CN101478758A - Method and system for dynamic frequency spectrum distribution - Google Patents
Method and system for dynamic frequency spectrum distribution Download PDFInfo
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- CN101478758A CN101478758A CNA2008102408715A CN200810240871A CN101478758A CN 101478758 A CN101478758 A CN 101478758A CN A2008102408715 A CNA2008102408715 A CN A2008102408715A CN 200810240871 A CN200810240871 A CN 200810240871A CN 101478758 A CN101478758 A CN 101478758A
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Abstract
The invention discloses a method and a system for dynamic frequency spectrum deployment, and comprises the following procedures: monitoring the frequency spectrum to predicate the stability of each frequency band; after user business data flow arriving at a terminal of network, obtaining the predicated result of the stability of each frequency band, deploying the user business data to different frequency band according to the function played in the business transmission quality; wherein, the user business data playing a major function in the business transmission quality is deployed to the frequency bands with higher stability and the ones playing a minor function is deployed to the frequency bands with lower stability. The invention solves the problem that when the arrival of the initial system in a frequency band leads to break off or even to lose the data transmission for users who use the frequency band to send data.
Description
Technical field
The present invention relates to the wireless communication field frequency spectrum distributing technique, be meant a kind of method and system of dynamic frequency spectrum deployment especially.
Background technology
The radio communication frequency spectrum is a kind of preciousness, Limited resources, is distributed, is licensed by unification of the motherland at present.A frequency range is generally only independently used for a wireless communication system, and different wireless communication systems uses different frequency ranges, does not disturb mutually.
But along with developing rapidly of radio communication, particularly owing to recent service and equipment based on frequency spectrum significantly increases, people are increasing to the demand of frequency spectrum resource, and frequency spectrum resource is deficient day by day.This static spectrum management mode of allocating in advance, licensing make some frequency range loaded service amount very big, and other frequency ranges does not have the user to use in the most of the time, have wasted frequency spectrum resource.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.So-called " peak value constantly " is meant in the special time period moment of traffic maximum.
At serious day by day radio spectrum resources " shortage " and " waste " problem, can solve by technological innovation based on radio system, to reach high efficiency of spectrum utilization, be used to solve this contradiction thereby the dynamic frequency spectrum deployment technology occurred.Frequency spectrum share notion based on cognitive radio is proposed first by J.Mitola, and this technology makes distributes any frequency spectrum to become possibility at any time and any place.Under this development trend, the terminal and the network equipment need possess reconfigurable ability, thus promptly can the support performance frequency and the conversion of technical parameter can use than fixed allocation frequency more frequency resources in the past.Reconfiguration technology can also be supported the change or the coexistence of communication pattern, and communication terminal can be changed the configuration of self flexibly according to wireless environment, to reach the purpose of finishing communication function.
Can suppose to have possessed the communication entity of reshuffling function, the working frequency points of Adjustment System flexibly, and be not subjected to the restriction of modulation system.This is by to the upgrading of existing system radio frequency part or design brand-new communication system and realize.
When a wireless communication system own resource deficiency, and find that the solution of prior art scheme can be divided into two classes under the situation of the temporary transient unemployed mandate frequency spectrum of other system.One class is by the method for admitting control newly arrived customer service to be assigned in the new detected idle frequency range to transmit.Another kind of method is the means of switching by alien frequencies, moves and carries out transfer of data in the new frequency range being received into user in system self frequency range.No matter adopt which kind of mode, these two class methods all have a general character, and exactly for a specific user's a specific transactions, it all is to transmit on a unique separate frequency bands.With the simplest situation, when a user initiates one when professional, this business or in the frequency range of system self, transmit, or in the new frequency range that system finds by the means of frequency spectrum detection, transmit.
Can know by above argumentation, there is following problem in existing technical scheme: a communication system takies the band transmit signal of other communication systems, when other communication systems reused this section frequency spectrum, this communication system must stop at and send user data in this section frequency spectrum.At this moment, the user who works in this section frequency spectrum just faces the danger of communication disruption.Certainly, system can detect new frequency spectrum again by the means of frequency spectrum detection, these users are switched in other new frequency range, but the time that detects new frequency spectrum be uncertain, so the time of user's interrupt communication also is uncertain.If in long period of time, all do not find these users of spectrum arrangement of one period free time to use, then probably cause these users' call drop, promptly be forced to interrupt this time professional the connection completely.
Summary of the invention
In view of this, the present invention proposes a kind of method and system of dynamic frequency spectrum deployment, and the original system that solves in a frequency range arrives, and causes taking that user that this frequency range sends data interrupts transmitting even the problem of call drop.
Method based on above-mentioned purpose a kind of dynamic frequency spectrum deployment provided by the invention comprises:
Carry out spectrum monitoring, the stability of each frequency range is predicted;
After user service data flows to and reaches network terminal, obtain predicting the outcome to each frequency range stability, be assigned to different frequency ranges according to role size in service transmission quality, wherein the user service data that role is big in service transmission quality is assigned to the higher frequency range of stability, acts on the little stable lower frequency range that is assigned to.
Optionally, this method further comprises: base layer data in this user service data stream is assigned to stablize frequency range and transmits, enhancement data in this user service data stream is assigned to inferior stable frequency range transmits.
Optionally, if this method user service data flows to when reaching network terminal, carry out layering without the overcompression coding techniques, then network terminal is further carried out layering to this user service data stream data based role size in service transmission quality, will be in service transmission quality role big be assigned to basal layer, will be in service transmission quality role less be assigned to enhancement layer.
Optionally, after predicting, the described stability to each frequency range of this method further comprises: create the frequency spectrum tabulation in network terminal, will be kept at the stability prediction result of each frequency range in the frequency spectrum tabulation.
Optionally, comprise in the tabulation of the described frequency spectrum of this method frequency range scope, bandwidth, whether be authorized to use, the stability prediction value of current whether idle and this frequency range.
Optionally, the main custom system of this method user side and each frequency range of network terminal combined monitoring uses the probable value of this frequency range to predict the stability of this frequency range in a set time section.
Optionally, after the data allocations in the described user service data of this method stream, in the frequency range of distributing in the transmission course, if current frequency range is occupied, then further comprise: inquire about frequency spectrum tabulation once more, the data flow in the current occupied layering is carried out again spectrum allocation may.
Optionally, this method further comprises: every the fixed cycle described frequency spectrum tabulation is upgraded.
Optionally, after the data allocations in the described user service data stream of this method, in the frequency range of distributing in the transmission course, if the frequency spectrum tabulation is upgraded, then inquire about the frequency spectrum tabulation once more, whether the stable information of judging current shared frequency range changes, if change, then the business datum of transmitting in this variation frequency range that is used for is redistributed.
Based on above-mentioned purpose, the present invention also provides a kind of dynamic frequency spectrum deployment system, comprises spectrum allocation may decision package and spectrum allocation may performance element; Comprise in the spectrum allocation may decision package: layered data flows information server, spectrum information server and spectrum allocation may server; Comprise in the spectrum allocation may performance element: data flow hierarchical block and spectrum allocation may Executive Module; Wherein,
Described spectrum information server is used for the stability of each frequency range is predicted, and keeps predicting the outcome of each frequency range stability;
Described layered data flows information server is used for from the information of data flow hierarchical block acquisition layered data flows;
Described spectrum allocation may server is used for from spectrum information server received spectrum information, from layered data flows information server receiving data stream information, and a customer service layered data flows is mapped on the different frequency range;
Described data flow hierarchical block is used for according in service transmission quality role size, is experimental process stream with a user service data flow point;
Described spectrum allocation may Executive Module is used for according to described spectrum allocation may server mappings result, and the data gravity flow that described data flow hierarchical block is told is assigned on the corresponding frequency range.
Optionally, the described spectrum information server of this system uses the probable value of this frequency range to predict the stability of this frequency range in a set time section by the main custom system of monitoring each frequency range.
Optionally, be provided with the frequency spectrum tabulation in the described spectrum information server of this system, will be kept at the stability prediction result of each frequency range in the frequency spectrum tabulation, and described frequency spectrum tabulation is upgraded every the fixed cycle.
Optionally, described spectrum allocation may decision package of this system and spectrum allocation may performance element are arranged in the entity that network terminal is responsible for RRM; And also being provided with the spectrum allocation may performance element in subscriber terminal side, the spectrum allocation may information that its provides according to the network terminal that receives is carried out the distribution of user service data in frequency range.
From above as can be seen, the method and system of dynamic frequency spectrum deployment provided by the invention, avoided in the prior art scheme, when main custom system is resumed when himself authorizing frequency range, the secondary user's system that works in this frequency range can occur interrupting or the situation of call drop.In the present invention, owing to splitting and be assigned on the frequency range with different stability, the business datum with a user transmits.The secondary user's system sends five-star enhancement data in the frequency range that main custom system is most possibly resumed, even being main custom system, such result arrives, this transmission loss of secondary user's system also be senior enhancement data, only can cause of short duration quality of service to descend, and can not interrupt or the situation of call drop.
Description of drawings
Fig. 1 is the data hierarchy schematic diagram of embodiment of the invention business;
Fig. 2 is the frequency allocation schematic diagram of embodiment of the invention data Layer;
Fig. 3 is the schematic flow sheet of embodiment of the invention dynamic frequency spectrum deployment;
Fig. 4 is an embodiment of the invention system configuration schematic diagram.
Embodiment
With reference to the accompanying drawings the present invention is described more fully, exemplary embodiment of the present invention wherein is described.
The present invention is intended to by with the user data layering, and the original system that utilizes method that the multistage different spectral transmits different data Layers to solve in a frequency range arrives, and causes taking that user that this frequency range sends data interrupts transmitting even the problem of call drop.Core concept of the present invention is that the basal layer with a Business Stream is put in the stable frequency range and transmits, and the enhancement layer that will lean on more is put into the method for transmission in the unsettled more frequency range, guarantees the reliability that is connected substantially of user and network.Like this, when certain detected frequency range again by its intrinsic system when shared, interrupting can not appear in the service of customer service, occurs the situations that quality of services in short-term descend at most.
Major programme of the present invention comprises:
Carry out spectrum monitoring, the stability of each frequency range is predicted;
After user service data flows to and reaches network terminal, obtain predicting the outcome to each frequency range stability, be assigned to different frequency ranges according to role size in service transmission quality, wherein the user service data that role is big in service transmission quality is assigned to the higher frequency range of stability, acts on the little stable lower frequency range that is assigned to.
Wherein, data hierarchy belongs to the category of coding techniques, and quite ripe research has been arranged in this area at present.With the vedio layering coding is example, and existing technical scheme is divided into a basal layer and a plurality of enhancement layer with a video flowing.Basal layer comprises the basic representation of multimedia sheet, and it has kept minimum communication quality.Enhancement layer comprises the fine data on the basal layer.As can be seen, enhancement layer has improved the quality of multimedia sheet.This data hierarchy process can be carried out at user terminal, also can carry out in network terminal.If user service data flows to when reaching network terminal, carry out layering without the overcompression coding techniques, then network terminal is further carried out layering to this user service data stream data based role size in service transmission quality, will be in service transmission quality role big be assigned to basal layer, will be in service transmission quality role less be assigned to enhancement layer.
And, can create the frequency spectrum tabulation in network terminal, will be kept at the stability prediction result of each frequency range in the frequency spectrum tabulation.Comprise in the tabulation of described frequency spectrum frequency range scope, bandwidth, whether be authorized to use, the stability prediction value of current whether idle and this frequency range.Can in a set time section, use the probable value of this section frequency spectrum (i.e. this frequency range) to predict the stability of this frequency range by the main custom system of user side and each frequency range of network terminal combined monitoring.
Described user service data in the transmission course, if current frequency range is occupied, then can be inquired about the frequency spectrum tabulation once more in the frequency range of distributing, the data flow in the current occupied layering is carried out again spectrum allocation may.
And, described frequency spectrum tabulation is upgraded every the fixed cycle.If described user service data is in the frequency range of distributing in the transmission course, the frequency spectrum tabulation is upgraded, then inquire about the frequency spectrum tabulation once more, whether the stable information of judging current shared frequency range changes, if change, then the business datum of transmitting in this variation frequency range that is used for is redistributed.
Base layer data in this user service data stream is assigned to stablize frequency range and transmits, enhancement data in this user service data stream is assigned to inferior stable frequency range transmits.
1, frequency range definition of stability
Because different system has very large otherness in time for the use of frequency range, such as radio data system, cellular communication system, DVB system, short range communication systems etc., all because loaded service differs from one another separately, and the time statistical property on frequency range is used has nothing in common with each other.In the present invention, wireless communication system is by in the certain hour, and for the monitoring of self wireless environment of living in, and the stability that can take out different frequency range is precondition of the present invention.Here said frequency range stability is to be used for explaining a special frequency channel amount of regular idle condition whether can occur for a long time.Certainly, the concrete define method of frequency range stability has a lot, uses the probable value P of this section frequency spectrum here in a set time section with main custom system
B, TRepresent.Wherein, main custom system above-mentioned is meant and has the usufructuary system of this section frequency spectrum, just licensed the system of special frequency channel by frequency management mechanism; Relative therewith, the secondary user's system that the back will be mentioned is meant and is not authorized to use certain frequency range, and after detecting main custom system not use its intrinsic frequency range and take the system of this frequency range work without authorization.That is to say that main custom system and secondary user's system are the relative concepts for one section specific frequency spectrum, being authorized to use the system of this section frequency spectrum is main custom system, and the system of uncommitted this frequency range of use is the secondary user's system.Main custom system and secondary user's system all comprise terminal and two aspects of network.P
B, TBe meant a secondary user's system,, come predicted value following T probability of main custom system use frequency range B in the time period according to the statistical conditions of for a long time one section frequency spectrum B being monitored.Here the value of T can define flexibly, such as 30 seconds or one minute.This depends primarily on the technical characteristic of secondary user's system.Here said technical characteristic comprises this system is fit to which kind of business of carrying, and whether has the powerful ability of reshuffling fast.P
B, TConcrete computational methods can be a lot, the simplest method is exactly that this value is set at the statistical probability that the main custom system of this time period in moment in history takies this frequency range.
2, the channel allocation of layered data flows
Core concept of the present invention is that the basal layer with a Business Stream is put in the stable frequency range and transmits, and the enhancement layer that will lean on more is put into the method for transmission in the unsettled more frequency range, guarantees the reliability that is connected substantially of user and network.Data are done merging again at receiving terminal.It is emphasized that following behavior all finished by the secondary user's system.
An example of professional data hierarchy, as shown in Figure 1, business datum is divided into basal layer 1, enhancement layer 2, enhancement layer 3 in this example ..., enhancement layer N.More by under data Layer should the business connection basis, having guaranteed should the minimum quality requirement of business.What lean on last data Layer transmission more is meticulous more data.For example:, finish the more careful of image, function more clearly by last data Layer more for video flowing; For the HTTP business, the lteral data of webpage can be defined as basal layer, and the picture of sound or link is defined as enhancement layer.That is to say that for different business, concrete data hierarchy way can be grasped flexibly, but basic thought remaining unchanged, is exactly more by lower floor's transmission basic more data for this business.
After finishing data hierarchy and frequency range stability and calculating, will carry out core of the present invention: be exactly that the secondary user's system is assigned to different user data layerings in the frequency range with different stability and transmits.
Referring to shown in Figure 2, data hierarchy shown in Figure 1 is assigned in the different frequency ranges, basal layer 1 is assigned to frequency range B
1(P
B1, T), enhancement layer 2 is assigned to frequency range B
2(P
B2, T), enhancement layer 3 is assigned to frequency range B
3(P
B3, T) ..., enhancement layer N is assigned to frequency range B
n(P
Bn, T).Fig. 2 right side is the frequency spectrum tabulation, need to prove, the tabulation of the frequency spectrum on right side should be a real-time update in Fig. 2.This renewal is by the secondary user's system and be operated in its intrasystem joint detection of users realization.Preferred P
B, TPut in order is to become big from bottom to top successively.Because P
B, TBe prediction, so P to the next T cycle
B, TShould upgrade after the period at T of every experience.Need to prove a bit that in addition the frequency range that appears in the frequency spectrum tabulation all should be the frequency range that does not take in current time master custom system.If certain frequency range appears having taken suddenly in main custom system, should be with this frequency range deletion in this table; Corresponding therewith, having found the new frequency range that is not taken if detect by main custom system, should in this table, add, and according to its P
B, TSize be placed into corresponding position.
Need to prove, for the immutable system of modulation bandwidth, such as the channel width of GSM is that the channel width of 200kHz, WCDMA is 5MHz, just can transmit data when having only bandwidth when the idle frequency range that detects greater than a channel width, certainly, when if the bandwidth of one section continuous idle frequency range is enough to hold several channel widths, also can in this section frequency spectrum, dispose a plurality of channels that lay respectively at different frequent points.If the modulation bandwidth of a communication system is variable, such as ofdm system, it can adopt the bandwidth for transmission of flexibility and changeability according to the bandwidth of idle frequency range so.So, consider above two kinds of situations, can know that a data layering can be transmitted in one or more frequency ranges; A frequency range can be held one or more data Layers.
Generally, think that the frequency range stability of secondary user's system self is the highest, can be understood as is P
B, TValue is 0 frequency range.Because the use of self frequency range is at any time can arbitrarily used frequency range by the radio regulatory organization mandate.So in the ordinary course of things, the basal layer of a data flow can be placed on the interior transmission of frequency range of secondary user's system self.
The flow process of the method embodiment of dynamic frequency spectrum deployment of the present invention is described below.In assigning process, can run into two kinds of situations:
First kind of situation is in one-period T, certain frequency range that the secondary user's system uses is resumed by main custom system, at this time the secondary user's system must stop at the signal emission of this frequency range, data flow point layer is carried out new frequency range channel allocation, and concrete steps are shown in step 306-307 among Fig. 3.Need to prove that the principle that data flow layering channel heavily distributes is constant, the basal layer that is about to a Business Stream is put in the stable frequency range and transmits, and the enhancement layer that will lean on more is put into transmission in the unsettled more frequency range.
Second kind of situation is that main custom system is not resumed frequency range, but because the frequency spectrum tabulation is a real-time update, after one-period T finished, the frequency spectrum tabulation can be inquired about by the secondary user's system, saw the P of each frequency range
B, TWhether value changes, and whether the position of frequency range in tabulation changes.If have, then carry out data flow layering channel and heavily distribute, shown in step 308-310 among Fig. 3.
Need to prove, which kind of situation no matter, the flow process in early stage all is identical, and promptly user's business arrives, and current frequency band list is inquired about in the data flow layering, layered data flows channel allocation, transmitting layered data flow.
Below row are cited an actual example, the concrete steps and the flow process that customer service are assigned to different frequency range are described.
Step 301 supposes that a user makes a call to network terminal, and the request access network also starts the business of a live video stream.
Step 302 after network terminal is successfully admitted this user, is carried out layering to user's live video stream.
Network terminal can be provided with a spectrum information server, and this spectrum information server can be by finishing the analysis to the frequency spectrum situation to the monitoring of self wireless environment of living in, and the data of retention analysis.The data here should comprise the bandwidth of each section frequency spectrum, which frequency range is that official is defined as the employed frequency range of native system (being the frequency range that native system distributes as main custom system), which frequency range is perceptible frequency range, native system is to the situation that takies of these frequency ranges, and why the stability of these frequency ranges is worth and analyzes.Because the situation of frequency spectrum is dynamic change, this spectrum information server also will constantly upgrade above information.Wherein, the frequency spectrum stability of mentioning here is exactly P defined above
B, TParameter.By way of example, can be referred to as the frequency spectrum tabulation with the form organizational information of form in the spectrum information server.Should comprise in the frequency spectrum tabulation frequency range scope, bandwidth, whether be authorized to use, information such as current whether free time and frequency spectrum stability prediction value.Wherein said stability prediction value can directly be used the probable value P of this section frequency spectrum in a set time section by main custom system described in the preamble
B, TExpression, probable value P
B, TMore little, then the stability of this frequency range is high more.
Before customer service started, network terminal also need be carried out layering to video flowing by the data flow hierarchical block, was divided into a basal layer and several enhancement layers.Basal layer decoding back generation is had the vision signal of mass of foundation, and enhancement layer can only be decoded jointly with basal layer, decoded signal quality makes moderate progress than basal layer.Information source mails to different frequency ranges with the bit stream of each layer, and the recipient also can be according to other the enhancement layer of receiving ability selective reception of oneself except that receiving basal layer.And the ability that provides the recipient between different enhancement layers, to switch.Hierarchical coding control is the effective means that prior art solves heterogeneous problem so far, does not have duplicate message between every laminar flow, but makes cost with the complexity of agreement.
Step 303, after data hierarchy finishes, system queries spectrum information server, just the frequency spectrum among Fig. 3 is tabulated, and obtains the information of corresponding available frequency band, the most important thing is to obtain the stable information of every section frequency spectrum.Concrete, this work should be finished by the spectrum allocation may server.This spectrum allocation may server be input as spectrum information, traffic flow information, and some other system necessary informations.Traffic flow information specifically is meant the information such as demand bandwidth of each data flow.
Step 304, spectrum allocation may server are output as a customer service layered data flows are mapped to the method for salary distribution on the different frequency range.This is in the lining, and the specific algorithm of spectrum allocation may can be diversified, but core concept all is that the distribution of flows the closer to basal layer is gone to stable more frequency range.For instance, when the secondary user's system detects the different frequency range of n section frequency spectrum stability, all users' basal layer can be placed in the most stable frequency range and transmit,, then other users' basal layer can be placed in the inferior stable frequency range and transmit if this frequency range is taken.Be placed on stability at first enhancement layer then and come in after a while the frequency range and transmit, by that analogy all users.
Step 305 after having assigned, just can carry out transfer of data.
Step 306, in transmission course, certain section unexpected disabled situation of cognitive frequency spectrum may appear, main custom system such as this section frequency spectrum is used this section frequency spectrum suddenly, at this time, native system stops at once in this frequency range and transmits, and corresponding, the data of this section frequency spectrum temporary transient terminal can occur or lose.For live video stream, that part of layered data flows that is in this band transmissions will be lost, the situation that video quality will occur descending.
Step 307, at this moment, the spectrum allocation may server need be inquired about the spectrum information in the spectrum information server once more, and enters step 311, data flow in the current occupied layering is carried out again spectrum allocation may, and the data hierarchy just lost of assurance can continue transmission in other frequency range like this.At this moment, the principle of spectrum allocation may is still constant.
Step 308 in addition, because the spectrum information in the spectrum information server dynamically updates, can suppose that here the update cycle of spectrum information is T.That is to say that original stable frequency range may become unsettled frequency range in next period T.
At this moment,, also can layered data flows be adjusted flexibly, will be arranged in the more stable frequency range near the data flow of basal layer again and transmit according to spectrum information news more even main custom system does not arrive.Specifically referring to step 309-311.
Step 309, the spectrum allocation may server is inquired about the spectrum information in the spectrum information server once more.
Step 310 is checked the frequency spectrum tabulation parameters in the spectrum information server, judges whether the information such as stability prediction value of current shared frequency range change, if do not have, then returns step 305, if having, then enters step 311.
Step 311 is redistributed the channel of layered data flows.
Step 312 is proceeded transfer of data.
Comprehensive above two kinds of situations analyzing can know that the layered data flows channel heavily is assigned two kinds of triggering modes.No matter be that main custom system arrives or the renewal of spectrum information, all may bring the heavily distribution of layered data flows frequency spectrum.
Need to prove that network terminal in the above-mentioned flow process in the secondary user's system and end side need be worked in coordination and be finished this process, because network terminal has been finished the decision-making work of the collection and the frequency allocation of spectrum information.So network terminal need inform how many frequencies of terminal data transmission is, terminal need be adjusted to suitable frequency work with transceiver according to the indication of network terminal.The present invention requires data to transmit simultaneously in a plurality of frequency ranges, so transceiver should may be simultaneously operated in a plurality of frequency ranges, perhaps has many cover transceivers to be operated in corresponding frequency range separately.
Based on said method, the present invention also provides embodiment dynamic frequency spectrum deployment system, and structure comprises as shown in Figure 4: spectrum allocation may decision package and spectrum allocation may performance element.Spectrum allocation may decision package and spectrum allocation may performance element can be arranged in the entity that network terminal is responsible for RRM, such as the base station in base station controller in the 3G system or the LTE system.Certainly,, can also be placed on other positions of Access Network, even be placed on and finish this function in the core net because the Position Design of this functional entity is more flexible.In addition, end side also should have the spectrum allocation may performance element, and the spectrum allocation may information that it provides according to the network terminal that receives is carried out the distribution of user service data in frequency range.
Wherein, the spectrum allocation may decision package comprises three entities, and they are respectively: layered data flows information server 401, spectrum information server 402, spectrum allocation may server 403.The spectrum allocation may performance element comprises two entities, and they are respectively: data flow hierarchical block 404, spectrum allocation may Executive Module 405.To do respectively the function of each module below and introduce.
Layered data flows information server 401 from the information of data flow hierarchical block 404 acquisition layered data flows, mainly comprises the speed of each individual-layer data, demand bandwidth etc.
Spectrum allocation may server 403 is used for from spectrum information server received spectrum information, from layered data flows information server receiving data stream information, and a customer service layered data flows is mapped on the different frequency range.This is in the lining, and the specific algorithm of spectrum allocation may can be diversified, but core concept all is that the distribution of flows the closer to basal layer is gone to stable more frequency range.
Data flow hierarchical block 404 is used for basis in service transmission quality role size, and adopting the data hierarchy technology is experimental process stream with a user service data flow point; Can comprise a basal layer and several enhancement layers in this a little stream.
Spectrum allocation may Executive Module 405 is responsible for enforcement by the concrete spectrum allocation schemes that spectrum allocation may server 403 produces, and is used for according to described spectrum allocation may server mappings result, and the data gravity flow that described data flow hierarchical block is told is assigned on the corresponding frequency range.
Description of the invention is in order to provide for the purpose of example and the explanation, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is for better explanation principle of the present invention and practical application, thereby and makes those of ordinary skill in the art can understand the various embodiment that have various modifications that the present invention's design is suitable for special-purpose.
Claims (13)
1. the method for a dynamic frequency spectrum deployment is characterized in that, comprising:
Carry out spectrum monitoring, the stability of each frequency range is predicted;
After user service data flows to and reaches network terminal, obtain predicting the outcome to each frequency range stability, be assigned to different frequency ranges according to role size in service transmission quality, wherein the user service data that role is big in service transmission quality is assigned to the higher frequency range of stability, acts on the little stable lower frequency range that is assigned to.
2. method according to claim 1, it is characterized in that, this method further comprises: base layer data in this user service data stream is assigned to stablize frequency range and transmits, enhancement data in this user service data stream is assigned to inferior stable frequency range transmits.
3. method according to claim 1 and 2, it is characterized in that, if user service data flows to when reaching network terminal, carry out layering without the overcompression coding techniques, then network terminal is further carried out layering to this user service data stream data based role size in service transmission quality, will be in service transmission quality role big be assigned to basal layer, will be in service transmission quality role less be assigned to enhancement layer.
4. method according to claim 1 is characterized in that, further comprises after described stability to each frequency range is predicted: create the frequency spectrum tabulation in network terminal, will be kept at the stability prediction result of each frequency range in the frequency spectrum tabulation.
5. method according to claim 4 is characterized in that, comprise in the tabulation of described frequency spectrum frequency range scope, bandwidth, whether be authorized to use, the stability prediction value of current whether idle and this frequency range.
6. method according to claim 4 is characterized in that, the main custom system of user side and each frequency range of network terminal combined monitoring uses the probable value of this frequency range to predict the stability of this frequency range in a set time section.
7. method according to claim 4, it is characterized in that, after the data allocations in the described user service data stream, in the frequency range of distributing in the transmission course, if current frequency range is occupied, then further comprise: inquire about frequency spectrum tabulation once more, the data flow in the current occupied layering is carried out again spectrum allocation may.
8. method according to claim 4 is characterized in that, this method further comprises: every the fixed cycle described frequency spectrum tabulation is upgraded.
9. method according to claim 8, it is characterized in that, after the data allocations in the described user service data stream, in the frequency range of distributing in the transmission course, if the frequency spectrum tabulation is upgraded, then inquire about the frequency spectrum tabulation once more, judge whether the stable information of current shared frequency range changes, if change, then the business datum of transmitting in this variation frequency range that is used for is redistributed.
10. a dynamic frequency spectrum deployment system is characterized in that, comprises spectrum allocation may decision package and spectrum allocation may performance element; Comprise in the spectrum allocation may decision package: layered data flows information server, spectrum information server and spectrum allocation may server; Comprise in the spectrum allocation may performance element: data flow hierarchical block and spectrum allocation may Executive Module; Wherein,
Described spectrum information server is used for the stability of each frequency range is predicted, and keeps predicting the outcome of each frequency range stability;
Described layered data flows information server is used for from the information of data flow hierarchical block acquisition layered data flows;
Described spectrum allocation may server is used for from spectrum information server received spectrum information, from layered data flows information server receiving data stream information, and a customer service layered data flows is mapped on the different frequency range;
Described data flow hierarchical block is used for according in service transmission quality role size, is experimental process stream with a user service data flow point;
Described spectrum allocation may Executive Module is used for according to described spectrum allocation may server mappings result, and the data gravity flow that described data flow hierarchical block is told is assigned on the corresponding frequency range.
11. system according to claim 10 is characterized in that, described spectrum information server uses the probable value of this frequency range to predict the stability of this frequency range in a set time section by the main custom system of monitoring each frequency range.
12. according to claim 10 or 11 described systems, it is characterized in that, be provided with the frequency spectrum tabulation in the described spectrum information server, will be kept at the stability prediction result of each frequency range in the frequency spectrum tabulation, and described frequency spectrum tabulation is upgraded every the fixed cycle.
13. system according to claim 10 is characterized in that, described spectrum allocation may decision package and spectrum allocation may performance element are arranged in the entity that network terminal is responsible for RRM; And also being provided with the spectrum allocation may performance element in subscriber terminal side, the spectrum allocation may information that its provides according to the network terminal that receives is carried out the distribution of user service data in frequency range.
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