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Method and apparatus for extracting clock, and network communication equipment

A network communication and clock technology, applied in the field of communication, can solve the problems of complex system, high cost, inconsistent clock extraction methods, etc., and achieve the effect of reducing cost and simplifying system design.

Active Publication Date: 2009-01-14
HUAWEI TECH CO LTD
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Problems solved by technology

[0003] The technical problem to be solved by the embodiment of the present invention is: to provide a method, device and network communication equipment for extracting the clock, which overcomes the inadequacy of the method of extracting the clock in the prior art Unified, high cost, complex system defects

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  • Method and apparatus for extracting clock, and network communication equipment
  • Method and apparatus for extracting clock, and network communication equipment
  • Method and apparatus for extracting clock, and network communication equipment

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Embodiment Construction

[0011] The embodiments of the present invention will be further described below in conjunction with the drawings and examples.

[0012] In Ethernet, clock extraction methods include Synchronous Ethernet SyncE (Synchronous Etherent) method, link layer synchronization method, and Ethernet precision time protocol IEEE1588 method. Among them, the link layer synchronization method emulates PWE3 (PseudoWireEmulationEdge -to-Edge) clock extraction method is the most representative.

[0013] Such as figure 1 As shown, it is a schematic diagram of a device for extracting a clock provided by an embodiment of the present invention, including: a data stream receiving module 101, a data stream forwarding module 102, and a data stream clock processing module 103; wherein:

[0014] Each transmission port of the data stream receiving module 101 can receive at least two types of data streams, and the at least two types include: edge-to-edge pseudowire emulation PWE3 and Ethernet precision tim...

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Abstract

The embodiment of the present invention discloses a clock extraction method, device and network communications equipment. Each transmission port of the network communication equipment can receive at least two types of data streams, the at least two types include: Pseudo-Wire Emulation Edge-to-Edge (PWE3) and Precision Time Protocol IEEE 1588 over Ethernet. The method includes receiving data stream come from a first transmission port, and identifying the types of the data streams; performing clock extraction to the data stream according to the identification result, wherein, if the data stream type is PWE3, performing PWE3 clock extraction to the data stream, and the data stream type is IEEE1588, performing IEEE1588 clock extraction to the data stream. The embodiment of the present invention supports a plurality of clock extraction modes for extracting clocks, thereby simplifying system design and reducing costs.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method and device for extracting a clock and network communication equipment. Background technique [0002] In the Ethernet, the existing forwarding chips only support a single clock extraction method, and the application range is limited due to the non-uniform method of extracting the clock. Moreover, when it is necessary to implement multiple clock extraction methods, it is necessary to use multiple forwarding chips that support different types of clock extraction methods, resulting in increased costs and complex systems. Contents of the invention [0003] The technical problem to be solved by the embodiments of the present invention is to provide a method, device and network communication equipment for extracting clocks, which overcome the defects of inconsistent clock extraction methods, high cost, and complex systems in the prior art. [0004] In order to solve th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L12/56H04L7/00
Inventor 王苏叶涵玉
Owner HUAWEI TECH CO LTD
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