Low-delay and low-power-consumption downlink communication mechanism based on Lora

Abstract

The invention discloses a low-delay and low-power-consumption downlink communication mechanism based on Lora. The low-delay and low-power-consumption downlink communication mechanism comprises the following steps: S1, a Lora gateway issues a beacon frame through a service channel; Lora nodes which access the network receive beacon frames at regular time for synchronization; S2, the Lora nodes acquires information such as network beacon time, an address number under an allocated channel, a packet number, a channel radio frequency parameter and the like through the network access interaction information; and S3, calculating downlink interception reference time and an interception period according to the information obtained in the S2. The Lora chip is in the dormant state in other time periods except CAD interception and time sequence reception time periods, and an MCU is allowed to be dormant; if no other service needs to be executed, the MCU can enter a low-power-consumption mode, andtherefore power consumption of a communication module group is reduced to a great extent.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a Lora-based downlink communication mechanism with low delay and low power consumption. Background technique [0002] The Internet of Things provides a new dimension of communication for people in the field of information and communication technology. Low power consumption, wide coverage, large capacity, and low cost are the development directions of IoT technology. At the same time, intelligent IoT systems must also have elements such as perception, decision-making, and execution. [0003] Lora is a long-distance wireless communication technology that realizes ultra-long-distance wireless communication under low power consumption conditions. LoraWan is a low-power wide-area network communication protocol specification based on Lora technology launched by the Lora Alliance. The protocol divides terminals into three types: CLASS A, CLASS B, and CLASS C. Among t...

AI Technical Summary

Problems solved by technology

Among them, CLASS A terminals have the lowest power consumption, but they can only support downlink and uplink transmission, and cannot support active downlink communication. CLASS B and CLASS C support active downlink, but greatly increase the power consumption of the terminal, which cannot meet low-power applications. scene

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