RoamHBA: maintaining group connectivity in sensor networks

  • Authors:
  • Qing Fang;Jie Li;Leonidas Guiba;Feng Zha

  • Affiliations:
  • Stanford University, Stanford, CA;Palo Alto Research Center, Palo Alto, CA;Stanford University, Stanford, CA;Palo Alto Research Center, Palo Alto, CA

  • Venue:
  • Proceedings of the 3rd international symposium on Information processing in sensor networks
  • Year:
  • 2004

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Abstract

This paper presents a new group communication scheme, roamingcast, for collaborative information processing in wireless sensor networks. Roamingcast enables efficient communication among a subset of mobile terminals in a collaboration group. Unicast and multicast communication can be considered as special cases of roamingcast in which the subset contains one and all group members, respectively. We propose a Roaming Hub Based Architecture (RoamHBA, pronounced as 'rumba') as one solution to support roaming-cast. We present the distributed construction and dynamic update of a multicast tree, referred as the roaming hub. This roaming hub has the property that an average pair of terminals communicate using the hub with only constant degradation in path length compared to the best possible path. We have developed network layer protocols implementing this mechanism and evaluated their performance in comparison with roaming restricted flooding. We simulated our design using NS-2.