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ZTE Corporation ZXG-BTS2 Manuale Utente

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ZXG10-BTS (V2.9) Technical Manual 
64 
Confidential and Proprietary Information of ZTE CORPORATION  
The procedure of transmitting a L3 transparent message from the MS is 
shown in Figure 41. 
F
I G U R E  
4 1
 
R
E C E I V I N G   A  
L 3   T
R A N S P A R E N T  
M
E S S A G E   I N   T H E  
N
O N
- A
C K N O W L E D G M E N T  
M
O D E
 
 
MS 
LAPD
FURRM 
HPIMan 
LAPD 
BSC 
OAMM 
(UI frames) 
 Dm_DL_UNIT 
DATA_IND 
DL_DATA_REQ 
(UNIT DATA IND) 
(UNIT DATA IND) 
 
 
The BSC 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 BTS activate a dedicated channel for an MS. When the channel is 
activated successfully, the BSC has the MS handed over to this channel 
through an assignment command or handover command. 
2. Channel mode change procedure: With this procedure, the BSC 
requests the BTS to change the mode of an activated channel. 
3.  Handover detection procedure: This procedure is used by the target 
BTS and target BSC to detect the access of a handed-over MS. 
4. Start encryption procedure: This procedure is used to start the 
encryption procedure stipulated by the TS GSM 04.08. 
5. Measurement report procedure: It includes the mandatory basic 
measurement report procedure and optional preprocessed 
measurement report procedure. These two procedures are used by the 
BTS to report all the parameters related to the handover decisions to 
the BSC. 
6.  SACCH deactivation procedure: This procedure is used by the BSC to 
deactivate the TRX related SACCH according to the requirements of the 
channel release procedure in the TS GSM 04.08. 
7. Radio channel release procedure: With this procedure, the BSC 
instructs the BTS to release a radio link that is not used any longer. 
8.  MS power control procedure: With this procedure, the BSS controls the 
transmitting power of the MS related to a specific activated channel.