CN101277542B - Method and system for managing centralized dynamic spectrum among wireless networks - Google Patents
Method and system for managing centralized dynamic spectrum among wireless networks Download PDFInfo
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Abstract
The present invention provides a centralized dynamic spectrum management method and system between wireless networks. The spectrum resource is dynamically distributed to a RAT cell according to the spectrum requirement, network gain of the RAT cell, the position information of the base station, the expected maximum emitting power of the base station and relative parameters, and the gain acquired in the dynamic spectrum management is distributed to each RAT in a fairly and reasonable mode. The invention sufficiently utilizes the difference of different wireless system to the spectrum requirement on time and spatial dimension, thereby enhancing the spectrum efficiency and the gain of operator, the dynamic spectrum management is realized in the real communication network by introducing an interference inhibition technology to ensure interference between systems and introducing a cooperation based on market and competition rules to resolve the benefits competing relation between different networks.
Description
Technical field
The present invention relates to wireless communication technology field, adopt the centralized dynamic spectrum management method and the system of interference mitigation technology between a kind of more precisely wireless network.
Background technology
Continuing to bring out of wireless access technology constituted multiple wireless access technology (Radio AccessTechnology, RAT) Gong Cun cordless communication network general layout.Meanwhile, wireless traffic increase rapidly and high speed and broadband demand make the shortage of future broadband wireless communication systems intermediate frequency spectrum seem very serious.Traditional frequency spectrum distributing method is that (FixedSpectrum Management FSM), is about to spectrum allocation may and gives different wireless access technologys and corresponding operator the fixed frequency spectrum management method.Yet along with emerging in large numbers of new wireless access technology, nearly all frequency spectrum that is suitable for wireless communication transmissions all is assigned with away, and new wireless access technology is difficult to obtain spectrum allocation may, thereby has limited the development of new technology.In addition, the fixed frequency spectrum management has caused spectrum utilization efficiency low, and a lot of frequency ranges almost are idle at nearly all when and where, have formed a lot " frequency spectrum cavity-pocket ".Therefore, the fixed frequency spectrum distribution can't be satisfied the demand of following cordless communication network to spectrum management.
(End-to-end Reconfigurability E2R) is new ideas in the radio communication to end-to-end reshuffling, and it is software radio (Software Defined Radio, evolution technology SDR).The birth of reconfiguration technology makes terminal equipment and base station equipment can dynamically dispose its operating frequency flexibly, and allows it to be operated in any frequency range.The ability of this flexible configuration frequency makes that (Dynamic Spectrum Management, DSM) application at wireless network becomes possibility to Dynamic Spectrum Management.Along with the appearance of reconfiguration technology, Dynamic Spectrum Management can improve the effective way of the availability of frequency spectrum as a kind of effective spectrum management method, and then can utilize limited frequency spectrum resources to provide wireless traffic as much as possible to the user.
Existing dynamic spectrum management techniques great majority are to solve the frequency spectrum resource how unauthorized user effectively utilizes authorized user, by the frequency spectrum detection technology, find that frequency spectrum inserts chance, and insert use.The spectrum allocation may problem that is directed to the wireless network of mandate then seldom has relevant research.Existing achievement in research all adopts the distribution method of periodically carrying out frequency spectrum resource.Yet, in these spectrum allocation may mechanism, nearly all ignored interference problem, the frequency spectrum boundary belt perhaps simply is set solves interference, so interference problem fails to be well solved in the Dynamic Spectrum Management.In addition, the competition and cooperation relation between the network do not considered in these mechanism is not considered gain allocation problem between the network simultaneously to the influence of spectrum allocation may yet.Especially considering under the scene of multi-operator this internetwork vie each other and cooperation seems very outstanding.
Summary of the invention
In view of above problem, the present invention proposes dynamic spectrum management method centralized between a kind of wireless network and system, solved dynamic frequency spectrum deployment between the wireless network and disturbed the problem that suppresses, thus can maximize frequency spectrum service efficiency, improve operator gain, guarantee the jamming performance of wireless communication system and optimize the service quality of Network.
The invention provides dynamic spectrum management method centralized between a kind of wireless network, comprising:
The actual volume that has been taken place by the wireless access sub-district calculates the prediction traffic carrying capacity of this wireless access sub-district;
Obtain the expection gain of this wireless access sub-district according to the gain calculating of described prediction traffic carrying capacity and unit traffic carrying capacity;
Judge between each wireless access sub-district of having distributed frequency spectrum in the allocative decision whether have interference, comprising:
From the wireless access sub-district, select the sub-district right, and selective channel composition channel is right separately from described sub-district centering;
Calculate described sub-district all channels of centering to causing the carrier/interface ratio of interference each other, and compare with the carrier/interface ratio thresholding, if carrier/interface ratio be higher than the carrier/interface ratio thresholding then this channel disturb otherwise exist there not being interference;
If there is not the phase mutual interference, then obtain the expection overall gain of all wireless access sub-districts according to described described expection gain calculating of having distributed each wireless access sub-district of frequency spectrum;
From a plurality of described allocative decisions, select to obtain the allocative decision of greatest expected overall gain, and give each wireless access sub-district with spectrum allocation may, thereby obtain the spectrum allocation schemes of maximum spectrum utilance according to described allocative decision.
In addition, also comprise: give each wireless access sub-district with gain allocation according to the scheme of obtaining the greatest expected overall gain.
In addition, also comprise: the resource allocation conditions of the terminal of communicating by letter according to described spectrum information adjustment by the wireless access sub-district; And/or the terminal under the frequency spectrum resource situation of corresponding wireless access sub-district informed by the base station, so that terminal inserts according to new frequency spectrum resource.
Centralized Dynamic Spectrum Management system between a kind of wireless network, wherein:
Wireless access local resource administration module comprises:
The traffic forecast unit is used for calculating according to the actual volume that the wireless access sub-district has taken place the prediction traffic carrying capacity of this wireless access sub-district; And obtain the expection gain of this wireless access sub-district, and described expection gain is sent to the transaction unit according to the gain calculating of described prediction traffic carrying capacity and unit traffic carrying capacity;
The transaction unit is used for described expection gain is sent to frequency spectrum and gain administration module, and receives the spectrum allocation may that described frequency spectrum and gain administration module return;
Frequency spectrum comprises with the gain administration module:
The spectrum allocation may unit is used for determining allocative decision and sending it to the interference assessment unit, comprises the frequency spectrum that each wireless access sub-district has been distributed in this allocative decision; Be used to receive the described expection gain of described transaction unit transmission and send the gain allocation unit to, and the allocative decision that described gain unit is determined returns to described transaction unit;
The interference assessment unit is judged between each wireless access sub-district of having distributed frequency spectrum in the allocative decision whether have interference, and assessment result is sent to the gain allocation unit;
The gain allocation unit is when described assessment result shows when not having the phase mutual interference, according to the described expection gain calculating expection overall gain of all wireless access sub-districts that comprise in the described allocative decision; And the allocative decision of from a plurality of described allocative decisions, selecting to obtain the greatest expected overall gain, and described allocative decision sent to described spectrum allocation may unit.
In addition, described gain allocation unit is also given each wireless access sub-district according to the described scheme of obtaining the greatest expected overall gain with gain allocation.
In addition, described gain allocation unit comprises: first computing unit of the described expection gain calculating expection overall gain of all wireless access sub-districts that are used for comprising according to described allocative decision; The allocative decision that is used for obtaining the greatest expected overall gain is defined as first selected cell of optimum distributing scheme.
In addition, described interference assessment unit comprises: be used for selecting the sub-district right from the wireless access sub-district, and from described sub-district centering separately selective channel form the second right selected cell of channel; Calculate second computing unit of described sub-district all channels of centering to the carrier/interface ratio that causes interference each other; And the judging unit of judging carrier/interface ratio and carrier/interface ratio thresholding height, if carrier/interface ratio be higher than the carrier/interface ratio thresholding then this channel otherwise have interference to there not being interference.
In addition, described wireless access local resource administration module also comprises: the resource re-allocation unit, be used to receive the frequency spectrum resource information that described transaction unit sends, and the resource allocation conditions of the terminal of communicating by letter according to this spectrum information adjustment.
In addition, described wireless access local resource administration module also comprises: the resource information release unit, be used to receive the frequency spectrum resource information that described transaction unit sends, and the terminal under the frequency spectrum resource situation of corresponding wireless access sub-district informed by the base station, so that terminal inserts according to new frequency spectrum resource.
The technical scheme that provides from the invention described above as can be seen, among the present invention at first according to information such as each RAT cell business volume, expection gain and interference criterium, frequency spectrum resource is distributed to different RAT sub-districts, and the gain that is obtained in the dynamic frequency spectrum deployment process is distributed to different RAT with fair with reasonable manner.The present invention can make the spectrum efficiency of wireless network and the gain of operator significantly promote; Jamming performance is protected; Performances such as service bandwidth, call congestion, service delay also obtain very big improvement.In addition, the present invention can also solve the competition and cooperation relation between the network, makes Dynamic Spectrum Management be achieved in real network.
Description of drawings
Fig. 1 illustrates centralized Dynamic Spectrum Management system construction drawing between a kind of wireless network of the present invention.
Fig. 2 illustrates the structure chart of the terminal of Dynamic Spectrum Management of the present invention system.
Fig. 3 illustrates the structure chart of the RAT local resource administration module of Dynamic Spectrum Management of the present invention system.
Fig. 4 illustrates the frequency spectrum of Dynamic Spectrum Management of the present invention system and the structure chart of gain administration module.
Fig. 5 illustrates among the present invention centralized dynamic spectrum management method flow chart between wireless network.
Fig. 6 illustrates among the present invention the optimal spectrum allocative decision search routine figure in the centralized dynamic spectrum management method between wireless network.
Fig. 7 illustrates among the present invention the interference estimation method flow chart in the centralized dynamic spectrum management method between wireless network.
Fig. 8 illustrates among the present invention the radio resource redistribution method flow chart at terminal.
Fig. 9 illustrates intermediate frequency spectrum resource cognitive approach flow chart of the present invention.
Embodiment
With reference to the accompanying drawings the present invention is described more fully, exemplary embodiment of the present invention wherein is described.
Fig. 1 illustrates centralized Dynamic Spectrum Management system construction drawing between a kind of wireless network of the present invention.Described system comprises terminal 11, base station 12, RAT local resource administration module 13 and frequency spectrum and gain administration module 14.
Fig. 2 illustrates the structure chart of the terminal 11 of Dynamic Spectrum Management of the present invention system.Terminal 11 is used for radio communication, can be mobile phone, notebook computer, desktop computer computer or any communication terminal.Described terminal 11 comprises that further environment sensing unit 111 and terminal reshuffle function management unit 112.
Be responsible for and the communicating by letter of terminal 11 and other network element described base station 12, and base station 12 can be the base station of GSM, WCDMA or any wireless communication system.Base station 12 is used for carrying out according to the control information that RAT local resource administration module 13 sends the reconfiguration course of base station 12, realizes the dynamic spectrum configuration of base station.
Fig. 3 illustrates the structure chart of the RAT local resource administration module 13 of Dynamic Spectrum Management of the present invention system.Described RAT local resource administration module 13 is used to manage the Radio Resource of corresponding RAT sub-district, further comprises transaction unit 131, traffic forecast unit 132, resource re-allocation unit 133 and resource information release unit 134.
Transaction unit 131 is unit of directly realizing the frequency spectrum trading function, is used for and each network element, holds consultation and makes a strategic decision as traffic forecast unit 132, frequency spectrum and gain administration module 14.Transaction unit 131 is used for described expection gain is sent to frequency spectrum and gain administration module, and receives the spectrum allocation may that described frequency spectrum and gain administration module return.
The load in the corresponding RAT of prediction sub-district future and the demand of frequency spectrum are responsible in traffic forecast unit 132, and this information is sent to transaction unit 131, as the amount of frequency spectrum of needs transaction, the maximum gain of this RAT sub-district expection etc.Traffic forecast unit 132 is used for calculating according to the actual volume that the wireless access sub-district has taken place the prediction traffic carrying capacity of this wireless access sub-district; And obtain the expection gain of this wireless access sub-district, and described expection gain is sent to transaction unit 131 according to the gain calculating of described prediction traffic carrying capacity and unit traffic carrying capacity.
In addition, the result that the frequency spectrum that resource re-allocation unit 133 sends according to described transaction unit is concluded the business (i.e. the frequency spectrum that can use after the transaction), adjust terminal 11 resource allocation conditions of communicating by letter, and then guarantee the quality (service bandwidth, power system capacity, cutting off rate etc.) of telex network under the situation of new frequency spectrum resource.Resource information release unit 134 is informed affiliated terminal 11 with the frequency spectrum resource situation of corresponding RAT sub-district by base station 12 according to the result of frequency spectrum transaction, helps terminal 11 to know the frequency spectrum resource that this base station is new, and then can insert.
Fig. 4 illustrates the frequency spectrum of Dynamic Spectrum Management of the present invention system and the structure chart of gain administration module 14.Described frequency spectrum is used for giving different RAT cell radio resource administrative units 13 with the frequency spectrum resource of frequency spectrum process of exchange and the gain allocation that is obtained thereof with gain administration module 14.Further comprise spectrum allocation may unit 141, gain allocation unit 142, interference assessment unit 143.
Spectrum allocation may unit 141 is assigned to different RAT sub-districts according to the demand of each transaction unit 131 with frequency spectrum resource.Spectrum allocation may unit 141 is used for determining allocative decision and sending it to the interference assessment unit, comprises the frequency spectrum that each wireless access sub-district has been distributed in this allocative decision; Be used to receive the described expection gain of described transaction unit transmission and send the gain allocation unit to, and the allocative decision that described gain unit is determined returns to described transaction unit.
In addition, described gain allocation unit 142 is also given each wireless access sub-district according to the described scheme of obtaining the greatest expected overall gain with gain allocation.
Described gain allocation unit further comprises: first computing unit of the described expection gain calculating expection overall gain of all wireless access sub-districts that are used for comprising according to described allocative decision; The allocative decision that is used for obtaining the greatest expected overall gain is defined as first selected cell of optimum distributing scheme; Be used for spectrum allocation may being given the unit that issues of wireless access local resource administration module according to described optimum distributing scheme.
Described interference assessment unit further comprises: be used for selecting the sub-district right from the wireless access sub-district, and from described sub-district centering separately selective channel form the second right selected cell of channel; Calculate second computing unit of described sub-district all channels of centering to the carrier/interface ratio that causes interference each other; And the judging unit of judging carrier/interface ratio and carrier/interface ratio thresholding height, if carrier/interface ratio be higher than the carrier/interface ratio thresholding then this channel otherwise have interference to there not being interference.
Fig. 5 illustrates among the present invention centralized dynamic spectrum management method flow chart between wireless network.Concrete method is that frequency spectrum resource and gain are periodically distributed by centralized entity.The detailed operation flow process concrete steps in each cycle are as follows:
The step 21 dynamic frequency spectrum deployment cycle begins: beginning frequency spectrum transaction cycle, Dynamic Spectrum Management is to carry out in the cycle, cycle time variable-length.
Because along with the time changes, so the supply-demand relationship of frequency spectrum also will change to the demand of frequency spectrum in each RAT sub-district thereupon.For reduce economically risk and the risk on the network service quality, frequency spectrum transaction should be periodically to carry out, and Cycle Length also should change along with the network actual state.
The prediction of step 22 traffic carrying capacity: traffic forecast unit 132 carries out the prediction of traffic carrying capacity, and predict the outcome according to traffic carrying capacity and calculate the spectrum requirement amount, and with its result notification transaction unit 131.
Forecasting Methodology can adopt history value prediction, value prediction, linear regression prediction, index return prediction etc. now.It is pointed out that Forecasting Methodology can adopt different Predicting Techniques, but the something in common of different traffic carrying capacity Forecasting Methodologies is: predict following traffic carrying capacity that does not have generation according to the traffic value of the reality that has taken place.The simplest method is present value prediction method, and the actual volume that is about to this cycle is considered as the traffic carrying capacity of next frequency spectrum transaction cycle.
Step 23 expection prediction of gain: traffic forecast unit 132 calculates the gain of expecting according to predicting the outcome of traffic carrying capacity, and its result of calculation is sent to transaction unit 131.
Though the charge difference of heterogeneous networks, it is directly related with traffic carrying capacity to gain, and it can calculate with P=L α, and wherein P is that expection gain, the L of this RAT sub-district are that the traffic carrying capacity, the α that are predicted are the gains of unit traffic carrying capacity.
Step 24 Transaction Information mutual and collecting: transaction unit 131 is with the gain of the channel width of Transaction Information such as RAT sub-district, expection, aerial position, antenna height, the transmitting power of expection base station maximum, the information such as power spectral density feature of channel, send to frequency spectrum and gain administration module 14 by request message, collect the Transaction Information that All Activity unit 131 sends by it.
The unitization of step 25 frequency spectrum resource and coding: frequency spectrum and gain administration module 14 carry out unitizations with frequency spectrum resource, be divided into the frequency spectrum unit that several equate, the bandwidth of a frequency spectrum unit can change, and each frequency spectrum unit is encoded to distinguish different frequency spectrum units.
Described coding can adopt diverse ways, relatively is typically binary coding method, and promptly each frequency spectrum unit can represent with a binary code.
The search of step 26 optimal spectrum allocative decision: frequency spectrum and 14 couples of all RAT of gain administration module are combined into the search of line frequency spectrum allocation strategy, promptly search the allocation strategy that makes the overall gain maximum, and concrete grammar is described in Fig. 6 and further part.
Frequency spectrum and gain administration module 14 are all searched for each RAT combination.Definition A is all the RAT set that participates in the dynamic spectrum transaction, i.e. A={RAT
1, RAT
2... RAT
n), x is the member (being the combination of some RAT or certain some RAT) of A, and each x set is all searched for, the result of search is the total value v (x) of the common creation of all RAT in the x set and the spectrum allocation schemes of distributing to each RAT sub-district.
Need to prove that the Search Results for the A set is the total value that this frequency spectrum exchange creates, the corresponding frequency spectrum allocative decision then is a best spectrum allocation schemes in this frequency spectrum transaction.
The distribution of step 27 frequency spectrum: spectrum allocation may unit 141 is given different RAT sub-district according to the corresponding frequency spectrum allocative decision with spectrum allocation may according to described Search Results.
The distribution of step 28 gain: the contribution of last each RAT of frequency spectrum transaction cycle is assessed according to certain criterion in gain allocation unit 142, and gives each corresponding RAT according to the result of assessment with gain allocation.
Assessment can be carried out based on several different methods, but the most basic thought is will analyze to draw each RAT total economic benefit has been produced great contribution, and then can guarantee the fairness and the reasonability of its gain allocation.
An available method is to assess the contribution of each RAT according to the method for Sharp's profit (Shapley).Still with the definition of parameter in the step 25, RAT then
iTo the contribution in this dynamic spectrum transaction be
Should
Also be RAT
iIn the transaction of this frequency spectrum the gain that should obtain.Gain allocation unit 141 will
Gain allocation give RAT
i
Step 29 is waited for the next spectrum allocation may cycle: this transaction cycle finishes, and waits for the beginning of transaction cycle next time.
Fig. 6 illustrates among the present invention the optimal spectrum allocative decision search routine figure in the centralized dynamic spectrum management method between wireless network.This searching method is searched for all RAT set, up to the spectrum allocation schemes of the best that searches the RAT set.
The set of step 32 spectral vectors generates: a spectral vectors is created for each the RAT sub-district in the RAT combination in spectrum allocation may unit 141, and forms a vector set; The frequency spectrum of corresponding RAT sub-district is distributed in each spectral vectors representative, a kind of spectrum allocation schemes of each spectral vectors set representative.
A spectral vectors is defined as R
Lx=(ζ
1, ζ
2... ζ
k..., ζ
m) refer to the frequency spectrum of distributing to i x sub-district among the RAT, wherein k is coding, the ζ of unit frequency spectrum
kBe binary, its value is got zero and is represented corresponding frequency spectrum unit not distribute to this RAT sub-district, gets and represents this frequency spectrum unit to distribute to this RAT sub-district first.All R
IxConstitute a spectral vectors collection, it represents a kind of allocative decision of distributing frequency spectrum to give each RAT sub-district.
Step 33 is determined the assigned corresponding centre frequency of vector sum in RAT sub-district: the channel quantity that each RAT sub-district is assigned in spectrum allocation may unit 141 these spectrum allocation schemes of calculating and the centre frequency of each channel.
The calculating of channel quantity has different computational methods with the calculating of centre frequency, can adopt following computational methods.Channel quantity c is
Formula calculates, and wherein B is that channel width, the K of this RAT are the quantity of distributing to the continuous frequency spectrum piece of this RAT sub-district in this spectrum allocation schemes, and b
kBe the bandwidth of k continuous frequency spectrum piece,
It is downward bracket function; The centre frequency of channel is according to the quantity of channel in the frequency spectrum blocks
Set, its method can be according to this frequency spectrum blocks is carried out
Five equilibrium, and get the centre frequency that central point is a channel.
Wherein, the gain that can obtain of RAT sub-district be with traffic carrying capacity predict the outcome and the scheme of spectrum allocation may determines.Its computational methods can have diverse ways, set according to the characteristic of different wireless networks.Enumerate the example of a kind of method below as representative.If assigned channel quantity c surpasses needed channel quantity
(promptly
) the gain P that then obtained
1The gain P that equals to expect (is P
1=P), otherwise
Wherein L is that this RAT cell flow predicted value, l then are the traffic peaks that the channel of this RAT can be supported,
It is the function that rounds up.The overall gain of this spectral vectors set then is the summation of the gain of all RAT sub-districts.
Whether step 36 has the vector set that does not generate: spectrum allocation may unit 141 judges whether the not spectral vectors of generation set in addition, if then execution in step 32 is arranged, if there is not then execution in step 37.
The search of step 38 optimal spectrum allocative decision finishes: the spectrum allocation schemes search finishes, and continues execution in step 27.
Fig. 7 illustrates among the present invention the interference estimation method flow chart in the centralized dynamic spectrum management method between wireless network.
Step 41 interference assessment begins: start from step 34.
Step 42 selects the RAT sub-district right one by one: interference assessment unit 143 is selected two RAT sub-districts one by one, promptly selects the RAT sub-district right.
Step 43 selective channel one by one is right: the channel of each RAT sub-district is distributed to based on step 33 in interference assessment unit 143, and the channel in selected two RAT sub-districts is selected any two channels one by one, and promptly selective channel is right.
Step 44 judgement carrier/interface ratio thresholding: interference assessment unit 143 judges that whether this channel to existing interference; Determination methods is relevant informations such as the height, path loss model, radius of society of geographical location information, the antenna of power spectral density feature, base station expects maximum transmission power, the base station of centre frequency, RAT channel according to channel, calculate the carrier/interface ratio that causes interference each other, and compare with the carrier/interface ratio thresholding; If being higher than the carrier/interface ratio thresholding, carrier/interface ratio judges that then this channel to there not being interference, continues the jamming performance of execution in step 45 to verify that other channels are right; Otherwise judge this channel between exist to disturb, this spectral vectors set is inapplicable, directly execution in step 47 is selected other spectral vectors set.
With a channel of GSM sub-district and a channel of WCDMA sub-district is example, can carry out according to following a kind of interference determination methods.The centre frequency of supposing the GSM channel is f
1, the maximum transmitting power of its expection is P
1, the centre frequency of WCDMA channel is f
2, the maximum transmitting power of its expection is P
2, can calculate the strongest position interfering with each other based on the positional information of antenna and the radius of sub-district, calculate interference power and the corresponding carrier/interface ratio that WCDMA and GSM cause each other in conjunction with path loss model.If WCDMA is no more than GSM carrier/interface ratio thresholding to the carrier/interface ratio of the interference of GSM, and the GSM channel is not less than WCDMA carrier/interface ratio thresholding to the carrier/interface ratio of the interference of WCDMA channel, then is judged as and do not cause interference mutually, otherwise judge and cause interference each other.
Whether step 45 exists unselected channel right: interference assessment unit 143 judges whether to exist unselected channel right, if then execution in step 43 is arranged, otherwise execution in step 46.
Whether step 46 exists unselected RAT sub-district right: interference assessment unit 143 judges whether to exist unselected RAT sub-district right, if then execution in step 42 is arranged, otherwise execution in step 47.
The end of step 47 interference assessment: if assessment result is not disturb then selection continuation execution in step 35, otherwise direct execution in step 36.
Carrying out frequency spectrum in affiliated RAT sub-district for the terminal of communicating by letter can proper communication when switching, and the present invention also provides at the radio resource redistribution method of terminal as shown in Figure 8.
At first, after spectrum allocation may finished, the resource situation that transaction unit 131 is new with this RAT sub-district was passed through message informing resource re-allocation unit 133.Resource re-allocation unit 133 is after knowing the frequency spectrum resource situation, according to information such as current business amount, network resource status, number of users, network performance, professional bandwidth, service delay, blocking rates, for the user redistributes resource.The resource of being distributed specifically comprises information such as channel, time slot, numeral, power.Terminal 11 according to certain format organization, and is given by base station broadcast with information in last resource re-allocation unit 133, the situation of resource allocation when the notifying communication terminal is switched at frequency spectrum, and then help terminal to keep communicating by letter.
For terminal can cognitive RAT sub-district the dynamic spectrum resource, the present invention also provides the frequency spectrum resource cognitive approach as shown in Figure 9.
At first, after Dynamic Spectrum Management finished, the frequency spectrum resource situation that transaction unit 131 is new with the RAT sub-district was passed through message informing resource information release unit 134.Specifying information comprises centre frequency, frequency spectrum switching time, broadcast channel centre frequency of each channel etc.Resource information release unit 134 according to certain format organization, and is broadcast to environment sensing unit 111 in the terminal 11 with information after learning the frequency spectrum resource situation, inform the new frequency spectrum resource situation of terminal, helps terminal to insert.
Claims (9)
1. centralized dynamic spectrum management method between a wireless network comprises:
The actual volume that has been taken place by the wireless access sub-district calculates the prediction traffic carrying capacity of this wireless access sub-district;
Obtain the expection gain of this wireless access sub-district according to the gain calculating of described prediction traffic carrying capacity and unit traffic carrying capacity;
Judge between each wireless access sub-district of having distributed frequency spectrum in the allocative decision whether have interference, comprising:
From the wireless access sub-district, select the sub-district right, and selective channel composition channel is right separately from described sub-district centering;
Calculate described sub-district all channels of centering to causing the carrier/interface ratio of interference each other, and compare with the carrier/interface ratio thresholding, if carrier/interface ratio be higher than the carrier/interface ratio thresholding then this channel disturb otherwise exist there not being interference;
If there is not the phase mutual interference, then obtain the expection overall gain of all wireless access sub-districts according to described described expection gain calculating of having distributed each wireless access sub-district of frequency spectrum;
From a plurality of described allocative decisions, select to obtain the allocative decision of greatest expected overall gain, and give each wireless access sub-district with spectrum allocation may, thereby obtain the spectrum allocation schemes of maximum spectrum utilance according to described allocative decision.
2. according to centralized dynamic spectrum management method between the described wireless network of claim 1, also comprise: give each wireless access sub-district with gain allocation according to the scheme of obtaining the greatest expected overall gain.
3. according to centralized dynamic spectrum management method between the described wireless network of claim 1, also comprise: by the resource allocation conditions of the wireless access sub-district terminal that adjustment is being communicated by letter according to spectrum information; And/or the terminal under the frequency spectrum resource situation of corresponding wireless access sub-district informed by the base station, so that terminal inserts according to new frequency spectrum resource.
4. centralized Dynamic Spectrum Management system between a wireless network, wherein:
Wireless access local resource administration module comprises:
The traffic forecast unit is used for calculating according to the actual volume that the wireless access sub-district has taken place the prediction traffic carrying capacity of this wireless access sub-district; And obtain the expection gain of this wireless access sub-district, and described expection gain is sent to the transaction unit according to the gain calculating of described prediction traffic carrying capacity and unit traffic carrying capacity;
The transaction unit is used for described expection gain is sent to frequency spectrum and gain administration module, and receives the spectrum allocation may that described frequency spectrum and gain administration module return;
Frequency spectrum comprises with the gain administration module:
The spectrum allocation may unit is used for determining spectrum allocation schemes and sending it to the interference assessment unit, comprises the frequency spectrum that each wireless access sub-district has been distributed in this spectrum allocation schemes; Be used to receive the described expection gain of described transaction unit transmission and send the gain allocation unit to, and the spectrum allocation schemes that described gain unit is determined returns to described transaction unit;
The interference assessment unit is judged between each wireless access sub-district of having distributed frequency spectrum in the allocative decision whether have interference, and assessment result is sent to the gain allocation unit;
The gain allocation unit is when described assessment result shows when not having the phase mutual interference, according to the described expection gain calculating expection overall gain of all wireless access sub-districts that comprise in the described spectrum allocation schemes; And the allocative decision of from a plurality of described allocative decisions, selecting to obtain the greatest expected overall gain, and described allocative decision sent to described spectrum allocation may unit.
5. according to centralized Dynamic Spectrum Management system between the described wireless network of claim 4, wherein: described gain allocation unit is also given each wireless access sub-district according to the described scheme of obtaining the greatest expected overall gain with gain allocation.
6. according to centralized Dynamic Spectrum Management system between claim 4 or 5 described wireless networks, described gain allocation unit comprises:
First computing unit of the described expection gain calculating expection overall gain of all wireless access sub-districts that are used for comprising according to described allocative decision;
The allocative decision that is used for obtaining the greatest expected overall gain is defined as first selected cell of optimum distributing scheme.
7. according to centralized Dynamic Spectrum Management system between the described wireless network of claim 6, described interference assessment unit comprises:
Be used for selecting the sub-district right from the wireless access sub-district, and from described sub-district centering separately selective channel form the second right selected cell of channel;
Calculate second computing unit of described sub-district all channels of centering to the carrier/interface ratio that causes interference each other; And
Judge the judging unit of carrier/interface ratio and carrier/interface ratio thresholding height, if carrier/interface ratio be higher than the carrier/interface ratio thresholding then this channel otherwise have interference to there not being interference.
8. according to centralized Dynamic Spectrum Management system between the described wireless network of claim 4, described wireless access local resource administration module also comprises: the resource re-allocation unit, be used to receive the frequency spectrum resource information that described transaction unit sends, and the resource allocation conditions of the terminal of communicating by letter according to this spectrum information adjustment.
9. according to centralized Dynamic Spectrum Management system between the described wireless network of claim 4, described wireless access local resource administration module also comprises: the resource information release unit, be used to receive the frequency spectrum resource information that described transaction unit sends, and the terminal under the frequency spectrum resource situation of corresponding wireless access sub-district informed by the base station, so that terminal inserts according to new frequency spectrum resource.
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| US20100216478A1 (en) * | 2009-02-20 | 2010-08-26 | Milind M Buddhikot | Method and apparatus for operating a communications arrangement comprising femto cells |
| US8711721B2 (en) | 2010-07-15 | 2014-04-29 | Rivada Networks Llc | Methods and systems for dynamic spectrum arbitrage |
| CN101945369B (en) * | 2010-09-08 | 2013-07-31 | 北京航空航天大学 | Auction and satisfaction model-based dynamic frequency spectrum allocation method |
| JP5303538B2 (en) * | 2010-11-19 | 2013-10-02 | 株式会社日立製作所 | Wireless communication system and wireless communication method |
| CN102111773A (en) * | 2011-02-28 | 2011-06-29 | 哈尔滨工业大学 | Space dynamic spectrum distribution method under urban heterogeneous wireless environment |
| CN102958057B (en) | 2011-08-25 | 2015-08-19 | 华为技术有限公司 | A kind of dynamic spectrum optimization, Apparatus and system |
| CN104221415A (en) * | 2012-02-25 | 2014-12-17 | 英特尔公司 | Method and apparatus for managing dynamic sharing of spectrum services |
| CN104185189B (en) * | 2013-05-22 | 2018-08-24 | ***通信集团浙江有限公司 | LTE system interference positioning method and device |
| CN103327497B (en) * | 2013-07-16 | 2016-01-20 | 清华大学 | Based on the wireless network frequency band allocation method of husky Puli's algorithm |
| CN105282745B (en) * | 2014-07-10 | 2018-09-07 | ***通信集团公司 | A kind of base station frequency point selection method, device and base station |
| KR20190002440A (en) * | 2016-05-06 | 2019-01-08 | 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 | Resource allocation methods, equipment and systems |
| CN106888508B (en) * | 2017-01-13 | 2020-10-16 | 北京交通大学 | Frequency spectrum allocation method applied to urban rail transit train-ground comprehensive bearing system |
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