CN104105098B - user access control method and device - Google Patents
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Abstract
The present invention provides a kind of user access control method and device, wherein, this method includes：The channel transmission quality for the authorized user that the resource of frequency range is taken by least one cognitive user is obtained, and first network parameter is obtained from network management system, first network parameter includes：Transmission gain corresponding with each cognitive user and the channel disturbance gain to authorized user；If judging to know that channel transmission quality is unsatisfactory for the transmission standard of authorized user according to default control strategy, Access Control is carried out at least one cognitive user according to first network parameter, until channel transmission quality meets transmission standard.By user access control method provided by the invention and device, interference of the cognitive user to authorized user is effectively prevented from, ensures the minimum transmission performance requirements of authorized user, while the transmission performance of cognition wireless network can be maximized.
Description
Technical field
The present embodiments relate to communication technical field, more particularly to a kind of user access control method and device.
Background technology
It is following wireless with the fast development of future wireless network business demand and the quick increase of wireless network user
The increasing frequency spectrum resource of demand is met business demand by network, on the other hand, due to currently employed static frequency spectrum point
The frequency spectrum resource that will cause to use with strategy becomes more and more limited, relatively low using the utilization rate of wireless frequency spectrum,
So as to cause waste to a certain extent.Therefore, how to improve frequency spectrum resource service efficiency be currently needed for it is urgently to be resolved hurrily
Major issue, receive the extensive concern of industry.
Cognitive radio technology, by taking the dynamic frequency spectrum method of salary distribution, it is allowed to which unlicensed networks user recognizes and used
Family perceives the frequency spectrum resource for authorizing network, finds frequency spectrum cavity-pocket, uses to chance the idle frequency spectrum resource of authorized user, Ke Yiti
High spectrum utilization ratio, alleviate the nervous contradiction of the supply and demand of frequency spectrum resource, so as to receive the widely studied of industry.
But because the requirement cognitive user of cognitive radio technology can not during using mandate network spectrum
Authorized user is interfered, therefore, how to design effective user access control be not only related to cognitive user can be efficient
Ground is using frequency spectrum resource and to be also relate to authorized user unaffected, therefore, needs a kind of control method of user's access badly.
The content of the invention
For the drawbacks described above of prior art, the embodiment of the present invention provides a kind of user access control method and device.
One aspect of the present invention provides a kind of user access control method, including：
The channel transmission quality for the authorized user that the resource of frequency range is taken by least one cognitive user is obtained, and from webmaster
System obtains first network parameter, and the first network parameter includes：Transmission corresponding with each cognitive user increases
Benefit and the channel disturbance gain to the authorized user；
If judged to know that the channel transmission quality is unsatisfactory for the channel of the authorized user according to default control strategy
Transmission standard, then Access Control is carried out at least one cognitive user according to the first network parameter, until the letter
Road transmission quality meets the transmission standard.
Another aspect of the present invention provides a kind of user access control device, including：
Acquisition module, for obtaining the transmission matter for the authorized user that the resource of frequency range is taken by least one cognitive user
Amount, and first network parameter is obtained from network management system, the first network parameter includes：It is corresponding with each cognitive user
Transmission gain and channel disturbance gain to the authorized user；
Control module, if for being judged to know that the channel transmission quality is awarded described in being unsatisfactory for according to default control strategy
The transmission standard of user is weighed, then access control is carried out at least one cognitive user according to the first network parameter
System, until the channel transmission quality meets the transmission standard.
User access control method and device provided in an embodiment of the present invention, by the acquisition of user's access control apparatus and extremely
A few cognitive user shares the channel transmission quality of the authorized user of itself resource of frequency range, and first network parameter, described
First network parameter includes：Transmission gain corresponding with each cognitive user and the channel disturbance gain to authorized user,
If judged to know that channel transmission quality does not meet the transmission standard of authorized user, basis according to default control strategy
First network parameter carries out Access Control to cognitive user, until channel transmission quality meets standard, so as to be effectively prevented from recognizing
Know interference of the user to authorized user, ensure the minimum transmission performance requirements of authorized user, while cognition wireless can be maximized
The transmission performance of network.
Brief description of the drawings
Fig. 1 is the flow chart of a user access control method provided in an embodiment of the present invention；
Fig. 2 is the flow chart of another user access control method provided in an embodiment of the present invention；
Fig. 3 is the structural representation of a user access control device provided in an embodiment of the present invention.
Embodiment
Fig. 1 is the flow chart of a user access control method provided in an embodiment of the present invention, as shown in figure 1, this method
Including：
Step 100, the channel transmission quality for the authorized user that the resource of frequency range is taken by least one cognitive user is obtained, with
And first network parameter is obtained from network management system, the first network parameter includes：It is corresponding with each cognitive user to believe
Road transmission gain and the channel disturbance gain to the authorized user；
Wireless network is made up of mandate network with cognition wireless network, wherein, net definitions are authorized to possess in certain frequency range
Frequency spectrum uses the wireless network of licence plate（Such as, 2G networks, 3G network etc.）, cognition wireless network is defined as those in certain frequency range not
Licence plate is used with frequency spectrum, but is available with cognitive radio technology and perceives the idle frequency spectrum resource for authorizing network and use this
The wireless network of a little idle frequency spectrums.Network is authorized to transmit information to authorized user with constant power, and authorized user has minimum
Quality of service guarantee, cognition wireless network can authorize the frequency spectrum use state of network by perceiving, and use mandate network
The idle resource of frequency range.And when authorizing network to need to reuse the frequency spectrum resource taken by cognition network, it is necessary to making
Access Control is carried out to ensure the transmission performance of authorized user with the cognitive user of network spectrum resource is authorized.Specifically, pass through
User access control device is set to be controlled with the cognitive user to insertion authority network in equipment in the wireless network, its
In, the equipment in wireless network includes base station, radio network controller etc., and those skilled in the art can be according to practical application need
Selected, the present embodiment is not restricted to this.It is worth noting that, the authorized user in the embodiment of the present invention refers to awarding
Weigh by registration in network, and be authorized to those users of network service, due to multiple authorized users be present in network is authorized,
Therefore, concrete processing procedure of the user access control device to an authorized user is described in detail in the present embodiment, and others authorize
User's processing procedure is similar, and concrete processing procedure is as follows：First authorize network using network data base information acquisition those not
The frequency range that authorized user uses, then these frequency ranges are measured, if only additive Gaussian white noise in the frequency range of measurement
Sound, then it is still not used by cognitive user the free time to illustrate the frequency range, if on the contrary have interference noise in the frequency range of measurement, is said
These bright frequency ranges are taken by cognitive user.Then these discriminative informations are fed back into user access control device.User accesses control
Device processed obtain by least one cognitive user take the resource of frequency range authorized user channel transmission quality, it is necessary to explanation
It is that the form of expression of channel transmission quality is a lot, specifically includes：In signal to noise ratio, bit error rate, the subframe bit error rate and number of retransmissions
At least one parameter, can be selected according to reality using needs.Then user access control device is from wireless network
Network management system in obtain first network parameter, the first network parameter specifically includes：With the cognition of each occupancy resource of frequency range
Letter of the cognitive user of transmission gain corresponding to user and each occupancy resource of frequency range to the authorized user in the frequency range
Road obstacle gain.The specific acquisition modes of first network parameter are can to increase a common control unit in network management system, should
Common control unit, and can be with using channel estimation method etc. by monitoring measurement with authorizing network and cognition network to be communicated
Obstacle gain of the transmission gain of cognitive user with cognitive user to authorized user is obtained, then by the network parameter of acquisition
Feed back to user access control device.
Step 101, if being judged to know that the channel transmission quality is unsatisfactory for described authorize and used according to default control strategy
The transmission standard at family, then Access Control is carried out at least one cognitive user according to the first network parameter, directly
Meet the transmission standard to the channel transmission quality.
User access control device judges after the channel transmission quality of authorized user is obtained according to default control strategy
Whether the channel transmission quality of authorized user meets standard.Specifically, the transmission matter represented with different channels configured transmission
The corresponding control strategy of amount is different, if for example, channel transmission quality is represented with signal to noise ratio, corresponding control strategy
For：If signal to noise ratio is less than default minimum signal to noise ratio, the lowest channel transmission standard of authorized user is unsatisfactory for, if signal to noise ratio is big
In the lowest channel transmission standard for equal to minimum signal to noise ratio, then meeting authorized user；If channel transmission quality bit error rate table
Show, then corresponding control strategy is：If bit error rate is more than default maximum bit error rate, the minimum of authorized user is unsatisfactory for
Transmission standard, if bit error rate is less than or equal to maximum bit error rate, meet the lowest channel transmission standard of authorized user.
Therefore, if user access control device judges to know the transmission of the authorized user currently obtained according to default control strategy
Quality is unsatisfactory for the transmission standard of authorized user, then determines transmission performance difference and to awarding according to the first network parameter of acquisition
The big at least one cognitive user of user's interference is weighed, and these cognitive users are removed from the frequency range of authorized user successively, often
A cognitive user is removed, just the channel transmission quality of the authorized user is recalculated, is then carried out further according to control strategy
Judge, so circulation, until it is determined that the channel transmission quality of authorized user meets the transmission standard of authorized user, just no longer
Access Control is carried out to the cognitive user for taking authorized user's resource of frequency range.
Wherein, user access control device determines transmission performance difference and to authorized user according to the first network parameter of acquisition
The mode of the big at least one cognitive user of interference is a lot, it preferably includes following two：Mode one, obtain each cognitive user
Transmission gain and the ratio between channel disturbance gain of the cognitive user to authorized user the first ratio, wherein, cognition use
The transmission gain at family is smaller, shows that transmission performance of the cognitive user in the mandate frequency range is poorer, this is in Access Control
During be more desirable to be removed, channel disturbance gain of the cognitive user to authorized user is bigger, show cognitive user to authorize use
The interference at family is bigger, illustrates also to be more desirable to be removed during Access Control.Therefore, the first ratio is smaller, then explanation is with being somebody's turn to do
The transmission performance in the mandate frequency range of cognitive user corresponding to first ratio it is poorer or in the mandate frequency range to awarding
It is bigger to weigh the interference of user, therefore, user access control device according to acquisition the first ratio corresponding with each cognitive user,
Cognitive user corresponding with the first ratio is removed from the frequency range of the authorized user successively according to order from small to large.Mode
Two：Obtain the second of the ratio between the transmission gain of channel disturbance gain and cognitive user of each cognitive user to authorized user
Ratio, wherein, the transmission gain of cognitive user is smaller, shows that the transmission performance of the cognitive user is poorer, cognitive user pair
The channel disturbance gain of authorized user is bigger, shows that interference of the cognitive user to authorized user is bigger, therefore, the second ratio is got over
Greatly, then illustrate that the transmission performance of corresponding with second ratio cognitive user is poorer and interference to authorized user is bigger, therefore,
User access control device is according to acquisition the second ratio corresponding with each cognitive user, according to order from big to small successively
Cognitive user corresponding with the second ratio is removed from the frequency range of the authorized user.
The user access control method that the present embodiment provides, obtained and at least one cognition by user's access control apparatus
The channel transmission quality of the authorized user of users to share itself resource of frequency range, and first network parameter, the first network ginseng
Number includes：Transmission gain corresponding with each cognitive user and the channel disturbance gain to authorized user, if according to default
Control strategy judge know that channel transmission quality does not meet the transmission standard of authorized user, then joined according to first network
It is several that Access Control is carried out to cognitive user, until channel transmission quality meets standard, so as to be effectively prevented from cognitive user to awarding
The interference of user is weighed, ensures the minimum transmission performance requirements of authorized user, while the transmission of cognition wireless network can be maximized
Performance.
Based on above-described embodiment, further, methods described also includes：
If user access control device judges to know that the channel transmission quality of acquisition meets in advance according to default control strategy
If closing thresholding, then will take authorized user's frequency range all cognitive users all remove, until the channel of authorized user
When transmission quality reaches default unlatching thresholding, just restart the processing of cognitive user insertion authority user's free time frequency range,
Wherein, the processing of cognitive user insertion authority user's free time frequency range is belonged into prior art, here is omitted.
For in embodiment illustrated in fig. 1, channel transmission quality specifically includes：Signal to noise ratio, bit error rate, the subframe bit error rate and
At least one parameter in number of retransmissions, in order to which clearer description user access control device is to taking the idle frequency of authorized user
Duan Ziyuan cognitive user carries out the process of Access Control, and Fig. 2 is carried out specifically exemplified by representing channel transmission quality with signal to noise ratio
Explanation.
Fig. 2 is the flow chart of another user access control method provided in an embodiment of the present invention, as shown in Fig. 2 this reality
The channel transmission quality for representing authorized user in example with signal to noise ratio is applied, is specifically described, user access control device is to taking
The process that the cognitive user of authorized user's free time resource of frequency range carries out Access Control specifically includes：
Step 200, obtained from network management system related to the authorized user that the resource of frequency range is taken by least one cognitive user
First network parameter and the second network parameter, the first network parameter include：It is corresponding with each cognitive user to believe
Road transmission gain and the channel disturbance gain to the authorized user；Second network parameter includes：Each cognition is used
The transimission power at family, the transimission power of the authorized user, the transmission gain of the authorized user and described authorize are used
The additive white Gaussian noise at family；
Wireless network is made up of mandate network with cognition wireless network, wherein, authorize network with constant power to mandate
User transmits information, and authorized user has minimum quality of service guarantee, and cognition wireless network can authorize network by perceiving
Frequency spectrum use state, and use the idle resource of frequency range of authorized user.And when authorized user needs to use the idle frequency spectrum of itself
, it is necessary to be controlled the cognitive user of insertion authority network to ensure the transmission performance of authorized user during resource.Specifically, lead to
Crossing in equipment in the wireless network sets user access control device to be controlled with the cognitive user to insertion authority network,
Wherein, the equipment in wireless network includes base station, radio network controller etc., and those skilled in the art can be according to practical application
Need to be selected, the present embodiment is not restricted this.It is worth noting that, the authorized user in the embodiment of the present invention refer to by
At least one cognitive user takes the authorized user of the resource of frequency range, due to multiple authorized users be present in network is authorized, therefore,
User access control device is described in detail to the concrete processing procedure of an authorized user in the present embodiment, at other authorized users
Reason process is similar, and concrete processing procedure is as follows：User access control device is obtained with being recognized by least one from network management system first
Know the related first network parameter of the authorized user of the user occupancy resource of frequency range and the second network parameter, wherein, first network ginseng
Number includes：Transmission gain corresponding with each cognitive user and the channel disturbance gain to authorized user；Second network is joined
Number includes：The transimission power of each cognitive user, the transimission power of authorized user, authorized user transmission gain and
The additive white Gaussian noise of authorized user.
Step 201, according to described with each corresponding channel disturbance gain to the authorized user of the cognitive user
The signal to noise ratio of the authorized user is obtained with second network parameter；
Specifically, transimission power, the biography of authorized user of the user access control device according to each cognitive user of acquisition
Defeated power, the transmission gain of authorized user, the additive white Gaussian noise of authorized user and corresponding with each cognitive user
Channel disturbance gain to authorized user obtain the signal to noise ratio that the signal to noise ratio of authorized user obtains authorized user mode it is a lot,
Preferably, the signal to noise ratio of authorized user is obtained using below equation, the formula is：
Wherein：
For the additive white Gaussian noise of the authorized user；
P is the transimission power of the authorized user；
PkFor the transimission power of each cognitive user；
gkpTo be described with each corresponding channel disturbance gain to the authorized user of the cognitive user；
hpFor the transmission gain of the authorized user.
Step 202, if being judged to know that the signal to noise ratio is less than the default authorized user according to default control strategy
Minimum signal to noise ratio, then obtain the channel disturbance of the transmission gain of each cognitive user with the cognitive user to authorized user
First ratio of the ratio between gain, according to acquisition the first ratio corresponding with each cognitive user, according to order from small to large
Cognitive user corresponding with the first ratio is removed from the frequency range of the authorized user successively, until the signal to noise ratio is more than or equal to
The minimum signal to noise ratio.
Default control strategy ensures that the minimum signal to noise ratio of authorized user is SINRminIf SINR is known in judgement<SINRmin,
Then obtain each cognitive user transmission gain and the ratio between channel disturbance gain of the cognitive user to authorized user
One ratio, wherein, the transmission gain of cognitive user is smaller, shows that the transmission performance of the cognitive user is poorer, cognitive user
Channel disturbance gain to authorized user is bigger, shows that interference of the cognitive user to authorized user is bigger, user access control dress
Put according to acquisition the first ratio corresponding with each cognitive user, successively will be with the first ratio pair according to order from small to large
The cognitive user answered removes from the frequency range of the authorized user.A cognitive user is often removed, just to the noise of the authorized user
Than being recalculated according to above-mentioned formula, then judged further according to control strategy, so circulation, until it is determined that authorized user
Signal to noise ratio is more than or equal to default minimum signal to noise ratio, and just no longer the cognitive user for taking authorized user's resource of frequency range is connect
Enter control.
The present embodiment provide user access control method, by user's access control apparatus from network management system obtain and quilt
At least one cognitive user takes the network parameter of authorized user's correlation of the resource of frequency range, and authorized user is obtained according to network parameter
Signal to noise ratio, if being judged to know that signal to noise ratio is less than default minimum signal to noise ratio according to default control strategy, obtain and each recognize
The transmission gain of user and the first ratio of the ratio between channel disturbance gain of the cognitive user to authorized user are known, according to obtaining
The first ratio corresponding with each cognitive user taken, successively will cognition corresponding with the first ratio according to order from small to large
User removes from the frequency range of the authorized user, until signal to noise ratio is more than or equal to minimum signal to noise ratio, so as to be effectively prevented from recognizing
Interference of the user to authorized user, ensures the minimum transmission performance requirements of authorized user, while can maximize cognitive wireless
The transmission performance of network.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above method embodiment can pass through
Programmed instruction related hardware is completed, and foregoing program can be stored in a computer read/write memory medium, the program
Upon execution, the step of execution includes above method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or light
Disk etc. is various can be with the medium of store program codes.
Fig. 3 is the structural representation of a user access control device provided in an embodiment of the present invention, as shown in figure 3, should
User access control device includes：Acquisition module 11 and control module 12, wherein, it is at least one that acquisition module 11 is used for acquisition
Cognitive user takes the channel transmission quality of the authorized user of the resource of frequency range, and obtains first network parameter from network management system,
The first network parameter includes：Transmission gain corresponding with each cognitive user and the letter to the authorized user
Road obstacle gain；If control module 12 is used to be judged to know that the channel transmission quality is unsatisfactory for institute according to default control strategy
The transmission standard of authorized user is stated, then at least one cognitive user is accessed according to the first network parameter
Control, until the channel transmission quality meets the transmission standard.
Wherein, control module 12 is specifically used for：Obtain the transmission gain of each cognitive user and the cognition
First ratio of the ratio between channel disturbance gain of the user to the authorized user；According to acquisition and each cognitive user pair
The first ratio answered, according to order from small to large successively by cognitive user corresponding with the first ratio from the authorized user's
Removed in frequency range.
Or control module 12 is specifically used for：Obtain channel disturbance of each cognitive user to the authorized user
Second ratio of gain and the ratio between the transmission gain of the cognitive user；According to acquisition and each cognitive user pair
The second ratio answered, according to order from big to small successively by cognitive user corresponding with the second ratio from the authorized user's
Removed in frequency range.
Wherein, if the channel transmission quality is represented with signal to noise ratio, acquisition module 11 is specifically used for：
The second network parameter is obtained from network management system, second network parameter includes：The biography of each cognitive user
Defeated power, the transimission power of the authorized user, the transmission gain of the authorized user and the authorized user plus
Property white Gaussian noise；According to described with each corresponding channel disturbance gain and institute to the authorized user of the cognitive user
State the signal to noise ratio that the second network parameter obtains the authorized user.
The function and handling process of each module, may refer to above-mentioned figure in the user access control device that the present embodiment provides
Embodiment of the method shown in 1, its implementing principle and technical effect is similar, and here is omitted.
Based on above-described embodiment, further, control module 12 is additionally operable to：If judge to know according to default control strategy
The channel transmission quality meets default closing thresholding, then all cognitive users for taking authorized user's frequency range are whole
Remove, until the channel transmission quality reaches default unlatching thresholding, then cognitive user is accessed the authorized user again
Frequency range.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (3)
- A kind of 1. user access control method, it is characterised in that including：The channel transmission quality for the authorized user that the resource of frequency range is taken by least one cognitive user is obtained, and from network management system First network parameter is obtained, the first network parameter includes：Transmission gain corresponding with each cognitive user and Channel disturbance gain to the authorized user；If judged to know that the channel transmission quality is unsatisfactory for the transmission of the authorized user according to default control strategy Standard, then Access Control is carried out at least one cognitive user according to the first network parameter, until the channel passes Transmission quality meets the transmission standard；The channel transmission quality includes：At least one ginseng in signal to noise ratio, bit error rate, the subframe bit error rate and number of retransmissions Number；If the channel transmission quality is represented with signal to noise ratio, the channel transmission quality for obtaining the authorized user specifically includes： The second network parameter is obtained from network management system, second network parameter includes：The transimission power of each cognitive user, institute State the additive white gaussian of the transimission power of authorized user, the transmission gain of the authorized user and the authorized user Noise；According to described with each corresponding channel disturbance gain to the authorized user of the cognitive user and second net The signal to noise ratio of authorized user described in network parameter acquiring；Methods described also includes：If judged to know that the channel transmission quality meets default closing according to default control strategy Thresholding, then all cognitive users for taking authorized user's frequency range are all removed, until the channel transmission quality reaches Default unlatching thresholding, then cognitive user is set to access the frequency range of the authorized user again.
- 2. user access control method according to claim 1, it is characterised in that recognize described in the basis with each described Know that the channel disturbance gain corresponding to user to the authorized user and second network parameter obtain the authorized user's Signal to noise ratio includes：The signal to noise ratio of the authorized user is obtained using below equation, the formula is：<mrow> <mi>S</mi> <mi>I</mi> <mi>N</mi> <mi>R</mi> <mo>=</mo> <mfrac> <mrow> <msubsup> <mi>Ph</mi> <mi>p</mi> <mn>2</mn> </msubsup> </mrow> <mrow> <msubsup> <mi>&sigma;</mi> <mi>p</mi> <mn>2</mn> </msubsup> <mo>+</mo> <munderover> <mi>&Sigma;</mi> <mrow> <mi>k</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>K</mi> </munderover> <msub> <mi>P</mi> <mi>k</mi> </msub> <msubsup> <mi>g</mi> <mrow> <mi>k</mi> <mi>p</mi> </mrow> <mn>2</mn> </msubsup> </mrow> </mfrac> </mrow>Wherein：For the additive white Gaussian noise of the authorized user；P is the transimission power of the authorized user；PkFor the transimission power of each cognitive user；gkpTo be described with each corresponding channel disturbance gain to the authorized user of the cognitive user；hpFor the transmission gain of the authorized user.
- A kind of 3. user access control device, it is characterised in that including：Acquisition module, for obtaining the channel transmission quality for the authorized user that the resource of frequency range is taken by least one cognitive user, And first network parameter is obtained from network management system, the first network parameter includes：It is corresponding with each cognitive user Transmission gain and the channel disturbance gain to the authorized user；Control module, if for being judged to know that the channel transmission quality is unsatisfactory for described authorize and used according to default control strategy The transmission standard at family, then Access Control is carried out at least one cognitive user according to the first network parameter, directly Meet the transmission standard to the channel transmission quality；If the channel transmission quality is represented with signal to noise ratio, the acquisition module is specifically used for：Second is obtained from network management system Network parameter, second network parameter include：The transimission power of each cognitive user, the transmission work(of the authorized user The additive white Gaussian noise of rate, the transmission gain of the authorized user and the authorized user；According to it is described with it is each Channel disturbance gain and second network parameter corresponding to the cognitive user to the authorized user obtain the mandate The signal to noise ratio of user；The control module is additionally operable to：If it is default to know that the channel transmission quality meets according to the judgement of default control strategy Thresholding is closed, then is all removed all cognitive users for taking authorized user's frequency range, until the channel transmission quality Reach default unlatching thresholding, then cognitive user is accessed the frequency range of the authorized user again.
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