基于Stackelberg博弈的无人机辅助无线供能物联网能量优化

doi:10.11959/j.issn.1000-436x.2022231

Abstract

Abstract:

The technology integrating unmanned aerial vehicles (UAV) with wireless power transfer is applied to provide energy supply for Internet of things devices.A Stackelberg game scheme was further proposed to tackle the problem on free and fair energy trading between a charging user and multiple UAV.The user played as a game leader and determined the rewards while each UAV played as a game follower, which competed for the rewards through the energy supply, and refered to the average channel gain during the wireless power transfer to determine the charging time for the user.The Stackelberg equilibrium solution was analyzed and derived by the backward induction method.Simulation results show that the proposed scheme can effectively reduce the economic cost for the user in the energy trading, thereby improving user satisfaction and achieving the user-side energy optimization.

Key words: UAV, wireless power transfer, Stackelberg game, user-side energy optimization

CLC Number:

TN925

Xumin HUANG, Yang ZHANG, Rong YU, Li JIANG, Hui TIAN, Yuan WU. Stackelberg game based energy optimization for unmanned aerial vehicle assisted wireless-powered Internet of things[J]. Journal on Communications, 2022, 43(12): 146-156.

Figures/Tables 10

参数	含义	参数	含义
∩	IoTD周边的所有无人机的集合	$η_{i}^{t}$	UAV i在空间中的WPT效率
$p_{i}^{LoS}$	UAV i 与IoTD建立LoS通信链路的概率	$ρ_{i}$	IoTD单位时间内从UAV i获取的能量
$θ_{i}$	IoTD与UAV之间的相对仰角	$P_{i}^{H}$	UAV i悬停功率
d_i	IoTD与UAV之间的距离	R	IoTD提供给所有UAV的总奖励
f_c	载波频率	c_i	UAV i单位时间的充电成本
s	光速	$κ$	单位能量的经济成本
$γ^{LoS}$	视线线路通信链路下的大尺度路径损耗系数	E_th	IoTD能量供应阈值
$γ^{NLoS}$	非视距通信链路下的大尺度路径损耗系数	$λ, μ$	IoTD效用函数中自定义的常数
${\bar{g}}_{i}$	UAV i与IoTD通信的平均信道增益	$t$	所有UAV的策略集合
t_i	UAV i服务IoTD的充电时长	$t_{- i}$	除UAV i外其他UAV的策略集合
e_i	IoTD从UAV i获得的能量	$t_{i}^{*}$	UAV i的最优充电时长
$η^{c}$	IoTD侧将射频率能量转直流的功率转换效率	R^*	IoTD提供的最优服务奖励

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