CN104539403B - Implementation method based on ARQ agreements in the SWIPT junction networks relayed more - Google Patents
Implementation method based on ARQ agreements in the SWIPT junction networks relayed more Download PDFInfo
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- CN104539403B CN104539403B CN201410798696.7A CN201410798696A CN104539403B CN 104539403 B CN104539403 B CN 104539403B CN 201410798696 A CN201410798696 A CN 201410798696A CN 104539403 B CN104539403 B CN 104539403B
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Abstract
The invention discloses a kind of implementation method based on ARQ agreements in the SWIPT junction networks relayed more, 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 relaying being correctly decoded carries out the transmission again of packet according to two kinds of Merge Scenarioses of the present invention.
Description
Technical field
It is more particularly to a kind of based on more relayings the present invention relates to the relay cooperative transmission agreement in mobile communication technology field
SWIPT (letter can simultaneous interpretation) junction network in ARQ agreements implementation method.
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 based on relay more SWIPT relaying
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：
Based on the implementation method of ARQ agreements in the SWIPT junction networks relayed more, comprise the 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, if destination node is correct according to the packet progress infomation detection infomation detection received,
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 from mesh node broadcasts, that is, wipes all received
Information and the energy being collected into (energy returns to initial value of zero)；Otherwise multiple relayings are chosen in the relaying being correctly decoded to carry out
Again the operation of transmission packet；Wherein, M>1；
If the information that source node and via node receive is NACK, following steps are carried out：
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, in the relaying combination being correctly decoded, all via nodes are involved in transmitting procedure again, and relaying will successively
The packet being correctly decoded is sent to destination node, transmission every time will take a time slot, provide that the number of transmissions is again herein
1, that is, in the combination of the relaying chosen each relaying can only transmission primaries again, if hereafter destination node is still unable to properly receive,
Packet now is abandoned, source node then starts the transmission of next new packet, and destination node then carries out waiting gain mode
Merge or high specific mode merges.
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
The transmission stage again.
Further improve of the invention is, in step 3), if the junction network does not have without the relaying that can be correctly decoded
There is the transmitting procedure again participated in by relaying.
Relative to prior art, the present invention has the following technical effect that：
The implementation method based on ARQ agreements in the SWIPT junction networks relayed more of the invention, this method using with
The communication system of feedback information, namely just judge whether that relaying participates in this information and passed according to the feedback information of destination node
In defeated, with traditional junction network using etc. gain mode merge or for high specific mode merges, spectrum efficiency can be improved；
In addition, under the system, the junction network of finite energy is collected energy and is simultaneously transmitted with the energy being collected into, relaying be it is self-supporting from
Sufficient formula, therefore also avoid the need for changing battery, especially in adverse circumstances (poisonous, valley etc.).
Brief description of the drawings
Fig. 1 is the flow chart of the invention based on the implementation method of ARQ agreements in the SWIPT junction networks relayed more；
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 forward link of k-th of via node.
Referring to Fig. 1 to Fig. 3, the implementation method of the invention based on ARQ agreements in the SWIPT junction networks relayed more, including
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, if destination node is correct according to the packet progress infomation detection infomation detection received,
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 from mesh node broadcasts, that is, wipes all received
Information and the energy being collected into, energy return to initial value of zero；Otherwise one or more is chosen in the relaying being correctly decoded
Relaying carries out again 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 to source node and relay node broadcasts unacknowledged information NACK, into the transmission stage again participated in by relaying.
Wherein, above-mentioned steps 3) in, if the information that source node and via node receive is unacknowledged information NACK,
ARQ agreements are activated.The specific embodiment of this agreement is as follows：
Following steps are specifically included using based on the ARQ agreements relayed more, the determination of the cooperative node：
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 is s, then the signal that k-th of via node receives with receive energy be respectively：
Ek=η ρ PS|hk|2T/2=ρ PS|hk|2T/2；(η=1)
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
What is be successfully decoded, which is relayed to the instantaneous signal-to-noise ratio of destination node, 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
The power of noise 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, in the relaying combination being correctly decoded, all via nodes are involved in transmitting procedure again, and relaying will successively
The packet being correctly decoded is sent to destination node, transmission every time will take a time slot, provide that the number of transmissions is again herein
1, that is, in the combination of the relaying chosen each relaying can only transmission primaries again, if hereafter destination node is still unable to properly receive,
Packet now is abandoned, source node then starts the transmission of next new packet.The relay collection being correctly decoded passes successively
Defeated information, it is mutually orthogonal, as shown in Fig. 2 destination node then carries out waiting gain mode (EGC) merging or high specific mode (MRC)
Merge, this is a kind of two Merge Scenarioses of agreement.Consider a kind of extreme case, if what the junction network can be correctly decoded
Relaying, the then transmitting procedure again not participated in by relaying.
Merge according to EGC, then the signal to noise ratio of destination node is
Merge according to MRC, then the signal to noise ratio of destination node is
M is the relaying number being correctly decoded in once transmitting；
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：
| Transmit power/dB | 1 | 3 | 5 | 7 | 9 | 11 | 13 | 15 |
| Optimal power split ratio (waits gain) | 0.51 | 0.55 | 0.57 | 0.59 | 0.59 | 0.63 | 0.63 | 0.63 |
| Optimal power split ratio (high specific) | 0.49 | 0.53 | 0.55 | 0.55 | 0.59 | 0.59 | 0.59 | 0.61 |
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
The performance curve of method will be substantially better than above-mentioned two situations, and performance is improved, and two in the present invention kind Merge Scenarios
It is more or less the same, but equal gain combining is easier than maximum-ratio combing in realization.
Claims (3)
1. the implementation method based on ARQ agreements in the SWIPT junction networks relayed more, 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 via node that collection of energy can be carried out by M forms, via node use decoding-
Pass-through mode, if via node receives the confirmation ACK from destination node broadcast, initialized, i.e. erasing connects
All information received and the energy being collected into, energy return to initial value of zero；Otherwise selected in the via node being correctly decoded
Multiple via nodes are taken to carry out again the operation of transmission packet；Wherein, M>1；
If the information that source node and via node receive is NACK, following steps are carried out：
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 whole via nodes after decoding, junction network is divided into two parts, a part be by that can not be correctly decoded in
Formed after node, the set that another part is made up of the via node that can be correctly decoded；
33) in the set for the via node composition that can be correctly decoded, via node is sent the energy of reception as this
Energy needed for information, in the via node combination being correctly decoded, all via nodes are involved in transmitting procedure again, in
The packet being correctly decoded will be sent to destination node successively after node, transmission every time will take a time slot, herein regulation weight
New the number of transmissions is 1, that is, each via node chosen can only transmission primaries again, if hereafter destination node still can not correctly connect
Receive, then abandon packet now, source node then starts the transmission of next new packet, and destination node then carries out waiting gain
Mode merges or high specific mode merges.
2. the implementation method according to claim 1 based on ARQ agreements in the SWIPT junction networks relayed more, its feature
It is, in step 2), in receiving terminal, destination node is according to infomation detection correctness, if infomation detection is correct, destination node is 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, into the transmission stage again participated in by via node.
3. the implementation method according to claim 1 based on ARQ agreements in the SWIPT junction networks relayed more, its feature
It is, in step 3), if the junction network is not participated in again without the via node that can be correctly decoded by via node
Transmitting procedure.
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| CN105307271B (en) * | 2015-11-02 | 2019-05-21 | 江苏科技大学 | Throughput-maximized multiple antenna communication circulating energy acquisition method |
| CN107911150B (en) * | 2017-11-10 | 2020-10-09 | 广州大学 | Wireless energy-carrying cooperative communication method |
| CN109039535B (en) * | 2018-06-26 | 2021-06-18 | 浙江工业大学 | Error control method for energy capture electromagnetic nano network |
| CN110099386B (en) * | 2019-04-16 | 2020-12-29 | 中国地质大学（武汉） | Wireless relay method independent of non-causal information in cognitive network |
| CN116669098A (en) * | 2020-01-03 | 2023-08-29 | 大唐移动通信设备有限公司 | Information transmission method, terminal and network equipment |
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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 |
| CN102333368A (en) * | 2011-06-13 | 2012-01-25 | 西安交通大学 | Nonlinear amplification-retransmission optimal power allocation 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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| CN101868030A (en) * | 2010-05-25 | 2010-10-20 | 华南理工大学 | Distributed wireless network wireless resource distribution method |
| CN102333368A (en) * | 2011-06-13 | 2012-01-25 | 西安交通大学 | Nonlinear amplification-retransmission optimal power allocation 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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