CN105790865B - A kind of frequency spectrum perception detection method and system - Google Patents
A kind of frequency spectrum perception detection method and system Download PDFInfo
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- CN105790865B CN105790865B CN201410822259.4A CN201410822259A CN105790865B CN 105790865 B CN105790865 B CN 105790865B CN 201410822259 A CN201410822259 A CN 201410822259A CN 105790865 B CN105790865 B CN 105790865B
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- frequency point
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- random sequence
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Abstract
This application discloses a kind of frequency spectrum perception detection method and systems, it include: the idle frequency point for currently being perceived, base station sends detectable signal to user equipment (UE) using Physical Downlink Shared Channel PDSCH on the free time frequency point, the detectable signal includes MAC header part and the part pseudo-random sequence PN, wherein, the MAC header is divided into the information for being used to indicate that notebook data packet is the useless packet of MAC layer, and the pseudo-random sequence in the pseudo random sequence part is obtained according to the corresponding absolute frequency point call number of the free time frequency point；After the UE receives the detectable signal on the PDSCH, the corresponding ACK/NACK information of Xiang Suoshu base station feedback；The base station determines whether the idle frequency point can occupy according to the ACK/NACK information.Using the present invention can the availability to the idle frequency spectrum perceived accurately detected.
Description
Technical field
The present invention relates to mobile communication technologies, more particularly to a kind of frequency spectrum perception detection method and system.
Background technique
With flourishing for the continuous development and mobile Internet and Internet of Things industry for wirelessly communicating new technology, respectively
Demand of the radio traffic to radio-frequency spectrum sharply expands, and frequency spectrum resource is increasingly in short supply.Traditional fixed allocation private network frequency
Way to manage have exclusiveness, due to the business feature of industry user, this mode be easy to cause trade Special Network wireless frequency spectrum
Utilization rate it is relatively low, frequency spectrum resource is underutilized, and there are a degree of wastes.Frequency spectrum share can break frequency
The exclusiveness of spectrum occupies, and is opened to more usable spectrum resources, becomes a kind of promotion wireless frequency spectrum utilization rate of great potential
Scheme.
It realizes and shares between the system of frequency spectrum, need to carry out frequency spectrum perception to shared frequency point, monitor the use of shared frequency point
Situation is occupied and is exited in time according to own service feature.
Traditional frequency spectrum perception technology includes energy measuring, matched filtering detection, Cyclic Spectrum detection, awareness technology.
These traditional frequency spectrum perception technologies just start to occupy the frequency point after perceiving idle frequency point.It is usual when due to frequency spectrum perception
It is to determine whether frequency spectrum resource can be used as standard using fixed index, in this way, will lead to root according to the energy on frequency spectrum resource
Being unable to ensure actual transmission quality according to the signal-to-noise ratio that can occupy idle frequency spectrum resource determined by perception, (i.e. the bit error rate can compare
It is high), it will lead to the utilization rate decline of occupied frequency spectrum resource in this way.
Due to as it can be seen that traditional frequency spectrum perception technology will lead to the erroneous judgement of certain probability, and then the reduction availability of frequency spectrum.
Summary of the invention
In view of this, the main purpose of the present invention is to provide a kind of frequency spectrum perception detection method and system, it can be to institute
The availability of the idle frequency spectrum of perception is accurately detected.
In order to achieve the above object, technical solution proposed by the present invention are as follows:
A kind of frequency spectrum perception detection method, comprising:
For the idle frequency point currently perceived, base station is using Physical Downlink Shared Channel PDSCH in the free time frequency point
For upper transmission detectable signal to user equipment (UE), the detectable signal includes MAC header part and the part pseudo-random sequence PN, wherein
The MAC header is divided into the information for being used to indicate that notebook data packet is the useless packet of MAC layer, in the pseudo random sequence part it is pseudo- with
Machine sequence is obtained according to the corresponding absolute frequency point call number of the free time frequency point；
After the UE receives the detectable signal on the PDSCH, the corresponding ACK/NACK of Xiang Suoshu base station feedback
Information；
The base station determines whether the idle frequency point can occupy according to the ACK/NACK information.
A kind of frequency spectrum perception detection system, comprising:
Base station, for the idle frequency point currently perceived, using Physical Downlink Shared Channel PDSCH in free time frequency
Detectable signal is sent on point to user equipment (UE), the detectable signal includes MAC header part and the part pseudo-random sequence PN,
In, the MAC header is divided into the information for being used to indicate that notebook data packet is the useless packet of MAC layer, in the pseudo random sequence part
Pseudo-random sequence is obtained according to the corresponding absolute frequency point call number of the free time frequency point；According to the ACK/NACK letter of UE feedback
Breath, determines whether the idle frequency point can occupy；
User equipment, after receiving the detectable signal on the PDSCH, Xiang Suoshu base station feedback is corresponding
ACK/NACK information.
In conclusion frequency spectrum perception detection method proposed by the present invention and system, by being sent out on the idle frequency point of perception
Detectable signal is sent, and determines idle frequency point if appropriate for this system application, Ke Yizhun according to the ACK/NACK information of the feedback of UE
Really detect whether the idle frequency point perceived is able to satisfy user's transmission quality needs, so that it is guaranteed that frequency spectrum resource obtains sufficiently
It utilizes.
Detailed description of the invention
Fig. 1 is the frequency spectrum perception detection method flow diagram of the embodiment of the present invention one；
Fig. 2 is the frequency spectrum perception detection system structure of the embodiment of the present invention one.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, right below in conjunction with the accompanying drawings and the specific embodiments
The present invention is described in further detail.
Core of the invention thought is: utilizing Physical Downlink Shared Channel (PDSCH) in the idle frequency point of perception by base station
The upper transmission for carrying out detectable signal, UE receives PDSCH, and carries out the feedback of ACK/NACK, and base station is determined according to feedback should
Idle frequency point is if appropriate for this system application.In this way, by sending the detectable signal detected dedicated for idle frequency spectrum, Ke Yiyou
Effect determines the transmission quality of its information according to corresponding ACK/NACK information, so as to determine idle frequency spectrum according to the result
Whether resource is able to satisfy user's transmission quality needs, it is ensured that frequency spectrum resource is fully used.
Fig. 1 is the frequency spectrum perception detection method flow diagram of the embodiment of the present invention one, as shown in Figure 1, embodiment master
Include:
Step 101, the idle frequency point for currently being perceived, base station are existed using Physical Downlink Shared Channel (PDSCH)
Detectable signal is sent on the free time frequency point to user equipment (UE), the detectable signal includes MAC header part and pseudo-random sequence PN
Part, wherein the MAC header is divided into the information for being used to indicate that notebook data packet is the useless packet of MAC layer, the pseudo-random sequence portion
Pseudo-random sequence in point is obtained according to the corresponding absolute frequency point call number of the free time frequency point.
In this step, the channel quality of idle frequency point will be known using sending for detectable signal.Here with existing system
Detectable signal the difference is that needing exist for generating the medium access control head (MAC) point, which will be used to indicate this number
It is the information of the useless packet of MAC layer according to packet.Effect in this step in view of detectable signal is that triggering UE feeds back corresponding ACK/
Nack message does not need to handle entrained information, therefore, needs exist for generating MAC header part, to indicate notebook data
Packet is the useless packet of MAC layer.In this way, the MAC layer of UE can ignore this detectable signal, that is, do not need to handle it, thus
It can be to avoid the influence of the normal MAC layer business stream process to UE.In addition, in this step, PN code sequence in the part PN according to
The free time corresponding absolute frequency point call number of frequency point obtains, in this way, PN will be associated from different subband signals, so as to
Lower peak-to-average force ratio is obtained, the probability of signal distortion is reduced, enhances the demodulation performance of signal, so as to ensure the accurate of signal
Property.
Preferably, the MAC header part can occupy 1 byte.
Preferably, the part the PN can be the pseudo-random sequence c (n) of the N number of bit of length, wherein can be according to
Obtain the c (n).
In above-mentioned formula, for generating x1First m-sequence initialization of register of () is x1(0)=1, x1(n)=0, n
=1,2 ..., 30；For generating x2Second m-sequence initialization of register of () beThe cinit
It will be according to:It obtains, the SubBandIndex is
The free time corresponding absolute frequency point call number of frequency point, is cell ID, NCFor the value initial position of pseudo-random sequence,
NC=1600.According to each bit on the formula left side by each bit (i.e. x with the right2(0)
~x2(30)) it respectively corresponds, so as to obtain x2(0)~x2(30) value.As previously mentioned, will using above method c (n)
The corresponding c (n) of SubBandIndex associated with SubBandIndex that is, different is different, so as to ensure system
Peak-to-average force ratio it is low, and then ensure the demodulation performance of detectable signal.
Preferably, the N=32.I.e. pseudo random sequence part occupies 4 bytes.
After step 102, the UE receive the detectable signal on the PDSCH, Xiang Suoshu base station feedback is corresponding
ACK/NACK information.
The those skilled in the art that are implemented as of this step are grasped, and details are not described herein.
Step 103, the base station determine whether the idle frequency point can occupy according to the ACK/NACK information.
This step will can know the channel quality of the idle frequency point according to the ACK/NACK information, so as to
According to current channel quality target, to judge whether the free time frequency point can be used.It is specific to determine that method is those skilled in the art
It is grasped, details are not described herein.
Fig. 2 is the frequency spectrum perception detection system structure corresponded to the above method, as shown in Fig. 2, the system packet
It includes:
Base station, for the idle frequency point currently perceived, using Physical Downlink Shared Channel PDSCH in free time frequency
Detectable signal is sent on point to user equipment (UE), the detectable signal includes MAC header part and the part pseudo-random sequence PN,
In, the MAC header is divided into the information for being used to indicate that notebook data packet is the useless packet of MAC layer, in the pseudo random sequence part
Pseudo-random sequence is obtained according to the corresponding absolute frequency point call number of the free time frequency point；According to the ACK/NACK letter of UE feedback
Breath, determines whether the idle frequency point can occupy.
Preferably, the MAC header part can occupy 1 byte.
The PN code sequence can be the pseudo-random sequence c (n) that length is N number of bit, can be according to
The c (n) is obtained, it is described
The SubBandIndex is the sky
The corresponding absolute frequency point call number of ideler frequency point is cell ID, NCFor the value initial position of pseudo-random sequence, NC=
1600.Preferably, the N is 32.
User equipment, after receiving the detectable signal on the PDSCH, Xiang Suoshu base station feedback is corresponding
ACK/NACK information；
In conclusion the above is merely preferred embodiments of the present invention, being not intended to limit the scope of the present invention.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (8)
1. a kind of frequency spectrum perception detection method characterized by comprising
For the idle frequency point currently perceived, base station is sent out on the free time frequency point using Physical Downlink Shared Channel PDSCH
Send detectable signal to user equipment (UE), the detectable signal includes MAC header part and the part pseudo-random sequence PN, wherein described
MAC header is divided into the information for being used to indicate that notebook data packet is the useless packet of MAC layer, and the pseudo-random sequence in the part PN is according to institute
The corresponding absolute frequency point call number of idle frequency point is stated to obtain；
After the UE receives the detectable signal on the PDSCH, the corresponding ACK/NACK information of Xiang Suoshu base station feedback；
The base station determines whether the idle frequency point can occupy according to the ACK/NACK information.
2. the method according to claim 1, wherein the MAC header part occupies 1 byte.
3. the method according to claim 1, wherein the pseudo-random sequence is the stochastic ordering of the N number of bit of length
It arranges c (n), wherein according toObtain the c
(n), describedThe SubBandIndex is institute
The corresponding absolute frequency point call number of idle frequency point is stated,For cell ID, NCFor the value initial position of pseudo-random sequence, NC
=1600.
4. according to the method described in claim 3, it is characterized in that, the N is 32.
5. a kind of frequency spectrum perception detection system characterized by comprising
Base station, for the idle frequency point currently perceived, using Physical Downlink Shared Channel PDSCH on the free time frequency point
Detectable signal is sent to user equipment (UE), the detectable signal includes MAC header part and the part pseudo-random sequence PN, wherein institute
State MAC header and be divided into the information for being used to indicate that notebook data packet is the useless packet of MAC layer, the pseudo-random sequence in the part PN according to
The free time corresponding absolute frequency point call number of frequency point obtains；According to the ACK/NACK information that the UE is fed back, the sky is determined
Whether ideler frequency point can occupy；
User equipment, after receiving the detectable signal on the PDSCH, the corresponding ACK/ of Xiang Suoshu base station feedback
Nack message.
6. system according to claim 5, which is characterized in that the MAC header part occupies 1 byte.
7. system according to claim 5, which is characterized in that the pseudo-random sequence is the stochastic ordering of the N number of bit of length
It arranges c (n), wherein according toObtain the c
(n), describedThe SubBandIndex is institute
The corresponding absolute frequency point call number of idle frequency point is stated,For cell ID, NCFor the value initial position of pseudo-random sequence, NC
=1600.
8. system according to claim 7, which is characterized in that the N is 32.
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| JP2001352315A (en) * | 2000-04-10 | 2001-12-21 | Hyundai Electronics Ind Co Ltd | Data processing method for hybrid automatic repeat for request 2/3 system in downlink of broadband wireless communication system |
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| CN102202326A (en) * | 2011-05-30 | 2011-09-28 | 上海华为技术有限公司 | Detection method, detection control apparatus for uplink feedback signaling, and base station |
| CN103167616A (en) * | 2011-12-19 | 2013-06-19 | 鼎桥通信技术有限公司 | Method of generating channel quality indicator (CQI) information through multi-carrier user (UE) |
| CN104105099A (en) * | 2013-04-07 | 2014-10-15 | 电信科学技术研究院 | Dynamic spectrum allocation method and device |
-
2014
- 2014-12-25 CN CN201410822259.4A patent/CN105790865B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001352315A (en) * | 2000-04-10 | 2001-12-21 | Hyundai Electronics Ind Co Ltd | Data processing method for hybrid automatic repeat for request 2/3 system in downlink of broadband wireless communication system |
| CN1677914A (en) * | 2004-03-31 | 2005-10-05 | 埃沃柳姆公司 | Device and method for management of the transmission of blocks of data in an HS-DSCH downlink channel of a mobile communications network |
| CN102202326A (en) * | 2011-05-30 | 2011-09-28 | 上海华为技术有限公司 | Detection method, detection control apparatus for uplink feedback signaling, and base station |
| CN103167616A (en) * | 2011-12-19 | 2013-06-19 | 鼎桥通信技术有限公司 | Method of generating channel quality indicator (CQI) information through multi-carrier user (UE) |
| CN104105099A (en) * | 2013-04-07 | 2014-10-15 | 电信科学技术研究院 | Dynamic spectrum allocation method and device |
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Denomination of invention: A spectrum sensing detection method and system Effective date of registration: 20200730 Granted publication date: 20190322 Pledgee: Bank of Beijing Limited by Share Ltd. Century City Branch Pledgor: POTEVIO INFORMATION TECHNOLOGY Co.,Ltd. Registration number: Y2020980004562 |
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Date of cancellation: 20210715 Granted publication date: 20190322 Pledgee: Bank of Beijing Limited by Share Ltd. Century City Branch Pledgor: POTEVIO INFORMATION TECHNOLOGY Co.,Ltd. Registration number: Y2020980004562 |
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Granted publication date: 20190322 Termination date: 20211225 |