Survivability in waveband switching optical networks: Challenges and new ideas

Authors:
Xingwei Wang;Lei Guo;Xuetao Wei;Weigang Hou;Fei Yang;Lan Pang
Affiliations:
College of Information Science and Engineering, Northeastern University, Shenyang 110004, China;College of Information Science and Engineering, Northeastern University, Shenyang 110004, China and Key Lab of Broadband Optical Fiber Transmission and Communication Networks, University of Electr ...;Department of Computer Science and Engineering, University of California, Riverside, CA 92521, USA;College of Information Science and Engineering, Northeastern University, Shenyang 110004, China;College of Information Science and Engineering, Northeastern University, Shenyang 110004, China;College of Information Science and Engineering, Northeastern University, Shenyang 110004, China
Venue:
Computer Communications
Year:
2008

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Abstract

With the developmental trend of ultra-high speed and ultra-large capacity required in optical networks, the number of wavelengths in each fiber greatly keeps increasing and the consequence is that the size (i.e., number of switching ports) and cost of conventional Optical Cross-Connects (OXCs) are excessively enhanced. Therefore, the technique called Waveband Switching (WBS) has been proposed to reduce the number of switching ports for saving the costs. At the same time, the survivability for optical networks is a very important issue since each wavelength channel has the transmission rate over several gigabits per second and the failures may lead to a lot of traffic blocked. Combining the WBS technique and survivability in optical networks, in this paper we comprehensively review the existing survivable schemes in WBS optical networks which are quite different from conventional survivable schemes in Wavelength-Routed (WR) optical networks. Then, we analyze the shortages of the current researches and prospect the challenges for survivability in WBS optical networks. Finally, we propose new ideas for designing survivable schemes to well guide the future work of researchers in WBS optical networks.