CN105634541A - Full-duplex simultaneous wireless information and power transfer method and nodes - Google Patents

Abstract

The invention provides a full-duplex simultaneous wireless information and power transfer method and nodes. The method comprises the steps that the second transmitter of a second node transmits a first signal to the first receiver of a first node; the second receiver of the second node receives a second signal transmitted by the first transmitter of the first node under the same frequency at the same time; and the second receiver of the second node receives the second signal and then performs power allocation processing on energy corresponding to the second signal. The first node and the second node work in a full-duplex mode in the process, i.e. the first node and the second node discover the signal and receive the signal at the same time in the same frequency band, and the second receiver of the second node receive the second signal and then performs power allocation processing on energy corresponding to the second signal so that utilization rate of frequency spectrum can be enhanced and simultaneous wireless information and power transfer can be realized through combination of the CCFD technology and the SWIPT technology.

Description

Full-duplex energy-carrying communication method and node

Technical Field

The present invention relates to communications technologies, and in particular, to a full-duplex energy-carrying communication method and a node.

Background

In view of the scarcity of wireless spectrum resources, Co-frequency full duplex (CCFD) is one of the core technologies of wireless communication technology to improve the utilization rate of wireless spectrum. Under the communication mode, the nodes in the communication system use the same time and the same frequency to simultaneously transmit and receive wireless signals, thereby improving the utilization rate of wireless frequency spectrum to a certain extent.

The wireless energy-carrying communication refers in particular to a technology of simultaneous transmission of wireless information and energy (SWIPT). In the SWIPT technique, nodes in a communication system can collect energy from radio frequency signals under the condition of limited energy, rather than relying on the energy supplied by the battery of the node. Therefore, the communication quality is further improved while the normal communication is ensured.

However, the above-mentioned CCFD technique can only improve the spectrum utilization rate, but cannot realize the simultaneous transmission of wireless information and energy; the SWIPT technology can only realize the simultaneous transmission of wireless information and energy, and cannot improve the utilization rate of frequency spectrum. Therefore, how to combine the CCFD technique and the SWIPT technique is an urgent problem to be solved in the industry.

Disclosure of Invention

The invention provides a full-duplex energy-carrying communication method and a node, which combine a CCFD technology and an SWIPT technology to realize energy-carrying communication while improving the utilization rate of a frequency spectrum.

In a first aspect, an embodiment of the present invention provides a full-duplex energy-carrying communication method, including:

a second transmitter of the second node transmitting the first signal to a first receiver of the first node; and a second receiver of the second node receives a second signal sent by a first transmitter of the first node at the same time and at the same time;

and the second node performs power distribution processing on energy corresponding to the second signal.

Optionally, the performing, by the second node, power allocation processing on energy corresponding to the second signal includes:

the second node divides energy corresponding to the second signal into a first part of energy and a second part of energy;

and the second node decodes information by adopting the first part of energy and collects energy by adopting the second part of energy.

Optionally, the magnitude of the second part of energy is greater than the minimum value for charging the second node.

Optionally, the method further includes:

the second node cancels interference of the first signal to the second signal.

Optionally, the sending, by the second transmitter of the second node, the first signal to the first receiver of the first node includes:

a second transmitter of the second node transmits the first signal to a first receiver of the first node within a transmit power threshold.

In a second aspect, an embodiment of the present invention provides a node, where the node is a second node, and the second node includes:

a second transmitter for transmitting the first signal to a first receiver of the first node;

a second receiver, configured to receive a second signal sent by the first transmitter of the first node at the same time by using the same frequency;

and the power divider is used for carrying out power distribution processing on the energy corresponding to the second signal.

Optionally, the power divider is specifically configured to divide energy corresponding to the second signal into a first part of energy and a second part of energy, perform information decoding using the first part of energy, and perform energy collection using the second part of energy.

Optionally, the magnitude of the second part of energy is greater than the minimum value for charging the second node.

Optionally, the node further includes:

a processor configured to cancel interference of the first signal with the second signal.

Optionally, the second transmitter is specifically configured to send the first signal to the first receiver of the first node within a transmission power threshold.

In the full-duplex energy-carrying communication method and node provided by the embodiment of the invention, the second transmitter of the second node sends the first signal to the first receiver of the first node, and at the same time, the second receiver of the second node receives the second signal sent by the first transmitter of the first node under the same frequency, and after the second receiver receives the second signal, the second node performs power distribution processing on energy corresponding to the second signal. In the process, the first node and the second node work in a full duplex mode, namely, the first node and the second node find and receive signals in the same frequency band at the same time, the second node carries out power distribution processing on energy corresponding to the second signal after the second receiver receives the second signal, and the CCFD technology and the SWIPT technology are combined, so that the spectrum utilization rate is improved, and meanwhile, energy carrying communication is realized.

Drawings

FIG. 1 is a schematic diagram of a system architecture for a full-duplex energy-carrying communication method according to the present invention;

fig. 2 is a flowchart of a full-duplex energy-carrying communication method according to an embodiment of the present invention;

fig. 3 is a relational graph of MMSE and SNR obtained by optimization with different algorithms in the optimization process of the full-duplex energy-carrying communication method according to an embodiment of the present invention;

fig. 4 is a diagram of a relationship between MMSE and iteration times obtained by adopting different algorithm optimizations in an optimization process of a full-duplex energy-carrying communication method according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a node according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a node according to another embodiment of the present invention.

Detailed Description

Fig. 1 is a schematic diagram of a system architecture to which the full-duplex energy-carrying communication method of the present invention is applied. As shown in fig. 1, the system architecture to which the full-duplex energy-carrying communication method of the present embodiment is applied includes: a first node and a second node which communicate by using a point-to-point communication mode, wherein a first transmitter of the first node is provided with N transmitting antennas, and a second receiver is provided with N receiving antennas; similarly, the second transmitter of the second node has N transmit antennas and the second receiver has N receive antennas. The first node and the second node have been operated in full duplex mode, i.e. simultaneously transmitting and receiving signals in the same frequency band. Where H denotes the channel, G denotes the self-interference channel, n denotes additive white gaussian noise, and s denotes the signal stream.

Referring to fig. 1, in the system architecture applicable to the full-duplex energy-carrying communication method of the present embodiment, the second receiver of the second node has a Power Splitting (PS) module, which can perform power splitting processing on energy corresponding to the second signal received by the second receiver of the second node. The full-duplex energy-carrying communication method of the present invention is explained in detail below on the basis of the system architecture.

Specifically, referring to fig. 2, fig. 2 is a flowchart of a full-duplex energy-carrying communication method according to an embodiment of the present invention, including:

101. a second transmitter of the second node transmitting the first signal to a first receiver of the first node; and the second receiver of the second node receives the second signal sent by the first transmitter of the first node at the same time and at the same time.

In this step, the first node and the second node both work in a full duplex mode, that is, find and receive signals simultaneously in the same frequency band. Specifically, a second transmitter of the second node sends a first signal to a first receiver of the first node, and at the same time, a second receiver of the second node receives a second signal sent by the first transmitter of the first node.

102. And the second node performs power distribution processing on energy corresponding to the second signal.

In this step, after the second receiver receives the second signal, the second node performs power allocation processing on energy corresponding to the second signal.

In the full-duplex energy-carrying communication method provided by the embodiment of the present invention, the second transmitter of the second node sends the first signal to the first receiver of the first node, and at the same time, the second receiver of the second node receives the second signal sent by the first transmitter of the first node, and after the second receiver receives the second signal, the second node performs power distribution processing on energy corresponding to the second signal. In the process, the first node and the second node work in a full duplex mode, namely, the first node and the second node find and receive signals in the same frequency band at the same time, the second node carries out power distribution processing on energy corresponding to the second signal after the second receiver receives the second signal, and the CCFD technology and the SWIPT technology are combined, so that the spectrum utilization rate is improved, and meanwhile, energy carrying communication is realized.

Optionally, in an embodiment of the present invention, the performing, by the second node, power allocation processing on the energy corresponding to the second signal includes: the second node divides energy corresponding to the second signal into a first part of energy and a second part of energy; and the second node decodes information by adopting the first part of energy and collects energy by adopting the second part of energy.

Specifically, the PS module of the second node allocates energy corresponding to the second signal received by the second receiver, and sets β e (0,1), so that the first part of energy is β times of the energy corresponding to the second signal, and the second part of energy is 1- β times of the energy corresponding to the second signal.

Optionally, in an embodiment of the present invention, the second node cancels interference of the first signal to the second signal.

Referring to FIG. 1, H₁For transmitting a second signal from a first transmitter of a first node to a second receiver of a second node₂A second transmitter of the second node transmits a channel of the first signal to a first receiver of the first node. Wherein H₁、H₂For example, a gaussian random channel, and the channel information is known. G₁Self-interference channel, G, generated when full duplex communication is performed for a first node₂Self-interference channel, G, generated for full duplex communication with a second node₁、G₂The impact on the communication quality needs to be eliminated. The channel formula is as follows:

$G_i={\stackrel{\‾}{G}}_i+{\mathrm{\ΔG}}_i---\left(1\right)$

in the formula (1), the first and second groups,representing the estimated channel, G_iRepresenting the true channel, Δ G_iThe estimation error for channel estimation has a mean of 0 and a variance of

Referring again to FIG. 1, n_iIndicating Additive White Gaussian Noise (AWGN),having a covariance matrix ofWherein,representing additive white Gaussian noise n_iVariance of (I)_NIt can be seen that, with the first node being node 1 and the second node being node 2, the signal received by node i ∈ {1, 2} can be represented as:

${\hat{y}}_i=H_j{F}_j{s}_j+G_i{F}_i{s}_i+n_i---\left(2\right)$

assuming that the first signal and the second signal are single stream data, s_i∈C^N×1，F_i∈C^N×NThe beamforming transmission matrix representing the complex signal power normalization is one of the main optimization targets in the simulation process. In the formula (2), i ≠ j, that is, j ≠ 2 when i ≠ 1, and j ≠ 1 when i ≠ 2. Referring again to fig. 1, since the first node does not have a PS device. Therefore, the first node only decodes the information, and the second node also collects energy while decoding the information. Thus, for the first node:

${\hat{y}}_1=H_2{F}_2{s}_2+G_1{F}_1{s}_1+n_1---\left(3\right)$

with reference to equation (1), the interference caused by the full duplex communication, that is, the interference of the second signal to the first signal, can be eliminated:

${\hat{y}}_1=H_2{F}_2{s}_2+G_1{F}_1{s}_1+n_1-{\stackrel{\‾}{G}}_1{F}_1{s}_1---\left(4\right)$

order to $Z_1=G_1{F}_1{s}_1-{\stackrel{\‾}{G}}_1{F}_1{s}_1={\mathrm{\ΔG}}_1{F}_1{s}_1,$ Then it can be obtained according to equation (4):

${\hat{y}}_1=H_2{F}_2{s}_2+z_1+n_1---\left(5\right)$

for the second node, the information of the second node is decoded:

$y_2=\sqrt{\mathrm{\β}}(H_1{F}_1{s}_1+G_2{F}_2{s}_2-{\stackrel{\‾}{G}}_2{F}_2{s}_2)+n_2---\left(6\right)$

in the same way, order $z_2=G_2{F}_2{s}_2-{\stackrel{\‾}{G}}_2{F}_2{s}_2={\mathrm{\ΔG}}_2{F}_2{s}_2,$ Then it can be obtained according to equation (6):

$y_2=\sqrt{\mathrm{\β}}(H_1{F}_1{s}_1+z_2)+n_2---\left(7\right)$

and capability collection of the second node:

$\begin{array}{c}EH(F_1,F_2)=(1-\mathrm{\β})\left|\right|H_1{F}_1{s}_1|{|}^2\\ =(1-\mathrm{\β})Tr\[H_1{F}_1{F}_1^H{H}_1^H\]\end{array}---\left(8\right)$

in the formula (8), the first and second groups,is represented by F₁It should be noted that, the energy collection process only considers the second signal sent by the first transmitter of the first node, however, in essence, the second node also communicates in full duplex mode, and a part of the first signal sent by the second transmitter is collected, and the first signal collected in the energy collection without consideration is also collected.

Next, the above-described full-duplex energy-carrying communication method is optimized. Specifically, in this embodiment, the above-mentioned full-duplex energy-carrying communication method is optimized by using minimum mean-Square-error (MMSE).

Specifically, assume that the MMSE of the first node is J₁MMSE of the second node is J₂And then:

$\begin{array}{c}{J}_1(F_1,F_2)=E\left\{\right||W_1{y}_1-s_2|{|}^2\}\\ =E\{\[W_1(H_2{F}_2{s}_2+z_1+n_1)-s_2\]{\[W_1(H_2{F}_2{s}_2+z_1+n_1)-s_2\]}^H\}\\ =Tr\left\{W_1{H}_2{F}_2{F}_2^H{H}_2^H{W}_1^H\right\}+Tr\{W_{1}E\[z_1{z}_1^H\]W_1^H\}+{\mathrm{\σ}}_n^{2}Tr\left\{W_1{W}_1^H\right\}\\ -Tr\left\{W_1{H}_2{F}_2\right\}-Tr\left\{F_2^H{H}_2^H{W}_1^H\right\}+S\\ =Tr\left\{W_1{H}_2{F}_2{F}_2^H{H}_2^H{W}_1^H\right\}+Tr\left\{W_1{W}_1^H\right\}{\mathrm{\σ}}_{err}^{2}Tr\[F_1{F}_1^H\]+{\mathrm{\σ}}_n^{2}Tr\left\{W_1{W}_1^H\right\}\\ -Tr\left\{W_1{H}_2{F}_2\right\}-Tr\left\{F_2^H{H}_2^H{W}_1^H\right\}+S\end{array}---\left(9\right)$

$\begin{array}{c}{J}_2(F_1,F_2)=E\left\{\right||W_2{y}_2-s_1|{|}^2\}\\ =E\{\[W_2\[\sqrt{\mathrm{\β}}(H_1{F}_1{s}_1+z_2)+n_2\]-s_1\]{\[W_2\[\sqrt{\mathrm{\β}}(H_1{F}_1{s}_1+z_2)+n_2\]-s_1\]}^H\}\\ =\mathrm{\β}Tr\left\{W_2{H}_1{F}_1{F}_1^H{H}_1^H{W}_2^H\right\}+\mathrm{\β}Tr\{W_{2}E\[z_2{z}_2^H\]W_2^H\}+{\mathrm{\σ}}_n^{2}Tr\left\{W_2{W}_2^H\right\}\\ -\sqrt{\mathrm{\β}}Tr\left\{W_2{H}_1{F}_1\right\}-\sqrt{\mathrm{\β}}Tr\left\{F_1^H{H}_1^H{W}_2^H\right\}+S\\ =\mathrm{\β}Tr\left\{W_2{H}_1{F}_1{F}_1^H{H}_1^H{W}_2^H\right\}+\mathrm{\β}Tr\left\{W_2{W}_2^H\right\}{\mathrm{\σ}}_{err}^{2}Tr\[F_2{F}_2^H\]\\ +{\mathrm{\σ}}_n^{2}Tr\left\{W_2{W}_2^H\right\}-\sqrt{\mathrm{\β}}Tr\left\{W_2{H}_1{F}_1\right\}-\sqrt{\mathrm{\β}}Tr\left\{F_1^H{H}_1^H{W}_2^H\right\}+S\end{array}---\left(10\right)$

in the above-mentioned formula (9) and formula (10), W₁、W₂Respectively representing the signal receiving matrixes of the first node and the second node, and S represents the number of data streams of the transmitted signals. Therefore, when the sum of the MMSE of the first node and the MMSE of the second node is minimum, the communication quality of the full-duplex energy-carrying communication method is optimal.

In addition, the following constraints also need to be considered:

first, a transmit power constraint.

In an embodiment of the present invention, the second transmitter of the second node transmits the first signal to the first receiver of the first node within a transmission power threshold.

Theoretically, to minimize MMSE, the greater the transmit power, the better. On one hand, however, in consideration of communication cost, the excessive transmission power brings huge energy burden; on the other hand, if the transmission power is too large, the radiation generated in the communication process will cause more harm to human body. Therefore, the first and second electrodes are formed on the substrate,the transmit power of the first and second nodes needs to meet a certain transmit power threshold, i.e. cannot exceed the maximum of their transmit power limits. Assume a transmit power threshold of the first node is p₁The transmission power threshold of the second node is p₂. Thus:

$\begin{array}{c}Tr\left(F_1{F}_1^H\right)\≤p_1\\ Tr\left(F_2{F}_2^H\right)\≤p_2\end{array}---\left(11\right)$

second, a constraint on the second portion of energy.

The system architecture applicable to the full-duplex energy-carrying communication method provided by the embodiment of the invention has the following characteristics: the first node and the second node adopt a full-duplex communication mode; second, full duplex is combined with wireless energy-carrying communication. Therefore, in order for the first node to charge the second node while transmitting the first signal, the power divider of the second node must satisfy the minimum value, e.g., e, for charging the second node with the second part of energy for energy collection when allocating the energy corresponding to the second signal received by the second receiver. This gives:

$(1-\mathrm{\β})Tr\[H_1{F}_1{F}_1^H{H}_1^H\]\≥e---\left(12\right)$

in summary, in the process of optimizing the full-duplex energy-carrying communication method, the problem that optimization is needed is as follows:

$\begin{array}{c}\begin{array}{cc}& \underset{F_i,W_i}{\min }{J}_1+J_2\\ s.t.& Tr\left(F_1{F}_1^H\right)\≤p_1\\ & Tr\left(F_2{F}_2^H\right)\≤p_2\end{array}\\ (1-\mathrm{\β})Tr\[H_1{F}_1{F}_1^H{H}_1^H\]\≥e\end{array}---\left(13\right)$

in the formula (13), F_i、W_iAnd in order to optimize variables, representing a signal transmitting matrix and a signal receiving matrix of the node.J₁+J₂In order to optimize the objective of the process,in order to achieve the first constraint,in order to make the constraint condition two,constraint three.

Since the problem in equation (13) that needs to be optimized is non-convex. Therefore, an iterative algorithm is introduced to split the problem to be optimized in formula (13) into 3 subproblems:

sub-problem one, determining signal receiving matrix W of first node and second node_i。

Specifically, a signal transmission matrix F for fixing the first node and the second node_iApplying Lagrangian such that $\frac{\∂J_i}{\∂W_i^{*}}=0.$ This gives:

$\begin{array}{c}{W}_1^{opt}=F_2^H{H}_2^H{(H_2{F}_2{F}_2^H{H}_2^H+(Tr\[{\mathrm{\ΔG}}_1{F}_1{F}_1^H{\mathrm{\ΔG}}_1^H\]+{\mathrm{\σ}}_n^2\left)I_N\right)}^{-1}\\ W_2^{opt}=\sqrt{\mathrm{\β}}{F}_1^H{H}_1^H{({\mathrm{\βH}}_1{F}_1{F}_1^H{H}_1^H+(\mathrm{\β}Tr\[{\mathrm{\ΔG}}_i{F}_i{F}_i^H{\mathrm{\ΔG}}_i^H\]+{\mathrm{\σ}}_n^2\left)I_N\right)}^{-1}\end{array}---\left(14\right)$

substituting equation (14) into equations (9) and (10) yields:

$Tr\left(ABCD\right)={\left(vec\right(D^T\left)\right)}^T(C^T\⊗A)vec\left(B\right)---\left(15\right)$

from equation (15) we can obtain:

$\begin{array}{c}\underset{f_i}{\min }\underset{i=1}{\overset{2}{\Σ}}{f}_i^H{P}_{0i}{f}_i-f_i^H{q}_i-q_i^H{f}_i+c_i\\ \begin{array}{cc}s.t.& f_1^H{P}_1{f}_1\≤p_1\\ & f_2^H{P}_2{f}_2\≤p_2\\ & f_1^H{P}_3{f}_1\≥e\end{array}\end{array}---\left(16\right)$

in the above formula (16), f_i＝vec(F_i)， $Q_1=I_N\⊗\left({\mathrm{\βH}}_1^H{W}_2^H{W}_2{H}_1\right),Q_2=I_N\⊗\left(H_2^H{W}_1^H{W}_1{H}_2\right),$ P_0i＝Q_i+w_iI_N， $q_1={\left(vec\right(\sqrt{\mathrm{\β}}{H}_1^H{W}_2^H\left)\right)}^H,q_2={\left(vec\right(H_2^H{W}_1^H\left)\right)}^H,c_i={\mathrm{\σ}}_n^{2}Tr\left\{W_i{W}_i^H\right\}+N,$ c＝c₁+c₂， $w_1={\mathrm{\σ}}_{err}^{2}Tr\left\{W_1{W}_1^H\right\},w_2={\mathrm{\σ}}_{err}^2\mathrm{\β}Tr\left\{W_2{W}_2^H\right\},P_i=I_N\⊗I_N,P_3=I_N\⊗(1-\mathrm{\β})H_1^H{H}_1.$

Thus, the first sub-problem can be converted to equation (16).

Signal receiving matrix W obtained by solving subproblem two and stator problem one_iAnd fixing the signal transmission matrix F of the first node₁Determining the signal emission matrix F of the second node using Lagrangian₂。

Subproblem three, fixed W_i、F₂Determining a signal transmission matrix F of the first node₁。

In the above process of optimizing equation (13), the following algorithms may be used for optimization: the equal power algorithm, the matlab toolkit Solution (SDR) algorithm, (succincessivecontexapproximation), the SCA) algorithm, and the suboptimal solution algorithm.

Specifically, when the algorithm is adopted for optimization, inequality constraint conditions are adoptedIs converted intoSo that the optimization solution set is reduced. Substituting the converted equation into equation (16)Defining a matrix U, all the eigenvalues of the matrix are positive numbers and the eigenvector is formed by P₃-τI_NAnd (4) forming. Wherein,IN is an N-dimensional identity matrix. Let f₁The constraints are taken into account by: x is the number of^HU^H(P₃-τI_N) Ux is more than or equal to 0. As such, the optimization problem can be converted to:

$\underset{x}{min}{x}^H{U}^H{P}_{01}Ux-x^H{U}^H{q}_1-q_{1}Ux+d_2---\left(17\right)$

the solution can be realized by applying a Lagrange algorithm, and the calculation complexity is greatly reduced.

Next, the optimization of equation (13) is compared for the above four algorithms. Specifically, referring to fig. 3 and fig. 4, fig. 3 is a relationship diagram of MMSE and SNR obtained by optimization with different algorithms in the optimization process of the full-duplex energy-carrying communication method according to an embodiment of the present invention; fig. 4 is a diagram of a relationship between MMSE and iteration times obtained by using different algorithms for optimization in an optimization process of a full-duplex energy-carrying communication method according to an embodiment of the present invention.

Referring to fig. 3, the abscissa represents the signal-to-noise ratio (SNR) and the ordinate represents the Mean-Square-error (MSE). The curves in the figure include: 4 dotted lines and 4 solid lines, wherein the stripThe curve of (a) represents N ═ 2, using the equal power algorithm (identity); beltThe curve of (1) represents that N is 4, and an equal power algorithm is adopted; beltThe curve of (a) represents N ═ 2, with a suboptimal algorithm (propossuboptimalschememe); beltThe curve representing N-4 with suboptimal algorithm, the curve with ○ representing N-2 with SDR algorithmThe method comprises the following steps of (proposeSDR-basescheme), wherein a curve with ● represents N4 and adopts an SDR algorithm, a curve with △ represents N2 and adopts an SCA algorithm (proposeSCA-basescheme), a curve with ▲ represents N4 and adopts an SCA algorithm.

Referring to fig. 4, the abscissa represents the number of iterations and the ordinate represents the MSE. The curves in the figure include: 4 dotted lines and 4 solid lines, wherein the stripThe curve of (d) represents SNR of 20, using an equal power algorithm; beltThe curve of (d) represents SNR of 40, using an equal power algorithm; beltThe curve of (d) represents SNR of 20, using an equal power algorithm; beltThe curve represents SNR 40 and adopts suboptimal algorithm, the curve with ○ represents SNR 20 and adopts SDR algorithm, the curve with ● represents SNR 40 and adopts SDR algorithm, the curve with △ represents SNR 20 and adopts SCA algorithm, the curve with ▲ represents SNR 40 and adopts SCA algorithm.

According to the above, it can be seen that: according to the full-duplex energy-carrying communication method, full duplex is combined with SWIPT, and an iterative algorithm is introduced to change the problem into local convex due to the fact that the whole optimization problem is non-convex; the low-complexity algorithm is poor in performance compared with the existing algorithm, but the calculation time is greatly saved in the calculation complexity.

Fig. 5 is a schematic structural diagram of a node according to an embodiment of the present invention, where the node provided in this embodiment is specifically a second node, and is a node embodiment corresponding to the embodiment of fig. 2 of the present invention, and a specific implementation process is not described herein again. Specifically, the node provided in this embodiment includes:

a second transmitter 11 for transmitting the first signal to a first receiver of the first node;

a second receiver 12, configured to receive a second signal sent by the first transmitter of the first node at the same time with the same frequency;

and the power divider 13 is configured to perform power division processing on the energy corresponding to the second signal.

In the second node provided by the embodiment of the present invention, the second transmitter of the second node sends the first signal to the first receiver of the first node, and at the same time, the second receiver of the second node receives the second signal sent by the first transmitter of the first node, and after the second receiver receives the second signal, the second node performs power distribution processing on energy corresponding to the second signal. In the process, the first node and the second node work in a full duplex mode, namely, the first node and the second node find and receive signals in the same frequency band at the same time, the second node carries out power distribution processing on energy corresponding to the second signal after the second receiver receives the second signal, and the CCFD technology and the SWIPT technology are combined, so that the spectrum utilization rate is improved, and meanwhile, energy carrying communication is realized.

Optionally, in an embodiment of the present invention, the power divider 13 is specifically configured to divide energy corresponding to the second signal into a first part of energy and a second part of energy, perform information decoding using the first part of energy, and perform energy collection using the second part of energy.

Optionally, in an embodiment of the present invention, the magnitude of the second part of energy is greater than a minimum value for charging the second node.

Fig. 6 is a schematic structural diagram of a node according to another embodiment of the present invention, and as shown in fig. 6, the node according to this embodiment further includes, on the basis of the structure shown in fig. 5:

a processor 14 for canceling the interference of the first signal to the second signal.

Optionally, in an embodiment of the present invention, the second transmitter 11 is specifically configured to send the first signal to the first receiver of the first node within a transmission power threshold.

Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A full-duplex energy-carrying communication method is characterized by comprising the following steps of;

a second transmitter of the second node transmitting the first signal to a first receiver of the first node; and a second receiver of the second node receives a second signal sent by a first transmitter of the first node at the same time and at the same time;

and the second node performs power distribution processing on energy corresponding to the second signal.

2. The method of claim 1, wherein the second node performs power allocation processing on the energy corresponding to the second signal, and wherein the power allocation processing comprises:

the second node divides energy corresponding to the second signal into a first part of energy and a second part of energy;

and the second node decodes information by adopting the first part of energy and collects energy by adopting the second part of energy.

3. The method of claim 2, wherein the magnitude of the second portion of energy is greater than a minimum value for charging the second node.

4. The method of claim 1, further comprising:

the second node cancels interference of the first signal to the second signal.

5. The method according to any of claims 1 to 4, wherein the transmitting of the first signal by the second transmitter of the second node to the first receiver of the first node comprises:

a second transmitter of the second node transmits the first signal to a first receiver of the first node within a transmit power threshold.

6. A node, wherein the node is a second node, and wherein the second node comprises:

a second transmitter for transmitting the first signal to a first receiver of the first node;

a second receiver, configured to receive a second signal sent by the first transmitter of the first node at the same time by using the same frequency;

and the power divider is used for carrying out power distribution processing on the energy corresponding to the second signal.

7. The node of claim 6,

the power divider is specifically configured to divide energy corresponding to the second signal into a first part of energy and a second part of energy, perform information decoding using the first part of energy, and perform energy collection using the second part of energy.

8. The node of claim 7, wherein the magnitude of the second portion of energy is greater than a minimum value for charging the second node.

9. The node of claim 6, further comprising:

a processor configured to cancel interference of the first signal with the second signal.

10. The node according to any of claims 6 to 9,

the second transmitter is specifically configured to send the first signal to the first receiver of the first node within a transmit power threshold.