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Method for time synchronization in digital subscriber line communication system, device and system

A digital subscriber line, time synchronization technology, applied in the field of network communication

Inactive Publication Date: 2011-08-17
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a system based on SHDSL technology, the realization of high-precision time synchronization needs to solve many problems, which is difficult

Method used

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  • Method for time synchronization in digital subscriber line communication system, device and system
  • Method for time synchronization in digital subscriber line communication system, device and system
  • Method for time synchronization in digital subscriber line communication system, device and system

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Embodiment Construction

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0030] Embodiments of the present invention provide a method, device and system for time synchronization in a DSL system.

[0031] figure 1Shown is the principle diagram that the accurate time synchronization of the embodiment of the present invention realizes, and wherein, central office (Center Office, CO) equipment corresponds central office SHDSL transceiver unit (SHDSL TransceiverUnit at Center Office, STU-C), comprises master clock; Client The end (Customer ...

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Abstract

The embodiment of the invention relates to a communication system and a method and a device for time synchronization in the system. The communication system comprises a first subscriber line transceiver and a second subscriber line transceiver, wherein the second subscriber line transceiver is used for performing information interaction together with a single pair high-speed digital subscriber line SHDSL link so as to acquire a time deviation between the first and second subscriber line transceivers, and adjusting the local time according to the time deviation in order to keep the time synchronization with the first subscriber line transceiver. The first and second subscriber line transceivers acquire the sending time and the receiving time by utilizing a SHDSL frame synchronization clock in a transmission gathering layer and / or SHDSL sign clock in a physical media related layer. By the using of the method provided by the embodiment of the invention, the requirement of shift loading time synchronization is met.

Description

technical field [0001] The present invention relates to the technical field of network communication, in particular to a method, device and system for time synchronization in a communication system. Background technique [0002] Due to the emergence of third-generation mobile communications (3G) and more advanced digital mobile technologies, the rate of wireless access is getting higher and higher, and the access distance is getting shorter and shorter, and there is even a trend of evolution from base stations to homes. In terms of means to realize Mobile Backhaul, traditional mobile backhaul technologies include: optical fiber, E1 / T1, microwave, etc. In recent years, some new mobile backhaul (Mobile Backhaul) technologies have emerged continuously, such as adopting synchronous Ethernet, Digital Subscriber Line (Digital Subscriber Line, DSL) technologies, and the like. With the evolution of base stations to home base stations, mobile backhaul is becoming more and more sensi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W56/00H04B7/26
Inventor 冯儒洲李飞李东徐贵今
Owner HUAWEI TECH CO LTD