【资料名称】：GSM信令流程图

【资料作者】：mot

【资料日期】：2010-08-10

【资料语言】：英文

【资料格式】：XLS

【资料目录和简介】：

CALL ESTABLISHMENT (TO LAND)


MSL1ABISRRSMCRMSMSSMMTP/MSC
RACH channal
T3120requestok_acc_proc_suc_rach (could be decoded)
access_per_rach (all received)

channel
requestinv_est_cause_on_rach(included phantom)
channel
AGCH immediate assign. requestchan_req_cause_atmpt (1510)
"123 tone"rejectchannel
T3126 start T3122required received
expire T3122
channalchannel
requestassigned alloc_sdcch
busy_sdcch
RSS
channel activation

channel activetion
acknowledge

immediate assignment
AGCH immediatecommandstart T3101
assignment
access_per_agch (how many im_assign_cmd/rej was sent out, 1 msg may include upto 2 MS)
expire T3101
chan_req_ms_fail
SDCCH L2 SABMestabish indiction
T3230L3 (intial msg)CM service requeststop T3101
T303UA ok_acc_proc
(SDCCH)ms_access_by_type (1510)
initial L3 information
CM Service request<CR>
immediate assignment reject conn_req_to_msc
alloc_sdcch_fail
chan_req_ms_blkSCCP conn
classmark3(if needed)
<CC>

<CREF>
conn_refused
SDCCH setup
identity request (if MSC need more MS information)
identity responsecall setup
call proceeding (MSC have got enough information to setup the connection)
T310 facility (if MS have some supplementary services, such as call divert)

assignment
requeststart MSC timer for
ma_req_from_mscassignment, =30s
initiate assignmentmaybe efr_req_from_msc
start assign_successful
assignment resource expire MSC timer without
requestUDT(reset circuit)assignment complete' or
resouce not availableassignment failure'
alloc_tch_failexpire assign_successful
ma_cmd_to_ms_blkdassignment failure
unsuccessful assignment
assignment failure
force queue
start T11
assignment queued
queuing indication
expire T11release request
clear request
assignment channel clr_req_to_msc
assigned
stop T11
alloc_tch
physical context request tch_usage ….
physical context confirmed busy_tch
channel activation
channel activation ack.
SDCCH assignment command
start T10
ma_cmd_to_ms
expire T10release request clear request

assignment failure
ma_fail_from_ms
stop T10release request clear request

FACCH L2 SABM
UA
assignment completed
stop T10
assignment successful
stop assign_successfulPSTN
connection
required
connection response
successassignment complete
stop MSC timer for
total_callassignment
ma_complete_to_msc
(total call+intracellHO)IFAM (initial and final address)
ACM (address complete)
alerting

connect
conn ack. T313billing startbilling