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CN102740304A - Method for using a free television channel, and base station - Google Patents

Method for using a free television channel, and base station Download PDF

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Publication number
CN102740304A
CN102740304A CN201110089522XA CN201110089522A CN102740304A CN 102740304 A CN102740304 A CN 102740304A CN 201110089522X A CN201110089522X A CN 201110089522XA CN 201110089522 A CN201110089522 A CN 201110089522A CN 102740304 A CN102740304 A CN 102740304A
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spectrum detection
wireless communication
channel
detection result
idle
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陈星�
李男
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China Mobile Communications Group Co Ltd
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China Mobile Communications Group Co Ltd
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Abstract

本发明公开了一种空闲TV信道的使用方法：具备感知无线电功能的LTE系统工作在一空闲TV信道上，所述LTE系统中的eNB获取频谱检测结果；当根据所述频谱检测结果确定所述空闲TV信道上存在窄带无线通信系统时，根据所述频谱检测结果以及所述窄带无线通信系统的保护要求，确定是否能够与所述窄带无线通信系统共享所述空闲TV信道；如果是，则确定所述窄带无线通信系统的保护范围，并为所述保护范围内的UE调度除所述窄带无线通信系统所占频率以外的资源。本发明同时公开了一种eNB。应用本发明所述的方法和装置，能够提高频率资源的利用率。

Figure 201110089522

The present invention discloses a method for using an idle TV channel: an LTE system with a cognitive radio function works on an idle TV channel, and an eNB in the LTE system acquires a spectrum detection result; when the spectrum detection result is used to determine the When there is a narrowband wireless communication system on the idle TV channel, determine whether the idle TV channel can be shared with the narrowband wireless communication system according to the spectrum detection result and the protection requirements of the narrowband wireless communication system; if yes, determine The protection range of the narrowband wireless communication system, and schedule resources for UEs within the protection range other than frequencies occupied by the narrowband wireless communication system. The invention also discloses an eNB. By applying the method and device of the present invention, the utilization rate of frequency resources can be improved.

Figure 201110089522

Description

A kind of method for using of idle television channel and a kind of base station
Technical field
The present invention relates to wireless communication technology, method for using and a kind of base station of particularly a kind of idle TV (TV) channel.
Background technology
Owing to possess characteristics such as transmission of wireless signals characteristic good, idle frequence aboundresources, the U frequency range is acknowledged as the working frequency range of the tool application prospect of cognitive radio power technology.At present, the system that is operated on the U frequency range is mainly radio data system, simultaneously, also has some narrow band width wireless communication systems in some areas, like wireless microphone system etc.
According to the prior art scheme; For a certain idle TV channel, when not having narrow band width wireless communication systems on it, system for cognitive radio can use and should communicate by free time TV channel; But; If there is narrow band width wireless communication systems, for fear of narrow band interference, system for cognitive radio can not use usually should free time TV channel.That is to say; For bandwidth is the idle TV channel of 8MHz, 7MHz or 6MHz; Only because have the narrow band width wireless communication systems that bandwidth is about 200KHz on it; Just can not be used, thereby greatly reduce the frequency resource utilance gain that utilizes the cognitive radio power technology to obtain by system for cognitive radio.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method for using of idle TV channel, can improve the utilance of frequency resource.
Another object of the present invention is to provide a kind of base station, can improve the utilance of frequency resource.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of method for using of idle TV channel comprises:
The Long Term Evolution LTE system works that possesses the cognitive radio function is on an idle TV channel, and the base station eNB in the said LTE system is obtained frequency spectrum detecting result;
When confirm said idle TV channel according to said frequency spectrum detecting result on, having narrow band width wireless communication systems; According to the protection requirement of said frequency spectrum detecting result and said narrow band width wireless communication systems, determine whether and to share said idle TV channel with said narrow band width wireless communication systems;
If then confirm the protection range of said narrow band width wireless communication systems, and be the resource of user terminal UE scheduling except that the shared frequency of said narrow band width wireless communication systems in the said protection range.
A kind of base station, said base station applies are in the LTE system that possesses the cognitive radio function, and said LTE system works is on an idle TV channel; Said base station comprises:
First processing unit; Be used to obtain frequency spectrum detecting result; When confirm said idle TV channel according to said frequency spectrum detecting result on, having narrow band width wireless communication systems; According to the protection requirement of said frequency spectrum detecting result and said narrow band width wireless communication systems, determine whether and to share said idle TV channel with said narrow band width wireless communication systems, and will confirm that result notification gives second processing unit;
Said second processing unit, be used for when definite result when being, confirm the protection range of said narrow band width wireless communication systems, and be the resource of user terminal UE scheduling except that the shared frequency of said narrow band width wireless communication systems in the said protection range.
It is thus clear that; Adopt technical scheme of the present invention; The LTE system and the narrow band width wireless communication systems that possess the cognitive radio function can be shared same idle TV channel; Thereby improved the utilance of frequency resource, and increased the frequency resource of the LTE system use that can be possessed the cognitive radio function.
Description of drawings
Fig. 1 is the flow chart of the method for using embodiment of the idle TV channel of the present invention.
Fig. 2 is the corresponding sketch map of example according to the invention.
Fig. 3 is the composition structural representation of base station embodiment of the present invention.
Embodiment
For existing system for cognitive radio; Like 802.22 systems; Because the time-frequency structure by OFDM (OFDM) symbol and subcarrier are formed is placed control channel and user data in proper order, therefore, if 802.22 systems and narrow band width wireless communication systems coexistence; Even dispatch user data not on the shared frequency of narrow band width wireless communication systems, also can owing to control channel receives that narrow band interference causes can't proper communication between user terminal (UE) and base station (eNB).
But for the Long Term Evolution that possesses the cognitive radio function (LTE) system (being designated hereinafter simply as the LTE system); Because in its frame structure; Any one down control channel in the control domain transmission all is dispersed to the enterprising row transmission of whole bandwidth; Therefore, even on certain narrower frequency location, received than strong jamming, UE still can come this down control channel of right demodulation according to the signal that on other frequency, receives; Up direction, as long as narrow band interference is not the two ends that are present in bandwidth, promptly not with the location overlap of ascending control channel, then not influence; That is to say that dispatch user data only otherwise on the shared frequency of narrow band width wireless communication systems can guarantee the proper communication between UE and the eNB; In addition, in case of necessity, the eNB in the LTE system also need turn down the transmitting power of self signal, so that the LTE system can satisfy the requirement of frequency control to the interference of narrow band width wireless communication systems.So, can guarantee all not exist between the both sides interference.
Based on above-mentioned introduction, the operational version of the idle TV channel among the present invention after a kind of improvement of proposition.
For make technical scheme of the present invention clearer, understand, below with reference to the accompanying drawing embodiment that develops simultaneously, scheme according to the invention is done to specify further.
Fig. 1 is the flow chart of the method for using embodiment of the idle TV channel of the present invention.As shown in Figure 1, may further comprise the steps:
Step 11:LTE system works is on an idle TV channel, and the eNB in the system obtains frequency spectrum detecting result.
In this step, can obtain frequency spectrum detecting result by eNB when satisfying trigger condition at every turn.
Said triggering can be periodic triggers or the triggering of incident property; As arriving predetermined timing during the moment when each; Perhaps; When the signal quality on certain frequency location was lower than predetermined the requirement, eNB promptly need obtain frequency spectrum detecting result, whether to have narrow band width wireless communication systems on the idle TV channel of confirming the place.
ENB described in the present embodiment and UE all need possess spectrum detection function; Promptly detect the ability of narrow-band interference signal (being the signal of narrow band width wireless communication systems), when the power of narrow-band interference signal when lower and far away apart from eNB, eNB possibly detect less than; So then need detect by UE; And return testing result to eNB, otherwise, then can detect by eNB; If desired, under above-mentioned two kinds of situation, also can come to detect jointly by eNB and UE, the testing result that obtains like this will be more accurate.
Correspondingly, in this step, eNB obtain frequency spectrum detecting result mode can for:
1) eNB carries out frequency spectrum detection, obtains frequency spectrum detecting result;
2) eNB notifies each UE of subordinate to carry out frequency spectrum detection, receives the frequency spectrum detecting result that each UE reports;
Each UE can report frequency spectrum detecting result through frequency spectrum detecting result report;
3) eNB carries out frequency spectrum detection, obtains frequency spectrum detecting result, and notifies each UE of subordinate to carry out frequency spectrum detection, receives the frequency spectrum detecting result that each UE reports.
Need to prove that above-mentioned 3 kinds of modes are merely and illustrate, and in practical application, if adopt other mode, also are fine.
Concrete which kind of mode that adopts can be decided according to the actual requirements.Wherein, for mode 2) and 3), eNB also can return response message to UE after receiving the frequency spectrum detecting result that UE reports, and UE has received its frequency spectrum detecting result that reports with notice.
If detect narrow-band interference signal, will carry the power and the shared information such as frequency range of narrow-band interference signal of narrow-band interference signal in the above-mentioned frequency spectrum detecting result.
Step 12: when confirming according to frequency spectrum detecting result to have narrow band width wireless communication systems on should free time TV channel; ENB is according to the protection requirement of frequency spectrum detecting result and narrow band width wireless communication systems; Determining whether to share with narrow band width wireless communication systems should free time TV channel, if not, then execution in step 13; If then execution in step 14.
In this step, eNB confirms whether there is narrow band width wireless communication systems on the idle TV channel at self place, if do not exist, then using alone according to existing mode should free time TV channel according to the frequency spectrum detecting result that obtains in the step 11; If exist; Then further according to the protection requirement of frequency spectrum detecting result that obtains in the step 11 and narrow band width wireless communication systems; Determining whether to share with narrow band width wireless communication systems should free time TV channel, and according to the different processing mode of different following adopted of confirming the result.
How determining whether to share with narrow band width wireless communication systems free time TV channel to be prior art.
Each UE of step 13:eNB and subordinate switches on other idle TV channel together.
How to switch to prior art.
Follow-up how the processing with scheme according to the invention has nothing to do, and do not introduce.
Step 14:eNB confirms the protection range of narrow band width wireless communication systems, and is the resource of UE scheduling except that the shared frequency of narrow band width wireless communication systems in the protection range.
Protection range how to confirm narrow band width wireless communication systems is similarly prior art.
In order to guarantee not dispatch user data on the shared frequency of narrow band width wireless communication systems; In this step; Be the new resource of the scheduling of the UE in the protection range that is in narrow band width wireless communication systems, this new resource must be the resource except that the shared frequency of narrow band width wireless communication systems; Follow-up, eNB can notify new scheduled resources to corresponding UE.
In addition, in this step, in case of necessity, eNB also need turn down the transmitting power of self signal, so that the LTE system can satisfy the requirement of frequency control to the interference of narrow band width wireless communication systems.Turn down transmitting power under which kind of situation and what are turned down and all can be decided according to the actual requirements.
Through an example flow process shown in Figure 1 is further specified below:
Fig. 2 is the corresponding sketch map of example according to the invention.As shown in Figure 2, circle 21 is wherein represented the coverage of eNB, and circle 22 is represented the protection range of narrow band width wireless communication systems, the scope of circle 23 for determining according to existing certain algorithm; When circle 22 exist to occur simultaneously with circle 23, the LTE system need switch on other idle TV channel, when circle 22 and circle 23 do not exist when occuring simultaneously; In the time of promptly in circle 22 is in the zone of enclosing 21-circle 23; LTE system and narrow band width wireless communication systems can be shared idle TV channel, and, for enclosing the resource beyond the shared frequency of UE scheduling narrow band width wireless communication systems in 22; In case of necessity, also need reduce the signal transmission power of eNB.
So far, promptly accomplished the introduction of the inventive method embodiment.
Based on above-mentioned introduction, Fig. 3 is the composition structural representation of base station embodiment of the present invention, and this base station applies is in the LTE system that possesses the cognitive radio function, and this LTE system works is on an idle TV channel; As shown in Figure 3, this base station comprises:
First processing unit 31; Be used to obtain frequency spectrum detecting result; When confirming according to frequency spectrum detecting result to have narrow band width wireless communication systems on should free time TV channel; According to the protection requirement of frequency spectrum detecting result and narrow band width wireless communication systems, determining whether to share with narrow band width wireless communication systems should free time TV channel, and will confirm that result notification gives second processing unit 32;
Second processing unit 32, be used for when definite result when being, confirm the protection range of narrow band width wireless communication systems, and be the resource of UE scheduling except that the shared frequency of narrow band width wireless communication systems in the protection range.
Wherein, can specifically comprise in first processing unit 31:
First handles subelement 311, is used for when satisfying trigger condition, carrying out frequency spectrum detection at every turn, obtains frequency spectrum detecting result; Perhaps, notify each UE of subordinate to carry out frequency spectrum detection, receive the frequency spectrum detecting result that each UE reports; Perhaps, carry out frequency spectrum detection, obtain frequency spectrum detecting result, and notify each UE of subordinate to carry out frequency spectrum detection, receive the frequency spectrum detecting result that each UE reports; Frequency spectrum detecting result is sent to second handle subelement 312;
Second handles subelement 312; Be used for when confirming according to frequency spectrum detecting result to have narrow band width wireless communication systems on should free time TV channel; Protection requirement according to frequency spectrum detecting result and narrow band width wireless communication systems; Determining whether to share with narrow band width wireless communication systems should free time TV channel, and will confirm that result notification gives second processing unit 32.
Above-mentioned trigger condition can comprise: periodic triggers and the triggering of incident property.
In addition, above-mentioned second processing unit 32 can be further used for, when definite result when being, turn down self signal transmission power; And, when definite result for not the time and each UE of subordinate switch to together on other idle TV channel.
The concrete workflow of base station embodiment shown in Figure 3 please with reference to the middle respective description of method embodiment shown in Figure 1, repeats no more here.
In a word, adopt technical scheme of the present invention, when the LTE system discovery self belongs to when having narrow band width wireless communication systems on the idle TV channel; Can select to switch on other idle TV channel; Also can select to share with narrow band width wireless communication systems should free time TV channel, for shared this situation, need be the shared frequency of the scheduling narrow band width wireless communication systems of the UE in the protection range that is in narrow band width wireless communication systems resource in addition; In case of necessity; Also adjustable low signal transmitting power, thus the utilance of frequency resource improved, and increased the frequency resource that the LTE system can use.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope that the present invention protects.

Claims (10)

1.一种空闲电视TV信道的使用方法，其特征在于，包括：1. A method for using an idle TV channel, characterized in that, comprising: 具备感知无线电功能的长期演进LTE系统工作在一空闲TV信道上，所述LTE系统中的基站eNB获取频谱检测结果；The Long Term Evolution LTE system with the cognitive radio function works on an idle TV channel, and the base station eNB in the LTE system acquires a spectrum detection result; 当根据所述频谱检测结果确定所述空闲TV信道上存在窄带无线通信系统时，根据所述频谱检测结果以及所述窄带无线通信系统的保护要求，确定是否能够与所述窄带无线通信系统共享所述空闲TV信道；When it is determined according to the spectrum detection result that a narrowband wireless communication system exists on the idle TV channel, determine whether the narrowband wireless communication system can share the narrowband wireless communication system according to the spectrum detection result and the protection requirements of the narrowband wireless communication system. Said free TV channel; 如果是，则确定所述窄带无线通信系统的保护范围，并为所述保护范围内的用户终端UE调度除所述窄带无线通信系统所占频率以外的资源。If so, determine the protection range of the narrowband wireless communication system, and schedule resources other than frequencies occupied by the narrowband wireless communication system for user terminals UE within the protection range. 2.根据权利要求1所述的方法，其特征在于，所述eNB获取频谱检测结果包括：2. The method according to claim 1, wherein said eNB obtaining the spectrum detection result comprises: 所述eNB进行频谱检测，得到频谱检测结果；The eNB performs spectrum detection to obtain a spectrum detection result; 或者，所述eNB通知下属各UE进行频谱检测，接收各UE上报的频谱检测结果；Or, the eNB notifies each subordinate UE to perform spectrum detection, and receives the spectrum detection result reported by each UE; 或者，所述eNB进行频谱检测，得到频谱检测结果，并通知下属各UE进行频谱检测，接收各UE上报的频谱检测结果。Alternatively, the eNB performs spectrum detection, obtains a spectrum detection result, notifies each subordinate UE to perform spectrum detection, and receives the spectrum detection result reported by each UE. 3.根据权利要求1所述的方法，其特征在于，所述eNB获取频谱检测结果包括：当每次满足触发条件时，所述eNB获取频谱检测结果；3. The method according to claim 1, wherein the obtaining the spectrum detection result by the eNB comprises: acquiring the spectrum detection result by the eNB each time a trigger condition is met; 所述触发条件包括：周期性触发和事件性触发。The trigger conditions include: periodic trigger and event trigger. 4.根据权利要求1或3所述的方法，其特征在于，该方法进一步包括：4. The method according to claim 1 or 3, characterized in that the method further comprises: 当能够与所述窄带无线通信系统共享所述空闲TV信道时，所述eNB调低自身信号发射功率。When the idle TV channel can be shared with the narrowband wireless communication system, the eNB lowers its own signal transmission power. 5.根据权利要求1或3所述的方法，其特征在于，该方法进一步包括：5. The method according to claim 1 or 3, characterized in that the method further comprises: 当不能与所述窄带无线通信系统共享所述空闲TV信道时，所述eNB和其下属各UE一起切换到其它空闲TV信道上。When the idle TV channel cannot be shared with the narrowband wireless communication system, the eNB and its subordinate UEs switch to other idle TV channels together. 6.一种基站，其特征在于，所述基站应用于具备感知无线电功能的长期演进LTE系统中，所述LTE系统工作在一空闲电视TV信道上；所述基站包括：6. A base station, wherein the base station is applied in a long-term evolution LTE system with a cognitive radio function, and the LTE system works on an idle TV channel; the base station includes: 第一处理单元，用于获取频谱检测结果，当根据所述频谱检测结果确定所述空闲TV信道上存在窄带无线通信系统时，根据所述频谱检测结果以及所述窄带无线通信系统的保护要求，确定是否能够与所述窄带无线通信系统共享所述空闲TV信道，并将确定结果通知给第二处理单元；The first processing unit is configured to obtain a spectrum detection result, and when it is determined according to the spectrum detection result that a narrowband wireless communication system exists on the idle TV channel, according to the spectrum detection result and the protection requirements of the narrowband wireless communication system, determining whether the idle TV channel can be shared with the narrowband wireless communication system, and notifying the second processing unit of a determination result; 所述第二处理单元，用于当确定结果为是时，确定所述窄带无线通信系统的保护范围，并为所述保护范围内的用户终端UE调度除所述窄带无线通信系统所占频率以外的资源。The second processing unit is configured to, when the determination result is yes, determine the protection range of the narrowband wireless communication system, and schedule user terminals UE within the protection range other than frequencies occupied by the narrowband wireless communication system H. 7.根据权利要求6所述的基站，其特征在于，所述第一处理单元包括：7. The base station according to claim 6, wherein the first processing unit comprises: 第一处理子单元，用于当每次满足触发条件时，进行频谱检测，得到频谱检测结果；或者，通知下属各UE进行频谱检测，接收各UE上报的频谱检测结果；或者，进行频谱检测，得到频谱检测结果，并通知下属各UE进行频谱检测，接收各UE上报的频谱检测结果；将频谱检测结果发送给第二处理子单元；The first processing subunit is configured to perform spectrum detection and obtain a spectrum detection result each time the trigger condition is met; or, notify each subordinate UE to perform spectrum detection, and receive the spectrum detection result reported by each UE; or, perform spectrum detection, Obtain the spectrum detection result, and notify the subordinate UEs to perform spectrum detection, receive the spectrum detection result reported by each UE; send the spectrum detection result to the second processing subunit; 所述第二处理子单元，用于当根据所述频谱检测结果确定所述空闲TV信道上存在窄带无线通信系统时，根据所述频谱检测结果以及所述窄带无线通信系统的保护要求，确定是否能够与所述窄带无线通信系统共享所述空闲TV信道，并将确定结果通知给所述第二处理单元。The second processing subunit is configured to, when it is determined according to the spectrum detection result that a narrowband wireless communication system exists on the idle TV channel, determine whether The idle TV channel can be shared with the narrowband wireless communication system, and the determination result is notified to the second processing unit. 8.根据权利要求7所述的基站，其特征在于，所述触发条件包括：周期性触发和事件性触发。8. The base station according to claim 7, wherein the trigger conditions include: periodic trigger and event trigger. 9.根据权利要求6所述的基站，其特征在于，所述第二处理单元进一步用于，当确定结果为是时，调低自身信号发射功率。9. The base station according to claim 6, wherein the second processing unit is further configured to, when the determination result is yes, lower its own signal transmission power. 10.根据权利要求6所述的基站，其特征在于，所述第二处理单元进一步用于，当确定结果为否时，和下属各UE一起切换到其它空闲TV信道上。10. The base station according to claim 6, wherein the second processing unit is further configured to, when the determination result is negative, switch to other idle TV channels together with subordinate UEs.
CN201110089522XA 2011-04-11 2011-04-11 Method for using a free television channel, and base station Pending CN102740304A (en)

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CN104902505A (en) * 2014-03-05 2015-09-09 中国移动通信集团公司 Method and device for interference detection, and method, device and system for interference elimination

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CN1998211A (en) * 2004-06-16 2007-07-11 三星电子株式会社 Method for transmitting/receiving data in mobile communication system using an OFDMA scheme
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Publication number Priority date Publication date Assignee Title
WO2014071731A1 (en) * 2012-11-06 2014-05-15 华为技术有限公司 Dynamic spectrum management method, device and system
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Application publication date: 20121017