Title :
Connectivity of wireless ad hoc networks with random beamforming: An analytical approach
Author :
Durrani, Salman ; Zhou, Xiangyun ; Jones, Haley M.
Author_Institution :
Dept. of Eng., Australian Nat. Univ., Canberra, ACT
Abstract :
Random beamforming, where each node selects a main beam direction without any coordination with other nodes, has been proposed as a simple technique to improve connectivity in wireless ad hoc networks. This paper presents an analytical model for evaluating the impact of random beamforming on the connectivity of wireless ad hoc networks in the presence of path loss and shadowing effects. We investigate the connectivity with random beamforming from the view points of a single node and the entire network. The correctness of our analytical approach is validated by comparing the analytical results with simulations. We show that for a path loss exponent of alpha<3, irrespective of shadowing effects, random beamforming improves both the local and overall connectivity compared to omnidirectional antennas.
Keywords :
ad hoc networks; directive antennas; omnidirectional antennas; path loss; random beamforming; shadowing effects; wireless ad hoc networks; Access protocols; Analytical models; Array signal processing; Interference; Media Access Protocol; Mobile ad hoc networks; Probability density function; Shadow mapping; Signal to noise ratio; Spread spectrum communication;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2008. PIMRC 2008. IEEE 19th International Symposium on
Conference_Location :
Cannes
Print_ISBN :
978-1-4244-2643-0
Electronic_ISBN :
978-1-4244-2644-7
DOI :
10.1109/PIMRC.2008.4699730