CN100558003C - Dynamic spectrum management method based on the multiple use of frequency spectrum - Google Patents
Dynamic spectrum management method based on the multiple use of frequency spectrum Download PDFInfo
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Abstract
The present invention discloses a kind of dynamic spectrum management method based on the multiple use of frequency spectrum, and newly-increased Dynamic Spectrum Management system under radio regulatory organization realizes the utilization once more when unauthorized user does not use distributing frequency spectrum; The Dynamic Spectrum Management system comprises Dynamic Spectrum Management center, frequency behaviour in service database, spectrum monitoring unit and monitored actual spectrum environment for use; The Dynamic Spectrum Management center directly receives application of unauthorized user frequency spectrum and assignment frequency spectrum under rule instructs; The periodically monitoring wireless environmental change and the result reported to frequency behaviour in service database of spectrum monitoring module, the Database Dynamic record also provides frequency behaviour in service data to the Dynamic Spectrum Management center; Described rule comprises the application frame, distributes frame format, data base querying mode, spectrum allocation may mode; Between unauthorized user and Dynamic Spectrum Management system, adopt frame format transmissibility spectrum application and assignment information, realize automatic fast frequency application and distribution.
Description
Technical field
The invention belongs to wireless communication technology field.Specifically be a kind of dynamic spectrum management method, be used to improve the availability of frequency spectrum based on the multiple use of frequency spectrum.
Background technology
What existing wireless frequency spectrum rule adopted is the single-use frequency spectrum distributing method, is exactly that radio spectrum management department gives certain business with certain frequency band division, then can only be used for this business; Further, give certain wireless traffic operator (or group, department etc.) with certain frequency allocation, then this frequency range can only be used by the user under this operator, and other users can not use this frequency range.Even the former does not use this frequency range, the latter also haves no right to use this frequency range.In fact, monitor for a long time and can find that some frequency range of having distributed to radio traffic operator is not used for a long time behind the frequency spectrum resource, also having some frequency ranges is that part-time is used, and only has band segment frequently to be used.Foreign study document " Cognitive Radio ", John Welko, IEEReview, the real-time monitoring (referring to Fig. 1) that May 2005 and we carry out some frequency range has all confirmed this conclusion.Current all kinds of radio subscriber sharp increase makes radio spectrum resources very deficient.But as previously mentioned, the frequency spectrum resource behaviour in service is at present: many on the one hand have the frequency spectrum resource of the value utilized often idle, because these frequency spectrums are assigned with, make other users of many urgency radio-frequency spectrum to be used on legal principle, can not use these frequency spectrums on the other hand.This insufficient use to rare radio spectrum resources is owing to the spectrum management of current wireless electricity adopts the single-use frequency spectrum distributing method to cause, and is that management method has limited potential spectrum users and obtains the ability that frequency spectrum inserts and promptly limited making full use of frequency spectrum resource.In Radio Spectrum Resource very precious today, thereby part is revised the radio spectrum management method and is improved the availability of frequency spectrum and should be mentioned that on the agenda.The multiduty notion of the frequency spectrum that has proposed is meant digging utilization frequency spectrum " grey frequency range " or the untapped frequency range of special-purpose frequency spectrum, and this provides thinking for the modification spectrum management method.Existing radio spectrum management mode is that radio spectrum management mechanism formulates the frequency service regeulations, radio frequency user passes through in writing form to radio spectrum management mechanism demand frequency, management organization gives the radio subscriber assigned frequency by the written document form again, and its way to manage is referring to Fig. 2.
Existing radio spectrum management divides three levels: frequency band division, frequency allocation, channel allocation.The object and the execution mode thereof of three levels are as shown in table 1.
| Title | Level | Object | Enforcement side |
| Frequency band division | High | Professional | Top supervising management |
| Frequency allocation | By | Department | Frequency management department |
| Channel allocation | Low | The radio station | The wireless network network operator |
Table 1
Frequency band division: the frequency band that certain is specific is listed table of frequency allocations in, stipulates that this frequency band can be for one or more ground or space radio communication business or radio astronomy service use under the formulation condition.
Frequency allocation: the radio frequency band regulation by one or more departments, is used under the formulation condition for ground or space radio communication business in the zone of appointment.
Channel allocation: under rated condition, use to certain radio station channel allocation.
In sum, existing radio spectrum management method is fit to the fixed frequency spectrum of authorized user is distributed and assignment.And to consider unauthorized user to distributing frequency spectrum reusing under operating position not, and when authorized user arrives the keeping out of the way in real time of unauthorized user, depend merely on existing wireless frequency spectrum management method and can not finish.This need design a kind of dynamic spectrum management method, special department is set simultaneously to be the unauthorized user assigned frequency.Therefore, need design a kind of, as replenishing and revising to the existing radio spectrum management method based on the dynamic spectrum management method of cognitive radio technology to unauthorized user.Spectrum management system after the improvement can provide spectrum management for authorized user according to existing mode, provides spectrum management according to the Dynamic Spectrum Management mode for unauthorized user simultaneously.
Summary of the invention
At the existing deficiency of existing radio spectrum management method, for satisfying unauthorized user to distributing frequency spectrum reusing under operating position not, the present invention proposes the dynamic spectrum management method based on the multiple use of frequency spectrum, as additional and modification, dynamically manage unauthorized user and use frequency spectrum the existing radio spectrum management method.The present invention will be by applying for authorized frequency range and can using user's (being generally the registered user of certain wireless traffic operator) of the frequency range of having distributed to be defined as authorized user uninterruptedly; Under certain rule, reuse to have distributed to the frequency range of authorized user and do not influenced other authorized user the normal user definition that uses (being generally separately or the casual user of groupuscule) of frequency range is unauthorized user.This type of unauthorized user should have certain victory and become the radio ability.This specification is mainly studied unauthorized user and is used to improve the availability of frequency spectrum again to what authorize frequency range.
For achieving the above object, technical scheme of the present invention is newly-increased Dynamic Spectrum Management system under radio regulatory organization, realizes that unauthorized user is to distributing the once more utilization of frequency spectrum when not using; The Dynamic Spectrum Management system comprises Dynamic Spectrum Management center, frequency behaviour in service database, spectrum monitoring unit and monitored actual radio frequency environment for use; Wherein, the Dynamic Spectrum Management center directly receives the frequency spectrum application of unauthorized user and finishes the assignment of its frequency spectrum under rule instructs; The spectrum monitoring unit periodically the monitoring wireless environment variation and monitoring result reported to frequency behaviour in service database, frequency behaviour in service Database Dynamic record also provides frequency behaviour in service data to the Dynamic Spectrum Management center; Unauthorized user and authorized user have then constituted the user in the monitored actual wireless frequency environment for use; Described rule comprises the application frame, distributes frame format, data base querying mode, spectrum allocation may mode; Unauthorized user sends application to the Dynamic Spectrum Management center and adopts application frame form, the Dynamic Spectrum Management center is Query Database under the guidance of querying method, carry out spectrum allocation may, and, realized between unauthorized user and Dynamic Spectrum Management system with frame format transmissibility spectrum application and spectrum allocation may information with the form answer unauthorized user of allocation result with the distribution frame.
Unauthorized user application process of the present invention and Dynamic Spectrum Management central dispense process rely on network to realize that the spectrum monitoring unit is the variation of monitoring wireless environment periodically, and monitoring result is fed back to frequency spectrum behaviour in service database; Database is just done corresponding change and real time record frequency spectrum cavity-pocket related data according to monitoring result; When the demand of a unauthorized user generation to frequency spectrum, just demand information and individual relevant information are constituted the application frame according to the application frame format, send to the Dynamic Spectrum Management center automatically by network; After this application frame is received at the Dynamic Spectrum Management center, at first application user's information is analyzed, then according to the empty grade of elder generation, empty again stability, the principle inquiry frequency spectrum behaviour in service database of last empty bandwidth, customer requirements and the available frequency spectrum resource that inquires are compared, for the application user selects suitable frequency spectrum, and selection result distributed frame according to distributing frame format to require to constitute, automatically send to the application user by network, this has just finished the automatic application of unauthorized user and the automatic-answering back device at Dynamic Spectrum Management center, be implemented on the communication line automatically, fast frequency application and distribution.
Unauthorized user of the present invention employed frequency application frame format and major parameter are:
Application frame: 50 bits
Frame head Head:8 bit
User's number of registration Number:7 bit
Class of subscriber Type:1 bit
Request for data Data:23 bit
Urgency level Emergency:1 bit
Power lower limit PowerDown:8 bit,
Other Other: keep 2 bits.
Employed distribution frame format in Dynamic Spectrum Management of the present invention center and major parameter are:
Distribute frame: 47 bits
Frame head Head:8 bit
User's number of registration Number:7 bit
Response status Response:3 bit
Distribute data Data:19 bit
Power upper limit PowerUp:8 bit
Other other: keep 2 bits.
The present invention receives the application frame that unauthorized user sends, and Dynamic Spectrum Management center Query Database sends the corresponding frame that distributes, and carries out frequency dynamic and distributes:
If satisfactory frequency range is arranged, will distribute that response status Response is changed to 001 in the frame, the application of expression unauthorized user is to suitable frequency range, and distribute data item Data item is filled in the details about the frequency range of applying for;
If there is not satisfactory frequency range, will distribute that response status Response is changed to 011 in the frame, the expression network is no-trunk, and application is rejected;
If application information is indeterminate, will distribute the response status Response in the frame to be changed to 100, expression information is not exhaustive, needs further to consult;
If do not carry user's number of registration Number in the application frame, will distribute the response status Response of frame to be changed to 000, expression is considered as inactive users and is not distributed;
If distribute frame response status Response to be changed to 010, the frequency range that expression is applied for could be used after postponing a period of time because of some reason.
Compare with existing radio spectrum management method, the present invention has following characteristic: the newly-increased down Dynamic Spectrum Management system of radio regulatory organization directly finishes the assignment to the unauthorized user frequency spectrum, and need be through the frequency allocation process to wireless traffic operator in the existing spectrum allocation may process.The frequency spectrum application of unauthorized user and the spectrum allocation may of Dynamic Spectrum Management system are different from the mode of passing through file transfers that existing radio spectrum management adopts, but under the guidance of frame format and management method, finish automatically.
Description of drawings
One day the availability of frequency spectrum of each frequency of Fig. 1 935～960MHz frequency range
Fig. 2 existing radio spectrum management method schematic diagram
Fig. 3 existing radio spectrum allocation may, assignment level and Dynamic Spectrum Management assignment level be schematic diagram relatively
Fig. 4 Dynamic Spectrum Management system constitutes and the management method schematic diagram
Fig. 5 Dynamic Spectrum Management central database querying flow figure
Fig. 6 Dynamic Spectrum Management central dispense flow chart
Fig. 7 application frame format major parameter schematic diagram
Fig. 8 distributes frame format major parameter schematic diagram
Fig. 9 frequency dynamic assigning process figure
The wireless frequency spectrum behaviour in service figure of 908～910MHzGSM frequency range in Figure 10 specific embodiment
Figure 11 expectation takies the application frame format of a channel
Figure 12 applies for successful distribution frame format corresponding to Figure 10
Figure 13 is corresponding to the described situation of Figure 10, Figure 11, and the spectrum monitoring unit monitors the wireless frequency spectrum behaviour in service figure that unauthorized user takies a channel
Figure 14 expectation takies the application frame format of two successive channels
Figure 15 applies for successful distribution frame format corresponding to Figure 13
Figure 16 is corresponding to the described situation of Figure 13, Figure 14, and the spectrum monitoring unit monitors the wireless frequency spectrum behaviour in service figure that unauthorized user uses two successive channel transport services
The unaccepted distribution frame format of Figure 17 application
Embodiment
With reference to above-mentioned accompanying drawing, the specific embodiment of the present invention is described in further detail.
Referring to Fig. 3, the present invention sets up a Dynamic Spectrum Management system under existing radio spectrum management mechanism, directly be the unauthorized user assigned frequency, as replenishing and revising the existing radio spectrum management method.Spectrum management system after the improvement can provide spectrum management for authorized user according to existing mode, provides spectrum management according to the Dynamic Spectrum Management mode for unauthorized user simultaneously.
(1) formation of Dynamic Spectrum Management system
Referring to Fig. 4, the Dynamic Spectrum Management system is made of jointly Dynamic Spectrum Management center, frequency behaviour in service database, spectrum monitoring unit and monitored actual radio frequency spectrum environment for use.Described Dynamic Spectrum Management center is under " rule " instructs, and directly receives the frequency spectrum application of unauthorized user and finishes the assignment of its frequency spectrum; Described spectrum monitoring unit periodically the monitoring wireless environment variation and monitoring result reported to frequency behaviour in service database, frequency behaviour in service Database Dynamic record also provides frequency behaviour in service data to the Dynamic Spectrum Management center; Unauthorized user and authorized user have then constituted the user in the monitored actual wireless frequency environment for use; It is that the Dynamic Spectrum Management rule comprises the application frame, distributes frame format, data base querying mode, spectrum allocation may mode etc. that the present invention is used to instruct " rule " of Dynamic Spectrum Management system; Unauthorized user sends application to the Dynamic Spectrum Management center and adopts application frame form, the Dynamic Spectrum Management center is Query Database under the guidance of querying method, carry out spectrum allocation may, and, realized between unauthorized user and Dynamic Spectrum Management system with frame format transmissibility spectrum application and spectrum allocation may information with the form answer unauthorized user of allocation result with the distribution frame.
(2) on the communication line automatically, fast frequency application and distribution
Referring to Fig. 5, Fig. 6, unauthorized user application process and Dynamic Spectrum Management central dispense process rely on network to realize fully.The spectrum monitoring unit is the variation of monitoring wireless environment periodically, and monitoring result is fed back to frequency spectrum behaviour in service database, and database is just done corresponding change according to these testing results.For example a certain authorized user finishes authorizing the use of frequency range, the spectrum monitoring unit is when doing periodic monitoring, will monitor this frequency band power decline and report to frequency spectrum behaviour in service database immediately, the frequency range free time at this moment just represented in the low-power of this frequency range record in the database.In case unauthorized user produces the demand to frequency spectrum, just the application information (as caller place, required bandwidth, required empty stability, type of service, subscription services time etc.) with oneself constitutes the application frame according to the application frame format, sends to the Dynamic Spectrum Management center automatically by network.After this application frame is received at the Dynamic Spectrum Management center, at first application user's information is analyzed, then as shown in Figure 5, at database earlier empty grade, inquiry frequency spectrum behaviour in service database under the guidance of empty stability, last empty bandwidth querying method again, customer requirements and the available frequency spectrum resource that inquires are compared, for the application user selects suitable frequency range, at last selection result is distributed frame according to distributing frame format to require to constitute, automatically send to the application user by network, this allocation flow is seen Fig. 6.If apply for successfully, unauthorized user is just received after the relevant information of distributing frequency range immediately or is postponed a period of time and inserts and use this frequency range, inserting this frequency band power of back just raises, this variation can be noticed in periodic observation process by the spectrum monitoring unit equally, equally this monitoring result is fed back to frequency spectrum behaviour in service database, just expression this frequency spectrum this moment is not idle for the high power of this frequency range record in the database, this has just finished the automatic application of unauthorized user and the automatic-answering back device at Dynamic Spectrum Management center, be implemented in the Dynamic Spectrum Management overall process on the communication line automatically, fast frequency application and distribution.
(3) unauthorized user frequency application frame format
Unauthorized user has spectrum requirement, but does not have special-purpose channel available, so must be to Dynamic Spectrum Management center application authorized user no idle channels transport service this moment.As unauthorized user, know nothing its user profile at the Dynamic Spectrum Management center, can't carry out spectrum allocation may, this just needs unauthorized user to pass through the mode that certain both sides admit to transmit its personal information to the Dynamic Spectrum Management center at all, and this mode is applied for frame format exactly.The Dynamic Spectrum Management center has only the specifying information (as required bandwidth, stability requirement, subscription time etc.) that could understand the application user by the application frame of unauthorized user, for it searches suitable channel.
1. apply for frame format and parameter
Referring to Fig. 7, according to the Dynamic Spectrum Management rule, used application frame format and the major parameter of unauthorized user of the present invention is as follows:
Application frame: 50 bits.
Head frame head: 8 bits
Number user's number of registration: 7 bits, the application user is arranged in the position of application queue.The user arrives the back and requires queuing to constitute application queue according to type of service, urgency level etc., and formation can be held number of users and be no more than 100.
Type class of subscriber: 1 bit.
1: have cognitive function, do not need the Dynamic Spectrum Management center to seek operational channel for it, itself just has spectrum monitoring and locating function, searches for suitable frequency spectrum for it automatically and uses.
0: do not have cognitive function, need the Dynamic Spectrum Management center to search suitable frequency spectrum for utilizing for it.
The Data request for data:
Utilized bandwidth: 9 bits, finish the required bandwidth of its professional transmission.Here suppose that unauthorized user is no more than 400kHz to gsm system application frequency range and bandwidth application, have following two kinds of situations:
Situation 1: bandwidth application is smaller or equal to 200kHz
Situation 2: bandwidth application is greater than 200kHz, smaller or equal to 400kHz
More than 2 kinds of situations, 9 bits are expressed as follows, the kHz of unit:
Situation 1:0 * * * * * * * *, highest order 0 expression bandwidth is smaller or equal to 200, and actual value is calculated by back 8 bits.
Situation 2:1 * * * * * * * *, highest order 1 expression bandwidth is greater than 200 but smaller or equal to 400, and actual value adds that by 200 numerical calculation obtains shown in 8 bits of back.
For example:
000100000 expression bandwidth is smaller or equal to 200kHz, and back 8 bits 00100000 calculate 64kHz
Smaller or equal to 400kHz, 200 add that back 8 bits 00100000 calculate 200+64=264 (kHz) to 100100000 expression bandwidth greater than 200kHz
Service time: in the professional required transmission time, there is situation in following 3 in 6 bits:
Situation 1: business such as phone, fax, the transmission time is very short, smaller or equal to 10min
Situation 2: video traffic etc., the transmission time is greater than 10min, smaller or equal to 60min
Situation is the transmission time more than 3: one hours
Corresponding above three kinds of situations, 6 bit representations are as follows, the min of unit:
Situation 1:00 * * * *, back four bit representations are smaller or equal to 10
Situation 2: * * * * * *, six bit representations are greater than 10, smaller or equal to 60 altogether
Situation 3:111111, expression was greater than one hour
The place to use: 2 bits, for the user selects suitable frequency spectrum behaviour in service database.
00: the Sector East
01: the South Area
10: the Westbound
11: the North Area
Stability: 2 bits, for finishing the desired empty stability of its professional transmission.
00: low stability
01: middle stability
10: high stability
Type of service: 2 bits.
00: voice
01: data
10: video
Speech business: according to the speech characteristics, service traffics are little, and empty stability requirement is not high, and is real-time, and empty class requirement is not high
Data service: real-time is less demanding, and service traffics are placed in the middle, and in the middle of the empty stability requirement, accuracy is placed in the middle, and empty class requirement is placed in the middle
Video traffic: the real-time height, service traffics are big, and empty stability requirement is the highest, the accuracy height, empty class requirement is the highest
The caller geographical position: 2 bits, the application user produces ground.
00: the Sector East
01: the South Area
10: the Westbound
11: the North Area
Emergency urgency level: 1 bit.
The Emergency=1 emergency is handled at once, and priority is the highest
Emergency=0 is non-emergent according to the regular traffic processed
PowerDown power lower limit: 8 bits are its professional required minimum emissive power of normal transmission.
Other: other keeps 2 bits.
2. application regulation
Condition: the user is a unauthorized user, has the prompt radio function that becomes.
Traffic carrying capacity: traffic carrying capacity can not be too big, and the duration can not be oversize, because instability appears in frequency spectrum cavity-pocket and randomness is strong.
(4) Dynamic Spectrum Management central dispense frame format
Application result has been arranged, and the application user will be given with the application result backspace by certain mode in the Dynamic Spectrum Management center, and unauthorized user could insert according to application result and distribute frequency range or further application, and this mode is distributed frame format just.Have only application and do not have distribution, just there is not meaning in application, and unauthorized user also can't be realized channeling.If apply for successfully the information of then backspace about the application frequency range, indeterminate or do not apply for successfully as if application information, the further exchange of information of Dynamic Spectrum Management center and unauthorized user then, this communication process is also finished by the distribution frame.
Referring to Fig. 8, according to the Dynamic Spectrum Management rule, used distribution frame format and the major parameter in Dynamic Spectrum Management of the present invention center is as follows:
Frame structure: 47 bits.
Head frame head: 8 bits.
Number user's number of registration: 7 bits, with the Number in the application frame format.
Response response status: 3 bits.
000 non-registered users is invalid
001 has distributed
010 postpones distributing (postponement)
011 is no-trunk, refusal
100 have a question, and consult again
Data distribute data: Response be 001 o'clock meaningful, 19 bits, Response are other, this is empty.
Centre frequency 13 bits are applied for the centre frequency of frequency range.
In the gsm system, 13 bits are expressed as follows, the MHz of unit:
Preceding 10 bits are represented the integer-bit of frequency, and back 3 bits are represented decimal place, between the two with separating
0:200 applies for a GSM channel
1:400 applies for two continuous GSM channels.At this moment distribute frame to represent to apply for two continuous channels altogether with two.Here two are distributed the bandwidth of frame all to be made as 1, represent unauthorized user application to two a continuous channel, rather than two unauthorized user SEPARATE APPLICATION to two channels.
00: white empty
01: ash is empty
10: black empty
00: low stability
01: middle stability
10: high stability
The 0:OFDM modulation
The PowerUp power upper limit: 8 bits, the W of unit does not influence the maximum power of other authorized user or unauthorized user proper communication.
Other: keep 2 bits.
(5) frequency dynamic assigning process
The frequency dynamic assigning process is seen Fig. 9.Unauthorized user sends the application frame to the Dynamic Spectrum Management center, and Dynamic Spectrum Management center Query Database sends the corresponding frame that distributes then, and multi-form distribution frame applicable cases is different with implication.If satisfactory frequency range is arranged, will distribute that Response is changed to 001 in the frame, the application of expression unauthorized user is to suitable frequency range, and the Data item is filled in the details about the frequency range of applying for.If there is not satisfactory frequency range, will distribute that Response is changed to 011 in the frame, the expression network is no-trunk, and application is rejected.If application information is indeterminate, will distribute the Response in the frame to be changed to 100, expression information is not exhaustive, needs further to consult.If Response is changed to 000, do not carry user's number of registration Number in the expression application frame, be considered as inactive users and do not distributed.If Response is changed to 010, the frequency range that expression is applied for could be used after postponing a period of time because of some reason.
Referring to Figure 10, the monitoring means monitoring obtains the wireless frequency spectrum behaviour in service as relating to the GSM frequency range of 908～910MHz in the Dynamic Spectrum Management system, and channel spacing is 200kHz.Graphical meanings is as follows: each rectangle is represented a channel, the rectangle width is corresponding to channel bandwidth 200kHz, the rectangle height is corresponding to channel power, the centre frequency of this channel of numeral below the rectangle, numeral cavity stability in the rectangle is this channel idle probability in a day, and 1,2,3 represent basic, normal, high empty stability respectively.The dotted line A, the B that pass rectangle are used to distinguish black empty, ash sky and white empty, the rectangle height is higher than A and represents that this channel is that this channel is being used for black sky, the rectangle height is lower than dotted line B and represents that these channels are that white sky is only to have background noise on the channel, the channel of rectangle height between dotted line A, B is that ash is empty, be that power is less on this channel, can also use for unauthorized user.For example first rectangle represents that centre frequency is 908MHz, and bandwidth is 200kHz, and the ash that empty stability is low is empty.Can derive the implication of other rectangle successively, thereby obtain 908～910MHzGSM frequency range wireless frequency spectrum behaviour in service.
When a unauthorized user sends when application to the Dynamic Spectrum Management center, because user's application information difference, the Query Result that Dynamic Spectrum Management center Query Database obtains is just different, and wireless environment variation subsequently is just different, now enumerates four embodiment and further specifies:
Embodiment 1, and unauthorized user sends the application frame format as shown in figure 11: each meaning of parameters is: Number 0101110, promptly in the formation the 2nd
1+ 2
2+ 2
3+ 2
5=46 application users; Type 1 expression does not have cognitive radio function; First 01011001 is required bandwidth 2 among the Data
0+ 2
3+ 2
4+ 2
6=89kHz, second 000011 is required reservation actual 2
0+ 2
1=3min, the 3rd 10 promptly is positioned at the Westbound to conversation, and the 4th 00 is that empty stability is low, and the 5th 00 is the speech business type, and the 6th 10 i.e. conversation sent the user and is positioned at the Westbound; 0 expression non-emergency call among the Emergency; 00001111 is and guarantees that user's basic service demand transmitting power lower limit is 2 among the PowerDown
0+ 2
1+ 2
2+ 2
3=15W.Above user applies information reduces: the 46th application user in the formation, do not have the cognitive radio ability, required bandwidth 89kHz, subscription calls 3 minutes, conversation place are in the Westbound, type of service is voice, the cavity stability is low, the calling subscriber is positioned at Westbound, non-emergent conversation, and the required minimum power of conversing is 15W.Dynamic Spectrum Management center Query Database has found satisfactory channel, carries this channel information and send to the user in distributing frame, distributes frame format and parameter to see shown in Figure 12: Number0101110 is the 2nd
1+ 2
2+ 2
3+ 2
5=46 application users; Response 1 tabular form has appropriate channel to distribute; The centre frequency that first 1110001101|000 is channel distribution among the Data is 2
0+ 2
2+ 2
3+ 2
7+ 2
8+ 2
9=909MHz, second 0 expression applies for that the bandwidth of channel is 200kHz, and the 3rd 00 expression is white empty, and the 4th the 00 empty stability of expression is low, and the 5th 0 expression modulation system is the OFDM modulation; PowerUp 00011110 expression should not be higher than 2 for the transmitting power that does not influence other user's proper communication
1+ 2
2+ 2
3+ 2
4=30W.Response message is: the 46th application user successfully applies for channel, channel bandwidth 200kHz, and centre frequency is 909MHz, white empty, empty stability is low, adopts OFDM modulation system and transmitting power less than 30W.After a period of time, the user brings into use this channel, and the variable power that the spectrum monitoring unit will monitor this channel as shown in figure 13.Notice that the power on the 909MHz channel has surpassed dotted line A, illustrate that channel is occupied at this moment, report to frequency spectrum at once and use database, make it do corresponding modification and represent that this frequency range is not idle.
Embodiment 2, and unauthorized user application frame format removes that first the 101101010 required bandwidth of expression is 2 among the Data as shown in figure 14
1+ 2
3+ 2
5+ 2
6+ 200=306kHz, other implication and Figure 11 are just the same.So user's application information is: the 46th application user in the formation, do not have the cognitive radio ability, required bandwidth 306kHz, subscription calls 3 minutes, conversation place are in the Westbound, type of service is voice, required empty stability is low, the calling subscriber is positioned at the Westbound, non-emergent conversation, and the required minimum power of conversing is 15W.Notice that this user needs the bandwidth of 306kHz, above a channel bandwidth but less than two successive channel bandwidth.The distribution frame format of beaming back behind the Query Database of Dynamic Spectrum Management center is as shown in figure 15: remove among the Data first 1110001100|100 and 1110001101|000 and represent that the centre frequency of channel distribution is 2
2+ 2
3+ 2
7+ 2
8+ 2
9+ 2
3* 0.1=908.8MHz and 2
0+ 2
2+ 2
3+ 2
7+ 2
8+ 2
9=909MHz, second 1 expression applies for that the bandwidth of channel is 400kHz, and the 3rd 00 expression is white empty, and in the 4th 01 and 00 adjacent two channels of the expression cavity stability and beyond low, other implication is with shown in Figure 12 the same.So response message is: the 46th application user successfully applies for two continuous channels, bandwidth 400kHz, and centre frequency is respectively 908.8MHz and 909MHz, and is white empty, with low, adopts OFDM modulation system and transmitting power less than 30W in the empty stability.After a period of time, the user brings into use this continuous two channels, and the variable power that the spectrum monitoring unit will monitor this channel as shown in figure 16.Notice that the power on 908.8MHz and 909MHz two channels has all surpassed dotted line A, illustrate that these two continuous channels are occupied at this moment, report to frequency spectrum at once and use database, make it do corresponding modification and represent that this two frequency range is not idle.
Embodiment 4, when the desired empty stability of unauthorized user or bandwidth are not being met, when perhaps not having idle channels in the frequency range that applied for this moment, the distribution frame format all can be as shown in figure 17, the Number item is represented the 46th application user in the formation, Response 011 expression refusal channel distribution, PowerUp represents that transmitting power must not surpass 30W.
The angle that discloses from management level more than is discussed, is improved the dynamic spectrum management method based on the multiple use of frequency spectrum of the availability of frequency spectrum.Persons skilled in the art can obtain other embodiment by the dynamic spectrum management method based on the multiple use of frequency spectrum proposed by the invention as can be known under the situation that does not exceed the claim scope.
Claims (4)
1, a kind of dynamic spectrum management method based on the multiple use of frequency spectrum, newly-increased Dynamic Spectrum Management system under radio management mechanism realizes that unauthorized user is to distributing the once more utilization of frequency spectrum when not using; Described Dynamic Spectrum Management system comprises Dynamic Spectrum Management center, frequency behaviour in service database, spectrum monitoring unit and monitored actual radio frequency spectrum environment for use; Wherein, the Dynamic Spectrum Management center under rule instructs, directly receive the frequency spectrum application of unauthorized user and finish its frequency spectrum assignment; The spectrum monitoring unit periodically the monitoring wireless environment variation and monitoring result reported to frequency behaviour in service database, the record of frequency behaviour in service Database Dynamic also provides frequency behaviour in service data to the Dynamic Spectrum Management center; Unauthorized user and authorized user have then constituted the user in the monitored actual wireless frequency spectrum environment for use; Described rule comprises the application frame, distributes frame format, data base querying mode and spectrum allocation may mode, and described application frame is that unauthorized user sends spectrum requirement application information and the used frame format of individual relevant information to the Dynamic Spectrum Management center; Described distribution frame format is the frame format that the application user is returned the spectrum allocation may result at the Dynamic Spectrum Management center; Described data base querying mode for the Dynamic Spectrum Management center receive the application frame after, at first application user's information is analyzed, then to database according to first empty grade, the inquiry mode of empty stability and last empty bandwidth again, enquiry frequency behaviour in service database; Described spectrum allocation may mode will be applied for customer requirements and the utilizable frequency spectrum resource that inquires for the Dynamic Spectrum Management center and be compared, and for the application user selects suitable frequency range, and distribute frame to answer the selection result formation and will apply for the user; Send the application frame by unauthorized user to the Dynamic Spectrum Management center, data query mode Query Database is pressed at the Dynamic Spectrum Management center, carry out spectrum allocation may, and, be implemented in and rely on network frame format transmissibility spectrum application and spectrum allocation may information between unauthorized user and the Dynamic Spectrum Management system the form answer unauthorized user of allocation result with the distribution frame.
2, according to right instructions for use 1 described dynamic spectrum management method based on the multiple use of frequency spectrum, it is characterized in that: frequency application frame format and major parameter that unauthorized user uses are as follows:
Application frame: 50 bits
Frame head Head:8 bit
User's number of registration Number:7 bit
Class of subscriber Type:1 bit
Request for data Data:23 bit
Urgency level Emergency:1 bit
Power lower limit PowerDown:8 bit
Other Other: keep 2 bits.
3, the dynamic spectrum management method based on the multiple use of frequency spectrum according to claim 1 is characterized in that: distribution frame format and the major parameter that use at the Dynamic Spectrum Management center are as follows:
Distribute frame: 47 bits
Frame head Head:8 bit
User's number of registration Number:7 bit
Response status Response:3 bit
Distribute data Data:19 bit
Power upper limit PowerUp:8 bit
Other Other: keep 2 bits.
4, according to claim 1 or 3 described dynamic spectrum management methods based on the multiple use of frequency spectrum, it is characterized in that: described Dynamic Spectrum Management center receive behind the application frame of unauthorized user, Query Database, according to the spectrum allocation may mode, send the corresponding frame that distributes, carry out frequency dynamic and distribute:
If satisfactory frequency range is arranged, will distribute the response status Response in the frame to be changed to 001, the application of expression unauthorized user is to suitable frequency range, and distribute data item Data fills in the details about the frequency range of applying for;
If there is not satisfactory frequency range, will distribute the response status Response in the frame to be changed to 011, the expression network is no-trunk, and application is rejected;
If application information is indeterminate, it is 100 that the response status in the distribution frame is put Response, and expression information is not exhaustive, needs further to consult;
If do not carry user's number of registration Number in the application frame, will distribute the response status Response in the frame to be changed to 000, expression is considered as inactive users and is not distributed;
If distribute the response status Response of frame to be changed to 010, the frequency range that expression is applied for is because could use after postponement a period of time of some reason.
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| WO2012174715A1 (en) * | 2011-06-22 | 2012-12-27 | Nokia Corporation | Method and apparatus for spectrum management |
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| WO2012174715A1 (en) * | 2011-06-22 | 2012-12-27 | Nokia Corporation | Method and apparatus for spectrum management |
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