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Method and base station for realizing time synchronization

A time synchronization and time technology, applied in the field of communication, can solve the problems of electromagnetic environment interference, affecting the absolute system time reliability of the base station, and the absolute time reliability is not high, so as to achieve the effect of improving reliability

Active Publication Date: 2011-04-06
HUAWEI TECH CO LTD
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Problems solved by technology

[0005] In the process of obtaining the absolute time at the base station, the inventors found that there are at least the following problems in the prior art: For method one, since the GPS star card has certain requirements for the installation location and is susceptible to interference from the electromagnetic environment, the base station follows this method. The reliability of the absolute time obtained by the first method is not high; for the second method, the equipment in the mobile communication network needs to support the IEEE 1588V2 protocol, but the routers and switches in the current mobile communication network usually do not support the IEEE 1588V2 protocol, so that It is difficult for the base station to obtain the absolute time, which also affects the reliability of the base station to obtain the absolute system time

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  • Method and base station for realizing time synchronization

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Embodiment Construction

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0028] We take the WiMAX (Worldwide Interoperability for Microwave Access) mobile communication system as an example for description.

[0029] Such as figure 1 As shown, Embodiment 1 of the present invention provides a method for realizing time synchronization, including:

[0030] Step 11, the base station to be synchronized acquires the information of the clock source base station.

[0031] In the embodiment of the present invention, the base station to be ...

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Abstract

The embodiment of the invention discloses a method and a base station for realizing time synchronization, relates to the technical field of communication, and aims to improve the reliability of acquiring the absolute system time by the base station. The method comprises the following steps of: acquiring information of a clock source base station; performing downlink synchronization according to the information of the clock source base station and the clock source base station; acquiring a reference parameter of the absolute system time; and calculating the absolute system time according to the reference parameter of the absolute system time and performing system time synchronization by using the absolute system time and the clock source base station.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method for realizing time synchronization and a base station. Background technique [0002] In order to realize the time division multiplexing of transmission resources, the mobile communication network requires transmission synchronization between network elements. Therefore, each network element has strict requirements on the accuracy of clock signals. At present, the base station generally obtains the absolute time through two methods. [0003] Method 1: The base station obtains the absolute time from the satellite through a satellite card of a synchronous satellite, such as a GPS (Global Positioning System, Global Positioning System) card. [0004] Method 2: The base station acquires the absolute time through a clock server that supports the IEEE 1588V2 (The Institute of Electrical and Electronics Engineers 1588Version2, precision clock synchronization standard vers...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W56/00H04W88/08H04L7/00
CPCH04W56/001
Inventor 宋照红张大刚
Owner HUAWEI TECH CO LTD