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Path-calculating and establishing methods and path-calculating element, nodes and network

A technology of path calculation unit and establishment method, which is applied in the field of communication and can solve the problem of low scalability

Inactive Publication Date: 2010-05-26
SUZHOU YUDESHUI ELECTRIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The PCE in the prior art calculates an LSP (Label Switched Path, Label Switched Path) passing through a source node and a sink node in the network, and then calculates another LSP that is different from the established LSP source node and has the same sink node , or calculate multiple LSPs with different source nodes and the same sink node at the same time. After the calculated LSPs are established, the nodes in the network need to maintain more LSP states and forwarding entries, and the scalability is not high.

Method used

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  • Path-calculating and establishing methods and path-calculating element, nodes and network
  • Path-calculating and establishing methods and path-calculating element, nodes and network
  • Path-calculating and establishing methods and path-calculating element, nodes and network

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Experimental program
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Embodiment 1

[0045] This embodiment combines figure 2 The route establishment method will be described.

[0046]Step 201: Initiate a path calculation request to the PCE, the path calculation request indicates that the MP2P attribute LSP needs to be calculated, and indicates the source node and the sink node that need to calculate the MP2P attribute LSP; the PCE stores the combined MERGE capability information of the nodes in the network , the MERGE capability information of the nodes in the network indicates whether the nodes in the network are MERGE nodes; at least one node between the source node and the sink node is a MERGE node;

[0047] In this step, the source node initiates a path calculation request to the PCE, and the path calculation request indicates that the MP2P attribute LSP needs to be calculated, and indicates the source node and the sink node of the MP2P attribute LSP that needs to be calculated;

[0048] When the path calculation request indicates that an MP2P attribute...

Embodiment 2

[0063] This embodiment combines the attached image 3 The path calculation method will be described.

[0064] 301. Acquire and store MERGE capability information of nodes in the network, where the MERGE capability information of nodes in the network indicates whether the node is a MERGE node;

[0065] 302. Receive a path calculation request, the path calculation request indicates that the MP2P attribute LSP needs to be calculated, and indicates the source node and the sink node that need to calculate the MP2P attribute LSP; at least one node between the source node and the sink node is MERGE node;

[0066] In this step, the PCE receives the path calculation request sent by the source node, and the path calculation request indicates that the MP2P attribute LSP needs to be calculated, and indicates the source node and the sink node of the MP2P attribute LSP that needs to be calculated; the source node and the sink node At least one node between them is a MERGE node;

[0067] ...

Embodiment 3

[0078] Figure 4 It is a flow chart of the path calculation method in the embodiment of the present invention, combined below Figure 5 The network structure diagram is described, and the path calculation method includes:

[0079] 401. The PCE acquires and saves MERGE capability information of nodes in the network, where the MERGE capability information of nodes in the network indicates that node D and node F are MERGE nodes;

[0080] In this step, the MERGE capability information of nodes in the network indicates that nodes D and F are MERGE nodes, and nodes A, B, C, E, and G are not MERGE nodes.

[0081] 402. The PCE receives the path calculation request initiated by node A, which indicates that the MP2P attribute LSP needs to be calculated; indicates that the source nodes of the MP2P attribute LSP to be calculated are A and B, and the destination node is G; and indicates the MERGE in the network Node is D;

[0082] 403. The PCE calculates the MP2P attribute LSP according...

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Abstract

The invention provides path-calculating and establishing methods and path-calculating element, nodes and network. The path-establishing method comprises the following steps of: initiating a path-calculating request to a path-calculating element (PCE), wherein the path-calculating request indicates a multiple points to a point (MP2P) attribute label switched path (LSP) to be calculated and indicates a source node and a host node needing to calculate the MP2P attribute LSP; receiving the MP2P attribute LSP calculated by the PCE according to the path-calculating request and the MERGE capability information of the nodes in the network; and establishing the MP2P attribute LSP between the source node and the host node by an MP2P signaling. The embodiment of the invention provides a path-calculating method corresponding to the path-establishing method, a path-calculating element, nodes and a network. The embodiment of the invention can lessen the LSP state and transferring list items to be maintained in the network so as to improve the expandability of the network.

Description

technical field [0001] The present invention relates to the communication field, in particular to a path calculation method, a path establishment method, a path calculation unit, a node and a network. Background technique [0002] A PCE (Path Computation Element, Path Computation Element) is a unit for path computation in a network, and is used to solve optimal or nearly optimal TE (Traffic Engineering, Traffic Engineering) path computation in a large-scale network. When PCE is used to calculate the path, PCC (Path Computation Client, Path Computation Client) initiates a path calculation request to PCE through PCEP (Path Computation Element Communication Protocol, PCE communication protocol), and the request carries the source node and destination node that PCC requests to calculate the path , the request also carries the attributes of the requested calculation path, such as bandwidth; at the same time, it may carry the constraints of the path calculation request, such as th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L29/06H04L45/50
Inventor 易其亮
Owner SUZHOU YUDESHUI ELECTRIC TECH CO LTD