Throughput enhancement in ad hoc networks using virtual carrier sensing mechanism

In wireless ad hoc network, hidden and exposed node problem can cause the throughput performance degradations. Hidden Node (HN) allows to transmit but interferes with the receiver causes collision and Exposed Node (EN) does not allows to transmit although they would not interfere. In this paper, an Enhanced QoS model is designed to combat hidden and exposed node problem in an ad hoc network by applying Hidden Free Design (HFD) and Exposed Free Design (EFD) algorithm. These two algorithms are implemented using a single virtual carrier sensing (VCS) mechanism with the Network Allocation Vector (NAV). This model, also concentrates to mitigate NAV mismanipulation in sender and receiver nodes. With the simulation results, this model provides significant improvement in throughput with reduced power utilization using single carrier sensing mechanism.