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Method and system for bidirectionally transmitting message in MPLS (Multi-Protocol Label Switching) network

A two-way transmission and message technology, applied in the field of message transmission, can solve the problems of high LSP management complexity and inability to apply clock synchronization, etc., and achieve the effect of reducing management complexity

Active Publication Date: 2012-02-01
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of this, the main purpose of the present invention is to provide a method and system for two-way transmission of messages in the MPLS network, which can ensure that the paths passed by the two-way transmission of messages in the MPLS network are exactly the same, and solve the complicated management of LSPs in the MPLS network. The problem of high precision and clock synchronization that cannot be applied to IEEE1588v2

Method used

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  • Method and system for bidirectionally transmitting message in MPLS (Multi-Protocol Label Switching) network
  • Method and system for bidirectionally transmitting message in MPLS (Multi-Protocol Label Switching) network
  • Method and system for bidirectionally transmitting message in MPLS (Multi-Protocol Label Switching) network

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Embodiment 1

[0063] In this embodiment, a P2MP LSP is established between one Ingress PE node, n Transit PE nodes, and m Egress PE nodes in the MPLS network, and transmits messages belonging to the same service, where n and m are An integer not less than 1.

[0064] Such as image 3 As shown, in this embodiment, the method for realizing bidirectional transmission of packets with bandwidth and QoS guarantee may specifically include the following process:

[0065] Step 301, generate label forwarding tables for the Ingress PE nodes, n Transit PE nodes, and m Egress PE nodes in the MPLS network respectively through user configuration or dynamic protocols, and establish a forward path and a reverse path identical to the forward path. To the P2MP LSP of the path, and allocate bandwidth resources and QoS resources for the established P2MP LSP, continue to step 302 and / or step 305;

[0066] Specifically, in the label forwarding table of the Ingress PE node, the first label forwarding table inclu...

Embodiment 2

[0084] Such as Figure 4 As shown, in an MPLS network, the method for realizing bidirectional transmission of packets without bandwidth and QoS guarantee may specifically include the following procedures:

[0085] Step 401 is basically the same as step 301, except that step 401 does not include the process of "allocating bandwidth resources and QoS resources for the established P2MP LSP".

[0086] Steps 402-407 are basically the same as steps 302-307, except that each step does not include the process of "guaranteeing QoS and bandwidth for packet processing at the same time", and the other steps are completely the same.

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Abstract

The invention discloses a method for bidirectionally transmitting a message in an MPLS (Multi-Protocol Label Switching) network, which mainly comprises the following steps of: establishing a P2MP (Point-to-Multipoint) LSP (Label Switching Path) with a forward path and a backward path between an Ingress PE node of the MPLS network and at least one Egress PE node, wherein the node through which the backward path passes is the same as that through which the forward path passes; when the Ingress PE node receives a message transmitted by a user side, transmitting the message to each Egress PE node along the forward path of the P2MP LSP; and when the Egress PE node receives the message transmitted by the user side, transmitting the message to the Ingress PE node along the backward path of the P2MP LSP. The invention further discloses a system for realizing bidirectional transmission of the message in the MPLS network. According to the invention, the management complexity of the LSP in the MPLS network can be greatly reduced; in addition, the method and the system can be applied to clock synchronization of IEEE (Institute of Electrical and Electronic Engineers) 1588v2; and on the premise of ensuring the clock precision, the number of intermediate transmission nodes by which the IEEE1588v2 can span between a main clock and a slave clock is not limited.

Description

technical field [0001] The invention relates to a message transmission technology in a Multi-protocol Label Switching (MPLS, Multi-protocol Label Switching) network, in particular to a method and a system for bidirectionally transmitting messages in an MPLS network. Background technique [0002] With the rapid development of the broadcast video service, the broadcast video service begins to be carried on the packet network, thus prompting the widespread application of the multicast technology. Due to the advantages of the MPLS technology in terms of traffic engineering, service quality, and reliability, the MPLS multicast technology has also been developed rapidly, and has been standardized in the Internet Engineering Task Force (IETF, The Internet Engineering Task Force). [0003] The current MPLS multicast technology mainly takes a point-to-multipoint (P2MP, Point to Multiple Point) label switching path (LSP, Label Switching Path) as the main body to provide multicast repl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L45/50
Inventor 金利忠宿飞
Owner ZTE CORP
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