Time synchronization signal and frequency synchronization signal providing method and apparatus

A time synchronization and signal technology, which is applied in the direction of synchronization devices, wireless communications, electrical components, etc., can solve problems such as base station slippage and failure to work normally, and achieve the effects of improving security, speeding up deployment, and reducing investment

Active Publication Date: 2015-10-14
CHINA MOBILE GRP GUANGDONG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] At present, when GPS cannot be installed, the base stations of each communication network can only be obtained from their respective transmission networks (supporting 1588v2)
For some co-construction and sharing occasions, when the transmission system is unique (such as provided by one of the multiple communication networks participating in the co-construction and sharing, or provided by a third party), since each communication network has its own clock synchronization network, each The synchronization network of the communication network may have frequency or time differences. When the frequency and ti

Method used

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  • Time synchronization signal and frequency synchronization signal providing method and apparatus
  • Time synchronization signal and frequency synchronization signal providing method and apparatus
  • Time synchronization signal and frequency synchronization signal providing method and apparatus

Examples

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Example Embodiment

[0042] Example one

[0043] figure 1 Shows the main flowchart of the method for providing a time synchronization signal according to the first embodiment of the present invention.

[0044] See figure 1 As shown, the methods for providing time synchronization signals include:

[0045] S101: The time synchronization signal of each communication network is transmitted to the interface device step by step at the core layer and the first group of transmission nodes of the convergence layer of each communication network transmission network, wherein the first group of transmission nodes all work in the clock BC mode;

[0046] S103: At the access layer of the interface device and a shared transmission network, the time synchronization signals of each communication network are respectively transmitted to the base station corresponding to each communication network through the second group of transmission nodes, wherein the The second group of transmission nodes all work in the clock TC mode. ...

Example Embodiment

[0053] Example two

[0054] figure 2 It shows a specific flowchart of the method for providing a time synchronization signal according to the second embodiment of the present invention.

[0055] See for details figure 2 As shown, usually, the clock path nodes of the transmission network all work in the clock BC mode, figure 2 In the core layer of the transmission network, the transmission nodes of the convergence layer work in the clock BC mode, and the time signal obtained from the clock source is passed down to the packet transmission network equipment PTN-1 / PTN-2, PTN-1 / PTN. -2 and below the shared transmission network (access layer equipment) all work in the clock TC mode.

[0056] The reason for this design is that when the transmission device works in clock BC mode, the clock node parses the 1588v2 message from the signal from the upstream, restores the time signal and continues to transmit it downstream, and the BC mode can only track the upstream clock Signal, assuming th...

Example Embodiment

[0057] Example three

[0058] image 3 This is a schematic structural diagram of the apparatus for providing a time synchronization signal according to the third embodiment of the present invention.

[0059] See image 3 As shown, the device for providing time synchronization signals includes: a first transfer module 30, used for each communication network time synchronization signal to be transferred step by step down to the interface at the core layer and convergence layer of each communication network transmission network. Device, wherein the first group of transmission nodes all work in clock BC mode; the second transfer module 32 is used to connect the interface device and a shared transmission network at the access layer, and the time synchronization signals of each communication network pass through the The two groups of transmission nodes are respectively transmitted to the base station corresponding to each communication network step by step, wherein, the second group of t...

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Abstract

The invention discloses a time synchronization signal and frequency synchronization signal providing method and apparatus and is used for providing synchronized clock signals for various mobile communication base stations based on one transmission network. The providing method comprises that time synchronization signals of each communication network are downwardly transmitted to interface equipment step by step at a first group of transmission nodes of a transmission network core layer and a distribution layer of each communication network, wherein the first group of transmission nodes all work in the clock BC mode; and at an access layer of the interface equipment with a share transmission network, the time synchronization signals of each communication network are transmitted to a base station corresponding to the communication network step by step through a second group of transmission nodes, wherein the second group of transmission nodes all work in a clock TC mode. The invention is suitable for conditions that multiple communication networks require sharing of a third party transmission system or a multi-party communication network co-building and sharing transmission system due to faults, so that the equipment investment cost is reduced, and the address selection of a mobile communication base state is free of limitation of GPS installation conditions.

Description

technical field [0001] The present invention relates to the field of mobile communication, and more specifically, to a method and device for providing a time synchronization signal and a frequency synchronization signal. Background technique [0002] The normal work of various mobile communication base stations (GSM, CDMA2000, TD-SCDMA, WCDMA, TD-LTE, etc.) must rely on the frequency synchronization or time synchronization of the network, of which GSM and WCDMA only need to provide frequency synchronization signals, while TD-SCDMA , TD-LTE, and CDMA2000 base stations need to provide time and frequency synchronization signals at the same time, as shown in the following table: [0003] wireless system Clock (frequency) synchronization requirements Time (Phase) Synchronization Requirements GSM 0.05ppm NA WCDMA 0.05ppm NA TD-SCDMA 0.05ppm ±1.5us CDMA2000 0.05ppm ±3us TD-LTE 0.05ppm ±1.5us...

Claims

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Application Information

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IPC IPC(8): H04W56/00
CPCH04W56/001
Inventor 李伯伦吕锦扬夏国良
Owner CHINA MOBILE GRP GUANGDONG CO LTD
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