CN108966308A - A kind of D2D communication relay selection method based on outage probability - Google Patents
A kind of D2D communication relay selection method based on outage probability Download PDFInfo
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- CN108966308A CN108966308A CN201810966070.0A CN201810966070A CN108966308A CN 108966308 A CN108966308 A CN 108966308A CN 201810966070 A CN201810966070 A CN 201810966070A CN 108966308 A CN108966308 A CN 108966308A
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- 238000004891 communication Methods 0.000 title claims abstract description 31
- 238000010187 selection method Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 3
- 230000037361 pathway Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/12—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
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Abstract
The D2D communication relay selection method based on outage probability that the present invention relates to a kind of, belongs to D2D communication relay selection technique field.The present invention is for interruption situation caused by relay selection, a kind of D2D communication relay selection method is proposed based on D2D communication interruption probability, pass through the reliability and degree of belief for considering to communicate between user, the priori data amount and channel gain of trunk subscriber, determine candidate relay set, finally by the size for respectively relaying impact factor in judgement set, optimal relay node is obtained.Compared with prior art, the present invention largely improving the handling capacity of system, the complexity of system-computed is reduced significantly, while reducing the outage probability between communication.
Description
Technical field
The D2D communication relay selection method based on outage probability that the present invention relates to a kind of belongs to D2D communication relay selection skill
Art field.
Background technique
At present in D2D communication relay selection technique, traditional relaying technique based on distance is generally used, but it is this
Technology has a larger drawback, is easy to appear the excessive problem of outage probability, and the efficiency of transmission of this communication means also compares
Low, the complexity of system-computed is also higher, while the exchange of a large amount of social informations between node increases information content and system letter
Enable expense.
Summary of the invention
The technical problem to be solved by the present invention is the present invention is directed to the limitation and deficiency of the prior art, one kind is provided and is based on
The D2D communication relay selection method of outage probability, it is little with the probability for solving to communicate Successful transmissions in existing communication interconnection technique,
The problems such as efficiency of transmission is not high at the same time, and outage probability is larger.
The technical scheme is that a kind of D2D communication relay selection method based on outage probability, the method are specific
The following steps are included:
Step1: there are two D2D equipment, since bad channel quality needs to complete to communicate by the auxiliary of relaying, purpose
User issues to base station and requests, and the content marked as M, base station determines the source user for sending data by detection；
Step2: data volume, that is, prior probability α that base station is sent according to the contained source user of trunk subscriber itselfrd, judge elder generation
Test whether probability is greater than given threshold αthr, determine a relay candidate collection A；
Step3: the corresponding channel information sent by source user and destination node judges channel gain hiIt is whether big
In setting threshold value hthr, determine a relay candidate collection B；
Step4: relay candidate collection A is merged with relay candidate collection B, will exist simultaneously the relaying in A, B two set
Node forms a new set H=A ∩ B；
Step5: whether trunk subscriber is ready that the power for consuming itself carries out data transmission depending on relaying as relaying
The degree of belief of user and source user, use λsrIndicate its social networks degree of belief, and λsr∈ [0,1], it is assumed that the relaying of base station sets
Initial power is Pr, then trunk subscriber is ready that the transimission power of contribution is λsrPr；
Step6: considering that the outage probability that the trunk subscriber of selection is required to make D2D to communicate reaches minimum, is protected with this
The quality and performance for demonstrate,proving communication, set an interruption impact factor, calculate the relay node in Candidate Set H according to formula (1)
Interrupt impact factor β:
Wherein PcIndicate the power of phone user, PrIndicate the relaying initial power of base station sets, PsIndicate the function of source user
Rate, γthFor the SINR threshold value of D2D transmitting terminal to relay node and relay node to the receiving end D2D, to each in set H
The impact factor of candidate relay is ranked up, and the smallest influence factor value is optimal relay node.
In the step Step1, purpose user is the equipment for needing data, and source user is with purpose user requested data
A side.
In the step Step2, when source user transfers data to purpose user by relaying, trunk subscriber itself can contain
Some required data, uses α hereinrdIt is sent always to indicate that data volume contained by the potential trunk subscriber of base station statistics accounts for source user
The ratio of data volume, the α of trunk subscriberrdIt is bigger, then show that the trunk subscriber is more suitable.
In the step Step2, a threshold alpha is setthrDetermine a relay candidate set A, relaying in set
User is all satisfied αrd≥αthr。
In the step Step3, hiFor the minimum value of physical pathway channel gain, setting threshold value is hthr, expression formula is public affairs
Formula (2), wherein C=hsd(1+hsdγ), hsdFor the channel gain between D2D equipment, γ is the SINR of the receiving end D2D；
Pass through setting threshold value h in the step Step3thrDetermine a relay candidate collection B, the trunk subscriber in set
It is all satisfied hi≥hthr。
In the step Step4, the intersection of set A, B is found out, obtains a new set H, the relaying element in set H
Meet αrd≥αthrAnd hi≥hthr。
In the step Step6, the outage probability formula (3) for interrupting D2D communication when impact factor β is relayed by selection is pushed away
Export:
Wherein PcIndicate the power of phone user, PrIndicate the relaying initial power of base station sets, PsIndicate the function of source user
Rate, γthSINR threshold value for D2D transmitting terminal to relay node and relay node to the receiving end D2D, λsrIndicate that its social activity is closed
It is degree of belief.
The beneficial effects of the present invention are:
The present invention can effectively increase the handling capacity of system, reduce the complexity of system-computed significantly, reduce logical
The outage probability of letter, while D2D communication life span is greatly improved, the propagation performance of communication is improved, can effectively be solved
It is easy disruption certainly as caused by D2D poor communication channel quality, while releasing the pressure of system, core net is effectively relieved
The shunting of data is realized in the load of network.
Detailed description of the invention
Fig. 1 is the flow chart in the present invention.
Specific embodiment
Embodiment 1: as shown in Figure 1, a kind of D2D communication relay selection method based on outage probability, the method are specific
The following steps are included:
Step1: there are two D2D equipment, since bad channel quality needs to complete to communicate by the auxiliary of relaying, purpose
User issues to base station and requests, and the content marked as M, base station determines the source user for sending data by detection；
Step2: data volume, that is, prior probability α that base station is sent according to the contained source user of trunk subscriber itselfrd, judge elder generation
Test whether probability is greater than given threshold αthr, determine a relay candidate collection A；
Step3: the corresponding channel information sent by source user and destination node judges channel gain hiIt is whether big
In setting threshold value hthr, determine a relay candidate collection B；
Step4: relay candidate collection A is merged with relay candidate collection B, will exist simultaneously the relaying in A, B two set
Node forms a new set H=A ∩ B；
Step5: whether trunk subscriber is ready that the power for consuming itself carries out data transmission depending on relaying as relaying
The degree of belief of user and source user, use λsrIndicate its social networks degree of belief, and λsr∈ [0,1], it is assumed that the relaying of base station sets
Initial power is Pr, then trunk subscriber is ready that the transimission power of contribution is λsrPr；
Step6: considering that the outage probability that the trunk subscriber of selection is required to make D2D to communicate reaches minimum, is protected with this
The quality and performance for demonstrate,proving communication, set an interruption impact factor, calculate the relay node in Candidate Set H according to formula (1)
Interrupt impact factor β:
Wherein PcIndicate the power of phone user, PrIndicate the relaying initial power of base station sets, PsIndicate the function of source user
Rate, γthFor the SINR threshold value of D2D transmitting terminal to relay node and relay node to the receiving end D2D, to each in set H
The impact factor of candidate relay is ranked up, and the smallest influence factor value is optimal relay node.
Further, in the step Step1, purpose user is the equipment for needing data, and source user is to use with purpose
One side of data needed for family.
Further, in the step Step2, when source user transfers data to purpose user by relaying, relaying is used
Family itself can contain some required data, use α hereinrdTo indicate that data volume contained by the potential trunk subscriber of base station statistics accounts for source
User sends the ratio of total amount of data, the α of trunk subscriberrdIt is bigger, then show that the trunk subscriber is more suitable.
Further, in the step Step2, a threshold alpha is setthrIt determines a relay candidate set A, collects
Trunk subscriber in conjunction is all satisfied αrd≥αthr。
Further, in the step Step3, hiFor the minimum value of physical pathway channel gain, setting threshold value is hthr,
Expression formula is formula (2), wherein C=hsd(1+hsdγ), hsdFor the channel gain between D2D equipment, γ is the receiving end D2D
SINR；
Pass through setting threshold value h in the step Step3thrDetermine a relay candidate collection B, the trunk subscriber in set
It is all satisfied hi≥hthr。
Further, in the step Step4, the intersection of set A, B is found out, obtains a new set H, in set H
Relaying element meet αrd≥αthrAnd hi≥hthr。
Further, in the step Step6, the outage probability of D2D communication when impact factor β is relayed by selection is interrupted
Formula (3) is derived:
Wherein PcIndicate the power of phone user, PrIndicate the relaying initial power of base station sets, PsIndicate the function of source user
Rate, γthSINR threshold value for D2D transmitting terminal to relay node and relay node to the receiving end D2D, λsrIndicate that its social activity is closed
It is degree of belief.
Above in conjunction with attached drawing, the embodiment of the present invention is explained in detail, but the present invention is not limited to above-mentioned
Embodiment within the knowledge of a person skilled in the art can also be before not departing from present inventive concept
Put that various changes can be made.
Claims (8)
1. a kind of D2D communication relay selection method based on outage probability, it is characterised in that: the method specifically includes following step
It is rapid:
Step1: there are two D2D equipment, since bad channel quality needs to complete to communicate by the auxiliary of relaying, purpose user
It issues and requests to base station, the content marked as M, base station determines the source user for sending data by detection；
Step2: data volume, that is, prior probability α that base station is sent according to the contained source user of trunk subscriber itselfrd, judge that priori is general
Whether rate is greater than given threshold αthr, determine a relay candidate collection A；
Step3: the corresponding channel information sent by source user and destination node judges channel gain hiWhether it is greater than and sets
Set threshold value hthr, determine a relay candidate collection B；
Step4: relay candidate collection A is merged with relay candidate collection B, will exist simultaneously the relay node in A, B two set
Form a new set H=A ∩ B；
Step5: whether trunk subscriber is ready that the power for consuming itself carries out data transmission depending on trunk subscriber as relaying
With the degree of belief of source user, λ is usedsrIndicate its social networks degree of belief, and λsr∈ [0,1], it is assumed that the relaying of base station sets is initial
Power is Pr, then trunk subscriber is ready that the transimission power of contribution is λsrPr；
Step6: considering that the outage probability that the trunk subscriber of selection is required to make D2D to communicate reaches minimum, guarantees to lead to this
The quality and performance of letter set an interruption impact factor, and the interruption of the relay node in Candidate Set H is calculated according to formula (1)
Impact factor β:
Wherein PcIndicate the power of phone user, PrIndicate the relaying initial power of base station sets, PsIndicate the power of source user,
γthIt is candidate to each in set H for the SINR threshold value of D2D transmitting terminal to relay node and relay node to the receiving end D2D
The impact factor of relaying is ranked up, and the smallest influence factor value is optimal relay node.
2. the D2D communication relay selection method according to claim 1 based on outage probability, it is characterised in that: the step
In rapid Step1, purpose user is the equipment for needing data, and source user is the side with purpose user requested data.
3. the D2D communication relay selection method according to claim 1 based on outage probability, it is characterised in that: the step
In rapid Step2, when source user transfers data to purpose user by relaying, trunk subscriber itself can contain number needed for some
According to using α hereinrdCome indicate base station statistics potential trunk subscriber contained by data volume account for source user send total amount of data ratio,
The α of trunk subscriberrdIt is bigger, then show that the trunk subscriber is more suitable.
4. the D2D communication relay selection method according to claim 3 based on outage probability, it is characterised in that: the step
In rapid Step2, a threshold alpha is setthrTo determine that a relay candidate set A, the trunk subscriber in set are all satisfied αrd≥
αthr。
5. the D2D communication relay selection method according to claim 1 based on outage probability, it is characterised in that: the step
In rapid Step3, hiFor the minimum value of physical pathway channel gain, setting threshold value is hthr, expression formula is formula (2), wherein C=
hsd(1+hsdγ), hsdFor the channel gain between D2D equipment, γ is the SINR of the receiving end D2D；
6. the D2D communication relay selection method according to claim 1 based on outage probability, it is characterised in that: the step
Pass through setting threshold value h in rapid Step3thrDetermine that a relay candidate collection B, the trunk subscriber in set are all satisfied hi≥hthr。
7. the D2D communication relay selection method according to claim 3 based on outage probability, it is characterised in that: the step
In rapid Step4, the intersection of set A, B is found out, show that a new set H, the relaying element in set H meet αrd≥αthrAnd
hi≥hthr。
8. the D2D communication relay selection method according to claim 1 based on outage probability, it is characterised in that: the step
In rapid Step6, the outage probability formula (3) for interrupting D2D communication when impact factor β is relayed by selection is derived:
Wherein PcIndicate the power of phone user, PrIndicate the relaying initial power of base station sets, PsIndicate the power of source user,
γthSINR threshold value for D2D transmitting terminal to relay node and relay node to the receiving end D2D, λsrIndicate that its social networks is believed
Ren Du.
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| CN113923745A (en) * | 2021-10-15 | 2022-01-11 | 国网湖南省电力有限公司 | Communication relay selection method of power communication system and communication method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110198531A (en) * | 2019-05-24 | 2019-09-03 | 吉林大学 | A kind of dynamic D2D relay selection method based on relative velocity |
| CN110198531B (en) * | 2019-05-24 | 2021-04-06 | 吉林大学 | Dynamic D2D relay selection method based on relative speed |
| CN112152821A (en) * | 2020-09-23 | 2020-12-29 | 青岛海尔科技有限公司 | Directional communication method and device, storage medium and electronic equipment |
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