT1) DTAP-CC BTS DATA REQ Abis interface DATA REQ BSC ALERTING (DT1) A interface DATA IND CONNECT ACK CC(FACCH) GMSCPSTN ACM(TUP) ANC(TUP) Mobile - Originating Call Procedure IAI(TUP) ANC(TUP) E interface T310 - T313 + T313 -

15 MS RR(FACCH) Um DTAP-CC Continue 5 DTAP-CC RELEASE CC(FACCH) RR(FACCH) DISCONNECT CC(FACCH) RELEASE COM CC(FACCH) DTAP-CC BTS DATA IND MSCBSC DISCONNECT(DT1) RELEASE(DT1) DATA REQ DATA IND RELEASE COM(DT1) AAbis (Mobile Release First) GMSC PSTN Mobile - Originating Call Procedure CLF(TUP) (L2 - UA) CHAN REL (L2 - DISC) BSSMAP Radio-resource release BSSMAP RF CHAN REL ACK DEACT SACCH CLEAR CMD(DT1) DATA REQ CLEAR COM(DT1) RF CHAN REL REL IND RLG(TUP) E DEACT SACCH ACK T305 + T305 - T308 + T308 - TNT3 + TNT3 - T T T T3111 -

16 MS RR(FACCH) Um DTAP-CC Continue 6 DTAP-CC RELEASE CC(FACCH) RR(FACCH) DISCONNECT CC(FACCH) RELEASE COM CC(FACCH) DTAP-CC BTS DATA REQ MSC BSC DISCONNECT(DT1) RELEASE(DT1) DATA IND RELEASE COM(DT1) AAbis (Mobile Release Last) GMSC PSTN Mobile - Originating Call Procedure CLF(TUP) RLG(TUP) (L2 - UA) CHAN REL (L2 - DISC) BSSMAP Radio-resource release BSSMAP RF CHAN REL ACK DEACT SACCH CLEAR CMD(DT1) DATA REQ CLEAR COM(DT1) RF CHAN REL REL IND CBK(TUP) CLF(TUP) E DEACT SACCH ACK T T305 + T305 - T308 + T308 - TNT3 + TNT3 - T T T3111 -

17 MS MSC BTSBSC RR(RACH) Channel Request Channel Required Channel Activation Channel Activation ACK Immediate Assignment RR(AGCH) (L2 - UI) A interfaceAbis interface Um interface LOC UPDAT REQ EST IND CR(COMPL - L3 - INFO) L2 - UA (CKSN,MS ID,LUT,LAI,CLmk1) CC RR(SDCCH) BSSMAP Immediate Assign Command (SDCCH ID) (L2-SABM) INTRA_VLR LOCATION UPDATING OR IMSI ATTACH( in old VLR ) ** ** : This message is sent by the MS to the network either to request update of its location (normal updating or periodic updating) or to request IMSI attach. T T T T T3210 +

18 Continue 1 MM(SDCCH) RR(SDCCH) DTAP-MM RR(SDCCH) DTAP-MM BSSMAP MSBTS DATA REQ AUTH REQUEST ENCR CMD CIPHER MOD CMD Abis interface Um interface AUTH RESPONSE DATA IND CIPHER MOD COM MSCBSC AUTH REQUEST (DT1) (CKSN, RAND) AUTH RESPONSE (DT1) A interface CIPHER MOD CMD(DT1) (algo nb,key) (SRES) DATA IND CIPHER MOD COM(DT1) BSSMAP DATA REQ TMSI REAL CMD TMSI REAL COM DATA IND (new TMSI,LAI) TMSI REAL COM (DT1) TMSI REAL CMD (DT1) DTAP-MM MM(SDCCH) VLR MAP_AUTHENTICATE MAP_AUTHENTICATE ACK MAP_SET_CIPHERING_MODE B interface T T MAP_UPDATE_ LOCATION_AREA MAP_FORWARD_NEW_TMSI MAP_FORWARD_NEW_TMSI ACK MAP_UPDATE_LOCATION _AREA ACK INTRA_VLR LOCATION UPDATING OR IMSI ATTACH( in old VLR )

19 RR(SDCCH) Continue 2 MM(SDCCH) RR(SDCCH) MS Um DTAP-MM Loc Upd Acc BTSMSCBSC Loc Updat Acc(DT1) DATA REQ AAbis (L2 - UA) CHAN REL (L2 - DISC) BSSMAP Radio-resource release BSSMAP RF CHAN REL ACK DEACT SACCH CLEAR CMD(DT1) DATA REQ CLEAR COM(DT1) RF CHAN REL REL IND DEACT SACCH ACK INTRA_VLR LOCATION UPDATING OR IMSI ATTACH( in old VLR ) T TNT3 + TNT3 - T T3109 -

20 MS MSC BTSBSC RR(RACH) Channel Request Channel Required Channel Activation Channel Activation ACK Immediate Assignment RR(AGCH) (L2 - UI) A interfaceAbis interface Um interface LOC UPDAT REQ ** EST IND CR(COMPL - L3 - INFO) L2 - UA (CKSN,IMSI,LUT,LAI,CLmk1) CC RR(SDCCH) BSSMAP Immediate Assign Command (SDCCH ID) (L2-SABM) INTER_VLR LOCATION UPDATING (MS Send IMSI) OR IMSI ATTACH( not in old VLR ) ** : This message is sent by the MS to the network either to request update of its location (normal updating or periodic updating) or to request IMSI attach. T T T T T3210 +

21 Continue 1 MM(SDCCH) RR(SDCCH) DTAP-MM RR(SDCCH) DTAP-MM BSSMAP MSBTS DATA REQ AUTH REQUEST ENCR CMD CIPHER MOD CMD AUTH RESPONSE DATA IND CIPHER MOD COM MSCBSC AUTH REQUEST (DT1) (CKSN, RAND) AUTH RESPONSE (DT1) A CIPHER MOD CMD(DT1) (algo nb,key) (SRES) DATA IND CIPHER MOD COM(DT1) BSSMAP DATA REQ TMSI REAL CMD TMSI REAL COM DATA IND (new TMSI,LAI) TMSI REAL COM (DT1) TMSI REAL CMD (DT1) DTAP-MM MM(SDCCH) VLR MAP_AUTHENTICATE MAP_AUTHENTICATE ACK MAP_SET_CIPHERING_MODE T T MAP_UPDATE_ LOCATION_AREA MAP_FORWARD_NEW_TMSI MAP_FORWARD_NEW_TMSI ACK MAP_UPDATE_ LOCATION_AREA ACK HLR MAP_INSERT_SUBSCRIBER_DATA MAP_INSERT_SUBSCRIBER_DATA ACK MAP_UPDATE_LOCATION ACK INTER_VLR LOCATION UPDATING (MS Send IMSI) MAP_UPDATE_LOCATION PVLR D AbisUmB D MAP_CANCEL_ LOCATION MAP_CANCEL_ LOCATION ACK OR IMSI ATTACH( not in old VLR )

22 RR(SDCCH) Continue 2 MM(SDCCH) RR(SDCCH) MS Um DTAP-MM Loc Upd Acc BTSMSCBSC Loc Updat Acc(DT1) DATA REQ AAbis (L2 - UA) CHAN REL (L2 - DISC) BSSMAP Radio-resource release BSSMAP RF CHAN REL ACK DEACT SACCH CLEAR CMD(DT1) DATA REQ CLEAR COM(DT1) RF CHAN REL REL IND DEACT SACCH ACK INTER_VLR LOCATION UPDATING (MS Send IMSI) OR IMSI ATTACH( not in old VLR ) T TNT3 + TNT3 - T T3109 -

23 MS MSC BTSBSC RR(RACH) Channel Request Channel Required Channel Activation Channel Activation ACK Immediate Assignment RR(AGCH) (L2 - UI) A interfaceAbis interface Um interface LOC UPDAT REQ EST IND CR(COMPL - L3 - INFO) L2 - UA (CKSN,TMSI,LUT,LAI,CLmk1) CC RR(SDCCH) BSSMAP Immediate Assign Command (SDCCH ID) (L2-SABM) INTER_VLR LOCATION UPDATING (MS Send TMSI) OR IMSI ATTACH( not in old VLR ) T T T T T3210 +

24 Continue 1 MM(SDCCH) RR(SDCCH) DTAP-MM RR(SDCCH) DTAP-MM BSSMAP MSBTS DATA REQ AUTH REQUEST ENCR CMD CIPHER MOD CMD AUTH RESPONSE DATA IND CIPHER MOD COM MSCBSC AUTH REQUEST (DT1) (CKSN, RAND) AUTH RESPONSE (DT1) A CIPHER MOD CMD(DT1) (algo nb,key) (SRES) DATA IND CIPHER MOD COM(DT1) BSSMAP DATA REQ TMSI REAL CMD TMSI REAL COM DATA IND (new TMSI,LAI) TMSI REAL COM (DT1) TMSI REAL CMD (DT1) DTAP-MM MM(SDCCH) VLR MAP_AUTHENTICATE MAP_AUTHENTICATE ACK MAP_SET_CIPHERING_MODE T T MAP_UPDATE_ LOCATION_AREA MAP_FORWARD_NEW_TMSI MAP_FORWARD_NEW_TMSI ACK MAP_UPDATE_ LOCATION_AREA ACK HLR MAP_INSERT_SUBSCRIBER_DATA MAP_INSERT_SUBSCRIBER_DATA ACK MAP_UPDATE_LOCATION ACK INTER_VLR LOCATION UPDATING (MS Send TMSI) MAP_UPDATE_LOCATION PVLR D AbisUmB D MAP_CANCEL_ LOCATION MAP_CANCEL_ LOCATION ACK MAP_SEND_IDENTIFICATION MAP_SEND_ IDENTIFICATION ACK MAP_PROVIDE_IMSI MAP_PROVIDE_IMSI ACK Identity Request Identity Response In case of IMSI can not be retrieve from PVLR OR IMSI ATTACH( not in old VLR )

25 RR(SDCCH) Continue 2 MM(SDCCH) RR(SDCCH) MS Um DTAP-MM Loc Upd Acc BTSMSCBSC Loc Updat Acc(DT1) DATA REQ AAbis (L2 - UA) CHAN REL (L2 - DISC) BSSMAP Radio-resource release BSSMAP RF CHAN REL ACK DEACT SACCH CLEAR CMD(DT1) DATA REQ CLEAR COM(DT1) RF CHAN REL REL IND DEACT SACCH ACK INTER_VLR LOCATION UPDATING (MS Send TMSI) OR IMSI ATTACH( not in old VLR ) T TNT3 + TNT3 - T T3109 -

26 MSC A BTS BSC Intra_Cell HandOver A-bis Um MS RR(SACCH) RR(FACCH) L2-SABM L2-UI ASSIGN COM MEAS REP CHAN ACTIV (ch typ,Ciph K) (HO Ref) CHAN ACT ACK DATA REQ ASSIGN CMD RR(New FACCH) DATA IND EST IND RF CHA REL (old TCH) HO PERFOMED(DT1) (Cause: intra_cell) BSSMAP RF CHA REL ACK Old channel local end release RR(FACCH) T T3107 -

27 MSC A BTS2BTS1BSC Intra-BSS Handover A-bis Um MS HO ACCESS RR(SACCH) HO ACCESS PHYS INFO RR(FACCH) L2-SABM L2-UI RR(New FACCH) HO COMPLET A-bis MEAS REP CHAN ACTIV (ch typ,Ciph K) (HO Ref) CHAN ACT ACK DATA REQ HO COMMAND HO DETECT ESTA IND DATA IND RF CHA REL (old TCH) HO PERFOMED(DT1) (Cause) BSSMAP RF CHA REL ACK RR(FACCH) BSSMAP RR(FACCH) T T T T3124 -

28 CHAN ACTIV BTS1 A-bis DATA REQ BSC2 CC BSC1 HO REQU(DT1) A HO CMD(DT1) MSC HO REQUEST(DT1) A HO COMMAND BTS2MS MEAS REP CHA ACT ACK Intra-MSC Handover Serving BSS A-bis Um Target BSS RR(SACCH) MEAS RES Cell Id lst,Cause BSSMAP CR(Ch typ,Clmk) (Cell, Ciph K) BSSMAP HO REQ ACK(DT1) (Cell,Ch Inf,Ho Ref) BSSMAP RR(FACCH) BSSMAP T7 + T7 - T8 + T101 + T101 - T102 + T9113 +

29 HO DETECT BTS1 A-bis RF CHAN REL BSC2BSC1 A CLEAR CMD(DT1) MSC A BTS2MS HO ACCESS Serving BSS A-bis Um Target BSS RR(new FACCH) HO COMPLET(DT1) BSSMAP (old TCH) Continue 1 HO ACCESS RR(FACCH) PHYS INFO L2-SABM L2-UI ESTA IND HO COMPLET DATA IND CLEAR CMP(DT1) BSSMAP Intra-MSC Handover RF CHAN RELACK RR(FACCH) T T T9113 -T102 - T8 -TNT3 + TNT3 -

30 Inter-MSC Handover MSCA A BTSABSCA A-bis Um MS RR(SA CCH) MEAS REP HO REQU(DT1) Cell Id lst,Cause MSCBVLRB EB MAP_PREPARE_ HANDOVER MAP_ALLOCATE _HO_NUMBER MAP_SEND_ HO_REPORT MAP_PREPARE_HANDOVER ACK MAP_SEND_ HO_REPORT ACK IAM(TUP) ACM(TUP) HO CMD(DT1) (Cell,Ch Inf,Ho Ref)DATA REQ HO COMMAND RR(FA CCH) BSSMAP RF CHA REL (old TCH) RF CHA REL ACK After HO Succeed BSCB BSSMAP HO REQ(DT1) CHAN ACTIV CC CHA ACT ACK CR(Ch typ,Clmk) (Cell, Ciph K) HO REQ ACK(DT1) BSSMAP BTSB BTSABSCA CLEAR CMD(DT1) BSSMAP CLEAR CMP(DT1) BSSMAP T201 + T201 - T210 + TNT3 + TNT3 - T103 + T204 + T210 -

31 Inter-MSC Handover Continue 1 MSCB A BTSBBSCB A-bis Um MS HO COMMPLETE(DT1) (Cause) BSSMAP MSCAVLRB EB RR(New FACCH) HO DETECTION HO ACCESS PHYS INFO L2-SABM L2-UI ESTA IND HO COMPLET DATA IND HO ACCESS ANC(TUP) MAP_SEND_END_SIGNAL RR(FA CCH) MAP_PROCESS_ACCESS _SIGNALLING RR(FA CCH) HO DETECT(DT1) BSSMAP T204 - T103 -

32 Subsequent Inter-MSC Handover MSCB A BTSBBSCB A-bis Um MS RR(SA CCH) MEAS REP HO REQU(DT1) Cell Id lst,Cause MSCAVLRC EB MAP_PREPARE_ HANDOVER MAP_ALLOCATE _HO_NUMBER MAP_SEND_ HO_REPORT MAP_PREPARE_HANDOVER ACK MAP_SEND_ HO_REPORT ACK IAM(TUP) ACM(TUP) HO CMD(DT1) (Cell,Ch Inf,Ho Ref) DATA REQ HO COMMAND RR(FA CCH) BSSMAP RF CHA REL (old TCH) RF CHA REL ACK After HO Succeed BSCC BSSMAP HO REQ(DT1) CHAN ACTIV CC CHA ACT ACK CR(Ch typ,Clmk) (Cell, Ciph K) HO REQ ACK(DT1) BSSMAP BTSC BTSBBSCB CLEAR CMD(DT1) BSSMAP CLEAR CMP(DT1) BSSMAP MAP_PREPARE_ Subs_HANDOVER MSCC MAP_PREPARE_ Subs_HANDOVER ACK E T201 + T201 - T210 + TNT3 + TNT3 - T210 - T204 + T103 +

33 Continue 1 MSCC A BTSCBSCC A-bis Um MS HO COMMPLETE(DT1) (Cause) BSSMAP MSCAMSCB EB RR(New FACCH) HO DETECTION HO ACCESS PHYS INFO L2-SABM L2-UI ESTA IND HO COMPLET DATA IND HO ACCESS ANC(TUP) MAP_SEND_END_SIGNAL RR(FA CCH) MAP_PROCESS_ACCESS _SIGNALLING RR(FA CCH) HO DETECT(DT1) BSSMAP Subsequent Inter-MSC Handover MAP_SEND_END_SIGNAL ACK REL(TUP) RLC(TUP) T204 - T103 -

34 Subsequent Inter-MSC Handback MSCB A BTSBBSCB A-bis Um MS RR(SA CCH) MEAS REP HO REQU(DT1) Cell Id lst,Cause MSCAVLRA EB MAP_PREPARE_ Subs_HANDOVER MAP_ALLOCATE _HO_NUMBER MAP_SEND_ HO_REPORT MAP_PREPARE_Subs_ HANDOVER ACK MAP_SEND_ HO_REPORT ACK HO CMD(DT1) (Cell,Ch Inf,Ho Ref)DATA REQ HO COMMAND RR(FA CCH) BSSMAP RF CHA REL (old TCH) RF CHA REL ACK After HO Succeed BSCA BSSMAP HO REQ(DT1) CHAN ACTIV CC CHA ACT ACK CR(Ch typ,Clmk) (Cell, Ciph K) HO REQ ACK(DT1) BSSMAP BTSA BTSBBSCB CLEAR CMD(DT1) BSSMAP CLEAR CMP(DT1) BSSMAP T104 +

35 Continue 1 MSCA A BTSABSCA A-bis Um MS HO COMMPLETE(DT1) (Cause) BSSMAP MSCB E RR(New FACCH) HO DETECTION HO ACCESS PHYS INFO L2-SABM L2-UI ESTA IND HO COMPLET DATA IND HO ACCESS REL(TUP) MAP_SEND_END_SIGNAL ACK RR(FA CCH) Subsequent Inter-MSC Handback RLC(TUP) T104 -

36 MSMSCBTSBSC RR(RACH) Channel Request Channel Required Channel Activation Channel Activation ACK Immediate Assignment RR(AGCH) (L2 - UI) A interface Abis interface Um interface IMSI DETACH IMSI DETACH IND EST IND CR(COMPL - L3 - INFO) L2 - UA (MS ID) RR(SDCCH) BSSMAP UNIT DATA REQ (SDCCH ID) (L2-SABM) VLR B interface MAP_DETACH_IMSI ** ** : If no RR connection exists, the MM sublayer within the mobile station will request the RR sublayer to establish a RR connection. If establishment of the RR connection is not possible because a suitable cell is not (or not yet) available then, the mobile station shall try for a period of at least 5 seconds and for not more than a period of 20 seconds to find a suitable cell. If a suitable cell is found during this time then, the mobile station shall request the RR sublayer to establish an RR connection, otherwise the IMSI detach is aborted. If a RR connection exists, the MM sublayer will release locally any ongoing MM connections before the IMSI DETACH IND message is sent.

37 RR(SDCCH) MS Um BTSMSCBSC AAbis (L2 - UA) CHAN REL (L2 - DISC) BSSMAP Radio-resource release BSSMAP RF CHAN REL ACK DEACT SACCH CLEAR CMD(DT1) DATA REQ CLEAR COM(DT1) RF CHAN REL REL IND DEACT SACCH ACK IMSI DETACH Continue 1

38 MS MSC BTS BSC RR(RACH) Channel Request Channel Required Channel Activation Channel Activation ACK Immediate Assignment RR(AGCH) (L2 - UI) A Abis Um interface Mobile - Originating SMS Procedure CM SERV REQ (L2-SABM) EST IND CR(COMPL - L3 - INFO) L2 - UA (CKSN,MS ID,SER type,CLmk) CC RR(SDCCH) BSSMAP Immediate Assign Command (SDCCH ID) MAP_PROCESS_ACCESS_REQ VLR

39 Mobile - Originating SMS Procedure MM(SDCCH ) RR(SDCCH) DTAP-MM RR(SDCCH) DTAP-MM BSSMAP MSBTS DATA REQ AUTH REQUEST ENCR CMD CIPHER MOD CMD Abis interface Um interface AUTH RESPONSE DATA IND CIPHER MOD COM MSCBSC AUTH REQUEST (DT1) (CKSN, RAND) AUTH RESPONSE (DT1) A interface CIPHER MOD CMD(DT1) (algo nb,key) (SRES) DATA IND CIPHER MOD COM(DT1) BSSMAP Continue 1 UA (SAPI=3) EST IND (SAPI=3) RR(SDCCH) VLR MAP_AUTHENTICATE MAP_AUTHENTICATE ACK MAP_SET_CIPHERING_MODE B interface T T RR(SDCCH) SABM (SAPI=3) MAP_PROCESS_ACCESS_REQ_ACK

40 Mobile - Originating SMS Procedure SMS(SDCCH) RR(SDCCH) BSSMAP MS BTS CP-DATA(RP-DATA) DATA REQ CHAN REL Abis Um MSCBSC A CLEAR CMD(DT1) RF CHAN REL CLEAR COM(DT1) BSSMAP Continue 2 UA (SAPI=0) REL IND SC RR(SDCCH) DISC (SAPI=0) CP-ACK SMS(SDCCH) SM-RL Req Ind. DEACT SACCH DEACT SACCH ACK RF CHAN REL ACK VLRSMS_GMSC MAP_SEND_INFO_MO_SMS MAP_COMPLETE_CALL MAP_MO_FORWARD_SMS SM-RL Data Req MAP_MO_FORWARD_SMS_ACK CP-ACK SMS(SDCCH) CP-DATA(RP-ACK)

41 Mobile - Terminated SMS Procedure SMS_GMSC C interface SCHLRMSCVLRMS RS-MT-DATA.REQ MAP_SEND_ROUTING_INFO_FOR_SM MAP_MT_FORWARD_SM MAP_SEND_ROUTING_INFO_FOR_SM_ACK MAP_SEND_INFO_FOR_MT_SMS MAP_PAGE B interfaceC interface

42 MS MSC BTSBSC RR(RACH) Channel Request Channel Required Channel Activation Channel Activation ACK Immediate Assignment RR(AGCH) (L2 - UI) A interfaceAbis interface Um interface Mobile - Terminated SMS Procedure Paging RESP (L2-SABM) EST IND CR(COMPL - L3 - INFO) L2 - UA (CKSN,MS ID,SER type,CLmk) CC RR(SDCCH) BSSMAP Immediate Assign Command (SDCCH ID) Paging(UDT) Paging Command RR(PCH) Paging Request (L2-UI) Continue 1

43 Mobile - Terminated SMS Procedure MM(SDCCH ) RR(SDCCH) DTAP-MM RR(SDCCH) DTAP-MM BSSMAP MSBTS DATA REQ AUTH REQUEST ENCR CMD CIPHER MOD CMD Abis interface Um interface AUTH RESPONSE DATA IND CIPHER MOD COM MSCBSC AUTH REQUEST (DT1) (CKSN, RAND) AUTH RESPONSE (DT1) A interface CIPHER MOD CMD(DT1) (algo nb,key) (SRES) DATA IND CIPHER MOD COM(DT1) BSSMAP Continue 2 VLR MAP_AUTHENTICATE MAP_AUTHENTICATE ACK MAP_SET_CIPHERING_MODE B interface T T MAP_PROCESS_ACCESS_REQ MAP_PROCESS_ACCESS_REQ_ACK MAP_COMPLETE_CALL

44 Mobile - Terminated SMS Procedure RR(SDCCH) BSSMAP MSBTS DATA REQ CHAN REL AbisUm MSCBSC A CLEAR CMD(DT1) RF CHAN REL CLEAR COM(DT1) BSSMAP Continue 3 UA (SAPI=0) REL IND SC RR(SDCCH) DISC (SAPI=0) DEACT SACCH DEACT SACCH ACK RF CHAN REL ACK UA (SAPI=3) EST REQ (SAPI=3) SMS(SDCCH) SABM (SAPI=3) CP-DATA(RP-DATA) EST CONF (SAPI=3) CP-ACK MAP_MT_FORWARD_SM_ACK RS-Report Ind. SMS_GMSC MAP_REPORT_SM_DELIVERY_STATUS HLR E SMS(SDCCH) CP-DATA(RP-ACK) CP-ACK


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