China
Africa
Explore chapters and articles related to this topic
Optical networks
Published in Matthew N. O. Sadiku, Optical and Wireless Communications, 2018
The next logical evolutionary step toward all-optical networks, already under investigation, is to employ a variation of MPLS that supports different wavelengths for different data flows on the transport layer. This technique is called generalized multiprotocol label switching (GMPLS), which is also known as multiprotocol lambda switching (MPλS).67 GMPLS is a suite of protocol extensions that provides common control to packet, TDM, wavelength, and fiber services. It extends the MPLS and LSP mechanisms to create generalized labels and generalized LSPs. By consolidating different traffic types, GMPLS permits simplification of networks and improves their scalability. It offers the means by which networks can be scaled and simplified by deployment of a new class of network element designed to handle multiple traffic types simultaneously. A key benefit of GMPLS is that it gives network operators the freedom to design their networks to best meet their specific objectives.
Multi-Objective Optimization in Optical Networks
Published in Yezid Donoso, Ramon Fabregat, Multi-Objective Optimization in Computer Networks Using Metaheuristics, 2016
MPλS architecture was designed for optical networks by the Internet Engineering Task Force (IETF) based on Multi-Protocol Label Switching (MPLS). MPS tries to correlate an MPLS label to a specific wavelength in such a way that the optical nodes do not need to process the MPLS label, but can make decisions based on the wavelengths. This allows switching without the need for converting the optical signal to an electric signal, because there is no need to read contents of the package. A generalized MPLS (GMPLS) is a set of technical specifications of how MPLS would work under different technologies in the network, for example, the optical networks.
Convergent Network Management and Control Plane
Published in Iannone Eugenio, Telecommunication Networks, 2017
CR-LDP is a new protocol that defines a set of procedures and messages by which one GLSR informs another of the label bindings it has made. This implicitly advertises the GLSP setup since it is performed by assigning label bindings across GLSRs. The idea below the introduction in the GMPLS protocol suite of this extended protocol is to incorporate traffic engineering capabilities into a well-known protocol widely used in MPLS networks. The traffic engineering requirements are met by extending LDP for support of constraint-based routed label switched paths (also sometimes called CR-GLSPs).
Traffic Grooming in PCE-based Architecture Combined with RWA Utilizing Dynamic Fiber State Information
Published in IETE Technical Review, 2018
Generalized Multi-Protocol Label Switching (GMPLS) brought in a common control plane standard for backbone networks. Provision of services in the network and traffic engineering (TE) [3] is done in GMPLS. WDM as a technology promises enormous bandwidth potential, and hence to utilize its network resources efficiently, an intelligent control plane was an imminent requirement. The use of Traffic Engineering Database (TED) in GMPLS gives much more information to the routing controller to select the best path for a request across a network. Further GMPLS provides for bidirectional label switched path (LSP) [4] in contrast to unidirectional LSP in Multi-Protocol Label Switching (MPLS) [5], which helps the control plane greatly. Another important facet of GMPLS is that the control and data planes are separated, which is an inherent requirement for transport networks.