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Issue No. 10 - October (2011 vol. 10)
ISSN: 1536-1233
pp: 1374-1387
Pan Li , Mississippi State University, Mississippi State
Chi Zhang , University of Florida, Gainesville
Yuguang Fang , University of Florida, Gainesville and Xidian University, Xian
Considering a disk of unit area with n nodes, we investigate the capacity of wireless networks using directional antennas. First, we study the throughput capacity of random directional networks with multihop relay schemes, and find that the capacity gain compared to random omnidirectional networks is O(\log n), which is tighter than previous results. We also show that using directional antennas can significantly reduce power consumption in the networks. Second, for the first time, we explore the throughput capacity of random directional networks with one-hop relay schemes. Interestingly and against our intuition, we find that one-hop instead of multihop delivery schemes can make random directional networks scale. Third, we investigate the trade-offs between transmission range and throughput in random directional networks and show that using larger transmission range can result in higher throughput. Finally, we present a lower bound on the transport capacity of arbitrary directional networks, and find that without side lobe directional antenna gain, arbitrary directional networks can also scale.
Wireless ad hoc networks, throughput capacity, transport capacity, directional antenna, power consumption.

C. Zhang, P. Li and Y. Fang, "The Capacity of Wireless Ad Hoc Networks Using Directional Antennas," in IEEE Transactions on Mobile Computing, vol. 10, no. , pp. 1374-1387, 2010.
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