GMPLS Based Survivable Photonic Network Architecture

Abstract

The objective of this paper is to survey the Generalized Multi-Protocol Label Switching (GMPLS) based recovery technology for optical transport networks. This paper introduces standardization activities of the GMPLS based recovery technology in the Internet Engineering Task Force (IETF), and recent progress of related experiments. In addition, this paper extracts requirements for the GMPLS based recovery technology through the evaluation of existing network elements, which can be client nodes of the optical transport networks. The results of field evaluations on the GMPLS based recovery technology are also introduced in this paper. Then, this paper addresses the issues for future deployment of the GMPLS based recovery technology for the optical transport networks.

Service and Operation of GMPLS-Controlled Photonic Internet Exchanges

“…Recovery from a failure of the optical switches at the transit nodes can be achieved by employing an IETF RFC4872 [5] based end-to-end recovery scheme. The feasibility of the GMPLS-based protection and restoration was confirmed in a number of studies conducted by NTT such as [2], [4],and [6], which include a field trial over commercial WDM links. b) Recovery from User-to-Network interface (UNI) section…”

“…On the other hand, the tpOXC can achieve recovery functionality by adding the GMPLS control plane. The performance of GMPLS based restoration is in the order of hundreds of milliseconds [4], which is not a satisfactory level of performance but we expect it can be improved to meet the requirements.…”

G-lambda and EnLIGHTened: Wrapped In Middleware Co-allocating Compute and Network Resources Across Japan and the US

“…In the GL/EL collaboration, a network resource manager [17] developed by NTT is responsible for management of the JGN II south domain's network, over which GMPLS control plane has been superposed [18]. This NRM consists of Web Service (WS)-adapter, scheduler, path data base, and path control manager modules as shown in Figure 6.…”

Impairment compensation control for wavelength switched optical networks (WSON)

“…Although wavelength paths provisioned by ROADMs and WXCs are currently configured and monitored by vendor-specific management systems, introduction of distributed control protocols for "route and wavelength assignment (RWA)" computation and wavelength path establishment will enhance automation of path provisioning. It will also improve resiliency by re-routing upon a link or node's failure [2]. WSON (Wavelength Switched Optical Network) initiative in the IETF (Internet Engineering Task Force) is standardizing the control protocols of wavelength paths based upon GMPLS (Generalized Multi-Protocol Label Switching), and its initial set of documents are now fairly stable.…”