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ECMP path soft resuming method in MPLS-TP packet transmission network

A packet transmission network and soft recovery technology, which is applied in the field of communication, can solve problems such as limiting the flexibility of packet networks, and achieve the effects of reducing recovery time, improving utilization efficiency, and enhancing flexibility

Inactive Publication Date: 2009-04-29
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, MPLS-TP still has deficiencies in flow control and congestion control under ECMP. At present, MPLS-TP network mainly realizes the control of a single connection by restricting the use of ECMP, but this operation greatly limits the flexibility of the packet network. characteristic

Method used

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  • ECMP path soft resuming method in MPLS-TP packet transmission network
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  • ECMP path soft resuming method in MPLS-TP packet transmission network

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Embodiment Construction

[0023] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] figure 1 Shows the problem description based on the packet transfer network, where 101, 102, ..., 1010 respectively represent 10 transfer routers based on the packet network, 101-102-103-104, 101-105-106-107-104 , 101-108-109-1010-104 represent three LSP paths respectively. Due to the use of ECMP, a single service transmission will go through different routes, and there will be different numbers belonging to the same service session on each path. The three connected services The sequence numbers (SN) are 1, 4, 7..., 2, 5, 6, 8,..., 3, 9,... and in the receiving section, the business is re-started according to the number of the business group merge. As shown in the figure, the internal buffer queues of the three routers 102, 103, and 104 are given respectively. After the buffer of 103 is full, an overflow occurs, which will affect the transmissi...

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Abstract

The present invention relates to communication field, wherein an embodiment of the invention discloses an ECMP path soft recovery method in a MPLS-TP packet transfer network. The embodiment of the invention comprises the following steps: realizing functions of congestion discovering, congestion positioning, etc. by the expanded OAM information; transmitting TDM grouping dynamic clock by MPLS-TP for adjusting operation; path cracking of the bypass heavy routing; when congestion occurs, firstly adjusting TDM service data grouping length through a source end for improving the delay characteristic; adopting a local service for shunting to the service with overhigh speed for steering clear of the congestion routing; if local link resource is insufficient, informing the source end for adjusting the bandwidth allocation, allocating higher bandwidth resource on the other N-1 paths; if no enough resources can be allocated or the allocated resources are not adjusted under the principle of simplifying the operation, informing the routing module by the source end, and completing the calculation of the other routing through the mode of incremental computation according to the bandwidth request amount. The method of the invention reduces the time for recovering network congestion. The network flexibility can be enhanced through the mode of self-adapting grouping variable-length transmission, and the using efficiency of the protected resource is increased. The quick performance recovery of the service is realized through the mode of bypass heavy routing cracking. The quick combining operation at the branching point is completed with a special numbering and a signaling process.

Description

technical field [0001] The invention relates to the communication field, in particular to an ECMP path soft recovery method in an MPLS-TP packet transmission network. Background technique [0002] MPLS (Multiprotocol Label Switching, referred to as Multiprotocol Label Switching) is developing from the current point-to-point (Point-To-Point, referred to as P2P) connection to point-to-multipoint (Point-To-Multipoint, referred to as P2MP) connection, so Complicated connections require an effective mechanism to quickly locate faults so that faults can be recovered quickly. MPLS-TP (MPLS Transport Profile, referred to as MPLS transmission framework) is the product of ITU-T and IETF two standardization organizations that need to reach a consensus on the standardization of MPLS transmission. It expands many aspects of the initial MPLS specification of IETF, involving OAM, survival It aims to improve the functions and interoperability characteristics of the transport network. IETF...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L45/50
Inventor 李彬张永军尧昱黄善国顾畹仪
Owner BEIJING UNIV OF POSTS & TELECOMM
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