Reference Manual

Broadcast
Table 112 Mapping of BCCH data
TC
No 2bis, no 2ter 2bis, no 2ter No 2bis, 2ter 2bis, 2ter
0
1 (3) 1 (3) 1 (3) 1 (3)
1 2 2 2 2
2 3 3 3 3
3 4 4 4 4
4 13 (3) 13 (3) 13 (3) 2ter, 13
5 2 2bis 2ter 2bis
6 3 3 3 3
7 4 4 4 4
Table 113 The BCCH Extended System Information schedule
TC Type
2 17
3 8
0 13
6 16
7 7
The BCCH Extended blocks only exist if System Information 7, 8, 13,
16 and 17 are loaded.
For BCCH blocks, where no System Information (1-4) is defined, "fill
frames" /GSM:04.06:5.4.2.3/ are transmitted.
15.3.4 Reception of SACCH_FILLING from BSC
By means of the SACCH FILLING INFORMATION MODIFY
procedure /GSM:08.58:6.2/, the BSC sends System Information 5, 5bis
and 6 to be used on all SACCHs handled by a TRX (tranceiver).
The RBS supports:
•
Interpretation and check of the SACCH_FILLING message from
BSC
• Storage and update of System Information 5, 5bis and 6
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:08.58:8.5.1/ on order from the
BSC.
15.3.5 Broadcast of System Information on SACCH
The RBS supports scheduled transmission of System Information on the
SACCH channel /GSM:04.08:3.2.2.1/.
Reception of System Information from the BSC for all channel groups
within a TRX is described in the section above. Reception of System
EN/LZT 720 0008 R1A
2001-06-26
163 (421)
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