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Crossed ring network protection method, equipment and system

A protection system and ring protection technology, applied in the field of communications, can solve the problems of low bandwidth utilization, only 50% bandwidth utilization, etc., and achieve the effect of improving bandwidth utilization

Active Publication Date: 2012-07-04
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the above MPLS ring protection scheme, it is necessary to allocate bandwidth for the working ring and the protection ring of the MPLS ring to protect against faults within the ring. At this time, the actual bandwidth utilization rate is only 50%.
In addition, in the above-mentioned MPLS ring protection scheme, in order to realize end-to-end protection of cross-ring services, on the basis of 50% bandwidth utilization, the working ring needs to allocate bandwidth for the working logical path and the protection logical path, which is actually only 25% of link bandwidth is used to transmit traffic, which results in low actual bandwidth utilization

Method used

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  • Crossed ring network protection method, equipment and system
  • Crossed ring network protection method, equipment and system
  • Crossed ring network protection method, equipment and system

Examples

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Effect test

example 1

[0057] In this example, assume that the link between node A and node F, and the link between node F and node E fails. Such as Figure 7 As shown, the cross-ring service enters the first ring at node B, and node B sends the cross-ring service to the intersecting node group along the working channel (clockwise direction) of the cross-ring channel. Since the link between node A and node F occurs Therefore, at node A, the cross-ring channel will be switched from the working channel to the protection channel (counterclockwise), and the cross-ring service will continue to be transmitted along the protection channel.

[0058] If the protection channel is closed (wrapping), node A forwards the cross-ring service to node E along the protection channel A→B→C→D→E. Since the link between node E and node F is also faulty, the , after the cross-ring service is transmitted to node E, the cross-ring channel will be switched back to the working channel again, and the cross-ring service will c...

example 2

[0064] Such as Figure 8 As shown, it is assumed that the link between node A1 and node B1 and the link between node E1 and node F fail.

[0065] After the cross-ring service enters the first ring from node B, it is transmitted to the intersecting node F along the working channel B→A→F of the cross-ring channel.

[0066] The intersecting node F determines that the cross-ring service comes from the upper ring point according to the incoming label of the cross-ring service. Therefore, after receiving the cross-ring service, the intersecting node F determines the presence of the cross-ring service according to the service information of the cross-ring service. The lower ring point of the second ring is node B1; the intersecting node F obtains the fault state of the second ring according to the received automatic protection switching message of the second ring, and judges the intersecting node F according to the ring topology of the second ring Whether the cross-ring service is c...

example 3

[0071] Such as Figure 9 As shown, assume that the intersection node F fails.

[0072] The cross-ring service enters the first ring at node B, and node B sends the cross-ring service to the intersecting node group along the working channel of the cross-ring channel, such as Figure 9 As shown, because the intersecting node F fails, it is unreachable. Therefore, after the cross-ring service is transmitted to node A, the cross-ring channel will be switched to the protection channel, and the cross-ring service will continue to be transmitted along the protection channel to the intersecting node group. Another intersection node D.

[0073] The intersecting node D determines that the cross-ring service comes from the upper ring point according to the incoming label of the cross-ring service, and the intersecting node D is not the last intersecting node. Therefore, after the intersecting node D receives the cross-ring service, it Business information, it is determined that the off...

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Abstract

The invention discloses crossed ring network protection method, equipment and system, belongs to the communication field, realizes protection of a crossed ring network with less bandwidth, and improves the bandwidth utilization ratio. The method comprises the following steps: a first crossed node in a crossed node group receives span-ring services and determines the ring setting points of the span-ring services in a second ring according to the service information of the span-ring services; and the first crossed node is not communicated with the ring setting points of the span-ring service in the second ting, and the first crossed node is not the final crossed node, the first crossed node forwards the span-ring services to the second crossed node.

Description

technical field [0001] The present invention relates to the communication field, in particular to an intersecting ring protection method, device and system. Background technique [0002] Multi-Protocol Label Switching (English full name: Multi-Protocol Label Switching hereinafter referred to as: MPLS) is a system based on fast data packet switching and routing, which realizes fast forwarding of packet services. It provides routing, forwarding and ability to exchange. A ring network based on MPLS technology can be called an MPLS ring, and multiple MPLS rings can also intersect at one or more nodes to form a network structure in which MPLS rings intersect (hereinafter referred to as: MPLS intersecting rings), such as figure 1 shown. [0003] A logical path for transmitting service flows between nodes in the MPLS ring may be implemented based on a Label Switching Path (English full name: Label Switching Path, hereinafter referred to as: LSP). The MPLS ring is composed of an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L45/247H04L45/28H04L45/50
CPCH04Q11/0062H04Q2011/0077H04Q2011/0081H04L41/0663H04L41/0654H04L45/28H04Q2011/0092H04L12/437H04J14/0283H04L12/4637
Inventor 孙光辉徐前锋赫英海
Owner HUAWEI TECH CO LTD
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