CN102595420B - Dynamic spectrum management system and method - Google Patents
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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, certain frequency band division is given certain wireless traffic by employing single-use, the fixed frequency spectrum method of salary distribution, then this dividing frequency band is become to some frequency ranges, licenses to respectively different wireless traffic operators and use.In 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 if 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 has a kind of cognitive radio system (CR), take the information of frequency spectrum by the system of obtaining the authorization, under the prerequisite that does not affect authoring system communication, select idle frequence to communicate, in the time that authoring system is resumed frequency, CR wants to return in time frequency.
Because cognitive radio system can have multiple, authoring system also can have multiple, in order to make frequency spectrum resource energy by efficient, fair, utilization reliably, allow a cognitive radio system can use neatly the idle frequency range of multiple authoring systems, and the idle frequency spectrum of an authoring system can be used by multiple cognitive radio systems, need to provide a kind of system, for carry out spectrum management between multiple cognitive radio systems and multiple authoring system.
Summary of the invention
In view of this, the invention provides a kind of Dynamic Spectrum Management system and method, for carry out spectrum management between multiple cognitive radio systems and multiple authoring system, to improve the availability of frequency spectrum.
Technical scheme of the present invention is specifically 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;
Described authoring system administration module, for carrying out Signalling exchange with the authoring system that has Signalling exchange passage, obtains by Signalling exchange the distributable idle frequency spectrum information that described authoring system provides, and deposits this idle frequency spectrum information in frequency spectrum data storehouse;
Described cognitive radio system administration module, the idle frequency spectrum information detecting for carrying out Signalling exchange with cognitive radio system, obtain possessing the cognitive radio system of frequency spectrum detection ability, deposits this idle frequency spectrum information in frequency spectrum data storehouse; Receive the frequency solicitation message of cognitive radio system and the frequency of distributing is notified to cognitive radio system; In described frequency solicitation message, carry the frequency needs information of cognitive radio system;
Described frequency spectrum data storehouse, for storing idle frequency spectrum information;
Described interference assessment module, for the idle frequency spectrum information of storing according to described frequency spectrum data storehouse, assesses interference when each cognitive radio system takies each idle frequency spectrum of each authoring system, each authoring system being produced;
Described spectrum allocation may module, for according to the idle frequency spectrum information in the assessment result of described interference assessment module, 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, the method comprises:
By carrying out Signalling exchange and obtain the idle frequency spectrum information of authoring system with the authoring system that has Signalling exchange passage;
Obtain by carrying out Signalling exchange with cognitive radio system the idle frequency spectrum information that the cognitive radio system of frequency spectrum detection ability detects;
Receive the frequency solicitation message of cognitive radio system, in this frequency solicitation message, carry the frequency needs information of cognitive radio system, according to the idle frequency spectrum information of obtaining, assess interference when each cognitive radio system takies each idle frequency spectrum of each authoring system, each authoring system being produced;
Be the idle frequency spectrum of cognitive radio system assigns authorized system according to the frequency needs of interference assessment result, the idle frequency spectrum information of obtaining and cognitive radio.
As seen from the above technical solution, the present invention is by carrying out Signalling exchange and obtain the idle frequency spectrum information of authoring system with authoring system, obtain by carrying out Signalling exchange with the cognitive radio system that has frequency spectrum detection ability the idle frequency spectrum information that this cognitive radio system detects, be the idle frequency spectrum of cognitive radio system assigns authorized system according to the idle frequency spectrum information of obtaining, realize the spectrum management between multiple cognitive radio systems and multiple authoring system, because cognitive radio system can take the idle frequency spectrum of authoring system, therefore can improve the availability of frequency spectrum.
In addition, due in the present invention by carrying out Signalling exchange and obtain the idle frequency spectrum information of authoring system with the authoring system that has Signalling exchange passage, by carrying out Signalling exchange with cognitive radio system, carry out frequency spectrum detection by cognitive radio system, and then report testing result by signaling, therefore the present invention can support to obtain idle frequency spectrum information by Signalling exchange with by two kinds of modes of frequency spectrum detection.
Brief description of the drawings
Fig. 1 is 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 frequency solicitation message.
Fig. 3 is dynamic spectrum management method flow chart provided by the invention.
Embodiment
Fig. 1 is 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, for carrying out Signalling exchange with the authoring system that has Signalling exchange passage, obtains the idle frequency spectrum information of described authoring system by Signalling exchange, deposit this idle frequency spectrum information in frequency spectrum data storehouse 103.
Cognitive radio system administration module 102, the idle frequency spectrum information detecting for carrying out Signalling exchange with cognitive radio system, obtain possessing the cognitive radio system of frequency spectrum detection ability, deposits this idle frequency spectrum information in frequency spectrum data storehouse 103.Receive the frequency solicitation message of cognitive radio system and the frequency of distributing is notified to cognitive radio system, in described frequency solicitation message, carrying the frequency needs information of cognitive radio system.
Frequency spectrum data storehouse 103, for storing idle frequency spectrum information.
Interference assessment module 104, for according to the idle frequency spectrum information of frequency spectrum data storehouse 103 storage, assesses interference when each cognitive radio system takies each idle frequency spectrum of each authoring system, each authoring system being produced.
Spectrum allocation may module 105, for according to the idle frequency spectrum information in the assessment result of interference assessment module 104, 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 is first to the Dynamic Spectrum Management system transmission frequency solicitation message shown in Fig. 1, and then Dynamic Spectrum Management system is carried out spectrum allocation may according to this frequency solicitation message again, particularly:
Cognitive radio system administration module 102, for receiving the frequency solicitation message of cognitive radio system, send inquiry instruction to authoring system administration module 101, send frequency spectrum detection inquiry message to the cognitive radio system that has frequency spectrum detection ability, obtain the idle frequency spectrum information that there is no the authoring system of Signalling exchange passage between described authoring system administration module, deposit this idle frequency spectrum information in frequency spectrum data storehouse 103; Send frequency spectrum application instruction according to described frequency solicitation message to spectrum allocation may module 105, the idle frequency spectrum information that spectrum allocation may module 105 is distributed is issued described cognitive radio system.
Authoring system administration module 101, for indicating according to described inquiry, send idle frequency spectrum inquiry message to the authoring system that has Signalling exchange passage, receive the idle frequency spectrum information that authoring system is reported by idle frequency spectrum offer message, deposit this idle frequency spectrum information in frequency spectrum data storehouse 103.
Spectrum allocation may module 105, for indicating according to described frequency spectrum application, from frequency spectrum data storehouse 103, obtain the idle frequency spectrum information of renewal, calling interference assessment module 104 and assess sending the interference when cognitive radio system of described frequency solicitation message takies the idle frequency spectrum of each authoring system, each authoring system being produced, is that the cognitive radio system that sends described frequency solicitation message distributes idle frequency spectrum according to assessment result.
Wherein, periodically transmission frequency solicitation message of cognitive radio system.
Dynamic Spectrum Management system is carried out spectrum allocation may according to frequency solicitation message, can adapt in real time the spectrum requirement of cognitive radio system, 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 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 the first module 2021, the second module 2022, the 3rd module 2023 and four module 2024.
The first module 2021, for receiving the frequency solicitation message of cognitive radio system, send frequency spectrum detection inquiry message to the cognitive radio system that has frequency spectrum detection ability, obtain the idle frequency spectrum information of the authoring system that there is no Signalling exchange passage between authoring system administration module 201, the idle frequency spectrum information that spectrum allocation may module 205 is distributed is issued described cognitive radio system.
The second module 2022, for depositing this idle frequency spectrum information in frequency spectrum data storehouse 203.
The 3rd module 2023, in the time that the first module 2021 is received frequency solicitation message, sends inquiry instruction to authoring system administration module 201.
Four module 2024, for sending frequency spectrum application instruction according to described 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 the first module 2021.
Authoring system administration module 201, for indicating according to described inquiry, send idle frequency spectrum inquiry message to the authoring system that has Signalling exchange passage, receive the idle frequency spectrum information that authoring system is reported by idle frequency spectrum offer message, deposit this idle frequency spectrum information in frequency spectrum data storehouse 203.
Frequency spectrum data storehouse 203, for storing idle frequency spectrum information.
Spectrum allocation may module 204, for indicating according to described frequency spectrum application, from frequency spectrum data storehouse 203, obtain the idle frequency spectrum information of renewal, calling interference assessment module 204 and assess sending the interference when cognitive radio system of described frequency solicitation message takies the idle frequency spectrum of each authoring system, each authoring system being produced, is that the cognitive radio system that sends described frequency solicitation message distributes idle frequency spectrum according to assessment result.
Wherein, cognitive radio system receives after frequency spectrum detection inquiry message, to Dynamic Spectrum Management System Reports frequency spectrum detecting result message, this message can be the signal power value that cognitive radio system detects at each frequency, can be also the instruction taking according to the whether authorized system of the each frequency after certain thresholding judgement.
Wherein, authoring system administration module 201 comprises authoring system interface, for accessing multiple authoring systems, carries out Signalling exchange with the authoring system of access.
The first module 2021, for accessing multiple cognitive radio systems, carries out Signalling exchange with the cognitive radio system of access.In this first module 2021, comprise cognitive radio system interface.
Can pre-define unified authoring system interface and unified cognitive radio system interface, to make a Dynamic Spectrum Management system can access multiple authoring systems and multiple cognitive radio system, an authoring system or a cognitive radio system also can access multiple Dynamic Spectrum Management systems.
The frequency needs information of carrying in described frequency solicitation message can comprise operating frequency range, the bandwidth requirement etc. of cognitive radio system; Temporal information comprises the requirement to free time length, for example, can estimate that according to business demand cognitive radio system need to take the duration of frequency spectrum resource continuously, need to use the initial time of 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 during to the assignable idle frequency spectrum information of Dynamic Spectrum Management System Reports by idle frequency spectrum offer message: frequecy characteristic (such as centre frequency, bandwidth etc.), temporal characteristics (for example initial time of free time length, idle periods) and the space characteristics of idle frequency spectrum (frequency spectrum in which geographic range in idle condition).
In message (being called for short idle frequency spectrum assignment messages) for cognitive radio system distribution frequency spectrum, can carry spectrum signature, temporal characteristics and the space characteristics of idle frequency spectrum.Cognitive radio system uses idle frequency spectrum to communicate according to spectrum allocation may message.
In described frequency solicitation message, can also carry the precedence information of cognitive radio system, to can be the business priority allocation frequency spectrum that priority is high.Described precedence information can be priority instruction, can be to indicate corresponding information with priority, the mark of such as cognitive radio system etc.
In described frequency solicitation message, can also carry the protective capability information of cognitive radio system to authoring system.Wherein, described cognitive radio system comprises 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 the information such as granularity and scope of frequency spectrum perception.
In described idle frequency spectrum offer message, can also comprise the requirement of the anti-interference index of authoring system and/or the frequency spectrum perception ability to cognitive radio system etc., so that according to the requirement of described anti-interference index and/or the frequency spectrum perception ability to cognitive radio system, to the idle frequency spectrum testing result of cognitive radio system process and/or be cognitive radio system distribute idle frequency spectrum.For example, if interference when cognitive radio system takies the idle frequency spectrum of authoring system, authoring system being produced does not meet described anti-interference index, this idle frequency spectrum can not be distributed to described cognitive radio system; If cognitive radio system does not meet the requirement of authoring system to frequency spectrum perception ability to the protective capability of authoring system, in spectrum allocation may, 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.
The protective capability to authoring system according to the anti-interference index of the idle frequency spectrum information of each authoring system, each authoring system and each cognitive radio system; the interference that interference estimation block 103 or interference assessment module 203 utilize each idle frequence to cause to each authoring system to each cognitive radio system is assessed; if the interference that certain cognitive radio system causes exceedes the anti-interference index of authoring system report, just this frequency can not be distributed to this cognitive radio system.
Except considering cognition radio system is to the interference of 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:
Interference assessment module 103 or interference assessment module 203, also comprise a module, while taking each idle frequency spectrum of each authoring system for assessment of each cognitive radio system, and the interference that authoring system produces cognitive radio system.
The present invention also provides a kind of dynamic spectrum management method, specifically refers to Fig. 3.
Fig. 3 is dynamic spectrum management method flow chart provided by the invention.
As shown in Figure 3, the 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, by carrying out Signalling exchange and obtain the idle frequency spectrum information of authoring system with the authoring system that has Signalling exchange passage.
Step 303, obtains by carrying out Signalling exchange with cognitive radio system the idle frequency spectrum information that the cognitive radio system of frequency spectrum detection ability detects.
Wherein, the order of step 302 and step 303 is adjustable, also can synchronously carry out.
Step 304, according to the idle frequency spectrum information of obtaining, assesses interference when each cognitive radio system takies each idle frequency spectrum of each authoring system, each authoring system being produced.
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 described frequency solicitation message comprises the information such as frequency information, temporal information and the spatial information of demand frequency spectrum.
In described frequency solicitation message, can also carry cognitive radio system precedence information and/or and the protective capability information of cognitive radio system to authoring system, to be the idle frequency spectrum of cognitive radio system assigns authorized system according to the priority of cognitive radio system and/or cognitive radio system to the protective capability information of authoring system.Wherein, described cognitive radio system comprises frequency spectrum perception ability information and/or the transmission power information of cognitive radio system to the protective capability information of authoring system.
The 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.
Correspondingly, the described idle frequency spectrum for cognitive radio system assigns authorized system comprises:
While taking each idle frequency spectrum of each authoring system according to each cognitive radio system, the interference of authoring system to cognitive radio system, the frequency needs information of interference, idle frequency spectrum information and the cognitive radio system of cognitive radio system to authoring system are the idle frequency spectrum of cognitive radio system assigns authorized system.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of making, be equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.
Claims (9)
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;
Described authoring system administration module, for carrying out Signalling exchange with the authoring system that has Signalling exchange passage, obtains the idle frequency spectrum information of described authoring system by Signalling exchange, deposit this idle frequency spectrum information in frequency spectrum data storehouse;
Described cognitive radio system administration module, for carrying out Signalling exchange with cognitive radio system, obtain and possess the idle frequency spectrum information that the cognitive radio system of frequency spectrum detection ability detects, deposit this idle frequency spectrum information in frequency spectrum data storehouse, receive the frequency solicitation message of cognitive radio system and the frequency of distributing is notified to cognitive radio system, in described frequency solicitation message, carrying the frequency needs information of cognitive radio system;
Described frequency spectrum data storehouse, for storing idle frequency spectrum information;
Described interference assessment module, for the idle frequency spectrum information of storing according to described frequency spectrum data storehouse, assesses interference when each cognitive radio system takies each idle frequency spectrum of each authoring system, each authoring system being produced;
Described spectrum allocation may module, for according to the idle frequency spectrum information in the assessment result of described interference assessment module, 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,
Described cognitive radio system administration module, for receiving the frequency solicitation message of cognitive radio system, send inquiry instruction to described authoring system administration module, send frequency spectrum detection inquiry message to the cognitive radio system that has frequency spectrum detection ability, obtain the idle frequency spectrum information that there is no the authoring system of Signalling exchange passage between described authoring system administration module, deposit this idle frequency spectrum information in frequency spectrum data storehouse; Send frequency spectrum application instruction according to described frequency solicitation message to described spectrum allocation may module, the idle frequency spectrum information of described spectrum allocation may module assignment is issued to described cognitive radio system;
Described authoring system administration module, for indicating according to described inquiry, send idle frequency spectrum inquiry message to the authoring system that has Signalling exchange passage, receive the idle frequency spectrum information that authoring system is reported by idle frequency spectrum offer message, deposit this idle frequency spectrum information in frequency spectrum data storehouse;
Described spectrum allocation may module, for indicating according to described frequency spectrum application, from frequency spectrum data storehouse, obtain the idle frequency spectrum information of renewal, calling described interference assessment module and assess sending the interference when cognitive radio system of described frequency solicitation message takies the idle frequency spectrum of each authoring system, each authoring system being produced, is that the cognitive radio system that sends described frequency solicitation message distributes idle frequency spectrum according to assessment result.
3. system according to claim 2, is characterized in that, described cognitive radio system administration module comprises the first module, the second module, the 3rd module and four module;
Described the first module, for receiving the frequency solicitation message of cognitive radio system, send frequency spectrum detection inquiry message to the cognitive radio system that has frequency spectrum detection ability, obtain the idle frequency spectrum information that there is no the authoring system of Signalling exchange passage between described authoring system administration module, the idle frequency spectrum information of described spectrum allocation may module assignment is issued to described cognitive radio system;
Described the second module, for depositing this idle frequency spectrum information in frequency spectrum data storehouse;
Described the 3rd module, in the time that described the first module is received frequency solicitation message, sends inquiry instruction to described authoring system administration module;
Described four module, for sending frequency spectrum application instruction according to described frequency solicitation message to described spectrum allocation may module, receives the idle frequency spectrum information of described spectrum allocation may module assignment, and is transmitted to described the first module;
Authoring system administration module, for indicating according to described inquiry, send idle frequency spectrum inquiry message to the authoring system that has Signalling exchange passage, receive the idle frequency spectrum information that authoring system is reported by idle frequency spectrum offer message, deposit this idle frequency spectrum information in frequency spectrum data storehouse;
Spectrum allocation may module, for indicating according to described frequency spectrum application, from frequency spectrum data storehouse, obtain the idle frequency spectrum information of renewal, calling interference assessment module and assess sending the interference when cognitive radio system of described frequency solicitation message takies the idle frequency spectrum of each authoring system, each authoring system being produced, is that the cognitive radio system that sends described frequency solicitation message distributes idle frequency spectrum according to assessment result.
4. system according to claim 3, is characterized in that,
Described authoring system administration module comprises authoring system interface, for accessing multiple authoring systems, carries out Signalling exchange with the authoring system of access;
Described the first module, for accessing multiple cognitive radio systems, carries out Signalling exchange with the cognitive radio system of access.
5. system according to claim 2, is characterized in that,
In described frequency solicitation message, also carry precedence information and/or the protective capability information of cognitive radio system to authoring system of cognitive radio system;
Wherein, described cognitive radio system comprises frequency spectrum perception ability information and/or the transmission power information of cognitive radio system to the protective capability information of authoring system.
6. according to the system described in claim 1 or 2 or 3, it is characterized in that,
Described interference assessment module, also comprises while taking each idle frequency spectrum of each authoring system for assessment of each cognitive radio system, the interference that authoring system produces cognitive radio system.
7. a dynamic spectrum management method, is characterized in that, the method comprises:
Receive the frequency solicitation message of cognitive radio system, in this frequency solicitation message, carry the frequency needs information of cognitive radio system;
By carrying out Signalling exchange and obtain the idle frequency spectrum information of authoring system with the authoring system that has Signalling exchange passage, obtain by carrying out Signalling exchange with cognitive radio system the idle frequency spectrum information that the cognitive radio system of frequency spectrum detection ability detects;
According to the idle frequency spectrum information of obtaining, assess interference when each cognitive radio system takies each idle frequency spectrum of each authoring system, each authoring system being produced;
Be the idle frequency spectrum of cognitive radio system assigns authorized system according to the frequency needs information of interference assessment result, the idle frequency spectrum information of obtaining and cognitive radio system.
8. method according to claim 7, is characterized in that,
In described frequency solicitation message, also carry precedence information and/or the protective capability information of cognitive radio system to authoring system of cognitive radio system;
Wherein, described cognitive radio system comprises frequency spectrum perception ability information and/or the transmission power information of cognitive radio system to the protective capability information of authoring system.
9. according to the method described in the arbitrary claim of claim 7 to 8, it is characterized in that, the method also comprises: 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;
The described idle frequency spectrum for cognitive radio system assigns authorized system comprises:
While taking each idle frequency spectrum of each authoring system according to each cognitive radio system, the interference of authoring system to cognitive radio system, the frequency needs information of interference, the idle frequency spectrum information obtained and the cognitive radio system of cognitive radio system to authoring system are the idle frequency spectrum of cognitive radio system assigns authorized system.
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| CN104009809B (en) * | 2013-02-27 | 2016-12-28 | 电信科学技术研究院 | A kind of cognitive radio system subframe method of adjustment and equipment |
| CN104105141B (en) | 2013-04-02 | 2020-03-17 | 索尼公司 | Radio resource management apparatus, method and system |
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| CN103596186B (en) * | 2013-11-29 | 2017-01-04 | 苏州大学 | Bootstrap technique in the band of the cognitive radio networks of database-driven |
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| CN103780324B (en) * | 2014-03-04 | 2016-08-17 | 南通大学 | Dynamic spectrum access method |
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| CN104363596A (en) * | 2014-11-20 | 2015-02-18 | 中国人民解放军总参谋部第六十三研究所 | Dynamic spectrum management semi-physical simulation experiment system and method based on USRP |
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