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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: 2005-05-18
SHANGHAI JIAOTONG 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 with reference to the accompanying drawings and embodiments.

[0018] In this embodiment, OXC1 and OXC2 are two optical cross-connect nodes directly connected by 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, as figure 1 shown.

[0019] Using the method for transmitting link state information across the network proposed by the present invention, a software module for performing IP-in-IP encapsulation / decapsulation is added to the nodes of the optical network control plane (the control part of OXC1 and the control part of OXC2). After that, the process of communicating the link state information from the control plane node 1 (OXC1 control part) to the control plane node 2 (OXC2 control part) through the network is as follow...

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Abstract

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. The present invention carries out IP-in-IP encapsulation to the OSPF (Open Shortest Path Protocol) routing packet used to describe the optical network transmission plane link state information by adding an independent encapsulation / decapsulation module in the node of the optical network control plane, This enables the transmitted link state information to traverse multi-hop IP networks. The method proposed by the present invention has high encapsulation efficiency, good versatility, and simple implementation, solves the problem that the nodes of the control plane cannot pass through the network to transmit the link state information of the transmission plane, and eliminates the topology limitation of the optical network control plane in the IP network , which greatly enhances the flexibility of optical network control plane design.

Description

technical field [0001] The invention relates to a method for transmitting link state information through a network, which is used to transmit a routing packet of optical network transmission plane link state information 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] The automatic switching optical network can be divided into three parts in function: the management plane, the control plane and the 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 according to the obtained information. The nodes of the control plane corresponding to the nodes directly connected to the optical fiber in the transport plane of...

Claims

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Application Information

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