CN107911827A - R-T unit and its frequency spectrum access control method - Google Patents
R-T unit and its frequency spectrum access control method Download PDFInfo
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- CN107911827A CN107911827A CN201711222088.1A CN201711222088A CN107911827A CN 107911827 A CN107911827 A CN 107911827A CN 201711222088 A CN201711222088 A CN 201711222088A CN 107911827 A CN107911827 A CN 107911827A
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- threshold value
- unlicensed spectrum
- feedback information
- energy measuring
- measuring threshold
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention provides a kind of R-T unit and its frequency spectrum access control method, this R-T unit and unlicensed spectrum can be used.And this frequency spectrum access control method comprises the following steps.R-T unit receives the feedback information on accessing this unlicensed spectrum, adjusts energy measuring threshold value according to this feedback information, and judge whether access unlicensed spectrum according to this energy measuring threshold value.If it is more than this energy measuring threshold value, access of the R-T unit forbidden energy to unlicensed spectrum in signal strength detected on unlicensed spectrum.If not being more than this energy measuring threshold value in detected signal strength on unlicensed spectrum, R-T unit carries out the access of unlicensed spectrum.Thereby, the chance that data transfer collides can be reduced, can also lift the service efficiency of unlicensed spectrum.
Description
Technical field
The present invention relates to a kind of provided for radio resources management, more particularly to a kind of R-T unit and its frequency spectrum access control side
Method.
Background technology
Since the demand and handling capacity of mobile network's (for example, the third generation (3G), forth generation (4G) mobile communication etc.) are quick
Growth, promotes Telecom operators to seek more multiple spectra or adds base station.For usable spectrum, Fig. 1, Telecom operators are refer to
Frequency spectrum (licensed spectrum) is authorized to obtain except that can be authorized by competent authority of official, can also utilize unauthorized frequency
Spectrum (unlicensed spectrum) and provide load shedding (offload) or carrier wave gathers in due course for the transmission on mandate frequency spectrum
Close (Carrier Aggregation, CA).Although there may be many other mechanicss of communication (for example, Wi- in unlicensed spectrum
Fi, bluetooth (Bluetooth) etc.) signal, but mobile network's relevant criterion has been presented for first listening and send (Listen Before afterwards
Talk, LBT) mechanism, to be effectively prevented from colliding.For example, it is based on third generation cooperative programme (Third Generation
Partnership Project, 3GPP) advanced Long Term Evolution (Long Term Evolution-Advanced, LTE-A)
LTE, which is authorized, in professional version (pro) R13/R14 standards assists access (Licensed Assisted Access, LAA)/enhancing to award
Power assists access (Enhanced Licensed Assisted Access, eLAA) technology, user's equipment (User
Equipment, UE) with base station (Base Station, BS) before unlicensed spectrum is accessed, in order to avoid with unlicensed spectrum
The transmitted signal of other upper devices collides, and user's equipment can first carry out carrier wave with base station on unlicensed spectrum
Energy measuring (energy detection).If it is higher than energy measuring threshold in signal strength measured on unlicensed spectrum
It is worth (energy detection threshold), user's equipment can assert that this unlicensed spectrum is busy with base station
(Busy) state and wait.Conversely, if in signal strength detected on unlicensed spectrum not higher than energy measuring door
Threshold value, user's equipment then assert that this unlicensed spectrum is idle (Idle) state with base station, and when this unlicensed spectrum is held
Continue for idle state when, this unlicensed spectrum can be used to carry out uplink/downlink (uplink/ in user's equipment and base station
Downlink) data transfer.And aforementioned mechanism is idle channel assessment (Clear Channel Assessment, CCA) journey
Sequence.
It follows that can energy measuring threshold value is UE and BS access unlicensed spectrum to carry out uplink/downlink data biography
Defeated important evaluation condition.However, in the prior art, UE and BS can only be commented using single default energy measuring threshold value
Estimate and whether access unlicensed spectrum.With the use of unlicensed spectrum or the change of quality condition, single preset energy detects door
Threshold value probably causes that bandwidth is idle for too long or data transfer collides.Therefore, the access mechanism of existing unlicensed spectrum needs to change
It is good.
The content of the invention
In view of this, the present invention provides a kind of R-T unit and its frequency spectrum access control method, it is adapted dynamically energy
Threshold value is detected, so as to efficiently use unlicensed spectrum and avoid being collided in its transmission data.
The frequency spectrum access control method of the present invention, it is suitable for the R-T unit using unlicensed spectrum.This frequency spectrum accesses
Control method comprises the following steps.Receive the feedback information on accessing this unlicensed spectrum.Energy is adjusted according to this feedback information
Amount detection threshold value.Judge whether to access unlicensed spectrum according to this energy measuring threshold value.If in being examined on unlicensed spectrum
The signal strength measured is more than this energy measuring threshold value, then access of the forbidden energy to unlicensed spectrum；If on unlicensed spectrum
Detected signal strength is not more than this energy measuring threshold value, then carries out the access of unlicensed spectrum.
On the other hand, R-T unit of the invention includes receiving circuit, transmitting circuit and process circuit.Receiving circuit to
Signal is received via unlicensed spectrum.Transmitting circuit transmits signal via unlicensed spectrum.And process circuit coupling receiving circuit
And transmitting circuit, and be configured to perform the following steps.Receive the feedback information on accessing this unlicensed spectrum.According to this
Feedback information adjusts energy measuring threshold value.Judge whether to access unlicensed spectrum according to this energy measuring threshold value.If in not
Signal strength detected on frequency spectrum is authorized to be more than this energy measuring threshold value, then access of the forbidden energy to unlicensed spectrum；If
It is not more than this energy measuring threshold value in detected signal strength on unlicensed spectrum, then unauthorized is carried out by transmitting circuit
The access of frequency spectrum.
Based on above-mentioned, since feedback information would generally receive after once transmitting, the transmitting-receiving of the embodiment of the present invention
Device just can be based on receiving feedback information (such as, if having correctly received or the information such as channel condition) dynamically adjust energy
Detect threshold value so that avoid transmission data collided or the unlicensed spectrum free time too long situations such as.In addition, apply feelings at some
In border, frequently adjusting energy measuring threshold value probably can cause device power consumption, and the embodiment of the present invention also can receive ACK in continuous several times
In the case of, just perform the increase adjustment of energy measuring threshold value.
To make the foregoing features and advantages of the present invention clearer and more comprehensible, special embodiment below, and it is detailed to coordinate attached drawing to make
Carefully it is described as follows.
Brief description of the drawings
Fig. 1 is existing unlicensed spectrum and the schematic diagram used for authorizing frequency spectrum；
Fig. 2 is the schematic diagram of the communication system according to one embodiment of the invention；
Fig. 3 A are the element block diagrams of user's equipment according to one embodiment of the invention；
Fig. 3 B are the element block diagrams of the base station according to one embodiment of the invention；
Fig. 4 is the flow chart of the frequency spectrum access control method according to one embodiment of the invention；
Fig. 5 is that an example illustrates base station access unlicensed spectrum to carry out the flow chart of downlink data transmission；
Fig. 6 is that an example illustrates user's equipment access unlicensed spectrum to carry out the flow chart of transmitting uplink data.
Drawing reference numeral explanation：
1：Communication system
100：User's equipment
200：Base station
110、210：Antenna
120、220：Receiving circuit
130、230：Transmitting circuit
140、240：Simulate to numeral/digital to analog converter
160、260：Memory
161、261：Physical layer
162、262：Media access layer
163、263：Radio resource controller layer
170、270：Process circuit
S410~S430, S510~S590, S610~S690：Step
Embodiment
Fig. 2 is the schematic diagram of the communication system 1 according to one embodiment of the invention.Fig. 2 is refer to, communication system 1 at least wraps
Include but be not limited only to user's equipment 100 and base station 200.User's equipment 100 and 200 system of base station use mobile (or bee
Nido (cellular)) communication network (for example, 3G, 4G, even more high generation mobile network).
User's equipment 100 may have numerous embodiments, such as can be including (but not limited to) movement station, advanced movement station
(Advanced Mobile Station；AMS), telephone device, customer premises equipment (Customer Premise
Equipment, CPE), wireless sensor etc..
Fig. 3 A are the element block diagrams for illustrating user's equipment 100 according to one embodiment of the invention, and user's equipment 100 can
Including at least (but not limited to) antenna 110, receiving circuit 120, transmitting circuit 130, simulation to digital (A/D)/numeral to simulation
(D/A) converter 140, memory 160 and process circuit 170.
Receiving circuit 120 and transmitting circuit 130 respectively to by antenna 110 wirelessly via authorizing frequency spectrum and/or not
Frequency spectrum is authorized to receive downlink (downlink) signal and transmission uplink (uplink) signal.It is worth noting that, award
All frequency bands included by power frequency spectrum are all to need related organ to license, for example, 900,1800 megahertz (MHz) frequency ranges
Deng.And all frequency bands included by unlicensed spectrum need not be authorized i.e. for popular free use.For example, 2.4,50
Industrial scientific medicals such as hundred million hertz (GHz) (Industrial Scientific Medical) frequency range.Receiving circuit 120 and biography
Power transmission road 130 also can perform such as low noise amplification, impedance matching, mixing, raising frequency or frequency reducing conversion, filtering, amplification and its class
Operated like the analog signal processing of person.Simulation to numeral/digital to analog converter 140 is configured at down link signal
Digital signals format is converted to from analog signal format during reason, and from digital signals format during uplink signal processing
Be converted to analog signal format.
Memory 160 can be fixed or movable random access memory (the Random Access of any mode
Memory, RAM), read-only storage (Read-Only Memory, ROM), flash memory (Flash Memory) or similar member
The combination of part or said elements.160 logging program code of memory, device configuration, code book (Codebook), buffering or it is permanent
Data, and record such as radio resource control (Radio Resource Control, RRC) layer, medium plan
Other various communications protocol related software moulds such as (Media Access Control, MAC) layer (or media access layer), physical layer
Block.
Process circuit 170 is configured to processing digital signal and performs the program of exemplary embodiments according to the present invention,
And it can access or be loaded into 160 recorded data of memory and software module.The function of process circuit 170 can be by using such as
CPU, microprocessor, microcontroller, Digital Signal Processing (Digital Signal Processing, DSP) chip, field can journeys
The programmable units such as sequence logic gate array (Field Programmable Gate Array, FPGA) are implemented.Processing electricity
The function on road 170 also can use independent electronic or integrated circuit (Integrated Circuit, IC) to implement, and process circuit
170 operation can also be realized with software.
Base station 200 may have numerous embodiments, such as can be including (but not limited to) family expenses evolved node B (Home
Evolved Node B, HeNB), eNB, advanced base station (Advanced Base Station, ABS), based transceiver system
(Base Transceiver System；BTS), repeater (relay), transponder (repeater), and/or satellite-based
Communicate base station.
Fig. 3 B are the element block diagrams for illustrating base station 200 according to one embodiment of the invention, and base station 200 can include at least
(but not limited to) antenna 210, receiving circuit 220, transmitting circuit 230, simulation to digital (A/D)/numeral to simulation (D/A) conversion
Device 240, memory 260 and process circuit 270.
The function of each element of base station 200 will be directed to 100 corresponding element of user's equipment the same as or similar to earlier figures 3A
The description of part, and therefore will not repeat detailed description to each element.And be with the difference of user's equipment 100, connect
Circuit 220 and transmitting circuit 230 are received respectively receiving uplink signal and transmission down link signal.And simulate to number
Word/digital to analog converter 240 is configured to be converted to numeral from analog signal format during uplink signal processing
Signal format, and during down link signal processing analog signal format is converted to from digital signals format.
To facilitate understanding of the present embodiment of the invention operating process, below will that the present invention will be described in detail be real for many embodiments
Apply user's equipment 100 and the operation workflow of base station 200 in example.
Fig. 4 is the flow chart for illustrating frequency spectrum access control method according to one embodiment of the invention.It refer to Fig. 4, this implementation
User equipment 100 and base station 200 of the method for example under communication system Fig. 21.Hereinafter, first collocation is used
Method described in each item and the module declaration embodiment of the present invention of person's equipment 100.Each flow of this method can be according to reality
Apply situation and adjust therewith, and be not limited to that.
The process circuit 170 of user's equipment 100 receives the feedback on accessing unlicensed spectrum by receiving circuit 120
Information (step S410).Specifically, it is assumed that process circuit 170 is sent by transmitting circuit 130 via unlicensed spectrum to be believed
Breath (that is, accesses unlicensed spectrum), and process circuit 170 can be received by receiving circuit 120 (via unauthorized or authorizing frequency spectrum)
On the feedback information that whether is properly received using the transmission of this unlicensed spectrum (for example, hybrid automatic repeat request (Hybrid
Automatic Repeat-reQuest, HARQ) confirmation (Acknowledgement, the ACK) information of mechanism and unconfirmed
(Non-Acknowledgement, NACK) information or other reception configured informations).Alternatively, process circuit 170 can be by connecing
Receive circuit 120 and perform measurement (measurement) program in unlicensed spectrum, to obtain the channel condition on unlicensed spectrum
(for example, received signal strength indicator (Received Signal Strength Indication, RSSI), reception signal receive
Power, received signal quality etc.) feedback information.This feedback information is also probably including other information, but needs to have and does not award
The channel case (for example, signal strength, quality, code used etc.) or service condition of power frequency spectrum are (for example, number of devices, resource
Distribution condition etc.) etc. relevant information.
Process circuit 170 is obtained after feedback information, you can adjusts energy measuring threshold value (step according to this feedback information
Rapid S420).Specifically, the collision in part communications protocol institute specification avoids (Collison Avoidance, CA) mechanism (example
Such as, Carrier-Sense Multiple Access/collision avoids (Carrier Sense Multiple Access/Collison
Avoidance, CSMA/CA), first listen and send afterwards (LBT) etc.) in, before device is intended to transmit, can first sense channel whether be idle shape
State.In passage it is evaluated be idle condition after, this device can just be transmitted that (Partial Mechanism can also shake hands
(handshake) program confirms).And during judging whether passage is idle condition, it will usually by energy measuring door
Threshold value (or idle channel assessment threshold value) is used as the foundation judged.If the signal strength detected is more than this energy measuring
Threshold value, the then passage to be judged can determine that as busy condition；Conversely, if the signal strength detected is not more than this energy measuring
Threshold value, the then passage to be judged can determine that as idle condition.
In the prior art, energy measuring threshold value is typically to remain unchanged after initializing set.And the present invention is real
It is then that can carry out elastic adjustment energy measuring threshold value according to the feedback information previously with regard to access unlicensed spectrum to apply example, and foundation
The different content of feedback information and different adjustment modes are provided.In one embodiment, it is assumed that feedback information is not awarded on using
Whether the transmission of power frequency spectrum is properly received；If feedback information be not properly received on the transmission using unlicensed spectrum (for example,
Feedback information system nack message), then process circuit 170 can reduce energy measuring threshold value；And if feedback information is on using
The transmission of unlicensed spectrum is properly received (for example, feedback information system ACK information), then process circuit 170 can increase energy measuring
Threshold value.In addition, in order to reduce frequently adjustment energy measuring threshold value (for example, power consumption is considered), in certain embodiments, if even
It is that the reception number on being properly received using the transmission of unlicensed spectrum is more than number threshold value (example that feedforward information is withdrawn in continued access
Such as, 3,5 is inferior), process circuit 170 can just increase energy measuring threshold value.If it is on using not continuously to receive feedback information
The reception number that the transmission of frequency spectrum is properly received is authorized not to be more than number threshold value, then process circuit 170 can maintain energy measuring
Threshold value.And if foregoing reception number is reaching in the special time section (for example, 800 milliseconds, 1 second, 5 seconds etc.) after 1 time
Feedback information is not received, this reception number may be zeroed by process circuit 170, with fast in response to the state in unlicensed spectrum
Speed change.
It should be noted that the mechanism of foregoing adjustment energy measuring threshold value may also have many kinds, for example, no matter a certain
Whether feedback information is to continuously receive, if special time in add up reception number arrival or special time in ACK and
It is that adjustment energy measuring threshold value etc. is such that the reception number of one, which is more than another one, in NACK, and it is of the invention in fact that end regards application
Apply the demand of a person and voluntarily adjust, the present invention is not any limitation as.
In another embodiment, it is assumed that feedback information be on acquired by foregoing process of measurement channel condition (for example,
RSSI, received signal quality etc.)；If the numerical value of feedback information is less than and compares threshold value (for example, RSSI is less than -80 decibel milliwatts
(dBm), received signal quality is less than -70 decibels (dB) etc.), then process circuit 170 can reduce energy measuring threshold value；And if return
Feedforward information is not less than and compares threshold value, then process circuit 170 can increase energy measuring threshold value.In addition, process circuit 170 also may be used
Mechanism is added up using foregoing reception number to reduce the number of adjustment energy measuring threshold value, and so on, seldom repeated in this.
It should be noted that the content of feedback information be also possible to be other represent unlicensed spectrums state information, and its
The foundation for adjusting energy measuring threshold value may be different, for example, high transfer rate coding is (for example, 64- orthogonal amplitude modulating and changings
(Quadrature Amplitude Modulation, QAM), 256-QAM), number of devices few (for example, one, three etc.) etc.
Situation can increase energy measuring threshold value；On the contrary then reduction energy measuring threshold value.
Then, before next time transmits, process circuit 170 will judge whether that access is not awarded according to this energy measuring threshold value
Weigh frequency spectrum (step S430).If process circuit 170 is by receiving circuit 120 and strong in signal detected on unlicensed spectrum
Degree is more than this energy measuring threshold value, then access of the forbidden energy (or deactivation) to unlicensed spectrum is (for example, forbidden energy is in unlicensed spectrum
The transmission of upper signal)；If not being more than this energy measuring threshold value in detected signal strength on unlicensed spectrum, carry out not
Authorize the access of frequency spectrum.It is worth noting that, the energy measuring threshold value of the embodiment of the present invention can be adjusted, if energy measuring door
Threshold value is increased, then (process circuit 170 judges unlicensed spectrum system free time shape to the chance of relatively increase access unlicensed spectrum
The chance increase of state), and improve unlicensed spectrum service efficiency；Conversely, energy measuring threshold value is reduced, then relatively reduce
The chance (process circuit 170 is judged to authorizing the chance increase of frequency spectrum system busy condition) of unlicensed spectrum is accessed, and reduces number
According to collision opportunity.Abovementioned steps S410 to S430 is repeated, and can reach the function that dynamic adjusts energy measuring threshold value.
And it generally can refer to the foregoing collocation of user's equipment 100 Fig. 4 for the frequency spectrum access control method of base station 200
Explanation.It is with previous embodiment difference, the feedback information of base station 200 may be that user's equipment 100 is returned
Channel status information (Channel State Information, CSI) (including channel quality instruction (Channel
Quality Indicator, CQI), pre-coding matrix instruction (Precoding Matrix Indicator, PMI) and order instruction
(Rack Indicator, RI) etc.) or other indicating the information of channel condition.And in the step s 420, base station 200
Process circuit 270 is then that can just increase energy measuring door when CQI indexes are more than corresponding comparison threshold value or receive PMI and RI
Threshold value, on the contrary then reduction energy measuring threshold value.
, can be by if there is several downlink data transmissions to be intended to carry out at the same time in addition, when considering the scheduling of multiple user's equipment
Following three considers purpose and energy measuring threshold value is adjusted to different value respectively.If in order to avoid occurring on unlicensed spectrum
Collision situation, then process circuit 270 the energy measuring threshold value in current scheduling can be set to all downlink data transmissions (i.e.,
All user's equipment 100) in minimum value.If in order to avoid wasting unlicensed spectrum, process circuit 270 is by current scheduling
In energy measuring threshold value be set to maximum in all downlink data transmissions.If in addition, in order to consider foregoing two kinds at the same time
Situation, then process circuit 270 the energy measuring threshold value in current scheduling can be also set to flat in all downlink data transmissions
Average.It should be noted that in other embodiment, other statistical indicators such as median, mode can act as energy measuring threshold
The adjustment foundation of value.
Then, the spirit of the embodiment of the present invention is more understood in order to facilitate reader, will separately lift two situation example explanations below.
First application situation system, in assistance access (Licensed Assisted Access, LAA) technology is authorized, base
Platform 200 accesses unlicensed spectrum to carry out downlink data transmission.Refer to Fig. 5, it is assumed that the memory 260 of base station 200 to
Few record has the software module of physical layer 261, media access layer 262 and radio resource controller layer 263, and (can be processed circuit
270 access and are loaded into).Radio resource controller layer 263 sends radio bearer configuration to indicate to service to media access layer 262
Quality (Quality of Service, QoS) (step S510).And then foundation has downlink bandwidth requirements to media access layer 262
The CQI that is returned of user's equipment 100 adjust the energy measuring threshold value of each user's equipment 100 respectively as initially setting
Fixed (step S520), and this energy measuring threshold value is become entrained in into downlink configuration request (Downlink Configuration
Request, DL_CFG_REQ) to inform physical layer 261 (step S530).It should be noted that foregoing initial setting can be according to
Mesh is considered according to difference and is set as the maximum in all downlink data transmissions, minimum value, average value or any other value.
Then, base station 200 can be based on LBT mechanism and in carrying out carrier energy detection on unlicensed spectrum, and according to step
The energy measuring threshold value of rapid S520 settings is to determine whether access unlicensed spectrum (step S540).Assuming that judging result system can
Unlicensed spectrum is accessed, then base station 200 carries out downlink data transmission (step S550) in unlicensed spectrum.And user's equipment
100 receive can be by HARQ mechanism feeding back ACK or nack message, to inform that base station 200 this time passes after downlink data transmission
It is defeated whether to be properly received；Alternatively, the CSI such as user's equipment 100 feedback CQI, RI, PMI, to inform 200 current channel of base station
Whether condition is good.And physical layer 261 then using feedback information as control information indicate, and by this control information indicate and other
Data instruction notice gives media access layer 262 (step S560, S570).Foregoing instruction circulate superfluous by media access layer 262
It is remaining check (Cyclic Redundancy Check, CRC) to verify the correctness (step S580) of data after, you can foundation
ACK information, nack message or the CSI of feedback information transmit energy measuring threshold value (step used to estimate and adjust next time
S590), CCA programs are carried out and according to the energy measuring threshold value after adjustment.In addition, when there are several user's equipment 100
Downlink data need access unlicensed spectrum when, in order to avoid colliding, base station 200 can be from these user's equipment
Least energy detection threshold value is selected in 100 and is used as energy measuring threshold value used in current transmission, subsequently to be carried
Wave energy detection, CCA programs and downlink data transmission (that is, repeat step S540, S550), until base station 200 does not access
Just stop foregoing routine during the demand of unlicensed spectrum.
Second application situation system, in LAA technologies, user's equipment 100 accesses unlicensed spectrum to carry out upstream data
Transmission.It refer to Fig. 6, it is assumed that the memory 160 of user's equipment 100, which at least records, physical layer 161, media access layer 162
And the software module of radio resource controller layer 163 (circuit 170 that can be processed is accessed and is loaded into).Same or similar step in Fig. 6
Suddenly the explanation that step is corresponded in Fig. 5 is can refer to, is repeated no more in this.And it is with the application situation difference of Fig. 5, user
Equipment 100 may arbitrarily be selected or select an energy measuring threshold according to the received signal strength acquired by process of measurement
Value is come as initial setting (step S620).And the transmitting uplink data that 200 system of base station reacts on step S650 carrys out feedback ACK
Or nack message, physical layer 161 is provided the feedback information (step S660) of HARQ related control informations instruction, and deposit media
Layer 162 is taken according to feedback information to estimate and adjust energy measuring threshold value (step S690).
It should be noted that previous embodiment is both for the user's equipment 100 and base station using mobile communication network
200, so in other embodiment, foregoing frequency spectrum access control method also can be applicable to other and mandate frequency spectrum and unauthorized can be used
The wireless transmitter of both frequency spectrums (is probably using the mechanics of communication beyond mobile communication network, for example, radar, audio-visual machine
Upper box, wireless router etc.), but notably its feedback information and the details palpus foundation of adjustment energy measuring threshold value apply situation
And adjust.
Believe in conclusion the R-T unit (for example, base station, user's equipment etc.) of the embodiment of the present invention can be based on feedback
Cease dynamically to adjust energy measuring threshold value, deposited with the state in time according to unlicensed spectrum to increase or decrease R-T unit
The chance of unlicensed spectrum is taken, so as to avoid the free time of data collision or unlicensed spectrum long and unused.It is in addition, logical
Overwriting continuously receives the reception number of the feedback information of identical content, can be into reduce frequently adjustment energy measuring threshold value
One step saves power consumption.
Although the present invention is disclosed as above with embodiment, so it is not limited to the present invention, any technical field
Middle technical staff, without departing from the spirit and scope of the present invention, when can make a little change with retouching, therefore the present invention protection
Subject to scope ought be defined depending on claim.
Claims (15)
1. a kind of frequency spectrum access control method, it is characterised in that the R-T unit suitable for using unlicensed spectrum, and the frequency
Spectrum access control method includes：
Receive the feedback information on accessing the unlicensed spectrum；
Energy measuring threshold value is adjusted according to the feedback information；And
Judge whether to access the unlicensed spectrum according to the energy measuring threshold value, if wherein on the unlicensed spectrum
Detected signal strength is more than the energy measuring threshold value, then access of the forbidden energy to the unlicensed spectrum, if in institute
State detected signal strength on unlicensed spectrum and be not more than the energy measuring threshold value, then carry out the unlicensed spectrum
Access.
2. frequency spectrum access control method according to claim 1, it is characterised in that the feedback information is on using institute
Whether the transmission for stating unlicensed spectrum is properly received, and according to the feedback information adjust the energy measuring threshold value the step of
Including：
If the feedback information is not properly received on the transmission using the unlicensed spectrum, the energy measuring is reduced
Threshold value；And
If the feedback information is on being properly received using the transmission of the unlicensed spectrum, increasing the energy measuring door
Threshold value.
3. frequency spectrum access control method according to claim 2, it is characterised in that increase the energy measuring threshold value
Step includes：
If it is big on the reception number that is properly received using the transmission of the unlicensed spectrum continuously to receive the feedback information
In number threshold value, then increase the energy measuring threshold value；And
If continuously receive the feedback information be on the reception number that is properly received using the transmission of the unlicensed spectrum not
More than the number threshold value, then the energy measuring threshold value is maintained.
4. frequency spectrum access control method according to claim 2, it is characterised in that the feedback information includes confirmation message
And nonacknowledgement information.
5. frequency spectrum access control method according to claim 1, it is characterised in that the feedback information is on channel strips
Part, and include according to the step of feedback information adjustment energy measuring threshold value：
If the feedback information is less than and compares threshold value, the energy measuring threshold value is reduced；And
If the feedback information is not less than the relatively threshold value, increase the energy measuring threshold value.
6. frequency spectrum access control method according to claim 5, it is characterised in that the feedback information includes channel status
Information, and the channel status information includes channel quality instruction, pre-coding matrix instruction and order instruction.
7. frequency spectrum access control method according to claim 1, it is characterised in that receive on accessing the unauthorized frequency
Before the feedback information of spectrum, further include：
For a plurality of downlink data transmission, in setting the energy measuring threshold value of a scheduling as the downlink data transmission
Maximum, minimum value or average value.
A kind of 8. R-T unit, it is characterised in that including：
Receiving circuit, signal is received via unlicensed spectrum；
Transmitting circuit, signal is transmitted via the unlicensed spectrum；And
Process circuit, couples the receiving circuit and the transmitting circuit, and is configured to perform：
Feedback information on accessing the unlicensed spectrum is received by the receiving circuit；
Energy measuring threshold value is adjusted according to the feedback information；And
Judge whether to access the unlicensed spectrum according to the energy measuring threshold value, if wherein on the unlicensed spectrum
Detected signal strength is more than the energy measuring threshold value, then access of the forbidden energy to the unlicensed spectrum, if in institute
State detected signal strength on unlicensed spectrum and be not more than the energy measuring threshold value, then carried out by the transmitting circuit
The access of the unlicensed spectrum.
9. R-T unit according to claim 8, it is characterised in that the feedback information is on using the unauthorized
Whether the transmission of frequency spectrum is properly received, and the process circuit is configured to perform：
If the feedback information is not properly received on the transmission using the unlicensed spectrum, the energy measuring is reduced
Threshold value；And
If the feedback information is on being properly received using the transmission of the unlicensed spectrum, increasing the energy measuring door
Threshold value.
10. R-T unit according to claim 9, it is characterised in that the process circuit is configured to perform：
If it is big on the reception number that is properly received using the transmission of the unlicensed spectrum continuously to receive the feedback information
In number threshold value, then increase the energy measuring threshold value；And
If continuously receive the feedback information be on the reception number that is properly received using the transmission of the unlicensed spectrum not
More than the number threshold value, then the energy measuring threshold value is maintained.
11. R-T unit according to claim 9, it is characterised in that the feedback information includes confirmation message and not true
Recognize information.
12. R-T unit according to claim 8, it is characterised in that the feedback information is and described on channel condition
Process circuit is configured to perform：
If the feedback information is less than and compares threshold value, the energy measuring threshold value is reduced；And
If the feedback information is not less than the relatively threshold value, increase the energy measuring threshold value.
13. R-T unit according to claim 12, it is characterised in that the feedback information includes channel status information,
And the channel status information includes channel quality instruction, pre-coding matrix instruction and order instruction.
14. R-T unit according to claim 8, it is characterised in that the process circuit is configured to perform：
For a plurality of downlink data transmission, in setting the energy measuring threshold value of a scheduling as the downlink data transmission
Maximum, minimum value or average value.
15. R-T unit according to claim 8, it is characterised in that the R-T unit system uses the base of mobile network
Platform or user's equipment.
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Application publication date: 20180413 |