Satellite-air-ground coordinated IoT (Internet of Things) communication method and device

Abstract

The invention provides a satellite-air-ground coordinated IoT communication method and device. The method comprises that in one operation period of a dynamic relay, an optimization problem model is constructed based on obtained spatial position information of each IoT terminal, spatial position information of the dynamic relay and operation parameters of the dynamic relay; and an optimal solutionof the optimization problem model is calculated, and communication between each IoT terminal and the dynamic relay is realized according to the optimal solution. According to the method and device, the optimization problem model is constructed, the optimal solution of the optimization problem model is calculated, the emission power of each IoT terminal, the operation height of the dynamic relay and scheduling information of each IoT terminal in each time slot are obtained, communication between each IoT terminal and the dynamic relay is realized, the throughput of the IoT terminals is improved, communication time delay and cost of the network are reduced, and the network operation cost is reduced.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of Internet of Things communication, and in particular, to a communication method and device for the collaborative Internet of Things between space and ground. Background technique [0002] The space-ground collaborative IoT communication system refers to the IoT communication system composed of satellites, dynamic relays, and IoT terminals. Among them, the dynamic relay is in the air, and its spatial position and trajectory will affect the communication system of the space-ground collaborative IoT communication system. Communication efficiency has a major impact. [0003] In the prior art, the space-ground collaborative IoT communication system still faces many important challenges, especially the space-ground collaborative IoT communication system using UAVs as dynamic relays. On the one hand, some IoT terminals (such as umbrellas, books, etc.) , watches, etc.) Due to their own s...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the space-ground collaborative IoT communication system still faces many important challenges, especially the space-ground collaborative IoT communication system using UAVs as dynamic relays. On the one hand, some IoT terminals (such as umbrellas, books, etc.) , watches, etc.) Due to their own size limitations, their energy is also limited. Therefore, how to ensure the minimum energy consumption when IoT terminals transmit data to dynamic relays is an important challenge

On the other hand, due to the high mobility of UAVs, how to design the flying height of UAVs in space to optimize the communication link between UAVs and IoT terminals, so as to ensure that The rate of human-machine transmission is the highest, reducing the communication delay and overhead of the network, and reducing the cost of network operation are also important challenges

In remote areas, due to the lack of network blind spots, it is difficult to monitor and manage the random flying of drones; although the existing radar system can monitor the location of drones and other information well, it is expensive and difficult to apply Civilian use, therefore, how to control the dynamic information of drones is also extremely important

The most important thing is that due to the fixed operating height of the UAV in the existing technology, it cannot maximize the communication service requirements of the IoT terminal, the throughput of the IoT terminal is low, and the communication delay and overhead of the network are relatively large.

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