Characterizing the Stability Region of IEEE 802.11 Distributed Coordination Function - Part II: A Multi-channel Perspective
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چکیده
In this paper, we characterize the stability region of IEEE 802.11 DCF from a multi-channel perspective. The fundamental conceptual issue accompanying channelization is the notion of channel-switching scheduling policy which introduces a channeloccupancy distribution of each node. We show that channelization is heuristically equivalent to expanding the average backoff window in shaping the stability region. Hence, the convexity of stability region of a multi-channel system under 802.11 DCF is almost ubiquitous. Also, as a result of the comparison among stability regions of different scheduling policies, the existence of throughput-optimal policy is inquired, and some preliminary results on this aspects are also presented.
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تاریخ انتشار 2011