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Data transmission method and system in Internet of Things

A data transmission method and technology of the Internet of Things, applied to the data transmission method and system field in the Internet of Things, to achieve the effect of overcoming the problem of transmission reliability and improving reliability and efficiency

Active Publication Date: 2020-11-27
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 data transmission method and system in the Internet of Things to solve the problem of reliability of data transmission in the existing Internet of Things using narrow bandwidth, and improve the reliability and efficiency of data channel transmission

Method used

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  • Data transmission method and system in Internet of Things
  • Data transmission method and system in Internet of Things
  • Data transmission method and system in Internet of Things

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] 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. Fail, F1+F2=F, F1 is an integer greater than or equal to 1, 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.

[0062] The base station divides the physical layer data bit sequence of length S into a first bit sequence of length S1 and a second bit sequence of length S2, wherein the sum of S1 an...

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) 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 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 subcarrier of the second bit sequence length to combat the effects of channel degradation.

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PUM

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Abstract

The invention discloses a data transmission method and system in the Internet of Things. The method comprises the steps of: enabling a first communication node to receive F pieces of feedback information sent by a second communication node; dividing the physical layer data bit sequence into a first bit sequence and a second bit sequence; modulating the first bit sequence and the second bit sequence; uniformly extracting M1 subcarriers from M1+M2 subcarriers with continuous time frequency, mapping M1 modulation symbols to the M1 subcarriers, and mapping M2 modulation symbols to the remaining M2subcarriers; carrying a demodulation reference signal on a sub-carrier on a time domain symbol before the time region where the MI+M2 sub-carrier is located, and repeatedly sending a physical layer transmission unit block to a second communication node on the time domain; and enabling the second communication node to perform demodulation decoding operation and send feedback reception success or reception failure information to the first communication node according to a decoding result. According to the invention, the reliability and efficiency of data channel transmission are improved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a data transmission method and system in 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 " Internet of E...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L5/00H04W28/02H04W28/04H04W52/26
CPCH04L1/0003H04L1/0007H04L1/0061H04L5/0048H04L5/0064H04W28/0263H04W28/04H04W52/262
Inventor 王洋
Owner SHENZHEN POLYTECHNIC