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A timing adjustment method and system based on 5G communication network

A timing adjustment and communication network technology, applied in wireless communication, synchronization devices, electrical components, etc., can solve problems such as increased information redundancy, information loss, and poor demodulation performance at the receiving end

Inactive Publication Date: 2020-07-07
INST OF AUTOMATION CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the case of large delay, the demodulation performance of the receiving end is very poor, which leads to the loss of information or increases the redundancy of information

Method used

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  • A timing adjustment method and system based on 5G communication network
  • A timing adjustment method and system based on 5G communication network
  • A timing adjustment method and system based on 5G communication network

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Embodiment Construction

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. 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.

[0037] Such as figure 1 As shown, a timing adjustment method based on a 5G communication network provided by an embodiment of the present invention includes:

[0038] S11. Receive the uplink signal sent by each user terminal, calculate the Doppler frequency shift and signal-to-noise ratio of the user terminal through the uplink signal, and r...

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Abstract

The invention relates to a real-time adjustment method and system based on a 5G communication network. The method includes the steps: determining user terminals that need to correct the transmission time as to-be-processed user terminals; obtaining the quality of a channel for transmitting an uplink signal through the Doppler frequency shift and a signal to noise ratio value; calculating the timing advance values of the corresponding to-be-processed user terminals according to the quality of the channel and the arrival time; and achieving the uplink synchronization of the to-be-processed userterminals through the corresponding timing advance values. According to the embodiment of the invention, the method determines the user terminals that need to correct the transmission time through receiving the arrival time of the uplink signal sent by each user terminal, and calculates the timing advance value of each user terminal by using the channel quality and the channel arrival time of eachuser terminal. Each user terminal that needs to correct the transmission time send an uplink signal according to the timing advance value, so as to implement uplink synchronization of the user terminals.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a timing adjustment method and system based on a 5G communication network. Background technique [0002] In wireless communication systems, timing adjustment is critical. An important feature of uplink transmission is that different clients perform time-frequency orthogonal multiple access, that is, uplink transmissions from different clients in the same cell do not interfere with each other. In order to ensure the orthogonality of uplink transmission and avoid intra-cell interference, the receiving end requires that signals from different clients in the same subframe but with different frequency domain resources arrive at the receiving end at the same time. As long as the receiving end receives the uplink data sent by the client within the range of the cyclic prefix, it can correctly decode the uplink data. Therefore, uplink synchronization requires that ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00
CPCH04W56/0005
Inventor 林啸
Owner INST OF AUTOMATION CHINESE ACAD OF SCI