An evolutionary-dynamic TDMA slot assignment protocol for ad hoc networks

In this paper, we propose an evolutionary-dynamic TDMA slot assignment protocol (E-DTSAP) for ad hoc networks. According to the topology density of the network and the bandwidth requirement, our proposed protocol changes the frame length and the transmission schedule dynamically. Moreover, it allows the transmitter to reserve one or more unscheduled slots from the set of unassigned slots in its neighborhood by coordinating the announcement and confirmation with the neighboring nodes up to two hops away. The important sections of the proposed protocol including frame format, packet format and slot assignment are presented and analyzed. The simulation results show that our proposed protocol is better than the conventional second category MAC protocols and 802.11.