LoRaWAN network rate adaptive adjustment method based on conflict perception
An adaptive adjustment, network rate technology, applied in the direction of network traffic/resource management, advanced technology, electrical components, etc., can solve the problems of reducing network performance, increasing the transmission time of a single data packet, reducing the rate, etc., to avoid rate adjustment, The effect of improving data throughput and packet transmission reliability
Active Publication Date: 2021-06-25
CHONGQING UNIV OF POSTS & TELECOMM
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However, in the case of packet loss due to data conflicts, the original rate selection mechanism further reduces the rate, increases the transmission time of a single data packet, and further increases the probability of data collisions, which reduces network performance and fails to make the network reliable. Optimizing performance and throughput will limit the transmission efficiency of the LoRaWAN network
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[0048] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.
[0049] Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than physical drawings, and should...
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The invention relates to a LoRaWAN network rate adaptive adjustment method based on conflict perception, and belongs to the technical field of low-power wide area network wireless, and the method comprises the following steps: S1, N LoRa nodes and a plurality of LoRa gateways are randomly and uniformly distributed in a circular region, and in combination with the number of effective byte loads generated in the region, constructing a throughput estimation model, and obtaining a throughput index O; S2, constructing a path loss packet loss model according to a receiving sensitivity threshold value and path loss characteristics of the LoRa node, and initializing a spreading factor of each node to obtain a spreading factor initial test set SFinit; S3, establishing a conflict probability estimation model according to the transmission characteristics of the LoRa, and predicting the conflict probability Pmac under the current network condition; S4, establishing a rate adaptive adjustment mechanism based on conflict perception on the basis of the steps S2 and S3, and performing adaptive adjustment on the data rate of the terminal.
Description
technical field [0001] The invention belongs to the field of low-power wide-area network wireless technology, and relates to a method for adaptively adjusting LoRaWAN network speed based on conflict perception. Background technique [0002] LoRa low power consumption wide area network technology has the characteristics of low power consumption and long transmission distance. The LoRaWAN protocol supports a variety of rate options, and its communication distance is inversely proportional to the transmission rate, that is, the faster the rate selected, the shorter the distance for successful communication. At the same time, due to the adoption of the spread spectrum technology, since the spread spectrum factors used at different rates are mutually orthogonal, the data transmission between the data transmission rates will not conflict with each other. In addition, the low-speed characteristics of LoRa result in a high air propagation time (ToA), which makes LoRa transmission o...
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IPC IPC(8): H04W28/22
CPCH04W28/22Y02D30/70
Inventor 谢昊飞张量刘代雄张旺林吴禹霜
Owner CHONGQING UNIV OF POSTS & TELECOMM