Access strategies in packet mobile radio data networks

This paper examines alternative shared channel access procedures for mobile packet radio data/voice systems. Natural pauses in speech allow the possibility of bandwidth savings through interleaving of talkspurts from many sources, as is done in packet data systems. The acceptability of such schemes lies in the resulting performance level; inevitable degradation through delay and blocking should be small. Access procedures are outlined for a two hop virtual circuit in which a fixed base station acts as a relay transmitter. Analysis shows that a reduction of 30–35% in bandwidth requirements can be obtained without serious performance loss.