A method and system for joint optimization of multi-UAV trajectory and intelligent reflector phase shift

Abstract

The invention discloses a method and system for joint optimization of multi-UAV trajectories and intelligent reflective surface phase shift. A wireless communication system model based on multi-UAV and intelligent reflective surface assistance is established. The smart reflector reflects to the base station, determines the channel model in the wireless communication system model and the energy consumption model of the UAV and the smart reflector, and calculates the energy efficiency of the wireless communication system model; uses the K-means clustering algorithm to cluster ground users , using the priority experience playback MATD3 method to determine the position of the UAV in each cluster, the user who communicates with the base station is assisted by the UAV and the smart reflective surface, the activated reflective element of the smart reflective surface and the phase of the activated reflective element to complete the joint optimization of the multi-UAV trajectory and the phase shift of the smart reflector. The invention solves the problems of high communication delay and high power consumption of the existing offline optimization method.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a joint optimization method and system for multi-UAV trajectories and intelligent reflection surface phase shifts. Background technique [0002] With the development of the Internet of Things technology, more and more devices need to be connected to the communication network, and sometimes these devices are distributed in a very large area. If only a single drone and a single smart reflector are used for a large number of communication The provision of services by the equipment will undoubtedly bring a large communication load to the UAV. In addition, the long-distance flight of the UAV will consume a lot of time and energy, which will cause serious communication delays, which is also a problem for the UAV. power consumption issues pose challenges. [0003] In order to improve low-latency and high-reliability services for user equipment, multiple UAVs ...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a joint optimization method and system for multi-UAV trajectory and intelligent reflective surface phase shift in order to solve the problem of existing UAV trajectory and intelligent reflective surface phase shift. Offline optimization method high communication delay, high power consumption problem

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