US 11,641,591 B2Granted

Optimization method for UAV-based wireless information and energy transmission

AssigneeShenzhen University

InventorsYueling Che, Yabin Lai, Sheng Luo, Jie Ouyang, Kaishun Wu

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Abstract

An optimization method for UAV-based wireless information and energy transmission includes following steps: S1: reporting, by a wireless device, an energy state of the wireless device to a UAV; S2: detecting, by the UAV, a channel state between the UAV and the wireless device; and S3: selecting, by the UAV, an optimal action based on estimated revenue maximization according to an electric quantity of the UAV, an electric quantity of the wireless device, and the channel state. The use of the wireless device can reduce wiring costs, beautify the space, and ensure a smaller size and a lower power. By applying the UAV to information and energy transmission for the wireless devices, the data transmission rate and the energy conversion efficiency of networks are improved.

An optimization method for unmanned aerial vehicle (UAV)-based wireless information and energy transmission, comprising steps of:

S1:
reporting, by a wireless device, an energy state B(t) of the wireless device to a UAV, where B(t)∈[0,Bmax], where Bmax denotes a maximum energy state of the wireless device;
S2:
detecting, by the UAV, a channel state γ(t) between the UAV and the wireless device;
and
S3:
selecting, by the UAV, an optimal action based on an optimal design for wireless information and energy transmission of the UAV that is based on an estimated revenue maximization according to an electric quantity of the UAV, an electric quantity of the wireless device, and the channel state;
wherein the optimal design for wireless information and energy transmission of the UAV is modeled as a restrictive Markov decision process within limited time (MDP), a state space of the MDP is S={(γ(t), B(t), Er (t)):
γ(t)∈[0, +∞), B(t)∈[0, Bmax], Er(t)∈[0, Ep]}, an action space is
A
=
{
0
⁢
(
keep
silence
)
,
1
⁢
(
transmit
⁢
energy
⁢
to
the
⁢
wireless
⁢
device
)
,
2
⁢
(
transmit
⁢
information
⁢
to
the
⁢
wireless
⁢
device
)
}
,
the revenue is expressed as
R
t
(
S
⁡
(
t
)
,
a
⁡
(
t
)
)
=
log
2
(
1
+
P
⁡
(
t
)
⁢
γ
⁡
(
t
)
P
0
)
⁢
I
(
B
⁡
(
t
)
≥
E
d
⁢
I
⁡
(
E
r
(
t
)
≥
P
f
)
⁢
I
⁡
(
a
⁡
(
t
)
=
2
)
,
a state transition function of the UAV and a state transition function of the wireless device is respectively expressed as
B
⁡
(
t
+
1
)
⁢
{
B
⁡
(
t
)
,
a
⁡
(
t
)
=
0
B
⁡
(
t
)
+
P
f
(
t
)
⁢
γ
⁡
(
t
)
,
a
⁡
(
t
)
=
1
B
⁡
(
t
)
-
E
d
,
a
⁡
(
t
)
=
2
⁢
and
⁢
E
r
(
t
+
1
)
=
{
E
r
(
t
)
,
a
⁡
(
t
)
=
0
E
r
(
t
)
-
P
f
,
a
⁡
(
t
)
=
1
⁢
or
⁢
a
⁡
(
t
)
=
2
,
an objective function is expressed as
J
⁡
(
π
)
=
max
π
∑
t
=
1
T
R
t
(
S
⁡
(
t
)
,
a
⁡
(
t
)
)
,
where π represents an action strategy function, input is S(t) and output is a(t), J(π) represents a total revenue under a strategy π, Er(t) represents a remaining service energy of the UAV, P0 represents a noise power, I(•) represents an indicator function, P(t) represents an operating power of the UAV in time slot t, γ(t) represents independently identically distribution in time slot t, γ(t) represents a total signal fading, Ed represents the energy required by the wireless device for each time decoding, Ep represents a maximum value of the remaining service energy of the UAV, a(t) represents each action of the time slot t, T represents the UAV serves T time slots for the wireless device, Pf represents a transmission power of the UAV, Rt represents an instantaneous revenue of the time slot t.

267 more elements

Facts

Application

17/259,936Filed 16 Oct 2018

Priority

CN 201810774969.216 Jul 2018

Published

US 2021/0297877 A123 Sep 2021

Granted

2 May 2023

Term ends

Not estimatedThe source records don’t support an estimate.

Classification13 codes

H04W 24/02
Supervisory, monitoring or testing arrangements: arrangements for optimising operational condition
H02J 50/20
Circuit arrangements or systems for wireless supply or distribution of electric power: using microwaves or radio frequency waves
H02J 50/80
Circuit arrangements or systems for wireless supply or distribution of electric power: involving the exchange of data, concerning supply or…
H04B 7/18506
Airborne stations: communications with or from aircraft, i.e. aeronautical mobile service

Abstract

Claims9