CN108650661A - A kind of equipment direct communication multiplexer mode selection method - Google Patents
A kind of equipment direct communication multiplexer mode selection method Download PDFInfo
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- CN108650661A CN108650661A CN201810247621.8A CN201810247621A CN108650661A CN 108650661 A CN108650661 A CN 108650661A CN 201810247621 A CN201810247621 A CN 201810247621A CN 108650661 A CN108650661 A CN 108650661A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
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Abstract
The present invention relates to a kind of equipment direct communication multiplexer mode selection methods, including：S1, under many-one multiplexer mode, calculate meet cellular subscriber communications quality D2D user's transmitting terminal and base station the second reference distance r2, and meet the phone user of D2D user communication qualities being re-used and the first reference distance r of D2D user's receiving terminal1；S2, under one-to-one multiplexer mode, calculate meet cellular subscriber communications quality D2D user's transmitting terminal and base station the 4th reference distance r4, and meet the phone user of D2D user communication qualities being re-used and the third reference distance r of D2D user's receiving terminal3；S3, according to the second reference distance r2With the 4th reference distance r4Determine D2D user to multiplexer mode；According to the first reference distance r1With third reference distance r3Select the phone user being re-used.The present invention not only can guarantee the communication quality of D2D communication and cellular communication, but also D2D users more as possible can be made to be successfully established communication in frequency spectrum resource shortage, improve handling capacity and frequency spectrum resource utilization rate.
Description
Technical field
The present invention relates to the 5th generation (5G) technical field of mobile terminals, more specifically to a kind of equipment direct communication
Multiplexer mode selection method.
Background technology
With the development of wireless communication technique, the quickly universal of intelligent terminal, mobile Internet business become increasingly abundant with
And the explosive growth of network communication capacity, more and more different types of mobile terminals are linked into wireless network.It is huge
Volume of transmitted data and abundant business, on the one hand cause base station in cellular communications networks to bear increasingly heavier, frequency spectrum money
Source shortage problem is more serious；On the other hand the end-user experience for exciting more rich communication pattern demand and thus bringing
Promotion and cellular communications applications extension.Therefore, mobile communication transmission underspeed, frequency spectrum resource be rare, user experience
There is an urgent need for promoted and for a large number of users wireless resource management, become the significant challenge that mobile communication faces, the nothing towards 5G
The evolution demand of line communication technology is very urgent.
As the crucial candidate technologies towards 5G, it is a kind of work that equipment, which leads directly to (Device-to-Device, D2D) technology,
In authorized frequency bands, in the case where base station controls, adjacent terminals is allowed to carry out the new technique of direct communication using cell resource.Two
When the mobile device of direct communication is communicated, the control signaling between user, the data service between them are only responsible in base station
Base station conversion is not needed, the direct communication of device-to-device may be implemented, thus the burden of base station side can be reduced.Due to user
Between distance it is closer, compared to for traditional cellular communication (needing to convert by base station), not only decaying greatly reduces, and user is whole
The transmission power at end is greatly reduced, so as to save the electricity of user terminal.D2D communication users are operated in cellular system
In, it uses cellular system Central Plains to have the resource of user, the shortage of radio resource can be alleviated in this way, improve the frequency spectrum of system
Efficiency and the capacity for increasing system.
Although the D2D communication technologys have many advantages, such as, terminal direct connection technology is introduced in cellular networks, is needed terminal
Direct communication is effectively combined with cellular communication.Therefore there are many operating modes for D2D communications, such as honeycomb mode, orthogonal mode
Formula and multiplexer mode.In order to save frequency spectrum resource, improve efficiency of frequency employment, D2D communications mostly use multiplex mode and honeycomb greatly
Users to share resource, this just necessarily brings interference to entire cell.In order to avoid mutual relevant between D2D communications and cellular communication
Disturb, more effectively improve the performances of D2D communication systems, need to D2D communication systems in cellular network carry out rational multiplexing and
Resource allocation.
Multiplexer mode can be divided into two kinds：One is a D2D to being multiplexed a phone user, and another kind is multiple D2D
To being multiplexed phone user's resource.It is one-to-one multiplexing be D2D communication base scene, interfere with each other it is relatively simple, convenient for control
System；But when cellular network load is bigger, the resource that can be multiplexed is limited, if using one-to-one multiplex mode,
Only limited a D2D is to that can be multiplexed the resource of phone user, so limited to the raising of frequency spectrum resource utilization ratio.Many-one
Multiplexing can effective solution one-to-one multiplexing when, D2D can allow more D2D to communicating to accessing limited problem
And then improve frequency spectrum resource utilization rate.But when carrying out many-one multiplexing, multiple D2D are interfered caused by phone user
It can be bigger.More D2D users how are allowed to be multiplexed communication quality of the resource of phone user without influencing phone user, it can root
When being in different location according to user in network, different user can select different multiplexer modes, i.e. multiplexer mode to select, and be
D2D Communication Jammings coordinate the major issue of radio resource allocation.
Invention content
The technical problem to be solved in the present invention is do not have concrete condition for the above-mentioned single multiplex mode of the prior art
Concrete analysis there are problems that can not making cellular system handling capacity and the availability of frequency spectrum to be highly improved defect, provide one kind
Equipment direct communication multiplexer mode selection method.
The technical solution adopted by the present invention to solve the technical problems is：Construct a kind of equipment direct communication multiplexer mode choosing
Selection method includes the following steps：
S1, under many-one multiplexer mode, calculate the D2D user transmitting terminal for meeting cellular subscriber communications quality and base station
Second reference distance r2, and meet the phone user being re-used and the first of D2D user's receiving terminal of D2D user communication qualities
Reference distance r1；Wherein, the many-one multiplexer mode is multipair D2D user to being multiplexed phone user's resource；
S2, under one-to-one multiplexer mode, calculate the D2D user transmitting terminal for meeting cellular subscriber communications quality and base station
4th reference distance r4, and meet the third of the phone user being re-used and D2D user's receiving terminal of D2D user communication qualities
Reference distance r3；Wherein, a pair of multiplexer mode is a pair of of D2D user to being multiplexed phone user's resource；
S3, according to the second reference distance r2With the 4th reference distance r4Determine the multiplexer mode of D2D user couple；And root
According to the first reference distance r1With third reference distance r3The phone user being re-used is selected to be multiplexed.
Preferably, the step S1 includes：
S1-1, under many-one multiplexer mode, according to the snr threshold of the second signal-to-noise ratio formula and base station, be calculated
The second reference distance r2。
Preferably, the step S1 includes：
S1-2, under many-one multiplexer mode, according to the signal-to-noise ratio threshold of the first signal-to-noise ratio formula and D2D user's receiving terminal
Value, is calculated the first reference distance r1。
Preferably, the step S2 includes：
S2-1, under one-to-one multiplexer mode, according to the snr threshold of the 4th signal-to-noise ratio formula and base station, be calculated
The 4th reference distance r4。
Preferably, the step S2 includes：
S2-2, under one-to-one multiplexer mode, according to the signal-to-noise ratio threshold of third signal-to-noise ratio formula and D2D user's receiving terminal
Value, is calculated the third reference distance r3。
Preferably, include before the step S3：
Obtain the first measured distance and the phone user and the second of D2D user's receiving terminal of D2D user's transmitting terminal and base station
Measured distance.
Preferably, the step S3 includes：
S3-1, by first measured distance and the second reference distance r2, the 4th reference distance r4With default half
Diameter rthIt is compared respectively；
If S3-2, first measured distance meet the first preset condition, many-one multiplexer mode is selected；If described
One measured distance meets the second preset condition, then selects one-to-one multiplexer mode；
Wherein, first preset condition is：Second reference distance r2≤ the first measured distance ＜ pre-set radius rth, described
Second preset condition is：4th reference distance r4≤ the first the second reference distances of measured distance ＜ r2；The pre-set radius rthFor
Base station can overlay area maximum radius.
Preferably, the step S3 includes：
S31, under many-one multiplexer mode, judge the second measured distance of the phone user and D2D user's receiving terminal
Whether the first reference distance r is greater than or equal to1；
If the second measured distance of S32, the phone user and D2D user's receiving terminal are greater than or equal to described first and refer to
Distance r1, phone user corresponding with second measured distance is selected to be multiplexed as the phone user being re-used.
Preferably, the step S3 includes：
S33, under one-to-one multiplexer mode, judge the second measured distance of the phone user and D2D user's receiving terminal
Whether the third reference distance r is greater than or equal to3；
If S34, the phone user and the second measured distance of D2D user's receiving terminal are referred to more than or equal to the third
Distance r3, phone user corresponding with second measured distance is selected to be multiplexed as the phone user being utilized.
The equipment direct communication multiplexer mode selection method for implementing the present invention, has the advantages that：The present invention uses
D2D user determines the multiplexing mould of D2D user to the ascending resource for being multiplexed phone user according to D2D user at a distance from base station
Formula both can guarantee to be D2D user to selecting flexible multiplexer mode, and multiplexer mode selection method using the present invention
D2D communicates the communication quality with cellular communication, and D2D users more as possible can be made successfully to build in the case of frequency spectrum resource shortage
Vertical communication, and then improve the handling capacity of system and the utilization rate of frequency spectrum resource.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing：
Fig. 1 is a kind of flow diagram of equipment direct communication multiplexer mode selection method provided in an embodiment of the present invention；
Fig. 2 is the first reference distance r1, the second reference distance r2, third reference distance r3With the 4th reference distance r4Position
Set schematic diagram.
Specific implementation mode
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control attached drawing is described in detail
The specific implementation mode of the present invention.
With reference to figure 1, Fig. 1 is a kind of flow of equipment direct communication multiplexer mode selection method provided in an embodiment of the present invention
Schematic diagram.
The equipment of the embodiment of the present invention direct communication multiplexer mode selection method includes the following steps：
Step S1, under many-one multiplexer mode, the D2D user's transmitting terminal and base for meeting cellular subscriber communications quality are calculated
The the second reference distance r to stand2, and meet the phone user being re-used and the D2D user's receiving terminal of D2D user communication qualities
First reference distance r1；Wherein, many-one multiplexer mode is multipair D2D user to being multiplexed phone user's resource.
Further, in the equipment direct communication multiplexer mode selection method of the present invention, step S1 includes：
S1-1, under many-one multiplexer mode, according to the snr threshold of the second signal-to-noise ratio formula and base station, be calculated
Second reference distance r2。
It is to be appreciated that the letter device of base station is than the minimum signal-to-noise ratio that threshold value is base station.
Under many-one multiplexer mode, the second signal-to-noise ratio formula is：
It can be calculated according to formula 1.1：
Wherein, JDiM D2D user is indicated to the interference to base station, expression is：PiIndicate the transmission power of i-th of D2D user couple, PL0Indicate path loss, di,BIt is D2DiWith
The measured distance of family transmitting terminal and base station (defined below is the first measured distance)；N0Noise power, α be path loss because
Son, ε are the signal-to-noise ratio of phone userPkIt is the transmission power of phone user, dkIt is that phone user arrives
The distance of base station；M is indicated：When using many-one multiplexer mode, the number of the D2D user couple of many-one multiplexing is carried out, that is, there are M
D2D user is to one phone user's resource of concurrent multiplexing；γcminIt is the minimum signal-to-noise ratio of base station.
Further, step S1 can also include：
S1-2, under many-one multiplexer mode, according to the signal-to-noise ratio threshold of the first signal-to-noise ratio formula and D2D user's receiving terminal
Value, is calculated the first reference distance r1。
It is to be appreciated that the snr threshold of D2D user's receiving terminal is the minimum signal-to-noise ratio of D2D user's receiving terminal.
Under many-one multiplexer mode, in a specific example, enable some D2D user to for D2Di, the first signal-to-noise ratio
Formula is denoted as：
Wherein, JcukThe phone user being multiplexed into is to D2DiInterference, expression is：di,kFor phone user and D2D receiving terminals measured distance (it is defined below be the second actual measurement away from
From)；JiIt is to be multiplexed M-1 D2D user of same phone user's resource to D2DiInterference, expression is：di,jIt is j-th of D2D user to D2DjWith D2DiThe distance of user's receiving terminal, PjIt is M D2D
The transmission power of j-th of D2D user couple, d in user coupleiIt is D2D user's transmitting terminal in i-th of D2D user couple to D2D user
The distance between receiving terminal.
It can be calculated according to formula 1.3：
Wherein, C is the number of phone user, γdminIt is the minimum signal-to-noise ratio of D2D user's receiving terminal.
Step S2, under one-to-one multiplexer mode, the D2D user's transmitting terminal and base for meeting cellular subscriber communications quality are calculated
The 4th reference distance r to stand4, and meet the phone user being re-used and the D2D user's receiving terminal of D2D user communication qualities
Third reference distance r3；Wherein, one-to-one multiplexer mode is a pair of of D2D user to being multiplexed phone user's resource.
Further, in the equipment direct communication multiplexer mode selection method of the present invention, step S2 includes：
S2-1, under one-to-one multiplexer mode, according to the snr threshold of the 4th signal-to-noise ratio formula and base station, be calculated
4th reference distance r4。
It is to be appreciated that under one-to-one multiplexer mode, the snr threshold of base station under many-one multiplexer mode
Threshold value is identical, is the minimum signal-to-noise ratio of base station.
Under the multiplexer mode, the 4th signal-to-noise ratio formula is：
It can be calculated according to formula 1.5：
Wherein, D indicates to carry out the number of the D2D user couple of one-to-one multiplexing.
Further, step S2 can also include：
S2-2, under one-to-one multiplexer mode, according to the signal-to-noise ratio threshold of third signal-to-noise ratio formula and D2D user's receiving terminal
Value, is calculated third reference distance r3。
It is to be appreciated that under one-to-one multiplexer mode, snr threshold and the many-one of D2D user's receiving terminal are multiplexed mould
Snr threshold under formula is identical, is the minimum signal-to-noise ratio of D2D user's receiving terminal.
It should be noted that carrying out the communication of the D2D user couple of one-to-one multiplexer mode, D2D user's phase is not present
Interference between mutually, it is assumed that in one-to-one multiplexing, the third signal-to-noise ratio formula of any one D2D user's receiving terminal is：
It can be calculated according to formula 1.7：
Step S3, according to the second reference distance r2With the 4th reference distance r4Determine the multiplexer mode of D2D user couple；And root
According to the first reference distance r1With third reference distance r3The phone user being re-used is selected to be multiplexed.
Further, include before step S3：Obtain the first measured distance and honeycomb of D2D user's transmitting terminal and base station
The second measured distance of user and D2D user's receiving terminal.It, can be real by the first of D2D user's transmitting terminal and base station by being described above
Ranging is from di,BIt indicates, the second measured distance d of phone user and D2D user's receiving terminali,kIt indicates.
Further, in the step S3 of equipment direct communication multiplexer mode selection method of the invention, according to the second reference
Distance r2With the 4th reference distance r4Determine that the multiplexer mode of D2D user couple may include：
S3-1, by the first measured distance and the second reference distance r2, the 4th reference distance r4With pre-set radius rthPoint
It is not compared；
If S3-2, the first measured distance meet the first preset condition, many-one multiplexer mode is selected；If first actual measurement away from
From the second preset condition is met, then one-to-one multiplexer mode is selected；
Wherein, the first preset condition is：Second reference distance r2≤ the first measured distance ＜ pre-set radius rth, second is default
Condition is：4th reference distance r4≤ the first the second reference distances of measured distance ＜ r2；Pre-set radius rthIt can the area of coverage for base station
The maximum radius in domain.
The side of being disturbed is base station in cellular communication, in order to ensure the communication quality of phone user, the signal-to-noise ratio of base station at this time
Its minimum signal-to-noise ratio need to be greater than or equal to can just ensure bee that is, when the signal-to-noise ratio of base station is greater than or equal to minimum signal-to-noise ratio
The communication quality of nest user, and from aforementioned：The minimum signal-to-noise ratio of base station is γcmin, can determine at this time, to meet honeycomb use
The communication quality at family, at this time the signal-to-noise ratio of base station have to be larger than or equal to its minimum signal-to-noise ratio, so, can be obtained by formula 1.1
：
It can be calculated by formula 2.1 and formula 1.2：
So under many-one multiplexer mode, to meet the communication quality of phone user, D2D user's transmitting terminal and base station
The first measured distance (d i.e. above-mentionedi,B) the second reference distance r need to be greater than or equal to2.So by judging that D2D user sends out
First measured distance d of sending end and base stationi,BWhether the second reference distance r is greater than or equal to2, can determine that D2D user couple can
With the multiplexer mode of use, i.e., the first measured distance d when D2D user's transmitting terminal and base stationi,BMore than or equal to the second reference
Distance r2When, it may be determined that D2D user is many-one multiplexer mode to the multiplexer mode that may be used at this time, i.e., multiple D2D are used
Family is to that can be multiplexed phone user's resource.
It should be noted that as the first measured distance d of D2D user's transmitting terminal and base stationi,BLess than second with reference to away from
From r2When, then it is unsatisfactory for the condition of many-one multiplexing, at this point, the D2D user for being unsatisfactory for many-one multiplexer mode can select one
D2D communications are carried out to one multiplex mode, the mutual interference of D2D user is at this moment not present.
Under one-to-one multiplexer mode, D2D user can cause to do when being multiplexed the frequency spectrum resource of phone user to base station
It disturbs.At this time in order to ensure the communication quality of phone user, the signal-to-noise ratio of base station has to be larger than or equal to its minimum signal-to-noise ratio, i.e. base
The signal-to-noise ratio minimum stood must also reach its minimum signal-to-noise ratio.And it can be obtained according to formula 1.5：
It can be calculated according to formula 2.3 and formula 1.6：
So under one-to-one multiplexer mode, to meet the communication quality of phone user, D2D user's transmitting terminal and base station
The first measured distance (i.e. di,B) the 4th reference distance r need to be greater than or equal to4.So by judge D2D user's transmitting terminal with
First measured distance d of base stationi,BWhether the 4th reference distance r is greater than or equal to4, D2D user can be determined to may be used
Multiplexer mode.I.e. as the first measured distance d of D2D user's transmitting terminal and base stationi,BMore than or equal to the 4th reference distance r4
When, it may be determined that D2D user is one-to-one multiplexer mode to the multiplexer mode that may be used at this time, i.e., a D2D user couple can
To be multiplexed phone user's resource.
Assuming that the radius of cellular cell is rth(pre-set radius r i.e. above-mentionedth), there are 1 base station eNB, K in cell
Phone user (CUE1、CUE2、…、CUEk) and N to D2D user to (D2D1、D2D2、…、D2DN) it is randomly dispersed in cellular cell
Interior, D2D user by being multiplexed phone user's ascending resource to being communicated.Second ginseng can be determined by formula 1.2 and formula 1.6
Examine distance r2More than the 4th reference distance r4, i.e., as the first measured distance di,BMore than or equal to the second reference distance r2When, D2D is used
Family is to selecting many-to-one multiplexer mode, as the first distance di,BMore than or equal to the 4th reference distance r4When, D2D user is to choosing
One-to-one multiplexer mode is selected, however, due to the second reference distance r2More than the 4th reference distance r4, so multiple using many-one
Have to region with the D2D user using one-to-one multiplexer mode with pattern certain Chong Die (as shown in Figure 2).Therefore, in order to
The availability of frequency spectrum being promoted, allowing D2D users more as possible to can preferentially be selected at the frequency spectrum resource of distribution of work phone user, the present invention
Select many-one multiplexer mode, that is to say, that in overlapping region, many-one multiplexer mode possesses multiplexer mode selecting priority.Separately
Outside, as shown in Fig. 2, since the overlayable maximum magnitude in base station is centered on base station, with rthFor the circumference range of maximum radius,
So the second reference distance r2With the 4th reference distance r4Respectively less than pre-set radius rth.It is possible thereby to determine：When second with reference to away from
From r2≤ the first measured distance di,B＜ pre-set radius rthWhen, many-one multiplexer mode just may be used.As the 4th reference distance r4
≤ the first measured distance di,BThe second reference distances of ＜ r2When, select one-to-one multiplexer mode.
In the step S3 of the equipment of the embodiment of the present invention direct communication multiplexer mode selection method, according to first with reference to away from
From r1With third reference distance r3The step of selecting the phone user that is re-used to be multiplexed include：
S31, under many-one multiplexer mode, judge phone user and D2D user's receiving terminal the second measured distance whether
More than or equal to the first reference distance r1。
If S32, phone user and the second measured distance of D2D user's receiving terminal are greater than or equal to the first reference distance r1,
Phone user corresponding with the second measured distance is selected to be multiplexed as the phone user being re-used.
When D2D user is multiplexed using many-one multiplexer mode, it is assumed that be M D2D user to one honeycomb of multiplexing
The frequency spectrum resource of user, at this point, there are other M-1 D2D users to a certain user D2DiThe interference J of user's receiving terminali, bee
Nest user is to D2DiThe interference J of usercukAnd M D2DiUser is to the interference J to base stationDi.According to D2DiUser's receiving terminal
Signal-to-noise ratio minimum value γdminAnd the first signal-to-noise ratio formula, that is, formula 1.3 can obtain：
It can be calculated according to formula 2.5 and formula 1.4：
In order to ensure the communication quality of D2D user it can be seen from formula 2.6, phone user and D2D user's receiving terminal
Second measured distance di,kThe first reference distance r need to be greater than or equal to1.So by judging that phone user receives with D2D user
The second measured distance d at endi,kWhether the first reference distance r is greater than or equal to1, it may be determined that whether phone user can be by D2D
User is multiplexed.I.e. under many-one multiplexer mode, by the second measured distance for judging phone user and D2D user's receiving terminal
di,kWith the first reference distance r1Size can determine the phone user for multiplexing.
Further, in step S3, according to the first reference distance r1With third reference distance r3The honeycomb being re-used is selected to use
The step of family is multiplexed further include：
S33, under one-to-one multiplexer mode, judge phone user and D2D user's receiving terminal the second measured distance whether
More than or equal to third reference distance r3。
If S34, phone user and the second measured distance of D2D user's receiving terminal are greater than or equal to third reference distance r3,
Phone user corresponding with the second measured distance is selected to be multiplexed as the phone user being utilized.
When D2D user is multiplexed using one-to-one multiplexer mode, the mutual interference of D2D user is not present, this
When, according to D2DiThe signal-to-noise ratio minimum value γ of user's receiving terminaldminAnd third signal-to-noise ratio formula, that is, formula 1.7 can obtain：
It can be calculated according to formula 2.7 and formula 1.8：
In order to ensure the communication quality of D2D user it can be seen from formula 2.8, phone user and D2D user's receiving terminal
Second measured distance di,kThird reference distance r need to be greater than or equal to3.So by judging that phone user receives with D2D user
The second measured distance d at endi,kWhether third reference distance r is greater than or equal to3, it may be determined that whether phone user can be by D2D
User is multiplexed.I.e. under one-to-one multiplexer mode, by the second measured distance for judging phone user and D2D user's receiving terminal
di,kWith third reference distance r3Size can determine the phone user for multiplexing.
To sum up, equipment direct communication multiplexer mode selection method of the invention is utilized according to the physical location of D2D user
D2D user determines that D2D is used to the ascending resource for being multiplexed phone user according to the signal-to-noise ratio constraints of D2D receiving terminals and base station
The multiplexer mode selection method at family pair, to be D2D user to selecting flexible multiplexer mode.Moreover, using the present invention multiple
With mode selecting method, the communication quality of D2D user and the communication quality of phone user not only can guarantee, but also can be short in frequency spectrum resource
Make D2D users more as possible to being successfully established communication in the case of lacking, and then improves the handling capacity of system and the profit of frequency spectrum resource
With rate.
The equipment direct communication multiplexer mode selection method of the present invention is illustrated with a specific embodiment below.
Specific configuration is as follows：
In step sl, carry out many-one is calculated according to the snr threshold for being disturbed base station of cellular communication first
D2D user's transmitting terminal of multiplexing needs the required distance met, i.e. the second reference distance r of D2D user's transmitting terminal and base station2,
That is, as long as actual range (first measured distance) of D2D user's transmitting terminal apart from base station is greater than or equal to the second reference
Distance r2, then the communication quality of phone user can be obtained by guarantee.Involved parameter is set in the signal-to-noise ratio formula of base station
It sets as shown in table 1：
Table 1
In step sl, according to the data in table 1, it is assumed that the maximum radius of cell is 500m, has 20 D2D to use in cell
Family pair and 40 phone users, D2D user and phone user are randomly dispersed in cell, and all D2D users are to mutual
The i.e. d of distanceI, jMeet the random distribution between 0-1000m, distance, that is, d of phone user to base stationkMeet between 0-500m
Random distribution.In order to enable more D2D users is to can be carried out many-one multiplexing as possible, first, by 20 D2D users couple
It is divided into one group, one phone user's resource of concurrent multiplexing, and each D2D user is with maximum power Pmax=-20dBm into
Row communication.According to the second signal-to-noise ratio formula, D2D user's transmitting terminal and the second reference distance r of base station can be calculated2=
175.441064292772 rice.The distance is less than the maximum radius r of cellth=500m.That is, 20 D2D users are to same
The frequency spectrum resource of mono- phone user of Shi Fuyong can meet the signal-to-noise ratio requirement of base station, it is ensured that cellular communication quality.
In step sl, under many-one multiplexer mode, according to the first signal-to-noise ratio formula, the honeycomb being re-used can be calculated and used
The first reference distance r at family and D2D user's receiving terminal1.That is, as long as the phone user being re-used and D2D user are to it
Between the second measured distance di,kMore than or equal to the first reference distance r1, D2D communication quality can be obtained by guarantee.
As shown in Fig. 2, in step sl, the position of the phone user being re-used be using D2D user's receiving terminal as the center of circle,
With the first reference distance r1Outside for the circle of radius.In order to obtain more qualified phone users that can be re-used,
Ideally, distance d of the phone user to base stationkIt is the bigger the better, the first reference distance r1It is the smaller the better.Pass through formula
1.4 it can be seen that dkIt is smaller, the first reference distance r1With regard to smaller；dkIt is bigger, the first reference distance r1It is bigger；It follows that dk
With the first reference distance r1It is the relationship mutually restricted, and the maximum radius of cell is 500m, due to the phone user being re-used
It is required that in r1Except and in dkWithin, that is, the second measured distance d of the phone user and D2D receiving terminals that are re-usedi,kBe greater than or
Equal to the first reference distance r1And it is less than d at a distance from base stationk, it is therefore desirable to meet：r1+dk<500m。
In step sl, in order to grasp dkMaximum occurrences, can first take a kind of extreme case, i.e., two phone users are multiple
With the frequency spectrum resource of a phone user and the mutual distance d of the two D2D users coupleI, jMaximum is many-one in principle at this time
Multiplexer mode.Such as：Take dI, j=1000m can obtain dk=52.4m can be calculated according to the first signal-to-noise ratio formula (i.e. formula 1.3)
Go out the first reference distance r1=447.265130218219m, it can thus be seen that at this point, meeting r1+dk<The condition of 500m.
In step sl, according to the data in table 1, assume initially that 20 D2D users to being divided into one group, take dk=52.4m
(maximum occurrences), random distance dI, j=16.9829m, 81.9910m, 120.8596m, 179.4051m, 242.4115m,
284.2965m、360.0904m、381.4465m、414.7134m、495.9598m、529.8834m、590.9446m、
629.7519m、769.0291m、844.8557m、862.7107m、890.7521m、982.3032m、928.3131m.According to
One signal-to-noise ratio formula can calculate the first reference distance r1=31.7055056335015+54.9155466368859i, at this time
r1For plural number, that is to say, that interfering with each other between 20 D2D users couple and the interference of cellular communication are unsatisfactory for D2D user's reception
The signal-to-noise ratio at end constrains, and interferes with each other too greatly, and D2D communications at this time can not carry out.
In step sl, when taking dkWhen=52.4m, the number of the D2D user couple of same phone user's resource can be multiplexed
Fewer, the purpose of many-one multiplexing is exactly in order to make D2D users more as possible to that can carry out many-one multiplexing, according to formula
It can be seen that dkReduce, r1Also reduce, therefore can be by reducing dkTo find suitable first reference distance r1.In this example,
In order to make frequency spectrum resource of 20 D2D users to one phone user of concurrent multiplexing, as reduction dkWhen=0.01, according to the first letter
The first reference distance r can be calculated than formula by making an uproar1=0.00610157425043190+0.0105682366079020i, at this time
R1Still it is plural number.Illustrate that 20 D2D users are too big to interfering with each other for generation, are unable to the money of one phone user of concurrent multiplexing
Source, it is desirable to reduce the D2D user of many-one multiplexing is to number.
In step sl, the number for reducing D2D user couple in grouping can reduce interfering with each other for they, find conjunction to the greatest extent
The first suitable reference distance r1.It should be noted that when reducing D2D user to number, distance is removed as far as possible
Nearest D2D user couple interferes with each other bigger because distance is closer.There are 17 D2D users couple when being reduced in a grouping
When, d is taken at this timek=52.4m has 16 D2D users to generating interference to D2Di, they are d at a distance from D2DiI, j=
179.4051m、242.4115m、284.2965m、360.0904m、381.4465m、414.7134m、495.9598m、
529.8834m、590.9446m、629.7519m、769.0291m、844.8557m、862.7107m、890.7521m、
982.3032m、928.3131m.The first reference distance r can be calculated according to the first signal-to-noise ratio formula1=
616.846293708284m but being unsatisfactory for r at this time1+dk<500m。
In step sl, it is sequentially reduced dk, the r that can meet condition is obtained to the greatest extent1, when thering are 17 D2D to use in a grouping
Family is to being M=17, dkWhen=39m, there are 16 D2D users to generating interference to D2Di, they are d at a distance from D2DiI, j=
179.4051m、242.4115m、284.2965m、360.0904m、381.4465m、414.7134m、495.9598m、
529.8834m、590.9446m、629.7519m、769.0291m、844.8557m、862.7107m、890.7521m、
982.3032m、928.3131m.The first reference distance r can be calculated according to the first signal-to-noise ratio formula1=
459.103157530974m.It can thus be seen that working as M=17, dkWhen=39m, just meet r1+dk<The condition of 500m.
In step sl, when it can be seen from aforementioned calculate as M=20, the first reference distance r1 and phone user to base
The distance d to standkIt is unsatisfactory for r1+dk<The condition of 500m, i.e. 20 phone users are unable to one phone user's resource of concurrent multiplexing；Only
Have as M=17, just meets the condition of many-one multiplexing；So the second reference under many-one multiplexer mode when need to calculate M=17
Distance r2 takes M=17, at this time according to the second signal-to-noise ratio formula (i.e. formula 1.2), can calculate D2D user's transmitting terminal to base
The the second reference distance r to stand2=166.189747702634m.
It can be seen from calculating above in step sl, D2D user to the distance between dI, jBigger, mutual is dry
Disturb smaller, communication quality is better.So when being grouped, the D2D user for keeping mutual distance remote that can be as possible is to multiple
With the frequency spectrum resource of the same phone user, it is more advantageous to the progress of D2D communications in this way.
In step s 2, according to the 4th signal-to-noise ratio constraints (with reference to formula 1.5), calculating meets cellular communication signal-to-noise ratio
The 4th reference distance r between D2D user's transmitting terminal of threshold value and base station4.That is when D2D user's transmitting terminal and base station
First measured distance is greater than or equal to the 4th reference distance r4When, D2D user can be multiplexed the frequency spectrum resource of phone user, and
Ensure that the communication of phone user can be carried out normally.
In step s 2, it is assumed that the maximum radius of cell is 500m, each D2D user is to maximum transmission power
Pmax=-20dbm is communicated, and according to the parameter value listed in table 1, calculates the 4th reference distance r4=
64.6330407009565m。
In step s 2, because by step S1 it is recognised that carrying out the D2D user of one-to-one multiplexing centered on by base station
With the second reference distance r2For in the circle of radius, since the phone user being re-used requires in third reference distance r3Except i.e. quilt
The phone user of multiplexing is greater than or is equal to third reference distance r with the second measured distance of D2D receiving terminals3, and in dkWithin
(phone user being re-used is less than d at a distance from base stationk).It can thus be appreciated that third reference distance r3With dkSum
Meet：r3+dk<r2, can just meet communicating requirement.
In step s 2, according to the snr threshold of one-to-one multiplexer mode D2D user receiving terminal, phone user and base are taken
The distance d to standk=52.4m, it is assumed that each D2D user is to maximum transmission power Pmax=-20dBm emits, and D2D is used
D2D user's receiving terminal of family centering and D2D user's transmitting terminal distance di=25m, then the phone user being re-used uses with D2D
The third reference distance r of family receiving terminal3=447.017580129090m.It is unsatisfactory for condition r at this time3+dk<r2。
Specifically, in step s 2, to meet condition r3+dk<r2, it is sequentially reduced dk.Work as dkWhen=17.4m, it is re-used
The third reference distance r of phone user and D2D user's receiving terminal3=148.437135386377m had both met D2D use at this time
The signal-to-noise ratio requirement of family receiving terminal, and meet r3+dk<r2Constraints.
In step s 2, it should be noted that when one-to-one multiplexing, r3 is bee of each D2D user to selection multiplexing
The reference distance of nest user, different D2D users is to that can have the reference distance of oneself.This example is with D2D maximum transmission power
And computation of maximal distance r3, in practice, each D2D user is to can according to the specific transmission power of oneself and D2D user couple
The distance between calculate the r3 of oneself.
In step s3, it may be determined that the multiplexer mode of D2D user couple selects.Specifically, as it was noted above, in step S1
In, as M=17, D2D user's transmitting terminal can be calculated according to the second signal-to-noise ratio formula (i.e. formula 1.2) and joined to the second of base station
Examine distance r2=166.189747702634m.So as the first measured distance d of D2D user's transmitting terminal and base stationi,BBe more than or
Person is equal to the second reference distance r2=166.189747702634m and be less than pre-set radius rth=500m, D2D user is to selection
Many-to-one multiplexer mode is communicated.Wherein, the position for the phone user being re-used is in being with D2D user's receiving terminal
The heart, with the first reference distance r1=459.103157530974m is outside the circle of radius.
In step s3, it may be determined that D2D multiplexer mode selection strategies.First when D2D user's transmitting terminal and base station is real
Ranging is from di,BMore than or equal to the 4th reference distance r4=64.6330407009565m and be less than the second reference distance r2
=166.189747702634m, D2D user is to that can select one-to-one multiplexer mode to communicate.Wherein, the bee being re-used
The position of nest user is centered on by D2D user's receiving terminal, with third reference distance r3=148.437135386377m is half
Outside the circle of diameter.
The present invention is derived using the ascending resource of multiplexing phone user according to the signal-to-noise ratio of D2D receiving terminals and base station
The multiplexer mode selection strategy of D2D user couple, to be D2D user to selecting flexible multiplexer mode.Using the multiplexer mode
Selection strategy not only can guarantee the communication quality of D2D communications and cellular communication but also can make as possible in the case of frequency spectrum resource shortage
More D2D users improves the handling capacity of system and the utilization rate of frequency spectrum resource to being successfully established communication.
Above example only technical concepts and features to illustrate the invention, its object is to allow person skilled in the art
Scholar can understand present disclosure and implement accordingly, can not limit the scope of the invention.It is all to be wanted with right of the present invention
The equivalent changes and modifications that range is done are sought, the covering scope of the claims in the present invention should all be belonged to.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (9)
1. a kind of equipment direct communication multiplexer mode selection method, which is characterized in that include the following steps：
S1, under many-one multiplexer mode, calculate meet cellular subscriber communications quality D2D user's transmitting terminal and base station second
Reference distance r2, and meet the phone user of D2D user communication qualities being re-used and the first reference of D2D user's receiving terminal
Distance r1；Wherein, the many-one multiplexer mode is multipair D2D user to being multiplexed phone user's resource；
S2, under one-to-one multiplexer mode, calculate meet cellular subscriber communications quality D2D user's transmitting terminal and base station the 4th
Reference distance r4, and meet the phone user of D2D user communication qualities being re-used and referred to the third of D2D user's receiving terminal
Distance r3；Wherein, a pair of multiplexer mode is a pair of of D2D user to being multiplexed phone user's resource；
S3, according to the second reference distance r2With the 4th reference distance r4Determine the multiplexer mode of D2D user couple；And according to institute
State the first reference distance r1With third reference distance r3The phone user being re-used is selected to be multiplexed.
2. equipment direct communication multiplexer mode selection method according to claim 1, which is characterized in that the step S1 packets
It includes：
S1-1, under many-one multiplexer mode, according to the snr threshold of the second signal-to-noise ratio formula and base station, be calculated described
Second reference distance r2。
3. equipment direct communication multiplexer mode selection method according to claim 1, which is characterized in that the step S1 packets
It includes：
S1-2, under many-one multiplexer mode, according to the snr threshold of the first signal-to-noise ratio formula and D2D user's receiving terminal, meter
Calculation obtains the first reference distance r1。
4. equipment direct communication multiplexer mode selection method according to claim 1, which is characterized in that the step S2 packets
It includes：
S2-1, under one-to-one multiplexer mode, according to the snr threshold of the 4th signal-to-noise ratio formula and base station, be calculated described
4th reference distance r4。
5. equipment direct communication multiplexer mode selection method according to claim 1, which is characterized in that the step S2 packets
It includes：
S2-2, under one-to-one multiplexer mode, according to the snr threshold of third signal-to-noise ratio formula and D2D user's receiving terminal, meter
Calculation obtains the third reference distance r3。
6. equipment direct communication multiplexer mode selection method according to claim 1, which is characterized in that the step S3 it
Before include：
Obtain the second actual measurement of the first measured distance and phone user and D2D user's receiving terminal of D2D user's transmitting terminal and base station
Distance.
7. equipment direct communication multiplexer mode selection method according to claim 6, which is characterized in that the step S3 packets
It includes：
S3-1, by first measured distance and the second reference distance r2, the 4th reference distance r4With pre-set radius rth
It is compared respectively；
If S3-2, first measured distance meet the first preset condition, many-one multiplexer mode is selected；If described first is real
Ranging then selects one-to-one multiplexer mode from the second preset condition is met；
Wherein, first preset condition is：Second reference distance r2≤ the first measured distance ＜ pre-set radius rth, described second
Preset condition is：4th reference distance r4≤ the first the second reference distances of measured distance ＜ r2；The pre-set radius rthFor base station
Can overlay area maximum radius.
8. equipment direct communication multiplexer mode selection method according to claim 6, which is characterized in that the step S3 packets
It includes：
S31, under many-one multiplexer mode, judge the phone user and D2D user's receiving terminal the second measured distance whether
More than or equal to the first reference distance r1；
If S32, the phone user and the second measured distance of D2D user's receiving terminal are greater than or equal to first reference distance
r1, phone user corresponding with second measured distance is selected to be multiplexed as the phone user being re-used.
9. equipment direct communication multiplexer mode selection method according to claim 6, which is characterized in that the step S3 packets
It includes：
S33, under one-to-one multiplexer mode, judge the phone user and D2D user's receiving terminal the second measured distance whether
More than or equal to the third reference distance r3；
If S34, the phone user and the second measured distance of D2D user's receiving terminal are greater than or equal to the third reference distance
r3, phone user corresponding with second measured distance is selected to be multiplexed as the phone user being utilized.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102083138A (en) * | 2011-01-14 | 2011-06-01 | 北京邮电大学 | Method for simultaneously multiplexing multiple cellular user resources by D2D (Device-to-Device) user pair |
| CN102088736A (en) * | 2011-01-14 | 2011-06-08 | 北京邮电大学 | User position list-based method for selectively multiplexing multiple honeycomb user resources for device to device (D2D) user pairs |
| CN102123496A (en) * | 2011-01-14 | 2011-07-13 | 北京邮电大学 | Method for multiplexing cellular user resources of device-to-device (D2D) user pairs based on base station positioning |
| US20130252621A1 (en) * | 2012-03-21 | 2013-09-26 | Telefonaktiebolaget L M Ericsson (Publ) | Dynamic resource selection to reduce interference that results from direct device to device communications |
-
2018
- 2018-03-23 CN CN201810247621.8A patent/CN108650661A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102083138A (en) * | 2011-01-14 | 2011-06-01 | 北京邮电大学 | Method for simultaneously multiplexing multiple cellular user resources by D2D (Device-to-Device) user pair |
| CN102088736A (en) * | 2011-01-14 | 2011-06-08 | 北京邮电大学 | User position list-based method for selectively multiplexing multiple honeycomb user resources for device to device (D2D) user pairs |
| CN102123496A (en) * | 2011-01-14 | 2011-07-13 | 北京邮电大学 | Method for multiplexing cellular user resources of device-to-device (D2D) user pairs based on base station positioning |
| US20130252621A1 (en) * | 2012-03-21 | 2013-09-26 | Telefonaktiebolaget L M Ericsson (Publ) | Dynamic resource selection to reduce interference that results from direct device to device communications |
Non-Patent Citations (1)
| Title |
|---|
| 梁敏豪: "基于复用模式选择的D2D干扰协调算法研究", 《中国优秀硕士学位论文全文数据库，信息科技辑》 * |
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