GSM流程分析-呼叫流程-切换流程.xls

MS BTS BSC MSC
paging

(PCH) paging command
paging command C003000 PAGING_MSG_SENT
ccch_load_indica
EVERY 30S SEND C003038 DELETE_PAGING_COMMAND


channel request channel requried
(RACH) C003004 CH_REQ_MSG_REC

C001000 SDCCH_SEIZ_ATT (call)
C001135 SDCCH_MOC_SEIZ_ATT (call)
C001136 SDCCH_MTC_SEIZ_ATT (call)

C057017 SDCCH_REQ (except ho)
C057019 SERVED_SDCCH_REQ (succ res)

C003041 BCSU_OVERLOAD_DELETED_RACH
C003031 REJ_SEIZ_ATT_DUE_DIST
C003030 GHOST_CCCH_RES

C001001 SDCCH_BUSY_ATT
chan activation START T9103
act failure chan activat nack
RF chann Release
RF chan Rel ack
C001027 SDCCH_ACT_FAIL
C001072 SDCCH_ACT_FAIL_CALLL
immedia reject
immedia reject START T3122 C003002 IMM_ASSGN_REJ

RF chann Release T9103 Expire
RF chan Rel ack
C001002 SDCCH_BSS_FAIL
C001033 SDCCH_ABIS_FAIL
C001075 SDCCH_ABIS_FAIL_CALL
immedia reject
immedia reject START T3122 C003002 IMM_ASSGN_REJ

chan activa ack END T9103
immedia assign START T3101
C001007 SDCCH_ASSIGN (call)
Delete indication C003001 IMM_ASSGN_SENT
(AGCH) C003005 DEL_IND_MSG_REC
immedia assi