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Flow Scheduling in OBS Networks Based on Software-Defined Networking Control Plane

  • Tang, Wan (College of Computer Science, South-Central University for Nationalities) ;
  • Chen, Fan (College of Computer Science, South-Central University for Nationalities) ;
  • Chen, Min (School of Comupter Science and Technology, Huazhong University of Science and Technology) ;
  • Liu, Guo (College of Computer Science, South-Central University for Nationalities)
  • Received : 2015.10.12
  • Accepted : 2015.11.13
  • Published : 2016.01.31

Abstract

The separated management and operation of commercial IP/optical multilayer networks makes network operators look for a unified control plane (UCP) to reduce their capital and operational expenditure. Software-defined networking (SDN) provides a central control plane with a programmable mechanism, regarded as a promising UCP for future optical networks. The general control and scheduling mechanism in SDN-based optical burst switching (OBS) networks is insufficient so the controller has to process a large number of messages per second, resulting in low network resource utilization. In view of this, this paper presents the burst-flow scheduling mechanism (BFSM) with a proposed scheduling algorithm considering channel usage. The simulation results show that, compared with the general control and scheduling mechanism, BFSM provides higher resource utilization and controller performance for the SDN-based OBS network in terms of burst loss rate, the number of messages to which the controller responds, and the average latency of the controller to process a message.

Keywords

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