CN103648101A - Frequency spectrum resource distribution method and control node - Google Patents
Frequency spectrum resource distribution method and control node Download PDFInfo
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- CN103648101A CN103648101A CN201310662019.8A CN201310662019A CN103648101A CN 103648101 A CN103648101 A CN 103648101A CN 201310662019 A CN201310662019 A CN 201310662019A CN 103648101 A CN103648101 A CN 103648101A
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Abstract
The invention discloses a frequency spectrum resource distribution method and relates to the communication technology field. The method is used to solve a problem that user communication quality is low caused by frequency spectrum switching. The method provided in the invention comprises the following steps that when a master user of a first base station occupies an authorized frequency spectrum resource of a slave user of the first base station, the first base station acquires a current idle frequency spectrum resource; when the idle frequency spectrum resource is a negotiation frequency spectrum resource, the first base station sends a frequency spectrum negotiation request to a control node, wherein the frequency spectrum negotiation request carries the authorized frequency spectrum resource; the frequency spectrum negotiation request is responded to, the control node determines a conventional frequency spectrum resource according to the authorized frequency spectrum resource and sends a frequency spectrum negotiation instruction to a second base station which uses the conventional frequency spectrum resource right now so that the second base station responds to the frequency spectrum negotiation instruction and the frequency spectrum resource used by the node is adjusted to a unconventional frequency spectrum resource; the control node informs the first base station to use the conventional frequency spectrum resource to communicate with the slave user.
Description
Technical field
The present invention relates to communication technical field, relate in particular to method and control node that a kind of frequency spectrum resource distributes.
Background technology
Development along with wireless communication technology and user's request, demand to frequency spectrum is increasing, available frequency spectrum resource is also more and more nervous, and promoting the utilance of wireless frequency spectrum and correlation technique research becomes all contents of concern very of national governments and whole communication industry's chain.Cognitive radio (CR), not producing under the prerequisite of harmful interference having authorized user or other unauthorized users of frequency spectrum, can allow user to access unlicensed spectrum resource by the mode of selecting a good opportunity.
But according to the application of principle of CR, because primary user has absolute priority to frequency, when primary user reuses its mandate frequency spectrum resource, from user in requisition for exiting this frequency spectrum cavity-pocket to ensure primary user's communication quality.Due to the yielding to primary user from user, make often to produce frequency spectrum from user and switch.
And for the user in a cognitive system, selectable cognitive frequency may be from a plurality of frequency bands, and the propagation characteristic aspect of the cognitive frequencies of these candidates exists natural difference on different frequency.When the range spans of cognitive frequency is very large, its difference will be huge, and the difference main manifestations of these " frequency spectrum cavity-pockets " is: 1, the different frequency network coverage is apart from difference.According to electromagnetic wave propagation characteristic, coverage distance and the frequency of base station are just inversely proportional to, and the higher coverage distance of carrier frequency is less.Therefore, suppose to be in the call of covering edge, base station from user, now need occurrence frequency to switch, as become f2 from carrier frequency f1, and, after user uses carrier frequency to become greatly, can there is to cause because base station covering is discontinuous user's communication disruption in f1<f2; 2, the Doppler frequency shift difference that different frequency causes.Doppler frequency shift is directly proportional to electromagnetic frequency f and moving velocity of terminal υ, and frequency is higher, and moving velocity of terminal is faster, and Doppler frequency shift is more remarkable.And the degree of the size of Doppler frequency shift and time selective fading (rapid fading) is closely related.Therefore,, when same user uses different frequency, likely the impact because of Doppler frequency shift obtains different transmission qualities.
In view of above-mentioned analysis, due to the propagation properties difference in frequency spectrum cavity-pocket inhomogeneities factor, during the cognitive frequency of use different frequency range, obtain different transmission characteristics.Owing to can only accessing idle frequency spectrum resource from user, if therefore this idle frequency spectrum resource is excessive with the frequency spectrum resource gap originally taking from user, will inevitably cause transmission quality to decline, affect normal business information transmission.
Summary of the invention
Embodiments of the invention provide a kind of method that frequency spectrum resource distributes and control node, for solving, do not mate the problem that causes the QoS of business to be protected from user's communication quality decline that causes because of frequency and user's environment of living in.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of method that the embodiment of the present invention provides frequency spectrum resource to distribute, comprising:
When the primary user of the first base station takies the mandate frequency spectrum resource from user of the first base station, described the first base station obtains current idle frequency spectrum resource;
When described idle frequency spectrum resource is only while consulting frequency spectrum resource, described the first base station sends negotiation of spectrum request to controlling node, and described negotiation of spectrum request carries described mandate frequency spectrum resource;
In response to described negotiation of spectrum request, described control node is determined conventional frequency spectrum resource according to described mandate frequency spectrum resource, and send negotiation of spectrum instruction to the second base station of the described conventional frequency spectrum resource of current use, so that described the second base station is in response to described negotiation of spectrum instruction, will self use frequency spectrum resource to be adjusted to unconventional frequency spectrum resource;
Described control node notifies described the first base station use described conventional frequency spectrum resource and describedly from user, communicate;
Wherein, described conventional frequency spectrum resource is the frequency spectrum resource that the difference of frequency and described mandate frequency spectrum resource is no more than certain threshold value, and described negotiation frequency spectrum resource is the frequency spectrum resource that the difference of frequency and described mandate frequency spectrum resource surpasses described certain threshold value.
The control node that the embodiment of the present invention also provides a kind of frequency spectrum resource to distribute, comprising: database, Analysis of Policy Making module and network configuration Executive Module;
Wherein, described Analysis of Policy Making module, for the negotiation of spectrum request sending in response to the first base station, described control node is according to authorizing frequency spectrum resource to determine conventional frequency spectrum resource; Wherein, the negotiation of spectrum request that described the first base station sends is, when the primary user of the first base station takies the mandate frequency spectrum resource from user of the first base station, and when described the first base station is determined current idle frequency spectrum resource only for negotiation frequency spectrum resource, to the negotiation of spectrum request of controlling node transmission, described negotiation of spectrum request carries described mandate frequency spectrum resource;
Described network configuration Executive Module, for when described idle frequency spectrum resource is only negotiation frequency spectrum resource, the second base station to the conventional frequency spectrum resource of current use sends negotiation of spectrum instruction, so that described the second base station is in response to described negotiation of spectrum instruction, will self use frequency spectrum resource to be adjusted to unconventional frequency spectrum resource; Notice is described for using described conventional frequency spectrum resource from the first base station of user's service and describedly communicating from user; Wherein, described conventional frequency spectrum resource is the frequency spectrum resource that the difference of frequency and described mandate frequency spectrum resource is no more than certain threshold value, and described negotiation frequency spectrum resource is the frequency spectrum resource that the difference of frequency and described mandate frequency spectrum resource surpasses described certain threshold value;
Described database, for storing frequency spectrum resource information.
Method and control node that the embodiment of the present invention provides a kind of frequency spectrum resource to distribute, when the mandate frequency spectrum resource from user is taken by primary user, when only there is the frequency spectrum resource causing from telex network broken string in current idle frequency spectrum resource, this frequency spectrum resource is abdicated to using from user in this base station of base station requests that is taking conventional frequency spectrum resource with regard to whereabouts, and the user of this base station oneself service is coordinated to other frequency spectrum resources, both guaranteed the user's of self service communication quality, also guaranteed the communication quality from user, thereby guaranteed the QoS of survice from user.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The method flow diagram that a kind of frequency spectrum resource that Fig. 1 provides for the embodiment of the present invention distributes;
A kind of frequency spectrum resource distribution schematic diagram that Fig. 2 provides for the embodiment of the present invention;
The method flow diagram that the another kind of frequency spectrum resource that Fig. 3 provides for the embodiment of the present invention distributes;
The flow process interaction figure that the another kind of frequency spectrum resource that Fig. 4 provides for the embodiment of the present invention distributes;
A kind of composition frame chart of controlling node that Fig. 5 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
A kind of method that the embodiment of the present invention provides frequency spectrum resource to distribute, be mainly used in 3-G (Generation Three mobile communication system), in this system, at least comprise a plurality of base stations and a control node that can communicate with these base stations, this control node is mainly used in the cognitive of frequency spectrum resource and distributes, as shown in Figure 1, the method comprises:
101, when the primary user of the first base station takies the mandate frequency spectrum resource from user of the first base station, described the first base station obtains current idle frequency spectrum resource.
Wherein, authorizing frequency spectrum resource is the pre-configured frequency spectrum resource using to primary user in each base station, and the described mandate frequency spectrum resource using from user is that the frequency spectrum resource from user is distributed in the first base station in order to increase power system capacity temporarily, therefore, when if primary user need to take this frequency spectrum resource, from user, must dodge, thus the follow-up flow process of the triggering embodiment of the present invention.
Wherein, current idle frequency spectrum resource can be obtained current perceptible all idle frequency spectrum resources, also can search idle frequency spectrum resource for the close frequency spectrum resource of mandate frequency spectrum resource frequency from user.
102, when described idle frequency spectrum resource is only while consulting frequency spectrum resource, described the first base station sends negotiation of spectrum request to controlling node, and described negotiation of spectrum request carries described mandate frequency spectrum resource;
Wherein, described negotiation of spectrum request portability has the mandate frequency spectrum resource using from user, also can carry other indication information that can get the mandate frequency spectrum resource using from user.
103, in response to described negotiation of spectrum request, described control node is determined conventional frequency spectrum resource according to described mandate frequency spectrum resource, and send negotiation of spectrum instruction to the second base station of the described conventional frequency spectrum resource of current use, so that described the second base station is in response to described negotiation of spectrum instruction, will self use frequency spectrum resource to be adjusted to unconventional frequency spectrum resource.
Wherein, described conventional frequency spectrum resource is that frequency and described mandate frequency spectrum resource differ the frequency spectrum resource that is no more than certain threshold value, and described negotiation frequency spectrum resource is the frequency spectrum resource that the difference of frequency and described mandate frequency spectrum resource surpasses described certain threshold value.Unconventional frequency spectrum resource is that the conventional frequency spectrum resource that frequency and described the second base station are being used differs the frequency spectrum resource that is no more than certain threshold value, that is, and and the corresponding conventional frequency spectrum resource of conventional frequency spectrum resource that described the second base station is being used.Also requiring described unconventional frequency spectrum resource can not be the mandate frequency spectrum resource of the second base station simultaneously.Therefore, if the second base station does not have spendable unconventional frequency spectrum resource, negotiation of spectrum can be refused in the second base station, and now, controlling node just needs again to other base stations, to re-start assigning of negotiation of spectrum instruction.
Because frequency of utilization and mandate frequency spectrum resource differ distant frequency spectrum resource, can cause base station and from communicating by letter between user, occur that the situation of broken string occurs, therefore, the embodiment of the present invention is distinguished the frequency spectrum resource that can not cause broken string and the frequency spectrum resource that can cause broken string with conventional frequency spectrum resource and negotiation frequency spectrum resource, and using certain threshold value as spectral boundaries, the setting of this threshold value can be take field test result or K-theoretic operation K result as according to setting.Object lesson can be with reference to frequency spectrum resource distribution map as shown in Figure 2, f0 is for authorizing the intermediate frequency of frequency spectrum resource, by than f0 low and higher than f0 but the cognitive frequency that is more or less the same (as B section left side and A section frequency spectrum in figure) is classified as conventional frequency spectrum resource, the frequency spectrum resource that meets formula (1) is classified as conventional frequency spectrum resource.
|f-f
0|≤f
pilot （1）
Wherein, f is frequency, meets A section spectral frequencies fA<f<B section spectral frequencies fB, and fpilot is threshold value, is generally taken as constant.
Meanwhile, the frequency (as C section frequency spectrum in figure and D section frequency spectrum) that is higher or lower than certain limit than f0 is divided into negotiation frequency spectrum resource, the frequency spectrum resource that meets formula (2) is classified as negotiation frequency spectrum resource.
|f-f
0|>f
pilot （2）
Wherein, f is frequency, meets f<C section spectral frequencies fC.
What deserves to be explained is, if there are a plurality of frequency spectrum resources in idle frequency spectrum resource, and each frequency spectrum resource is distributed to different base stations and is used, can all send negotiation of spectrum instruction to these base stations, or according to the actual band demand from user, one or several base station sends negotiation of spectrum instruction wherein.
104, described control node notifies described the first base station use described conventional frequency spectrum resource and describedly from user, communicate.
A kind of method that the embodiment of the present invention provides frequency spectrum resource to distribute, when the mandate frequency spectrum resource from user is taken by primary user, by the first base station, determine in current idle frequency spectrum resource while only there is the frequency spectrum resource causing from telex network broken string, to controlling node, send negotiation of spectrum request, so that taking this base station of base station requests of conventional frequency spectrum resource, control node whereabouts abdicates this frequency spectrum resource to using from user, and the user of this base station oneself service is coordinated to other frequency spectrum resources, both guaranteed the user's of self service communication quality, also guaranteed the communication quality from user, thereby guaranteed the QoS of survice from user.
In addition, for there is the situation of conventional frequency spectrum resource in described idle frequency spectrum resource, as shown in Figure 3, and the method that the embodiment of the present invention also provides corresponding frequency spectrum resource to distribute, carry out with step 101 and comprise afterwards:
105, described the first base station is directly used conventional frequency spectrum resource in described idle frequency spectrum resource and describedly from user, is communicated.
Therefore owing to can directly using conventional frequency spectrum resource, the first base station can not need to coordinate with other base station and directly uses this routine frequency spectrum resource.
In addition, once after frequency spectrum resource determines, need each base station to report the service condition of self frequency spectrum resource, to guarantee the accuracy of idle frequency spectrum resource lookup.Especially through the frequency spectrum resource of adjusting, distribute, the first base station and the second base station that for example the embodiment of the present invention relates to, therefore, require to control node and receive the frequency spectrum resource service condition that described the first base station and described the second base station report, and according to the described frequency spectrum resource service condition reporting, upgrade current idle frequency spectrum resource.Certainly, if consult flow process, only relate to two base stations, only need these two base stations to report frequency spectrum resource service condition, if there are more base stations to participate in consulting flow process, need these base stations all to report frequency spectrum resource service condition separately.
The embodiment of the present invention be take two base station negotiate as example specifically describes the method that frequency spectrum resource distributes, and as shown in Figure 4, comprising:
1, control node periodically informing base station 1 and base station 2 about the information of idle frequency spectrum resource.
2, the appearance whether frequency spectrum resource that it is using has primary user is monitored by frequency spectrum detection in base station 1.If when primary user being detected and wanting to use the frequency spectrum resource using from user, need to dodge primary user from user.Now by occurrence frequency handoff procedure.
When 3,1 discovery current idle frequency spectrum resource in base station is greater than fpilot with mandate frequency spectrum resource interval, idle frequency spectrum resource is for consulting frequency spectrum resource, and now transmission frequency negotiation of base station 1 solicited message, inquires whether there is conventional frequency spectrum resource to controlling node.
If 4a, control node are found base station 2 and are being used conventional frequency spectrum resource, send frequency negotiation instruction to target BS 2.
4b, target BS 2 are consulted to confirm to controlling node feedback.
5, control node and carry out spectrum allocation may decision-making.
6, control node and distribute new frequency spectrum resource to base station 2.
Wherein, the new frequency spectrum resource distributing for base station 2 must be the frequency spectrum resource that does not affect base station 2 user's normal service, the unconventional negotiation frequency spectrum resource of mentioning in abovementioned steps 103.
7, base station 2 agrees to the frequency spectrum resource of current use to be switched to described new frequency spectrum resource, and user's 2 frequencies of utilization of informing base station 2 current service change.
8, base station 2 is stored 2 downlink datas of the user under connection status in the buffer memory of base station into, then carries out frequency switching.
9, user 2 is also correspondingly switched to the frequency that base station 2 is used at present, and base station 2 sends the data in buffer memory to terminal again, to keep the continuity of terminal.
10a, base station 2 send Data Update information to controlling node.
10b, control node complete database update configuration information, and to base station, 2 return to the success of confirmation configuration information update.
11, control node and distribute described conventional frequency spectrum resource to base station 1.
12, base station 1 is switched to use frequency spectrum resource on conventional frequency spectrum resource, and notifies user's frequency of utilization to change.
13, base station 1 is stored 1 downlink data of the user under connection status in the buffer memory of base station into, then carries out frequency switching.
14, user 1 is also correspondingly switched to the frequency that base station 1 is used at present, and base station 1 sends the data in buffer memory to terminal again, to keep the continuity of terminal.
15a, base station 1 send Data Update information to controlling node.
15b, control node complete database update configuration information, and to base station, 1 returns to the success of confirmation configuration information update.
The control node that the embodiment of the present invention also provides a kind of frequency spectrum resource to distribute, as shown in Figure 5, comprising: Analysis of Policy Making module 21, network configuration Executive Module 22 and database 23;
Wherein, described Analysis of Policy Making module 21, for the negotiation of spectrum request sending in response to the first base station, described control node is determined conventional frequency spectrum resource according to described mandate frequency spectrum resource; Wherein, the negotiation of spectrum request that described the first base station sends is, when the primary user of the first base station takies the mandate frequency spectrum resource from user of the first base station, and when described the first base station is determined current idle frequency spectrum resource only for negotiation frequency spectrum resource, to the negotiation of spectrum request of controlling node transmission, described negotiation of spectrum request carries described mandate frequency spectrum resource.
Described network configuration Executive Module 22, for when described idle frequency spectrum resource is only negotiation frequency spectrum resource, the second base station to the conventional frequency spectrum resource of current use sends negotiation of spectrum instruction, so that described the second base station is in response to described negotiation of spectrum instruction, will self use frequency spectrum resource to be adjusted to unconventional frequency spectrum resource; Notice is described for using described conventional frequency spectrum resource from the first base station of user's service and describedly communicating from user; Wherein, described conventional frequency spectrum resource is the frequency spectrum resource that the difference of frequency and described mandate frequency spectrum resource is no more than certain threshold value, and described negotiation frequency spectrum resource is the frequency spectrum resource that the difference of frequency and described mandate frequency spectrum resource surpasses described certain threshold value.
Described database 23, for storing frequency spectrum resource information.
Optionally, described network configuration Executive Module 22 is also for when there is conventional frequency spectrum resource in described idle frequency spectrum resource, notifies described the first base station use conventional frequency spectrum resource in described idle frequency spectrum resource and describedly from user, communicate.
Optionally, the negotiation of spectrum request that described Analysis of Policy Making module 21 also sends for receiving the first base station, described negotiation of spectrum request carries described mandate frequency spectrum resource; And in response to described negotiation of spectrum request, according to described mandate frequency spectrum resource, determine current idle frequency spectrum resource.
Optionally, the frequency spectrum resource service condition that described Analysis of Policy Making module 21 also reports for receiving described the first base station and described the second base station, and according to the described frequency spectrum resource service condition reporting, upgrade current idle frequency spectrum resource.
The control node that the embodiment of the present invention provides a kind of frequency spectrum resource to distribute, when the mandate frequency spectrum resource from user is taken by primary user, when only there is the frequency spectrum resource causing from telex network broken string in current idle frequency spectrum resource, this frequency spectrum resource is abdicated to using from user in this base station of base station requests that is taking conventional frequency spectrum resource with regard to whereabouts, and the user of this base station oneself service is coordinated to other frequency spectrum resources, both guaranteed the user's of self service communication quality, also guarantee the communication quality from user, thereby guaranteed the QoS of survice from user.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add essential common hardware by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Understanding based on such, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium can read, as the floppy disk of computer, hard disk or CD etc., comprise some instructions with so that computer equipment (can be personal computer, server, or the network equipment etc.) carry out the method described in each embodiment of the present invention.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of described claim.
Claims (6)
1. the method that frequency spectrum resource distributes, is characterized in that, comprising:
When the primary user of the first base station takies the mandate frequency spectrum resource from user of the first base station, described the first base station obtains current idle frequency spectrum resource;
When described idle frequency spectrum resource is only while consulting frequency spectrum resource, described the first base station sends negotiation of spectrum request to controlling node, and described negotiation of spectrum request carries described mandate frequency spectrum resource;
In response to described negotiation of spectrum request, described control node is determined conventional frequency spectrum resource according to described mandate frequency spectrum resource, and send negotiation of spectrum instruction to the second base station of the described conventional frequency spectrum resource of current use, so that described the second base station is in response to described negotiation of spectrum instruction, will self use frequency spectrum resource to be adjusted to unconventional frequency spectrum resource;
Described control node notifies described the first base station use described conventional frequency spectrum resource and describedly from user, communicate;
Wherein, described conventional frequency spectrum resource is the frequency spectrum resource that the difference of frequency and described mandate frequency spectrum resource is no more than certain threshold value, and described negotiation frequency spectrum resource is the frequency spectrum resource that the difference of frequency and described mandate frequency spectrum resource surpasses described certain threshold value.
2. method according to claim 1, is characterized in that, after described the first base station obtains current idle frequency spectrum resource, also comprises:
While there is conventional frequency spectrum resource in described idle frequency spectrum resource, described the first base station is directly used conventional frequency spectrum resource in described idle frequency spectrum resource and describedly from user, is communicated.
3. method according to claim 1, is characterized in that, at described control node, notifies described the first base station to use described conventional frequency spectrum resource and described after user communicates, and also comprises:
Described control node receives the frequency spectrum resource service condition that described the first base station and described the second base station report, and according to the described frequency spectrum resource service condition reporting, upgrades current idle frequency spectrum resource.
4. the control node that frequency spectrum resource distributes, is characterized in that, comprising: database, Analysis of Policy Making module and network configuration Executive Module;
Wherein, described Analysis of Policy Making module, for the negotiation of spectrum request sending in response to the first base station, described control node is according to authorizing frequency spectrum resource to determine conventional frequency spectrum resource; Wherein, the negotiation of spectrum request that described the first base station sends is, when the primary user of the first base station takies the mandate frequency spectrum resource from user of the first base station, and when described the first base station is determined current idle frequency spectrum resource only for negotiation frequency spectrum resource, to the negotiation of spectrum request of controlling node transmission, described negotiation of spectrum request carries described mandate frequency spectrum resource;
Described network configuration Executive Module, for when described idle frequency spectrum resource is only negotiation frequency spectrum resource, the second base station to the conventional frequency spectrum resource of current use sends negotiation of spectrum instruction, so that described the second base station is in response to described negotiation of spectrum instruction, will self use frequency spectrum resource to be adjusted to unconventional frequency spectrum resource; Notice is described for using described conventional frequency spectrum resource from the first base station of user's service and describedly communicating from user; Wherein, described conventional frequency spectrum resource is the frequency spectrum resource that the difference of frequency and described mandate frequency spectrum resource is no more than certain threshold value, and described negotiation frequency spectrum resource is the frequency spectrum resource that the difference of frequency and described mandate frequency spectrum resource surpasses described certain threshold value;
Described database, for storing frequency spectrum resource information.
5. control node according to claim 4, it is characterized in that, described network configuration Executive Module is also for when there is conventional frequency spectrum resource in described idle frequency spectrum resource, notifies described the first base station use conventional frequency spectrum resource in described idle frequency spectrum resource and describedly from user, communicate.
6. control node according to claim 4, it is characterized in that, the frequency spectrum resource service condition that described Analysis of Policy Making module also reports for receiving described the first base station and described the second base station, and according to the described frequency spectrum resource service condition reporting, upgrade current idle frequency spectrum resource.
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Application publication date: 20140319 |