ZTE Corporation ZXG-BTS2 Benutzerhandbuch
Chapter 4 - System Functions
Confidential and Proprietary Information of ZTE CORPORATION 83
F
I G U R E
6 4
B
R O A D C A S T
I
N F O R M A T I O N
2 ( S A C C H F I L L ) C
H A N G E
P
R O C E D U R E
MS
LAPDm
FURRM
HPIMa
LAPD
BSC
OAMM
DL_ DATA_IND (SACCH FILL)
(SACCH FILL)
MPH_ RRCmdToCHP
(CHP SET/STOP
SACCH FILL )
(SYS INFO TYPE 5/6/5bis)
The BSC indicates to the BTS that the new system information ((RR)
System Information Type 5/6/5bis/5ter) will be sent in the downlink
SACCH as fill-in information, generally when channel connection starts
SACCH as fill-in information, generally when channel connection starts
(especially after a handover) and the channel changes.
When the FURRM receives the SACCH FILL message, it takes out the
information unit and sends it to the CHP module for the system message
transmission. If it does not receive the message, it indicates that the
transmission. If it does not receive the message, it indicates that the
system message sending will stop.
The System Information Type 5 contains the adjacent cell BCCH frequency
table. The System Information Type 5bis and System Information Type
table. The System Information Type 5bis and System Information Type
5ter contain adjacent cell BCCH extended configuration information. The
System Information Type 6 contains the location area ID and cell ID.
System Information Type 6 contains the location area ID and cell ID.
When the fill-in information uploaded in the SACCH needs to be changed,
the BSC will send a SACCH INFO MODIFY message to the BTS. The SACCH
the BSC will send a SACCH INFO MODIFY message to the BTS. The SACCH
fill-in information in this message will be transmitted in the specified
channel, till the channel is released or changed by another SACCH INFO
channel, till the channel is released or changed by another SACCH INFO
MODIFY message.
TRX Management Function
This function supports the following procedures:
1. Radio resource indication procedure: With this procedure, the BTS
gives the BSC an indication of interference level on the idle dedicated
channel of each TRX.
channel of each TRX.
2. Flow control procedure: The FUC indicates overload of this TRX to the
BSC, including the following possible causes: CCCH overload, ACCCH
overload and processor overload.
overload and processor overload.
3. Error report procedure: With this procedure, the BTS reports to the
BSC the detected downlink message error that cannot be reported with
other procedures.
Radio Resource Indication
The radio resource indication is shown in Figure 65.