ABSTRACT
All these protocols are based on a central controller (located at the head-end in HFC and at the base station controller in WATM/GPRS networks), and signifi cantly for this study of deadlock analysis, all employ the concept of collisionbased reservation channels. Naturally, implementation differences exist between these diverse systems, but from the point of view of a network user with data to transmit, the generic paradigm adopted by all the MAC protocols we are consider ing, as alluded to above, relies on two phases:
1. Contention resolution, where the station competes with other stations by using a collision-prone signalling channel, in order to attempt to reserve capacity on a data channel.
