A Dynamic Virtual Carrier Sensing and Interference Aware Routing Protocol in Wireless Mesh Networks

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Executive Summary

The performance of wireless mesh networks is severely limited by the interfering nature of wireless transmissions. In an 802.11 network, collisions can be aggravated by the hidden terminal problem. In order to solve the hidden terminal problem, virtual carrier sensing using RTS/CTS has been proposed as a solution. However, this mechanism potentially aggravates the exposed terminal problem which can neutralize or even reverse the gains in using it. Another problem is that most dynamic routing protocol select paths based on only one criteria (shortest hops, delay, etc), which do not take into account of interference or traffic pattern.

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