Efficient usage of available capacity is critical for ad hoc network with limited bandwidth. Capacity iswasted due to exposed terminals in high-density ad hoc network. This paper proposes a new scheme, Packet SensingMedia Access with Collision Avoidance (PSMA/CA) to solve the exposed terminals problem in static ad hocnetwork, thereby to improve the spatial reuse of the medium and increase the network throughput. Neighbors’information within 2 hops plays an important role in PSMA/CA, and the protocol act like 802.11DCF in the absence of neighbors’ information. Nodes in the network get neighbors’ information within 1-hop and 2-hops via channellistening and neighbors information exchanging respectively. Having the 2-hops neighbors’ information, an exposedterminal captures a frame of ongoing dialogue and calculates the correlation coefficient between the primarydialogue and new dialogue to be built before trying to transmit. If the correlation coefficient is lower than the threshold required by SINR (signal to interference and noise ratio) for a certain bandwidth, the exposed terminal cancommunicate with its destination in parallel with the primary dialogue. PSMA/CA solves the exposed terminalsproblem without nodes synchronization and without additional requirements for hardware complexity. Simulationresults show that the average throughput of PSMA/CA outperforms 802.11DCF by 20% in high-density ad hocnetwork.