Abstract
Cooperative retransmission scheme is used to reduce the probability of the packets retransmission from sender to receiver and result in increasing network throughput. In this paper, we propose a cooperative MAC protocol to improve the network performance in mobile ad hoc networks. In the proposed protocol, we can add an extra relay node between sender and receiver if the sender cannot send frames to the receiver reliably. On the other hand, a receiver can be bypassed if transmission frames can be received by next two-hop receivers. Therefore, our protocol cannot only improve the transmission reliability but reduce the routing delay time. Simulation results show that the performance of our protocol is better than previous work.