CN104506284B - The implementation method of ARQ agreements in SWIPT junction networks based on relay selection - Google Patents
The implementation method of ARQ agreements in SWIPT junction networks based on relay selection Download PDFInfo
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- CN104506284B CN104506284B CN201410796587.1A CN201410796587A CN104506284B CN 104506284 B CN104506284 B CN 104506284B CN 201410796587 A CN201410796587 A CN 201410796587A CN 104506284 B CN104506284 B CN 104506284B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a kind of implementation method of ARQ agreements in SWIPT junction networks based on relay selection, the agreement includes：In transmitting terminal, source node waits the feedback information from destination node to destination node broadcast transmission packet.In receiving terminal, destination node is detected according to the information received, if being properly received the information, destination node then can broadcast acknowledgements signal ACK, source node then continues to transmit next new packet after receiving the signal, and otherwise destination node can then broadcast non-acknowledgement signal NACK.Now, the junction network for being deployed in M between transmitting terminal and receiving terminal relaying composition is then participated in the transmitting procedure of the packet according to the reception condition (correctness) of oneself, and the present invention chooses in the relaying being correctly decoded and participates in repeating to transmit to the maximum relaying of destination node signal to noise ratio.
Description
Technical field
It is more particularly to a kind of based on relaying choosing the present invention relates to the relay cooperative transmission agreement in mobile communication technology field
The implementation method of ARQ agreements in SWIPT (simultaneous interpretation of the letter energy) junction network selected.
Background technology
Relay cooperative communication is to utilize the free space diversity (spatial diversity) between distributed single antenna terminal
A kind of available strategy.Due to the NATURAL DISTRIBUTION characteristic of via node in wireless relay network, resource-constrained or large-scale
The performance of wireless communication system can be significantly improved in junction network.But the data that destination node is sent to when source node successfully solve
During code, now seem unnecessary if relaying again, it is contemplated that relay stages want a part of bandwidth of busy channel, in enhanced
After or be referred to as cooperation ARQ agreements be proposed out, it is desirable to obtain preferable spectrum efficiency.
In the wireless relay network of energy constraint, such as in wireless sensor network, node is commonly provided with fixed energy
Feedway, for example, battery.In this way, in charging or changing the inconvenient scene of battery, the life time of junction network is just
It can be restricted.From natural environment, such as solar energy, wind energy collect energy and new energy supply side are provided to junction network
Formula.Except these conventional energy, collection energy has attracted increasing attention from radiofrequency signal, because the energy collected
It is how many easily controllable.Based on letter can simultaneous interpretation communication concept, while information and energy transmission be suggested.Then, two kinds of practicalities
Receiver structure be designed out, be called time-switching (TS) structure and power distribution (PS) structure respectively.Letter can simultaneous interpretation
Communication has naturally been applied to junction network, and via node is collected from the radiofrequency signal of source node in junction network
The information of source node is simultaneously transmitted to destination node by energy using the energy being collected into.So, selection is one or more suitable
Via node is very important for the performance for improving system.But for the junction network of energy constraint, it is most to grind
Study carefully and all concentrate on the situation that via node collects energy, it is up to the present, also not wireless exclusively for the SWIPT with feedback information
The relay selection agreement of junction network design.
The content of the invention
It is an object of the invention to overcome it is above-mentioned in the prior art the defects of, there is provided in the SWIPT based on relay selection
After the implementation method of ARQ agreements in network, compared with conventional transmission mode, this method can effectively improve the performance of system.
To reach above-mentioned purpose, the present invention is achieved by the following technical solutions：
The implementation method of ARQ agreements, comprises the following steps in SWIPT junction networks based on relay selection：
1) in transmitting terminal, via node and the destination node broadcast data to be sent of the source node first into network
Bag, and the feedback information from destination node is waited, feedback information is confirmation ACK or unacknowledged information NACK；
2) in receiving terminal, destination node carries out infomation detection according to the packet received, if infomation detection is correct,
To source node and relay node broadcasts confirmation ACK, if it is not, then to source node and relay node broadcasts unacknowledged information
NACK；
3) in the wireless relay network that the relaying that collection of energy can be carried out by M forms, relaying uses decoding-forwarding
Mode, if relay reception is initialized to the confirmation ACK broadcasted from destination node, that is, wipes one received
Information and the energy being collected into are cut, energy returns to initial value of zero；Otherwise choose in one and go in the relaying being correctly decoded
Row repeats the operation of transmission packet；Wherein, M>1.
Of the invention further improve is, in step 2), in receiving terminal, destination node according to infomation detection correctly with
No, if infomation detection is correct, destination node is then to source node and relay node broadcasts confirmation ACK, and now source node will biography
Defeated next new packet；Otherwise, then participated in source node and relay node broadcasts unacknowledged information NACK into by relaying
Repetition transmission the stage.
Further improve of the invention is, in step 3), if the information that source node and via node receive is non-true
Recognize information NACK, then ARQ agreements are activated, and the specific implementation step of this agreement is as follows：
31) each via node is using the collection of energy pattern based on power dividing framework, each via node
Using identical power dividing ratio, in the network being made up of M via node, via node according to having determined in advance
The information that power dividing ratio ρ is received is decoded, wherein, 0≤ρ≤1；
32) after all relayings after decoding, junction network is divided into two parts, a part be by that can not be correctly decoded in
After the set that composition, another part are made up of the relaying that can be correctly decoded；
33) in the set for the relaying composition that can be correctly decoded, relay using the energy of reception as this transmission information
Required energy, choose in the relaying combination that can be correctly decoded, the instantaneous signal-to-noise ratio maximum of via node to destination node
Via node participates in transmitting procedure again, and it is 1 to provide again the number of transmissions herein, that is, the relaying chosen can only repeat transmission one
It is secondary, if hereafter destination node is still unable to properly receive, packet now is abandoned, source node then starts next new data
The transmission of bag.
Of the invention further improve be, if the junction network without the relaying that can be correctly decoded, not in
After the transmitting procedure again of participation.
Relative to prior art, the present invention has the following technical effect that：
The implementation method of ARQ agreements in SWIPT junction networks of the invention based on relay selection, this method is using band
There is the communication system of feedback information, namely this information is participated in judge whether to relay according to the feedback information of destination node
In transmission, for traditional junction network transmission, spectrum efficiency can be improved；In addition, under the system, the trunk network of finite energy
Network is collected energy and is transmitted with the energy being collected into, and relaying is autarkic, therefore also avoids the need for changing battery,
Especially in adverse circumstances (poisonous, valley etc.).The two is combined, can both improve the spectrum efficiency of system,
The energy expenditure of system can be reduced.
Brief description of the drawings
Fig. 1 is the flow chart of the implementation method of ARQ agreements in the SWIPT junction networks of the invention based on relay selection；
Fig. 2 is the model framework chart of ARQ Transmission systems in the present invention；
Fig. 3 is the PS Organization Charts of letter energy simultaneous interpretation relaying in the present invention；
Fig. 4 is simulation performance figure in the present invention.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
Assuming that network includes a source node S, a destination node D, and M via node R, hkFor k-th of relaying
The channel condition information of the forward link of node, gkFor the channel condition information of the backward link of k-th of via node.
Referring to Fig. 1 to Fig. 3, the implementation method of ARQ agreements, bag in the SWIPT junction networks of the invention based on relay selection
Include following steps：
1) in transmitting terminal, via node and the destination node broadcast data to be sent of the source node first into network
Bag, and the feedback information from destination node is waited, feedback information is confirmation ACK or unacknowledged information NACK；
2) in receiving terminal, destination node carries out infomation detection according to the packet received, if infomation detection is correct,
To source node and relay node broadcasts confirmation ACK, if it is not, then to source node and relay node broadcasts unacknowledged information
NACK；
3) in the wireless relay network that the relaying that collection of energy can be carried out by M forms, relaying uses decoding-forwarding
Mode, if relay reception is initialized to the confirmation ACK broadcasted from destination node, that is, wipes one received
Information and the energy being collected into are cut, energy returns to initial value of zero；Otherwise the selection one or more in the relaying being correctly decoded
Individual relaying repeat the operation of transmission packet；Wherein, M>1
Wherein, above-mentioned steps 2) in, in receiving terminal, destination node is according to infomation detection correctness, if infomation detection is just
Really, destination node is then to source node and relay node broadcasts confirmation ACK, and now source node will transmit next new data
Bag；Otherwise, then the stage is transmitted into the repetition participated in by relaying to source node and relay node broadcasts unacknowledged information NACK.
Wherein, above-mentioned steps 3) in, if the information that source node and via node receive is unacknowledged information NACK, enter
Row following steps：
Using the ARQ agreements based on relay selection, the determination of the cooperative node specifically includes following steps：
31) each via node is using the collection of energy pattern based on power dividing framework, each via node
Using identical power dividing ratio, in the network being made up of M via node, via node according to having determined in advance
The information that power dividing ratio ρ is received is decoded, wherein, 0≤ρ≤1；Source node is with constant power PsSend information, hair
The signal sent be power normalization s, then the signal that k-th of via node receives with reception energy be respectively：
Wherein, na,rFor the antenna noise of via node, nc,rBaseband signal production is converted into for radiofrequency signal at via node
Raw noise；η is the conversion efficiency of energy collection circuit, might as well be set to 1, T as shown in Figure 2 is the length of a time slot；
32) after all relayings after decoding, junction network is divided into two parts, a part be by that can not be correctly decoded in
After the set that composition, another part are made up of the relaying that can be correctly decoded；
The transmit power of k-th of relaying is in the relaying being successfully decoded
The instantaneous signal-to-noise ratio that k-th is relayed to destination node in the relaying being successfully decoded is
Wherein, σ2 a,dFor the power of antenna noise at purpose node, σ2 c,dBase band is converted into for radiofrequency signal at purpose node
Noise power caused by signal；
33) in the set for the relaying composition that can be correctly decoded, relay using the energy of reception as this transmission information
Required energy, choose in the relaying combination that can be correctly decoded, in the instantaneous signal-to-noise ratio maximum of via node to destination node
Transmitting procedure again is participated in after node, it is 1 to provide again the number of transmissions herein, that is, the relaying chosen can only transmit one again
It is secondary, if hereafter destination node is still unable to properly receive, packet now is abandoned, source node then starts next new data
The transmission of bag.A kind of extreme case is considered, if the junction network is not participated in without the relaying that can be correctly decoded by relaying
Transmitting procedure again.
Emulation experiment and effect analysis
Simulation parameters are：Relay number M=4, the transmission rate R=1bits/sec/Hz of source node, via node
The power that noise is introduced with destination node is all 1/2, channel parameter λsd=λh=λk=1.
Analysis of simulation result, ratio is shunted by the optimal power emulated under obtained different transmit powers, such as following table institute
Show：
The Outage probability of distributed antenna curve proposed by the present invention according to the parameters simulation of upper table, and non-relay section is simulated respectively
Point and source node repeat the Outage probability of distributed antenna curve of transmission, it can be seen that proposing the realization of ARQ agreements in the present invention from Fig. 4
Method can significantly improve the performance of system.
Claims (3)
1. the implementation method of ARQ agreements in the SWIPT junction networks based on relay selection, it is characterised in that comprise the following steps：
1) in transmitting terminal, via node and the destination node broadcast packet to be sent of the source node first into network, and
The feedback information from destination node is waited, feedback information is confirmation ACK or unacknowledged information NACK；
2) in receiving terminal, destination node carries out infomation detection according to the packet received, if infomation detection is correct, to source
Node and relay node broadcasts confirmation ACK, if it is not, then to source node and relay node broadcasts unacknowledged information NACK；
3) in the wireless relay network that the relaying that collection of energy can be carried out by M forms, relaying uses decoding-forwarding side
Formula, if relay reception is initialized to the confirmation ACK broadcasted from destination node, that is, wipes all received
Information and the energy being collected into, energy return to initial value of zero；Otherwise a relaying is chosen in the relaying being correctly decoded to carry out
Repeat the operation of transmission packet；Wherein, M>1；
Specifically, if the information that source node and via node receive is unacknowledged information NACK, ARQ agreements are activated,
The specific implementation step of this agreement is as follows：
31) each via node uses using the collection of energy pattern based on power dividing framework, each via node
Identical power dividing ratio, in the network being made up of M via node, via node is according to the power having determined in advance
Shunting ratio ρ decodes to the information received, wherein, 0≤ρ≤1；
32) after all relaying is after decoding, junction network is divided into two parts, and a part is the relaying group by that can not be correctly decoded
Into the set that another part is made up of the relaying that can be correctly decoded；
33) in the set for the relaying composition that can be correctly decoded, relay using the energy of reception as needed for this transmission information
Energy, choose in the relaying combination that can be correctly decoded, the relaying of the instantaneous signal-to-noise ratio of via node to destination node maximum
Node participates in transmitting procedure again, and it is 1 to provide again the number of transmissions herein, that is, the relaying chosen can only repeat transmission primaries,
If hereafter destination node is still unable to properly receive, packet now is abandoned, source node then starts next new packet
Transmission.
2. the implementation method of ARQ agreements in the SWIPT junction networks according to claim 1 based on relay selection, it is special
Sign is, in step 2), in receiving terminal, destination node is according to infomation detection correctness, if infomation detection is correct, destination node
Then to source node and relay node broadcasts confirmation ACK, now source node will transmit next new packet；Otherwise, then
To source node and relay node broadcasts unacknowledged information NACK, the stage is transmitted into the repetition participated in by relaying.
3. the implementation method of ARQ agreements in the SWIPT junction networks according to claim 1 based on relay selection, it is special
Sign is, if the junction network without the relaying that can be correctly decoded, the transmitting procedure again not participated in by relaying.
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| CN105611633B (en) * | 2015-10-23 | 2019-01-04 | 哈尔滨工业大学 | The receiver resources distribution method of beam form-endowing method based on SWIPT |
| WO2018098621A1 (en) * | 2016-11-29 | 2018-06-07 | 华为技术有限公司 | Communication method and device |
| CN107733589B (en) * | 2017-09-29 | 2021-03-02 | 上海金卓科技有限公司 | Method, device, equipment and storage medium for realizing automatic retransmission request of ad hoc network |
| CN110167204B (en) * | 2019-05-08 | 2020-05-19 | 燕山大学 | Relay transmission strategy selection and power distribution method based on MS-BAS algorithm |
| CN110446186B (en) * | 2019-08-07 | 2022-04-29 | 长安大学 | Physical layer secure communication method based on SWIPT in Internet of vehicles |
| CN111404585B (en) * | 2020-03-22 | 2021-04-27 | 隋缘 | Energy cache transmission method based on instantaneous channel state information estimation |
| CN111629419B (en) * | 2020-04-27 | 2022-04-08 | 扬州大学 | Transmission method suitable for AF relay system |
| CN111641992B (en) * | 2020-05-29 | 2023-07-28 | 河南科技大学 | Incremental cooperative communication transmission protocol based on multiple relays in WBAN |
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| CN101868030A (en) * | 2010-05-25 | 2010-10-20 | 华南理工大学 | Distributed wireless network wireless resource distribution method |
| CN102438326A (en) * | 2011-10-14 | 2012-05-02 | 北京航空航天大学 | Multi-rate adaptive cooperative access method and system |
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| 协作通信中继选择方案及ARQ联合优化研究;徐元泉;《中国优秀硕士学位论文全文数据库（信息科技辑）》;20120415(第4期);全文 * |
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