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Consultation method of node association channel capability and node device

A node device and node technology, applied in the field of communication, can solve problems such as wrong forwarding, discarding or being forwarded to the user side, and nodes not being able to understand the capabilities of associated channels

Active Publication Date: 2010-11-03
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the prerequisite for realizing the transmission of special messages in the associated channel is the negotiation of the associated channel capability between nodes at the LSP level. If the associated channel is used directly without negotiation, some nodes that do not support the associated channel capability will receive special messages. will be discarded or forwarded to the user side, resulting in the loss or wrong forwarding of packets transmitted through the associated channel
[0008] The inventor found that since there is no negotiation mechanism for the associated channel capabilities between nodes at the LSP level, the nodes cannot know the associated channel capabilities of other nodes, so that it is impossible to avoid the loss or wrong forwarding of special messages transmitted through the associated channels

Method used

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  • Consultation method of node association channel capability and node device
  • Consultation method of node association channel capability and node device
  • Consultation method of node association channel capability and node device

Examples

Experimental program
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Embodiment 1

[0030] See figure 2 , figure 2 This is a flowchart of a method for negotiating a node's associated channel capability provided in the first embodiment of the present invention. Such as figure 2 As shown, the method can include:

[0031] 201: The node receives a Path message sent by the upstream node that carries the capability of the upstream node's associated channel;

[0032] For example, in the Path message sent by the upstream node, the Path message may include a certain number of variable-length object fields, and the object field may carry the upstream node's associated channel capability.

[0033] The upstream node may include one or more nodes located upstream of the current node. If the number of upstream nodes is multiple, the object field in the Path message received by the current node may carry the associated channel capabilities of multiple upstream nodes.

[0034] It should be noted that the node described in this embodiment and subsequent embodiments may be a label ...

Embodiment 2

[0069] Below figure 1 The illustrated example uses the Path message and the Resv message to establish an LSP to introduce the method for negotiating a node's associated channel capability provided in the embodiment of the present invention. The node in the embodiment of the present invention is the LSR on the LSP established by using the Path message and the Resv message.

[0070] Such as figure 1 As shown, the first node 1 assembles a path message, which carries the associated channel capability of the first node 1 and sends it to the intermediate node 2;

[0071] The associated channel capability described in the embodiment of the present invention may include: the support capability of the reserved tag 13, the support capability of the associated channel, and the support of the associated channel type (such as OAM, automatic protection switching, management control channel, command control channel, etc.) Capabilities, and the supporting capabilities of OAM tool types such as LSP...

Embodiment 3

[0118] See image 3 , image 3 This is a flowchart of a method for negotiating a node's associated channel capability provided in Embodiment 3 of the present invention. Such as image 3 As shown, the method can include:

[0119] 301: Receive a Path message sent by an upstream node that carries the associated channel capability of the upstream node;

[0120] For example, in a Path message sent by an upstream node, the Path message may include a certain number of variable-length object fields, and the object field may carry the upstream node's associated channel capability.

[0121] 302: Create a new Path message and send it to a downstream node. The newly created Path message includes the upstream node's associated channel capability;

[0122] For example, 302 may include:

[0123] New Path message;

[0124] Write the associated channel capability of the upstream node in the variable-length target object field in the newly created Path message;

[0125] The newly created Path message writ...

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Abstract

The invention discloses a consultation method of node association channel capability and a node device, which relates to the technical field of communications, wherein the consultation method of the capability of the node association channel comprises the following steps of: receiving a Path message sent by an upstream node and carrying with upstream node association channel capability; creating a Path message which comprises the upstream node association channel capability, and sending the Path message to a downstream node; receiving a Resv message sent by the downstream node and carrying with downstream node association channel capability information; and creating a Resv message which comprises the downstream node association channel capability, and sending the Resv message to the upstream node. The embodiment of the invention can realize association channel capability consultation between nodes at a label switch path (LSP) level, so that the nodes at the LSP level can know about the association channel capability of other nodes, and the missing or mistake retransmission of special messages transmitted through an association channel can be avoided.

Description

Technical field [0001] The present invention relates to the field of communication technology, and in particular to a method and node equipment for negotiating the capability of a node associated channel. Background technique [0002] The Resource Reservation Protocol-Traffic Engineering (RSVP-TE, Resource Reservation Protocol-Traffic Engineering) based on the expansion of traffic engineering is used as a supplementary protocol to the Resource Reservation Protocol (RSVP) for multi-protocol label switching (MPLS, Multi-Protocol Label Switch) The network establishes label switched paths (LSP, Label Switched Paths). [0003] The LSP established by RSVP-TE has a resource reservation function, so that the services transmitted on the LSP are guaranteed. figure 1 It is a schematic diagram of establishing LSP using RSVP-TE. Such as figure 1 As shown, when using RSVP-TE to establish an LSP, it mainly relies on two messages, namely the Path message and the Resv message; the establishment of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/20H04W28/26H04W88/14H04L12/54H04L47/724
CPCH04L69/24H04L12/5695H04L47/748H04L47/724H04L29/06537H04L47/70
Inventor 国辛纯
Owner HUAWEI TECH CO LTD
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