Multipoint Relaying: An Efficient Technique for Flooding in Mobile Wireless Networks

In this paper we discuss the mechanism of multipoint relays (MPRs) to efficiently do the flooding of broadcast messages in the mobile wireless networks. Multipoint relaying is a technique to reduce the number of redundant re-transmissions while diffusing a broadcast message in the network. We discuss the principle and the functioning of MPRs, and propose a heuristic to select these MPRs in a mobile wireless environment. We also analyze the complexity of this heuristic and prove that the computation of a multipoin- t relay set with minimal size is NP-complete. Finally, we present some simulation results to show the efficiency of multipoint relays