A dynamic TDMA-based MAC protocol with QoS guarantees for fully connected ad hoc networks
This paper presents DT-MAC, a dynamic TDMA based medium access control (MAC) protocol designed to offer collision-free transmissions while providing QoS guarantees for different services in scalable fully connected ad hoc networks. In DT-MAC, a new time frame structure which consists of synchronization, request, assignment and data slots is put forward. In each frame, the number of slots and their lengths are adaptively adjusted according to the number of nodes and their services in the network. Meanwhile, a distributed frame synchronization method is proposed to provide synchronization guarantee for the nodes and generate a manager node for each frame to dynamically allocate the slots according to the QoS requirements of different services. Besides, by introducing request slot, DT-MAC can make nodes join or leave the network without conflicts. Simulation results show that DT-MAC performs better in providing QoS guarantees and accommodating the change of network scale compared with conventional TDMA-based MAC protocols.
dynamic qos guarantees fully connected ad hoc networks scalable tdma protocol