CN1917690A - Method for assigning dynamic frequency spectrum of multiple radio system based on dynamic boundary of virtual frequency spectrum - Google Patents
Method for assigning dynamic frequency spectrum of multiple radio system based on dynamic boundary of virtual frequency spectrum Download PDFInfo
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Abstract
The method comprises: according to current traffic of each shared radio system, determining a host system and a firstly-selected rental system, and according to its traffic state, variably and dynamically adjusting the virtual boarder of the host system and the boarder of the firstly-selected rental system so as to dynamically set the private spectrum of the host system, the private spectrum of the firstly-selected rental system and the shared spectrum of the shared spectrum pool. The spectrum needs of the host system user are satisfied in its private spectrum, and its corresponding firstly-selected rental system also rents the spectrum block in the private spectrum of the firstly-selected rental system; between the private spectrum blocks in same there is no need to set the guard band so as to decrease the numbers of guard band and improve the spectrum utilization.
Description
Affiliated technical field
The present invention relates to the frequency spectrum sharing method of multi radio communication system, especially the dynamic frequency spectrum deployment method under the multi-radio system frequency spectrum share environment.
Background technology
At serious day by day this bottleneck problem of radio spectrum resources shortage, can solve by reshuffle strategy and technological innovation based on radio system, thereby reach high efficiency of spectrum utilization.Frequency spectrum share notion based on software radio (Software Defined Radio:SDR) is proposed first by J.Mitola, and this technology makes distributes any frequency spectrum to become possibility at any time and any place.
The traffic of radio system is along with when and where constantly changes, yet the frequency spectrum of current most of radio systems all is to distribute according to the traffic of " peak value constantly ", therefore all fail to be fully used at the frequency spectrum resource of non-" peak value constantly ", cause waste.
In view of universal mobile telecommunications system (Universal Mobile Telecommunication System:UMTS) and terrestrial digital radio and television (Digital Video Broadcasting Terrestrial:DVB-T) system spectrum demand difference and overlapping in space in time, be easy to associate and make these two systems share same frequency spectrum.The distribution of frequency spectrum can dynamically be adjusted according to the demand of different time like this, and needn't distribute according to the traffic of " peak value constantly " of two systems, has saved frequency spectrum resource greatly.Simultaneously (1:00-7:00AM, this moment, UMTS and DVB-T traffic carrying capacity were all very little) provides frequency spectrum resource for the lease system of first-selection at dead of night.Except UMTS and DVB-T, also have many other main system and lease systems can carry out dynamic spectrum and share promptly so-called dynamic frequency spectrum deployment (DynamicSpectrum Allocation:DSA) strategy in the reality.
In order to reach the maximum utilization of frequency spectrum resource, the mandate of frequency spectrum must be flexibly.A kind of way that the present invention provides visit originally not belong to their frequency spectrum for lease system, main system also can be increased income by hiring out frequency spectrum simultaneously, thereby reaches the result of doulbe-sides' victory.
In the Borrow crow (Paul leaves) people of etc.ing " making up the dynamic frequency spectrum deployment in the restructural radio system " (" Dynamic spectrum allocation in composite reconfigurable wirelessnetworks; " IEEE Communication Magazine, vol.37, issue 2, pp.72-81, May2004.) mention in the paper in Britain and the U.S. and launched discussion the spectrum management policy, for example, " the frequency spectrum commercialization should be carried out in Britain as early as possible " advocated by British government, points out " broadcaster should have the ability and will not rent to other user with frequency spectrum " simultaneously; Frequency spectrum policy working group of the Federal Communications Committee of the U.S. (FederalCommunication Commission:FCC) has approved that also new frequency spectrum policy is to improving the potentiality that spectrum efficiency had.Yet, can possess shared ability in order to make network, existing rule must be made great adjustment.
In order to realize the multi-radio system frequency spectrum share, people such as crow has proposed dynamic spectrum and has shared scheme in the Borrow, comprise adjacent dynamic frequency spectrum deployment, be adjacent DSA (Contiguous Dynamic SpectrumAllocation), and burst dynamic frequency spectrum deployment, i.e. two kinds of methods of burst DSA (Fragmented DynamicSpectrum Allocation).
Adjacent DSA method is applicable to that the dynamic spectrum of two radio systems that frequency spectrum is adjacent is shared.Fig. 1 is the schematic diagram of fixed frequency spectrum distribution method (FSA), and Fig. 2 is adjacent DSA schematic diagram.Two adjacent frequency ranges are distributed to two different radio systems respectively among Fig. 1, Fig. 2, the frequency range that its Oxford gray takies for the RAN1 of system, and the frequency range that light gray takies for the RAN2 of system, the protection frequency band by blank parts between them is isolated.What the adjacent DSA method of Fig. 2 was different with the fixed frequency spectrum distribution method (FSA) of Fig. 1 is: the adjacent DSA of Fig. 2 can adjust two systems width of frequency range separately in the change dynamics ground of network traffic in difference constantly according to system, Fig. 1 then is that the fixed allocation frequency range is given different system, in case distribute, no matter system business amount size, bin width can not be adjusted, therefore adjacent DSA method and traditional fixed frequency spectrum distribution method comparison can be saved frequency spectrum resource.
It can also be seen that from Fig. 2 still there are some problems in adjacent DSA, it only is suitable for the frequency spectrum share of the adjacent radio system of frequency spectrum, and radio system can not arbitrarily increase the distribution of frequency spectrum, removes non-adjacent another system and discharges a part of frequency spectrum.Therefore, this scheme availability of frequency spectrum is still on the low side, and the fairness of spectrum allocation may is poor.
Fig. 3 is the schematic diagram of burst DSA.Burst DSA thinks that all different frequency spectrum blocks all are independent and sharable, and any radio system can use unappropriated arbitrarily frequency spectrum blocks at any time.
Different radio systems may be different to the demand of frequency spectrum.Equally, the protection frequency bandwidth between the different radio electric system is because the annoyance level difference also may be different.This method can realize dynamically sharing of idle frequency spectrum piece in a plurality of radio systems (being not limited to the radio system of adjacent spectra) frequency spectrum.For simplicity, adopt burst DSA to carry out the schematic diagram of spectrum allocation may only among Fig. 33 radio system RAN1, RAN2, RAN3.
The deficiency of this method is: because the interference between the different radio electric system, the control of burst DSA wants complicated compared with adjacent DSA.For fear of inter-system interference, adjacent different system between the RAN1 among Fig. 3, RAN2, the employed adjacent spectra piece of any two systems of RAN3, must be provided with protection frequency band (blank parts among Fig. 3).But, hire out and use for other lease system user at random because each system is the idle frequency spectrum piece that it is occurred at random.Therefore to distribute in its frequency spectrum be mixed and disorderly at random to the idle frequency spectrum piece hired out of main system, and can not make the same system use or the frequency spectrum blocks of renting concentrated relatively.Cause the protection number of frequency bands of all shared frequency spectrum blocks needs that main system hires out very big, the utilance of frequency spectrum resource remains further raising.
Uncle tongued bell Hu Beitusi (Petrus Hubertus) is at United States Patent (USP) " the frequency spectrum share scheme in the radio system " (Petrus Hubertus, Method and arrangement for spectrum sharing in a radiocommunication environment, Patent No.US 005907812A, May 25,1999) use by the fixing wireless channel (frequency spectrum blocks) of main system being divided into the user that littler subchannel (frequency spectrum blocks) unit directly offers lease system, thereby avoided the waste of the bandwidth of formation when the frequency spectrum blocks of main system is bigger than the frequency spectrum blocks of lease system.Fixed wireless channel (frequency spectrum blocks) scheme optimization of this scheme before relatively the availability of frequency spectrum, but the idle frequency spectrum piece of its taxi remains random distribution.For fear of the interference between the different system, need equally to add between a large amount of systems to protect frequency band, spectrum utilization is still insufficient.
Summary of the invention
Purpose of the present invention just provides a kind of multi-radio system dynamic frequency spectrum deployment method based on the dynamic virtual spectral boundaries, and the protection frequency band is few between this method system, availability of frequency spectrum height.
The present invention realizes that the technical scheme that its goal of the invention adopts is: a kind of multi-radio system dynamic frequency spectrum deployment method based on the dynamic virtual spectral boundaries, and this method is made up of following steps:
(1) determines the minimal frequency piece B of a plurality of radio systems
m, each radio system RAN
k, the mandate frequency spectrum of k ∈ [1, K] is [f
Ak, f
Bk], f wherein
AkFor authorizing the lower limit spectrum value of frequency spectrum, f
BkFor authorizing the upper limit spectrum value of frequency spectrum, will authorize frequency spectrum by minimal frequency piece B
mBe divided into N
k=B
k/ B
mIndividual unit, wherein B
k=f
Bk-f
AkFor authorizing the width of frequency spectrum; Each radio system RAN
kSet main system virtual boundary V according to historical record and current business amount
Dk, this border V
DkWith the lower limit spectrum value f of system
AkInterior frequency spectrum blocks is the privately owned frequency spectrum of main system, border V
DkWith the upper limit spectrum value f of system
BkInterior frequency spectrum blocks is for sharing spectrum pool.
(2) obtain each radio system RAN
kThe minimal frequency piece of current privately owned frequency spectrum is counted N
BkAccount for total minimal frequency piece and count N
kRatio be privately owned spectrum occupancy η
k=N
Bk/ N
k, all current η
k＜1 radio system is main system, wherein η
k≤ default threshold T H
kMain system then be main system more than needed; All current η
k=1 radio system and nothing authorize the system of frequency spectrum to be lease system, rent the idle frequency spectrum piece of main system when lease system has spectrum requirement and himself not to satisfy.
(3) main system more than needed selects the lease system of a current spectrum requirement amount maximum to be defined as its first-selected lease system from existing lease system; Border V is rented for selected first-selected lease system is provided with a first-selection in selected back in its shared spectrum pool
Pk, wherein first-selection is rented border V
PkWith the upper limit spectrum value f of system
BkInterior frequency spectrum blocks is the privately owned frequency spectrum of first-selected lease system, comprises N
PkIndividual minimal frequency piece B
mFirst-selection is rented border V
PkWith main system virtual boundary V
DkBetween frequency spectrum blocks for sharing spectrum pool; When this first-selection lease system need be rented frequency spectrum blocks, preferentially rent the interior frequency spectrum blocks of the privately owned frequency spectrum of first-selected lease system of corresponding main system more than needed.
Compared with prior art, the invention has the beneficial effects as follows:
Because the main system virtual boundary is determined according to the current business amount of radio system; be dynamic adjustable, and main system user's spectrum requirement is mainly concentrated satisfied in its privately owned frequency spectrum, need not to protect frequency band between these frequency spectrum blocks; advantage with adjacent DSA, the frequency spectrum resource utilization rate height.
Simultaneously, because the existence in frequency spectrum shared pond, its idle frequency spectrum piece can be hired out to any lease system and be used, and are not limited to the adjacent system of frequency spectrum, therefore it also has the advantage of burst DSA, and the idle frequency spectrum of all main systems can obtain effective, fair utilization.
The main system that the idle frequency spectrum number of blocks is many becomes main system more than needed; and the lease system that current business has the call is chosen as its first-selected lease system; and in the idle frequency spectrum pond of main system more than needed, set out the privately owned frequency spectrum of dynamic first-selected lease system; the spectrum requirement of this first-selection lease system is at first satisfied by the privately owned frequency spectrum of this first-selection lease system; also need not to be provided with the protection frequency band between these frequency spectrum blocks; make regular; a large amount of renting need not to protect frequency band between the frequency spectrum blocks; significantly reduce the quantity of protection frequency band; increase the usable spectrum resource, further overcome the shortcoming of burst DSA.
In a word, the present invention not only has the advantage of adjacent DSA and burst DSA, has taken into account fairness simultaneously, and apparent person has improved the availability of frequency spectrum.
Multi-radio system dynamic frequency spectrum deployment method based on the dynamic virtual spectral boundaries of the present invention can be taked following way more specifically:
(1) above-mentioned radio system RAN
kWith its state and the whole dynamically recordings of intrasystem frequency spectrum blocks operating position thereof in public shared frequency spectrum data storehouse; The state of radio system comprises that system type belongs to the corresponding relation of any and main system more than needed and first-selected lease system in main system, main system more than needed, lease system, the first-selected lease system; Frequency spectrum blocks operating position: comprise that all piece frequency spectrum blocks that main system virtual boundary, first-selection are rented in border and the shared spectrum pool thereof take situation between the two.
Main system is with its virtual boundary V
DkAnd the operating position dynamically recording of privately owned frequency spectrum blocks is in its local data base, and main system wherein more than needed also will write down first-selection and rent border V in this table
Pk
First-selected lease system is the operating position of the mandate frequency spectrum blocks of himself, with and the first-selection of the main system more than needed of renting rent border V
PkAnd the operating position of the privately owned frequency spectrum blocks of lease system at first, record in the local data base of first-selected lease system.
Other lease system only needs the operating position of the mandate frequency spectrum blocks of himself is recorded in its local data base, if but this lease system self does not have system's (use fully other people frequency spectrum) of any mandate private frequency spectrum, then need not set up this database.
When (2) main system that comprises main system more than needed has spectrum requirement, at first visit the main system local data base, the idle frequency spectrum piece in the privately owned frequency spectrum blocks of search main system has and then distributes it; Otherwise, visit public shared frequency spectrum data storehouse, the idle frequency spectrum piece in the shared spectrum pool of search and distribution native system; Still do not have the idle frequency spectrum piece if native system is shared in the spectrum pool, then search for and distribute other main system to share idle frequency spectrum piece in the spectrum pool; If still do not have the idle frequency spectrum piece, then interrupt by force and distribute this main system to share in the spectrum pool, near main system virtual boundary V
Dk, the frequency spectrum blocks that other lease system is just using.
When first-selected lease system had spectrum requirement, at first access local database was searched for local idle frequency spectrum piece of authorizing frequency spectrum, has and then distributes it; Otherwise the privately owned frequency spectrum blocks of first-selected lease system of the corresponding main system more than needed of search, if there is the idle frequency spectrum piece then to distribute it, if there is not the idle frequency spectrum piece then to visit public shared frequency spectrum data storehouse, search also distributes the idle frequency spectrum piece of sharing in the spectrum pool.
When other lease system has spectrum requirement, at first visit its local data base, the local idle frequency spectrum piece of authorizing frequency spectrum of search has and then distributes it; Otherwise, in the shared spectrum pool in public shared frequency spectrum data storehouse, search for and obtain the idle frequency spectrum piece.
(3) all systems are after distributing frequency spectrum blocks, all in local data base or public shared frequency spectrum data storehouse with distribution frequency spectrum blocks state be rewritten as and take; Business is finished no longer need use frequency spectrum, discharge frequency spectrum blocks after, all local data base and corresponding frequency spectrum piece must be rewritten as the free time, so as other system from local data base and obtain the idle frequency spectrum block message of current frequency spectrum at any time.
At first, employing can record the state of current all main systems and lease system and the user mode of frequency spectrum blocks thereof dynamic, complete and concisely with upper type; When radio system has business demand, by can and being assigned to corresponding frequency spectrum blocks by its priority level search with upper type, whether the mandate frequency spectrum of searching self as first-selected lease system earlier has the idle frequency spectrum piece, whether the privately owned frequency spectrum of searching again on the main system more than needed of its correspondence of first-selected lease system has vacant frequency spectrum blocks, searches shared spectrum pool then.This priority level makes and need not to protect the privately owned frequency spectrum blocks of frequency band preferentially to obtain using the utilance height of frequency spectrum; And the mode that this record distributes, during as the frequency spectrum blocks of system searching oneself, need access local database only, the memory capacity of required visit information amount and needed for record information is little between the system.In a word, can realize between the radio system dynamic spectrum share effective, quick and easy, accurate; Make the invention process easy, stable, reliable.
Secondly, the present invention can provide favorable service quality (QoS) for lease system: even because main system has spectrum requirement, but the frequency spectrum blocks of having distributed to lease system can not be switched at once to the main system use, unless entire spectrum has not had the idle frequency spectrum piece available.Therefore, the present invention can reduce the interruption rate that is forced to of lease system under the prerequisite that does not influence the main system performance, thereby provides good quality of service for lease system.
Above-mentioned main system is always authorized the lower limit spectrum value f of frequency spectrum from it
AkBegin upwards to use the idle frequency spectrum piece, up to arriving main system virtual boundary V
DkTill; After the spectrum requirement of first-selected lease system surpasses the mandate frequency spectrum of self, from its corresponding main system upper limit spectrum value f more than needed
BkThe idle frequency spectrum piece is got in beginning downwards, rents border V up to arriving first-selection
PkTill; When the idle frequency spectrum use is searched for by all systems in sharing spectrum pool; undertaken by burst dynamic frequency spectrum deployment (Fragment DSA) mode; for fear of interference; must increase the protection frequency band between the frequency spectrum blocks of adjacent system, the protection band bandwidth between any two systems can be from predefined protection frequency band matrix B G
(KxK)In obtain.
This mode make each system privately owned frequency spectrum, share the determining in order of spectrum pool, convenient.The system that guaranteed is effectively by privately owned frequency spectrum, the privately owned frequency spectrum of first-selected lease system of self authorizing in the frequency spectrum, share the priority of spectrum pool and use frequency spectrum blocks, improved the utilance of frequency spectrum the biglyyest, and when sharing the use of spectrum pool, then adopt ripe burst dynamic frequency spectrum deployment mode to carry out, make that the control of system is relative simple with distribution, convenient enforcement of the present invention.
Above-mentioned a kind of multi-radio system dynamic frequency spectrum deployment method based on the dynamic virtual spectral boundaries, it sets the main system virtual boundary and the first-selected concrete grammar of renting the border is:
(1) after each distribution of described main system or the release frequency spectrum blocks, dynamically adjusts main system virtual boundary V
Dk:
When the traffic carrying capacity increase of main system causes main system virtual boundary V
DkThe idle minimal frequency piece of interior privately owned frequency spectrum is counted N
FkDuring minimizing, if should free time minimal frequency number of blocks N
FkThe total minimal frequency piece of frequency spectrum privately owned with it is counted N
BkRatio be N
Fk/ N
Bk≤ default threshold ones TH
Bk1, then increase main system virtual boundary V
DkAnd upgrade data in its local data base, make the privately owned amount of frequency spectrum of main system increase; If current privately owned frequency spectrum minimal frequency piece is counted N
BkMake privately owned spectrum occupancy η
k=N
Bk/ N
k＞TH
k, then this main system no longer is a main system more than needed, if exist first-selected lease system this moment, then discharges it, simultaneously, upgrades the system state data of sharing in the frequency spectrum data storehouse.
When reducing, the traffic carrying capacity of main system causes main system virtual boundary V
DkThe idle frequency spectrum piece of interior privately owned frequency spectrum is counted N
FkDuring increase, if should free time minimal frequency number of blocks N
FkThe total minimal frequency piece of frequency spectrum privately owned with it is counted N
BkRatio be N
Fk/ N
Bk〉=default limit value the TH of wealthy family
Bk2, then reduce main system virtual boundary V
DkAnd upgrade data in its local data base, make the privately owned amount of frequency spectrum of main system reduce; If main system virtual boundary V
DkThe interior total minimal frequency piece of privately owned frequency spectrum is counted N
BkMake privately owned spectrum occupancy η
k=N
BK/ N
K≤ TH
k, then this main system becomes main system more than needed, should select one as its first-selected lease system from have the lease system that does not become first-selected lease system now, upgrades the system state data of sharing in the frequency spectrum data storehouse simultaneously.
If the traffic carrying capacity of main system increases or minimizing, but do not make the quantity N of the idle minimum spectrum piece of its privately owned frequency spectrum
FKSatisfy N
Fk/ N
Bk≤ TH
Bk1Perhaps N
Fk/ N
Bk〉=TH
Bk2, then keep main system virtual boundary V
DkConstant.
(2) after each distribution of described first-selected lease system or the release frequency spectrum blocks, dynamically adjust first-selection and rent border V
Pk:
When the traffic carrying capacity increase of first-selected lease system causes first-selection to rent border V
PkThe idle minimal frequency piece of interior privately owned frequency spectrum is counted N
PFkDuring minimizing, if should free time minimal frequency number of blocks N
PFkThe minimal frequency number of blocks N total with the privately owned frequency spectrum of first-selected lease system
PkRatio be N
PFk/ N
Pk≤ default first-selected threshold ones the TH of system
Pk1, then increase first-selection and rent border V
Pk, and upgrade data in its local data base, make the privately owned amount of frequency spectrum of first-selected lease system increase.
When reducing, the traffic carrying capacity of first-selected lease system cause first-selection to rent border V
PkThe idle minimal frequency piece of interior privately owned frequency spectrum is counted N
PFkDuring increase, if should free time minimal frequency number of blocks N
PFkThe minimal frequency number of blocks N total with the privately owned frequency spectrum of first-selected lease system
PkRatio be N
PFk/ N
Pk〉=default limit value the TH of wealthy family of first-selected system
Pk2, then reduce first-selection and rent border V
Pk, count N if reduce to the total minimal frequency piece of the privately owned frequency spectrum of first-selected lease system
PkCount N with total minimal frequency piece of corresponding main system
KRatio be N
PK/ N
K≤ default first-selected system door limit value TH
Pk, then discharging this first-selected lease system, corresponding main system is reselected new first-selected lease system according to the traffic carrying capacity of existing lease system, upgrades the data in its local data base simultaneously.
If the traffic carrying capacity of first-selected lease system increases or reduces, but does not make its first-selection rent the quantity N of the idle minimal frequency piece of the privately owned frequency spectrum in the border
PFkSatisfy N
PFk/ N
Pk≤ TH
Pk1Perhaps N
PFk/ N
Pk〉=TH
Pk2, then keep first-selection to rent border V
PkConstant.
Employing with upper type in real time according to the traffic carrying capacity of radio system, by predetermined value dynamically adjust the main system virtual boundary, first-selection is rented the border, and the system type of transformation radio system, both guaranteed each system's self dynamic spectrum requirement in real time, dynamic idle frequency spectrum piece with each system is used fully in time again, and the preferential use of energy privately owned frequency spectrum of assurance system self and the privately owned frequency spectrum of first-selected lease system.Make the present invention constantly in difference, all can accomplish frequency spectrum resource efficient, make full use of.
Above-mentioned multi-radio system minimal frequency piece B
mDefinite method be: at first according to each radio system (RAN) frequency spectrum blocks B
M1, B
M2... B
MKWidth and from protection frequency band matrix B G
(KxK)In protection frequency bandwidth B between any two RAN of obtaining
Gij, wherein i ≠ j and i, j ∈ [1, K] gets B
M1, B
M2... B
MKAnd B
GijGreatest common divisor, as the minimal frequency piece B of multi-radio system spectrum division
m=gcd (B
M1, B
M2... B
MK, B
Gij).
Like this, the minimal frequency piece of determined all radio systems is the frequency spectrum blocks of all radio system and the greatest common divisor of all protection frequency bandwidth, and also the frequency spectrum blocks of promptly all radio systems and all protection frequency bandwidths just are one times or several times of this minimal frequency piece; Therefore, adopt the inventive method to distribute by one times of this minimal frequency piece or several times, make each system when business demand is arranged, distribute the width of the frequency spectrum blocks that obtains all just suitable, neither can cause the width that distributes the frequency spectrum blocks obtain width greater than 7 actual needs, do not have the waste of frequency spectrum resource, further improved the utilance of frequency spectrum.Because this minimal frequency piece is a greatest common divisor, make the inventive method under the prerequisite that guarantees the availability of frequency spectrum simultaneously, the minimal frequency number of blocks of being managed is minimum, has reduced the complexity of management.
Above-mentioned search distributes k main system RAN
kThe privately owned frequency spectrum of main system of (k ∈ [1, K]) should be by the frequency spectrum blocks B of himself
MkBe unit, and not according to minimal frequency piece B
mManage the corresponding B that presses of main system local data base
MkFor unit manages; In like manner, the privately owned frequency spectrum of first-selected lease system of its correspondence of search distribution should be by the frequency spectrum blocks B of first-selected lease system self
MpkFor unit carries out, also non-minimal frequency piece B
m, its local data base is pressed B
MpkFor unit manages; For shared spectrum pool, then by minimal frequency piece B
mSearch for and distribute the corresponding B that also presses in public shared frequency spectrum data storehouse
mFor unit manages.
Privately owned frequency spectrum of main system and main system local data base are that unit manages by the frequency spectrum blocks of himself, and the privately owned frequency spectrum of first-selected lease system of its correspondence of search distribution should be by the frequency spectrum blocks B of first-selected lease system self
MpkFor unit manages, reduced the difficulty and the complexity of management like this.
In the above-mentioned multi-radio system dynamic frequency spectrum deployment method, adjust main system virtual boundary V based on the dynamic virtual spectral boundaries
DkRent border V with first-selection
PkCarry out according to a fixed step size, to different radio systems, this step-length may be different, and to same radio system, this step-length also is variable.
According to the width of the mandate frequency spectrum of different radio systems and the variation characteristics of traffic carrying capacity thereof, adopt different step-lengths to adjust main system virtual boundary V
DkRent border V with first-selection
PkStep-length is big more, main system virtual boundary V
DkAnd first-selection is rented border V
PkAdjustment effective more, convergence rate is fast more, but the availability of frequency spectrum is low more, is applicable to that mainly the system that frequency spectrum length is long, traffic carrying capacity changes greatly uses; Step-length is more little, and the availability of frequency spectrum is high more, but convergence rate is slow more, is applicable to that traffic carrying capacity changes system less or that frequency spectrum length is short.Same system changes the less period in traffic carrying capacity, adopts smaller step size, and traffic carrying capacity changes the period greatly, then adopts bigger step-length.
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 distributes the schematic diagram of (FSA) scheme for fixed frequency spectrum.
Fig. 2 is the schematic diagram of adjacent DSA scheme.
Fig. 3 is the schematic diagram of burst DSA scheme.
Fig. 4 is the dynamic frequency spectrum deployment schematic diagram of the main system RAN1 more than needed of the embodiment of the invention.
Fig. 5 for all systems of adopting the embodiment of the invention in sometime frequency spectrum view.
Fig. 6 is for the present invention and fixed frequency spectrum is distributed, the emulation of the availability of frequency spectrum of adjacent/burst DSA
Comparison diagram as a result.
Fig. 7 is the schematic diagram of the physical equipment of the enforcement embodiment of the invention.Embodiment
Embodiment
Fig. 4, Fig. 5 illustrate, and a kind of embodiment of the present invention is, a kind of multi-radio system dynamic frequency spectrum deployment method based on the dynamic virtual spectral boundaries, and this method is made up of following steps:
(1) determines the minimal frequency piece B of a plurality of radio systems
m, each radio system RAN
k, the mandate frequency spectrum of k ∈ [1, K] is [f
Ak, f
Bk], f wherein
AkFor authorizing the lower limit spectrum value of frequency spectrum, f
BkFor authorizing the upper limit spectrum value of frequency spectrum, will authorize frequency spectrum by minimal frequency piece B
mBe divided into N
k=B
k/ B
mIndividual unit, wherein B
k=f
Bk-f
AkFor authorizing the width of frequency spectrum; Each radio system RAN
kSet main system virtual boundary V according to historical record and current business amount
Dk, this border V
DkWith the lower limit spectrum value f of system
AkInterior frequency spectrum blocks is the privately owned frequency spectrum of main system, border V
DkWith the upper limit spectrum value f of system
BkInterior frequency spectrum blocks is for sharing spectrum pool.
Minimal frequency piece B wherein
mDetermine carry out as follows:
Definition protection frequency bandwidth: adopt burst DSA method to carry out dynamic frequency spectrum deployment owing to share spectrum pool; for fear of interference; all stipulate the protection frequency band of certain width between the frequency spectrum blocks of any two different systems, these protection frequency bands put together, be constructed as follows matrix:
Wherein, B
Gij=B
Gji﹠amp; B
Gii=0
Wherein, B
GijProtection frequency bandwidth between i of expression system and the j of system.
Determine each radio system RAN
k, the size of k ∈ [1, K] frequency spectrum blocks is designated as B respectively
M1, B
M2... B
MK, as GSM, iDEN, the frequency spectrum blocks size of IS-95 and DVB-T is respectively 200KHz, 25KHz, 1250KHz and 6-8MHz; And from protection spectral matrix BG
(KxK)In obtain protection frequency bandwidth B between any two RAN
Gij, wherein i ≠ j and i, j ∈ [1, K]; Get B
M1, B
M2... B
MKAnd B
GijGreatest common divisor, be designated as B
m=gcd (B
M1, B
M2... B
MK, B
Gij), as the least unit of each RAN spectrum division, like this, the spectrum requirement of each RAN and protection band bandwidth are B
mIntegral multiple.
(2) obtain each radio system RAN
kThe minimal frequency piece of current privately owned frequency spectrum is counted N
BkAccount for total minimal frequency piece and count N
kRatio be privately owned spectrum occupancy η
k=N
Bk/ N
k, all current η
k＜1 radio system is main system, wherein η
k≤ default threshold T H
kMain system then be main system more than needed; All current η
k=1 radio system and nothing authorize the system of frequency spectrum to be lease system, rent the idle frequency spectrum piece of main system when lease system has spectrum requirement and himself not to satisfy.
(3) main system more than needed selects the lease system of a current spectrum requirement amount maximum to be defined as its first-selected lease system from existing lease system; Border V is rented for selected first-selected lease system is provided with a first-selection in selected back in its shared spectrum pool
PkWherein first-selection is rented border V
PkWith the upper limit spectrum value f of system
BkInterior frequency spectrum blocks is the privately owned frequency spectrum of first-selected lease system, comprises N
PkIndividual minimal frequency piece B
mFirst-selection is rented border V
PkWith main system virtual boundary V
DkBetween frequency spectrum blocks for sharing spectrum pool; When this first-selection lease system need be rented frequency spectrum blocks, preferentially rent the interior frequency spectrum blocks of the privately owned frequency spectrum of first-selected lease system of corresponding main system more than needed.
In this routine method:
(1) radio system RAN
kWith its state and the whole dynamically recordings of intrasystem frequency spectrum blocks operating position thereof in public shared frequency spectrum data storehouse; The state of radio system comprises that system type belongs to the corresponding relation of any and main system more than needed and first-selected lease system in main system, main system more than needed, lease system, the first-selected lease system; Frequency spectrum blocks operating position: comprise that all piece frequency spectrum blocks that main system virtual boundary, first-selection are rented in border and the shared spectrum pool thereof take situation between the two.
Main system is with its virtual boundary V
DkAnd the operating position dynamically recording of privately owned frequency spectrum blocks is in the main system local data base, and main system wherein more than needed also will write down first-selection and rent border V in these data
Pk
First-selected lease system is the operating position of the mandate frequency spectrum blocks of himself, with and the first-selection of the main system more than needed of renting rent border V
PkAnd the operating position of the privately owned frequency spectrum blocks of lease system at first, record in the local data base of first-selected lease system.
Other lease system only needs the operating position of the mandate frequency spectrum blocks of himself is recorded in its local data base, if but this lease system self does not have system's (use fully other people frequency spectrum) of any mandate private frequency spectrum, then need not set up this database.
When (2) main system that comprises main system more than needed has spectrum requirement, at first visit the main system local data base, the idle frequency spectrum piece in the privately owned frequency spectrum blocks of search main system has and then distributes it; Otherwise, visit public shared frequency spectrum data storehouse, the idle frequency spectrum piece in the shared spectrum pool of search and distribution native system; Still do not have the idle frequency spectrum piece if native system is shared in the spectrum pool, then search for and distribute other main system to share idle frequency spectrum piece in the spectrum pool; If still do not have the idle frequency spectrum piece, then interrupt by force and distribute this main system to share in the spectrum pool, near main system virtual boundary V
Dk, the frequency spectrum blocks that other lease system is just using.
As seen, even main system has spectrum requirement, but the frequency spectrum blocks of having distributed to lease system can not switch at once to main system and use, unless entire spectrum has not had the idle frequency spectrum piece available.Therefore, the present invention can reduce the interruption rate that is forced to of lease system under the prerequisite that does not influence the main system performance, thereby provides good quality of service (QoS) for lease system.
When first-selected lease system has spectrum requirement, at first visit its local data base, the local idle frequency spectrum piece of authorizing frequency spectrum of search has and then distributes it; Otherwise the privately owned frequency spectrum blocks of first-selected lease system of the corresponding main system more than needed of search, if there is the idle frequency spectrum piece then to distribute it, if there is not the idle frequency spectrum piece then to visit public shared frequency spectrum data storehouse, search also distributes the idle frequency spectrum piece of sharing in the spectrum pool.
When other lease system has spectrum requirement, at first visit its local data base, the local idle frequency spectrum piece of authorizing frequency spectrum of search has and then distributes it; Otherwise, in the shared spectrum pool in public shared frequency spectrum data storehouse, search for and obtain the idle frequency spectrum piece.
(3) all systems are after distributing frequency spectrum blocks, all in local data base or public shared frequency spectrum data storehouse with distribution frequency spectrum blocks state be rewritten as and take; Business is finished no longer need use frequency spectrum, discharge frequency spectrum blocks after, all local data base and corresponding frequency spectrum piece must be rewritten as the free time, so as other system from local data base and obtain the idle frequency spectrum block message of current frequency spectrum at any time.
In this routine dynamic frequency spectrum deployment method:
Main system is always authorized the lower limit spectrum value f of frequency spectrum from it
AkBegin upwards to use the idle frequency spectrum piece, up to arriving main system virtual boundary V
DkTill; After the spectrum requirement of first-selected lease system surpasses the mandate frequency spectrum of self, from its corresponding main system upper limit spectrum value f more than needed
BkThe idle frequency spectrum piece is got in beginning downwards, rents border V up to arriving first-selection
PkTill; When the idle frequency spectrum use is searched for by all systems in sharing spectrum pool; undertaken by existing burst DSA mode; for fear of interference, must between the frequency spectrum blocks of adjacent system, increase the protection frequency band, the protection band bandwidth between any two systems can be from predefined protection frequency band matrix B G
(KxK)In obtain.Share spectrum pool according to the dynamic change of system business amount, the frequency spectrum blocks busy-idle condition can obtain by inquiry in the current frequency spectrum pond; Visiting these frequency spectrum blocks will realize based on reconfigurable system.
In this routine method:
(1) after main system is distributed at every turn or discharged frequency spectrum blocks, dynamically adjusts main system virtual boundary V
Dk:
When the traffic carrying capacity increase of main system causes main system virtual boundary V
DkThe idle minimal frequency piece of interior privately owned frequency spectrum is counted N
FkDuring minimizing, if should free time minimal frequency number of blocks N
FkThe total minimal frequency piece of frequency spectrum privately owned with it is counted N
BkRatio be N
Fk/ N
Bk≤ default threshold ones TH
Bk1, then increase main system virtual boundary V
DkAnd upgrade data in its local data base, make the privately owned amount of frequency spectrum of main system increase.Concrete computational methods are as follows:
V
Dk=V
Dk+ n
k* B
Mk, n
kBe step-length
If upgrade main system virtual boundary V
DkAfter, current privately owned frequency spectrum minimal frequency piece is counted N
BkMake privately owned spectrum occupancy η
k=N
Bk/ N
k＞TH
k, then this main system no longer is a main system more than needed, if exist first-selected lease system this moment, then discharges it, simultaneously, upgrades the system state data of sharing in the frequency spectrum data storehouse.
When reducing, the traffic carrying capacity of main system causes main system virtual boundary V
DkThe idle minimal frequency piece of interior privately owned frequency spectrum is counted N
FkDuring increase, if should free time minimal frequency number of blocks N
FkThe total minimal frequency piece of frequency spectrum privately owned with it is counted N
BkRatio be N
Fk/ N
Bk〉=default limit value the TH of wealthy family
Bk2, then reduce main system virtual boundary V
DkAnd upgrade data in its local data base, make the privately owned amount of frequency spectrum of main system reduce.Concrete computational methods are as follows:
V
Dk=V
Dk-n
k* B
Mk, n
kBe step-length
If upgrade main system virtual boundary V
DkAfter, main system virtual boundary V
DkThe interior total minimal frequency piece of privately owned frequency spectrum is counted N
BkMake privately owned spectrum occupancy η
k=N
BK/ N
K≤ TH
k, then this main system becomes main system more than needed, should select one as its first-selected lease system from have the lease system that does not become first-selected lease system now, upgrades the system state data of sharing in the frequency spectrum data storehouse simultaneously.
If the traffic carrying capacity of main system increases or minimizing, but do not make the quantity N of the idle minimum spectrum piece of its privately owned frequency spectrum
FKSatisfy N
Fk/ N
Bk≤ TH
Bk1Perhaps N
Fk/ N
Bk〉=TH
Bk2, then keep main system virtual boundary V
DkConstant.
(2) after each distribution of first-selected lease system or the release frequency spectrum blocks, dynamically adjust first-selection and rent border V
Pk:
When the traffic carrying capacity increase of first-selected lease system causes first-selection to rent border V
PkThe idle minimal frequency piece of interior privately owned frequency spectrum is counted N
PFkDuring minimizing, if should free time minimal frequency number of blocks N
PfkThe minimal frequency number of blocks N total with the privately owned frequency spectrum of first-selected lease system
PkRatio be N
PFk/ N
Pk≤ default first-selected threshold ones the TH of system
Pk1, then increase first-selection and rent border V
Pk, concrete computational methods are as follows:
V
Pk=V
Pk+ n
k* B
Mpk, n
kBe step-length
And upgrade data in its local data base, make the privately owned amount of frequency spectrum of first-selected lease system increase.
When reducing, the traffic carrying capacity of first-selected lease system cause first-selection to rent border V
PkThe idle minimal frequency piece of interior privately owned frequency spectrum is counted N
PFkDuring increase, if should free time minimal frequency number of blocks N
PFkThe minimal frequency number of blocks N total with the privately owned frequency spectrum of first-selected lease system
PkRatio be N
PFk/ N
Pk〉=default limit value the TH of wealthy family of first-selected system
Pk2, then reduce first-selection and rent border V
PkConcrete computational methods are as follows:
V
Pk=V
Pk-n
k* B
Mpk, n
kBe step-length
Count N if reduce to the total minimal frequency piece of the privately owned frequency spectrum of first-selected lease system
PkCount N with total minimal frequency piece of corresponding main system
KRatio be N
PK/ N
K≤ default first-selected system door limit value TH
Pk, then discharging this first-selected lease system, corresponding main system is reselected new first-selected lease system according to the traffic carrying capacity of existing lease system, upgrades the data in its local data base simultaneously.
If the traffic carrying capacity of first-selected lease system increases or reduces, but does not make its first-selection rent the quantity N of the idle minimal frequency piece of the privately owned frequency spectrum in the border
PFkSatisfy N
PFk/ N
Pk≤ TH
Pk1Perhaps N
PFk/ N
Pk〉=TH
Pk2, then keep first-selection to rent border V
PkConstant.
In order to guarantee the fairness of all lease systems, the present invention rents border V in the dynamic first-selection of adjusting
PkThe time, except can being undertaken, also can rent border V in the increase first-selection by above method
PkThe time, after satisfying the threshold value condition, also detect the blocking rate of other all lease systems, when all blocking rates all when low, could increase first-selection and rent border V
Pk, so that the blocking rate basically identical of the blocking rate of first-selected lease system and other lease system.
Because main system virtual boundary V
DKRent border V with first-selection
PKIncrease, make the frequency spectrum blocks border change, therefore, what may cause lease system is forced to interrupt (Forced Termination).Being forced to interruption and can causing QoS not guarantee, is highstrung problem in the real-time communication system.Not only previous DSA scheme can cause is forced to interrupt, and when the present invention carries out the adjustment of main system virtual boundary, also face this problem, but the present invention can eliminate in the following manner or reduce and be forced to interruption rate:
By based on threshold T H
Bk1And TH
Pk1Main system virtual boundary V
DKRent border V with first-selection
PKIncrease, used, then this customer service is switched to other idle frequency spectrum piece earlier, regain this frequency spectrum blocks again by other radio system users if share the interior corresponding frequency spectrum blocks that is put under privately owned frequency spectrum of spectrum pool.
To share as far as possible in the spectrum pool near main system virtual boundary V
DKRent border V with first-selection
PKFrequency spectrum blocks distribute to non-real-time service (as the data business).
In the example method: search distributes k main system RAN
kThe privately owned frequency spectrum of main system of (k ∈ [1, K]) should be by the frequency spectrum blocks B of himself
MkFor unit carries out, but not minimal frequency piece B
m, therefore, the main system local data base is pressed B
MkFor unit manages; In like manner, the privately owned frequency spectrum of first-selected lease system of its correspondence of search distribution should be by the frequency spectrum blocks B of first-selected lease system self
MpkFor unit carries out, also non-minimal frequency piece B
m, its local data base is pressed B
MpkFor unit manages; For shared spectrum pool, then by minimal frequency piece B
mSearch for and distribute the corresponding B that also presses in public shared frequency spectrum data storehouse
mFor unit manages.
B is pressed in public shared frequency spectrum data storehouse
mThe concrete grammar that manages for unit is: when lease system has spectrum requirement, when perhaps the spectrum requirement of main system and first-selected lease system surpasses separately privately owned frequency spectrum, all must scan the idle frequency spectrum piece in the intermediate frequency spectrum pond independently of one another as required, to obtain the right to use of idle frequency spectrum piece, take back being labeled as of frequency spectrum blocks of rewriting and take; After system business is finished, the frequency spectrum blocks of release busy then, and middle corresponding frequency spectrum piece is labeled as the free time, use for other system again; By such dynamically updating, guarantee that current intermediate frequency spectrum block message all is up-to-date, any system at any time can therefrom obtain current main system virtual boundary V
DkFirst-selection is rented border V
PKUp-to-date information with idle frequency spectrum piece in the spectrum pool; Though increased some extra expenses like this, during frequency spectrum blocks in needs use spectrum pool of main system, lease system and first-selected lease system, only need visit, just can obtain current idle frequency spectrum block message.
In this example, adjust main system virtual boundary V
DkRent border V with first-selection
PkCarry out according to a fixed step size, to different radio systems, this step-length may be different, and to same radio system, this step-length is variable.K the RAN of system
kStep-length n
kExpression, i.e. main system virtual boundary V
DKRent border V with first-selection
PKWhen the boundary adjusts, once increase or reduce n
kIndividual frequency spectrum unit; Concerning main system, the frequency spectrum blocks B of the minimum of himself gets in frequency spectrum unit
Mk, i.e. main system virtual boundary N
BkAdjustment with B
MkFor unit carries out, concrete quantity depends on n
kSize; Concerning first-selected lease system, the frequency spectrum blocks B of the minimum of first-selected lease system self gets in frequency spectrum unit
Mpk, in like manner first-selection is rented border N
PkAdjustment with B
MpkFor unit carries out, concrete quantity depends on n equally
kSize.
In order to bring into play advantage of the present invention to greatest extent, the step-length n of different radio systems
kMay be different, to same radio system, step-length n
kDynamic change, depend primarily on the spectrum requirement of respective wireless electric system (the first-selected lease system of main system or its correspondence), step-length is big more, dynamic virtual spectral boundaries (V
DKAnd V
PK) adjustment effective more (convergence rate height) but the availability of frequency spectrum is low more, the more little availability of frequency spectrum of step-length is high more but convergence rate is slow more.
Because method of the present invention is the current traffic carrying capacity of sharing according to each of radio system, determines main system and first-selected lease system, dynamically adjusts virtual spectral boundaries V
DkTo reduce employed protection frequency band as much as possible.Therefore, the present invention also can be described as adaptive boundary DSA (dynamic frequency spectrum deployment) scheme.
In Fig. 4 and Fig. 6, also method of the present invention is designated as adaptive boundary DSA.
Fig. 4 is the dynamic frequency spectrum deployment schematic diagram of the main system RAN1 more than needed of present embodiment.For simplicity, the idle frequency spectrum piece that has only first-selected lease system RAN2 and other lease system RAN3 lease system RAN1.As can be seen from the figure main system virtual boundary V
D1In difference is dynamic change constantly, and first-selection is rented border V
P1In difference also is dynamic change constantly; Main system virtual boundary V
D1Following frequency spectrum blocks all is the privately owned frequency spectrum blocks of main system RAN1, all used by main system RAN1, and first-selection is rented border V
P1Above frequency spectrum blocks is the privately owned frequency spectrum blocks of first-selected lease system RAN2, all uses by first-selected lease system RAN2, and V
D1With V
P1Between shared spectrum pool then use at random by the RAN1 of system, RAN2, RAN3.Can find out obviously also that from Fig. 4 the protection frequency band only occurs in sharing spectrum pool, than the burst DSA scheme of Fig. 3, the quantity of its protection frequency band obviously reduces.
Fig. 5 for all systems of adopting present embodiment in sometime frequency spectrum view.System RAN1 conduct this moment main system more than needed among the figure, it selects RAN2 as its first-selected lease system, and this first-selection lease system RAN2 is not for there being the radio system of mandate frequency spectrum; System RAN3 is general main system at this moment, and the shared spectrum pool on its top can be rented for all lease systems; System RAN K has the general lease system of authorizing frequency spectrum, can rent the idle frequency spectrum piece that all lease systems are shared spectrum pool; For simplicity, the frequency spectrum state of other radio system from RAN4 to RAN K-1 does not omit and draws.
Simulation result
In order to compare the availability of frequency spectrum of fixed frequency spectrum distribution, adjacent DSA, burst DSA and four kinds of schemes of adaptive boundary DSA of the present invention, carry out Computer Simulation in following condition: three radio systems are shared frequency spectrums, the minimal frequency piece B of each system
mQuantity N
kBeing respectively 15,12,12, three systems, the demand of frequency spectrum blocks is obeyed parameter respectively is λ
1, λ
2, λ
3Poisson distribution, it is 1/ μ that residence time is obeyed parameter
1, 1/ μ
2, 1/ μ
3Exponential distribution.Get λ
1=0.2, λ
2=0.05, λ
3=0.03; 1/ μ
1=180 seconds, 1/ μ
2=180 seconds, 1/ μ
3=100 seconds; 9 and 3 Ireland (Erlang) are got in the spectrum requirement load of system RAN1, RAN2 respectively, and 36 Ireland are got in the spectrum requirement load of system RAN3; Update time, τ was made as 1800 seconds.For the present invention program, RAN1, RAN2 are main system in three systems, and RAN3 is first-selected lease system.
Calling based on above setting reaches rate, residence time and available resources, obtains by emulation: the availability of frequency spectrum comparative result of the present invention and fixed frequency spectrum distribution, adjacent DSA and burst DSA as shown in Figure 6.As shown in Figure 6, under multi-radio system frequency spectrum share environment, under identical spectrum requirement arrival rate (calling reaches rate and residence time product), the present invention can obtain the higher availability of frequency spectrum than fixed frequency spectrum distribution, adjacent DSA and burst DSA, and the spectrum requirement arrival rate is high more, and the effect that the present invention improves the availability of frequency spectrum is obvious more.
The physical equipment of realizing
The present invention can be used for different Wireless Telecom Equipments, as cellular communication apparatus, wireless monitoring equipment, DVB-T relay devices, WLAN devices or the like.
The terminal equipment of method of the present invention its physics realization when implementing can adopt the reconfigurable equipment (promptly adopt software radio, realize the terminal equipment of dynamic assignment frequency spectrum) of Fig. 7 to realize.The most basic parts of reconfigurable equipment comprise: radio frequency unit, intermediate frequency unit, Base Band Unit and signal processing unit; Intermediate frequency unit wherein mainly by digital-to-analogue/analog to digital converter, digital signal up/down-converter forms.The all unit of whole reconfigurable equipment all are programmable.
Radio frequency unit adopts the analog radio frequency circuit, is responsible for carrying out on operated frequency range the transmitting-receiving of signal.
Intermediate frequency unit is responsible for digital-to-analogue and analog-to-digital conversion, comprises adopting traditional wireless device that digital signal is handled.The recipient, signal enters the digital signal down-converter by analog to digital converter, and same, at transmit leg, signal is come from Base Band Unit, after the digital signal up-converter, carries out digital-to-analogue conversion at digital to analog converter.Digital signal is up/and down-converter all needs to adopt Digital Signal Processing to handle, with the requirement of satisfying the complete able to programme of reconfigurable wireless device and reshuffling.
The last stage of reconfigurable equipment is a Base Band Unit, and here, digital signal is by handling to adapt to corresponding protocol.Complicated along with agreement requires the corresponding signal process ability also will improve thereupon.
Reconfigurable equipment also comprises signal processing unit, is responsible for Digital Signal Processing or for above unit provides other processing, it can be mutually integrated or relatively independent with above unit.
Except the function of above unit, reconfigurable equipment also can increase functional units such as source encoding/decoding, channel coding/decoding, multiple access processing, spread spectrum/despreading, encrypt/decrypt as required, realizes function corresponding.
In addition, the privately owned frequency spectrum of general main system of the present invention is by its main system virtual boundary V
DkWith the lower limit spectrum value f of system
AkInterior frequency spectrum blocks is formed, and the privately owned frequency spectrum of first-selected lease system is rented border V by first-selection
PkWith the upper limit spectrum value f of system
BkInterior frequency spectrum blocks is formed, and this is the usual practice of multi-radio system dynamic frequency spectrum deployment, also is convenient to simple and clear explanation method of the present invention.Certainly, when implementing, reality also can realize that promptly the privately owned frequency spectrum of main system is by its main system virtual boundary V by the opposite way that is equal to
DkWith the upper limit spectrum value f of system
BkInterior frequency spectrum blocks is formed, and the privately owned frequency spectrum of first-selected lease system is rented border V by first-selection
PkWith the lower limit spectrum value f of system
AkInterior frequency spectrum blocks is formed.
Claims (7)
1, a kind of multi-radio system dynamic frequency spectrum deployment method based on the dynamic virtual spectral boundaries, this method is made up of following steps:
(1) determines the minimal frequency piece B of a plurality of radio systems
m, each radio system RAN
k, the mandate frequency spectrum of k ∈ [1, K] is [f
Ak, f
Bk], f wherein
AkFor authorizing the lower limit spectrum value of frequency spectrum, f
BkFor authorizing the upper limit spectrum value of frequency spectrum, will authorize frequency spectrum by minimal frequency piece B
mBe divided into N
k=B
k/ B
mIndividual unit, wherein B
k=f
Bk-f
AkFor authorizing the width of frequency spectrum; Each radio system RAN
kSet main system virtual boundary V according to historical record and current business amount
Dk, this border V
DkWith the lower limit spectrum value f of system
AkInterior frequency spectrum blocks is the privately owned frequency spectrum of main system, border V
DkWith the upper limit spectrum value f of system
BkInterior frequency spectrum blocks is for sharing spectrum pool;
(2) obtain each radio system RAN
kThe minimal frequency piece of current privately owned frequency spectrum is counted N
BkAccount for total minimal frequency piece and count N
kRatio be privately owned spectrum occupancy η
k=N
Bk/ N
k, all current η
k＜1 radio system is main system, wherein η
k≤ default threshold T H
kMain system then be main system more than needed; All current η
k=1 radio system and nothing authorize the system of frequency spectrum to be lease system, rent the idle frequency spectrum piece of main system when lease system has spectrum requirement and himself not to satisfy;
(3) main system more than needed selects the lease system of a current spectrum requirement amount maximum to be defined as its first-selected lease system from existing lease system; Border V is rented for selected first-selected lease system is provided with a first-selection in selected back in its shared spectrum pool
Pk, wherein first-selection is rented border V
PkWith the upper limit spectrum value f of system
BkInterior frequency spectrum blocks is the privately owned frequency spectrum of first-selected lease system, comprises N
PkIndividual minimal frequency piece B
mFirst-selection is rented border V
PkWith main system virtual boundary V
DkBetween frequency spectrum blocks for sharing spectrum pool; When this first-selection lease system need be rented frequency spectrum blocks, preferentially rent the interior frequency spectrum blocks of the privately owned frequency spectrum of first-selected lease system of corresponding main system more than needed.
2, a kind of multi-radio system dynamic frequency spectrum deployment method based on the dynamic virtual spectral boundaries as claimed in claim 1 is characterized in that:
(1) described radio system RAN
kWith its state and the whole dynamically recordings of intrasystem frequency spectrum blocks operating position thereof in public shared frequency spectrum data storehouse; The state of radio system comprises that system type belongs to the corresponding relation of any and main system more than needed and first-selected lease system in main system, main system more than needed, lease system, the first-selected lease system; The frequency spectrum blocks operating position comprises: all piece frequency spectrum blocks that main system virtual boundary, first-selection are rented in border and the shared between the two spectrum pool thereof take situation;
Main system is with its virtual boundary V
DkAnd the operating position dynamically recording of privately owned frequency spectrum blocks is in its local data base, and main system wherein more than needed also will write down first-selection and rent border V in this table
Pk
First-selected lease system is the operating position of the mandate frequency spectrum blocks of himself, with and the first-selection of the main system more than needed of renting rent border V
PkAnd the operating position of the privately owned frequency spectrum blocks of lease system at first, record in the local data base of first-selected lease system;
Other lease system only needs the operating position of the mandate frequency spectrum blocks of himself is recorded in its local data base, if but this lease system self does not have system's (use fully other people frequency spectrum) of any mandate private frequency spectrum, then need not set up this database;
When (2) main system that comprises main system more than needed has spectrum requirement, at first visit the main system local data base, the idle frequency spectrum piece in the privately owned frequency spectrum blocks of search main system has and then distributes it; Otherwise, visit public shared frequency spectrum data storehouse, the idle frequency spectrum piece in the shared spectrum pool of search and distribution native system; Still do not have the idle frequency spectrum piece if native system is shared in the spectrum pool, then search for and distribute other main system to share idle frequency spectrum piece in the spectrum pool; If still do not have the idle frequency spectrum piece, then interrupt by force and distribute this main system to share in the spectrum pool, near main system virtual boundary V
Dk, the frequency spectrum blocks that other lease system is just using;
When first-selected lease system had spectrum requirement, at first access local database was searched for local idle frequency spectrum piece of authorizing frequency spectrum, has and then distributes it; Otherwise the privately owned frequency spectrum blocks of first-selected lease system of the corresponding main system more than needed of search, if there is the idle frequency spectrum piece then to distribute it, if there is not the idle frequency spectrum piece then to visit public shared frequency spectrum data storehouse, search also distributes the idle frequency spectrum piece of sharing in the spectrum pool;
When other lease system has spectrum requirement, at first visit its local data base, the local idle frequency spectrum piece of authorizing frequency spectrum of search has and then distributes it; Otherwise, in the shared spectrum pool in public shared frequency spectrum data storehouse, search for and obtain the idle frequency spectrum piece;
(3) all systems are after distributing frequency spectrum blocks, all in local data base or public shared frequency spectrum data storehouse with distribution frequency spectrum blocks state be rewritten as and take; Business is finished no longer need use frequency spectrum, discharge frequency spectrum blocks after, all local data base and corresponding frequency spectrum piece must be rewritten as the free time, so as other system from local data base and obtain the idle frequency spectrum block message of current frequency spectrum at any time.
3, a kind of multi-radio system dynamic frequency spectrum deployment method based on the dynamic virtual spectral boundaries as claimed in claim 2 is characterized in that: described main system is always authorized the lower limit spectrum value f of frequency spectrum from it
AkBegin upwards to use the idle frequency spectrum piece, up to arriving main system virtual boundary V
DkTill; After the spectrum requirement of first-selected lease system surpasses the mandate frequency spectrum of self, from its corresponding main system upper limit spectrum value f more than needed
BkThe idle frequency spectrum piece is got in beginning downwards, rents border V up to arriving first-selection
PkTill; When the idle frequency spectrum use is searched for by all systems in sharing spectrum pool; undertaken by burst dynamic frequency spectrum deployment mode; for fear of interference; must increase the protection frequency band between the frequency spectrum blocks of adjacent system, the protection band bandwidth between any two systems can be from predefined protection frequency band matrix B G
(KxK)In obtain.
4, as claim 2 or 3 described a kind of multi-radio system dynamic frequency spectrum deployment methods, it is characterized in that based on the dynamic virtual spectral boundaries:
(1) after each distribution of described main system or the release frequency spectrum blocks, dynamically adjusts main system virtual boundary V
Dk:
When the traffic carrying capacity increase of main system causes main system virtual boundary V
DkThe idle minimal frequency piece of interior privately owned frequency spectrum is counted N
FkDuring minimizing, if should free time minimal frequency number of blocks N
FkThe total minimal frequency piece of frequency spectrum privately owned with it is counted N
BkRatio be N
Fk/ N
Bk≤ default threshold ones TH
Bk1, then increase main system virtual boundary V
DkAnd upgrade data in its local data base, make the privately owned amount of frequency spectrum of main system increase; If current privately owned frequency spectrum minimal frequency piece is counted N
BkMake privately owned spectrum occupancy η
k=N
Bk/ N
k＞TH
k, then this main system no longer is a main system more than needed, if exist first-selected lease system this moment, then discharges it, simultaneously, upgrades the system state data of sharing in the frequency spectrum data storehouse;
When reducing, the traffic carrying capacity of main system causes main system virtual boundary V
DkThe idle minimal frequency piece of interior privately owned frequency spectrum is counted N
FkDuring increase, if should free time minimal frequency number of blocks N
FkThe total minimal frequency piece of frequency spectrum privately owned with it is counted N
BkRatio be N
Fk/ N
Bk〉=default limit value the TH of wealthy family
Bk2, then reduce main system virtual boundary V
DkAnd upgrade data in its local data base, make the privately owned amount of frequency spectrum of main system reduce; If main system virtual boundary V
DkThe interior total minimal frequency piece of privately owned frequency spectrum is counted N
BkMake privately owned spectrum occupancy η
k=N
BK/ N
K≤ TH
k, then this main system becomes main system more than needed, should select one as its first-selected lease system from have the lease system that does not become first-selected lease system now, upgrades the system state data of sharing in the frequency spectrum data storehouse simultaneously;
If the traffic carrying capacity of main system increases or minimizing, but do not make the quantity N of the idle minimum spectrum piece of its privately owned frequency spectrum
FKSatisfy N
Fk/ N
Bk≤ TH
Bk1Perhaps N
Fk/ N
Bk〉=TH
Bk2, then keep main system virtual boundary V
DkConstant;
(2) after each distribution of described first-selected lease system or the release frequency spectrum blocks, dynamically adjust first-selection and rent border V
Pk:
When the traffic carrying capacity increase of first-selected lease system causes first-selection to rent border V
PkThe idle minimal frequency piece of interior privately owned frequency spectrum is counted N
PFkDuring minimizing, if should free time minimal frequency number of blocks N
PFkThe minimal frequency number of blocks N total with the privately owned frequency spectrum of first-selected lease system
PkRatio be N
PFk/ N
Pk≤ default first-selected threshold ones the TH of system
Pk1, then increase first-selection and rent border V
Pk, and upgrade data in its local data base, make the privately owned amount of frequency spectrum of first-selected lease system increase;
When reducing, the traffic carrying capacity of first-selected lease system cause first-selection to rent border V
PkThe idle minimal frequency piece of interior privately owned frequency spectrum is counted N
PFkDuring increase, if should free time minimal frequency number of blocks N
PFkThe minimal frequency number of blocks N total with the privately owned frequency spectrum of first-selected lease system
PkRatio be N
PFk/ N
Pk〉=default limit value the TH of wealthy family of first-selected system
Pk2, then reduce first-selection and rent border V
Pk, count N if reduce to the total minimal frequency piece of the privately owned frequency spectrum of first-selected lease system
PkThe ratio of counting NK with total minimal frequency piece of corresponding main system is N
PK/ N
K≤ default first-selected system door limit value TH
Pk, then discharging this first-selected lease system, corresponding main system is reselected new first-selected lease system according to the traffic carrying capacity of existing lease system, upgrades the data in its local data base simultaneously;
If the traffic carrying capacity of first-selected lease system increases or reduces, but does not make its first-selection rent the quantity N of the idle minimal frequency piece of the privately owned frequency spectrum in the border
PFkSatisfy N
PFk/ N
Pk≤ TH
Pk1Perhaps N
PFk/ N
Pk〉=TH
Pk2, then keep first-selection to rent border V
PkConstant.
5, a kind of multi-radio system dynamic frequency spectrum deployment method based on the dynamic virtual spectral boundaries as claimed in claim 1 is characterized in that: described multi-radio system minimal frequency piece B
mDefinite method be: at first according to each radio system (RAN) frequency spectrum blocks B
M1, B
M2... B
MKWidth and from protection frequency band matrix B G
(KxK)In protection frequency bandwidth B between any two RAN of obtaining
Gij, wherein i ≠ j and i, j ∈ [1, K] gets B
M1, B
M2... B
MKAnd B
GijGreatest common divisor, as the minimal frequency piece B of multi-radio system spectrum division
m=gcd (B
M1, B
M2... B
MK, B
Gij).
6, as claim 2 or 5 described a kind of multi-radio system dynamic frequency spectrum deployment methods based on the dynamic virtual spectral boundaries, it is characterized in that: described search distributes k main system RAN
kThe privately owned frequency spectrum of main system of (k ∈ [1, K]) should be by the frequency spectrum blocks B of himself
MkFor unit carries out, but not minimal frequency piece B
m, therefore, the main system local data base is pressed B
MkFor unit manages; In like manner, the privately owned frequency spectrum of first-selected lease system of its correspondence of search distribution should be by the frequency spectrum blocks B of first-selected lease system self
MpkFor unit carries out, also non-minimal frequency piece B
m, its local data base is pressed B
MpkFor unit manages; For shared spectrum pool, then by minimal frequency piece B
mSearch for and distribute the corresponding B that also presses in public shared frequency spectrum data storehouse
mFor unit manages.
7, a kind of multi-radio system dynamic frequency spectrum deployment method based on the dynamic virtual spectral boundaries as claimed in claim 1 is characterized in that: adjust main system virtual boundary V
DkRent border V with first-selection
PkCarry out according to a fixed step size, to different radio systems, this step-length may be different, and to same radio system, this step-length is variable.
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