CN107276737A - The data transmission method and system of multi-user's energy acquisition collaborative network physical layer - Google Patents
The data transmission method and system of multi-user's energy acquisition collaborative network physical layer Download PDFInfo
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Classifications
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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
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
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- H02J7/025—
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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
- H04B7/155—Ground-based stations
- H04B7/15592—Adapting at the relay station communication parameters for supporting cooperative relaying, i.e. transmission of the same data via direct - and relayed path
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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
- H04L12/10—Current supply arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/46—TPC being performed in particular situations in multi hop networks, e.g. wireless relay networks
Abstract
The invention provides a kind of data transmission method of multi-user's energy acquisition collaborative network physical layer and system, method includes：Multiple user node pilot signal transmitteds are to via node, base station and eavesdrop node；Multiple user nodes provide portion of energy and are acquired for via node；Via node is handled pilot signal based on amplification forwarding agreement, and is forwarded to base station and eavesdropping node；The pilot signal that the pilot signal and via node for being sent to base station according to user node are forwarded to base station calculates the first signal to noise ratio；The pilot signal that the pilot signal and via node for being sent to eavesdropping node according to user node are forwarded to eavesdropping node calculates the second signal to noise ratio；According to the first signal to noise ratio and the second signal-to-noise ratio computation user node to the safe capacity between base station；The maximum user node of selected safe capacity carries out data transmission with via node and base station, while user node, which is via node, carries out wireless charging；This method copes with the extra energy loss of trunking.
Description
Technical field
The present invention relates to cooperating relay technical field, more particularly to a kind of multi-user's energy acquisition collaborative network physical layer
Data transmission method and system.
Background technology
In recent years, cooperating relay technology has obtained extensive attention and concern.Cooperating relay technology is applied in channel radio
Letter field, is not only able to effectively utilize frequency spectrum resource, moreover it is possible to the reliability of lifting communication, reduces signal transmitting power, and
It is easy to the planning of communication system.In view of above-mentioned advantage, cooperating relay technology is by IEEE 802.11s-WLAN, 802.16j-
The standard such as WMAN, 802.20-MBWA (http://www.ieee802.org) adopt, with wide future in engineering applications.
But relay forwarding generates energy loss, the limited trunking of energy stores will be had using upper limitation.
The content of the invention
It is an object of the invention to for above-mentioned trunking in the prior art, there is provided a kind of multi-user's energy using limited
The data transmission method and system of amount collection collaborative network physical layer, cope with the extra energy loss of trunking.
A kind of data transmission method of multi-user's energy acquisition collaborative network physical layer, including：
Multiple user node pilot signal transmitteds are to via node, base station and eavesdrop node；
The multiple user node provides portion of energy and is acquired for the via node；
The via node is handled the pilot signal based on amplification forwarding agreement, and is forwarded to base station and eavesdropping
Node；
The pilot signal that the pilot signal and via node for being sent to base station according to user node are forwarded to base station calculates the
One signal to noise ratio；
The pilot signal and via node for being sent to eavesdropping node according to user node are forwarded to the pilot tone letter of eavesdropping node
Number calculate the second signal to noise ratio；
According to first signal to noise ratio and the second signal-to-noise ratio computation user node to the safe capacity between base station；
The maximum user node of selected safe capacity carries out data transmission with the via node and base station, while described use
Family node is that the via node carries out wireless charging.
Further, the pilot signal and via node for being sent to base station according to user node are forwarded to the pilot tone letter of base station
Number calculate the first signal to noise ratio, including：
3rd signal to noise ratio is calculated according to the pilot signal that user node is sent to base station；
4th signal to noise ratio is calculated according to the pilot signal that via node is forwarded to base station；
3rd signal to noise ratio and the 4th signal to noise ratio are added, the first signal to noise ratio is obtained.
Further, the 3rd signal to noise ratio is calculated by equation below：
4th signal to noise ratio is calculated by equation below：
First signal to noise ratio is calculated by equation below：
Wherein,For the 3rd signal to noise ratio, PSFor the transmit power of user node, hSn,DSent for n-th user node
Pilot signal to base station tie link,For the 4th signal to noise ratio, ε is the ginseng of via node energy acquisition power dividing
Number, hSn,RFor the link of n-th user node pilot signal transmitted to via node, hR,DFor between via node and base station
Link, η is the transformation efficiency of energy acquisition, and σ is variance, σ2=1,For the first signal to noise ratio.
Further, the pilot signal and via node for being sent to eavesdropping node according to user node are forwarded to eavesdropping node
Pilot signal calculate the second signal to noise ratio, including：
5th signal to noise ratio is calculated according to the pilot signal that user node is sent to eavesdropping node；
6th signal to noise ratio is calculated according to the pilot signal that via node is forwarded to eavesdropping node；
5th signal to noise ratio and the 6th signal to noise ratio are added, the second signal to noise ratio is obtained.
Further, the 5th signal to noise ratio is calculated by below equation：
6th signal to noise ratio is calculated by below equation：
Second signal to noise ratio is calculated by below equation：
Wherein,For the 5th signal to noise ratio, PSFor the transmit power of user node, hSn,ESent for n-th user node
Pilot signal extremely eavesdrops the tie link of node,For the 6th signal to noise ratio, ε is via node energy acquisition power dividing
Parameter, hSn,RFor the link of n-th user node pilot signal transmitted to via node, hR,EIt is that eavesdropping node and relaying are saved
Link between point, η is the transformation efficiency of energy acquisition, and σ is variance, σ2=1,For the second signal to noise ratio.
Further, the safe capacity is calculated by below equation：
Wherein,For the first signal to noise ratio,For the second signal to noise ratio,For safe capacity.
Further, the selection of maximum safe capacity is carried out by following principle：
Wherein,For safe capacity, PSFor the transmit power of user node, hSn,DPilot tone is sent for n-th user node
Signal is to the tie link of base station, and ε is the parameter of via node energy acquisition power dividing, hSn,RSent out for n-th user node
Pilot signal is sent to the link of via node, hR,DFor the link between via node and base station, η is imitated for the conversion of energy acquisition
Rate, ε is variance, ε2=1, hSn,EFor n-th user node pilot signal transmitted to the tie link for eavesdropping node, hSn,RFor N
Individual user node pilot signal transmitted is to the link of via node, hR,EFor the link between eavesdropping node and via node.
A kind of data transmission system of multi-user's energy acquisition collaborative network physical layer, including server, base station, relaying section
Point, eavesdropping node and multiple user nodes；
The multiple user node is used for pilot signal transmitted to via node, base station and eavesdrops node, and offer portion
Energy is divided to be acquired for the via node；
The via node is handled the pilot signal based on amplification forwarding agreement, and is forwarded to base station and eavesdropping
Node；
The server is used for a plurality of instruction of load store and performed：
The pilot signal that the pilot signal and via node for being sent to base station according to user node are forwarded to base station calculates the
One signal to noise ratio；
The pilot signal and via node for being sent to eavesdropping node according to user node are forwarded to the pilot tone letter of eavesdropping node
Number calculate the second signal to noise ratio；
According to first signal to noise ratio and the second signal-to-noise ratio computation user node to the safe capacity between base station；
The maximum user node of selected safe capacity；
The maximum user node of the safe capacity is used to carry out data transmission with the via node and base station, is simultaneously
The via node carries out wireless charging.
Further, the server is additionally operable to perform：
3rd signal to noise ratio is calculated according to the pilot signal that user node is sent to base station；
4th signal to noise ratio is calculated according to the pilot signal that via node is forwarded to base station；
3rd signal to noise ratio and the 4th signal to noise ratio are added, the first signal to noise ratio is obtained.
Further, the server is additionally operable to perform：
5th signal to noise ratio is calculated according to the pilot signal that user node is sent to eavesdropping node；
6th signal to noise ratio is calculated according to the pilot signal that via node is forwarded to eavesdropping node；
5th signal to noise ratio and the 6th signal to noise ratio are added, the second signal to noise ratio is obtained.
The data transmission method and system for multi-user's energy acquisition collaborative network physical layer that the present invention is provided, pass through relaying
The energy of reception is acquired, extra consumption of the relaying to energy is reduced, while the diversity of system can also be made full use of
Gain, with the security performance of the rapid lifting system of increase energy of number of users, will strengthen the safe energy acquisition trunk network of multi-user
The applicability of network, and provide theory support for the design and performance of future wireless network.
Brief description of the drawings
A kind of embodiment of data transmission method for multi-user's energy acquisition collaborative network physical layer that Fig. 1 provides for the present invention
Flow chart.
In Matlab in the data transmission method for multi-user's energy acquisition collaborative network physical layer that Fig. 2 provides for the present invention
Security interrupt probability under simulated environment is with main channel and the mean intensity of tapping channel ratio (MER) change curve schematic diagram.
Matlab is emulated in data transmission methods of the Fig. 3 to invent the multi-user's energy acquisition collaborative network physical layer provided
Security interrupt probability under environment is with validated user number change curve schematic diagram.
A kind of embodiment of data transmission system for multi-user's energy acquisition collaborative network physical layer that Fig. 4 provides for the present invention
Structural representation.
Embodiment
To make the purpose of the present invention, technical scheme and effect clearer, clear and definite, develop simultaneously embodiment pair referring to the drawings
The present invention is further described.It should be appreciated that specific embodiment described herein is not used to only to explain the present invention
Limit the present invention.
Embodiment one
With reference to Fig. 1, the present embodiment provides a kind of data transmission method of multi-user's energy acquisition collaborative network physical layer, bag
Include：
Step S101, multiple user node pilot signal transmitteds to via node, base station and eavesdropping node；
Step S102, the multiple user node provides portion of energy and is acquired for the via node；
Step S103, via node is handled the pilot signal based on amplification forwarding agreement, and is forwarded to base station
With eavesdropping node；
Step S104, the pilot signal and via node for being sent to base station according to user node is forwarded to the pilot tone letter of base station
Number calculate the first signal to noise ratio；
Step S105, eavesdropping node is forwarded to according to the pilot signal and via node that user node is sent to eavesdropping node
Pilot signal calculate the second signal to noise ratio；
Step S106, holds according to first signal to noise ratio and the second signal-to-noise ratio computation user node to the safety between base station
Amount；
Step S107, the maximum user node of selected safe capacity carries out data transmission with the via node and base station,
The user node is that the via node carries out wireless charging simultaneously.
Specifically, each user node pilot signal transmitted is to via node, base station and eavesdrops node, via node base
Processing is amplified to the pilot signal in amplification forwarding agreement (AF agreements), base station and eavesdropping node is forwarded to.
Further, base station merges pilot signal and the relaying section that user node is directly transmitted using maximum-ratio combing technology
The pilot signal of point forwarding.Calculation base station received signal to noise ratio, i.e. the first signal to noise ratio.
The pilot signal that the pilot signal and via node for being sent to base station according to user node are forwarded to base station calculates the
One signal to noise ratio, including：
3rd signal to noise ratio is calculated according to the pilot signal that user node is sent to base station；
4th signal to noise ratio is calculated according to the pilot signal that via node is forwarded to base station；
3rd signal to noise ratio and the 4th signal to noise ratio are added, the first signal to noise ratio is obtained.
Specifically, the 3rd signal to noise ratio is calculated by equation below：
4th signal to noise ratio is calculated by equation below：
First signal to noise ratio is calculated by equation below：
Wherein,For the 3rd signal to noise ratio, PSFor the transmit power of user node, hSn,DSent for n-th user node
Pilot signal to base station tie link,For the 4th signal to noise ratio, ε is the ginseng of via node energy acquisition power dividing
Number, hSn,RFor the link of n-th user node pilot signal transmitted to via node, hR,DFor between via node and base station
Link, η is the transformation efficiency of energy acquisition, and ε is variance, σ2=1,For the first signal to noise ratio.
Further, the pilot signal that eavesdropping node is directly transmitted using maximum-ratio combing technology merging user node is with
The pilot signal forwarded after node.Calculate eavesdropping node received signal to noise ratio, i.e. the second signal to noise ratio.
The pilot signal and via node for being sent to eavesdropping node according to user node are forwarded to the pilot tone letter of eavesdropping node
Number calculate the second signal to noise ratio, including：
5th signal to noise ratio is calculated according to the pilot signal that user node is sent to eavesdropping node；
6th signal to noise ratio is calculated according to the pilot signal that via node is forwarded to eavesdropping node；
5th signal to noise ratio and the 6th signal to noise ratio are added, the second signal to noise ratio is obtained.
5th signal to noise ratio is calculated by below equation：
6th signal to noise ratio is calculated by below equation：
Second signal to noise ratio is calculated by below equation：
Wherein,For the 5th signal to noise ratio, PSFor the transmit power of user node, hSn,ESent for n-th user node
Pilot signal extremely eavesdrops the tie link of node,For the 6th signal to noise ratio, ε is via node energy acquisition power dividing
Parameter, hSn,RFor the link of n-th user node pilot signal transmitted to via node, hR,EIt is that eavesdropping node and relaying are saved
Link between point, η is the transformation efficiency of energy acquisition, and σ is variance, σ2=1,For the second signal to noise ratio.
Further, defined according to safe capacity, the safe capacity is calculated by below equation：
Wherein,For the first signal to noise ratio,For the second signal to noise ratio,For safe capacity.
According to system safe capacity principle is maximized, by the method for exhaustion, a safe capacity corresponding with base station is selected maximum
User node carry out secure data communication, other users node keeps silent, and maximum safety is carried out especially by following principle
The selection of capacity：
Wherein,For safe capacity, PSFor the transmit power of user node, hSn,DPilot tone is sent for n-th user node
Signal is to the tie link of base station, and ε is the parameter of via node energy acquisition power dividing, hSn,RSent out for n-th user node
Pilot signal is sent to the link of via node, hR,DFor the link between via node and base station, η is imitated for the conversion of energy acquisition
Rate, σ is variance, σ2=1, hSn,EFor n-th user node pilot signal transmitted to the tie link for eavesdropping node, hSn,RFor N
Individual user node pilot signal transmitted is to the link of via node, hR,EFor the link between eavesdropping node and via node.
Selected user node carries out safety data transmission with base station and via node, and data are sent with fixed rate, and
Wireless charging is carried out to via node, until data transfer is finished.
Further, under Matlab simulated environment, the peace of institute's extracting method of the present invention is emulated using Monte Carlo computer
Full outage probability.In emulation experiment, link obeys Rayleigh fading between system node, and the mean intensity of main channel tie link is
1, the mean intensity of double bounce repeated link is 16, and user is to eavesdropping node and is relayed to being averaged for eavesdropping node channel link
Intensity is equal, the transmit power P of userS=10dB.The average of additive white Gaussian noise is zero at each node of system, and variance is 1.
The targeted security message transmission rate of system is 1bps/Hz, corresponding thresholding γth=3, power dividing factor ε=0.5, relaying
Energy acquisition efficiency eta=20%.In view of the randomness of channel and noise, independent operating 109It is secondary to circulate and result is averaged.
For circulating each time, the step S101- steps S107 in the present embodiment is performed.
Security interrupt definition of probability in the present embodiment is：
Wherein Prob (X) represents the probability that event X occurs.
With reference to Fig. 2, when Fig. 2 is number of users N=3, MER is in the range of 0~25dB, method and base that the present embodiment is provided
Stand and the security interrupt probabilistic simulation curve of the method for user is selected based on maximum received signal to noise ratio.Contrast is as can be seen that this implementation
The method that example is provided can make full use of tapping channel by maximizing the End-to-End Security capacity between base station and validated user
Information, the security performance of lifting system, security interrupt performance is better than based on maximum received signal to noise ratio method.
With reference to Fig. 3, Fig. 3 be as MER=30dB, total number of users N in the range of 1~10, the present embodiment institute's extracting method and
Security interrupt probabilistic simulation curve based on maximum received signal to noise ratio method.Contrast can be seen that with the increase of number of users, this
The security interrupt probability of embodiment institute extracting method diminishes rapidly, and the security performance of system transmission is lifted rapidly.
To sum up, the data transmission method for multi-user's energy acquisition collaborative network physical layer that the present embodiment is provided, in
It is acquired after the energy to reception, reduces extra consumption of the relaying to energy, while point of system can also be made full use of
Diversity gain, with the security performance of the rapid lifting system of increase energy of number of users, will strengthen the safe energy acquisition relaying of multi-user
The applicability of network, and provide theory support for the design and performance of future wireless network.
Embodiment two
With reference to Fig. 4, the present embodiment provides a kind of data transmission system of multi-user's energy acquisition collaborative network physical layer, bag
Include server 101, base station 102, via node 103, eavesdropping node 104 and multiple user nodes 105；
Multiple user nodes 105 are used for pilot signal transmitted to via node 103, base station 102 and eavesdropping node 104,
And portion of energy is provided be acquired for via node 104；
Via node 103 is handled pilot signal based on amplification forwarding agreement, and is forwarded to base station 102 and eavesdropping section
Point 104；
Server 101 is used for a plurality of instruction of load store and performed：
The pilot signal that the pilot signal and via node for being sent to base station according to user node are forwarded to base station calculates the
One signal to noise ratio；
The pilot signal and via node for being sent to eavesdropping node according to user node are forwarded to the pilot tone letter of eavesdropping node
Number calculate the second signal to noise ratio；
According to first signal to noise ratio and the second signal-to-noise ratio computation user node to the safe capacity between base station；
The maximum user node of selected safe capacity；
The maximum user node of the safe capacity is used to carry out data transmission with the via node and base station, is simultaneously
The via node carries out wireless charging.
Further, server 101 is additionally operable to perform：
3rd signal to noise ratio is calculated according to the pilot signal that user node is sent to base station；
4th signal to noise ratio is calculated according to the pilot signal that via node is forwarded to base station；
3rd signal to noise ratio and the 4th signal to noise ratio are added, the first signal to noise ratio is obtained.
Further, 101 servers are additionally operable to perform：
5th signal to noise ratio is calculated according to the pilot signal that user node is sent to eavesdropping node；
6th signal to noise ratio is calculated according to the pilot signal that via node is forwarded to eavesdropping node；
5th signal to noise ratio and the 6th signal to noise ratio are added, the second signal to noise ratio is obtained.
Server 101 is additionally operable to calculate safe capacity.
Specific computational methods refer to embodiment one, will not be repeated here.
According to system safe capacity principle is maximized, by the method for exhaustion, a safe capacity corresponding with base station is selected maximum
User node carry out secure data communication, other users node keeps silent.
Selected user node carries out safety data transmission with base station and via node, and data are sent with fixed rate, and
Wireless charging is carried out to via node, until data transfer is finished.
The data transmission system for multi-user's energy acquisition collaborative network physical layer that the present embodiment is provided, is docked by relaying
The energy of receipts is acquired, and reduces extra consumption of the relaying to energy, while the diversity gain of system can also be made full use of,
With the security performance of the rapid lifting system of increase energy of number of users, the suitable of the safe energy acquisition junction network of multi-user will be strengthened
With property, and theory support is provided for the design and performance of future wireless network.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (10)
1. a kind of data transmission method of multi-user's energy acquisition collaborative network physical layer, it is characterised in that including：
Multiple user node pilot signal transmitteds are to via node, base station and eavesdrop node；
The multiple user node provides portion of energy and is acquired for the via node；
The via node is handled the pilot signal based on amplification forwarding agreement, and is forwarded to base station and eavesdropping section
Point；
The pilot signal that the pilot signal and via node for being sent to base station according to user node are forwarded to base station calculates the first letter
Make an uproar ratio；
The pilot signal and via node for being sent to eavesdropping node according to user node are forwarded to the pilot signal meter of eavesdropping node
Calculate the second signal to noise ratio；
According to first signal to noise ratio and the second signal-to-noise ratio computation user node to the safe capacity between base station；
The maximum user node of selected safe capacity carries out data transmission with the via node and base station, while the user saves
Point carries out wireless charging for the via node.
2. the data transmission method of multi-user's energy acquisition collaborative network physical layer according to claim 1, its feature exists
In the pilot signal that the pilot signal and via node for being sent to base station according to user node are forwarded to base station calculates the first noise
Than, including：
3rd signal to noise ratio is calculated according to the pilot signal that user node is sent to base station；
4th signal to noise ratio is calculated according to the pilot signal that via node is forwarded to base station；
3rd signal to noise ratio and the 4th signal to noise ratio are added, the first signal to noise ratio is obtained.
3. the data transmission method of multi-user's energy acquisition collaborative network physical layer according to claim 2, its feature exists
In the 3rd signal to noise ratio is calculated by equation below：
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</msub>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
<mo>+</mo>
<msup>
<mi>&sigma;</mi>
<mn>2</mn>
</msup>
</mrow>
<mrow>
<msub>
<mi>&eta;&epsiv;P</mi>
<mi>S</mi>
</msub>
<mo>|</mo>
<msub>
<mi>h</mi>
<mrow>
<msub>
<mi>S</mi>
<mi>n</mi>
</msub>
<mo>,</mo>
<mi>R</mi>
</mrow>
</msub>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
</mrow>
</mfrac>
</mrow>
</mfrac>
<mo>;</mo>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>2</mn>
<mo>)</mo>
</mrow>
</mrow>
First signal to noise ratio is calculated by equation below：
<mrow>
<msubsup>
<mi>SNR</mi>
<msub>
<mi>D</mi>
<mi>n</mi>
</msub>
<mrow>
<mi>A</mi>
<mi>F</mi>
</mrow>
</msubsup>
<mo>=</mo>
<msubsup>
<mi>SNR</mi>
<mrow>
<msub>
<mi>S</mi>
<mi>n</mi>
</msub>
<mo>,</mo>
<mi>D</mi>
</mrow>
<mrow>
<mi>A</mi>
<mi>F</mi>
</mrow>
</msubsup>
<mo>+</mo>
<msubsup>
<mi>SNR</mi>
<mrow>
<msub>
<mi>S</mi>
<mi>n</mi>
</msub>
<mo>,</mo>
<mi>R</mi>
<mo>,</mo>
<mi>D</mi>
</mrow>
<mrow>
<mi>A</mi>
<mi>F</mi>
</mrow>
</msubsup>
<mo>;</mo>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>3</mn>
<mo>)</mo>
</mrow>
</mrow>
Wherein,For the 3rd signal to noise ratio, PSFor the transmit power of user node, hSn,DPilot tone is sent for n-th user node
Signal to base station tie link,For the 4th signal to noise ratio, ε is the parameter of via node energy acquisition power dividing,
hSn,RFor the link of n-th user node pilot signal transmitted to via node, hR,DFor the chain between via node and base station
Road, η is the transformation efficiency of energy acquisition, and σ is variance, σ2=1,For the first signal to noise ratio.
4. the data transmission method of multi-user's energy acquisition collaborative network physical layer according to claim 1, its feature exists
In the pilot signal that the pilot signal and via node for being sent to eavesdropping node according to user node are forwarded to eavesdropping node is calculated
Second signal to noise ratio, including：
5th signal to noise ratio is calculated according to the pilot signal that user node is sent to eavesdropping node；
6th signal to noise ratio is calculated according to the pilot signal that via node is forwarded to eavesdropping node；
5th signal to noise ratio and the 6th signal to noise ratio are added, the second signal to noise ratio is obtained.
5. the data transmission method of multi-user's energy acquisition collaborative network physical layer according to claim 4, its feature exists
In the 5th signal to noise ratio is calculated by below equation：
<mrow>
<msubsup>
<mi>SNR</mi>
<mrow>
<msub>
<mi>S</mi>
<mi>n</mi>
</msub>
<mo>,</mo>
<mi>E</mi>
</mrow>
<mrow>
<mi>A</mi>
<mi>F</mi>
</mrow>
</msubsup>
<mo>=</mo>
<msub>
<mi>P</mi>
<mi>S</mi>
</msub>
<mo>|</mo>
<msub>
<mi>h</mi>
<mrow>
<msub>
<mi>S</mi>
<mi>n</mi>
</msub>
<mo>,</mo>
<mi>E</mi>
</mrow>
</msub>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
<mo>;</mo>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>4</mn>
<mo>)</mo>
</mrow>
</mrow>
6th signal to noise ratio is calculated by below equation：
<mrow>
<msubsup>
<mi>SNR</mi>
<mrow>
<msub>
<mi>S</mi>
<mi>n</mi>
</msub>
<mo>,</mo>
<mi>R</mi>
<mo>,</mo>
<mi>E</mi>
</mrow>
<mrow>
<mi>A</mi>
<mi>F</mi>
</mrow>
</msubsup>
<mo>=</mo>
<mfrac>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>-</mo>
<mi>&epsiv;</mi>
<mo>)</mo>
<msub>
<mi>P</mi>
<mi>S</mi>
</msub>
<mo>|</mo>
<msub>
<mi>h</mi>
<mrow>
<msub>
<mi>S</mi>
<mi>n</mi>
</msub>
<mo>,</mo>
<mi>R</mi>
</mrow>
</msub>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
<mo>|</mo>
<msub>
<mi>h</mi>
<mrow>
<mi>R</mi>
<mo>,</mo>
<mi>E</mi>
</mrow>
</msub>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
</mrow>
<mrow>
<mo>|</mo>
<msub>
<mi>h</mi>
<mrow>
<mi>R</mi>
<mo>,</mo>
<mi>E</mi>
</mrow>
</msub>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
<mo>+</mo>
<mfrac>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>-</mo>
<mi>&epsiv;</mi>
<mo>)</mo>
<msub>
<mi>P</mi>
<mi>S</mi>
</msub>
<mo>|</mo>
<msub>
<mi>h</mi>
<mrow>
<msub>
<mi>S</mi>
<mi>n</mi>
</msub>
<mo>,</mo>
<mi>R</mi>
</mrow>
</msub>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
<mo>+</mo>
<msup>
<mi>&sigma;</mi>
<mn>2</mn>
</msup>
</mrow>
<mrow>
<msub>
<mi>&eta;&epsiv;P</mi>
<mi>S</mi>
</msub>
<mo>|</mo>
<msub>
<mi>h</mi>
<mrow>
<msub>
<mi>S</mi>
<mi>n</mi>
</msub>
<mo>,</mo>
<mi>R</mi>
</mrow>
</msub>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
</mrow>
</mfrac>
</mrow>
</mfrac>
<mo>;</mo>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>5</mn>
<mo>)</mo>
</mrow>
</mrow>
Second signal to noise ratio is calculated by below equation：
<mrow>
<msubsup>
<mi>SNR</mi>
<msub>
<mi>E</mi>
<mi>n</mi>
</msub>
<mrow>
<mi>A</mi>
<mi>F</mi>
</mrow>
</msubsup>
<mo>=</mo>
<msubsup>
<mi>SNR</mi>
<mrow>
<msub>
<mi>S</mi>
<mi>n</mi>
</msub>
<mo>,</mo>
<mi>E</mi>
</mrow>
<mrow>
<mi>A</mi>
<mi>F</mi>
</mrow>
</msubsup>
<mo>+</mo>
<msubsup>
<mi>SNR</mi>
<mrow>
<msub>
<mi>S</mi>
<mi>n</mi>
</msub>
<mo>,</mo>
<mi>R</mi>
<mo>,</mo>
<mi>E</mi>
</mrow>
<mrow>
<mi>A</mi>
<mi>F</mi>
</mrow>
</msubsup>
<mo>;</mo>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>6</mn>
<mo>)</mo>
</mrow>
</mrow>
Wherein,For the 5th signal to noise ratio, PSFor the transmit power of user node, hSn,EPilot tone is sent for n-th user node
Signal extremely eavesdrops the tie link of node,For the 6th signal to noise ratio, ε is the ginseng of via node energy acquisition power dividing
Number, hSn,RFor the link of n-th user node pilot signal transmitted to via node, hR,EFor eavesdropping node and via node it
Between link, η be energy acquisition transformation efficiency, σ is variance, σ2=1,For the second signal to noise ratio.
6. the data transmission method of multi-user's energy acquisition collaborative network physical layer according to claim 1, its feature exists
In the safe capacity is calculated by below equation：
<mrow>
<msub>
<mi>C</mi>
<msub>
<mi>S</mi>
<mi>n</mi>
</msub>
</msub>
<mo>=</mo>
<mi>max</mi>
<mo>&lsqb;</mo>
<mi>log</mi>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>+</mo>
<msubsup>
<mi>SNR</mi>
<msub>
<mi>D</mi>
<mi>n</mi>
</msub>
<mrow>
<mi>A</mi>
<mi>F</mi>
</mrow>
</msubsup>
<mo>)</mo>
</mrow>
<mo>-</mo>
<mi>log</mi>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>+</mo>
<msubsup>
<mi>SNR</mi>
<msub>
<mi>E</mi>
<mi>n</mi>
</msub>
<mrow>
<mi>A</mi>
<mi>F</mi>
</mrow>
</msubsup>
<mo>)</mo>
</mrow>
<mo>,</mo>
<mn>0</mn>
<mo>&rsqb;</mo>
<mo>;</mo>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>7</mn>
<mo>)</mo>
</mrow>
</mrow>
Wherein,For the first signal to noise ratio,For the second signal to noise ratio,For safe capacity.
7. the data transmission method of multi-user's energy acquisition collaborative network physical layer according to claim 1, its feature exists
In, pass through following principle carry out maximum safe capacity selection：
<mrow>
<mtable>
<mtr>
<mtd>
<mrow>
<msup>
<mi>n</mi>
<mo>*</mo>
</msup>
<mo>=</mo>
<mi>arg</mi>
<munder>
<mi>max</mi>
<mrow>
<mn>1</mn>
<mo>&le;</mo>
<mi>n</mi>
<mo>&le;</mo>
<mi>N</mi>
</mrow>
</munder>
<msub>
<mi>C</mi>
<msub>
<mi>S</mi>
<mi>n</mi>
</msub>
</msub>
</mrow>
</mtd>
</mtr>
<mtr>
<mtd>
<mrow>
<mo>=</mo>
<mi>arg</mi>
<munder>
<mi>max</mi>
<mrow>
<mn>1</mn>
<mo>&Element;</mo>
<mi>n</mi>
<mo>&le;</mo>
<mi>N</mi>
</mrow>
</munder>
<mrow>
<mo>(</mo>
<mfrac>
<mrow>
<mn>1</mn>
<mo>+</mo>
<msub>
<mi>P</mi>
<mi>S</mi>
</msub>
<mo>|</mo>
<msub>
<mi>h</mi>
<mrow>
<mi>S</mi>
<mi>n</mi>
<mo>,</mo>
<mi>D</mi>
</mrow>
</msub>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
<mo>+</mo>
<mfrac>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>-</mo>
<mi>&epsiv;</mi>
<mo>)</mo>
<msub>
<mi>P</mi>
<mi>S</mi>
</msub>
<mo>|</mo>
<msub>
<mi>h</mi>
<mrow>
<mi>S</mi>
<mi>n</mi>
<mo>,</mo>
<mi>R</mi>
</mrow>
</msub>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
<mo>|</mo>
<msub>
<mi>h</mi>
<mrow>
<mi>R</mi>
<mo>,</mo>
<mi>D</mi>
</mrow>
</msub>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
</mrow>
<mrow>
<mo>|</mo>
<msub>
<mi>h</mi>
<mrow>
<mi>R</mi>
<mo>,</mo>
<mi>D</mi>
</mrow>
</msub>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
<mo>+</mo>
<mfrac>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>-</mo>
<mi>&epsiv;</mi>
<mo>)</mo>
<msub>
<mi>P</mi>
<mi>S</mi>
</msub>
<mo>|</mo>
<msub>
<mi>h</mi>
<mrow>
<msub>
<mi>S</mi>
<mi>n</mi>
</msub>
<mo>,</mo>
<mi>R</mi>
</mrow>
</msub>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
<mo>+</mo>
<msup>
<mi>&sigma;</mi>
<mn>2</mn>
</msup>
</mrow>
<mrow>
<msub>
<mi>&eta;&epsiv;P</mi>
<mi>S</mi>
</msub>
<mo>|</mo>
<msub>
<mi>h</mi>
<mrow>
<msub>
<mi>S</mi>
<mi>n</mi>
</msub>
<mo>,</mo>
<mi>R</mi>
</mrow>
</msub>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
</mrow>
</mfrac>
</mrow>
</mfrac>
</mrow>
<mrow>
<mn>1</mn>
<mo>+</mo>
<msub>
<mi>P</mi>
<mi>S</mi>
</msub>
<mo>|</mo>
<msub>
<mi>h</mi>
<mrow>
<mi>S</mi>
<mi>n</mi>
<mo>,</mo>
<mi>E</mi>
</mrow>
</msub>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
<mo>+</mo>
<mfrac>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>-</mo>
<mi>&epsiv;</mi>
<mo>)</mo>
<msub>
<mi>P</mi>
<mi>S</mi>
</msub>
<mo>|</mo>
<msub>
<mi>h</mi>
<mrow>
<mi>S</mi>
<mi>n</mi>
<mo>,</mo>
<mi>R</mi>
</mrow>
</msub>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
<mo>|</mo>
<msub>
<mi>h</mi>
<mrow>
<mi>R</mi>
<mo>,</mo>
<mi>E</mi>
</mrow>
</msub>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
</mrow>
<mrow>
<mo>|</mo>
<msub>
<mi>h</mi>
<mrow>
<mi>R</mi>
<mo>,</mo>
<mi>E</mi>
</mrow>
</msub>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
<mo>+</mo>
<mfrac>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>-</mo>
<mi>&epsiv;</mi>
<mo>)</mo>
<msub>
<mi>P</mi>
<mi>S</mi>
</msub>
<mo>|</mo>
<msub>
<mi>h</mi>
<mrow>
<msub>
<mi>S</mi>
<mi>n</mi>
</msub>
<mo>,</mo>
<mi>R</mi>
</mrow>
</msub>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
<mo>+</mo>
<msup>
<mi>&sigma;</mi>
<mn>2</mn>
</msup>
</mrow>
<mrow>
<msub>
<mi>&eta;&epsiv;P</mi>
<mi>S</mi>
</msub>
<mo>|</mo>
<msub>
<mi>h</mi>
<mrow>
<msub>
<mi>S</mi>
<mi>n</mi>
</msub>
<mo>,</mo>
<mi>R</mi>
</mrow>
</msub>
<mo>|</mo>
</mrow>
</mfrac>
</mrow>
</mfrac>
</mrow>
</mfrac>
<mo>)</mo>
</mrow>
</mrow>
</mtd>
</mtr>
</mtable>
<mo>;</mo>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>8</mn>
<mo>)</mo>
</mrow>
</mrow>
Wherein,For safe capacity, PSFor the transmit power of user node, hSn,DFor n-th user node pilot signal transmitted
To the tie link of base station, ε is the parameter of via node energy acquisition power dividing, hSn,RSend and lead for n-th user node
Frequency signal is to the link of via node, hR,DFor the link between via node and base station, η is the transformation efficiency of energy acquisition, σ
For variance, σ2=1, hSn,EFor n-th user node pilot signal transmitted to the tie link for eavesdropping node, hSn,RUsed for n-th
Family node pilot signal transmitted is to the link of via node, hR,EFor the link between eavesdropping node and via node.
8. a kind of data transmission system of multi-user's energy acquisition collaborative network physical layer, it is characterised in that including server, base
Stand, via node, eavesdropping node and multiple user nodes；
The multiple user node is used for pilot signal transmitted to via node, base station and eavesdropping node, and provides part energy
Amount is acquired for the via node；
The via node is handled the pilot signal based on amplification forwarding agreement, and is forwarded to base station and eavesdropping section
Point；
The server is used for a plurality of instruction of load store and performed：
The pilot signal that the pilot signal and via node for being sent to base station according to user node are forwarded to base station calculates the first letter
Make an uproar ratio；
The pilot signal and via node for being sent to eavesdropping node according to user node are forwarded to the pilot signal meter of eavesdropping node
Calculate the second signal to noise ratio；
According to first signal to noise ratio and the second signal-to-noise ratio computation user node to the safe capacity between base station；
The maximum user node of selected safe capacity；
The maximum user node of the safe capacity is used to carry out data transmission with the via node and base station, while being described
Via node carries out wireless charging.
9. the data transmission system of multi-user's energy acquisition collaborative network physical layer according to claim 8, its feature exists
In the server is additionally operable to perform：
3rd signal to noise ratio is calculated according to the pilot signal that user node is sent to base station；
4th signal to noise ratio is calculated according to the pilot signal that via node is forwarded to base station；
3rd signal to noise ratio and the 4th signal to noise ratio are added, the first signal to noise ratio is obtained.
10. the data transmission system of multi-user's energy acquisition collaborative network physical layer according to claim 8, its feature exists
In the server is additionally operable to perform：
5th signal to noise ratio is calculated according to the pilot signal that user node is sent to eavesdropping node；
6th signal to noise ratio is calculated according to the pilot signal that via node is forwarded to eavesdropping node；
5th signal to noise ratio and the 6th signal to noise ratio are added, the second signal to noise ratio is obtained.
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| CN110808769A (en) * | 2019-11-13 | 2020-02-18 | 大连理工大学 | Wireless energy-carrying communication method based on OFDM (orthogonal frequency division multiplexing) amplification forwarding cooperative relay |
| CN111404590A (en) * | 2020-03-24 | 2020-07-10 | 青岛大学 | Wireless energy-carrying relay cooperative communication system containing eavesdropping node and resource allocation method thereof |
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| US20140126454A1 (en) * | 2012-11-05 | 2014-05-08 | Qualcomm Incorporated | Embms support in heterogeneous network |
| CN104486754A (en) * | 2014-11-26 | 2015-04-01 | 广西师范大学 | Relay selection method for cooperative communication system based on physical layer safety technology |
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| CN110808769A (en) * | 2019-11-13 | 2020-02-18 | 大连理工大学 | Wireless energy-carrying communication method based on OFDM (orthogonal frequency division multiplexing) amplification forwarding cooperative relay |
| CN110808769B (en) * | 2019-11-13 | 2021-05-18 | 大连理工大学 | Wireless energy-carrying communication method based on OFDM (orthogonal frequency division multiplexing) amplification forwarding cooperative relay |
| CN111404590A (en) * | 2020-03-24 | 2020-07-10 | 青岛大学 | Wireless energy-carrying relay cooperative communication system containing eavesdropping node and resource allocation method thereof |
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