NDLI: Reliable communications in aerial sensor networks by using a hybrid antenna

Content Provider	IEEE Xplore Digital Library
Author	Kai Li Ahmed, N. Kanhere, S.S. Jha, S.
Copyright Year	2012
Description	Author affiliation: School of Computer Science and Engineering, The University of New South Wales, Sydney 2052, Australia (Kai Li; Ahmed, N.; Kanhere, S.S.; Jha, S.)
Abstract	An AWSN composed of bird-sized Unmanned Aerial Vehicles (UAVs) equipped with sensors and wireless radio, enables low cost high granularity three-dimensional sensing of the physical world. The sensed data is relayed in real-time over a multi-hop wireless communication network to ground stations. The following characteristics of an AWSN make effective multi-hop communication challenging - (i) frequent link disconnections due to the inherent dynamism (ii) significant inter-node interference (iii) three dimensional motion of the UAVs. In this paper, we investigate the use of a hybrid antenna to accomplish efficient neighbor discovery and reliable communication in AWSNs. We propose the design of a hybrid Omni Bidirectional ESPAR (O-BESPAR) antenna, which combines the complimentary features of an isotropic omni radio (360 degree coverage) and directional ESPAR antennas (beamforming and reduced interference). Control and data messages are transmitted separately over the omni and directional modules of the antenna, respectively. Moreover, a communication protocol is presented to perform fast neighbor discovery and beam steering. We present results from extensive simulations then consider three different real-world AWSN application scenarios and empirical aerial link characterization and show that the proposed antenna design and protocol reduces the packet loss rate, as compared to a single omni or ESPAR antenna.
Starting Page	156
Ending Page	159
File Size	402292
Page Count	4
File Format	PDF
ISBN	9781467315654
ISSN	07421303
e-ISBN	9781467315647
DOI	10.1109/LCN.2012.6423595
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-10-22
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Directive antennas Protocols Transmitting antennas Directional antennas Wireless sensor networks Packet loss Performance Directional Antenna UAV Aerial Sensor Networks
Content Type	Text
Resource Type	Article

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