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Local clock adjusting method, timing method and timing device

A technology of local clock and adjustment method, applied in the field of communication, can solve the problems of synchronization time error, unable to achieve the required accuracy of timing, and achieve the effect of improving accuracy, reducing existing errors and high accuracy

Active Publication Date: 2017-05-10
NANJING ZHONGXING XIN SOFTWARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main technical problem to be solved by the present invention is to provide a local clock adjustment method, a time service method and a device to solve the technical problem that the existing terminal equipment has a large error in synchronizing time from the base station and cannot achieve the required accuracy of time service

Method used

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  • Local clock adjusting method, timing method and timing device
  • Local clock adjusting method, timing method and timing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] figure 1 A schematic diagram of a local clock adjustment device provided in Embodiment 1 of the present invention, as shown in figure 1 As shown, the local clock adjustment device includes:

[0065] The receiving module 11 is used to receive the air interface signal sent by the base station;

[0066] An acquisition module 12, configured to acquire timing information from the air interface signal;

[0067] The adjustment module 13 is configured to adjust the local clock according to the timing information, including calculating a frequency offset of the local clock according to a predetermined method, and adjusting the frequency of the local clock according to the frequency offset.

[0068] In this embodiment, the receiving module 11 is responsible for receiving the air interface signal sent by the base station of the LTE system. The air interface signal may be an air interface signal sent by a sending unit designated by the LTE system through timing information gener...

Embodiment 2

[0087] Such as figure 2 As shown, it is a schematic diagram of a time service device provided in Embodiment 2 of the present invention, the service device includes: a local clock adjustment device 21, and a time service module 22;

[0088] The local clock adjustment device 21 is the local clock adjustment device provided in Embodiment 1, which is used to receive the air interface signal sent by the base station, obtain timing information from the air interface signal, and adjust the local clock according to the timing information, including: calculating the frequency offset of the local clock, and adjusting the frequency of the local clock according to the frequency offset;

[0089] The time service module 22 is configured to provide time service to other terminal devices according to the clock adjusted by the local clock adjustment device.

[0090] In this embodiment, the timing device is built into the terminal equipment, and the terminal equipment can directly receive the...

Embodiment 3

[0093] image 3 A flow chart of a local clock adjustment method provided by Embodiment 3 of the present invention includes the following process:

[0094] S301, receiving an air interface signal sent by the base station;

[0095] S302. Obtain timing information from the air interface signal;

[0096] S303. Adjust the local clock according to the timing information, which includes calculating a frequency offset of the local clock according to a predetermined method, and adjusting the frequency of the local clock according to the frequency offset.

[0097] In step S301, the air interface signal may be an air interface signal sent by the transmission unit designated by the LTE system through the timing information generated by the base station, or an air interface signal including timing information sent by other modules; regardless of whether the air interface signal If it is sent by other modules or a designated sending unit, neither the base station nor the terminal equipmen...

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Abstract

The invention discloses a local clock adjusting method, a timing method and a timing device The local clock adjusting method comprises extracting timing information from a received air interface signal, calculating the frequency offset amount of a local clock according to the timing information, and adjusting the local clock according to the frequency offset amount. Furthermore the invention provides a timing method which comprises adjusting the local clock according to the local clock adjusting method, and performing timing on other terminal equipment. Compared with prior art, the local clock adjusting method realizes higher accuracy of the local clock after adjustment. Furthermore the invention provides a lock clock adjusting device and a timing device so that a base station can directly receive the air interface signal which is transmitted from the LTE system for acquiring the timing information in the air interface signal. A GPS module or other hardware which is equipped on the base station or the terminal equipment for receiving the air interface signal of the base station is not required. A precision required for synchronous timing can be realized. Furthermore difficulty in base station wiring and base station maintenance difficulty are reduced.

Description

technical field [0001] The invention relates to the communication field, in particular to a local clock adjustment method, a timing method and a device. Background technique [0002] In an LTE (Long Term Evolution) system, a terminal device needs to be synchronized with a base station before accessing the network to ensure a unified clock of the base stations in the network. For this, when forming a network, the operator will configure a GPS (Global Positioning System, Global Positioning System) module for each base station. [0003] According to the characteristics of the LTE system, LTE requires terminal equipment to have high synchronization accuracy, and try to avoid inter-symbol interference and interference between terminal equipment. In the current technology, the synchronization of the terminal equipment is accomplished through a synchronization channel, where the synchronization channel includes a primary synchronization channel and a secondary synchronization chan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06H04W56/00
Inventor 王石磊
Owner NANJING ZHONGXING XIN SOFTWARE CO LTD
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