callflow(new)

callflow(new)
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MS Terminated Call Procedure

B

D

C

MSC

VLR

HLR

GMSC
IAI (TUP)

PSTN

MAP_SEND_ROUTING_ INFORMATION MAP_PROVIDE_ROAMING_ NUMBER

MAP_PROVIDE_ROAMING_ NUMBER ACK MAP_SEND_ROUTING_ INFORMATION ACK

IAI (TUP)

MAP_SEND_INFO_I/C_CALL

MAP_PAGE

MS Terminated Call Procedure Continue 1

MS

Um interface

BTS

Abis interface

BSC

A interface MSC

T3113 + (IMSI/TMSI,LAI or CGI) Paging Command Paging Request (L2-UI) (IMSI/TMSI,pag group,ch)

Paging(UDT)

BSSMAP

RR(PCH)

(IMSI/TMSI) Channel Request

RR(RACH) T3120 +

Channel Required

Channel Activation

Channel Activation ACK

Immediate Assign Command T3101 + (L2 - UI) Immediate Assignment

RR(AGCH) T3120 -

Paging RESP (L2-SABM)

RR(SDCCH)
EST IND(Paging Resp) T3101 L2 - UA Paging Resp CR(COMPL - L3 - INFO) (CKSN,MS ID,CGI,CLrk2) CC T3113 -

RR(SDCCH)

BSSMAP

Paging

MS Terminated Call Procedure Continue 2 Um interface MS BTS Abis interface BSC A interface MSC B interface VLR

MAP_PROCESS_ACCESS_REQ

MAP_AUTHENTICATE AUTH REQUEST (DT1) DATA REQ<AUTH> AUTH REQUEST (CKSN, RAND) T3260 +

DTAP-MM

MM(SDCCH)
AUTH RESPONSE

MM(SDCCH)
DATA IND<AUTH> AUTH RESPONSE (DT1) T3260 (SRES)

DTAP-MM
MAP_AUTHENTICATE ACK

MAP_SET_CIPHERING_MODE CIPHER MOD CMD(DT1) ENCR CMD

BSSMAP

(algo nb,key)

RR(SDCCH)

CIPHER MOD CMD

RR(SDCCH)

CIPHER MOD COM DATA IND <CIPH MOD COM> CIPHER MOD COM(DT1)

BSSMAP

MAP_PROCESS_ACCESS_REQ_ACK

MAP_FORWARD_NEW_TMSI TMSI REAL CMD (DT1) DATA REQ

DTAP-MM

(new TMSI,LAI)

MM(SDCCH) MM(SDCCH)

TMSI REAL CMD

<TMSI REAL CMD>

TMSI REAL COM DATA IND <TMSI REAL COM> TMSI REAL COM (DT1)

DTAP-MM
MAP_FORWARD_NEW_TMSI ACK

MS Terminated Call Procedure Continue 3

Um interface MS BTS

Abis interface BSC

A interface MSC

B interface VLR

MAP_COMPLETE_CALL

SET-UP (DT1) T303 +

DTAP-CC

DATA REQ <SET UP> SET-UP

CC(SDCCH)

CC(SDCCH)

CALL CONFIRMED

DATA IND <CALL CONF> CALL CONF (DT1) T303 T310 +

DTAP-CC

MS Terminated Call Procedure Continue 4 MS Um interface BTS Abis interface BSC A interface MSC

ASSIGN REQ(DT1) (Ch type,CIC,L3 hd) PHYS CTX REQ

TNT2 +

BSSMAP

PHYS CTX CONF (BS/MS POW,TA)

Channel ACTIV (TCH)

T9103 +

QUEUING(DT1)

BSSMAP

Channel Activation ACK T9103 -

DATA REQ <ASSIGN CMD>

RR(SDCCH)

ASSIGN CMD RELEASE REQ (local end)

RR(FACCH)

(L2 - SABM) EST IND

RR(FACCH)

(L2 - UA)

RR(FACCH)

ASSIGN COM DATA IND <ASSIGN COM> ASSIGN COM(DT1) TNT2 -

BSSMAP

RF CHAN REL (SDCCH) RF CHAN REL ACK

CC

Radio-resource assignment

MS Terminated Call Procedure Continue 5 Um interface MS BTS
ALERTING

Abis interface BSC

A interface

E interface MSC GMSC

PSTN

CC(FACCH)
DATA IND <ALERT> ALERTING (DT1) T310 T301 + DTAP-CC ACM(TUP)

CC(FACCH)

CONNECT

T313 + ACM(TUP) DATA IND <CONNECT> CONNECT (DT1) T301 ANC(TUP)

DTAP-CC

CONNECT ACK (DT1) DTAP-CC

ANC(TUP)

DATA REQ <CONNECT ACK>

CC(FACCH)

CONNECT ACK T313 -

MS Terminated Call Procedure Continue 6 (Mobile Release First) MS Um BTS Abis BSC A MSC E GMSC PSTN

CC(FACCH)

DISCONNECT DATA IND <DISC> DISCONNECT(DT1) DTAP-CC CBK