CN102595420A - Dynamic spectrum management system and method - Google Patents
Dynamic spectrum management system and method Download PDFInfo
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Abstract
The invention discloses a dynamic spectrum management system and method. The spectrum management method comprises the steps: an authoring system management module carries out signaling interaction with authoring systems with a signaling interaction channel to obtain idle frequency spectrum information capable of being distributed of the authoring systems; a cognitive radio system management module carries out signaling interaction with cognitive radio systems to obtain idle frequency spectrum information detected by the cognitive radio systems and receive a frequency application of the cognitive radio systems and inform the distributed frequency to the cognitive radio systems; an interference estimation module estimates the interference of each authorizing system when each cognitive radio system occupies each idle frequency spectrum of each authorizing system according to the idle frequency spectrum information in a frequency spectrum database; and a frequency spectrum allocation module allocates idle frequency spectrums of the authorizing systems for the cognitive radio systems according to an interference estimation result, the idle frequency spectrum information and the frequency demand of the cognitive radio systems. By applying the invention, a plurality of authorizing systems and a plurality of cognitive radio systems efficiently, fairly and reliably dynamically share frequency spectrum resources.
Description
Technical field
The present invention relates to the communication technology, relate in particular to a kind of Dynamic Spectrum Management system and method.
Background technology
In traditional radio spectrum management, adopt single-use, the fixed frequency spectrum method of salary distribution to give certain wireless traffic with certain frequency band division, again this band segmentation is become some frequency ranges, license to different wireless traffic operators respectively and use.On certain frequency range; The wireless access system of authorizing certain operator uses the right of this frequency range in all the period of time, whole geographic area; Even it is frequency of utilization not, other system also haves no right to use this band frequency, and this having authorizes the system of frequency spectrum to be called authoring system.
Also have a kind of cognitive radio system (CR), take the information of frequency spectrum through the system of obtaining the authorization, under the prerequisite that does not influence authoring system communication, select idle frequence to communicate, when authoring system was resumed frequency, CR wanted to return in time frequency.
Because cognitive radio system can have a plurality of; Authoring system also can have a plurality of; For make frequency spectrum resource can by efficient, fair, utilize reliably, let a cognitive radio system can use the idle frequency range of a plurality of authoring systems neatly, and the idle frequency spectrum of an authoring system can be used by a plurality of cognitive radio systems; A kind of system need be provided, be used between a plurality of cognitive radio systems and a plurality of authoring system, carrying out spectrum management.
Summary of the invention
In view of this, the invention provides a kind of Dynamic Spectrum Management system and method, be used between a plurality of cognitive radio systems and a plurality of authoring system, carrying out spectrum management, to improve the availability of frequency spectrum.
Technical scheme of the present invention specifically is achieved in that
A kind of Dynamic Spectrum Management system, this system comprises authoring system administration module, cognitive radio system administration module, frequency spectrum data storehouse, interference assessment module and spectrum allocation may module;
Said authoring system administration module is used for and have the authoring system of Signalling exchange passage to carry out Signalling exchange, obtains the distributable idle frequency spectrum information that said authoring system provides through Signalling exchange, deposits this idle frequency spectrum information in the frequency spectrum data storehouse;
Said cognitive radio system administration module is used for carrying out Signalling exchange with cognitive radio system, obtains the detected idle frequency spectrum information of the cognitive radio system that possesses the frequency spectrum detection ability, deposits this idle frequency spectrum information in the frequency spectrum data storehouse; The frequency solicitation message and the frequency of distributing that receive cognitive radio system are notified to cognitive radio system; Carry the frequency needs information of cognitive radio system in the said frequency solicitation message;
Said frequency spectrum data storehouse is used to store idle frequency spectrum information;
Said interference assessment module is used for the idle frequency spectrum information of storing according to said frequency spectrum data storehouse, the interference that when assessing each cognitive radio system and taking each idle frequency spectrum of each authoring system each authoring system is produced;
Said spectrum allocation may module is used for the assessment result according to said interference assessment module, the idle frequency spectrum information in frequency spectrum data storehouse and the frequency needs of cognitive radio system, is the idle frequency spectrum of cognitive radio system assigns authorized system.
A kind of dynamic spectrum management method, this method comprises:
Through carrying out the idle frequency spectrum information that Signalling exchange obtains authoring system with the authoring system that the Signalling exchange passage is arranged;
Through carrying out the detected idle frequency spectrum information of cognitive radio system that Signalling exchange obtains the frequency spectrum detection ability with cognitive radio system;
Receive the frequency solicitation message of cognitive radio system; Carry the frequency needs information of cognitive radio system in this frequency solicitation message; According to the idle frequency spectrum information of obtaining, the interference that when assessing each cognitive radio system and taking each idle frequency spectrum of each authoring system each authoring system is produced;
Frequency needs according to interference assessment result, the idle frequency spectrum information of obtaining and cognitive radio is the idle frequency spectrum of cognitive radio system assigns authorized system.
Visible by technique scheme; The present invention is through carrying out the idle frequency spectrum information that Signalling exchange obtains authoring system with authoring system; Obtain the detected idle frequency spectrum information of this cognitive radio system through carrying out Signalling exchange with the cognitive radio system that the frequency spectrum detection ability is arranged; According to the idle frequency spectrum information of obtaining is the idle frequency spectrum of cognitive radio system assigns authorized system; Realized the spectrum management between a plurality of cognitive radio systems and a plurality of authoring system,, therefore can improve the availability of frequency spectrum because cognitive radio system can take the idle frequency spectrum of authoring system.
In addition; Since among the present invention through carrying out the idle frequency spectrum information that Signalling exchange obtains authoring system with the authoring system that the Signalling exchange passage is arranged; Through carrying out Signalling exchange with cognitive radio system; Carry out frequency spectrum detection by cognitive radio system, and then report testing result, so the present invention can support to obtain idle frequency spectrum information through Signalling exchange with through the frequency spectrum detection dual mode through signaling.
Description of drawings
Fig. 1 is a Dynamic Spectrum Management system construction drawing provided by the invention.
Fig. 2 is the Dynamic Spectrum Management system construction drawing that carries out spectrum allocation may according to the frequency solicitation message.
Fig. 3 is a dynamic spectrum management method flow chart provided by the invention.
Embodiment
Fig. 1 is a Dynamic Spectrum Management system construction drawing provided by the invention.
As shown in Figure 1, this system comprises authoring system administration module 101, cognitive radio system administration module 102, frequency spectrum data storehouse 103, interference assessment module 104 and spectrum allocation may module 105.
Authoring system administration module 101 is used for and have the authoring system of Signalling exchange passage to carry out Signalling exchange, obtains the idle frequency spectrum information of said authoring system through Signalling exchange, deposits this idle frequency spectrum information in frequency spectrum data storehouse 103.
Cognitive radio system administration module 102 is used for carrying out Signalling exchange with cognitive radio system, obtains the detected idle frequency spectrum information of the cognitive radio system that possesses the frequency spectrum detection ability, deposits this idle frequency spectrum information in frequency spectrum data storehouse 103.The frequency solicitation message and the frequency of distributing that receive cognitive radio system are notified to cognitive radio system, carry the frequency needs information of cognitive radio system in the said frequency solicitation message.
Frequency spectrum data storehouse 103 is used to store idle frequency spectrum information.
Spectrum allocation may module 105 is used for the assessment result according to interference assessment module 104, the idle frequency spectrum information in frequency spectrum data storehouse 103 and the frequency needs of cognitive radio system, is the idle frequency spectrum of cognitive radio system assigns authorized system.
Usually, cognitive radio system sends the frequency solicitation message to Dynamic Spectrum Management system shown in Figure 1 earlier, and the Dynamic Spectrum Management system carries out spectrum allocation may according to this frequency solicitation message more then, particularly:
Cognitive radio system administration module 102; Be used to receive the frequency solicitation message of cognitive radio system; Send the inquiry indication to authoring system administration module 101; Send frequency spectrum detection inquiry message to the cognitive radio system that the frequency spectrum detection ability is arranged, obtain and said authoring system administration module between do not have the idle frequency spectrum information of the authoring system of Signalling exchange passage, deposit this idle frequency spectrum information in frequency spectrum data storehouse 103; Send frequency spectrum application indication according to said frequency solicitation message to spectrum allocation may module 105, the idle frequency spectrum information that spectrum allocation may module 105 is distributed is issued said cognitive radio system.
Authoring system administration module 101; Be used for according to said inquiry indication; Send idle frequency spectrum inquiry message to the authoring system that the Signalling exchange passage is arranged, receive the idle frequency spectrum information of authoring system, deposit this idle frequency spectrum information in frequency spectrum data storehouse 103 through the report of idle frequency spectrum offer message.
Spectrum allocation may module 105; Be used for according to said frequency spectrum application indication; From frequency spectrum data storehouse 103, obtain the idle frequency spectrum information of renewal; The interference that when calling 104 pairs of interference assessment modules and sending the cognitive radio system of said frequency solicitation message and take the idle frequency spectrum of each authoring system each authoring system is produced is assessed, and distributes idle frequency spectrum according to assessment result for the cognitive radio system that sends said frequency solicitation message.
Wherein, cognitive radio system can periodically send the frequency solicitation message.
The Dynamic Spectrum Management system carries out spectrum allocation may according to the frequency solicitation message, can adapt to the spectrum requirement of cognitive radio system in real time, improves the flexibility of Dynamic Spectrum Management system.
Fig. 2 is the Dynamic Spectrum Management system construction drawing that carries out spectrum allocation may according to the frequency solicitation message.
As shown in Figure 2; This system comprises authoring system administration module 201, cognitive radio system administration module 202, frequency spectrum data storehouse 203, interference assessment module 204 and spectrum allocation may module 205; Wherein, cognitive radio system administration module 202 comprises first module 2021, second module 2022, three module 2023 and four module 2024.
Three module 2023 is used for when first module 2021 is received the frequency solicitation message, sends the inquiry indication to authoring system administration module 201.
Four module 2024 is used for sending frequency spectrum application indication according to said frequency solicitation message to spectrum allocation may module 204, the idle frequency spectrum information that received spectrum distribution module 204 is distributed, and be transmitted to first module 2021.
Authoring system administration module 201; Be used for according to said inquiry indication; Send idle frequency spectrum inquiry message to the authoring system that the Signalling exchange passage is arranged, receive the idle frequency spectrum information of authoring system, deposit this idle frequency spectrum information in frequency spectrum data storehouse 203 through the report of idle frequency spectrum offer message.
Frequency spectrum data storehouse 203 is used to store idle frequency spectrum information.
Spectrum allocation may module 204; Be used for according to said frequency spectrum application indication; From frequency spectrum data storehouse 203, obtain the idle frequency spectrum information of renewal; The interference that when calling 204 pairs of interference assessment modules and sending the cognitive radio system of said frequency solicitation message and take the idle frequency spectrum of each authoring system each authoring system is produced is assessed, and distributes idle frequency spectrum according to assessment result for the cognitive radio system that sends said frequency solicitation message.
Wherein, After cognitive radio system receives frequency spectrum detection inquiry message; To Dynamic Spectrum Management System Reports frequency spectrum detecting result message; This message can be cognitive radio system in the detected signal power value of each frequency, also can be whether each frequency after judging according to certain thresholding is authorized to the indication that system takies.
Wherein, authoring system administration module 201 comprises the authoring system interface, is used to insert a plurality of authoring systems, carries out Signalling exchange with the authoring system that inserts.
Can define unified authoring system interface and unified cognitive radio system interface in advance; So that a Dynamic Spectrum Management system can insert a plurality of authoring systems and a plurality of cognitive radio system, authoring system or cognitive radio system also can insert a plurality of Dynamic Spectrum Management system.
The frequency needs information of carrying in the said frequency solicitation message can comprise operating frequency range, bandwidth requirement of cognitive radio system etc.; Temporal information comprises the requirement to free time length, for example can estimate that according to business demand the cognitive radio system needs take the duration of frequency spectrum resource continuously, needs the zero-time of use frequency spectrum resource etc.; Spatial information comprises the geographic range requirement that takies frequency spectrum resource.
Correspondingly; Authoring system, can comprise in this idle frequency spectrum offer message: the frequecy characteristic of idle frequency spectrum (for example centre frequency, bandwidth etc.), temporal characteristics (the for example zero-time of free time length, idle periods) and space characteristics (frequency spectrum is in idle condition in which geographic range) when the assignable idle frequency spectrum information of Dynamic Spectrum Management System Reports through the idle frequency spectrum offer message.
Can carry spectrum signature, temporal characteristics and the space characteristics of idle frequency spectrum in the message (being called for short the idle frequency spectrum assignment messages) for cognitive radio system distribution frequency spectrum.Cognitive radio system uses idle frequency spectrum to communicate according to spectrum allocation may message.
Can also carry the precedence information of cognitive radio system in the said frequency solicitation message, so that can be the high professional priority allocation frequency spectrum of priority.Said precedence information can be priority indication, can be and information that the priority indication is corresponding, for example the sign of cognitive radio system etc.
Can also carry the protective capability information of cognitive radio system in the said frequency solicitation message to authoring system.Wherein, said cognitive radio system comprises the frequency spectrum perception ability information and/or the transmission power information of cognitive radio system to the protective capability information of authoring system.Frequency spectrum perception ability wherein comprises information such as granularity and the scope of frequency spectrum perception.
Can also comprise the anti-interference index of authoring system in the said idle frequency spectrum offer message and/or to requirement of the frequency spectrum perception ability of cognitive radio system etc.; So that according to said anti-interference index and/or to the requirement of the frequency spectrum perception ability of cognitive radio system, the idle frequency spectrum testing result of cognitive radio system is handled and/or is that cognitive radio system distributes idle frequency spectrum.For example, if said anti-interference index is not satisfied in the interference that authoring system is produced when cognitive radio system takies the idle frequency spectrum of authoring system, then can not this idle frequency spectrum be distributed to said cognitive radio system; If cognitive radio system does not satisfy the requirement of authoring system to the frequency spectrum perception ability to the protective capability of authoring system, then can not only judge that according to the frequency spectrum detecting result of this cognitive radio system the frequency spectrum of this authoring system takies situation in the spectrum allocation may.
According to the anti-interference index of the idle frequency spectrum information of each authoring system, each authoring system and each cognitive radio system protective capability to authoring system; The interference that 203 pairs of each cognitive radio systems of interference estimation block 103 or interference assessment module utilize each idle frequence to cause for each authoring system is assessed; If the interference that certain cognitive radio system causes surpasses the anti-interference index of authoring system report, just can not give this cognitive radio system this Frequency Distribution.
Except considering the interference of cognitive radio system to authoring system, in order to optimize the communication quality of cognitive radio system, can also further consider the interference of authoring system to cognitive radio system, particularly:
The present invention also provides a kind of dynamic spectrum management method, specifically sees also Fig. 3.
Fig. 3 is a dynamic spectrum management method flow chart provided by the invention.
As shown in Figure 3, this method comprises:
Step 301 receives the frequency solicitation message of cognitive radio system, carries the frequency needs information of cognitive radio system in this frequency solicitation message.
Step 302 is through carrying out the idle frequency spectrum information that Signalling exchange obtains authoring system with the authoring system that the Signalling exchange passage is arranged.
Step 303 is through carrying out the detected idle frequency spectrum information of cognitive radio system that Signalling exchange obtains the frequency spectrum detection ability with cognitive radio system.
Wherein, the order of step 302 and step 303 is adjustable, also can carry out synchronously.
Step 305 according to the frequency needs information of interference assessment result, the idle frequency spectrum information of obtaining and cognitive radio system, is the idle frequency spectrum of cognitive radio system assigns authorized system.
The spectrum requirement information of carrying in the said frequency solicitation message comprises the information such as frequency information, temporal information and spatial information of demand frequency spectrum.
Can also carry in the said frequency solicitation message cognitive radio system precedence information and/or with cognitive radio system to the protective capability information of authoring system, so that be the idle frequency spectrum of cognitive radio system assigns authorized system to the protective capability information of authoring system according to the priority of cognitive radio system and/or cognitive radio system.Wherein, said cognitive radio system comprises the frequency spectrum perception ability information and/or the transmission power information of cognitive radio system to the protective capability information of authoring system.
This method can also comprise: when assessing each cognitive radio system and taking each idle frequency spectrum of each authoring system, and the interference that authoring system produces cognitive radio system.
Then correspondingly, saidly comprise for the idle frequency spectrum of cognitive radio system assigns authorized system:
When taking each idle frequency spectrum of each authoring system according to each cognitive radio system, authoring system is the idle frequency spectrum of cognitive radio system assigns authorized system to interference, the cognitive radio system of cognitive radio system to the frequency needs information of interference, idle frequency spectrum information and the cognitive radio system of authoring system.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope that the present invention protects.
Claims (11)
1. a Dynamic Spectrum Management system is characterized in that, this system comprises authoring system administration module, cognitive radio system administration module, frequency spectrum data storehouse, interference assessment module and spectrum allocation may module;
Said authoring system administration module is used for and have the authoring system of Signalling exchange passage to carry out Signalling exchange, obtains the idle frequency spectrum information of said authoring system through Signalling exchange, deposits this idle frequency spectrum information in the frequency spectrum data storehouse;
Said cognitive radio system administration module; Be used for carrying out Signalling exchange with cognitive radio system; Obtain the detected idle frequency spectrum information of the cognitive radio system that possesses the frequency spectrum detection ability; Deposit this idle frequency spectrum information in the frequency spectrum data storehouse, the frequency solicitation message and the frequency of distributing that receive cognitive radio system are notified to cognitive radio system, carry the frequency needs information of cognitive radio system in the said frequency solicitation message;
Said frequency spectrum data storehouse is used to store idle frequency spectrum information;
Said interference assessment module is used for the idle frequency spectrum information of storing according to said frequency spectrum data storehouse, the interference that when assessing each cognitive radio system and taking each idle frequency spectrum of each authoring system each authoring system is produced;
Said spectrum allocation may module is used for the assessment result according to said interference assessment module, the idle frequency spectrum information in frequency spectrum data storehouse and the frequency needs of cognitive radio system, is the idle frequency spectrum of cognitive radio system assigns authorized system.
2. system according to claim 1 is characterized in that,
Said cognitive radio system administration module; Be used to receive the frequency solicitation message of cognitive radio system; Send the inquiry indication to said authoring system administration module; Send frequency spectrum detection inquiry message to the cognitive radio system that the frequency spectrum detection ability is arranged, obtain and said authoring system administration module between do not have the idle frequency spectrum information of the authoring system of Signalling exchange passage, deposit this idle frequency spectrum information in the frequency spectrum data storehouse; Send frequency spectrum application indication according to said frequency solicitation message to said spectrum allocation may module, the idle frequency spectrum information of said spectrum allocation may module assignment is issued said cognitive radio system;
Said authoring system administration module; Be used for according to said inquiry indication; Send idle frequency spectrum inquiry message to the authoring system that the Signalling exchange passage is arranged, receive the idle frequency spectrum information of authoring system, deposit this idle frequency spectrum information in the frequency spectrum data storehouse through the report of idle frequency spectrum offer message;
Said spectrum allocation may module; Be used for according to said frequency spectrum application indication; From the frequency spectrum data storehouse, obtain the idle frequency spectrum information of renewal; The interference that when calling said interference assessment module the cognitive radio system that sends said frequency solicitation message being taken the idle frequency spectrum of each authoring system each authoring system is produced is assessed, and distributes idle frequency spectrum according to assessment result for the cognitive radio system that sends said frequency solicitation message.
3. system according to claim 2 is characterized in that, said cognitive radio system administration module comprises first module, second module, three module and four module;
Said first module; Be used to receive the frequency solicitation message of cognitive radio system; Send frequency spectrum detection inquiry message to the cognitive radio system that the frequency spectrum detection ability is arranged; Obtain and said authoring system administration module between do not have the idle frequency spectrum information of the authoring system of Signalling exchange passage, the idle frequency spectrum information of said spectrum allocation may module assignment is issued said cognitive radio system;
Said second module is used for depositing this idle frequency spectrum information in the frequency spectrum data storehouse;
Said three module is used for when said first module is received the frequency solicitation message, sends the inquiry indication to said authoring system administration module;
Said four module is used for sending frequency spectrum application indication according to said frequency solicitation message to said spectrum allocation may module, receives the idle frequency spectrum information of said spectrum allocation may module assignment, and is transmitted to said first module;
The authoring system administration module; Be used for according to said inquiry indication; Send idle frequency spectrum inquiry message to the authoring system that the Signalling exchange passage is arranged, receive the idle frequency spectrum information of authoring system, deposit this idle frequency spectrum information in the frequency spectrum data storehouse through the report of idle frequency spectrum offer message;
The spectrum allocation may module; Be used for according to said frequency spectrum application indication; From the frequency spectrum data storehouse, obtain the idle frequency spectrum information of renewal; The interference that when calling the interference assessment module cognitive radio system that sends said frequency solicitation message being taken the idle frequency spectrum of each authoring system each authoring system is produced is assessed, and distributes idle frequency spectrum according to assessment result for the cognitive radio system that sends said frequency solicitation message.
4. according to claim 1 or 2 or 3 described systems, it is characterized in that,
Said authoring system administration module comprises the authoring system interface, is used to insert a plurality of authoring systems, carries out Signalling exchange with the authoring system that inserts;
Said first module is used to insert a plurality of cognitive radio systems, carries out Signalling exchange with the cognitive radio system that inserts.
5. system according to claim 2 is characterized in that,
Also carry precedence information and/or the cognitive radio system of cognitive radio system protective capability information in the said frequency solicitation message to authoring system.
6. system according to claim 5 is characterized in that,
Said cognitive radio system comprises the frequency spectrum perception ability information and/or the transmission power information of cognitive radio system to the protective capability information of authoring system.
7. according to claim 1 or 2 or 3 described systems, it is characterized in that,
Said interference assessment module, when comprising that also being used to assess each cognitive radio system takies each idle frequency spectrum of each authoring system, the interference that authoring system produces cognitive radio system.
8. a dynamic spectrum management method is characterized in that, this method comprises:
Receive the frequency solicitation message of cognitive radio system, carry the frequency needs information of cognitive radio system in this frequency solicitation message;
Through carrying out the idle frequency spectrum information that Signalling exchange obtains authoring system, through carrying out the detected idle frequency spectrum information of cognitive radio system that Signalling exchange obtains the frequency spectrum detection ability with cognitive radio system with the authoring system that the Signalling exchange passage is arranged;
According to the idle frequency spectrum information of obtaining, the interference that when assessing each cognitive radio system and taking each idle frequency spectrum of each authoring system each authoring system is produced;
Frequency needs information according to interference assessment result, the idle frequency spectrum information of obtaining and cognitive radio system is the idle frequency spectrum of cognitive radio system assigns authorized system.
9. method according to claim 8 is characterized in that,
Also carry precedence information and/or the cognitive radio system of cognitive radio system protective capability information in the said frequency solicitation message to authoring system.
10. method according to claim 9 is characterized in that,
Said cognitive radio system comprises the frequency spectrum perception ability information and/or the transmission power information of cognitive radio system to the protective capability information of authoring system.
11. to the described method of 10 arbitrary claims, it is characterized in that this method also comprises according to Claim 8: when assessing each cognitive radio system and taking each idle frequency spectrum of each authoring system, the interference that authoring system produces cognitive radio system;
Saidly comprise for the idle frequency spectrum of cognitive radio system assigns authorized system:
When taking each idle frequency spectrum of each authoring system according to each cognitive radio system; Authoring system is the idle frequency spectrum of cognitive radio system assigns authorized system to the interference of cognitive radio system, the cognitive radio system frequency needs information to the interference of authoring system, the idle frequency spectrum information of obtaining and cognitive radio system.
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