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Proceedings Paper

Autonomous mobile communication relays
Author(s): Hoa G. Nguyen; Hobart R. Everett; Narek Manouk; Ambrish Verma
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Paper Abstract

Maintaining a solid radio communication link between a mobile robot entering a building and an external base station is a well-recognized problem. Modern digital radios, while affording high bandwidth and Internet-protocol-based automatic routing capabilities, tend to operate on line-of-sight links. The communication link degrades quickly as a robot penetrates deeper into the interior of a building. This project investigates the use of mobile autonomous communication relay nodes to extend the effective range of a mobile robot exploring a complex interior environment. Each relay node is a small mobile slave robot equipped with sonar, ladar, and 802.11b radio repeater. For demonstration purposes, four Pioneer 2-DX robots are used as autonomous mobile relays, with SSC-San Diego's ROBART III acting as the lead robot. The relay robots follow the lead robot into a building and are automatically deployed at various locations to maintain a networked communication link back to the remote operator. With their on-board external sensors, they also act as rearguards to secure areas already explored by the lead robot. As the lead robot advances and RF shortcuts are detected, relay nodes that become unnecessary will be reclaimed and reused, all transparent to the operator. This project takes advantage of recent research results from several DARPA-funded tasks at various institutions in the areas of robotic simulation, ad hoc wireless networking, route planning, and navigation. This paper describes the progress of the first six months of the project.

Paper Details

Date Published: 17 July 2002
PDF: 8 pages
Proc. SPIE 4715, Unmanned Ground Vehicle Technology IV, (17 July 2002); doi: 10.1117/12.474472
Show Author Affiliations
Hoa G. Nguyen, Space and Naval Warfare Systems Ctr., San Diego (United States)
Hobart R. Everett, Space and Naval Warfare Systems Ctr., San Diego (United States)
Narek Manouk, Space and Naval Warfare Systems Ctr., San Diego (United States)
Ambrish Verma, Univ. of Southern California (United States)

Published in SPIE Proceedings Vol. 4715:
Unmanned Ground Vehicle Technology IV
Grant R. Gerhart; Chuck M. Shoemaker; Douglas W. Gage, Editor(s)

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