1

Abstract—Many applications in mobile ad hoc network such as battlefield applications, rescue applications, conferences, multi-user games, and context-aware applications require group communication. To support group communication in mobile ad hoc networks, various multicast protocols have been proposed. These protocols ’ goal is to deliver multicast packets to all group members efficiently and reliably. The problem in these protocols is that multicast packet delivery paths become fragile with respect to mobility when they try to be optimal in reducing the transmission cost and they are not optimal if it is made to be resilient to mobility. To keep some reliability without deteriorating much efficiency, we use MPR (multi point relay) which is base mechanism of OLSR, one of the main RFCs in IETF Manet WG. MPR will be used in selecting multicast paths for tree, mesh or forwarding set. Simulations show the efficiency and reliability of multicasting could be improved utilizing MPR. Lastly we present the implementation design of multicast based on MPR over Linux