Asymptotic delay analysis and timeout-based admission control for ad hoc wireless networks with asymmetric users

In this paper, we present an analytical model for an approximate calculation of the end-to-end delay performance in multi-hop wireless ad hoc networks. In contrast to literature that largely focuses on average delay, our paper focuses on the distribution of end-toend delay. In this paper, we assume that each source injects packets in the network, which traverse intermediate nodes until they reach the destination. Firstly, we employ discrete-time queueing theory to derive the expressions for the queue length and the delay in terms of probability generating functions. Secondly, in order to improve the control routing and transmission scheduling, we adopt a cross-layer design that allows information sharing across different layers for efficient utilization of network resources, and meeting the end-to-end performance requirements of demanding applications. Thirdly, we propose a packet admission control scheme based on delay timeout mechanism. This guarantees quality of service for multimedia applications such as voice and video streaming Finally, we conduct extensive simulations in order to verify our analytical results. (C) 2010 Elsevier B V All rights reserved.