Synchronization channel

This channel acts as a base to the mobile channel. The mobile channel carries the information for identification and frame synchronization of the base station transceiver.

It also comprises the frame number in relation to the hyper frame and the BASIC ( Base station identity code ).

In the frame that after the FCCH, in time slot TS0 BTS transmit with SCH. The SCH has a unique burst structure. It comprises of 64-bit binary sequence that is common throughout the GSM networks.

The BASIC is assigned to each BTS in the GSM system. The SCH is transmitted once every ten frames within the control channel multi-frame.
Synchronization burst structure