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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editors: K. Bergman and O. Gerstel
  • Vol. 6, Iss. 1 — Jan. 1, 2014
  • pp: 86–95

Link Allocation, Routing, and Scheduling for Hybrid FSO/RF Wireless Mesh Networks

Yi Tang and Maïté Brandt-Pearce  »View Author Affiliations


Journal of Optical Communications and Networking, Vol. 6, Issue 1, pp. 86-95 (2014)
http://dx.doi.org/10.1364/JOCN.6.000086


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Abstract

A hybrid free space optics/radio frequency (FSO/RF) technology has recently been proposed as a means of significantly increasing the throughput and reliability of wireless mesh networks (WMNs) for broadband communication. Current network control approaches assume quasi-static communication channels and use the simple protocol model to handle RF network interference. Depending on the application, these assumptions may not be sufficient for optimizing hybrid FSO/RF networks. In this paper, we present network control algorithms based on both nonfading and fading communication channels using the physical interference model for the RF portion of the network. We study the throughput improvement achievable by augmenting the RF WMN with FSO links. We address two questions: given a fixed number of FSO links, where should they be installed to maximize the throughput for given traffic demands, and how should the traffic be routed and scheduled in the hybrid FSO/RF network to achieve this throughput? We formulate these problems as one mixed integer linear program and provide a computationally efficient heuristic for scheduling and routing traffic demands through the hybrid FSO/RF network. The results show that the throughput of the original RF network can be increased dramatically by properly adding FSO links.

© 2013 Optical Society of America

OCIS Codes
(060.4510) Fiber optics and optical communications : Optical communications
(060.2605) Fiber optics and optical communications : Free-space optical communication
(060.4251) Fiber optics and optical communications : Networks, assignment and routing algorithms
(060.4256) Fiber optics and optical communications : Networks, network optimization

ToC Category:
Research Papers

History
Original Manuscript: May 14, 2013
Revised Manuscript: October 15, 2013
Manuscript Accepted: November 22, 2013
Published: December 23, 2013

Citation
Yi Tang and Maïté Brandt-Pearce, "Link Allocation, Routing, and Scheduling for Hybrid FSO/RF Wireless Mesh Networks," J. Opt. Commun. Netw. 6, 86-95 (2014)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jocn-6-1-86

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