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Linear protection switching method applicable to large-capacity PTN (packet transport network) device

A linear protection switching and large-capacity technology, applied in data exchange networks, digital transmission systems, electrical components, etc.

Active Publication Date: 2011-08-10
FENGHUO COMM SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The fault detection time needs at least 10ms (3.3ms×3≈10ms), so the software processing time and chip action time are less than 40ms, which brings great pressure to the centralized switching process

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  • Linear protection switching method applicable to large-capacity PTN (packet transport network) device
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  • Linear protection switching method applicable to large-capacity PTN (packet transport network) device

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Embodiment Construction

[0053] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0054] The linear protection switching method suitable for large-capacity PTN equipment described in the present invention changes from centralized switching processing to distributed processing, and the specific implementation is as follows:

[0055] 1) At the communication source end node, the cross-connect unit is configured with three service forwarding instances of the main active NNI (Network Node Interface, Network Node Interface) port, standby NNI port, and active and standby NNI port. The service forwarding instance is static unicast Instance or static multicast instance, the matching keyword is the destination MAC address, respectively MACn1, MACn2, MACn3; in 1+1 protection mode, the service is always broadcast to the active and standby NNI ports; in the normal state of 1:1 protection mode In this state, the service is unicast to the active NNI port...

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Abstract

The invention relates to a linear protection switching method applicable to a large-capacity PTN (packet transport network) device. At a communication source end node, output ports are configured by a crossed unit into three service forwarding instances, namely a main NNI (network node interface) port, a standby NNI port, and a main-standby NNI port; keywords matched to generate target MAC (media access control) addresses, namely MACn1, MACn2, and MACn3; at a communication destination end node, the interface units of the main and standby NNI interfaces are respectively configured with service processing instances; and the keyword to be matched is a Tunnel label; however, only the main service instance is in activated state; during switching, corresponding switching operations are implemented according to protection modes (1-plus-1 protection and 1-to-1 protection). The most fundamental thought of the linear protection switching method applicable to the large-capacity PTN (packet transport network) device is to convert centralized switching into distributed switching; the crossed unit only implements high speed packet forwarding, and does not participate in switching motions; therefore, the switching motions are carried out by a plurality of service processing units; moreover, the service processing units process the switching motions concurrently, so the switching speed is improved by times.

Description

technical field [0001] The invention relates to a linear protection technology of a large-capacity packet transmission network, in particular to a linear protection switching method suitable for large-capacity PTN equipment. Background technique [0002] Packet Transport Network (PTN) is a packet-based, connection-oriented multi-service transport technology. PTN will soon be widely used in high-quality service bearing fields such as wireless backhaul, private line for VIP customers, and video-on-demand. It is designed for the bursty and statistical multiplexing requirements of packet traffic. PTN technology has a connection-oriented data forwarding mechanism, multi-service bearer, strong network scalability, rich OAM (Operation, Administration, Maintenance, referred to as OAM), strict QoS (Quality of Service, quality of service) mechanism and technical features such as carrier-level reliability. [0003] PTN's mainstream technical solutions can be divided into two categori...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L12/24H04L12/947
Inventor 柳光全江榕周志强
Owner FENGHUO COMM SCI & TECH CO LTD
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