5.2a Extended Coverage broadcast control channel (EC-BCCH)

3GPP45.003GSM/EDGE Channel codingRelease 17TS

5.2a.1 Block constitution

The message delivered to the encoder has a fixed size of 184 information bits {d(0),d(1),…,d(183)}.

5.2a.2 Coding

The message is coded as for SACCH as specified in subclause 4.1, resulting in the bursts e(B,j), B=0,1,2,3 and j = 0,1,…,115.

5.2a.3 Blind physical layer transmission

Each burst is transmitted 16 times. Denote the resulting bursts of transmission m as R(m,B,j) = e(B,j) for m=0,…,15, B=0,1,2,3 and j=0,…,115.

5.2a.4 Mapping onto a physical channel

Burst R(m,B,j), j=0…,115, is mapped onto burst B’ of the timeslot carrying the EC-BCCH, where

B’ = B + 4m

NOTE: The burst number B’ denotes the relative transmission order of the bursts on the timeslot. The mapping to absolute TDMA frame number is specified in 3GPP TS 45.002 [8].