Reference Manual

Broadcast
21.3.4 Reception of SACCH_FILLING from BSC
By means of the SACCH FILLING INFORMATION MODIFY
procedure GSM:08.58, the BSC sends System Information 5, 5bis and 6
to be used on all SACCHs handled by a transceiver (TRX).
The RBS supports:
•
Interpretation and check of the SACCH_FILLING message from
the BSC
• Storage and update of System Information 5, 5bis and 6 from the
BSC
System Information is included in the SACCH_FILLING used for all
SACCHs in one TRX. New System Information received is used in
SACCH transmissions when scheduled.
Transmission of a specific System Information message can be stopped
by a SACCH_FILLING message GSM:08.58 sent from the BSC.
21.3.5 Broadcast of System Information on SACCH
The RBS supports scheduled transmission of System Information on the
SACCH channel GSM:04.18.
Reception of System Information from the BSC for all channel groups
within a TRX is described in the section above. Reception of System
Information for one particular channel group is described in chapter
Call Control.
Supported logical channels GSM:05.02:
SACCH Slow Associated Control Channel
Supported channel combinations GSM:05.02:
• (i) TCH/F + FACCH/F + SACCH/TF
• (ii) TCH/H (0, 1) + FACCH/H (0, 1) + SACCH/TH (0, 1)
• (v) FCCH + SCH + BCCH + CCCH + SDCCH/4 (0..3) +
SACCH/C4 (0..3)
•
(vii) SDCCH/8 (0..7) + SACCH/C8 (0..7)
•
(iii) TCH/H (0, 0) + FACCH/H (0, 1) + SACCH/TH (0, 1) +
TCH/H (1, 1) (only hardware supported)
LAPDm frames GSM:04.06 (format type B) are used for transmission
of System Information on SACCH.
The RBS changes System Information message type for every
transmission occasion according to the table below.
226 (485)
EN/LZT 720 0008 P2A
2001-11-28
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