LoRaWAN channel conflict avoidance method based on time division multiple access

A technology of channel conflict and time-division multiple access, applied in the field of LoRaWAN channel conflict avoidance based on time-division multiple access, can solve the problem of low channel utilization, achieve the effect of reducing data conflict and improving channel utilization

Active Publication Date: 2019-09-24
ZHEJIANG SCI-TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Each terminal node of the standard LoRaWAN protocol uses pure ALOHA to send data, and the channel utilization is very low

Method used

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  • LoRaWAN channel conflict avoidance method based on time division multiple access
  • LoRaWAN channel conflict avoidance method based on time division multiple access
  • LoRaWAN channel conflict avoidance method based on time division multiple access

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Embodiment Construction

[0032] In order to make the above and other objects, features and advantages of the present invention more apparent, further detailed description will be given below.

[0033] The LoRaWAN network system includes LoRa nodes, LoRa gateways, LoRa bridges, LoRa network servers, LoRa application servers, and LoRa TDMA servers (as attached figure 1 ).

[0034] Over-the-air activation (OTAA) refers to sending a network access request packet to the LoRa server before the LoRa node enters the network. The payload of this network access request packet consists of three parts: DevEUI (device unique identifier), AppEUI (application unique identifier, this field is no longer emphasized in the latest LoRaWAN protocol), DevNonce (random number). If the LoRa server allows the node to enter the network, it will reply to the network to accept the data packet, otherwise it will not reply. The load part of the data packet received by the network is composed of 6 parts: AppNonce (application ran...

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Abstract

The invention discloses a LoRaWAN channel conflict avoidance method based on time division multiple access. The method comprises the following steps: an LoRa node sending a network access request data packet with a sending period of the LoRa node; the LoRa TDMA server sending a network access receiving data packet with a LoRa node multicast address and a multicast address serial number, when a sending period of the LoRa node arrives, a corresponding bit being set in an issued multicast data load, and after the LoRa node receives multicast data, judging whether uplink data are sent or not. When higher channel utilization rate is required in some application scenarios, the LoRaWAN time division multiple access mechanism realized by multicast can greatly improve the channel utilization rate.

Description

technical field [0001] The present invention relates to the technical field of LoRaWAN, one of wide-area Internet of Things technologies, and in particular to a LoRaWAN channel conflict avoidance method based on time division multiple access. Background technique [0002] Low-power wide-area network (LPWAN) is a wireless communication wide-area network with low data rate and long communication distance. more advantageous. The standard LoRaWAN network system has many limitations. According to actual application requirements, some application scenarios require higher channel utilization. Each terminal node of the standard LoRaWAN protocol uses pure ALOHA to send data, and the channel utilization rate is very low. Time division multiple access technology can improve the channel utilization of LoRaWAN network. Contents of the invention [0003] The object of the present invention is to provide a LoRaWAN channel conflict avoidance method based on time division multiple acces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08
CPCH04W74/085Y02D30/70
Inventor 徐伟强陈孝松朱宏升毛续飞
Owner ZHEJIANG SCI-TECH UNIV
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