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Multi-layer LSP control method and device

A control method and low-level technology, applied in the field of mobile communication, can solve problems such as the inability to effectively implement multi-layer LSP and its TE link association, and achieve the effect of reducing message interaction and optimizing control efficiency

Active Publication Date: 2018-07-03
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The present invention provides a multi-layer LSP control method and device to solve the technical problem in the prior art that the association between multi-layer LSPs and their TE links cannot be effectively realized

Method used

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  • Multi-layer LSP control method and device

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0082] The PCC requests the PCE to perform path calculation, creates a layer association group, and adds related LSPs to the layer association group. Such as Figure 7 As shown, the interaction process between PCE and PCC is as follows:

[0083] S1: Node 1, as the PCC, sends a PCReq message to the PCE to request the service layer LSP1 from node 1 to node 2. The message carries the Association object, which contains the LAYER ASSOCIATION TLV, and the L bit is set to 1, notifying the PCE that the LSP is a lower layer LSP, and join the layer association group;

[0084] S2: PCE calculates the service layer path, saves the LSP information, creates a layer association group, adds the LSP1 to the association group, and returns the path calculation result to node 1;

[0085] S3: Node 2, as the PCC, sends a PCReq message to the PCE to request the service layer LSP2 from node 2 to node 3. The message carries the Association object, which contains the LAYER ASSOCIATION TLV, and the L b...

example 2

[0090] When a stateful PCE requests to adjust the bandwidth of the upper-layer LSP, it needs to consider adjusting the bandwidth of its service-layer LSP at the same time. Before the PCE requests to adjust the upper-layer bandwidth, it can find the relevant LSP according to the lower-layer LSP information in the association group. If it is increased, it first adjusts the bandwidth of the service layer; After calculating the path and adjusting resources, it sends a PCUpd message to the PCC to request to adjust the bandwidth of the LSP at the relevant level. Such as Figure 8 As shown, the interaction process between PCE and PCC is as follows:

[0091] S1: The PCE finds the relevant LSP according to the lower-layer LSP information in the association group, adjusts resources according to the bandwidth adjustment policy, calculates the path, and sends a PCUpd message to node 1 to request the bandwidth adjustment of the upper-layer LSP, and carries an Association object, which con...

example 3

[0094] When the lower-layer LSP changes, for example, when the lower-layer LSP is disconnected or deleted, the PCC finds its corresponding upper-layer LSP through the information of the association group, and sends a PCRpt message to notify the PCE. Such as Figure 9 As shown, the interaction process between PCE and PCC is as follows:

[0095] S1: The link between node 1 and node 2 fails, node 1 sends a PCRpt message to notify the PCE, carrying the Association object to delete the LSP in the association group, which contains the LAYER ASSOCIATION TLV, and the L bit is set;

[0096] S2: After receiving the message, the PCE finds the association group according to the Association object, deletes the lower-layer LSP, finds the upper-layer LSP corresponding to the lower-layer LSP, reports the link failure alarm of the upper-layer LSP, updates the upper-layer LSP, and restarts the LSP according to the policy. Create a lower-layer LSP or delete the multi-layer LSP.

[0097] Based ...

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Abstract

The invention discloses a multi-layer LSP control method and a multi-layer LSP control device. The multi-layer LSP control method comprises the steps of: acquiring a label switched path (LSP) additionrequest, wherein the LSP addition request carries identifier information used for identifying a layer associated group that an LSP is to be added to; and adding the LSP to the layer associated groupin response to the LSP addition request, wherein the layer associated group comprises an upper-layer LSP and a plurality of lower-layer LSPs. The multi-layer LSP control method and the multi-layer LSPcontrol device solve the technical problem that multi-layer LSP correlation association cannot be realized simply and effectively in the prior art, and achieve the technical effects of effectively reducing message exchange between PCC and PCE and optimizing the control efficiency of the multi-layer LSP.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a multilayer LSP control method and device. Background technique [0002] RFC4655 describes a structure based on Path Computation Element (PCE) for Multi-Protocol Label Switching (Multi-Protocol Label Switching, MPLS) and Generalized Multi-Protocol Label Switching (Generalized Multi-Protocol Switching). Label Switching, GMPLS for short) traffic engineering (Traffic Engineer, TE for short) path calculation for label switched paths (Label Switched Paths, LSP for short). [0003] Among them, a PCE is an entity, component, application or network node that can calculate a network path or route based on a network graph and apply calculation constraints. A path computation client (Path Computation Client, PCC for short) is a client application program that requests path computation to be performed by the PCE. [0004] It is proposed in RFC5440 that the PCEP protocol is used as a co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/723H04L45/50H04L45/02H04L45/28H04L47/724
CPCH04L45/50H04L45/645H04L47/724H04L45/02H04L45/04H04L45/28
Inventor 熊泉
Owner ZTE CORP