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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 time signals of the shared transmission network are different from the frequency and time synchronization signals of each communication network, the frequency and time obtained by the base stations of each communication network from the shared transmission network The synchronization signal may have the risk of the base station slipping code or directly failing to work normally
[0012] Therefore, in the scenario of sharing the transmission system, there is currently no solution for simultaneously providing reliable frequency and time synchronization signals for the base stations of multiple communication networks

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

Experimental program
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Embodiment 1

[0043] figure 1 A main flowchart showing the method for providing a time synchronization signal according to Embodiment 1 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 the transmission network of each communication 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 the communication networks are respectively transmitted to base stations corresponding to the communication networks step by step through the second group of transmission nodes, wherein the The second group of transmission nodes all work in the clock TC mode.

[004...

Embodiment 2

[0054] figure 2 A specific flow chart showing the method for providing a time synchronization signal according to Embodiment 2 of the present invention.

[0055] For details, see 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 aggregation layer all work in the clock BC mode, and the time signal obtained from the clock source is passed down step by step to the packet transport network equipment PTN-1 / PTN-2, PTN-1 / PTN -2 and below shared transmission network (access layer equipment) all work in clock TC mode.

[0056] The reason for this design is that when the transmission device works in the clock BC mode, the clock node parses the 1588v2 message from the upstream signal, recovers the time signal and continues to transmit it downstream, and the BC mode can only track the upstream clock Signal, assuming that PTN-1 / PTN-2 is track...

Embodiment 3

[0058] image 3 A schematic structural diagram of the device for providing a time synchronization signal according to Embodiment 3 of the present invention is shown.

[0059] see image 3 As shown, the device for providing time synchronization signals includes: a first transmission module 30, which is used to transmit the time synchronization signals of each communication network down to the interface step by step at the core layer of each communication network transmission network and the first group of transmission nodes at the convergence layer equipment, wherein the first group of transmission nodes all work in the clock BC mode; the second transmission module 32 is used to connect the interface equipment and a shared transmission network access layer, and the time synchronization signals of each communication network pass through the first The two groups of transmission nodes respectively transmit to the base stations corresponding to the respective communication network...

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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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