CN107911824A - A kind of method for allocating dynamic frequency spectrums and device - Google Patents
A kind of method for allocating dynamic frequency spectrums and device Download PDFInfo
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- CN107911824A CN107911824A CN201711085731.0A CN201711085731A CN107911824A CN 107911824 A CN107911824 A CN 107911824A CN 201711085731 A CN201711085731 A CN 201711085731A CN 107911824 A CN107911824 A CN 107911824A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/10—Dynamic resource partitioning
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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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
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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Abstract
The invention discloses a kind of method for allocating dynamic frequency spectrums and device, which includes：Each transmission frame is divided into the first subframe and the second subframe, and in the first subframe, signal is sent respectively to all D2D user and phone user；In the case where at least one D2D user is to signal successfully decoded, a D2D user is selected from the D2D user of all successfully decodeds according to default selection rule, and in the second subframe, phone user is sent a signal to by the D2D user after selection；Phone user merges the signal sent in the signal sent in the first subframe and the second subframe.Pass through above-mentioned technical proposal of the present invention, so as on the premise of phone user's normal communication is ensured, it is transmitted by D2D user collaboration phone users, and the system gain obtained with this dynamically to increase the frequency spectrum resource of the D2D user distributed to, so that frequency spectrum is more effectively utilized.
Description
Technical field
The present invention relates to the communications field, it particularly relates to a kind of method for allocating dynamic frequency spectrums and device.
Background technology
The also referred to as neighbouring discovery technique of D2D (Device-to-Device, equipment room) communications, it refers to when needs are led to
The terminal of letter apart from it is closer when, both can establish a kind of communication that direct connected link carries out data transmission under the control of base station
Mode, this communication mode can not only be multiplexed the frequency range of phone user by way of frequency spectrum share, also to a certain degree
On by equipment it is direct-connected come alleviate base station forwarding caused by overhead bear, it is achieved thereby that green communications.
D2D communications are at this stage since the Carrier Management fees policy factor such as do not reach an agreement is difficult to reach independent paving
If therefore the D2D that is used in existing cellular network communicates to improve the availability of frequency spectrum of system, can effectively utilize frequency
Spectrum resource, can achieve the purpose that to alleviate the rare phenomenon of frequency spectrum resource, for example, traditional scheme is D2D user with minimum work(
Rate is multiplexed phone user's frequency spectrum, in the form of similar to the substrate noise short-range communication of low-power in systems
(transmission of Substrate D2D Transmission, abbreviation SDT, D2D bottom), still, the frequency spectrum in the scheme of the prior art
Utilization rate is relatively low.
The problem of in correlation technique, not yet propose effective solution at present.
The content of the invention
The problem of in correlation technique, the present invention propose a kind of method for allocating dynamic frequency spectrums and device, it can protected
On the premise of demonstrate,proving phone user's normal communication, it is transmitted by D2D user collaboration phone users, and the system obtained with this increases
Benefit, which carrys out dynamic, increases the frequency spectrum resource of the D2D user distributed to, so that frequency spectrum is more effectively utilized.
The technical proposal of the invention is realized in this way：
A kind of according to an aspect of the invention, there is provided method for allocating dynamic frequency spectrums.
The method for allocating dynamic frequency spectrums includes：Each transmission frame is divided into the first subframe and the second subframe, and
In one subframe, signal is sent respectively to all D2D user and phone user；Signal is decoded at least one D2D user
In the case of successfully, a D2D user is selected from the D2D user of all successfully decodeds according to default selection rule, and
In the second subframe, phone user is sent a signal to by the D2D user after selection；Phone user will send in the first subframe
Signal and the second subframe in the signal that sends merge.
According to one embodiment of present invention, method for allocating dynamic frequency spectrums further includes：In all D2D with per family not to letter
In the case of number successfully decoded, in the second subframe, signal is resend to phone user.
According to one embodiment of present invention, method for allocating dynamic frequency spectrums further includes：All D2D users are divided into more
Group, and in the case where at least one set of D2D user is to signal successfully decoded, it is regular from successfully decoded according to default selection
A D2D user is selected in multigroup D2D user.
According to one embodiment of present invention, according to default selection rule from the D2D user of all successfully decodeds
A D2D user is selected to include：In the D2D user of all successfully decodeds, selection in cellular subscriber communications with possessing highest noise
The D2D user of ratio.
According to one embodiment of present invention, the first subframe and the second subframe are equal.
According to another aspect of the present invention, there is provided a kind of dynamic frequency spectrum deployment device.
The dynamic frequency spectrum deployment device includes：Sending module, for each transmission frame to be divided into the first subframe and second
Subframe, and in the first subframe, signal is sent respectively to all D2D user and phone user；Sending module is selected, is used
It is regular from all successfully decodeds according to default selection in the case of at least one D2D user to signal successfully decoded
D2D user in select a D2D user, and in the second subframe, honeycomb is sent a signal to by the D2D user after selection
User；Merging module, for the signal sent in the signal sent in the first subframe and the second subframe to be merged.
According to one embodiment of present invention, dynamic frequency spectrum deployment device further includes：Module is resend, for all
D2D with per family not to signal successfully decoded in the case of, in the second subframe, signal is resend to phone user.
According to one embodiment of present invention, select sending module, be additionally operable to all D2D users being divided into it is multigroup, with
And in the case where at least one set of D2D user is to signal successfully decoded, it is regular from the multigroup of successfully decoded according to default selection
A D2D user is selected in D2D user.
According to one embodiment of present invention, selection sending module includes：Submodule is selected, in all successfully decodeds
D2D user in, selection is with possessing the D2D user of highest signal to noise ratio in cellular subscriber communications.
According to one embodiment of present invention, the first subframe and the second subframe are equal.
The advantageous effects of the present invention are：
The present invention by each transmission frame by being divided into the first subframe and the second subframe, and in the first subframe, will believe
Number all D2D user and phone user are sent respectively to, then the situation at least one D2D user to signal successfully decoded
Under, a D2D user is selected from the D2D user of all successfully decodeds according to default selection rule, and in the second subframe
In, phone user, the signal that last phone user will send in the first subframe are sent a signal to by the D2D user after selection
Merged with the signal sent in the second subframe, so that on the premise of phone user's normal communication is ensured, pass through D2D user
Cooperation phone user is transmitted, and the system gain obtained with this dynamically to increase the frequency spectrum resource of the D2D user distributed to,
So that frequency spectrum is more effectively utilized.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the flow chart of method for allocating dynamic frequency spectrums according to embodiments of the present invention；
Fig. 2 is the change schematic diagram that the quantity of D2D user is accessed by traditional scheme；
Fig. 3 is the change schematic diagram that the quantity of D2D user is accessed by technical scheme；
Fig. 4 is the quantity of the maximized accessible D2D user realized by traditional scheme and technical scheme
Change schematic diagram；
Fig. 5 is the change schematic diagram for the availability of frequency spectrum realized by traditional scheme and technical scheme；
Fig. 6 is the block diagram of dynamic frequency spectrum deployment device according to embodiments of the present invention.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art's all other embodiments obtained, belong to what the present invention protected
Scope.
According to an embodiment of the invention, there is provided a kind of method for allocating dynamic frequency spectrums.
As shown in Figure 1, method for allocating dynamic frequency spectrums according to embodiments of the present invention includes：Step S101, will each transmit
Frame is divided into the first subframe and the second subframe, and in the first subframe, signal is sent respectively to all D2D users and bee
Nest user；Step S103, in the case where at least one D2D user is to signal successfully decoded, according to it is default selection rule from
A D2D user is selected in the D2D user of all successfully decodeds, and in the second subframe, will by the D2D user after selection
Signal is sent to phone user；Step S105, phone user will send in the signal sent in the first subframe and the second subframe
Signal merges.
In this embodiment, method for allocating dynamic frequency spectrums according to embodiments of the present invention includes：Step S1, will each transmit
Frame tkTwo equal subframes are divided into, are defined as tK, 1And tK, 2, in first subframe tK, 1In, cellular basestation E downlink transfers letter
Number xETo all D2D user DTi (0 ＜ i ＜ M, and i is positive integer) and phone user P in system；Step S2, if D2D is used
Family DTi is successfully to signal xEDecoding, selects it with there is that user of highest signal-to-noise ratio in phone user P；Step S3,
In tK, 2In, the highest D2D user of signal-to-noise ratio is selected in step S2 by signal xEIt is transmitted to phone user P；Step S4, if D2D user
DTi is not to signal xESuccessfully decoded, in tK, 2In, cellular basestation E will be again by signal xEIt is transmitted to phone user P；Step S5,
Phone user (or receiving terminal) P, using maximum-ratio combing method, and merges tK, 1And tK, 2Signal.So as to due to D2D user
Help phone user P transmission, same signal xEPurpose user P is given by different path transmissions, this will bring to system
Certain diversity gain, systematic entirety can be lifted.Meanwhile due also to the addition of D2D user, to the phone user in system with
Interference necessarily is carried out, diversity gain can offset the interference of part, and while gain and interference are cancelled out each other, D2D user obtains
The more multiple spectra of system distribution was obtained, D2D communications can be carried out.Therefore, by the cooperation transmission of above-mentioned this mode, more rationally
Ground is assigned with frequency spectrum resource, so as to also be effectively improved the availability of frequency spectrum of system.
By means of the present invention above-mentioned technical proposal, by the way that each transmission frame is divided into the first subframe and the second subframe,
And in the first subframe, signal is sent respectively to all D2D user and phone user, then used at least one D2D
In the case that family is to signal successfully decoded, one is selected from the D2D user of all successfully decodeds according to default selection rule
D2D user, and in the second subframe, phone user, last phone user are sent a signal to by the D2D user after selection
The signal sent in the signal sent in first subframe and the second subframe is merged, so as to ensure the positive normal open of phone user
On the premise of letter, it is transmitted by D2D user collaboration phone users, and the system gain obtained with this dynamically to increase distribution
The frequency spectrum resource of the D2D user given, so that frequency spectrum is more effectively utilized.
According to one embodiment of present invention, method for allocating dynamic frequency spectrums further includes：In all D2D with per family not to letter
In the case of number successfully decoded, in the second subframe, signal is resend to phone user.
According to one embodiment of present invention, method for allocating dynamic frequency spectrums further includes：All D2D users are divided into more
Group, and in the case where at least one set of D2D user is to signal successfully decoded, it is regular from successfully decoded according to default selection
A D2D user is selected in multigroup D2D user.
According to one embodiment of present invention, according to default selection rule from the D2D user of all successfully decodeds
A D2D user is selected to include：In the D2D user of all successfully decodeds, selection in cellular subscriber communications with possessing highest noise
The D2D user of ratio.
According to one embodiment of present invention, the first subframe and the second subframe are equal.
In order to preferably describe technical scheme, it is described in detail below by specific embodiment.
In the inventive solutions, represent cellular basestation with E, with P represent cellular mobile telephone user (or honeycomb use
Family), DTi–DRiRepresent i-th of D2D transmitters-receiver pair, wherein, i 1 ..., N, i.e. i are positive integer.At the same time, it is assumed that bee
Nest base station E transmission signals xETo phone user P, power is PE, data transmission rate is RE.D2D transmitter DTi transmission signals xDTArrive
Receiver DRi, power is PDT, data transmission rate is R.For ease of analysis, it is further assumed that the transimission power of D2D transmitters is each other
It is equal, that is, PDT1=...=PDTi=PD.In addition, use YiRepresent the signal received in i points, use PoutRepresent to interrupt general
Rate, PXRepresent X probability of happening.
In addition, under normal conditions, it is assumed that D2D user and cellular mobile telephone user P share Internet resources.Therefore, D2D is passed
It is defeated to produce interference to cellular transmission.To solve the above-mentioned problems, need to carry out Power Control in D2D systems, as long as meeting D2D
The demand of the QoS (Quality of Service, service quality) of user and cellular mobile telephone user, multiple D2D pairs can be with
Busy channel at the same time.But problems faced is in traditional scheme, is added if accessing D2D pairs of quantity, to honeycomb
The interference of transmission also can substantially increase.In order to solve this problem, it is proposed that the solution of the present invention, by assisting cellular transmission,
D2D user is set to obtain the chance of access, meanwhile, the present invention quantifies the outage probability of QoS, i.e. data-link with performance outage probability
Given threshold value should be maintained at or below, it is specific as follows：
In traditional scheme, before guarantee on the premise of the requirement of the QoS of K D2D user, can allow preceding K (0≤K≤
N) the frequency spectrum that a D2D users to share is taken by phone user P, because if being once further added by the number of D2D user, cannot protect
Demonstrate,prove the QoS of phone user.In this case, K D2D user and cellular mobile telephone user, in a time period tkIt is interior, can
With simultaneous transmission of signals.Due to the limitation of phone user QoS, this scheme on the premise of phone user is not disturbed, access
D2D numbers of users are very limited, can not fundamentally lifting system the availability of frequency spectrum.
In the solution of the present invention, it is allowed to preceding a D2D transmitters of M (0≤M≤N) assist the cellular transmission of phone user P,
Transmitted so as to exchange a part of frequency spectrum for be applied to D2D.While D2D user brings interference to system, the cooperation of D2D user
Transmission also brings considerable diversity gain for system, and the interference brought to system is balanced out with this, its specifically mistake
Journey is as follows：
First, respectively by each time period tkTwo equal subframes are divided into, are defined as tK, 1And tk,2, and first
A subframe tK, 1In, cellular basestation E transmitting signals xEAfter D2D transmitters DTi and phone user P, D2D transmitters are successfully right
Signal xEDecoding, selects it with there is that user of highest signal-to-noise ratio in phone user P, in tK, 2In, select it will letter
Number xEIt is transmitted to phone user P.If it find that in tK, 1In all M D2D transmitters all cannot be to signal xEDecoded, in tK, 2
Middle cellular basestation E will resend tK, 2To phone user P.Here, D2D transmitters are using decoding and retransmission protocol, phone user
The method that P employs maximum-ratio combing, incorporates tk,1And tK, 2Signal.D2D user assists cellular transmission, as long as can guarantee that P
In QoS, cellular basestation E will discharge part 1- β cellular frequency spectrum frequency band to D2D user, it is assumed that the frequency bandwidth at P ends is W,
Wherein, 0≤β≤1.Meanwhile the frequency spectrum discharged here is further divided into K sub-channels in next step, all with identical frequency
Bandwidth, including preceding K D2D user and afterwards each D2D pairs, are all in different tkOperated in subchannel,
This shows that the transmitter of the D2D cellular signal that be able to can cooperate is transmitted, while can also be sent in the scheme newly proposed
The signal of oneself, because it has used different frequency ranges.It is special instruction, can be easily real in the transmitter of D2D
It is existing, because being commonly equipped with multiple wireless access access techniques in such transmitter.
In order to preferably describe beneficial effect of the technical scheme relative to prior art SDT, below by imitative
True result carries out relevant analysis.
First, it is assumed that square area of the heterogeneous wireless network in 500m × 500m, cellular basestation E is located at this area here
The center in domain.The quantity of all workable D2D users couple is N=60, is its reception with the distance 200m of cellular basestation E
Phone user P, the spacing distance d being set between phone user P and cellular basestationE, C=200m.Meanwhile for D2D to be with
In the square area that machine is placed, the setting of ultimate range and receiver between each D2D transmitters is 20m, in addition, association
The quantity for making D2D transmitters is M=2, and it is c=0.8 that path loss, which is set to constant, and path loss index is α=4, cellular link
The bandwidth of E-P is W=1MHz (megahertz), AWGN's (Additive White Gaussian Noise, additive white Gaussian noise)
Power spectral density is that the power budget of 4.0 × 10-21W/Hz and each D2D transmitters is Po=PDC+PDD=10dBm, wherein,
PDCFor the collaboration power of D2D transmitters, PDDFor the D2D power of D2D transmitters.
In addition, as shown in Fig. 2, in traditional scheme, the quantity of accessible D2D user is simulated with the power of transmitter
PDVariation relation figure, data transmission rate is RE=RDTi=0.1bits/s/Hz (spectrum efficiency), outage probability threshold value are ρP
=ρD=0.08.
First, in traditional scheme, accessible D2D numbers of users correspond to the power P of D2D transmittersDBetween
Relation, as shown in Fig. 2, wherein, abscissa PDFor the transimission power of D2D transmitters, and SDT with PE=400dBM is represented
In prior art, cellular basestation E transmission signals xEPower to phone user P is 400dBM, SDT with PE=
In 200dBM expression prior arts, cellular basestation E transmission signals xEPower to phone user P is 200dBM, can be seen
To the different cellular basestation transmission power that corresponds to simulate to obtain two broken lines, the variation tendency of two broken lines is identical
, when the power of D2D transmitters is smaller, due to the limitation of minimum transmission power requirement between D2D user, accessed in system
D2D numbers of users are less, with the increase of D2D transmitter powers, when the power of the requirement between D2D is satisfied, in system
More and more D2D users will be allowed to be added in system, the trend risen is presented in broken line at this time.But with D2D user's
Increase, more and more interference will be brought to system, under the limitation of the QoS of phone user, allow the D2D user of access
After quantity reaches maximum, with the power increase of D2D transmitters, reduced trend is presented.Its simulated effect and a upper trifle
Theoretical research it is consistent.
In addition, as shown in figure 3, wherein, abscissa PDCFor the collaboration power of D2D transmitters, and CDT with PE=
300dBM represent in the inventive solutions, cellular basestation E transmission signals xEPower to phone user P is 300dBM,
CDT with PE=200dBM represent in the inventive solutions, cellular basestation E transmission signals xETo the work(of phone user P
Rate is 200dBM, can access D2D numbers of users in the inventive solutions, in emulation with collaboration power PDCChange close
System's figure, data rate is RE=RDTi=0.2bits/s/Hz, outage probability threshold value are ρP=10-6And ρD=10-3。
From Fig. 3 it is known that as D2D user's power that cellular mobile subscriber is transmitted that is used to cooperating increases, with
The frequency spectrum carried out data transmission for D2D user that this is gained by cost is more and more, can access the D2D user of cellular network
Number is also increasing, but works as since disturbing effect caused by the addition of D2D user is more than what is brought to cellular mobile subscriber
When diversity gain effect, downward trend will be presented in the D2D numbers of users that can access in system.Therefore, D2D can be adjusted
The collaboration power of transmitter, so that by the D2D user of accessible cellular network to maximizing.
Furthermore it should be noted that in traditional scheme, in the case where base station transmitting power is larger, it is impossible to pass through increasing
The method of base station transmitting power is added to be maximized further to make can access cellular D2D numbers of users.In Fig. 2, in Base Transmitter
In the case of power difference, system allows the maximum of the quantity of D2D user's access to be identical.Simply correspond to different base stations
Transmission power PE, when D2D number of users access values reach maximum, the transmission power of required D2D user is different.But base station
Transmission power or the increases of transmission power of D2D transmitters increase to ensure that system is believed while be required to corresponding other side's power
Number interference ratio equilibrium, therefore, traditional scheme cannot be by increasing Base Transmitter work(in the case where base station transmitting power is larger
Rate lifts the quantity of the D2D user of accessible system.But technical scheme substantially can be by lifting the hair of base station
Power is penetrated, to improve the transmission performance of cellular network, thus, it is possible to can be considered as to a certain extent to D2D cooperation transmissions
Strengthen, therefore, traditional scheme can allow the D2D user of accessible Cellular Networks to increase by lifting base station transmitting power.The present invention
Technical solution performance it is more superior than traditional scheme.
In addition, as shown in figure 4, wherein, abscissa PEFor cellular basestation E transmission signals xETo the power of phone user P, and
SDT withρP=ρD=0.001 represents that outage probability threshold value is 0.001, CDT with ρ in the prior art schemeP=ρD
=0.001 represents that outage probability threshold value is 0.001, SDT with ρ in the inventive solutionsP=ρD=0.08 represents
In the prior art scheme, outage probability threshold value is 0.08, CDT with ρP=ρD=0.08 represents the technical side in the present invention
In case, outage probability threshold value is 0.08, in conventional method and technical scheme, has simulated accessible D2D
User's maximum quantity is with base station transmitting power PEThe graph of a relation of change, wherein, data rate is PD=PDC=0dBm and RE=
RDTi=0.2bits/s/Hz.
In addition, it is that maximumlly can access honeycomb in traditional scheme and technical scheme that analogous diagram 4 is described
The D2D numbers of users of net.Can significantly it find out from Fig. 4, traditional scheme can be effectively compared to technical scheme
Improve the D2D numbers of users that can access cellular network.In traditional scheme, in relatively low PERegion, no D2D user can visit
Ask cellular frequency spectrum, and technical scheme then can access the D2D user of part, while the honeycomb that can cooperate is transmitted.
Meanwhile in traditional scheme, high PERegion, the accessible D2D numbers of users of maximum quantity will keep a constant numerical value, such as
Shown in Fig. 2.However, in the inventive solutions, as base station transmitting power PE, can due to the cellular transmission that cooperates when higher
The frequency spectrum quantity of release is increasing, therefore the maximum of D2D user can access honeycomb quantity and can also increase with the raising of PE.Most
Afterwards, with expected, in traditional scheme and technical scheme, the accessible D2D numbers of users of maximum can be with
Base station transmitting power PEIncrease and improve.
As shown in figure 5, wherein, abscissa PEFor cellular basestation E transmission signals xETo the power of phone user P, and SDT
withρP=ρD=0.001 represents that outage probability threshold value is 0.001, CDT with ρ in the prior art schemeP=ρD=
0.001 represents in the inventive solutions, and outage probability threshold value is 0.001, in traditional scheme and the technology of the present invention
In scheme, the availability of frequency spectrum has been simulated with base station transmitting power PEThe graph of a relation of change, data transmission rate PD=PDC=
0dBm and RE=RDTi=0.2bits/s/Hz.Fig. 5 have studied the cellular transmission power of technical scheme and system spectrum
Relation between utilization rate, and compared with having been done with traditional scheme.In single cellular transmission, if desired for the service quality for meeting to give
QoS, it is necessary to more can access cellular D2D user, just can guarantee that the higher availability of frequency spectrum.Therefore, define here
The availability of frequency spectrum corresponds to accessible D2D numbers of users, that is, distributes to the frequency spectrum resource of D2D user, its applicability is for all
D2D user.It was observed that, technical scheme significantly improves the availability of frequency spectrum compared with traditional scheme in Figure 5.This
Outside, contrasted with traditional scheme, technical scheme can reach under relatively low base station transmitting power higher is
The availability of frequency spectrum of system, and the D2D user newly accessed, the honeycomb that can not only cooperate carries out data transmission, also to a certain degree
On cover cellular blind area.2 points of the above, can reduce the energy expenditure of base station, meet the requirement of green communications.
According to an embodiment of the invention, a kind of dynamic frequency spectrum deployment device is additionally provided.
As shown in fig. 6, dynamic frequency spectrum deployment device according to embodiments of the present invention includes：Sending module 61, for will be every
A transmission frame is divided into the first subframe and the second subframe, and in the first subframe, signal is sent respectively to all D2D and is used
Family and phone user；Sending module 62 is selected, in the case of at least one D2D user to signal successfully decoded, according to
Default selection rule selects a D2D user from the D2D user of all successfully decodeds, and in the second subframe, passes through
D2D user after selection sends a signal to phone user；Merging module 63, for the signal that will be sent in the first subframe and
The signal sent in two subframes merges.
According to one embodiment of present invention, dynamic frequency spectrum deployment device further includes：Module (not shown) is resend, is used
In all D2D with per family not to signal successfully decoded in the case of, in the second subframe, signal is resend to honeycomb
User.
According to one embodiment of present invention, select sending module 62, be additionally operable to all D2D users being divided into it is multigroup,
And in the case where at least one set of D2D user is to signal successfully decoded, it is regular from the more of successfully decoded according to default selection
A D2D user is selected in group D2D user.
According to one embodiment of present invention, selection sending module includes：Submodule (not shown) is selected, for all
In the D2D user of successfully decoded, selection and the D2D user for possessing highest signal to noise ratio in cellular subscriber communications.
According to one embodiment of present invention, the first subframe and the second subframe are equal.
In conclusion by means of the above-mentioned technical proposal of the present invention, by dividing two subframes, if D2D user successfully solves
Code, D2D user collaboration phone users are transmitted, and exchange more frequency spectrum resources for, if D2D user decodes not successfully, honeycomb the
Secondary transmission signal can also produce diversity gain, so as to expand the access quantity of D2D user, i.e. D2D user to phone user
More frequency spectrum resources are assigned, if D2D user is successfully decoded, select a pair of of D2D user of signal-to-noise ratio maximum to be assisted
Transmit, both improved the reliability of system, turn avoid the interference that excessive D2D user brings system.In addition, also pass through
D2D user collaboration phone users are transmitted, and save the transmission power of base station to a certain extent, meet wanting for green communications
Ask, also the transmit power by adjusting base station, expand the frequency spectrum resource for distributing to D2D user, also by adjusting D2D transmitters
Power, so that the neatly quantity (frequency spectrum resource for distributing to D2D user) of the D2D user of control access Cellular Networks, so that suitable
Answer the needs of different application situation.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on, should all be included in the protection scope of the present invention god.
Claims (10)
- A kind of 1. method for allocating dynamic frequency spectrums, it is characterised in that including：Each transmission frame is divided into the first subframe and the second subframe, and in first subframe, signal is sent respectively To all D2D user and phone user；It is regular from all solutions according to default selection in the case where at least one D2D user is to the signal successfully decoded A D2D user is selected in the successful D2D user of code, and in second subframe, by the D2D user after selection by described in Signal is sent to the phone user；The phone user merges the signal sent in the signal sent in first subframe and second subframe.
- 2. method for allocating dynamic frequency spectrums according to claim 1, it is characterised in that the method for allocating dynamic frequency spectrums also wraps Include：All D2D with per family not to the signal successfully decoded in the case of, in second subframe, by the signal Resend to the phone user.
- 3. method for allocating dynamic frequency spectrums according to claim 1, it is characterised in that the method for allocating dynamic frequency spectrums also wraps Include：All D2D users are divided into it is multigroup, and in the case where at least one set of D2D user is to the signal successfully decoded, One D2D user is selected from multigroup D2D user of successfully decoded according to default selection rule.
- 4. method for allocating dynamic frequency spectrums according to claim 3, it is characterised in that regular from all according to default selection Successfully decoded D2D user in select a D2D user to include：In the D2D user of all successfully decodeds, selection is used with possessing the D2D of highest signal to noise ratio in the cellular subscriber communications Family.
- 5. method for allocating dynamic frequency spectrums according to claim 1, it is characterised in that first subframe and second son Frame is equal.
- A kind of 6. dynamic frequency spectrum deployment device, it is characterised in that including：Sending module, will for each transmission frame to be divided into the first subframe and the second subframe, and in first subframe Signal is sent respectively to all D2D user and phone user；Sending module is selected, in the case of at least one D2D user to the signal successfully decoded, according to default choosing Select rule and a D2D user is selected from the D2D user of all successfully decodeds, and in second subframe, pass through selection The signal is sent to the phone user by D2D user afterwards；Merging module, for the signal sent in the signal sent in first subframe and second subframe to be closed And.
- 7. dynamic frequency spectrum deployment device according to claim 6, it is characterised in that the dynamic frequency spectrum deployment device also wraps Include：Resend module, for all D2D with per family not to the signal successfully decoded in the case of, described second In subframe, the signal is resend to the phone user.
- 8. dynamic frequency spectrum deployment device according to claim 6, it is characterised in that the selection sending module, is additionally operable to All D2D users are divided into it is multigroup, and in the case where at least one set of D2D user is to the signal successfully decoded, according to Default selection rule selects a D2D user from multigroup D2D user of successfully decoded.
- 9. dynamic frequency spectrum deployment device according to claim 8, it is characterised in that the selection sending module includes：Submodule is selected, in the D2D user of all successfully decodeds, selection in the cellular subscriber communications with to possess highest The D2D user of signal-to-noise ratio.
- 10. dynamic frequency spectrum deployment device according to claim 6, it is characterised in that first subframe and described second Subframe is equal.
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