A novel medium access control (MAC) protocol for the single-channel multi-hop Ad Hoc network is proposed.Using omni-directional antenna,the control frame tagged with the routing information can be sensed by the neighboring nodes.Furthermore,the ACK message send by the upstream node triggers the CTS-only handshake of the downstream node and,the three-way exchange (CTS/DATA/ACK) is performed.This mechanism lowers the probability of the control message collision in heavy load network.Simulation results demonstrate that with various topologies our proposed scheme can outperform IEEE 802.11 with throughput and delay betterment.