This paper presents a performance study of the deafness effect caused by the use of
directional antenna in 802.11 networks. We show that different assumptions on antenna and …

Directional antennas have been introduced to improve the performance of 802.11 based
wireless networks. Station equipped with directional antennas can beamform data in a …

This paper addresses the issue of deafness in directional antennas for wireless ad hoc
networks. Deafness is caused when a node X repeatedly attempts to communicate with …

When directional antennas are used in 802.11 based wireless LANs, higher network
capacity is often accompanied with more collisions. This is due to the enhanced hidden …

Nodes, using CSMA/CA type medium access control (MAC) protocols (eg IEEE 802.11 e)
and omnidirectional antennas, in an ad-hoc network may not be able to transmit packets to …

Directional antennas have been introduced to improve the performance of 802.11 based
wireless networks. Station equipped with directional antennas can beamform data in a …

Inexpensive analog phase array antennas are on the verge of becoming widely available.
These versatile antennas are capable of very rapidly altering their gain pattern to form …

We present an outdoors 802.11 a testbed based on off-the-shelf components that we used
for multi-radio node experimentation. This is the first such testbed, to our knowledge …

With the increasing popularity of 802.11 wireless technology, such equipment has recently
been used to set up long distance links for wireless mesh networks. To be able to increase …

Using directional antennas can be beneficial for wireless ad hoc networks consisting of a
collection of wireless hosts. The most important benefit includes a reduction of the radio …