ZTE Corporation ZXG-BTS2 Benutzerhandbuch
Chapter 4 - System Functions
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F
I G U R E
3 2
P
R O C E D U R E O F
E
S T A B L I S H I N G A N
M S - O
R I G I N A T E D
L
I N K
MS
LAPD
FURRM
HPIMan
LAPD
BSC
OAMM
Dm_DL_EST_IND
DL_DATA_REQ (EST IND)
DL_DATA_IND
(EST IND)
(SABM)
Set Timer
MPH_CHPIndToRR
(CHP
SYNCHRONIZED)
DL_DATA_REQ(CONN FAIL IND )
(CONN FAIL IND)
kill Timer
The BTS gives the BSC an indication that one multi-frame-mode L2 link
has been established on the wireless path.
During the paging, the GSM04.08 message PAGING RESPONSE will be
contained in DL_EST_IND and sent to the BTS.
After the FURRM module sends the EST IND message, if the current
channel is the TCH activated in the service mode, the synchronization
timer will be enabled to wait for the synchronization between CHP and TC.
If the synchronization is not implemented till the timer expires, the FURRM
timer will be enabled to wait for the synchronization between CHP and TC.
If the synchronization is not implemented till the timer expires, the FURRM
sends the CONN FAIL IND message to the BSC, to wait for the BSC to
release the channel where the conversation cannot be established
release the channel where the conversation cannot be established
normally.
The link establishing flow originated by the BSC is shown in Figure 33.