Time synchronization keeping method and system applied to TD-LTE

A technology for time synchronization and system retention, applied in time division multiplexing systems, synchronization devices, multiplexing communications, etc. Avoid time synchronization jumps, avoid hardware revisions, and meet performance requirements

Active Publication Date: 2018-08-31
WUHAN HONGXIN TECH DEV CO LTD
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Problems solved by technology

However, this method directly affects the link, which may affect the link processing and affect the normal transmission and reception of the service channel. On the other hand, it is not easy to adjust the threshold accurately. If the threshold setting i

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  • Time synchronization keeping method and system applied to TD-LTE
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  • Time synchronization keeping method and system applied to TD-LTE

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Embodiment Construction

[0028] 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 and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0029] The present invention provides a time synchronization maintenance method applied in the TD-LTE system. The main idea is that the base station obtains the time synchronization signal, and uses a counter generated by a local clock to count and count the time period of the synchronization signal. The ratio of the number of points to the standard number of points, configure the reference timer, and finally achieve the purpose of time synchronization correction by adjusting the reference timer in real time. The invention does not directly adjust the wireless frame header, but acts on the referenc...

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Abstract

The invention provides a time synchronization keeping method and a time synchronization keeping system applied to a TD-LTE. The method comprises the steps as follows: a base station acquires a time synchronization signal, the time cycle of the synchronization signal is counted by using a counter generated by a local clock, a reference timer acting in base band treatment is configured according toa ratio of the actual counted point number in the time cycle and the standard point number, and the reference timer is adjusted in real time to achieve time synchronization correction. According to the method and system provided by the invention, the increasing of cost caused by hardware revision can be avoided, the time synchronization hopping caused the common correction mode is avoided, and theperformance requirement of time synchronization keeping is also met. In addition, the scheme has no affect on the treatment of system base band, low in complexity and prone to implementation, and thenew technical means for overcoming the prejudice of the prior art is provided in the industry, and the important market value is provided.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method and system for maintaining time synchronization for TD-LTE. Background technique [0002] The LTE (Long Term Evolution, long-term evolution) system has two modes, namely, FDD (Frequency Division Duplexing, frequency division duplexing) and TDD (Time Division Duplexing, time division duplexing). Generally, LTEFDD and TD-LTE are used to represent two different modes. system mode. TD-LTE uses time to distinguish receiving and sending channels, and receiving and sending use different time slots of the same frequency carrier as the bearer of the channel. In a certain time period, the base station sends signals to the terminal, and in other time periods, the terminal sends signals to the base station. Therefore, in TD-LTE networking, each base station must maintain strict time synchronization to ensure that the uplink and downlink between each base station will not inte...

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Application Information

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IPC IPC(8): H04J3/06H04W56/00
CPCH04J3/0638H04J3/0667H04W56/001
Inventor 李辉倪霞余刚邓风
Owner WUHAN HONGXIN TECH DEV CO LTD
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