ABSTRACT
It is evident from the discussions in the previous chapters that the use of directional antennas in the context of ad hoc wireless networks can largely reduce radio interference, thereby improving the utilization of wireless media. Several directional MAC protocols have been proposed to exploit this advantage and improve SDMA efficiency. However, even if we have an efficient directional MAC protocol, it alone would not be able to guarantee good system performance, because coupling between two interfering routes (which are apparently disjoint but physically located close enough to interfere with each other) may not allow the two routes to communicate simultaneously even if directional antennas are employed. Selection of routes avoiding mutual interference among selected routes is very important in this context.
