Frame structure applied to Chirp modulation mode in Internet of Things system

A technology of the Internet of Things system and modulation method, which is applied in the field of frame structure, and can solve the problems of data organization and channel coding and decoding, which are different and inapplicable

CN110944022AActive Publication Date: 2020-03-31重庆源联信息科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-03-31

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Abstract

The invention requests to protect a frame structure applied to a Chirp modulation mode in an Internet of Things system. The method is applied to a broadband wireless micropower electric power meter reading system. The structure comprises a preamble part, a frame control part, a frame interval part and a load data part, wherein the whole frame structure adopts the same carrier frequency and the same wireless bandwidth for transmission, the leading part and the frame control part adopt a fixed modulation rate for transmission, the modulation rate selects the lowest modulation rate which can be supported by load data, and the load data part performs dynamic adjustment and conversion according to the modulation rate in frame control, wherein the preamble part is used for monitoring and searching frames by a receiving end, wherein the frame control part is used for indicating analysis parameters used by the load data part, the frame interval part is used for receiving radio frequency adjustment time of the load data part after the receiving end receives the modulation rate, and the load data part is used for bearing protocol signaling and service data in a high layer.
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Description

technical field

[0001] The invention belongs to the field of communication systems in the Internet of Things, and proposes a frame structure applied to a Chirp modulation mode in the Internet of Things system. Background technique

[0002] The diversification of IoT application scenarios and application fields has led to the diversification of communication requirements. No IoT communication mode can cover all communication needs. Even at the current stage of commercial 5G communication, various communication modes are required. . In the IoT wireless communication system, usually only shared frequency bands can be used, that is, different IoT systems compete to use these frequency bands, resulting in serious wireless interference in these frequency bands and a large channel noise floor. Therefore, Chirp spread spectrum communication is widely used in the IoT It has been promoted and used in communication, and the most typical one is the LoRaWAN system. However, the LoRaWAN...

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Embodiment Construction

[0027] The technical solutions in the embodiments of the present invention will be described clearly and in detail below with reference to the drawings in the embodiments of the present invention. The described embodiments are only some of the embodiments of the invention.

[0028] The technical scheme that the present invention solves the problems of the technologies described above is:

[0029] The present invention proposes a frame structure of a broadband wireless micropower electric meter reading system using Chirp modulation. The frame structure is composed of three parts, namely a leading part, a frame control part, a frame interval part and a load data part. The entire frame structure is transmitted using the same carrier frequency and the same wireless bandwidth. The preamble and frame control parts are transmitted using a fixed modulation rate. The modulation rate selects the lowest modulation rate that the payload data can support. The payload data block is based on...