Fast and continuous data frame transmission method based on LoRa

Abstract

The invention provides a fast and continuous data frame transmission method based on LoRa for mainly solving the problems of the existing continuous data frame transmission method based on LoRa that the time consumption is relatively large and that the control cost is relatively high. The implementation scheme is as follows: by fully utilizing a header reservation bit of a data frame, a node can continuously send up to 8 data frames requiring acknowledgment and an unlimited number of data frames requiring no acknowledgment at a time, and can use an adaptive variable-length acknowledgment frameto reply the up to 8 data frames requiring acknowledgment, thereby not only accelerating the transmission of the data frames, shortening the delay of the data frames, but also reducing the number ofacknowledgment frames on the whole and reducing the control cost; and the fast and continuous data frame transmission method can be applied to wireless communication systems or networks using the LoRatechnology.

Description

technical field [0001] The present invention belongs to the technical field of using Low-Power Wide-Area Internet of Things (Low-Power Wide-Area Internet of Things) technology and ultra-long-distance ultra-low power consumption data transmission (Long Range, referred to as LoRa), especially relates to the network MAC layer The wireless wide-area Internet of Things that adopts the LoRaWAN access method. Background technique [0002] With the development of IoT, more and more viable applications are appearing in industry. Currently widely used short-range wireless connection technologies (such as Bluetooth and ZigBee) are not very suitable for many low-bandwidth long-distance application scenarios. M2M solutions based on cellular technology provide long-distance communication at the cost of power consumption, but this solution is not conducive to environmental protection, other 3GPP-based (such as GSM / GPRS, 3G / 4G / 5G) solutions have the same defects . IoT technology provides...

AI Technical Summary

Problems solved by technology

[0017] (1) Regardless of the continuous transmission of uplink or downlink data frames, the data frame sending node needs to wait for a period of time before sending the next data frame after sending a data frame; moreover, when the downlink data frames are continuously transmitted, the gateway needs to receive The next data frame can only be sent after the uplink frame sent by the terminal; this method not only increases the delay of the data frame, but also increases the control overhead

[0018] (2) In terms of replying confirmation information after receiving a data frame, for uplink or downlink data frames, existing related methods reply confirmation information for each frame separately, and each reply operation can only confirm that one data frame is received successfully. When it is possible to confirm the successful reception of multiple data frames with one reply, it will show a certain amount of redundant control overhead and data frame delay

[0019] The above problems will lead to large data frame delay and control overhead, which is not conducive to the improvement of MAC layer data transmission performance, so it needs to be solved

Images