Special Section on Free-Space Laser Communication

Joint relay selection and link scheduling in cooperative free-space optical system

[+] Author Affiliations
Yuchen Tan, Yejun Liu, Lei Guo, Pengchao Han

Northeastern University, School of Computer Science and Engineering, P.O. Box 365, Shenyang 110819, China

Opt. Eng. 55(11), 111604 (Aug 03, 2016). doi:10.1117/1.OE.55.11.111604
History: Received April 11, 2016; Accepted July 13, 2016
Text Size: A A A

Abstract.  Free-space optical (FSO) communication system is vulnerable to link disruption due to the propagation loss and atmospheric turbulence. Cooperative FSO system has been proposed to mitigate the adverse effects of link disruption by the cooperative transmission in assistance of relay. However, most of the related works focus on the outage probability analysis and put less attention on the resource utilization. In fact, there exists a waste of bandwidth resource due to time slot waiting and more FSO transceivers are occupied. We mainly focus on the relay selection and link scheduling mechanisms of cooperative FSO system to improve not only network reliability but also resource utilization. We first propose a relay selection algorithm as a solution to combat channel fading. In the relay selection algorithm, two cooperative modes including intrarelay-set and inter-relay-set cooperative modes are proposed to enhance network capacity. Then, a link scheduling algorithm is further proposed to improve the bandwidth utilization and reduce the occupancy rate of transceivers by utilizing more sufficiently the idle FSO links. Simulation results show that the proposed algorithms can provide significant performance gain for cooperative FSO system in reliability and resource utilization and are highly suitable for the growing traffic demands.

Figures in this Article
© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Yuchen Tan ; Yejun Liu ; Lei Guo and Pengchao Han
"Joint relay selection and link scheduling in cooperative free-space optical system", Opt. Eng. 55(11), 111604 (Aug 03, 2016). ; http://dx.doi.org/10.1117/1.OE.55.11.111604


Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.