In this paper, we show that the use of directional antennas in wireless ad hoc networks can actually increase interference due to limitations of virtual carrier sensing. We derive a simple mathematical expression for interference in both physical and virtual carrier sense networks, which reveals counter-intuitively that receivers in large dense networks with directional antennas can experience larger interference than in omnidirectional networks unless the beamwidth is sufficiently small. Validity of mathematical analysis is confirmed using simulations.
|Title of host publication
|2014 International Wireless Communications and Mobile Computing Conference (IWCMC)
|Institute of Electrical and Electronics Engineers (IEEE)
|Number of pages
|Published - Aug 2014