Stability conditions for a two-priority packet broadcast channel

Sufficient conditions for the stability of the two-priority, virtual time CSMA packet broadcast channel are developed. The results are in the form of inequalities which define stable operating regions for the channel in terms of its parameters. In particular, for given packet arrival rates, packet lengths, and a collision detection time for the two traffic types, one is able to determine retransmission controls and virtual time clock rates which stabilize the channel.