An enhanced cooperative MAC protocol (ECoopMAC) is proposed for multi-hop Ad Hoc networks in this paper

which considers the transmission rate and the hidden node problem jointly.Through optimizing the order of handover and the strategy of helper selection

the saturated throughput and access delay are efficiently improved by ECoopMAC without introducing overhead and complexity.Furthermore

based on node’s behavior and state probability

we propose an analytical model to evaluate the performance of cooperative MAC protocols in multi-hop Ad Hoc networks.Finally

the performances of the proposed analytical model and protocol are evaluated by extensive simulations in multi-hop wireless Ad Hoc networks.Simulation results show that our proposed protocol significantly improves the saturated throughput compared with CoopMAC.In addition

the results of analysis and simulation match well

which confirm that the proposed analytical model is correct and effective.