Directional medium access control for ad hoc networks

Directional medium access control for ad hoc networks

Using directional antennas in ad hoc networks may introduce the well-known deafness problem, exacerbate the hidden terminal problem and the exposed terminal problem, add difficulty on mobile communication, and distort the operation of existing routing and TCP protocols. Although a lot of studies have been undertaken on the directional MAC protocols, most of them focus only on one or several asp...

Medium Access Control in Ad Hoc Networks with Omni-directional and Directional Antennas

A Directional Antenna Medium Access Control Protocol for Wireless Ad Hoc Networks

In this paper we propose a Directional Antenna Medium Access (DAMA) protocol that takes advantage of the benefits offered by directional antennas and is best suited for sparsely distributed networks. A large portion of DAMA has been inspired by the IEEE 802.11 MAC, with major enhancements including a new neighbor discovery scheme, and an optimized circular directional transmission of RTS and CT...

Directional Antenna-based Medium Access Control and Routing for AD HOC Networks: Challenges and Solutions

An area of growing interest has been to apply directional antennas to MANET protocols, which typically assumed a uniform equipment of omnidirectional antennas. In contrast to omnidirectional antennas, directional antennas have the benefits of reduced collision and extension of communication distance in a narrower range of directions. Existing work that applies directional antennas to MANET most...

Multichannel medium access control for ad hoc wireless networks

In this paper, we study the multichannel exposed terminal problem in multihop wireless networks. We propose a multichannel medium access control (MAC) protocol, called multichannel MAC protocol with hopping reservation (MMAC-HR), to resolve the multichannel exposed terminal problem. MMAC-HR uses two radio interfaces; one interface is fixed over the control channel, and the other interface switc...