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Clock back-up system in communication device

A technology for communication equipment and clock backup, applied in the direction of automatic power control, electrical components, selection devices, etc., can solve the problems of high clock backup cost, high price of rubidium clock and OCXO, and achieve low cost, reduce backup cost, and reduce costs Effect

Inactive Publication Date: 2006-11-08
SHANGHAI HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In practical application, the above scheme has the following problems: the price of rubidium clock and OCXO is very high, which leads to the high cost of clock backup in the communication system

Method used

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0026] In general, the principle of the clock backup system of the present invention is to use a Temperature Compensated Voltage Controlled Crystal Oscillator (Temperature Compensated Voltage Controlled Crystal Oscillator, referred to as "TCVCXO") as the backup clock instead of the OCXO, while meeting the reliability requirements of the base station system , the cost of the standby clock is reduced to about one-fifth of that when the OCXO is used, and in the present invention, the single-configuration clock board scheme can be adopted to simplify the configuration.

[0027] The general idea before presenting the present invention is that although the accuracy of TCVCXO can meet the reliability requirements of the backup clock, the vibration frequency will change wi...

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Abstract

This invention discloses a clock bachup system in a communication device to reduce the cost for clock backup of the base stations on the basis of meeting the reliability of clocks, which takes TCVCXO as the standby clock of a communication device (base station), the primary and standby clocks are designed in two phase locking loops of a same signle board to carry out the switch by locking the loops and the reference source and clock test.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to clock backup technology in mobile communication network. Background technique [0002] In the past 20 years, the development of mobile communication technology has gone through two generations, from the first generation of analog cellular communication technology to the second generation of digital communication represented by Global System for Mobile Communications (Global System for Mobile Communications, referred to as "GSM") technology transition. Now it is developing towards the third generation mobile communication system (Third Generation Mobile Communications System, referred to as "3G"). [0003] In the development process of communication technology, the reliability of the working clock of the base station is continuously put forward higher requirements in the communication system. Currently, the reliability is improved by configuring active and standby clock boards....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03L7/00H03L7/07H03L7/08H04Q7/30H04Q7/34
Inventor 屈涛
Owner SHANGHAI HUAWEI TECH CO LTD
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