NDLI: Asymptotic Connectivity in Wireless Ad Hoc Networks Using Directional Antennas

Content Provider	IEEE Xplore Digital Library
Author	Pan Li Chi Zhang Yuguang Fang
Copyright Year	1993
Abstract	Connectivity is a crucial issue in wireless ad hoc networks (WANETs). Gupta and Kumar have shown that in WANETs using omnidirectional antennas, the critical transmission range to achieve asymptotic connectivity is O(radic(log n/n)) if n nodes are uniformly and independently distributed in a disk of unit area. In this paper, we investigate the connectivity problem when directional antennas are used. We first assume that each node in the network randomly beam forms in one beam direction. We find that there also exists a critical transmission range for a WANET to achieve asymptotic connectivity, which corresponds to a critical transmission power (CTP). Since CTP is dependent on the directional antenna pattern, the number of beams, and the propagation environment, we then formulate a non-linear programming problem to minimize the CTP. We show that when directional antennas use the optimal antenna pattern, the CTP in a WANET using directional antennas at both transmitter and receiver is smaller than that when either transmitter or receiver uses directional antenna and is further smaller than that when only omnidirectional antennas are used. Moreover, we revisit the connectivity problem assuming that two neighboring nodes using directional antennas can be guaranteed to beam form to each other to carry out the transmission. A smaller critical transmission range than that in the previous case is found, which implies smaller CTP.
Sponsorship	IEEE Computer Society IEEE Communications Society Association for Computing Machinery (ACM)
Starting Page	1106
Ending Page	1117
Page Count	12
File Size	894576
File Format	PDF
ISSN	10636692
Volume Number	17
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Mobile ad hoc networks Directional antennas Transmitting antennas Directive antennas Wireless sensor networks Brain modeling Receiving antennas Transmitters Ad hoc networks Wireless mesh networks critical transmission power Wireless ad hoc networks directional antenna asymptotic connectivity critical transmission range
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Electrical and Electronic Engineering Computer Science Applications Software

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