Research On Scheduling Algorithms In IEEE802.15.3 Wireless Personal Area Network

In this paper, we consider the performances in terms of system throughput and re-sponse time of various channel-aware scheduling algorithms for both MPEG streams and non-MPEG flows in high-data-rate (HDR) wireless personal area network (WPAN). The algorithms under investigation are the shortest remaining processing time (SRPT) rule, the exponential (EXP) rule, the modified largest weighted delay first (M-LWDF) rule, the maximum rate (MAX-RATE) rule, and the proportionally fair (PROP-FAIR) rule. Decod-ability issues are taken care of by means of the frame-decodability aware technique and the burst transfer eligibility decision mechanism. The impacts of a number of factors including deadline, interference-plus-noise level and MPEG GOP pattern are also examined.Based on the investigations, we propose a heuristic scheduling algorithm for MPEG streams. The impact of a controlling parameter upon system performances of our proposed heuristic channel-aware scheduling algorithm is studied. In addition, parameter optimiza-tion for a combined performance measure is also discussed. The results show that the pro-posed algorithm uniformly performs better than other algorithms, with the performance gain being more evident for bad channel.These investigations are carried out through extensive ns-2 simulations. The findings are useful for system designers.