CN106452503B - Full duplex relaying safe transmission method based on power distribution energy acquisition technology - Google Patents
Full duplex relaying safe transmission method based on power distribution energy acquisition technology Download PDFInfo
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- CN106452503B CN106452503B CN201610634069.9A CN201610634069A CN106452503B CN 106452503 B CN106452503 B CN 106452503B CN 201610634069 A CN201610634069 A CN 201610634069A CN 106452503 B CN106452503 B CN 106452503B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/36—Repeater circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
- H04L12/1863—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast comprising mechanisms for improved reliability, e.g. status reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
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Abstract
The full duplex relaying safe transmission method based on power distribution energy acquisition technology in the present invention, message transmitting procedure is divided into the first transmission time slot between information source and the stay of two nights and the second transmission time slot is completed, in the first transmission time slot, information source broadcasts useful information to relaying and listener-in, the signal being partially received is energy by energy acquisition technical transform by relay node, and the energy of acquisition is interfered eavesdropping of the listener-in to information source to send man made noise simultaneously；In the second transmission time slot, information source broadcasts man made noise's signal to relaying and listener-in, for relaying by being used for forwarding information to the stay of two nights to noise signal collecting energy, while by the energy of acquisition, listener-in's node receives the interference of information source transmitted noise signal to the eavesdropping of relaying repeating process.Relaying is full duplex operating mode in two time slots, and relaying eliminates self-interference signal using interference self-cancellation technology, to improve the security performance of system.
Description
Technical field
The present invention relates to fields of communication technology, more particularly to a kind of full duplex based on power distribution energy acquisition technology
Relay safe transmission method.
Background technique
With the fast development of network technology, the network structure to become increasingly complex make information safe transmission be easier by
To threat.Although the methods of high rise building safety agreement and Encryption Algorithm based on key cryptosystem can promote information to a certain extent
Safety, but the unfavorable shadow that the broadcast characteristic of wireless channel and the computing capability promoted rapidly can not be overcome to generate information security
It rings.Safety of physical layer technology is directly protected from physical layer by making full use of the spatial character and time-varying characteristics of wireless channel complexity
The safety of barrier information transmission in recent years has received widespread attention the research of energy conservation in wireless networks acquisition technique, for
Be not easy to use the junction network of wired energy supply, such as sensor network on a large scale, traditional method be powered using battery, but
It is the network operation higher cost for causing the later period, needs periodic replacement battery or charge the battery.
Summary of the invention
The purpose of the present invention is to provide a kind of full duplex relaying safe transmissions based on power distribution energy acquisition technology
Method improves the security performance of network, to ensure the safe transmission of information.
A kind of full duplex relaying safe transmission method based on power distribution energy acquisition technology is used for full duplex relaying net
Network, wherein full duplex relaying network includes four information source, relaying, the stay of two nights and listener-in nodes, and information passes between information source and the stay of two nights
Defeated process is divided into the first transmission time slot and the second transmission time slot and completes, and in first transmission time slot, information source is by useful information
To relaying and listener-in, the signal being partially received is energy by the technical transform of power distribution energy acquisition by relay node for broadcast
Amount, and the energy of acquisition is interfered into eavesdropping of the listener-in to information source to send man made noise simultaneously；In second transmission
In time slot, information source broadcasts man made noise's signal to relaying and listener-in, and relaying will be adopted by noise signal collecting energy
The energy of collection receives information source transmitted noise letter to the eavesdropping of relaying repeating process for forwarding information to the stay of two nights, listener-in's node
Number interference, relaying in first transmission time slot and the second transmission time slot is full duplex operating mode.
In the preferred embodiment, in first transmission time slot, the expression formula of relay reception signal isWherein PSFor the transmission power of information source, d1For information source to relaying away from
From m indicates path-loss factor, hSRFor information source to the channel parameter of relaying, hRRFor the self-interference channel between relaying dual-mode antenna
Parameter, x are unit variance source signal, nRExpression variance is σ2Additive white Gaussian noise.
In the preferred embodiment, in first transmission time slot, the power distribution energy acquisition technology of use
The energy of middle acquisition is expressed asWherein β (0 < β < 1) indicates power point
With the factor, η indicates energy conversion efficiency factor when carrying out wireless energy acquisition, and T indicates the total duration of two slot transmissions, together
When, the energy of the first transmission time slot relaying acquisition is completely used for the first transmission time slot and sends man made noise to interfere listener-in
Eavesdropping.
In the preferred embodiment, in first transmission time slot, after part signal is used for energy acquisition,
And relaying, under the operating mode of full duplex, relaying the signal being an actually-received isWherein PR1It indicates to relay the transmission power in the first time slot, andhRRTo relay self-interference channel parameter, fRThe unit variance sent for relaying is artificial
Noise signal, also, listener-in is in the reception signal expression of first transmission time slot are as follows:Wherein, d3Indicate distance of the information source to listener-in, d4It indicates
It is relayed to the distance of listener-in, hSEIndicate channel coefficients between information source and listener-in, hREIndicate channel system between relaying and listener-in
Number, in first transmission time slot, the received signal to noise ratio of relaying and listener-in are respectively indicated are as follows:
In second transmission time slot, the stay of two nights
Receive signal expression are as follows:Listener-in receives signal expressionWherein d2To be relayed to the distance between stay of two nights, fSFor in
After unit variance man made noise's signal of transmission, hRDIndicate channel coefficients between relaying and the stay of two nights, nRD, nREIndicate that variance is σ2
Additive white Gaussian noise, PR2It indicates to relay the transmission power in second transmission time slot, and?
In second transmission time slot, the stay of two nights receives signal expression are as follows:Listener-in receives letter
Number expression formula isWherein d2To be relayed to the distance between stay of two nights,
fSFor unit variance man made noise's signal that relaying is sent, hRDIndicate channel coefficients between relaying and the stay of two nights, nRD, nREExpression side
Difference is σ2Additive white Gaussian noise, PR2It indicates to relay the transmission power in second transmission time slot, andIn second transmission time slot, the stay of two nights receives signal expression are as follows:
Listener-in receives signal expressionWherein d2For relaying
Arrive the distance between stay of two nights, fSFor unit variance man made noise's signal that relaying is sent, hRDIndicate channel system between relaying and the stay of two nights
Number, nRD, nREIndicate that variance is σ2Additive white Gaussian noise, PR2Indicate relaying in the transmission function of second transmission time slot
Rate, andIn second transmission time slot, the received signal to noise ratio of the stay of two nights and listener-in are respectively as follows:
In the preferred embodiment, in first transmission time slot and the second transmission time slot, relaying is using solid
Definite decoding retransmission protocol, legitimate channel received signal to noise ratio are expressed as γD=min (γSR,γRD), listener-in uses selection combining side
Formula merges first transmission time slot and the second transmission time slot received signal, tapping channel received signal to noise ratio are expressed as γE=
max(γSE,γRE)。
In the preferred embodiment, further include enhance system security can power distribution step, the wink of system
When safe rate be expressed as CS=[CD-CE]+, wherein[a]+Table
Show max (a, 0).It can thus be concluded that average security rate representation is E (CS)=E ([CD-CE]+), E (i) expression is averaged, and power is worked as
When distribution factor takes optimal value, the average security rate of system reaches maximum, and security of system can reach best.
The full duplex relaying safe transmission method based on power distribution energy acquisition technology in the present invention, information source and the stay of two nights
Between message transmitting procedure be divided into the first transmission time slot and the second transmission time slot and complete, in the first transmission time slot, information source will have
It is broadcasted with information to relaying and listener-in, the signal being partially received is energy by energy acquisition technical transform by relay node
Amount, and the energy of acquisition is interfered into eavesdropping of the listener-in to information source to send man made noise simultaneously；In the second transmission time slot
In, information source broadcasts man made noise's signal to relaying and listener-in, and relaying is by noise signal collecting energy, while by acquisition
Energy receives information source transmitted noise signal to the eavesdropping of relaying repeating process for forwarding information to the stay of two nights, listener-in's node
Interference.Relaying in two time slots is full duplex operating mode, and relay using interference self-cancellation technology to self-interference signal into
Row is eliminated, due to all having carried out man made noise's scrambling to listener-in in two transmission time slots, to improve the safety of system
Performance, and relay and be considered as wireless energy signal acquisition technique is not easy to extensive wired energy supply suitable for some
Junction network, such as sensor network.
Detailed description of the invention
Fig. 1 a) it is the full duplex relaying secure communication of network system based on power distribution energy acquisition technology in the present invention
Transmission flow figure；
Fig. 1 b) it is the full duplex relaying network security transmission method based on power distribution energy acquisition technology in the present invention
Power distribution block diagram；
Fig. 2 is the two-dimensional topology figure under the junction network simulated environment in the present invention；
Fig. 3 be full duplex relaying network security transmission method based on power distribution energy acquisition technology in the present invention with
Conventional half duplex transmission method compares the variation comparison diagram when average security rate sends power increase with information source；
Fig. 4 is in 25dB, 15dB, and the information source of 5dB is sent under power, and average security rate takes with power allocation factor is optimal
Variation comparison diagram when value increases.
Specific embodiment
Following further describes the present invention with reference to the drawings,
It include four nodes, respectively information source, relaying, the stay of two nights and listener-in, figure in Fig. 1 (a) referring to Fig. 1 (a) and 1 (b)
S, R, D, E respectively represent information source, relaying, the stay of two nights and listener-in in 1 (b), and wherein full duplex relaying is used respectively using two antennas
In sending and receiving signal, other nodes are single antenna, and relaying is passive bus, and need to be acquired by wireless energy is its work
It energizes, since distance farther out, without direct path, is relayed in the first transmission time slot and the second transmission time slot between information source and the stay of two nights
It is full duplex operating mode, and relaying eliminates self-interference signal using interference self-cancellation technology, all letters in system
Road is all made of rayleigh fading channel, by completing safe lead to for the first transmission time slot and the second transmission time slot between information source and the stay of two nights
Letter, the specific steps are as follows:
Step 1), in the first transmission time slot, information source by information broadcast to relaying and listener-in, at the same time, in it is secondary
Work of making a gift to someone noise signal interferes the eavesdropping of listener-in, and the expression formula of relay reception signal isWherein PSFor the transmission power of information source, d1For information source to relaying away from
From m indicates path-loss factor, hSRFor information source to the channel parameter of relaying, hRRFor the self-interference channel between relaying dual-mode antenna
Parameter, x are unit variance source signal, nRExpression variance is σ2Additive white Gaussian noise；
Step 2), since relaying uses the energy acquisition technology based on power distribution, is being neglected in the first transmission time slot
When slightly acquisition antenna receives noise institute with faint energy, relaying the energy acquired in the first time slot is indicated are as follows:Wherein β (0 < β < 1) indicates that power allocation factor, η indicate to carry out nothing
Heat input acquire when the energy conversion efficiency factor, T indicate two slot transmissions total duration, meanwhile, described first transmission when
The energy of gap relaying acquisition is completely used for the first transmission time slot and sends man made noise to interfere the eavesdropping of listener-in；
Step 3) after part signal is used for energy acquisition, and is relayed in full duplex in the first transmission time slot
Under operating mode, relaying the signal being an actually-received isWherein PR1
It indicates to relay the transmission power in the first time slot, andhRRFor relaying self-interference letter
Road parameter, fRTo relay the unit variance man made noise's signal sent, also, listener-in is in the reception of first transmission time slot
Signal expression are as follows:Wherein, d3Indicate information source to listener-in
Distance, d4Indicate the distance for being relayed to listener-in, hSEIndicate channel coefficients between information source and listener-in, hREIndicate relaying and eavesdropping
Channel coefficients between person, in first transmission time slot, the received signal to noise ratio of relaying and listener-in are respectively indicated are as follows:
Step 4), in the second transmission time slot, information source broadcasts man made noise's signal to relaying and listener-in, relays to reception
The noise signal arrived acquires whole energy, while institute's collecting energy is completely used for forwarding information to the stay of two nights, listener-in's node pair
The eavesdropping of relay forwarding process receives the interference that information source sends artificial noise signal.It can thus be appreciated that the stay of two nights connects in the second time slot
Receive signal expression are as follows:
Listener-in receives signal expressionWherein d2To be relayed to the distance between stay of two nights, fSFor
Relay the unit variance man made noise's signal sent, hRDIndicate channel coefficients between relaying and the stay of two nights, nRD, nREIndicate that variance is
σ2Additive white Gaussian noise, PR2It indicates to relay the transmission power in the second time slot, andIt is passed second
In defeated time slot, the received signal to noise ratio of the stay of two nights and listener-in are respectively as follows:
Step 5) is based on above-mentioned steps, and considers relaying using fixed decoding retransmission protocol, legitimate channel received signal to noise ratio
It is expressed as γD=min (γSR,γRD), listener-in merges the first transmission time slot and the second transmission time slot using selection combining mode
Received signal, tapping channel received signal to noise ratio are expressed as γE=max (γSE,γRE)；
Step 6), is based on above-mentioned steps, and the instantaneous safe rate of system is expressed as CS=[CD-CE]+, wherein[a]+It indicates max (a, 0).It can thus be concluded that average security rate
It is expressed as E (CS)=E ([CD-CE]+), E () expression is averaged.
Step 7), by traversing power allocation factor, available optimal value when enabling security of system most strong,
And it analyzes information source and sends influence of the power increase to the optimal value of power allocation factor.
Fig. 2 is the two-dimensional topology figure under the junction network simulated environment in the present invention, wherein information source is located at point (0,0), in
After being located at point (0.5,0.3), the stay of two nights is located at point (1,0), and listener-in is located at point (0.5, -0.3).Fig. 3 be in the present invention based on
The full duplex relaying network security transmission method of power distribution energy acquisition technology is compared with conventional half duplex transmission method flat
Equal safe rate sends variation comparison diagram when power increases with information source, and simulated environment: power allocation factor β=0.6, channel decline
Fall Coefficient m=3, energy conversion efficiency η=0.4, relaying self-interference channel average channel gain E (| hRR|2)=0.1, other letters
Road average channel gain is 1, gives traditional half-duplex for dividing energy acquisition technology based on function as a comparison, in Fig. 3
The relaying of the change curve of junction network average security rate, traditional scheme is completely used for second in the energy that the first time slot acquires
Time slot forwarding information does not fully consider the safety in terms of ensureing physical layer transmission.As can be seen from Figure 3 this programme is averaged
Safe rate sends power P with information sourceSIncrease and increase, and be significantly higher than traditional scheme, to effectively enhance system
Safe transmission performance.Fig. 4 is in 25dB, 15dB, and the information source of 5dB is sent under power, the change of the optimal value of power allocation factor β
Change situation, simulated environment: power allocation factor β=0.6, channel fading coefficient m=3, energy conversion efficiency η=0.4, relaying is certainly
Interference channel average channel gain E (| hRR|2)=0.1, other channel average channel gains are 1, figure 4, it is seen that
Information source sends the increase of power so that the optimal value of power allocation factor moves to right, and when power allocation factor takes optimal value, is
The average security rate of system reaches maximum, and security of system can reach best.
In conclusion should the full duplex relaying safe transmission method based on power distribution energy acquisition technology, information source and letter
Message transmitting procedure is divided into the first transmission time slot between place and the second transmission time slot is completed, and in the first transmission time slot, information source will
Useful information is broadcasted to relaying and listener-in, and the signal being partially received is energy by energy acquisition technical transform by relay node
Amount, and the energy of acquisition is interfered into eavesdropping of the listener-in to information source to send man made noise simultaneously；In the second transmission time slot
In, information source broadcasts man made noise's signal to relaying and listener-in, and relaying is by noise signal collecting energy, while by acquisition
Energy receives information source transmitted noise signal to the eavesdropping of relaying repeating process for forwarding information to the stay of two nights, listener-in's node
Interference.Relaying in two time slots is full duplex operating mode, and relay using interference self-cancellation technology to self-interference signal into
Row is eliminated, due to all having carried out man made noise's scrambling to listener-in in two transmission time slots, to improve the safety of system
Performance, and relay and be considered as wireless energy signal acquisition technique is not easy to extensive wired energy supply suitable for some
Junction network, such as sensor network.
It above are only a specific embodiment of the invention, but the design concept of the present invention is not limited to this, all utilizations
This design makes a non-material change to the present invention, and should all belong to behavior that violates the scope of protection of the present invention.
Claims (3)
1. a kind of full duplex relaying safe transmission method based on power distribution energy acquisition technology is used for full duplex relaying net
Network, wherein full duplex relaying network includes four information source, relaying, the stay of two nights and listener-in nodes, it is characterised in that: information source and the stay of two nights
Between message transmitting procedure be divided into the first transmission time slot and the second transmission time slot and complete, in first transmission time slot, information source
Useful information is broadcasted to relaying and listener-in, the signal being partially received is passed through power distribution energy acquisition skill by relay node
Art is converted into energy, and the energy of acquisition is interfered eavesdropping of the listener-in to information source to send man made noise simultaneously；Institute
It states in the second transmission time slot, information source broadcasts man made noise's signal to relaying and listener-in, and relaying is by acquiring energy to noise signal
Amount, while the energy of acquisition is used for forwarding information to the stay of two nights, listener-in's node receives letter to the eavesdropping of relaying repeating process
The interference of source transmitted noise signal, relaying are full duplex operating mode in first transmission time slot and the second transmission time slot.
2. the full duplex relaying safe transmission method according to claim 1 based on power distribution energy acquisition technology, special
Sign is: in first transmission time slot, the expression formula of relay reception signal is
Wherein PSFor the transmission power of information source, d1For information source to the distance of relaying, m indicates path-loss factor, hSRFor information source to relaying
Channel parameter, hRRFor the self-interference channel parameter between relaying dual-mode antenna, x is unit variance source signal, nRIndicate variance
For σ2Additive white Gaussian noise, PR1Indicate relaying in the transmission power of the first time slot, fRThe unit variance people sent for relaying
Work noise signal.
3. the full duplex relaying safe transmission method according to claim 2 based on power distribution energy acquisition technology,
Be characterized in that: in first transmission time slot, the energy acquired in the power distribution energy acquisition technology of use is expressed asWherein β (0 < β < 1) indicates that power allocation factor, η indicate to carry out nothing
Heat input acquire when the energy conversion efficiency factor, T indicate two slot transmissions total duration, meanwhile, described first transmission when
The energy of gap relaying acquisition is completely used for the first transmission time slot and sends man made noise to interfere the eavesdropping of listener-in.
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| CN107171775B (en) * | 2017-05-09 | 2020-09-11 | 桂林电子科技大学 | Hybrid duplex transmission method for improving physical layer security in cognitive relay network |
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| CN107359926B (en) * | 2017-06-19 | 2019-12-13 | 华侨大学 | Full-duplex relay transmission method based on energy state |
| CN107659991B (en) * | 2017-10-09 | 2020-07-03 | 西北工业大学 | Energy distribution method in two-hop energy collection relay network |
| CN109004961A (en) * | 2018-07-05 | 2018-12-14 | 华侨大学 | The combined optimization method of full duplex destination scrambling safe transmission |
| CN109088696A (en) * | 2018-09-12 | 2018-12-25 | 西安交通大学 | A kind of MBM safe transmission method of physical layer based on man made noise |
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| CN109525985B (en) * | 2018-10-25 | 2022-05-03 | 华侨大学 | Full-duplex active eavesdropping method for wireless energy acquisition |
| CN109861728B (en) * | 2019-02-21 | 2021-06-18 | 哈尔滨工程大学 | Joint multi-relay selection and time slot resource allocation method for large-scale MIMO system |
| CN109743729B (en) * | 2019-02-23 | 2021-09-28 | 重庆邮电大学 | Secret transmission method of wireless energy-carrying cooperative system |
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