5 Functional contents

08.563GPPBSC-BTS Layer 2SpecificationTS

The basic functional content of the layer 2 protocol is:

– transparent layer 2 links and time fill;

– point-to-point dedicated layer 2 links addressing both physical entities and functional entities;

– point-to-multipoint addressed links used for layer 2 management;

– basic functions for TEI assignment and management;

– basic priority functions;

– basic supervision of links when not carrying traffic;

– sequence control;

– transmission error control;

– control of errors not recoverable by retransmission.