Unmanned aerial vehicle track and signal transmitting power joint optimization method for wireless relay

Abstract

The invention discloses an unmanned aerial vehicle track and signal transmitting power joint optimization method for wireless relay. According to the method, a wireless network taking an unmanned aerial vehicle as a relay is considered; in the process that the unmanned aerial vehicle flies from a starting point to a terminal point, a signal sent by a source node is forwarded to a target node, andunder the conditions that the signal transmitting power of the unmanned aerial vehicle is limited, the flight time is limited, the information causal constraint and the link transmission rate constraint are limited, the total energy consumption of the unmanned aerial vehicle is optimized by adjusting the track and the signal transmitting power of the unmanned aerial vehicle. As the obtained problem is a non-convex optimization problem and is difficult to directly solve, the method provided by the invention uses a Successive Convex Approximation (SCA) method to convert and solve the problem. The method is suitable for areas with complex terrains, difficult deployment of ground base stations or poor communication quality, and the unmanned aerial vehicle is used as a mobile relay to provide services for user equipment.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to a wireless relay-oriented low-energy UAV track and signal transmission power joint optimization method. Background technique [0002] The current communication network is mainly composed of fixed communication equipment such as ground base stations or relays. Therefore, to achieve full coverage of the communication network, a large number of equipment deployments are required, which increases communication costs. Low-altitude UAV systems, due to their fully controllable nature, are more cost-effective in deploying and reconfiguring more quickly and flexibly. And because the possibility of UAV line-of-sight communication is higher, it has a better communication channel and can achieve a higher communication rate. In addition, in real life, some sudden natural disasters may cause serious damage to the ground communication infrastructure, resulting in the disaster-s...

AI Technical Summary

Problems solved by technology

Due to its limited energy resources, there is no suitable trajectory planning, which will not only cause a huge waste of resources, but also lead to unsatisfactory user needs

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