As shown above, CCCH=PCH+RACH+AGCH; downlink
CCCH=PCH+AGCH; and uplink CCCH=RACH. In the above combinations, combination 3
and 4 must be allocated to slot 0 of the BCCH carrier configured for the cell;
while combination 5 must be allocated to timeslots 2, 4 and 6 of the BCCH
carrier. The FACCH works in the frame stealing mode, for which no fixed time
sequence will be allocated. In addition, the cyclic multiframe period of
SACCH/C4 and SACCH/C8 is 102 frames.
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