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

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.

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...

AI Technical Summary

Problems solved by technology

[0004] At present, there is no definite frame structure for broadband wireless micropower power meter reading. Other IoT systems, such as Lora Internet of Things, and narrowband power line meter reading systems use modulation methods, transmission data volume, data organization methods, and channel codecs. Different, so the frame structure is not suitable for broadband wireless micropower electric meter reading system

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