DBTMA(dual busy tone multiple access)protocol is designed to solve both hidden and exposed terminal problems

but hidden terminals outside the transmission range of the receiver are out of control in the protocol. An enhanced protocol named EDBTMA is proposed

which can eliminate hidden terminals in large-scale ad hoc network. There are two key enhancements in EDBTMA different from DBTMA. Firstly

the dual transceiver is adopted in EDBTMA and the 802.11a/g device is used for high-speed data channel. Secondly

the adaptive busy-tone power control scheme is used in EDBTMA. The receiver adjusts the transmission power of busy-tone according to received signal strength of the sender. All hidden terminals are covered by the busy-tone and no collisions occur during the reception of data packet. Simulation results show that EDBTMA solves the hidden terminals problem better than DBTMA and achieves 48% additional network throughput.