Uplink data timing synchronization method and device for high-speed rail system

A technology of timing synchronization and data, which is applied in the direction of synchronization device, time division multiplexing system, multiplexing communication, etc., can solve the problems of out-of-synchronization of received data and performance degradation during switching, so as to solve the problem of performance degradation and improve user The effect of experience

Inactive Publication Date: 2017-06-09
POTEVIO INFORMATION TECH
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Problems solved by technology

[0004] One of the objectives of the present invention is to provide a method and device for timing synchronization of uplink data in a high-speed rail system, so as to solve the problem in the prior art that two different RRUs receive data out of synchronization or when the UE switches between different RRUs in the same BBU Technical Issues with Slow Performance

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  • Uplink data timing synchronization method and device for high-speed rail system
  • Uplink data timing synchronization method and device for high-speed rail system
  • Uplink data timing synchronization method and device for high-speed rail system

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[0041] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0042] In the first aspect, the embodiment of the present invention provides a method for timing synchronization of uplink data in a high-speed rail system, such as figure 1 shown, including:

[0043] Select effective RRUs from multiple remote radio unit RRUs; and obtain the average value E of peak delays of all effective RRUs;

[0044] Acquiring the timing advance TA of the user terminal UE according to the above-mentioned average value E of the peak delay, and providing the TA value to the UE to adjust the data transmission time of the UE;

[0045] Obtain the difference Dt between the peak delay of each effective RRU and the average value E of the above peak; assign th...

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Abstract

The invention relates to an uplink data timing synchronization method and device for a high-speed rail system. The method comprises steps that effective RRU are selected from multiple radio frequency remote units RRU; an average value E of peak value time delay of the all effective RRU is acquired; a time initial lead TA of a user terminal UE is acquired according to the average value E of the peak value time delay, and the TA value is further provided for the UE to adjust the data sending time of the UE; a difference value Dt of the peak value time delay of each effective RRU and the average value E is calculated; a peak value difference value D is endowed to the value of the difference value Dt; uplink data of the UE is acquired, the extraction data position is adjusted according to the peak value difference value D to realize synchronous data extraction; the data received by the all effective RRU is merged. The device is used for realizing the uplink data timing synchronization method. The method is advantaged in that influence of the peak value difference value D can be eliminated during data extraction of the effective RRU when the data extraction position is adjusted, and user experience is improved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and device for timing synchronization of uplink data used in high-speed rail systems. Background technique [0002] In practical applications, for example, the communication system of the high-speed rail system needs to use distributed antennas to expand the range of the cell, so as to solve the problem of frequent switching. In the prior art, distributed antennas usually use a network structure of an indoor baseband processing unit (Building Base band Unit, BBU) and a radio remote unit (Radio Remote Unit, RRU) to realize multi-cell combination, that is, one BBU combines multiple RRUs The coverage of a single cell can be extended. [0003] In the cell implemented by the above network structure, the distances from the user equipment UE to multiple RRUs are different, resulting in different uplink delays. The base station can only send one timing a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W56/00H04J3/06
CPCH04J3/0638H04W56/001
Inventor 于小红
Owner POTEVIO INFORMATION TECH
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