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ZTE Corporation ZXG-BTS2 Manuale Utente

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Chapter 4 - System Functions 
Confidential and Proprietary Information of ZTE CORPORATION 75 
The BTS reports the basic wireless measurement results (GSM 05.08 
and GSM 05.05) that are generated by the MS and TRX. 
This procedure is a default procedure, unless another plan 
(preprocessing, as described below) is used. 
The TRS places these results in the MEAS RES message and reports to 
the BSC. The sending of this message is synchronous with the 
receiving of the SACCH block from the MS. If this uplink SACCH block 
does not contain the measurement report from the MS (in case of short 
messages, for example), the MEAS RES that  is  sent  by  the  BTS  will 
indicate this. 
The procedure of measurement report preprocessing is shown in Figure 
52. 
F
I G U R E  
5 2
 
M
E A S U R E M E N T  
R
E P O R T  
P
R E P R O C E S S I N G
 
 
MS 
LAPD
FURRM 
HPIMa
LAPD 
BSC 
OAMM 
Dm_DL_UNIT 
DATA_REQ 
(MEAS REP) 
(MEAS REP) 
DL_DATA_REQ (PREPROC 
MEAS RES) 
(PREPROC  
MEAS RES)   
MPH_CHPIndToRR 
(CHP MEAS IND) 
(CHP SET TA) 
 
 
The BTS first preprocesses the MS measurement report, and then 
sends it together with the BTS measurement result to the BSC through 
the PREPROC MEAS RES message. 
2. Power control 
The MS power control is shown in Figure 53. 
F
I G U R E  
5 3
 
M S   P
O W E R  
C
O N T R O L
 
 
MS 
LAPD
FURRM 
HPIMa
LAPD 
BSC 
OAMM 
(MS POWER 
CONTROL)  
DL_DATA_IND (MS POWER 
CONTROL) 
MPH_RRCmdToCHP 
(CHP SET MS 
POWER) 
 
 
The BSC sets the MS power control parameters according to the TRX 
requirement. 
The initial parameters are set in the CHAN ACTIV message by the BSC. 
If these parameters are to be changed, the BSC will send the MS 
POWER CONTROL message to the TRX.