Almost optimal distributed M2M multicasting in wireless mesh networks

  • Authors:
  • Qin Xin;Fredrik Manne;Yan Zhang;Xin Wang

  • Affiliations:
  • Faculty of Science and Technology, University of the Faroe Islands, Torshavn, Faroe Islands and Department of Computer Science, University of Copenhagen, Copenhagen, Denmark;Department of Informatics, The University of Bergen, Bergen, Norway;Simula Research Laboratory, Oslo, Norway;Department of Electrical and Computer Engineering, State University of New York at Stony Brook, USA

  • Venue:
  • Theoretical Computer Science
  • Year:
  • 2012

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Abstract

Wireless Mesh Networking (WMN) is an emerging communication paradigm to enable resilient, cost-efficient and reliable services for the future-generation wireless networks. In this paper, we study the problem of multipoint-to-multipoint (M2M) multicasting in a WMN which aims to use the minimum number of time slots to exchange messages among a group of k mesh nodes in a multi-hop WMN with n mesh nodes. We study the M2M multicasting problem in a distributed environment where each participant only knows that there are k participants and it does not know who are other k-1 participants among n mesh nodes. It is known that the computation of an optimal M2M multicasting schedule isNP-hard. We present a fully distributed deterministic algorithm for such an M2M multicasting problem and analyze its time complexity. We show that if the maximum hop distance between any two out of the k participants is d, then the studied M2M multicasting problem can be solved in time O(dlog^2n+klog^3nlogk) with a polynomial-time computation, which is an almost optimal scheme due to the lower bound @W(d+klognlogk) given by Chlebus et al. (2009) [5]. Our algorithm also improves the currently best known result with running time O(dlog^2n+klog^4n) by Gasieniec et al. (2006) [13]. In this paper, we also propose a distributed deterministic algorithm which accomplishes the M2M multicasting in time O(d+k) with a polynomial-time computation in unit disk graphs. This is an asymptotically optimal algorithm in the sense that there exists a WMN topology, e.g., a line, a ring, a star or a complete graph, in which the M2M multicasting cannot be completed in less than @W(d+k) units of time.