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A lora wireless network and its parameter optimization, transmission method and device

A network parameter and wireless network technology, applied in the field of data transmission, can solve the problems of maintaining energy consumption node network parameters, upgrading, and inability to obtain data throughput, so as to increase effective data throughput, improve accuracy, and minimize energy consumption. consumption effect

Active Publication Date: 2021-08-24
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The object of the present invention is to provide a Lora wireless network and its parameter optimization, transmission method and device, in order to solve the problem that the optimization method of the prior art cannot obtain the node network parameters that can not only ensure the improvement of data throughput but also maintain energy consumption, thus causing The problem of low transmission efficiency of Lora wireless network

Method used

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  • A lora wireless network and its parameter optimization, transmission method and device
  • A lora wireless network and its parameter optimization, transmission method and device
  • A lora wireless network and its parameter optimization, transmission method and device

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Embodiment 1

[0090] In this embodiment, a Lora wireless network parameter optimization method is provided, which is used to optimize the network parameters of any type of node in the Lora wireless network, wherein the SF value of the same type of node is the same, for the SF value of s in which The same type of nodes, s∈[7,12], network parameters include fixed parameters and parameters to be optimized.

[0091] like figure 2 As shown, the method follows the steps below:

[0092] Step A. Obtain the fixed parameters of the nodes to be optimized. The fixed parameters include the number of nodes, the duty cycle of nodes, the length of data packets, and the first receiving window RX 1 delay;

[0093] In this embodiment, the number of nodes is 8, the node duty cycle is 0.5, the data packet length is 43ms, and the first receiving window RX 1 The delay time is 1000ms, so the fixed parameters are [8, 0.5, 43, 1000].

[0094] Step B, starting from the initial value of the size of the parameter ...

Embodiment 2

[0195] In this embodiment, a Lora wireless network data transmission method is disclosed. The optimized Lora wireless network is used for data transmission. The optimized Lora wireless network adopts the Lora wireless network parameter optimization method of Embodiment 1 to optimize the SF in the current Lora wireless network. Nodes with the same value are obtained after optimization.

[0196] In this embodiment, the quality of concurrent transmission depends on the downlink transmission PRR, which is affected by whether the node can receive the downlink transmission in the RX window, when the receiving window size (ie t a ) is larger, the downlink PRR is also higher. Due to the limitation of energy consumption and the activation time according to the duty cycle, t a Can not be infinitely large, in this embodiment, a suitable t that satisfies the constraints and can obtain the best throughput will be selected a . t a has a maximum length of and at this time t 2 becomes ...

Embodiment 3

[0203] In this embodiment, a Lora wireless network parameter optimization device is provided, which is used to obtain the optimized network parameters of any type of node in the Lora wireless network, wherein the SF value of the same type of node is the same, and for wherein the SF value is s The same type of nodes, s∈[7,12], the network parameters include fixed parameters and parameters to be optimized, and the device includes a fixed parameter acquisition module, a parameter determination module to be optimized, a network parameter combination module, an energy consumption screening module, and a theoretical packet receiving rate An acquisition module, a packet reception rate regression module and a parameter selection module;

[0204] The fixed parameter acquisition module is used to obtain the fixed parameters of the nodes to be optimized. The fixed parameters include the number of nodes, the duty cycle of nodes, the length of data packets, and the first receiving window RX...

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Abstract

The invention discloses a LoRa wireless network and its parameter optimization, transmission method and device. The effective throughput of LoRa parallel transmission is improved by controlling the size of the receiving window. The method provided by the invention does not require frequent exchange of control information and introduces a new A concurrent transmission model is used to estimate the downlink PRR when the network parameters are different in LoRa, and a regression model is used to make the results more realistic. Then, the present invention proposes a simple optimization algorithm to select the optimal receiving window size that the node can receive confirmation; the experimental results show that in the LoRa concurrent transmission where 48 nodes work with a 20% duty cycle, the present invention The provided data transfer method can increase the effective throughput by 70% and reduce the energy consumption by 30%.

Description

technical field [0001] The present invention relates to a data transmission method, in particular to a Lora wireless network and its parameter optimization, transmission method and device. Background technique [0002] Low-power wide-area network has always played a key role in the Internet of Things. Lora has the characteristics of long-distance, low power consumption and supporting concurrent transmission. The use of concurrency mechanism can significantly improve the throughput of Lora wireless network. However, according to the LoRa concurrent transmission In actual experiments, most of the increased throughput is not effective throughput, but retransmitted packets. Frequent retransmission of data packets not only wastes bandwidth, but also causes more energy consumption. Continuous uplink concurrent transmission may block downlink transmission, and failure of downlink transmission will lead to retransmission, ultimately reducing effective throughput. [0003] like fig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18H04W28/18H04W52/02
CPCH04L1/1829H04L1/1832H04W28/18H04W52/0209Y02D30/70
Inventor 徐丹张楠楠丁娜娜张晶刘宝英陈晓江房鼎益
Owner NORTHWEST UNIV
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