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Method for delivering link state information to pass through network

A link state information and network technology, applied in the field of optical communication, can solve the problem of multi-hop IP network transmission of link state information of the optical network transmission plane, OSPF routing packets cannot pass through multi-hop IP networks, OSPF routing packets cannot be forwarded, etc. problems, to achieve the requirements of universality and simplicity, high packaging efficiency, and the elimination of topology restrictions

Inactive Publication Date: 2003-07-23
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0004] At present, the optical network control plane nodes cannot transmit the link state information of the optical network transmission plane through the multi-hop IP network, the reason is the limitation of the OSPF protocol itself
The OSPF protocol stipulates that OSPF routing packets cannot be forwarded by routers in the IP network, which prevents OSPF routing packets from passing through multi-hop IP networks
In the draft proposed by the IETF, although the revision of the OSPF protocol is proposed, there is no solution to this problem.

Method used

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  • Method for delivering link state information to pass through network
  • Method for delivering link state information to pass through network
  • Method for delivering link state information to pass through network

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Embodiment Construction

[0017] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] In this embodiment, OXC1 and OXC2 are two optical cross-connect nodes directly connected through optical fibers on the optical network transmission; their corresponding nodes in the control plane are the control part of OXC1 and the control part of OXC2, which are connected by the multi-hop IP network separated, such as figure 1 shown.

[0019] Utilize the method that the link state information proposed by the present invention traverses the network to convey, in the node (the control part of OXC1 and the control part of OXC2) of optical network control plane, respectively increase a software module that performs IP-in-IP encapsulation / decapsulation Afterwards, the process of link state information passing through the network from control plane node 1 (OXC1 control part) to control plane node 2 (OXC2 control part) is a...

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Abstract

With independent capsulation / module being added in the node of the plane controlled by the optical network, the route packet of the OSPF (open shortest route protocol), which describes the link stateinformation in the optical network transmission plane, is carried out the IP-in-IP capsulation, making the link state information transmitted possible to pass through the IP network with multiple hops. The method features high capsulation efficiency, the good versatility and the simple implementation. The invention eliminates the topology restriction of the optical network control plane in IP networks so as to enhance the flexibility of designing the optical network control plane.

Description

Technical field: [0001] The invention relates to a method for transmitting link state information through a network, which is used for transmitting a routing packet of link state information of an optical network transmission plane through a multi-hop IP network in an automatic switching optical network control plane, and belongs to the technical field of optical communication. technical background: [0002] Automatic switching optical network can be divided into three parts in function: management plane, control plane and transmission plane. The automatic switching optical network uses the intelligence of the control plane to realize automatic switching, but the nodes of the control plane must be able to obtain the link state information of the transmission plane to make a decision to establish an optical path based on the obtained information. Nodes in the control plane corresponding to nodes directly connected through optical fibers in the optical network transmission pla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L29/06H04Q3/52
Inventor 陆暘金耀辉张春蕾胡卫生姜淳
Owner SHANGHAI JIAO TONG UNIV
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