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LoRa minimum PingSlot number prediction method

A prediction method and number technology, applied in digital transmission systems, data exchange networks, transmission systems, etc., can solve the problems of high energy consumption of LoRa terminals and waste of the number of PingSlots, so as to reduce contingency, ensure effectiveness, and avoid waste. Effect

Active Publication Date: 2019-04-12
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0005] In order to solve the problems of the waste of PingSlots in the prior art and the excessive energy consumption of LoRa terminals, the present invention proposes a method for predicting the minimum number of PingSlots in LoRa. Based on the ARIMA model, a server downlink data amount prediction framework is established, and the selected value is selected according to the predicted value. Appropriate number of PingSlots, taking into account the requirements of terminal downlink efficiency and energy consumption

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[0031] In order to facilitate those skilled in the art to understand the technical content of the present invention, the content of the present invention will be further explained below in conjunction with the accompanying drawings.

[0032] The method of the present invention is based on the ARIMA model. Once this model is identified, it can predict the future value through the past value and current value of the time series; therefore, the model can predict the future 128s (that is, a Beacon cycle) according to the historical downlink data. The amount of data, so as to select the appropriate number of PingSlots, and reduce the energy consumption of the terminal as much as possible.

[0033] Such as figure 1 Shown is the principle block diagram of the present invention, a kind of LoRa minimum PingSlot number prediction method of the present invention, based on the ARIMA model, obtains some downlink traffic prediction values ​​corresponding to the downlink data amount time ser...

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Abstract

The invention discloses a LoRa minimum PingSlot number prediction method and aims at the problem that in a Class B mode of a LoRaWAN standard, battery power is wasted due to the fact that too many PingSlots are opened. According to the method, a plurality of downlink data time sequences of a server are obtained, wherein downlink data volume within 128s is taken as a unit of the downlink data timesequences, and the sequences are enabled to be smooth and steady through d times of difference; and an optimum ARIMA (Autoregressive Integrated Moving Average Model) (p, d, q) model is established according to processed smooth and steady time sequences, and the server predicts the data volume within future 128s according to the established ARIMA (p, d, q) downlink time sequence model, so the suitable PingSlot number and compensation uplink number are accurately selected. Both downlink efficiency and an energy consumption requirement of a terminal are taken into consideration.

Description

technical field [0001] The invention belongs to the technical field of low-power wide area network communication, and in particular relates to a LoRaWAN minimum PingSlot number prediction technology. Background technique [0002] LoRaWAN is a LPWAN (Low Power Wide Area Network) technical specification, and its biggest feature is long-distance low power consumption. In order to ensure low power consumption to the greatest extent, the Class B device designed in the protocol, in addition to opening two short receiving windows for downlink communication after uplink transmission like Class A mode, also opens an additional receiving window (PingSlot) at a preset time for communication. Receive downlink data. The PingSlot mechanism improves the efficiency of downlink communication to a certain extent, but the existing PingSlot mechanism consumes too much power due to excessive numbers, which will cause excessive energy consumption of LoRa terminals and affect the battery life of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L12/26H04L29/08H04W24/06
CPCH04L41/145H04L41/147H04L43/08H04L67/12H04W24/06Y02D30/70
Inventor 杨鲲曾玉婷刘强张科梁萧
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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