CN106953704A - A kind of spectrum auction method based on imperfect frequency spectrum detection in CoMP system - Google Patents
A kind of spectrum auction method based on imperfect frequency spectrum detection in CoMP system Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/022—Site diversity; Macro-diversity
- H04B7/026—Co-operative diversity, e.g. using fixed or mobile stations as relays
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
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Abstract
The invention provides a kind of spectrum auction method based on imperfect frequency spectrum detection in CoMP system, comprise the following steps：S10：Starting stage, including procedure below：Static cell sub-clustering is carried out in CoMP system, from the fixation cooperation cell collection of multiple cells, and it is individual to set the collaboration user equipment in each cooperation cell；S20：Frequency spectrum detection stage, including procedure below：Idle frequency spectrum detection is carried out using cognitive frequency spectrum perception technology, idle frequency range is collected and carries out auction preparation；S30：In the auction stage, the spectrum auction model based on imperfect frequency spectrum detection is established, design buyer, seller, frequency spectrum broker, and optimize buyer's revenue function, idle frequency band is auctioned in time slot using sealed first-price auction scheme.The method of the present invention improves the availability of frequency spectrum of CoMP system, and then improves the entire throughput of system.
Description
Technical field
The present invention relates to wireless communication technology field, and in particular to a kind of CoMP (Coordinated Multiple
Points, multipoint cooperative) the spectrum auction method based on imperfect frequency spectrum detection in system
Background technology
Towards 2020 and future, mobile Internet and Internet of Things, as two large driving forces of mobile communication, are to move in the 5th generation
Dynamic communication (5G) provides wide application prospect.Compared with forth generation mobile communication (4G), 5G will more focus on meeting various
The communication scenes and ultimate attainment Consumer's Experience of property, and make full use of the frequency spectrum resources such as low frequency and high frequency.However, high band covers energy
Power is weak, it is difficult to realize that the whole network is covered.During 5G Communication Developments, the frequency spectrum resource of high band is by more with the shape of network interworking
Formula is used cooperatively with low-frequency range frequency spectrum resource.The frequency spectrum resource of low-frequency range remains a kind of scarce resource.How in 5G communications
Improve the availability of frequency spectrum, especially improve low-frequency range frequency spectrum utilization rate, by as needed in 5G Communication Developments emphasis consider
Problem.
It is used as the key technology of the collaboration communication in advanced Long Term Evolution (LTE-A), coordinate multipoint (CoMP) transmission/reception
System will continue to play an important role in 5G collaboration communications, and CoMP system can be by improving the communication matter of Cell Edge User
Amount, so as to improve the handling capacity of overall communication system.Although the frequency spectrum resource distribution that is introduced as of CoMP system brings new work
Power, but the intrinsic frequency spectrum method of salary distribution is a kind of static allocation mode, the static spectral distribution in traditional CoMP system
In mode, the edge customer equipment of cooperation cell is big due to interference, thus these user equipmenies frequency spectrum resource be allocated it is excellent
First level is than relatively low, and it is low to have in turn resulted in frequency spectrum resource utilization rate, the problem of very flexible.
On the one hand, based on frequency spectrum resource utilization rate it is low the problem of, cognition wireless technology appear as frequency spectrum resource distribution band
New vitality is carried out, cognitive techniques can obtain the information of internal and external environment, and network be configured and right based on cognitive result
Radio Resource is managed.The purpose of frequency spectrum perception is to find the frequency spectrum of free time, is the precondition and guarantee for realizing cognitive techniques, more
It is most important technology in cognition wireless technology.However, up to the present, perfect frequency spectrum perception is difficult to realize in practice,
It can not be detected in cognitive techniques in the presence of idle frequency spectrum, also few researchs consider faulty frequency in CoMP system
Compose perception problems.On the other hand, Game Theory is a kind of based on market mechanism, has fairness and high efficiency concurrently, is widely used
Limited resource is distributed in wireless communication system.In order to improve the availability of frequency spectrum of CoMP system, we in CoMP system,
Game Theory is introduced, idle frequency range is auctioned using sealed first-price auction.
The content of the invention
The purpose of the present invention be in view of the shortcomings of the prior art, in order to improve the availability of frequency spectrum of CoMP system, by
In CoMP system, Game Theory is introduced, idle frequency range is auctioned using sealed first-price auction.
Based on the static spectral method of salary distribution intrinsic in above-mentioned CoMP system and faulty frequency spectrum perception communication scenes, with
And the application background of Game Theory, we intend proposing a kind of spectrum auction side based on imperfect frequency spectrum perception in CoMP system
Method.On the one hand, our founding mathematical models, the imperfect frequency spectrum detection problem in CoMP system is described using Markov Chain.
On the other hand, we establish the spectrum auction model based on imperfect frequency spectrum detection in CoMP system, design buyer, sell
Family, frequency spectrum broker, and optimize buyer and bid function.Finally, synchronous with frequency spectrum detection according to above-mentioned condition, we utilize the
One price sealed auction scheme is auctioned idle frequency band in time slot, is improved the availability of frequency spectrum of CoMP system, is entered
And improve the entire throughput of system.The purpose of the present invention is realized by following technical schemes.
The spectrum auction method based on imperfect frequency spectrum detection, comprises the following steps in a kind of CoMP system：
S10：Starting stage, the starting stage includes procedure below
In CoMP system, static cell sub-clustering is carried out, most strongly disturbing cell is merged, from multiple cells
Fixed cooperation cell collection, and the collaboration user equipment in each cooperation cell is set to be N number of；
S20：Frequency spectrum detection stage, the frequency spectrum detection stage includes procedure below
In CoMP system, idle frequency spectrum detection is carried out using cognitive frequency spectrum perception technology, idle frequency range is collected and is clapped
Preparation is sold, if frequency range is detected as idle condition, spectrum auction is carried out in the time slot.
S30：Auction stage, the auction stage includes procedure below
S31：Buyer is that the CEUE being determined is concentrated in the cooperation cell in CoMP system, and seller is that cooperation cell concentration possesses
During eNB (eNodeB, enhanced base station) in the user equipment of idle frequency range, cooperation cell is frequency spectrum broker, auction process,
The eNB delimited in time slot, cooperation cell serves as the role of frequency spectrum broker in each time slot in turn；
S32：Auctioned using sequential auction scheme：
First, in the beginning of each time frame, it is determined that the time span that idle frequency range to be auctioned and CEUE should be detected,
Set idle frequency range collection to be auctioned and be combined into C={ c1,c2,c3...cs}；
Then, eNBs of each CEUE into respective cooperation cell sends frequency spectrum detecting result, and each CEUE is to each frequency range
Evaluated, set CEUE to the evaluation function of frequency range as formula 4：
xti=Cj·Dti·(T-τ) (4)
In formula 4, CjRepresent j-th of idle frequency range in idle frequency range set, DtiRepresent the buyer residing for oneself
Unit data flow in cooperation cell, T represents the length of transmission frame, and τ represents the time span of frequency range detection；
Finally, the eNB of the cooperation cell collection collects the estimate of each buyer, and obtains the utility function of buyer：When not
Consider CEUE between interfere in the case of, the revenue function such as formula 5 of buyer：
Vti=xti-bti (5)
In formula 5, xtiRepresent not consider the appraisal in the case of disturbing, btiRepresent t-th of CEUE in i-th of cooperation cell
Appraisal to j-th of idle frequency range；Between considering CEUE interfere situation after, the revenue function such as formula 6 of buyer：
Vti=h (xti)-bti (6)
In formula 6, h (xti) represent not considering the appraisal under disturbed condition, h (xti)<xti, set Y1=max
(x21,....,xN3), G (Y1≤ y)=F (xti≤y)N-1, wherein, G () and F () represent Y respectively1And xtiCumulative distribution
Function, then Y1Probability density function be expressed as formula 7：
g(xti)=(3N-1) f (xti)[F(xti)]3N-1 (7)
In formula 7, f (xti) represent appraisal xtiProbability density function, then each buyer h (xti) expected revenus mR(xti)
For formula 8：
S33：Optimal bid of setting buyer is the function of their appraisals, with B (xti) represent optimization function of bidding, pass through
To maximizing mR(xti) on the b that bidstiDerivation, the function B (x that bid after must optimizingti) it is formula 9：
S34：Auction is carried out to idle frequency range using sealed first-price auction scheme：
The collaboration user equipment that cooperation cell is concentrated carries out auction to the frequency range in idle frequency range set, by the competitive bidding of oneself
Price sealed submits to the eNB in the set of the cooperation cell, and in each time slot, bid soprano to some idle frequency range
The right to use of the frequency range in this time slot will be obtained；The frequency range that CEUE is obtained by auction, and carried out using CoMP-JP technologies
Data transfer.
Further carry out in example, in step slo, in CoMP system, pass through the CQI (channel of user equipment
Quality indicator) value feedback, and set threshold value α come determine cooperation cell concentrate collaboration user equipment, specifically
Process is：First, it is assumed that the feedback that cooperation cell is concentrated is perfect feedback；Then, divide what cooperation cell was concentrated according to formula 1
Central user equipment (CCUE, cell central user equipment) and edge customer equipment (CEUE, cell edge
user equipment)：
In formula 1, CQItiRepresent the CQI feedback value of t-th of user equipment in current i-th of cooperation cell；CQImaxRepresent
The CQI maximum feedback values of user equipment in current cooperative cell set；α represents to judge the thresholding that user equipment is concentrated in cooperation cell
Value；Finally, the CEUE in the cooperation cell is counted, and the CEUE is set to the collaboration user equipment that cooperation cell is concentrated.
Further carry out in example, in step S20, frequency band is carried out by setting up markovian Statistical Probabilistic Models
It is the use state description of idle or busy condition, detailed process is：
First, four kinds of faulty frequency spectrum perception probability are set with：PfRepresent probability of false detection；PmDetection probability is missed in expression；
PuRepresent the correct detection probability when frequency range is not present；PdRepresent the correct detection probability in the presence of idle frequency range；
Secondly, four kinds of frequency band use states are concentrated in setting cooperation cell：Idle true, idle false, busy true, busy vacation；
The probability that idle frequency range is detected in th time slot of jth is calculated by formula 2 againCalculate and examine by formula 3
Measure the probability that the frequency band in th time slot of jth is in busy condition
In formula 2,3,Represent in the initial of th time slot of jth
The frequency range in stage detects the probability of non-idle condition, wherein,In the previous time slot for representing th time slot of jth
The probability of idle frequency range is detected, γ represents probabilityTransition probability, β represented before th time slot of jth
The probability of idle frequency range shape is can't detect in one time slotState transition probability.
Further carry out in example, in step s 32, as do not detected idle frequency range in time slot, then do not enter
Row spectrum auction.
Further carry out in example, in step S34, the auction process is synchronous with frequency spectrum detection to be carried out, when each
Between carry out frequency spectrum detection in gap, and idle frequency range is put into idle frequency range set C to be auctioned, and in time slot
Incipient stage carries out frequency range auction.The soprano that bidded to certain idle frequency range just obtains use of the idle frequency range in the time slot
Power.
The inventive method is initialized by the user in the cooperation cell set pair cooperation cell of CoMP system first, so
Fit afterwards actual communication scenes, it is contemplated that the imperfect frequency spectrum detection scene in CoMP, mathematics is set up using Markov Chain
Model, optimizes the revenue function of buyer, idle frequency spectrum resource in collaboration set is detected, and idle frequency spectrum resource is put into treated
It is used to auction in the frequency range set of auction, finally, according to conditions of auction, while frequency spectrum detection, the frequency to be auctioned to being put into
Idle frequency range in Duan Jihe is auctioned, and determines the attaching problem of idle frequency range in this timeslot, and then improve CoMP systems
The availability of frequency spectrum and handling capacity of system.
The inventive method can be used for effectively dividing the idle frequency band after the faulty frequency spectrum detection in CoMP system
Match somebody with somebody, particularly by Game Theory is combined, improve the data throughout of the edge customer equipment in the set of cooperation cell, optimize and buy
The bidding strategy of bidding of family, improves the availability of frequency spectrum and data throughout of CoMP system, is beneficial to the frequency in CoMP system
Spectrum distribution method moves towards dynamic from static state, is more close to practical application.
Brief description of the drawings
Fig. 1 be the inventive method in CoMP system in cooperation cell collection model schematic；
Fig. 2 is the probability conversion schematic diagram based on imperfect frequency spectrum detection in the inventive method；
Embodiment
Present invention is further elaborated with reference to the accompanying drawings and examples, but is not limitation of the invention.
Embodiment：
Spectrum auction method based on imperfect frequency spectrum detection in a kind of CoMP system that the present embodiment is provided, including it is following
Step：S10：Starting stage；S20：The frequency spectrum detection stage；S30：The auction stage.The detailed process in each stage is in herein below
It is addressed further under.
S10：Starting stage, the starting stage includes procedure below
In CoMP system, the model of cooperation cell collection in static cell sub-clustering, CoMP system as shown in Figure 1, association are carried out
Make cell set to be made up of 3 cells, therefore from the fixation cooperation cell collection of 3 cells, cell 1, cell 2, cell 3 are constituted
Cooperation cell collection in CoMP system, most strongly disturbing cell is merged, and sets the use of the cooperation in each cooperation cell
Family equipment is N number of, can also select the fixation of 4 or 5 or more cells in CoMP system as the case may be certainly
Cooperation cell collection.
Specifically, in CoMP system, CQI (channel quality indicator) value of user equipment is passed through
Feedback, and set threshold value α to determine the collaboration user equipment of cooperation cell concentration, detailed process is：First, it is assumed that cooperation is small
The feedback that area is concentrated is perfect feedback；Then, central user equipment (CCUE, cell that cooperation cell is concentrated are divided according to formula 1
Central user equipment) and edge customer equipment (CEUE, cell edge user equipment)：
In formula 1, CQItiRepresent the CQI feedback value of t-th of user equipment in current i-th of cooperation cell；CQImaxRepresent
The CQI maximum feedback values of user equipment in current cooperative cell set；α represents to judge the thresholding that user equipment is concentrated in cooperation cell
Value；Finally, the CEUE in the cooperation cell is counted, and the CEUE is set to the collaboration user equipment that cooperation cell is concentrated.
S20：Frequency spectrum detection stage, the frequency spectrum detection stage includes procedure below
In CoMP system, idle frequency spectrum detection is carried out using cognitive frequency spectrum perception technology, idle frequency range is collected and is clapped
Preparation is sold, if frequency range is detected as idle condition, spectrum auction is carried out in the time slot；If frequency range is detected as busy
State, without spectrum auction；
Further, due to the imperfect feature of cognitive frequency spectrum perception, the probability conversion based on imperfect frequency spectrum detection
Therefore situation as shown in Fig. 2 be idle or busy condition by setting up markovian Statistical Probabilistic Models to carry out frequency band
Use state description, detailed process is：Probability conversion based on imperfect frequency spectrum detection
First, four kinds of faulty frequency spectrum perception probability are set with：PfRepresent probability of false detection；PmDetection probability is missed in expression；
PuRepresent the correct detection probability when frequency range is not present；PdRepresent the correct detection probability in the presence of idle frequency range.
Secondly, in order to describe the frequency band use state that cooperation cell is concentrated, setting cooperation cell concentrates four kinds of frequency bands to use
State：Idle true, idle false, busy true, busy vacation；For example, if state " idle true " represents that the frequency band is in idle condition really；
State " idle false " represents that the frequency range is in busy state, still, and cognitive frequency spectrum detection technology for detection result is but idle shape
State.
Finally, our setup parameter γ and β are state transition probability, for example, " busy vacation " represents that current idle frequency range is
Busy condition, but testing result is idle condition, therefore, the probability of " busy vacation " mainly includes two parts：" idle false " conversion
For probability (1- γ) P of " busy vacation "fSelf transition probability γ P of " busy vacation "f；Again th time slot of jth is calculated by formula 2
In detect the probability of idle frequency rangeThe frequency band detected by the calculating of formula 3 in th time slot of jth is in busy
Shape probability of state
In formula 2,3,Represent in the first of th time slot of jth
The frequency range in stage beginning detects the probability of non-idle condition, wherein,Represent the previous time slot of th time slot of jth
In detect the probability of idle frequency range, γ represents probabilityTransition probability, β represented in th time slot of jth
The probability of idle frequency range shape is can't detect in previous time slotState transition probability.
S30：Auction stage, the auction stage includes procedure below
S31：Buyer is that the CEUE being determined is concentrated in the cooperation cell in CoMP system, and seller is that cooperation cell concentration possesses
ENB (eNodeB, enhanced base station) in the user equipment of idle frequency range, cooperation cell is used as the center in whole cooperation cell
Unit, in auction process, central location can not only connect the eNB of other in cell, and frequency spectrum warp is also played the part of simultaneously
The role of discipline people, is responsible in the dynamic auction process of frequency range, auction process, and the eNB delimited in time slot, cooperation cell is in turn
The role of frequency spectrum broker is served as in each time slot；
That is, in CoMP system, the eNB in each cell can be single as the center in whole cooperation cell
Member, in auction process, central location can not only connect the eNB of other in cell, and frequency spectrum manager is also played the part of simultaneously
The role of people, is responsible for the dynamic auction process of frequency range；Central location can be by interface X2 back haul link obtain cooperation it is small
Other eNB information feedback in area, the information feedback refers mainly to CQI (channel quality
Indicator) the feedback of value；Central location is according to the above-mentioned information feedback situation of back haul link in cooperation cell
User carry out Combined Treatment, the interference signal that user receives is converted into useful signal, user in lifting cooperation cell
Data throughout；In auction process, the eNB in cooperation cell serves as central location in turn, often carries out a wheel auction, and eNB is pressed
Cell rotation plays the part of the role of central location.
S32：Consider the presence of the situation of imperfect frequency spectrum detection in real process, the free time is such as detected in time slot
Frequency range, just proceeds by spectrum auction；As do not detected idle frequency range in time slot, then without spectrum auction, its
Intermediate frequency spectrum auction is auctioned using sequential auction scheme, is specially：
First, in the beginning of each time frame, it is determined that the time span that idle frequency range to be auctioned and CEUE should be detected,
Set idle frequency range collection to be auctioned and be combined into C={ c1,c2,c3...cs}；
Then, eNBs of each CEUE into respective cooperation cell sends frequency spectrum detecting result, and each CEUE is to each frequency range
Evaluated, set CEUE to the evaluation function of frequency range as formula 4：
xti=Cj·Dti·(T-τ) (4)
In formula 4, CjRepresent j-th of idle frequency range in idle frequency range set, DtiRepresent the buyer residing for oneself
Unit data flow in cooperation cell, T represents the length of transmission frame, and τ represents the time span of frequency range detection；
Finally, the eNB of the cooperation cell collection collects the estimate of each buyer, and obtains the utility function of buyer：When not
Consider CEUE between interfere in the case of, the revenue function such as formula 5 of buyer：
Vti=xti-bti (5)
In formula 5, xtiRepresent not consider the appraisal in the case of disturbing, btiRepresent t-th of CEUE in i-th of cooperation cell
Appraisal to j-th of idle frequency range；Between considering CEUE interfere situation after, the revenue function such as formula 6 of buyer：
Vti=h (xti)-bti (6)
In formula 6, h (xti) represent do not consider buyer interfere in the case of appraisal, h (xti)<xti, set Y1=max
(x21,....,xN3), G (Y1≤ y)=F (xti≤y)N-1, wherein, G () and F () represent Y respectively1And xtiCumulative distribution
Function, then Y1Probability density function be expressed as formula 7：
g(xti)=(3N-1) f (xti)[F(xti)]3N-1 (7)
In formula 7, f (xti) represent appraisal xtiProbability density function, then each buyer h (xti) expected revenus mR(xti)
For formula 8：
S33：Optimal bid of setting buyer is the function of their appraisals, with B (xti) represent optimization function of bidding, pass through
To maximizing mR(xti) on the b that bidstiDerivation, the function B (x that bid after must optimizingti) it is formula 9：
S34：Auction is carried out to idle frequency range using sealed first-price auction scheme：
The collaboration user equipment that cooperation cell is concentrated carries out auction to the frequency range in idle frequency range set, by the competitive bidding of oneself
Price sealed submits to the eNB in the set of the cooperation cell, and in each time slot, bid soprano to some idle frequency range
The right to use of the frequency range in this time slot will be obtained；The frequency range that CEUE is obtained by auction, and carried out using CoMP-JP technologies
Data transfer.
Further, the auction process is synchronous with frequency spectrum detection is carried out, and frequency spectrum detection is carried out in each time slot,
And be put into idle frequency range in idle frequency range set C to be auctioned, and the incipient stage in time slot carries out frequency range auction.
Spectrum auction side based on imperfect frequency spectrum detection in the CoMP system of the embodiment of the present invention, in the starting stage,
First, the cooperation cell sub-clustering mode in CoMP system is set, specifically chosen fixed three cooperation cells set, and pass through
The CQI value fed back and decision threshold α carry out CCUE and CEUE division in the set of cooperation cell, and using the CEUE of judgement as
The collaboration user equipment that cooperation cell is concentrated, these collaboration user equipment are defined as buyer.Then into frequency spectrum detection rank
Section, in CoMP system, idle frequency spectrum detection is carried out using cognitive frequency spectrum detection technology, collects idle frequency range progress auction accurate
Standby, if frequency range is detected as idle condition, we will carry out spectrum auction；If frequency range is detected as busy condition, without frequency
Spectrum auction.Enter after the auction stage, it is contemplated that the situation of imperfect frequency spectrum detection, and carried out using Markov method model
Mathematical modeling, then determines auction three elements, line frequency section auction of going forward side by side, and specific three elements determination mode is：Judge that CEUE is set
For buyer, the user that frequency spectrum detection possesses idle frequency range is set to seller, sets the eNB of cooperation cell concentration as frequency spectrum broker,
The eNB is responsible for whole frequency range auction process.Spectrum auction is synchronous with frequency spectrum detection process, as long as detection is in some time slot mistake
The available free frequency range of journey, just starts frequency range auction, sealing is collected buyer and bidded, and selects the highest bidder in the idle frequency range to be
Winner, and this idle frequency range is distributed into the highest CEUE that bids during the time slot.The spectrum auction method of the present embodiment,
Laminating practical communication application scenarios, the bid of bidding for optimizing buyer lifts the availability of frequency spectrum of CoMP system, strengthening system
Data throughout.
The spectrum auction method based on imperfect frequency spectrum perception in CoMP system of the present embodiment, it is contemplated that CoMP system
In the intrinsic static spectral method of salary distribution and faulty frequency spectrum perception communication scenes, and Game Theory application background, one
Aspect, by founding mathematical models, the imperfect frequency spectrum detection problem in CoMP system, the opposing party are described using Markov Chain
Face, in CoMP system, establishes the spectrum auction model based on imperfect frequency spectrum detection, designs buyer, seller, frequency spectrum manager
People, and optimize buyer's revenue function, it is finally, synchronous with frequency spectrum detection, according to conditions of auction, utilize sealed first-price auction side
Case is auctioned idle frequency band in time slot, improves the availability of frequency spectrum of CoMP system, and then improve the entirety of system
Handling capacity.
Claims (5)
1. the spectrum auction method based on imperfect frequency spectrum detection, comprises the following steps in a kind of CoMP system：
S10：Starting stage, the starting stage includes procedure below
In CoMP system, static cell sub-clustering is carried out, most strongly disturbing cell is merged, from the fixation of multiple cells
Cooperation cell collection, and the collaboration user equipment in each cooperation cell is set to be N number of；
S20：Frequency spectrum detection stage, the frequency spectrum detection stage includes procedure below
In CoMP system, idle frequency spectrum detection is carried out using cognitive frequency spectrum perception technology, idle frequency range is collected and carries out auctioning accurate
It is standby, if frequency range is detected as idle condition, spectrum auction is carried out in the time slot.
S30：Auction stage, the auction stage includes procedure below
S31：Buyer is that the CEUE being determined is concentrated in the cooperation cell in CoMP system, and seller is that cooperation cell concentration possesses the free time
During eNB in the user equipment of frequency range, cooperation cell is frequency spectrum broker, auction process, delimit in time slot, cooperation cell
ENB the role of frequency spectrum broker is served as in each time slot in turn；
S32：Auctioned using sequential auction scheme：
First, in the beginning of each time frame, it is determined that the time span that idle frequency range to be auctioned and CEUE should be detected, setting
Idle frequency range collection to be auctioned is combined into C={ c1,c2,c3...cs}；
Then, eNBs of each CEUE into respective cooperation cell sends frequency spectrum detecting result, and each CEUE is carried out to each frequency range
Appraisal, sets CEUE to the evaluation function of frequency range as formula 4：
xti=Cj·Dti·(T-τ) (4)
In formula 4, CjRepresent j-th of idle frequency range in idle frequency range set, DtiRepresent cooperation of the buyer residing for oneself
Unit data flow in cell, T represents the length of transmission frame, and τ represents the time span of frequency range detection；
Finally, the eNB of the cooperation cell collection collects the estimate of each buyer, and obtains the utility function of buyer：When not considering
In the case of interfering between CEUE, the revenue function such as formula 5 of buyer：
Vti=xti-bti (5)
In formula 5, xtiRepresent not considering the appraisal under disturbed condition, btiRepresent t-th of CEUE in i-th of cooperation cell to
The appraisal of j idle frequency range；Between considering CEUE interfere situation after, the revenue function such as formula 6 of buyer：
Vti=h (xti)-bti (6)
In formula 6, h (xti) represent do not consider buyer interfere in the case of appraisal, h (xti)<xti, set Y1=max
(x21,....,xN3), G (Y1≤ y)=F (xti≤y)N-1, wherein, G () and F () represent Y respectively1And xtiCumulative distribution
Function, then Y1Probability density function be expressed as formula 7：
g(xti)=(3N-1) f (xti)[F(xti)]3N-1 (7)
In formula 7, f (xti) represent appraisal xtiProbability density function, then each buyer h (xti) expected revenus mR(xti) it is public affairs
Formula 8：
S33：Optimal bid of setting buyer is the function of their appraisals, with B (xti) represent optimization function of bidding, by most
Bigization mR(xti) on the b that bidstiDerivation, the function B (x that bid after must optimizingti) it is formula 9：
S34：Auction is carried out to idle frequency range using sealed first-price auction scheme：
The CEUE that cooperation cell is concentrated carries out auction to the frequency range in idle frequency range set, and the bidding price of oneself is sealed and submitted
ENB in gathering to the cooperation cell, in each time slot, the soprano that bidded to some idle frequency range will obtain the frequency range
The right to use in this time slot；The frequency range that CEUE is obtained by auction, and carried out data transmission using CoMP-JP technologies.
2. the spectrum auction method based on imperfect frequency spectrum detection in CoMP system as claimed in claim 1, it is characterised in that
In step S10, by the feedback of the CQI value of user equipment, and set threshold value α to determine the collaboration user of cooperation cell concentration
Equipment；First, it is assumed that the feedback that cooperation cell is concentrated is perfect feedback, then, divided according to formula 1 in the concentration of cooperation cell
Heart user equipment and edge customer equipment (CEUE, cell edge user equipment)：
In formula 1, CQItiRepresent the CQI feedback value of t-th of user equipment in current i-th of cooperation cell；CQImaxRepresent current
The CQI maximum feedback values for the user equipment that cooperation cell is concentrated；α represents to judge the threshold value that user equipment is concentrated in cooperation cell；
Finally, the CEUE in the cooperation cell is counted, and the CEUE is set to the collaboration user equipment that cooperation cell is concentrated.
3. the spectrum auction method based on imperfect frequency spectrum detection in CoMP system as claimed in claim 1, it is characterised in that
In step S20, the use that frequency band is idle or busy condition is carried out by setting up markovian Statistical Probabilistic Models
State description, detailed process is：
First, four kinds of faulty frequency spectrum perception probability are set with：PfRepresent probability of false detection；PmDetection probability is missed in expression；PuTable
Show the correct detection probability when frequency range is not present；PdRepresent the correct detection probability in the presence of idle frequency range；
Secondly, four kinds of frequency band use states are concentrated in setting cooperation cell：Idle true, idle false, busy true, busy vacation；
The probability that idle frequency range is detected in th time slot of jth is calculated by formula 2 againCalculate and detect by formula 3
Frequency band in th time slot of jth is in the probability of busy condition
In formula 2,3,Represent the initial rank in th time slot of jth
The frequency range of section detects the probability of non-idle condition, wherein,Represent to examine in the previous time slot of th time slot of jth
The probability of idle frequency range is measured, γ represents probabilityTransition probability, β represented in the previous of th time slot of jth
The probability of idle frequency range shape is can't detect in time slotState transition probability., γ and β represent that state transfer is general
Rate.
4. the spectrum auction method based on imperfect frequency spectrum detection in CoMP system as claimed in claim 3, it is characterised in that
In step S20, as do not detected idle frequency range in time slot, then without spectrum auction.
5. the spectrum auction method based on imperfect frequency spectrum detection in CoMP system as claimed in claim 1, it is characterised in that
In step S34, in step S34, the auction process is synchronous with frequency spectrum detection to be carried out, and is carried out in each time slot
Frequency spectrum detection, and idle frequency range is put into idle frequency range set C to be auctioned, and the incipient stage in time slot enters line frequency
Section auction.
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| CN109756981A (en) * | 2019-01-22 | 2019-05-14 | 北京电子工程总体研究所 | A kind of battlefield radio spectrum resources distribution method and system based on auction mechanism |
| CN110381447A (en) * | 2019-08-23 | 2019-10-25 | 广西大学 | Wireless frequency spectrum cut-in method and system based on block chain |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109756981A (en) * | 2019-01-22 | 2019-05-14 | 北京电子工程总体研究所 | A kind of battlefield radio spectrum resources distribution method and system based on auction mechanism |
| CN109756981B (en) * | 2019-01-22 | 2023-10-13 | 北京电子工程总体研究所 | Battlefield wireless spectrum resource allocation method and system based on auction mechanism |
| CN110381447A (en) * | 2019-08-23 | 2019-10-25 | 广西大学 | Wireless frequency spectrum cut-in method and system based on block chain |
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