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Holding-time-aware asymmetric spectrum allocation in virtual optical networks
Author(s): Chunjian Lyu; Hui Li; Yuze Liu; Yuefeng Ji
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Paper Abstract

Virtual optical networks (VONs) have been considered as a promising solution to support current high-capacity dynamic traffic and achieve rapid applications deployment. Since most of the network services (e.g., high-definition video service, cloud computing, distributed storage) in VONs are provisioned by dedicated data centers, needing different amount of bandwidth resources in both directions, the network traffic is mostly asymmetric. The common strategy, symmetric provisioning of traffic in optical networks, leads to a waste of spectrum resources in such traffic patterns. In this paper, we design a holding-time-aware asymmetric spectrum allocation module based on SDON architecture and an asymmetric spectrum allocation algorithm based on the module is proposed. For the purpose of reducing spectrum resources’ waste, the algorithm attempts to reallocate the idle unidirectional spectrum slots in VONs, which are generated due to the asymmetry of services’ bidirectional bandwidth. This part of resources can be exploited by other requests, such as short-time non-VON requests. We also introduce a two-dimensional asymmetric resource model for maintaining idle spectrum resources information of VON in spectrum and time domains. Moreover, a simulation is designed to evaluate the performance of the proposed algorithm, and results show that our proposed asymmetric spectrum allocation algorithm can improve the resource waste and reduce blocking probability.

Paper Details

Date Published: 25 October 2017
PDF: 8 pages
Proc. SPIE 10464, AOPC 2017: Optical Information and Network (Optical Fiber Sensors), 104641V (25 October 2017); doi: 10.1117/12.2285545
Show Author Affiliations
Chunjian Lyu, Beijing Univ. of Posts and Telecommunications (China)
Hui Li, Beijing University of Posts and Telecommunications (China)
Yuze Liu, Beijing Univ. of Posts and Telecommunications (China)
Yuefeng Ji, Beijing Univ. of Posts and Telecommunications (China)


Published in SPIE Proceedings Vol. 10464:
AOPC 2017: Optical Information and Network (Optical Fiber Sensors)
Zi-Sen Zhao; Leping Wei; Yanbiao Liao; Weixu Zhang; Desheng Jiang; Wei Wang; Kenneth T. V. Grattan, Editor(s)

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