Zte ZXG10-OB06, Техническое руководство

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Chapter 4 - System Functions
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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
Figure 55 shows the broadcast information 2 (SACCH FILL) change
procedure.
F
I G U R E
5 5 – 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
The BSC indicates OB06 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, it is sent when channel connection starts
(especially after a handover) and the channel changes.
When FURRM receives SACCH FILL message, it extracts the information
unit and sends it to CHP module for the system message transmission. If it
does not receive the message, it indicates to stop system message
sending.
The System Information Type 5 contains the adjacent cell BCCH frequency
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.
When the fill-in information uploaded in the SACCH needs to be changed,
the BSC sends a SACCH INFO MODIFY message to OB06. SACCH fill-in
information in this message transmits in the specified channel, until the
channel is released or changed by another SACCH INFO MODIFY message.
TRX Management Function
This function supports the following procedures:
• Radio resource indication procedure: With this procedure, the OB06
gives BSC an indication of interference level on the idle dedicated
channel of each TRX.
• Traffic control procedure:: With this procedure, the FUC gives BSC an
indication about the overload of this TRX. The overload cause may be
CCCH overload, ACCH overload or processor overload.
• Error report procedure: With this procedure, the OB06 reports BSC
about the detected downlink message error that cannot be reported
with other procedures.