We present a novel concurrent transmission MAC protocol for MANETs which enjoys the simple design of single-channel

single-transceiver and single-transmission power architecture.The proposed protocol inserts additional control gap between the transmission of control packets (RTS/CTS) and DATA packet

which allows a serious of RTS/CTS exchanges to take place before the possible multiple

concurrent data transmissions.To assure these concurrent data transmissions finishing correctly

the collision avoidance information is included in control packets.These information are used by neighboring nodes to determine whether begin their transmissions or not

as in traditional transmission power control schemes.Simulation results show that

compared with IEEE 802.11

significant throughput gain can be obtained by the proposed protocol.