REEC: Reliable Multicast in Mobile Wireless Ad Hoc Networks

Multicasting, which is a one-to-many communication, is motivated by the increasing importance of real-time and multimedia applications with different QoS requirements. This paper presented a non-uniform distributed hash function for wireless ad hoc networks. This function allocates a unique interval to the receiver nodes based on the path weight and the random speed of nodes. This allocation leads to a reduction in the collision of the duplicate multicast packets. This function is used in a multicast weighted tree. The problem of allocating intervals to wireless ad hoc nodes is considered among the NP-Hard problems. Simulation results revealed that the REEC protocol leads to an increase in the rate of packet delivery rate, a decrease in collisions, and a reduction in the average end-to-end delays. Simulation results show that the use of this hash function in the weighted multicast tree leads to 14% decrease in the packet collision rate and 34% increase in the packet delivery rate. It also reduces the average end-to-end delays by 20%.