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Clock synchronization method and base station

A technology for clock synchronization and clock synchronization information, which is applied in the field of communication and can solve problems such as low synchronization accuracy, large clock jitter, and difficulty in receiving GPS signals.

Active Publication Date: 2010-03-10
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the inventor found that the defects of the prior art in the process of realizing the present invention are: when using the GPS synchronization method, each base station must be equipped with a GPS receiver, the cost is relatively high, and it is difficult to install the miniaturized base station indoors. Receive GPS signals, so it is impossible to provide GPS synchronization conveniently; when using IP clock synchronization, because the delay and jitter of the IP transmission network are relatively large, the synchronization accuracy is low, and the clock jitter is large, especially difficult to meet the time division duplex ( TDD: Time Division Duplex) mobile communication system requirements

Method used

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  • Clock synchronization method and base station

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Experimental program
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Embodiment 1

[0030] An embodiment of the present invention provides a clock synchronization method, such as figure 1 As shown, the method includes:

[0031] Step 101, the base station obtains the clock synchronization information of the neighboring base station, and the clock synchronization information includes the synchronization state identification of the neighboring base station;

[0032] Step 102, the base station determines the synchronized adjacent base station according to the synchronization status identifier of the adjacent base station;

[0033] Step 103, the base station selects an adjacent base station as a clock reference from among the synchronized adjacent base stations;

[0034] Step 104, the base station performs clock synchronization according to the synchronization parameter of the neighboring base station as the clock reference.

[0035] In this embodiment, the base station may be an unsynchronized base station, and adjacent base stations may be base stations around...

Embodiment 2

[0047] An embodiment of the present invention provides a clock synchronization method, such as figure 2 As shown, the method includes:

[0048] In step 201, the base station obtains clock synchronization information of neighboring base stations. The clock synchronization information includes the synchronization status identifier of the neighboring base station, and also includes the clock synchronization level corresponding to the synchronization status identifier.

[0049] In step 202, the base station determines a synchronized neighboring base station according to the synchronization status identifier of the neighboring base station.

[0050] Step 203, the base station selects an adjacent base station as a clock reference from among the synchronized adjacent base stations;

[0051] Among them, the adjacent base station as the clock reference can be selected according to the clock synchronization level;

[0052]In this embodiment, the clock synchronization level may be use...

Embodiment 3

[0098] An embodiment of the present invention provides a base station, such as Figure 6 As shown, the base station includes an information acquisition unit 601, a synchronization determination unit 602, a selection unit 603, and a clock synchronization unit 604; wherein, the information acquisition unit 601 is used to acquire clock synchronization information of neighboring base stations, and the clock synchronization information includes neighboring The clock synchronization state identification of the base station; the synchronization determination unit 602, which is used to determine the synchronized adjacent base station according to the clock synchronization state identification of the adjacent base station obtained by the information acquisition unit 601; Select the adjacent base station as the clock reference in ;

[0099] The clock synchronization unit 604 is configured to perform clock synchronization according to the synchronization parameter of the neighboring base...

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Abstract

The embodiment of the invention provides a clock synchronization method and a base station; the method comprises the following steps: the base station obtains clock synchronization information of theadjacent base station, the clock synchronization information comprises a synchronous state identification of the adjacent base station; the base station determines the synchronized adjacent base station according to the synchronous state identification of the adjacent base station; the base station chooses the adjacent base station used as a clock reference in the synchronized adjacent base stations; the base station carries out clock synchronization according to synchronization parameters of the adjacent base station used as the clock standard. By adopting the embodiment of the invention, thesynchronization parameters of the synchronized adjacent base stations can be used as a synchronization reference to carry out clock synchronization without allocating with a GPS receiver, the cost issaved and the reliability and the performance of the synchronization can be improved.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a clock synchronization method and a base station. Background technique [0002] In the WIMAX: Worldwide Interoperability for MicrowaveAccess (WIMAX: Worldwide Interoperability for MicrowaveAccess) communication system, in order to avoid interference between base stations and facilitate smooth access of mobile terminals, the frequency and time between multiple base stations need to be synchronized to meet certain accuracy requirements . [0003] At present, base station synchronization mostly adopts a global positioning system (GPS: Global Positioning System) synchronization method, and each base station in a mobile communication system uses GPS as a clock reference, so that clock synchronization between base stations can be realized. In addition, an Internet Protocol (IP: Internet Protocol) clock synchronization method may also be used, and each base station is sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W56/00H04W88/08H04B7/26
Inventor 文长春
Owner HUAWEI TECH CO LTD
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