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The procedure of transmitting a L3 transparent message from the MS is
shown in Figure 32.
F
3 2 R
I G U R E
E C E I V I N G A
M
O D E
MS
LAPDm
(UI frames)
Dm_DL _UNIT
DATA_ IND
The OB06 transfers to the BSC with the non-acknowledgment mode L3
transparent message that is received from MS.
UNIT DATA IND message contains the complete non-acknowledgment
mode L3 transparent message.
Dedicated Channel Management Function
This function supports the following procedures:
1. Channel activation procedure: This procedure allows the BSC to make
the OB06 activate a dedicated channel for an MS. When the channel is
activated successfully, the MS is handed over to this channel through
an assignment command or handover command.
2. Channel mode change procedure: This procedure allows the BSC to
request the OB06 to change the mode of an activated channel.
3. Handover detection procedure: This procedure is used to check the
access of a handed-over MS between the target OB06 and target BSC.
4. Encryption start procedure: This procedure is used to start the
encryption procedure specified in TS GSM 04.08.
5. Measurement report procedure: It includes the mandatory basic
measurement
report
measurement report procedure. These two procedures are used by the
OB06 to report all the parameters related to the handover decisions to
the BSC.
6. SACCH deactivation procedure: This procedure allows the BSC to
deactivate SACCH channels of the TRX according to the requirements
of the channel release procedure in TS GSM 04.08.
7. Radio channel release procedure: This procedure allows the BSC to
instruct the OB06 to release a radio channel that will not be used any
longer.
8. MS power control procedure: This procedure allows the BSS to control
the transmitting power of the MS related to a specific activated channel.
L 3 T
M
R A N S P A R E N T
E S S A G E I N T H E
HPIMan
FURRM
DL_ DATA_REQ
(UNIT DATA IND )
procedure
and
Confidential and Proprietary Information of ZTE CORPORATION
Chapter 4 - System Functions
N
- A
O N
C K N O W L E D G M E N T
BSC
LAPD
(UNIT DATA IND )
the
optional
preprocessed
OAMM
47
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