AN EFFICIENT WIRELESS VOICE DATA INTEGRATED ACCESS ALGORITHM IN NOISYCHANNEL ENVIRONMENTS/

In this paper, an efficient voice/data integrated access algorithm for future personal communication networks (PCNs) is proposed and analyze d based on an equilibrium point analysis (EPA) method. A practical wir eless communication channel may be impaired by noise and multipath dis tortion, and thus corrupted real-time packets have to recompete immedi ately in order to be transmitted within the stringent delay constraint . Also, real-time traffic users have to transmit their packets irrespe ctive of the amount of non real-time data messages so that heavy non r eal-time traffic does not degrade the quality of real-time traffic. In the proposed algorithm, request subslots are distributed in the begin ning of every slot to reduce access delay of real-time traffic. Moreov er, slots are assigned to real-time traffic first and the remaining id le slots are assigned later to non real-time traffic by using the sche me of contention separation. We analyze the throughput and delay chara cteristics of this system based on an EPA method, and validate their p erformances by simulations. This scheme can support different quality of services (QoSs) imposed by different services efficiently and show good quality of real-time traffic, especially voice packets, no matter how heavy non real-time traffic is.