Hidden Terminal Detection in 802 . 11-based Wireless Ad Hoc Networks a

The hidden terminal problem is a well-known phenomenon in wireless networks. Mechanisms to eliminate the effect of hidden terminals have been proposed and standardized. These mechanisms are usually used, however, without being aware of the existence of any hidden terminals. Hidden terminal detection, on the other hand, provides such awareness, which is useful when deciding whether or when these standardized mechanisms should be used. This paper proposes two detection mechanisms: active detection and passive detection. Simulations based on IEEE 802.11-based ad hoc networks are carried out to evaluate the proposed schemes.