Time synchronization method, server and system

A time server and time synchronization technology, which is applied in the field of communication, can solve problems such as low system reliability, inability of satellites to achieve time synchronization, and failure to meet the needs of communication time synchronization, so as to achieve time synchronization, meet mobile communication needs, and improve system reliability. sexual effect

Active Publication Date: 2014-09-10
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The inventor found that the two methods in the prior art cannot achieve time synchronization when the satellite fails for a long time, cannot meet the communication time synchronization requirements, and the system reliability is low

Method used

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  • Time synchronization method, server and system
  • Time synchronization method, server and system
  • Time synchronization method, server and system

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Embodiment Construction

[0022] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0023] Method embodiment

[0024] figure 1 It is a schematic diagram of Embodiment 1 of the time synchronization method and system according to the present invention. Such as figure 1 As shown, the time synchronization system of this embodiment includes:

[0025] The ground centralized clock source A and the backup ground centralized time source B mainly provide unified high-precision frequency information.

[0026] Time server A, time server B, and time server C receive the frequency information of the ground centralized clock source A or B, and calculate the current time according to the initial time input during the initial construction of the system and the received frequency...

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Abstract

The invention discloses a time synchronization method, server and system. The method comprises the following steps that: a time server receives frequency information sent by a ground centralized clock source; and the time server calculates time according to the frequency information and the initial time, and sends the time information to a downstream base station. Through the method, the server and the system, the defect of low reliability of time synchronization in the prior art can be solved, and time synchronization still can be realized when a satellite is failed for a long time.

Description

Technical field [0001] The present invention relates to transmission and IP technology in the communication field, and in particular to a time synchronization method, server and system. Background technique [0002] With the development of mobile communication technology, systems such as Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) and CDMA2000 have high-precision time synchronization requirements. For TD-SCDMA systems, the same In frequency networking, if the time deviation of the two base stations exceeds the system critical value of 3 microseconds, it will cause interference between time slots and between uplink and downlink frames. For the CDMA2000 system, the cell dominant frequency codes are distinguished by time and phase. If the time deviation between base stations exceeds 10 microseconds, it will cause errors in the judgment of the pilot codes and problems with cell identification and handover. In the prior art, it is possible to install a global p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00
Inventor 韩柳燕李晗
Owner CHINA MOBILE COMM GRP CO LTD
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