An Interdomain Path Computation Server for GMPLS Networks

Hiroshi MATSUURA  Tatsuro MURAKAMI  Kazumasa TAKAMI  

IEICE TRANSACTIONS on Communications   Vol.E88-B   No.8   pp.3329-3342
Publication Date: 2005/08/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.8.3329
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Switching for Communications
GMPLS,  interdomain,  routing,  path computation server,  OSPF,  RSVP-TE,  explicit route object,  aggregation,  

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The demand for intra- and interdomain routing for multilayered networks such as those using generalized multiprotocol label switching (GMPLS) is strong. One of the features that is peculiar to GMPLS networks is that because several different domains, such as those of IP, ATM, and optical fiber, are combined with each other hierarchically, various routing policies, which are sometimes independent from underlying domains and sometimes taking the underlying domains' policies into consideration, are required. For example GMPLS's lower layer LSPs like lambda LSP are expected to be established independently before the upper-layer LSPs, like IP and MPLS LSPs, are established in the underlying domains. Another requirement for the GMPLS interdomain routing is lightening the burden for selecting the interdomain route, because there are a lot of demands to interconnect many GMPLS domains. In order to satisfy these demands, we propose a path computation server (PCS) that is special for the intra/interdomain routing of GMPLS networks. As a counterpart of the proposed interdomain routing, it is now becoming popular to apply OSPF to the GMPLS interdomain routing. Therefore, we compared the proposed interdomain routing with OSPF, and show the applicability of the routing to GMPLS networks.