Broadcast
2 3 3 3 3
3 4 and 8 4 and 8 4 and 8 4 and 8
4 3 3 3 2ter
5 2 2bis 2ter 2bis
6 3 3 3 3
7 4 and 7 4 and 7 4 and 7 4 and 7
Types 7 and 8 are sent on the BCCH Extended channel when they are
loaded.
For BCCH blocks, where no System Information (1-4) is defined, "fill
frames" /GSM:04.06:5.4.2.3/ are transmitted.
7.3.4 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.
7.3.5 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
Information for one particular channel group is described in chapter
“Call Control”, see table of contents.
Supported logical channels /GSM:05.02:3.3.4/:
SACCH Slow Associated Control Channel
Supported channel combinations /GSM:05.02:6.4/:
• (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)
LAPDm frames /GSM:04.06:2.1 (format type B)/ are used for
transmission of System Information on SACCH.
EN/LZT 123 2697 R5A
1998-08-13
93 (306)
© Ericsson Radio Systems AB
— All Rights Reserved —
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