Communication method and system of Internet of Things

A communication method and communication system technology, which are applied in transmission systems, phase-modulated carrier systems, electrical components, etc., can solve problems such as high complexity, co-channel interference, and increased receiver complexity, and achieve a simple production process and increased complexity. degree of effect

Inactive Publication Date: 2020-02-18
黎光洁 +3
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Problems solved by technology

[0002] In the existing IoT communication system, when sending data downlink, different users in the same cell occupy different subcarriers to achieve multiple access, but users in adjacent cells may use the same frequency band for data transmission. Co-channel interference may occur between cells, reducing the reliability of data communication
In order to resist co-channel interference, the prior art uses QAM (Quadrature Amplitude Modulation, Quadrature Amplitude Modulation) coding for scrambling, but the complexity of QAM coding is high, which will increase the complexity of the receiver

Method used

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  • Communication method and system of Internet of Things
  • Communication method and system of Internet of Things

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Embodiment Construction

[0015] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0016] Any feature disclosed in this specification (including any appended claims, abstract), unless otherwise stated, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0017] refer to figure 1 , is a schematic flowchart of a communication method in the Internet of Things according to an embodiment of the present invention. In the embodiment of the present invention, the communication method of the Internet of Things is applied in the base station, and the base station is connected to the terminal device. The communication method includes:

[0018] Counting the number of symbols in the wireless frame and generating a random bit s...

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Abstract

The invention discloses a communication method and system of the Internet of Things, the communication method is applied to a base station, the base station is connected with a terminal device, the communication method comprises the following steps: counting the number of symbols of a radio frame and generating a random bit sequence, and the number of bits in the random bit sequence is the same asthe number of symbols of the radio frame; modulating each bit of the random bit sequence to generate a random phase to obtain a random phase sequence; multiplying each random phase in the random phase sequence by each symbol of the radio frame in sequence to obtain a scrambled radio frame, all sample points in the same symbol being multiplied by the same random phase; and communicating with the terminal equipment according to the scrambled radio frame. By implementing the method, the same-frequency interference can be resisted on the premise of not increasing the complexity of the receiver.

Description

technical field [0001] The invention relates to the technical field of Internet of Things communication, in particular to a communication method and system of the Internet of Things. Background technique [0002] In the existing IoT communication system, when sending data downlink, different users in the same cell occupy different subcarriers to achieve multiple access, but users in adjacent cells may use the same frequency band for data transmission. Co-channel interference may occur between cells, reducing the reliability of data communication. In order to resist co-channel interference, the prior art adopts QAM (Quadrature Amplitude Modulation, Quadrature Amplitude Modulation) coding for scrambling, but the complexity of QAM coding is relatively high, which will increase the complexity of the receiver. Contents of the invention [0003] The object of the present invention is to provide a communication method and system for the Internet of Things, which can resist co-ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/12H04L27/20
CPCH04B1/123H04L27/20
Inventor 黎光洁王明威李春宏吴冶
Owner 黎光洁
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