JiaLiang Zhang
Abstract
Network Capacity, which is limited by interference between simultaneous transmissions of neighboring links, is a fundamental performance metric for wireless ad hoc networks. Ref. [1] showed that the capacity of wireless ad hoc networks with omnidirectional antennae does not scale well as the node density increases. Other related work ([2], [3], [4], etc.) demonstrated that the network capacity scales better with the use of directional antennae. Most previous investigations, however, were based on simplified but unrealizable models of antenna patterns. So far, there has not been a general framework for the analysis of network capacity when directional antennae of realizable generic patterns are used. Also, few papers have derived explicitly the impact of nulls and null-width in antenna pattern on network scalability. Specifically, the scale law of network capacity with general directional antennae has not yet been investigated. This paper addresses these issues. We study arbitrary and random networks (corresponding to the best case and random case respectively), where nodes with smart antennae are assumed to be located in a planar disk without mobility. We also point out how to generalize the result to that of generic directional antenna pattern. To conserve space here, we defer detailed analysis of the impact of null-width to the full paper.
- P. Gupta, P. R. Kumar, "The Capacity of Wireless Network".Google Scholar
- Spyropoulos, A., Raghavendra, C.S., "Capacity bounds for ad-hoc networks using directional antennas"Google Scholar
- R. Ramanathan. "On the performance of ad hoc networks using beamforming antennas"Google Scholar
- Su Yi, Yong Pei, Shivkumar Kalyanaraman, "On the capacity improvement of ad hoc wireless networks using directional antennas"Google Scholar
- Sathish Chandran, "Adaptive antenna arrays: Trends and applications" Google ScholarDigital Library
Index Terms
- Capacity improvement of wireless ad hoc networks with directional antennae
Recommendations
On the capacity improvement of ad hoc wireless networks using directional antennas
MobiHoc '03: Proceedings of the 4th ACM international symposium on Mobile ad hoc networking & computingThe capacity of ad hoc wireless networks is constrained by the interference between concurrent transmissions from neighboring nodes. Gupta and Kumar have shown that the capacity of an ad hoc network does not scale well with the increasing number of ...
Efficient Broadcasting in Ad Hoc Wireless Networks Using Directional Antennas
Using directional antennas to conserve bandwidth and energy consumption in ad hoc wireless networks (or simply ad hoc networks) is becoming popular in recent years. However, applications of directional antennas for broadcasting have been limited. We ...
How is the capacity of ad hoc networks improved with directional antennas?
The capacity of wireless ad hoc networks is constrained by the interference caused by the neighboring nodes. Gupta and Kumar have shown that the throughput for such networks is only Θ(W/√n) bits per second per node in a unit area domain when ...
Comments