Optical slotted circuit switched network: a bandwidth efficient alternative to wavelength-routed network

Yan Li; Martin Collier

doi:10.1117/12.742894

19 November 2007 Optical slotted circuit switched network: a bandwidth efficient alternative to wavelength-routed network

Yan Li, Martin Collier

Author Affiliations +

Proceedings Volume 6784, Network Architectures, Management, and Applications V; 67840E (2007) https://doi.org/10.1117/12.742894
Event: Asia-Pacific Optical Communications, 2007, Wuhan, China

Abstract

Wavelength-routed networks have received enormous attention due to the fact that they are relatively simple to implement and implicitly offer Quality of Service (QoS) guarantees. However, they suffer from a bandwidth inefficiency problem and require complex Routing and Wavelength Assignment (RWA). Most attempts to address the above issues exploit the joint use of WDM and TDM technologies. The resultant TDM-based wavelength-routed networks partition the wavelength bandwidth into fixed-length time slots organized as a fixed-length frame. Multiple connections can thus time-share a wavelength and the grooming of their traffic leads to better bandwidth utilization. The capability of switching in both wavelength and time domains in such networks also mitigates the RWA problem. However, TMD-based wavelength-routed networks work in synchronous mode and strict synchronization among all network nodes is required. Global synchronization for all-optical networks which operate at extremely high speed is technically challenging, and deploying an optical synchronizer for each wavelength involves considerable cost. An Optical Slotted Circuit Switching (OSCS) architecture is proposed in this paper. In an OSCS network, slotted circuits are created to better utilize the wavelength bandwidth than in classic wavelength-routed networks. The operation of the protocol is such as to avoid the need for global synchronization required by TDM-based wavelength-routed networks.

Citation Download Citation

Yan Li and Martin Collier "Optical slotted circuit switched network: a bandwidth efficient alternative to wavelength-routed network", Proc. SPIE 6784, Network Architectures, Management, and Applications V, 67840E (19 November 2007); https://doi.org/10.1117/12.742894

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