CN110072215A - A kind of multiple dimensioned dynamic frequency spectrum deployment scheme under heterogeneous network environment - Google Patents
A kind of multiple dimensioned dynamic frequency spectrum deployment scheme under heterogeneous network environment Download PDFInfo
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- CN110072215A CN110072215A CN201810066110.6A CN201810066110A CN110072215A CN 110072215 A CN110072215 A CN 110072215A CN 201810066110 A CN201810066110 A CN 201810066110A CN 110072215 A CN110072215 A CN 110072215A
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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
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
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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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Abstract
The present invention relates to multiple dimensioned dynamic frequency spectrum deployment (DSA) schemes under a kind of heterogeneous network environment, provide reliable solution to solve frequency spectrum crisis.The invention proposes the multiple dimensioned DSA frames of the heterogeneous network of a software definition (HetNets), and on a microscopic scale, we formulate the pricing strategy of small markers frequency spectrum distribution based on active user demand.On a macroscopic scale, the difference between average transmission rate achieved and required is used as feedback signal, realizes minizone spectral coordination to change according to the big markers of business demand.Next, being illustrated to four kinds of typical case scenes of proposal frame, to illustrate its potential income, and its feasibility is verified by case study.
Description
Technical field
The invention belongs to wireless communication fields, and in particular to the multiple dimensioned dynamic frequency spectrum deployment under a kind of heterogeneous network environment
(DSA) business of scheme, the change in time and space in heterogeneous network adaptively to match frequency spectrum resource offer and software definition needs
It asks.By dexterously managing the pricing strategy of both macro and micro frequency spectrum distribution, the program can support super-intensive network, multiple access side
Edge calculates, the plurality of application scenes such as space-air-ground integration and machinery compartment (M2M) communication.Simulation result in case study shows
The program can effectively improve user satisfaction, improve network performance.
Background technique
In recent years, due to Internet of Things application, the data traffic of the new applications such as augmented reality and reality-virtualizing game generation
Explosive increase, the demand to frequency spectrum resource are increasing rapidly.On the other hand, frequency spectrum is considered as scarce resource.Therefore, fastly
Gap between the data traffic demand that speed increases and limited frequency spectrum resource, which is growing, forces wireless service provider with more
Efficient mode utilizes frequency spectrum.Due to the development of cognitive radio technology, dynamic frequency spectrum deployment, which has proved to be, overcomes frequency spectrum short
Scarce promising method.In most countries, radio-frequency spectrum is generally by supervision mechanism or governability.Traditional
Under static spectral allocation strategy, each authorized spectrum band is assigned to wireless service provider, is then used by its authorized user.It gathers around
There is the wireless service provider of spectral band to be referred to as primary service provider, and there is the license operated on a certain spectral band
The user of card is referred to as main users (PU).Static spectral distribution may be relatively inefficient, because spectrum utilization is not suitable with data industry
The quick change in time and space of business demand.As a result, some radio-frequency spectrums are possibly even idle or under-utilized in urban area, i.e.,
So-called frequency spectrum cavity-pocket or white space.
, can be with perceived spectral cavity by the realization of dynamic frequency spectrum deployment, and allow unauthorized user (hereinafter referred to as
Secondary user (SU)) in a manner of chance utilize it, without to main users generate harmful interference.In this way, frequency spectrum can be by network
Entity itself is dynamically shared, and without regard to adjuster, and is expected the more efficient availability of frequency spectrum.
In particular, multiple dimensioned dynamic frequency spectrum deployment scheme can easily with emerging software defined network (SDN) frame
Structure integrates, and provides flexible network management, by decoupling network control planes and physical network topology, realizes network
Programmability.Therefore, can easily realize a series of network-controls and administrative mechanism (for example, service management, power control and
Frequency spectrum distribution), without carrying out material alteration to physical network component.In addition, networking component can pass through Centralized Controller phase
Mutually negotiate, so as to adjust control strategy in real time.With the separation of service provision and physical infrastructure, mobile virtual network
The accessible virtual resource of operator, and dispose under Service Level Agreement the application program of oneself.
However, realizing that multiple dimensioned DSA still suffers from several keys in the heterogeneous network (HetNets) of software definition
Challenge.Secondary user can therefrom be benefited by damaging network system, so they are always selfish.If without correctly motivating
The selfish behavior of mechanism, secondary user may will be greatly reduced spectrum utilization efficiency.For example, utilizing frequency spectrum resource in a manner of oneself
Selfishness time user may result in other honest user frequency spectrum resource it is insufficient.Another situation is that the secondary use of each selfishness
Family is only concerned the interests of oneself, increases transimission power, to reach higher transmission rate, to increase the interference of whole network
It is horizontal.
In order to provide a solution, price is a powerful tool, can hit the improper activity of user, and divide
The user for most paying attention to them is given with resource.For example, user can be according to the stock number of occupancy or the interference volume of generation come charging.
Well-designed pricing scheme can instruct time user to cooperate with one another, and utilize rare frequency spectrum resource in an efficient way.Dynamically
The pricing scheme of frequency spectrum can be divided into two classes: the price based on optimization and the price based on game theory.In the price based on optimization
In, frequency spectrum distribution is to formulate as the optimization problem be somewhat prohibitive, and optimal pricing is as making objective function
What the solution for maximizing or minimizing was derived.In comparison, it is different to be more suitable for processing for the price based on game theory
Frequency spectrum assignment problem between multiple entities of target, and the solution of single optimization can be provided for each entity.
Summary of the invention
In the present invention, in the HetNets environment for having studied software definition the optimal pricing of above-mentioned multiple dimensioned DSA scheme and
On the basis of frequency spectrum Decision of Allocation, the pricing strategy of a secondary service provider is proposed, is mentioned with the miniature service of Dynamical capture
For the demand of quotient on a microscopic level, and a feedback mechanism is provided and is rented on a macroscopic level from primary service provider to adjust
Frequency spectrum quantity.Firstly, we classify to the latest developments and development of multiple dimensioned DSA.Then, we are in software definition
Heterogeneous network (SDN) in develop a multiple dimensioned DSA scheme based on price, and illustrate respective technical advantage.Next,
Four typical case scenes of scheme are proposed to show potential benefit, and feasibility is demonstrated by case study.Specifically
Process is as follows:
1) in order to sufficiently indicate the advantage of multiple dimensioned DSA in SDN, we have proposed a frame as shown in Figure 1, the frame packets
Include the license master base station (PBSs) possessed by primary service provider, the unlicensed assistant base station that secondary service provider possesses
(SBSs) and centralized frequency spectrum agent.The specific effect and functional interpretation of each entity are as follows.
PBS is a fixed infrastructure network component, possesses the frequency range of many licenses, and provide connection clothes for PU
Business.
SBS or fixed infrastructure network component, by PBS rent frequency spectrum access permission card come for its
SU provides service.
Frequency spectrum agent is a central network entity, can be considered as the extension of SDN controller.Specifically, frequency spectrum
Intermediary safeguards the global information of HetNets, the frequency spectrum share being responsible between different SBS.
The design principle of multiple dimensioned DSA scheme under this heterogeneous network environment based on price is summarized as follows:
Micro-scale: since inherent delay existing between SBS and frequency spectrum agent may result in the longer response time,
Price and frequency spectrum Decision of Allocation for each SBS should based on some prompting messages (such as instantaneous channel conditions, interference level,
Transmission rate request etc.).Price incentive user adjust frequency spectrum usage behavior, this can by explore the method based on optimization, or
The combination of the theoretical method of person's game theory or the two is developed.
Macro-scale: according to the spectrum requirement of each SBS, making each SBS in terms of concentrating frequency spectrum intermediary can be rented
The decision of how many frequency spectrum.Gap between usable spectrum total amount and actual user's demand can be used as feedback to control minizone frequency spectrum
Coordinate.In addition, the inter-cell interference that frequency spectrum share generates can no longer be ignored, for more in the optimization process of macrocell DSA
A SBS coexists, it should maintain certain threshold value or less.
2) example of the optimal pricing strategy of multiple dimensioned DSA in SDN, concept can be shown by using auction system
Structure is as shown in Figure 1.On a microscopic scale, it will be assumed that frequency spectrum distributes to SU by time/frequency source block (RB), if polymerization is dry
The tolerable threshold value lower than PU is disturbed, then each can by randomness be utilized.Moreover, each SU can be transported on multiple RB
Row, to realize higher spectrum efficiency.SBS signs a contract with PBS, and the frequency spectrum access permission for renting N number of RB is demonstrate,proved to service it
SU.The bandwidth of each RB is B0.In addition, existing in the coverage area of SBS has data rate is limited to require to be rkK SU,
Wherein k ∈ { 1,2, K }.
SU monitors the service condition on each RB.If detecting that PU is effective on RB, the uplink of SU transmits function
Rate and data rate are all by the constraint interfered in PBS tolerance limit, and downlink data rate is received by from PBS
The influence for the interference arrived.That is, the SU total throughout realized by random reuse RB depends greatly at any time
Between fast-changing channel condition.
It interferes to concentrate on the controller between SBS and coordinate, therefore the interference from adjacent S BS can be ignored and phase will be come from
The interference of adjacent SBS is maintained at defined threshold value or less.Enable puAnd plRespectively indicate in SBS and PBS allows to emit on each RB
Power；WithRespectively indicate the channel gain from the SUk on SBS and PBS to RB n；σ2It is Background Noise Power.
plIt is the transmission power of the permission distributed on each RB in PBS.The data rate for occupying k-th of SU of n-th of RB is
Then the best bid of RB n is
There is a possibility that SU k* of best bid is won using RB n right, and the price of the high bid of Zhi Fuyu second, by
μnIt is expressed as
3) Fig. 2 shows the step of RB by all leases distributes to SU.Firstly, the RB of all leases is merged into a RB
Then library is individually assigned to an auction winner, until library is emptying.Similarly, all SU are managed by SU depositary management, from wherein one by one
SU is taken out, they need to be assigned enough RB to meet its data-rate requirements rk, i.e.,
In formula, xk,nIt is RB distribution indicator.If RB n is allocated to SU k, xk,nIt is 1, otherwise xk,nIt is 0.
On a macroscopic level, a kind of feedback control mechanism is devised for frequency spectrum intermediary, it can be according to big markers spectrum requirement
Dynamic adjustment frequency spectrum distribution.Closed loop feedback and control process are as shown in Figure 3.Between average transmission rate obtained and required
Difference reflect the imbalance between available RB and actual user's demand, be used as priori knowledge to instruct following frequency spectrum point
Match.Specifically, enablingThe expression stageObtained in the difference with desired average transmission rate, andIndicate next stageIn the RB quantity redistributed.It should be noted that any macroscopical frequency spectrum distributes rank
Section, such as, all include a large amount of time slot.It is assumed that there are relationships between gap and the quantity of the RB redistributed, i.e.,, then
The distribution of macroscopical frequency spectrum is determined as.In the stageIn available total RB quantity be adjusted to
Therefore, if correctionIt is positive, then in the stageIn distribute to SBS m RB quantity will increase.In view of the presence of multiple SBS, if frequency spectrum intermediary does not have sufficient amount of RB to meet the needs of all SBS, that
It must consider the fairness problem between SBS simultaneously in the distribution of macroscopical frequency spectrum.Maximum-minimum equity criterion is one normal
Standard.Generally, if any RB distribution will not all reduce the RB quantity for the SBS that less RB is assigned in those,
Then think that one group of RB distribution is to meet maximum-minimum equity criterion.
5) about our BROAD SUMMARY, as shown in figure 4, there are mainly four types of main application scenarios, illustrate as
Under.
Super-intensive network (UDNs): due to the spatial reuse of usable spectrum resource, cell densification is to offer large capacity
Frequency spectrum has tremendous contribution.The scheme proposed is conducive to realize and development scale DSA in UDNs.It is fixed especially to modify
Valence scheme, the co-channel interference of the use cost and generation of taking into account frequency spectrum resource adverse effect caused by adjacent area, to be user
Provide the distribution of microcosmic frequency spectrum and power control combined optimization scale of a customer-centric.In addition, also reflecting each
The price of the availability of cell redundancy frequency spectrum resource can also be used as feedback by controller to adjust the big rule between neighboring community
Mode spectrum is coordinated.For example, the huge spread in cell between frequency spectrum supply and demand, it is high to will lead to price of spectrum in auction process, this
It requires to distribute more frequency spectrum resources for this slight area, price is made to return to reasonable level.
Multiple access edge calculations: edge calculations can be implemented around data processing and storage in user, to support to delay
Sensitive and computation-intensive application provides effective solution.However, connection, ultralow delay on a large scale in Internet of Things application
Also become the new bottleneck of edge calculations with the explosive demand of high reliability.For example, when a large amount of Internet of Things of a hot spot region
When equipment may attempt to be connected to server and unload calculating task simultaneously, this large amount of connection request will seriously affect network
Access ability, and eventually lead to network performance degradation.Our scheme then provides an effective solution route；According to connection
Demand dynamic adjusts the offer and adjustment of frequency spectrum resource.In the distribution of small-scale frequency spectrum, it is delay tolerance that hour, which marks pricing strategy,
User postpones connection request and provides important excitation, demand effectively can be transferred to non-peak period from peak period, and protect
Demonstrate,prove the quality of service requirement of delay-sensitive application.On the other hand, macroscopical frequency spectrum distribution is also contributed to by between exploration different community
Extensive load change to alleviate cell-overload problem.By the resource allocation underused in adjacent light load cell to heavy burden
Lotus cell, to improve concatenation ability.
Space-air-ground integration: infrastructure, unmanned vehicle are wirelessly electrically accessed by being mounted on mobile-satellite
(UAV) and vehicle has become can provide the space-air-ground integration system of on-demand network capacity.The advantage of empty world normal form
Monotechnics are not relied on, but it is complementary.However, due to unmanned plane/vehicle distribution inhomogeneities, frequency spectrum distribution is asked
Topic becomes more complicated.Scheme proposed by the invention then can be realized coarseness and the distribution of fine-grained frequency spectrum.Macroscopical frequency spectrum
Distribution can be adjusted according to the large scales information such as unmanned plane/vehicle scheduling, Move Mode, route planning, and microcosmic frequency spectrum point
It is optimized with the small time scale informations such as user's transient demand are then based on.For example, in multiple dimensioned DSA framework, unmanned plane can be with
Regard a kind of special shape of the SBS with sighting distance (LoS) connectivity and wide covered ground as, it can significant reduction antenna use
The outage probability at family, and optimize frequency spectrum distribution.
Machinery compartment (M2M) communication: between the equipment such as PM2.5 sensor, intelligence instrument, intelligent electronic device (IED)
The machine-type communication that is characterized of autonomous data exchange since random access protocol has had resulted in serious overload problem.When big
When the equipment of amount tries concurrently to establish connection, the probability of success of random access will be drastically reduced.Moreover, being coexisted in consolidated network
Huge apparatus usually have different requirements to handling capacity, time delay, reliability and connectivity, scheme proposed by the invention is solution
Certainly above-mentioned random access problem provides effective solution approach.Data by exploring SDN control separation, physics type device
Multiple virtual networks can be virtualized into according to quality of service requirement.Then, high-level service matter is enforced by Centralized Controller
Amount requires, and distributes frequency spectrum resource between the virtual network based on customer center pricing scheme.Finally, by QoS requirement with
For the gap between amount of frequency spectrum actually distributed as closed loop feed back, dynamic adjusts frequency spectrum distribution, promotes internetwork coordination.
Detailed description of the invention:
Fig. 1 is the multiple dimensioned DSA frame explanatory diagram based on price.
Fig. 2 is the algorithm flow chart of the DSA under micro-scale.
Fig. 3 is the algorithm flow chart of the DSA under macro-scale.
Fig. 4 is the main application scenario diagram of multiple dimensioned DSA based on price.
Fig. 5 is the relational graph between user utility and number of users.
Fig. 6 is the relational graph between user satisfaction and cost performance.
Specific embodiment
Embodiments of the present invention are divided into two steps, and the first step is to establish model, and second step is the implementation of algorithm.Its
In, the model of foundation is as shown in Figure 1, it is complied fully with the multiple dimensioned DSA frame based on price in summary of the invention；And algorithm
Implementation process is provided by Fig. 2 and Fig. 3, they are complete with microcosmic, the macro-scale DSA algorithm steps in summary of the invention based on price
It is corresponding.Fig. 1 is the multiple dimensioned DSA frame explanatory diagram based on price；Fig. 2 is the flow chart of DSA algorithm under micro-scale；Fig. 3 is
The algorithm flow chart of DSA under macro-scale.
Specific embodiment is divided into two parts by us, and the cumulative distribution function of user utility and user satisfaction is used
To measure the performance of proposed framework.Relationship between first part's paper user utility and number of users, second
Divide the relationship pointed out between user satisfaction and cost performance.We are arranged one by single location based service module herein
(LBS), the scene of two service module (UBS) and K the user compositions based on user.LBS according to frequency spectrum resource demand not
Together, the dynamic coordinate being responsible between different Microcells, UBS are responsible for being that victor distributes frequency spectrum resource according to auction result.It is all
The user of demands of individuals and budget be all it is randomly ordered, their optimal objective is small to obtain resource with optimal effectiveness
Block (RB), it means that it should be as maximum as possible that the project evaluation and user, which pay the difference between the amount of money of auctioner,.?
In the same Microcell, the user for not meeting frequency spectrum resource demand should be in Fig. 5 and the double-layer layered shown in fig. 6 based on price
Fair competition is carried out to unallocated frequency spectrum resource in dynamic frequency spectrum deployment framework.The user of best bid is obtained with the second high price
The RB that must be auctioned, and the victor for obtaining enough RB is removed from UE list.In addition, the same Microcell pours in greatly simultaneously
User is measured, will lead to different user density to the difference of frequency spectrum resource demand.LBS carries out dynamic association according to difference between UBS
It adjusts, it is under-utilized to alleviate frequency spectrum in low-density microcellulor, spectrum efficiency is improved from macroscopic perspective.
Finally scheme simulation result such as Fig. 5 and Fig. 6 that we obtain.Wherein Fig. 5 is between user utility and number of users
Relationship, relationship of the Fig. 6 between user satisfaction and cost performance.The contribution of this work is summarized as follows.With traditional single layer
DSA scheme is compared, the combination of macrocell DSA and minute yardstick DSA, so that secondary service provider not only can be in transient channel item
Spectrum utilization efficiency is improved under part, the scale variation of frequency spectrum resource configuration transport need can also be adjusted flexibly according to the big time,
It does so and can effectively improve user satisfaction and raising network performance.
It is of the invention its object is to help to understand although disclosing specific implementation and attached drawing of the invention for the purpose of illustration
Content is simultaneously implemented accordingly, but it will be appreciated by those skilled in the art that: it is of the invention and the attached claims not departing from
In spirit and scope, various substitutions, changes and modifications are all possible.Therefore, the present invention should not be limited to most preferred embodiment and
Attached drawing disclosure of that, the scope of protection of present invention is subject to the scope defined in the claims.
Claims (3)
1. multiple dimensioned dynamic frequency spectrum deployment (DSA) scheme under a kind of heterogeneous network environment, providing for solution frequency spectrum crisis can
The solution leaned on, it is characterised in that:
1) hour target frequency spectrum on a microscopic scale, is formulated based on active user demand and distributes pricing strategy；
2) on a macroscopic scale, the difference between average transmission rate achieved and required is used as feedback signal, so as to
Changed according to the big markers of business demand and realizes minizone spectral coordination.
2. on a microscopic scale, formulating hour target frequency spectrum distribution price based on active user demand such as claim 1 step 1)
Strategy, which is characterized in that frequency spectrum distributes to SU by time/frequency source block (RB), if polymerization interference is lower than the tolerable threshold of PU
Value, then each can by randomness be utilized, moreover, each SU can be run on multiple RB, to realize higher frequency spectrum
Efficiency:
1) SBS and PBS signs a contract, and the frequency spectrum access permission for renting N number of RB is demonstrate,proved to service its SU, in addition, in the covering model of SBS
It encloses interior in the presence of with the limited requirement of data rate'sA SU occupies the data rate of k-th of SU of n-th of RB
For
For the bandwidth of each RB；WithRespectively indicate the permission transmission power in SBS and PBS on each RB；WithRespectively indicate from SBS and PBS toOnChannel gain；Indicate Background Noise Power；It is in PBS
In each RB on the transmission power of permission distributed, thenBest bid be
,
With best bidWin useA possibility that right, and the price of the high bid of Zhi Fuyu second, byTable
It is shown as
2) the step of RB of all leases being distributed into SU: the RB of all leases is 1. merged into the library RB, is then divided one by one
One auction winner of dispensing, until library is emptying；2. all SU are managed by SU depositary management, from SU is wherein taken out one by one, they need to be divided
With enough RB to meet its data-rate requirements, i.e.,
It is RB distribution indicator；IfIt is allocated to, thenIt is 1, otherwiseIt is 0.
3. as described in claim 1 step 2, on a macroscopic scale, between average transmission rate achieved and required
Difference is used as feedback signal, realizes minizone spectral coordination to change according to the big markers of business demand, which is characterized in that
For frequency spectrum, intermediary devises feedback mechanism, to realize the optimal frequency spectrum distribution of dynamic adjustment,
1) difference between average transmission rate obtained and required reflects between available RB and actual user's demand
Imbalance is used as priori knowledge to instruct following frequency spectrum distribution, it should be noted that any macroscopical frequency spectrum distributes rank
Section all includes a large amount of time slot, it is assumed that there are relationships between gap and the quantity of the RB redistributed, i.e.,, then
Obtained in the expression stage with the difference of desired average transmission rate；It indicates to redistribute in next stage
RB quantity,
In the stageIn available total RB quantity be adjusted to
If 2) correctedIt is positive, then the quantity that the RB of SBS m is distributed in the stage will increase, it is contemplated that multiple SBS
Presence, if frequency spectrum intermediary does not have sufficient amount of RB to meet the needs of all SBS, macroscopical frequency spectrum distribution in it is necessary
The fairness problem between SBS is considered simultaneously, and maximum-minimum equity criterion is a common standard, generally, if appointed
What RB distribution will not all reduce the RB quantity for the SBS that less RB is assigned in those, then it is assumed that one group of RB distribution is to meet most
Greatly-minimum equity criterion.
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| CN113573412A (en) * | 2021-06-28 | 2021-10-29 | 山东师范大学 | Spectrum dynamic allocation method, system, equipment and storage medium |
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