MPLS-based PWE3 model
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Hi there! In the packet domain, MPLS helps to set up MPLS tunnels to carry PWs that transmit a variety of services on a PSN in an end-to-end manner. These services include TDM, ATM, and Ethernet services. The following figure shows the typical MPLS application in the packet domain. In the figure, the services between the NodeBs and RNCs are transmitted by PW1 and PW2 carried by the MPLS tunnel.
A tunnel provides a mechanism that transparently transmits information over a network. In a tunnel, one or more PWs can be carried. A tunnel connects a local PE and a remote PE for transparently transmitting data. PSN tunnels are available in several types, but the OptiX OSN equipment supports only MPLS tunnels. In this document, PWE3 is generally based on the MPLS tunnel (LSP), unless otherwise specified. Optical fibers or cables are used to carry tunnels, depending on the optical or electrical modules installed on the boards at both ends of the physical link. Multiple tunnels can be established on one fiber. The number of tunnels depends on the performance of the devices at both ends of the fiber. Just like in a DWDM system, one fiber can carry 40 wavelengths, 80 wavelengths, or 120 wavelengths, depending on the performance of the board and the technical level of the manufacturer. Thanks! |
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Hi there! In the packet domain, MPLS helps to set up MPLS tunnels to carry PWs that transmit a variety of services on a PSN in an end-to-end manner. These services include TDM, ATM, and Ethernet services. The following figure shows the typical MPLS application in the packet domain. In the figure, the services between the NodeBs and RNCs are transmitted by PW1 and PW2 carried by the MPLS tunnel.
A tunnel provides a mechanism that transparently transmits information over a network. In a tunnel, one or more PWs can be carried. A tunnel connects a local PE and a remote PE for transparently transmitting data. PSN tunnels are available in several types, but the OptiX OSN equipment supports only MPLS tunnels. In this document, PWE3 is generally based on the MPLS tunnel (LSP), unless otherwise specified. Optical fibers or cables are used to carry tunnels, depending on the optical or electrical modules installed on the boards at both ends of the physical link. Multiple tunnels can be established on one fiber. The number of tunnels depends on the performance of the devices at both ends of the fiber. Just like in a DWDM system, one fiber can carry 40 wavelengths, 80 wavelengths, or 120 wavelengths, depending on the performance of the board and the technical level of the manufacturer. Thanks! |
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