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Time synchronization method, system and customer terminal

A time synchronization and client-side technology, applied in the direction of synchronization devices, transmission systems, digital transmission systems, etc., can solve the problems of low synchronization accuracy and time synchronization dependence on external protocols, etc., achieve flexible parameter configuration, enhance independence and robustness, The effect of improving accuracy

Active Publication Date: 2009-05-06
ZTE CORP
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Problems solved by technology

[0006] In view of this, the main purpose of the present invention is to provide a time synchronization method, system and client to solve the existing problem that time synchronization relies too much on external protocols and the synchronization accuracy is not high

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  • Time synchronization method, system and customer terminal
  • Time synchronization method, system and customer terminal
  • Time synchronization method, system and customer terminal

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Embodiment Construction

[0042] The technical solutions of the present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0043] The time synchronization method provided by the present invention is mainly realized based on the two-way frame delay measurement mechanism of T-MPLS network performance. Bidirectional frame delay measurement principle of T-MPLS network performance, such as figure 2 As shown, the local node sends a Double-way Frame Delay Measurement Message (DMM, Double-way Frame Delay Measurement Message) message to the peer node, and the DMM message is marked with the sending time TxTimeStamp_f of the DMM message. The peer node receives the DMM message, records the receiving time RxTimeStamp_f of the DMM message, generates a two-way frame delay measurement response (DMR, Double-way Frame Delay Measuremet Reply) message and returns it to the local node. The DMR message is stamped with RxTimeStamp_f and the sending time TxTi...

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Abstract

The invention discloses a time synchronization method which comprises the steps: a client sends synchronous doubleaction frame delay measurement (SDMM) messages which carry the sending time of the client; the client receives synchronous doubleaction frame delay measurement response (SDMR) messages ( SDMR) returned from a server, records the client receiving time of the SDMR messages, and extracts the client sending time of the SDMM messages from the SDMR messages, the server receiving time of the SDMM messages, and the server sending time of the SDMR messages; therefore, the client calculates nonsynchronous time difference, and adjusts the personal clock value according to the difference so as to be synchronous with the server. The invention also discloses a time synchronization system and a client, can be realized without depending on external network time synchronization protocol (NTP), has high synchronization precision, and also enhances the independence and the robustness of transporting multi-protocol label switching (T-MPLS) network functions.

Description

technical field [0001] The invention relates to a time synchronization technology for nodes in a Transport Multi-Protocol Label Switching (T-MPLS, Transport Multi-Protocol Label Switching) network, in particular to a time synchronization method, system and client. Background technique [0002] Transport Multi-Protocol Label Switching (T-MPLS, Transport Multi-Protocol Label Switching) is a packet transport network technology standardized by the International Telecommunication Union (ITU, International Telecommunication Union), which solves the traditional Synchronous Digital Hierarchy (SDH, Synchronous Digital Hierarchy ) is a mainstream packet transmission technology recognized by the industry because of the low efficiency exposed in the network environment dominated by packet switching. [0003] The data forwarding plane of T-MPLS is a subset of Multi-Protocol Label Switching (MPLS, Multi-Protocol Label Switching). T-MPLS removes the connectionless forwarding feature based ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L7/00H04L12/56H04L29/06
Inventor 刘银恩
Owner ZTE CORP
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