A novel multiple access scheme in wireless multimedia networks with multi-packet reception

摘要

Recent advances in signal processing techniques have enabled wireless networks to have multi-packet reception (MPR) capability at the physical layer, where it is possible to receive one or more packets when concurrent transmissions occur. In this paper, we propose the novel multi-reservation multiple access (MRMA) scheme for future wireless multimedia networks based on such an MPR channel model, which fully exploit the channel's MPR capacity while fulfilling the quality of service (QoS) requirements of different multimedia traffic. MRMA employs a centralized reservation mechanism to control the number of simultaneous packets transmitted in each time slot to satisfy a traffic class' packet loss ratio requirement. Moreover, MRMA incorporates an efficient adaptive random access method and a priority control mechanism to provide guaranteed and best-effort services for real time voice/video traffic and connectionless data traffic, respectively. Simulation and analytical results are presented to illustrate the effectiveness of the proposed scheme.