NDLI: Interference-aware topology control and QoS routing in multi-channel wireless mesh networks

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Interference-aware topology control and QoS routing in multi-channel wireless mesh networks

Content Provider	ACM Digital Library
Author	Tang, Jian Xue, Guoliang Zhang, Weiyi
Abstract	The throughput of wireless networks can be significantly improved by multi-channel communications compared with single-channel communications since the use of multiple channels can reduce interference influence. In this paper, we study interference-aware topology control and QoS routing in IEEE 802.11-based multi-channel wireless mesh networks with dynamic traffic. Channel assignment and routing are two basic issues in such networks. Different channel assignments can lead to different network topologies. We present a novel definition of co-channel interference. Based on this concept, we formally define and present an effective heuristic for the minimum INterference Survivable Topology Control (INSTC) problem which seeks a channel assignment for the given network such that the induced network topology is interference-minimum among all K-connected topologies. We then formulate the Bandwidth-Aware Routing (BAR) problem for a given network topology, which seeks routes for QoS connection requests with bandwidth requirements. We present a polynomial time optimal algorithm to solve the BAR problem under the assumption that traffic demands are splittable. For the non-splittable case, we present a maximum bottleneck capacity path routing heuristic. Simulation results show that compared with the simple common channel assignment and shortest path routing approach, our scheme improves the system performance by 57% on average in terms of connection blocking ratio.
Starting Page	68
Ending Page	77
Page Count	10
File Format	PDF
ISBN	1595930043
DOI	10.1145/1062689.1062700
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2005-05-25
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Qos routing Channel assignment Topology control Wireless mesh network
Content Type	Text
Resource Type	Article

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