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 takes can communicate method and node

Technical field

The present invention relates to the communication technology, particularly relate to a kind of full duplex and take can communicate method and node.

Background technology

Rare in view of radio spectrum resources is improve wireless frequency spectrum utilization ratio, one of co-channel full duplex (Co-frequencyCo-timeFullDuplex, CCFD) core technology becoming wireless communication technology simultaneously. Under this kind of signalling methods, the node in communication system uses identical time, identical frequency, launches simultaneously and receives wireless signal, improves the utilization ratio of wireless frequency spectrum to a certain extent.

Wireless take to communicate refer in particular to wireless messages and energy transmits the technology of (SimultaneousInformationandPowerTransfer, SWIPT) simultaneously. In SWIPT technology, the node in communication system is when energy constraint, it is possible to harvest energy from radiofrequency signal, but not the energy that the battery of simple dependence node is supplied. Thus, while ensureing normal communication, communication quality is improved further.

But, above-mentioned CCFD technology can only improve the availability of frequency spectrum, and transmits while cannot realizing wireless messages and energy; And SWIPT technology is transmitted while only realizing wireless messages and energy, the availability of frequency spectrum cannot be improved. Therefore, how CCFD technology being combined with SWIPT technology, real is industry problem demanding prompt solution.

Summary of the invention

The present invention provides a kind of full duplex to take can communicate method and node, by CCFD technology being combined with SWIPT technology, while realizing the improving availability of frequency spectrum, it is achieved take and can communicate.

First aspect, the embodiment of the present invention provides a kind of full duplex to take the method that can communicate, and comprising:

2nd emitter of Section Point sends the first signal to the first receiving apparatus of first node; Further, the second signal that the 2nd receiving apparatus of described Section Point sends with the first emitter frequently receiving described first node simultaneously;

The energy that described second signal is corresponding is carried out power division process by described Section Point.

Optionally, the energy that described second signal is corresponding is carried out power division process by described Section Point, comprising:

Energy binned corresponding for described second signal is first part's energy and second section energy by described Section Point;

Described Section Point adopts described first part energy to carry out information decoding, adopts described second section energy to carry out collection of energy.

Optionally, the size of described second section energy is greater than the minimum value that described Section Point fills energy.

Optionally, the method also comprises:

Described Section Point eliminates described first signal to the interference of described second signal.

Optionally, the 2nd emitter of described Section Point sends the first signal to the first receiving apparatus of first node, comprising:

2nd emitter of described Section Point sends described first signal to the first receiving apparatus of described first node in transmitted power threshold value.

2nd aspect, the embodiment of the present invention provides a kind of node, and described node is Section Point, and described Section Point comprises:

2nd emitter, for sending the first signal to the first receiving apparatus of first node;

2nd receiving apparatus, for the second signal sent with the first emitter frequently receiving described first node simultaneously;

Power divider, for carrying out power division process to the energy that described second signal is corresponding.

Optionally, described power divider, specifically for being first part's energy and second section energy by energy binned corresponding for described second signal, adopts described first part energy to carry out information decoding, adopts described second section energy to carry out collection of energy.

Optionally, the size of described second section energy is greater than the minimum value that described Section Point fills energy.

Optionally, this node also comprises:

Treater, for eliminating described first signal to the interference of described second signal.

Optionally, described 2nd emitter, specifically for sending described first signal to the first receiving apparatus of described first node in transmitted power threshold value.

The full duplex that the embodiment of the present invention provides takes can communicate method and node, 2nd emitter of Section Point sends the first signal to the first receiving apparatus of first node, simultaneously with under frequency, 2nd receiving apparatus of Section Point receives the second signal that the first emitter of first node sends, the energy that second signal is corresponding, after the 2nd receiving apparatus receives second signal, is carried out power division process by Section Point. In this process, first node and Section Point be full duplex mode work all, namely in same frequency range, find signal and Received signal strength simultaneously, Section Point is after the 2nd receiving apparatus receives second signal, the energy that second signal is corresponding is carried out power division process, by CCFD technology is combined with SWIPT technology, it is achieved while improving the availability of frequency spectrum, it is achieved take and can communicate.

Accompanying drawing explanation

Fig. 1 is that full duplex of the present invention takes can the system configuration diagram that is suitable for of the method for communicating;

Fig. 2 takes the schema of the method that can communicate for full duplex that one embodiment of the invention provides;

Fig. 3 takes for full duplex one embodiment of the invention provided and can communicate in method optimizing process, the graph of a relation of MMSE and the SNR that employing algorithms of different optimization obtains;

Fig. 4 takes for full duplex one embodiment of the invention provided and can communicate in method optimizing process, the graph of a relation of the MMSE that employing algorithms of different optimization obtains and iteration number of times;

The structural representation of the node that Fig. 5 provides for one embodiment of the invention;

The structural representation of the node that Fig. 6 provides for another embodiment of the present invention.

Embodiment

Fig. 1 is that full duplex of the present invention takes can the system configuration diagram that is suitable for of the method for communicating. As described in Figure 1, the present embodiment full duplex is taken and can be comprised by the system framework that is suitable for of the method for communicating: the first node that point adopts point-to-point signalling methods to carry out communicating and Section Point, first emitter of this first node has N transmit antennas, and the 2nd receiving apparatus has N root receiving antenna; With reason, the 2nd emitter of Section Point has N transmit antennas, and the 2nd receiving apparatus has N root receiving antenna. This first node and Section Point be full duplex mode work all, namely sends signal and Received signal strength in same frequency range simultaneously. Wherein H represents channel, and G represents self-interference channel, and n represents additive white Gaussian noise, s expression signal stream.

Please refer to Fig. 1 again, the present embodiment full duplex is taken can in the system framework that is suitable for of the method for communicating, 2nd receiving apparatus of Section Point has a power division (PowerSplitting, PS) module, the energy that the second signal that the 2nd receiving apparatus of Section Point receives is corresponding can be carried out power division process by it. Below, on the basis of this system framework, full duplex of the present invention is taken and can the method for communicating be described in detail.

Concrete, see Fig. 2, Fig. 2 for full duplex that one embodiment of the invention provides takes the schema of the method that can communicate, can comprise:

101, the 2nd emitter of Section Point sends the first signal to the first receiving apparatus of first node; Further, the second signal that the 2nd receiving apparatus of described Section Point sends with the first emitter frequently receiving described first node simultaneously.

In this step, first node and Section Point be full duplex mode work all, namely finds signal and Received signal strength in same frequency range simultaneously. Concrete, the 2nd emitter of Section Point sends the first signal to the first receiving apparatus of first node, simultaneously with, under frequency, the 2nd receiving apparatus of Section Point receives the second signal that the first emitter of first node sends.

102, the energy that described second signal is corresponding is carried out power division process by described Section Point.

In this step, the energy that second signal is corresponding, after the 2nd receiving apparatus receives second signal, is carried out power division process by Section Point.

The full duplex that the embodiment of the present invention provides takes the method that can communicate, 2nd emitter of Section Point sends the first signal to the first receiving apparatus of first node, simultaneously with under frequency, 2nd receiving apparatus of Section Point receives the second signal that the first emitter of first node sends, the energy that second signal is corresponding, after the 2nd receiving apparatus receives second signal, is carried out power division process by Section Point. In this process, first node and Section Point be full duplex mode work all, namely in same frequency range, find signal and Received signal strength simultaneously, Section Point is after the 2nd receiving apparatus receives second signal, the energy that second signal is corresponding is carried out power division process, by CCFD technology is combined with SWIPT technology, it is achieved while improving the availability of frequency spectrum, it is achieved take and can communicate.

Optionally, in an embodiment of the present invention, the energy that described second signal is corresponding is carried out power division process by described Section Point, comprising: energy binned corresponding for described second signal is first part's energy and second section energy by described Section Point; Described Section Point adopts described first part energy to carry out information decoding, adopts described second section energy to carry out collection of energy.

Concrete, energy corresponding to the second signal that the 2nd receiving apparatus is received by the PS module of Section Point distributes, if �� is �� (0,1), then first part's energy be energy corresponding to second signal �� doubly, second section energy be energy corresponding to second signal 1-�� doubly.

Optionally, in an embodiment of the present invention, described Section Point eliminates described first signal to the interference of described second signal.

Please refer to Fig. 1, H again₁For first node the first emitter to Section Point the 2nd receiving apparatus launch second signal channel, H₂For the 2nd emitter of Section Point launches the channel of the first signal to the first receiving apparatus of first node. Wherein, H₁��H₂It is such as gaussian random channel, and channel information is known. G₁The self-interference channel produced when full duplex communicates is carried out, G for first node₂The self-interference channel produced when full duplex communicates is carried out, G for Section Point₁��G₂Communication quality there is impact, it is necessary to eliminated. Channel formula is as follows:

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

In formula (1),Represent and estimate channel, G_iRepresent true channel, �� G_iFor the evaluated error that channel estimating causes, its average is 0, and variance is

Please refer to Fig. 1, n again_iRepresenting additive white Gaussian noise (AdditiveWhiteGaussianNoise, AWGN), its covariance matrix isWherein,Represent adding property white Gaussian noise n_iVariance, I_NRepresent the unit matrix of N dimension. It can thus be seen that be node 1 taking first node, Section Point is node 2, node i �� the signal that 1,2} receives can represent:

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

Assume that the first signal, second signal are single current data, then s_i��C^N��1, F_i��C^N��NRepresent the normalized beamforming transmission matrix of sophisticated signal power, it is one of optimization aim main in simulation process. In formula (2), i �� j, i.e. j=1 when j=2, i=2 during i=1. Please refer to Fig. 1 again, owing to first node does not have PS device. Therefore, first node only carries out information decoding, and Section Point also carries out collection of energy while carrying out information decoding. Therefore, for first node:

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

In conjunction with formula (1), eliminating the interference that full duplex communication brings, namely second signal is to the interference of the first signal, can obtain:

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

Order $Z_1=G_1{F}_1{s}_1-{\stackrel{\‾}{G}}_1{F}_1{s}_1={\mathrm{\ΔG}}_1{F}_1{s}_1,$ Then can obtain according to formula (4):

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

For Section Point, the information decoding of Section Point:

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

With reason, order $z_2=G_2{F}_2{s}_2-{\stackrel{\‾}{G}}_2{F}_2{s}_2={\mathrm{\ΔG}}_2{F}_2{s}_2,$ Then can obtain according to formula (6):

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

The ability of Section Point is collected:

$\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 formula (8),Represent F₁Conjugate transpose, after second signal is distributed by power divider, the 1-�� times of energy of the energy that second signal is corresponding, namely second section energy be used for energy collection. It should be noted that, above-mentioned collection of energy process only considered the second signal that the first emitter of first node sends, but, substantially, Section Point also adopts full-duplex mode communication, part first signal that 2nd emitter sends also can be collected, above-mentioned the first signal not considering to collect in collection of energy.

Below, above-mentioned full duplex is taken and can the method for communicating be optimized. Concrete, in the present embodiment, adopt minimum mean-squared error (MinimizingMean-Square-Errorcriterion, MMSE) that above-mentioned full duplex is taken and can the method for communicating be optimized.

Concrete, it is assumed that the MMSE of first node is J₁, the MMSE of Section Point is J₂, 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 above-mentioned formula (9) and formula (10), W₁��W₂Representing the Signal reception matrix of first node, Section Point respectively, S represents the data fluxion sending signal. It can thus be seen that when the MMSE of first node and the MMSE of Section Point with, time minimum, the communication quality that above-mentioned full duplex takes the method that can communicate reaches optimum.

In addition, in addition it is also necessary to consider following constraint condition:

First, transmit power constraint.

In one embodiment of the invention, the 2nd emitter of described Section Point sends described first signal to the first receiving apparatus of described first node in transmitted power threshold value.

In theory, MMSE will be made minimum, then transmitted power is the bigger the better. But, consider communications cost problem on the one hand, transmitted power is crossed conference and is brought huge energy burden; On the other hand, transmitted power is too big, and the harm that human body can be caused by the radiation produced in communication process is more big. So, the transmitted power of first node and Section Point needs to meet certain transmitted power threshold value, namely can not exceed the maximum value of its transmitted power restriction. The transmitted power threshold value assuming first node is p₁, the transmitted power threshold value of Section Point is p₂. Therefore:

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

Secondly, the constraint condition of second section energy.

Full duplex described in the embodiment of the present invention is taken can have following feature by the system framework that is suitable for of the method for communicating: the first, first node and Section Point adopt full duplex communication pattern; Two, full duplex takes, with wireless, the combination that can communicate. Therefore, can in order to make first node be filled by Section Point while sending the first signal, then the power divider of Section Point is when the energy that the second signal received by the 2nd receiving apparatus is corresponding distributes, second section energy for collection of energy must meet the minimum value that Section Point fills energy, and this minimum value is such as e. Thus can obtain:

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

Summary is it will be seen that the full duplex stated taken can in the process that is optimized of the method for communicating, it is necessary to the problem of optimization:

$\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 formula (13), F_i��W_iFor optimization variable, the signal emission matrix of representation node and Signal reception matrix.J₁+J₂For optimization aim,For constraint condition one,For constraint condition two,For constraint condition three.

Owing to formula (13) needing the problem optimized be non-convex. Therefore, introduce iterative algorithm, it be split as 3 subproblems by formula (13) needs the problem optimized:

Subproblem one, determine first node, the Signal reception matrix W of Section Point_i��

Concrete, the signal emission matrix F of fixing first node, Section Point_i, application Lagrange makes $\frac{\∂J_i}{\∂W_i^{*}}=0.$ Thus can obtain:

$\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)$

Bring formula (14) into formula (9), (10) can obtain:

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

Can obtain according to formula (15):

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

In above-mentioned 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, above-mentioned subproblem one can be converted to formula (16).

Subproblem two, stator problem one solve the Signal reception matrix W drawn_i, and the signal emission matrix F of fixing first node₁, use Lagrange to determine the signal emission matrix F of Section Point₂��

Subproblem three, fixing W_i��F₂, it is determined that the signal emission matrix F of first node₁��

In the above-mentioned process that formula (13) is optimized, following several algorithm can be adopted to be optimized: equipower algorithm, matlab tool kit solve (semi-definiterelaxation, SDR) algorithm, (successiveconvexapproximation), SCA) algorithm, suboptimal solution algorithm determine.

Concrete, when adopting above-mentioned algorithm to be optimized, by inequality constraint conditionBe converted toMake to optimize disaggregation to reduce. The equation being converted to is brought in formula (16)Defining a matrix U, the eigenwert of this matrix is that positive number and proper vector are by P entirely₃-��I_NForm. Wherein,IN is that N ties up unit matrix. Make f₁=Ux, bringing constraint condition into can obtain: x^HU^H(P₃-��I_N) Ux >=0. Thus, optimization problem can be exchanged into:

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

Use Lagrange algorithm to solve, significantly reduce computation complexity.

Below, the optimization of formula (13) is compared by above-mentioned four kinds of algorithms. Concrete, can take for the full duplex that one embodiment of the invention is provided see Fig. 3 and Fig. 4, Fig. 3 and can communicate in method optimizing process, the graph of a relation of MMSE and the SNR that employing algorithms of different optimization obtains; Fig. 4 takes for full duplex one embodiment of the invention provided and can communicate in method optimizing process, the graph of a relation of the MMSE that employing algorithms of different optimization obtains and iteration number of times.

Please refer to Fig. 3, X-coordinate is signal to noise ratio (SignalNoiseRatio, SNR), and ordinate zou is square error (Mean-Square-Errorcriterion, MSE). Curve in figure comprises: 4 dotted lines and 4 solid lines, wherein, and bandGraphical representation N=2, adopt equipower algorithm (Identityscheme); BandGraphical representation N=4, adopt equipower algorithm; BandGraphical representation N=2, adopt sub-optimal algorithm (proposesuboptimalscheme); BandGraphical representation N=4, employing sub-optimal algorithm; Graphical representation N=2 with zero, employing SDR algorithm (proposeSDR-basescheme); Graphical representation N=4 with ��, employing SDR algorithm; Graphical representation N=2 with ��, employing SCA algorithm (proposeSCA-basescheme); Band �� graphical representation N=4, adopt SCA algorithm. When adopting equipower algorithm to be optimized, as long as meeting each constraint condition, do not do any optimization. According to emulation result: the performance of SDR algorithm is best; SCA algorithm takes second place, little compared to SDR difference; It is poor that suboptimization algorithm compares first two algorithm performance, but is significantly better than equipower algorithm.

Please refer to Fig. 4, X-coordinate is iteration number of times, and ordinate zou is MSE. Curve in figure comprises: 4 dotted lines and 4 solid lines, wherein, and bandGraphical representation SNR=20, adopt equipower algorithm; BandGraphical representation SNR=40, adopt equipower algorithm; BandGraphical representation SNR=20, adopt equipower algorithm; BandGraphical representation SNR=40, employing sub-optimal algorithm; Graphical representation SNR=20 with zero, employing SDR algorithm; Graphical representation SNR=40 with ��, employing SDR algorithm; Graphical representation SNR=20 with ��, employing SCA algorithm; Band �� graphical representation SNR=40, adopt SCA algorithm. Can find out that curve negotiating iterative algorithm is tending towards convergence by emulation result, it ensures that the exactness of algorithm, wherein the speed of convergence of SCA algorithm is the fastest.

According to above-mentioned known: the full duplex described in the embodiment of the present invention takes the method that can communicate, and full duplex is combined with SWIPT, and, due to whole optimization problem non-convex, introduce iterative algorithm, problem is turned into local for convex; Introduce low complexity algorithm, poor compared with existing algorithm in performance, but on computation complexity, greatly save computing time.

The structural representation of the node that Fig. 5 provides for one embodiment of the invention, the node that the present embodiment provides is specially Section Point, is the node embodiment corresponding with Fig. 2 embodiment of the present invention, and specific implementation process does not repeat them here. Concrete, the node that the present embodiment provides comprises:

2nd emitter 11, for sending the first signal to the first receiving apparatus of first node;

2nd receiving apparatus 12, for the second signal sent with the first emitter frequently receiving described first node simultaneously;

Power divider 13, for carrying out power division process to the energy that described second signal is corresponding.

The Section Point that present example provides, 2nd emitter of Section Point sends the first signal to the first receiving apparatus of first node, simultaneously with under frequency, 2nd receiving apparatus of Section Point receives the second signal that the first emitter of first node sends, the energy that second signal is corresponding, after the 2nd receiving apparatus receives second signal, is carried out power division process by Section Point. In this process, first node and Section Point be full duplex mode work all, namely in same frequency range, find signal and Received signal strength simultaneously, Section Point is after the 2nd receiving apparatus receives second signal, the energy that second signal is corresponding is carried out power division process, by CCFD technology is combined with SWIPT technology, it is achieved while improving the availability of frequency spectrum, it is achieved take and can communicate.

Optionally, in an embodiment of the present invention, described power divider 13, specifically for being first part's energy and second section energy by energy binned corresponding for described second signal, adopt described first part energy to carry out information decoding, adopt described second section energy to carry out collection of energy.

Optionally, in an embodiment of the present invention, the size of described second section energy is greater than the minimum value that described Section Point fills energy.

The structural representation of the node that Fig. 6 provides for another embodiment of the present invention, as shown in Figure 6, the node described in the present embodiment, on the basis of structure shown in above-mentioned Fig. 5, further, also comprise:

Treater 14, for eliminating described first signal to the interference of described second signal.

Optionally, in an embodiment of the present invention, described 2nd emitter 11, specifically for sending described first signal to the first receiving apparatus of described first node in transmitted power threshold value.

One of ordinary skill in the art will appreciate that: all or part of step realizing above-mentioned each embodiment of the method can be completed by the hardware that programmed instruction is relevant. Aforesaid program can be stored in a computer read/write memory medium. This program, when performing, performs the step comprising above-mentioned each embodiment of the method; And aforesaid storage media comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium.

Last it is noted that above each embodiment is only in order to illustrate the technical scheme of the present invention, it is not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein some or all of technology feature is carried out equivalent replacement; And these amendments or replacement, do not make the scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution.

Claims (10)

1. a full duplex takes the method that can communicate, it is characterised in that, comprise;

2nd emitter of Section Point sends the first signal to the first receiving apparatus of first node; Further, the second signal that the 2nd receiving apparatus of described Section Point sends with the first emitter frequently receiving described first node simultaneously;

The energy that described second signal is corresponding is carried out power division process by described Section Point.

2. method according to claim 1, it is characterised in that, the energy that described second signal is corresponding is carried out power division process by described Section Point, comprising:

Energy binned corresponding for described second signal is first part's energy and second section energy by described Section Point;

Described Section Point adopts described first part energy to carry out information decoding, adopts described second section energy to carry out collection of energy.

3. method according to claim 2, it is characterised in that, the size of described second section energy is greater than the minimum value that described Section Point fills energy.

4. method according to claim 1, it is characterised in that, also comprise:

Described Section Point eliminates described first signal to the interference of described second signal.

5. method according to the arbitrary item of Claims 1 to 4, it is characterised in that, the 2nd emitter of described Section Point sends the first signal to the first receiving apparatus of first node, comprising:

2nd emitter of described Section Point sends described first signal to the first receiving apparatus of described first node in transmitted power threshold value.

6. a node, it is characterised in that, described node is Section Point, and described Section Point comprises:

2nd emitter, for sending the first signal to the first receiving apparatus of first node;

2nd receiving apparatus, for the second signal sent with the first emitter frequently receiving described first node simultaneously;

Power divider, for carrying out power division process to the energy that described second signal is corresponding.

7. node according to claim 6, it is characterised in that,

Described power divider, specifically for being first part's energy and second section energy by energy binned corresponding for described second signal, adopts described first part energy to carry out information decoding, adopts described second section energy to carry out collection of energy.

8. node according to claim 7, it is characterised in that, the size of described second section energy is greater than the minimum value that described Section Point fills energy.

9. node according to claim 6, it is characterised in that, also comprise:

Treater, for eliminating described first signal to the interference of described second signal.

10. node according to the arbitrary item of claim 6��9, it is characterised in that,

Described 2nd emitter, specifically for sending described first signal to the first receiving apparatus of described first node in transmitted power threshold value.