Joint channel assignment and space-division multiple access scheduling in wireless mesh networks

Dawei Gong, Miao Zhao, Yuanyuan Yang

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

In recent years, wireless mesh networks (WMNs) have been widely deployed to provide wireless access to the Internet. However, due to inter-link interference, the aggregated capacity of WMNs is limited, even with multiple channels. As a result, many links in WMNs are suppressed since interfering links cannot be active (i.e., transmitting packets) simultaneously. In this paper, we propose a joint design of channel assignment and space-division multiple access (SDMA) technique with the objective of maximizing the number of active links in WMNs. We assign different channels to transmission links based on their interference relationship to alleviate the interference. We also apply the SDMA technique to link scheduling, which enables two interfering links that share the same destination to communicate simultaneously on the same channel. By utilizing SDMA, more concurrent transmission links can be accommodated such that the network capacity can be greatly improved. We formulate this joint design into an optimization problem, prove its NP-hardness and then provide two heuristic algorithms to give practically solutions to the problem. Our simulation results demonstrate that the performance of the two heuristic algorithm is close to the optimal solution, and when 90% of SDMA pairs are compatible, the proposed algorithms can increase the percentage of active links in a WMN by up to 40% as compared to non-SDMA schedules.
Original languageEnglish
Title of host publication2010 IEEE Wireless Communications and Networking Conference, WCNC 2010 - Proceedings
DOIs
Publication statusPublished - 3 Aug 2010
Externally publishedYes
EventIEEE Wireless Communications and Networking Conference 2010, WCNC 2010 - Sydney, NSW, Australia
Duration: 18 Apr 201021 Apr 2010

Conference

ConferenceIEEE Wireless Communications and Networking Conference 2010, WCNC 2010
CountryAustralia
CitySydney, NSW
Period18/04/1021/04/10

ASJC Scopus subject areas

  • Engineering(all)

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