Finding Multiple Length-Bounded Disjoint Paths in Wireless Sensor Networks ()

In a wireless sensor network, routing messages between two nodes *s* and *t* with multiple disjoint paths will increase the throughput, robustness and load balance of the network. The existing researches focus on finding multiple disjoint paths connecting *s* and *t* efficiently, but they do not consider length constraint of the paths. A too long path will be useless because of high latency and high packet loss rate. This paper deals with such a problem: given two nodes *s* and *t* in a sensor network, finding as many as possible disjoint paths connecting *s* and *t* whose lengths are no more than *L*, where *L* is the length bound set by the users. By now, we know that this problem is not only NP hard but also APX complete [1,2], which means that there is no PTAS for this problem. To the best of our knowledge, there is only one heuristic algorithm proposed for this problem [3], and it is not suitable for sensor network because it processes in a centralized way. This paper proposes an efficient distributed algorithm for this problem. By processing in a distributed way, the algorithm is very communication efficient. Simulation results show that our algorithm outperforms the existing algorithm in both aspects of found path number and communication efficiency.

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K. Zhang and H. Gao, "Finding Multiple Length-Bounded Disjoint Paths in Wireless Sensor Networks," *Wireless Sensor Network*, Vol. 3 No. 12, 2011, pp. 384-390. doi: 10.4236/wsn.2011.312045.

Conflicts of Interest

The authors declare no conflicts of interest.

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