Distributed IP Refactoring: Cooperation with Optical Transport Layer and Centralized SDN

Hiroki MORI
Yoshihiko UEMATSU

IEICE TRANSACTIONS on Communications   Vol.E101-B    No.7    pp.1661-1674
Publication Date: 2018/07/01
Publicized: 2018/01/10
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2017EBP3240
Type of Manuscript: PAPER
Category: Network System
BGP,  IP optical cooperation,  IP refactoring,  network reconfiguration,  OSPF,  software defined network,  state migration,  

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By focusing on the recent swing to the centralized approach by the software defined network (SDN), this paper presents a novel network architecture for refactoring the current distributed Internet protocol (IP) by not only utilizing the SDN itself but also implementing its cooperation with the optical transport layer. The first IP refactoring is for flexible network topology reconfiguration: the global routing and explicit routing functions are transferred from the distributed routers to the centralized SDN. The second IP refactoring is for cost-efficient maintenance migration: we introduce a resource portable IP router that can behave as a shared backup router by cooperating with the optical transport path switching. Extensive evaluations show that our architecture makes the current IP network easier to configure and more scalable. We also validate the feasibility of our proposal.