Wireless mesh networks are evolving at a rapid rate. They overcome most geographical, temporal and organizational barriers to the transfer of data. Interference in wireless systems is one of the most significant factors that limit the network capacity and scalability of wireless mesh networks. Interference in IEEE 802.11 may be the result of the electronic devices or other Wi-Fi base stations that work in the same bandwidth. Interference in WiMAX/802.16 mesh is a major issues now-a-days of several phenomena, namely concurrent transmissions in the neighborhood and data collisions (that need to be avoided) at a receiver from transmitting nodes that are outside the range of each other (hidden terminal nodes).