A time synchronization maintenance method and system for TD-LTE

A time synchronization and system maintenance technology, applied in time division multiplexing system, synchronization device, multiplexing communication, etc., can solve problems such as link processing influence, frequent adjustment, multi-station positive and negative error accumulation, etc., to achieve Avoid time synchronization jumps, avoid hardware revisions, and meet performance requirements

Active Publication Date: 2021-05-18
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 is too small, it will lead to frequent adjustments and affect normal business processing. If the threshold is set too large, it may lead to the accumulation of positive and negative errors of multiple stations, which will affect the synchronization effect

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  • A time synchronization maintenance method and system for TD-LTE
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  • A time synchronization maintenance method and system for TD-LTE

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[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 present invention provides a time synchronization maintenance method and system for TD-LTE. The base station obtains the time synchronization signal, and counts and counts the time period of the synchronization signal with a counter generated by a local clock. According to the actual counting points and standard in the time period The ratio of the number of points configures the reference timer used in the baseband processing, and achieves time synchronization correction by adjusting the reference timer in real time. The invention can avoid the cost increase of the hardware revision, not only avoids the time synchronization jump caused by the common correction method, but also satisfies the performance requirement of the time synchronization maintenance. In addition, the solution has no impact on system baseband processing, has low complexity, is easy to implement, and provides a new technical means to overcome the bias of existing technologies in the industry, and has important market value.

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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Patent Type & Authority Patents(China)
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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