Distributed Approximation Algorithms for Longest-Lived Multicast in WANETs with Directional Antennas

Song Guo, Victor Leung, Xiaohong Jiang
2010 IEEE Transactions on Wireless Communications  
We consider the lifetime optimization problem for multicasting in wireless ad hoc networks, in which each node is equipped with a directional antenna and has limited energy supplies. Several distributed algorithms proposed recently are especially beneficial to a resource-constrained wireless ad hoc network. In this paper, we propose a new distributed algorithm and investigate its theoretical performance compared to existing distributed algorithms. We use a graph theoretic approach to obtain the
more » ... upper bound of the approximation ratio for a group of distributed algorithms. In particular, the derived upper bound in a closed form for each algorithm provides a sufficient condition to determine if the obtained solutions can reach optimum. Both theoretical and experimental performance analysis show that the new algorithm outperforms other proposals in terms of providing long-lived multicast tree. Index Terms-Wireless ad hoc network, approximation algorithm, multicast, directional antenna.
doi:10.1109/twc.2010.07.090897 fatcat:3ufitnb2orf23cmpb63ic7o2gm