(An) efficient medium access control scheme for wireless multimedia networks

Abstract

In this thesis, we propose a medium access control scheme for wireless ATM network. Recent years have seen the deployment of a large number of multiple access protocols for the integrated wireless network, whether a simple integration between voice and data for a wireless ATM network. However, with theses protocols, the MT suffers from a serious random access delay for reservation at heavy load, which does not guarantee the QoS requirement of the stringent ATM services. Our scheme aims to satisfy the delay constraint of the various wireless ATM connections to guarantee QoS in TDMA/TDD system. In the proposed scheme, the number of reservation requests messages generated by a MT during a contention period depends on each traffic class with different QoS. That is, as a real-time traffic source generates more requests than a non-real time source, this scheme increases the chance of success for the real-time traffic requests. In this way, the low random access delay is ensured for real-time traffic. The performance results show that random access delay in the proposed scheme is lower than that of other schemes with various traffic loads and ratios of real-time traffic users to total users.