NDLI: An adaptive contention-based scheduling scheme for proportional service differentiation in multichannel wireless networks

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An adaptive contention-based scheduling scheme for proportional service differentiation in multichannel wireless networks

Content Provider	ACM Digital Library
Author	Ganz, Aura Pandey, Sugam
Abstract	In this paper, we propose an adaptive contention-based MAC scheduling scheme called Multi-channel Contention-based TDMA (MC/TDMA) for Multichannel wireless networks which provides proportional service differentiation while achieving high resource utilization. The MC/TDMA scheme adaptively schedules the traffic over multiple non-overlapping channels by controlling the number of competing nodes on a common channel based on the system load. The scheduling problem of MC/TDMA scheme is solved in two phases. The first phase called the Timeslot Allocation phase is reduced to a modified open-shop scheduling problem which allows us to use known efficient open-shop scheduling algorithms. For the second phase called Channel Allocation Phase, which is a non-convex Non-linear Programming (NL-P) problem (an NP-Hard problem) we develop a greedy heuristic. In order to maximize the utilization of the network resources while achieving proportional service differentiation, we propose a tuning knob called the collision factor 'a' which can be adaptively adjusted based on the network load. Through extensive simulations using OPNET we show that the proposed MC/TDMA scheme can provide proportional service differentiation in a multichannel wireless network while optimizing the utilization of the network resources.
File Format	PDF
ISBN	1595935371
DOI	10.1145/1185373.1185436
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2006-08-07
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Wireless Multichannel Qos Diffserv Adhoc
Content Type	Text
Resource Type	Article

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