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Robust IoT data transmission method and system

A data transmission method and technology of the Internet of Things are applied in the field of wireless communication to achieve the effect of overcoming the problem of transmission reliability and improving reliability and efficiency.

Active Publication Date: 2021-07-13
SHENZHEN POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a robust Internet of Things data transmission method and system to solve the problem of data transmission reliability in the existing narrow bandwidth Internet of Things and improve the reliability and efficiency of data channel transmission

Method used

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  • Robust IoT data transmission method and system
  • Robust IoT data transmission method and system
  • Robust IoT data transmission method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The base station receives F pieces of feedback information sent by the terminal, wherein, among the F pieces of feedback information, there are F1 pieces of feedback information indicating that the corresponding physical layer data bit sequence has been received successfully, and there are F2 pieces of feedback information indicating that the corresponding physical layer data bit sequence has been received successfully. Failed, F1+F2=F, F1 is an integer greater than or equal to 1, and F2 is an integer greater than or equal to 0. The purpose of doing this is that the base station can collect statistics on the link reliability information during the previous physical layer data transmission with the terminal, so as to provide guidance for subsequent physical layer data bit sequence transmission. If F2 / F1 is less than 0.2, the base station uses the same modulation method to obtain X1 symbols from the physical layer data bit sequence of length S, maps X1 symbols to X1 subcar...

Embodiment 2

[0071] On the basis of Embodiment 1, the physical layer data bit sequence includes a cyclic redundancy check bit sequence, and the terminal determines whether it has successfully received the physical layer data bit sequence based on whether the cyclic redundancy check bit sequence passes the check.

Embodiment 3

[0073] When (S1 / M1) is greater than or equal to 4, the value of alpha is 8; when (S1 / M1)

[0074] When it is less than 4, the value of alpha is 4. The advantage of this is that when the base station uses a relatively high modulation method to send data to the terminal, the channel condition is generally better, so it is necessary to reduce the length of the second bit sequence as much as possible to improve the spectral efficiency of useful data transmission, and at the same time take into account

[0075] The terminal obtains the benefit of channel information through the subcarrier used by the second bit sequence; however, when the base station uses a relatively low modulation method to send data to the terminal, the channel condition is generally poor, so it is necessary to appropriately increase the second bit sequence length to combat the effects of channel degradation. Example 4

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Abstract

The invention discloses a robust IoT data transmission method and system. The method includes that a first communication node receives F pieces of feedback information sent by a second communication node, and if F2 / F1 is greater than or equal to 0.2, or the first communication node receives Feedback information of failure to receive the physical layer data bit sequence to the second communication node, the first communication node divides the physical layer data bit sequence into first and second bit sequences; modulates the first and second bit sequences, from time-frequency continuous M1 subcarriers are uniformly extracted from M1+M2 subcarriers, M1 modulation symbols are mapped to M1 subcarriers, and M2 modulation symbols are mapped to the remaining M2 subcarriers; the second communication node receives the physical layer transmission unit block, And perform a demodulation and decoding operation, and send feedback success or failure information to the first communication node according to the decoding result. The invention improves the reliability and efficiency of data channel transmission.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a robust data transmission method and system for the Internet of Things. Background technique [0002] 5G will meet the diverse business needs of people in various areas such as living, working, leisure, and transportation, even in dense residential areas, offices, stadiums, open-air gatherings, subways, expressways, high-speed rails, and wide-area coverage. It can also provide users with extreme business experiences such as ultra-high-definition video, virtual reality, augmented reality, cloud desktop, and online games. At the same time, 5G will penetrate into the Internet of Things and various industries, and will be deeply integrated with industrial facilities, medical equipment, transportation, etc., to effectively meet the diversified business needs of vertical industries such as industry, medical care, and transportation, and realize the real " Inter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/04H04L1/00H04L5/00
CPCH04L1/0003H04L1/0007H04L1/0061H04L5/0048H04W28/04
Inventor 王洋
Owner SHENZHEN POLYTECHNIC