CN106559797B - Method and apparatus for being listened to before the session in multi-carrier transmission - Google Patents
Method and apparatus for being listened to before the session in multi-carrier transmission Download PDFInfo
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Classifications
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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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
- H04L5/0062—Avoidance of ingress interference, e.g. ham radio channels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
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Abstract
Each embodiment of the disclosure provides the method and apparatus for listening to LBT before the session in multi-carrier transmission.This method includes that multiple carrier waves are divided into the grouping of at least one carrier wave.This method further includes the type of service based on the data block to transmit on each carrier wave in multiple carrier waves, corresponding LBT priority type is determined for each carrier wave grouping in the grouping of at least one carrier wave, wherein each LBT priority type corresponds to the different parameters set for executing LBT.This method further comprises being executed LBT based on the corresponding parameter sets of identified LBT priority type on the included carrier wave of each carrier wave grouping in the grouping of at least one carrier wave, whether can be used for transmission data block with each carrier wave in the multiple carrier waves of determination.
Description
Technical field
Embodiment of the disclosure relates generally to wireless communication field, and more particularly, in multi-carrier transmission
In session before listen to the method and apparatus of (Listen-Before-Talk, LBT).
Background technique
In recent years, the portfolio on cellular communications networks constantly increases, thus needs more frequency spectrums to provide
Higher network capacity.However, since authorization frequency spectrum is limited, in order to further increase the utilization rate of frequency spectrum resource, now
Discussing how to utilize unlicensed spectrum, such as 2.4GHz and 5GHz frequency range etc..These unlicensed spectrums are at present mainly by all
Such as Wi-Fi, bluetooth, radar, medical treatment communication system use.For example, 3GPP (third generation partner program) proposes LAA-
(Licensed-Assistant Access using Long Term Evolution is connect LTE using the authorization assistance of LTE
Enter) concept, authorize frequency spectrum to help using unlicensed spectrum by LTE.
The existing communication system using authorization frequency spectrum, such as LTE is it has been specified that various mechanism avoid doing for guaranteeing
It disturbs, so the uplink downlink transmission between base station and user does not have to consider whether surrounding is having other base stations or other users
Transmit data.However, if LTE do not consider when using unlicensed spectrum yet around whether have other equipment using unauthorized
Frequency spectrum, the user that unlicensed spectrum is used to such as Wi-Fi equipment etc is brought larger interference by this.Current Wi-Fi
System has the rule for avoiding interference, and basic principle is that the access point of Wi-Fi or user terminal are sending data
Listened in the single carrier wave of unlicensed spectrum before the carrier wave whether used by other access points or other users terminal (
That is, whether listen to the carrier wave in a busy state).This mechanism listens to (LBT) mechanism before being referred to as session.
It is coexisted to realize with the system that unlicensed spectrum is used of Wi-Fi system etc., LTE system makes
It is should also be as when carrying out communications with unlicensed spectrum using LBT mechanism.It, usually will be across multiple carrier wave tune for LTE system
Degree evidence, however the LBT mechanism applied in Wi-Fi system is confined to the detection to single carrier wave.Therefore, it is necessary in multicarrier
The scheme of LBT in transmission.
Summary of the invention
The scheme listened to before the session of embodiment of the disclosure being designed to provide in multi-carrier transmission.
According to the disclosure in a first aspect, providing a kind of method for the LBT in multi-carrier transmission.This method packet
It includes and multiple carrier waves is divided into the grouping of at least one carrier wave.This method further includes based on will be on each carrier wave in multiple carrier waves
The type of service of the data block of transmission determines corresponding LBT priority for each carrier wave grouping in the grouping of at least one carrier wave
Type, wherein each LBT priority type corresponds to the different parameters set for executing LBT.This method further comprises base
In the corresponding parameter sets of identified LBT priority type, each carrier wave grouping in the grouping of at least one carrier wave is wrapped
LBT is executed on the carrier wave included, whether transmission data block can be used for each carrier wave in the multiple carrier waves of determination.
According to one embodiment of the disclosure, it includes by multiple carrier waves that multiple carrier waves, which are divided into the grouping of at least one carrier wave,
Multiple carrier wave groupings are divided into, wherein the grouping of each carrier wave includes a carrier wave in multiple carrier waves.
According to one embodiment of the disclosure, it includes by the same frequency that multiple carrier waves, which are divided into the grouping of at least one carrier wave,
At least two adjacent carrier waves are taken to be divided in a carrier wave grouping.
According to one embodiment of the disclosure, multiple carrier waves include unauthorized carrier wave.
It is corresponding for each carrier wave grouping determination in the grouping of at least one carrier wave according to one embodiment of the disclosure
LBT priority type includes that determination will be transmitted on the included carrier wave of the first carrier grouping in the grouping of at least one carrier wave
The type of service of data block corresponds to multiple LBT priority types；And highest or most is selected from multiple LBT priority types
Low LBT priority type is used as the LBT priority type of first carrier grouping.
According to one embodiment of the disclosure, the parameter sets of each LBT priority type include at least maximum contention window
Mouth and minimum competition window.Executing LBT on the included carrier wave of each carrier wave grouping in the grouping of at least one carrier wave includes:
Determine contention window size corresponding with the grouping of each carrier wave, wherein it is excellent to be in the corresponding LBT of carrier wave grouping for contention window size
Between maximum contention window and minimum competition window in the parameter sets of first grade type；It is grouped based on each carrier wave corresponding competing
Window size is striven, determines that random back count window size corresponding with carrier wave grouping, the random back count window size refer to
Show the accumulative clear channel assessment (CCA) time slot that carrier wave is in idle condition before determining that carrier wave can be used for transmission data block；And
It is grouped corresponding random back count window size based on each carrier wave, executes LBT on the included carrier wave of carrier wave grouping.
According to one embodiment of the disclosure, the parameter sets of each LBT priority type include at least prolonging for LBT
Slow time, delay time instruction are next time idle to continuing after detecting that clear channel assessment (CCA) is in a busy state
Minimum latency before channel estimating.Executing LBT on the included carrier wave of carrier wave grouping further comprises based on each
Carrier wave is grouped the delay time of corresponding LBT priority type, executes LBT on the included carrier wave of carrier wave grouping.
According to one embodiment of the disclosure, this method further comprises in response to detecting at least one in multiple carrier waves
A carrier wave can be used for transmission data block, and corresponding data block is transmitted at least one carrier wave.
According to one embodiment of the disclosure, the parameter sets of each LBT priority type are accounted for including at least maximum transmitted
With the time, and wherein at least two carrier wave is detected as can be used for transmission data block, and at least two carrier waves are included in
In different carrier wave groupings.It is preferential that this method further comprises determining that the carrier wave including at least two carrier waves is grouped corresponding LBT
The minimum time value in maximum transmitted holding time in the parameter sets of grade type.It is transmitted at least one carrier wave corresponding
Data block simultaneously transmits corresponding data block including the use of minimum time value at least two carrier waves.
According to one embodiment of the disclosure, this method further comprises after transmitting corresponding data block, based on pre-
It fixes, to adjust the corresponding contention window size of carrier wave grouping including at least one carrier wave or adjust at least one carrier wave
Each carrier wave in grouping is grouped corresponding contention window size.According to one embodiment of the disclosure, adjusted contention window
Mouth size is used to execute LBT next time on the included carrier wave of corresponding carriers grouping.
According to one embodiment of the disclosure, predetermined criterion is based at least one of the following and is grouped to each carrier wave
The feedback of data transmission on included carrier wave；And the knot of the LBT executed on the included carrier wave of each carrier wave grouping
Fruit.
According to one embodiment of the disclosure, this method further comprises updating every after transmitting corresponding data block
A carrier wave is grouped corresponding random back count window size.According to one embodiment of the disclosure, adjusted random back
Count window size is used to execute LBT next time on the included carrier wave of corresponding carriers grouping.
According to the second aspect of the disclosure, a kind of device for the LBT in multi-carrier transmission is provided.The device packet
Carrier wave division unit is included, is configured as multiple carrier waves being divided into the grouping of at least one carrier wave.The device further includes that priority is true
Order member, is configured as the type of service based on the data to transmit on each carrier wave in multiple carrier waves, is at least one
Each carrier wave grouping in carrier wave grouping determines corresponding LBT priority type, and each LBT priority type, which corresponds to, to be used for
The different parameters set of LBT.The device further comprises listening to execution unit, is configured as based on identified LBT priority
The corresponding parameter sets of type execute LBT on the included carrier wave of each carrier wave grouping in the grouping of at least one carrier wave, with
Determine whether each carrier wave in multiple carrier waves can be used for transmission data block.
By being described below it will be understood that, according to an example embodiment of the present disclosure, in multi-carrier communication, based on will be
The type of service for the data block transmitted on each carrier wave in multiple carrier waves, be include one or more carrier waves carrier wave grouping it is true
Fixed corresponding LBT priority type.Each LBT priority type corresponds to the different parameter sets for LBT.According to passing
The difference of defeated data block can determine different LBT priority types for different carrier wave groupings, so as to based on difference
Parameter sets execute LBT on this carrier wave.Other benefits brought by the example embodiment of the disclosure will be by hereafter retouching
It states and clear.
Detailed description of the invention
The following detailed description is read with reference to the accompanying drawings, the above-mentioned and other purposes of the embodiment of the present disclosure, feature and
Advantage will become prone to understand.In the accompanying drawings, several embodiments of the disclosure are shown by way of example rather than limitation,
Wherein:
Fig. 1 is the figure of system and or method described herein example context that can be implemented in it；
Fig. 2 is the figure of the exemplary components of one or more equipment of Fig. 1；
Fig. 3 shows the mistake for listening to before the session in multicarrier transmission of one embodiment according to the disclosure
The flow chart of journey；
Fig. 4 shows the schematic diagram of the example LBT priority type mapping table according to one embodiment of the disclosure；
Fig. 5 shows the signal that process is listened to before the session over a number of carriers according to one embodiment of the disclosure
Figure；And
Fig. 6 shows the dress for listening to before the session in multicarrier transmission of one embodiment according to the disclosure
The block diagram set.
Specific embodiment
Several exemplary embodiments shown in below with reference to the accompanying drawings describe the principle and spirit of the disclosure.It should manage
Solution describes these embodiments just for the sake of making those skilled in the art can better understand that realize the disclosure in turn, and simultaneously
It is non-to limit the scope of the present disclosure in any way.
In the description to embodiment of the disclosure, term " includes " and its similar term should be understood as open packet
Contain, i.e., " including but not limited to ".Term "based" should be understood as " being based at least partially on ".Term " one embodiment " or
" embodiment " should be understood as " at least one embodiment ".
In the description to embodiment of the disclosure, user equipment (UE) may refer to terminal, mobile terminal (MT), subscriber
Stand (SS), portable subscriber station (PSS), movement station (MS) or access terminal (AT), and UE, terminal, MT, SS, PSS, MS or
Some or all functions of AT can be included.UE can be any type of mobile terminal, fixed terminal or portable
Terminal, including cell phone, website, unit, equipment, multimedia computer, multimedia plate, internet node, communicator, platform
Formula computer, laptop computer, notebook computer, netbook computer, tablet computer, PCS Personal Communications System (PCS)
Equipment, personal navigation equipment, personal digital assistant (PDA), audio/video player, digital camera/video camera, positioning device,
Television receiver, radio broadcast receiver, electronic book equipment, game station or any combination thereof, including these equipment
Accessory and peripheral hardware or any combination thereof.It is also contemplated that any type of interface for user can be supported (such as
" wearable " circuit etc.).
In the description to embodiment of the disclosure, term " base station (BS) " is sometimes referred to as " BS/ point " or " point ", with
It is consistent with 3GPP term.It should be noted that term " BS/ point ", " point " and " BS " has same meaning in this disclosure, and
And each of which can indicate, such as node B (NodeB or NB), evolved NodeB (eNodeB or eNB), nothing
Line dateline end (RH), Remote Radio head end (RRH), relaying, femto base station, low power nodes of femto base station etc..
Fig. 1 is the figure of method described herein and/device example context 100 that can be implemented in it.Such as Fig. 1 institute
Show, base station (BS) 110 can via link 132 to user equipment (UE) 122 transmit data, and can via link 136 to
UE 124 transmits data.Link 132 and 136 can be referred to as downlink (DL).BS 110 can wherein provide service
Geographic area can be referred to as cell, and UE 122 and 124 is in the cell range.As is further illustrated in figure 1, UE 122 can be with
Data are transmitted to BS 110 via link 134, and UE 124 can transmit data to BS 110 via link 138.Link 134
Uplink (UL) can be referred to as with 138.
BS 110 can dispatch the data for going to UE 122 and 124, and UE on multiple carrier waves, such as carrier wave 1 to 5
122 or 124 can also dispatch the data for going to BS110 on carrier wave 1 to 5.One fixed length of each carrier occupancy in carrier wave 1 to 5
The frequency range of degree.For example, each carrier wave can have the length of 20MHz.Alternatively or additionally, some or institute in carrier wave 1 to 5
There is carrier wave adjacent to each other.In other examples, carrier wave 1 to 5 can be not adjacent to each other.Sending ending equipment is (for example, BS
110, UE 122 or UE 124) can independently each carrier wave in scheduling carrier wave 1 to 5 for carrying data.It is passed from data
From the perspective of defeated, each carrier wave is also independent from other carrier waves and works.
One or more carrier waves in carrier wave 1 to 5 may be unauthorized carrier wave.These unauthorized carrier waves are also possible to by Wi-
The work such as Fi system is transmitted in the system call of unauthorized frequency range for data.In embodiment of the disclosure, sending ending equipment
(for example, BS 110, UE 122 or UE 124) before being carried out data transmission using any carrier wave in carrier wave 1 to 5, in order to
It avoids and may just be conflicted using what the data of the carrier wave were transmitted, listened to before first can executing session on the carrier wave.If inspection
Measuring the carrier wave is idle and can be used for transmitting data, then transmits data using the carrier wave.If detecting the carrier wave not
It can be used for transmitting data, then continue to listen to the carrier wave.
As previously mentioned, carrier wave 1 to 5 is independent of each other for the angle that data are transmitted.Therefore, in different carrier waves
The type of service of the data block of upper transmission can be different.Different types of data usually have different quality of service requirement.Example
Such as, business, such as voice data or the video data high for requirement of real-time, it is desired to be able to rapidly obtain to channel
The access of (that is, carrier wave).However, the requirement to the access of channel may for some the best services or Batch Processing
It will not be so stringent.In the communication system of such as LTE etc, sending ending equipment can be different types of across multiple carrier-wave transmissions
Data.For example, BS 110 can transmit voice and video to UE 122 and 124 respectively on carrier wave 1 to 5.For another example UE 122
It may need to send voice and video to BS 110 simultaneously.In such circumstances it is desirable to based on to transmit on each carrier
Data come in corresponding carriers execute session before listen to, to meet the quality of service requirement of different data.Due to before session
Listen to LBT parameter used in process for listened to before session result (for example, the channel access chance of data to be transmitted,
Channel holding time etc.) have and influences, when being listened to before executing session over a number of carriers, for being detectd before the session of each carrier wave
LBT parameter used in process is listened to need to configure.This will be described in detail below.
The number and arrangement of equipment shown in FIG. 1 are provided as an example.In practice, there may be another
Outer equipment, less equipment, different equipment, or to be set with what these equipment shown in Fig. 1 were differently arranged
It is standby.In addition, the cluster tool (for example, one or more equipment) of environment 100 can execute and be described as by the another of environment 100
One or more functions performed by a cluster tool.
Fig. 2 is the figure of the exemplary components of equipment 200.Equipment 200 can correspond to BS 110, UE 122 or UE 124.
In some embodiments, objective BS 110, UE 122 or UE124 may include one or more equipment 200, and/or equipment 200
One or more components.As shown in Fig. 2, equipment 200 may include bus 210, processor 220, memory 230, storage group
Part 240, input module 250, output precision 260 and communication component 270.
Bus 210 may include the component for allowing the communication among the component of equipment 200.Processor 220 is with hardware, solid
The combination of part or hardware and software is realized.Processor 220 may include processor (for example, central processing unit (CPU),
Graphics processing unit (GPU), acceleration processing unit (APU) etc.), microprocessor, and/or interpretation and/or execute instruction any
Processing component (for example, field programmable gate array (FPGA), specific integrated circuit (ASIC) etc.).Memory 230 may include
Information that random access storage device (RAM), read-only memory (ROM), and/or storage are used by processor 220 and/or instruction
Another type of dynamic or static storage device (for example, flash memory, magnetic memory, optical memory etc.).
Storage assembly 240 can store and the operation of equipment 200 and use related information and/or software.For example, storage
Component 240 may include hard disk (for example, disk, CD, magneto-optic disk, solid-state disk etc.) together with corresponding driver, compression
Disk (CD), Digital versatile disc (DVD), floppy disk, disk (cartridge), tape, and/or another type of computer can
Read medium.
Input module 250 may include allow equipment 200 such as received via user's input information component (for example,
Touch-screen display, keyboard, keypad (keypad), mouse, button, switch, microphone etc.).Additionally or alternatively, it inputs
Component 250 may include for induction information inductor (for example, global positioning system (GPS) component, accelerator, gyroscope,
Actuator etc.).Output precision 260 may include from equipment 200 provide output information component (for example, display, loudspeaker,
One or more light emitting diodes (LED) etc.).
Communication interface 270 may include enabling equipment 200 via such as wired connection, wireless connection or wired
Combination with wireless connection is come the component of the class transceiver communicated with other equipment (for example, transceiver, individual receiver
With transmitter etc.).Communication interface 270 can permit equipment 200 and receive information from another equipment and/or provide letter to another equipment
Breath.For example, communication interface 270 may include Ethernet interface, optical interface, coaxial interface, infrared interface, radio frequency (RF) interface,
Universal serial bus (USB) interface, Wi-Fi interface, cellular network interface etc..
Equipment 200 can execute one or more processes and/or method described herein.Equipment 200 can be in response to
Processor 200 executes the software instruction stored by computer-readable medium (such as memory 230 and/or storage assembly 240)
To execute these processes.Computer-readable medium is defined herein as non-transient storage equipment.It includes single for storing equipment
Memory space in physical storage device or the memory space across the extension of multiple physical storage devices.
Software instruction can be from another computer-readable medium or via communication interface 270 and from another equipment quilt
It reads in memory 230 and/or storage assembly 240.When executed, memory 230 and/or storage assembly 240 are stored in
In software instruction computer 220 can be promoted to execute one or more process described herein.Additionally or alternatively, firmly
Connection circuit can replace software instruction or be combined together with software instruction to execute one described herein or more
A process.Therefore, embodiment described herein is not limited to any specific combination of hardware circuit and software.
The number and arrangement of component shown in figure 2 are provided as an example.In practice, equipment 200 can
To include other component, less component, different components, or differently to be carried out with these components shown in Figure 2
The component of arrangement.Additionally or alternatively, the assembly set (for example, one or more components) of equipment 200, which can execute, is retouched
It states as one or more functions performed by another assembly set as equipment 200.
Fig. 3 shows the process for listening to before the session in multi-carrier transmission of one embodiment according to the disclosure
300 flow chart.In some embodiments, process 300 can be executed by the sending ending equipment of multi-carrier transmission.For example, mistake
Journey 300 can be executed by send the BS 110 of data to UE 122 and/or 124.In another example process 300 can be from will be to
BS 110 sends the UE 122 or 124 of data to execute.Additionally or alternatively, process 300 can also by with sending ending equipment
Isolated equipment or cluster tool executes.Although Fig. 3 shows the example frame of process 300, in some embodiments, process
300 may include other frame, less frame, different frames or differently be arranged with these frames described in Fig. 3
Frame.Additionally or alternatively, two or more frames of process 300 can be concurrently performed.
As shown in figure 3, process 300 may include that multiple carrier waves are divided into the grouping of at least one carrier wave, each carrier wave point
Group includes at least one carrier wave (frame 310) in the multiple carrier wave.In some embodiments, by sending ending equipment (for example, BS
110, UE 122 or UE 124) execute carrier wave division.In some embodiments, sending ending equipment has detected multiple data
Stream will transmit respectively over a number of carriers, thus listen to before needing the session to multiple carrier wave implementation procedures 300, be with determination
It is no that corresponding data block can be transmitted on these carrier waves.In some embodiments, multiple carrier waves may include occupying unauthorized
The unauthorized carrier wave of frequency spectrum authorizes the combination of carrier wave or unauthorized carrier wave and authorization carrier wave.The range of embodiment of the disclosure
It is not limited in this respect.
In embodiment of the disclosure, according to the corresponding quality of service requirement of the type of service of different data blocks come to more
A carrier wave is listened to before executing session.The quality of service requirement of different data blocks makes during can correspond to listen to before session
Different parameters.In some embodiments, it is desirable to determine independent parameter for session for each carrier wave in multiple carrier waves
Before listen to.In other embodiments, it is desired for some or all of multiple carrier waves carrier wave and determines that public parameter is used for
It is listened to before session.Thus, multiple carrier waves can be divided into one or more carrier waves first and are grouped by sending ending equipment, then to carry
Wavelength-division group is that unit determines the parameter for listening to before session accordingly.
In some embodiments, each carrier wave grouping divided may include only one carrier wave.It is also to say, can is every
A carrier wave determines independent parameter for listening to before session.In some embodiments, the grouping of carrier wave may include two or
More multicarrier.For multiple carrier waves in the grouping of the same carrier wave, public parameter can have for listening to before session.One
In a little situations, at least two adjacent on the same frequency band carrier waves can be divided into a carrier wave grouping.For example, if
Each carrier wave has 20MHz bandwidth, for the frequency band of 100MHz, five carrier waves being located in the frequency band can be divided into one
Carrier wave grouping, so that identical parameter can be used to listen to before conversating in this five carrier waves grouping.
As further shown in figure 3, process 300 further includes based on the data to transmit on each carrier wave in multiple carrier waves
The type of service of block determines corresponding LBT priority type for each carrier wave grouping in the grouping of at least one carrier wave, each
LBT priority type corresponds to the different parameters set (frame 320) for executing LBT.In some embodiments, it is set by transmitting terminal
The LBT priority type that standby (for example, BS 110, UE 122 or UE 124) executes carrier wave grouping determines.
As previously mentioned, determining the ginseng for being used for LBT accordingly in embodiment of the disclosure, as unit of being grouped by carrier wave
Number.No matter a carrier wave grouping is including only one carrier wave or including multiple carrier waves, which, which is grouped, can have oneself solely
Vertical parameter is used for LBT.
In embodiment of the disclosure, multiple LBT priority types can be pre-defined, each LBT priority type can
(hereinafter, to be also referred to as " LBT parameter " or " LBT ginseng sometimes with the corresponding different parameters set for LBT
Manifold is closed ").In some embodiments, LBT parameter sets can include at least maximum contention window and (can be represented as
“CWmax"), minimum competition window (" CW can be represented asmin") and delay time (Defer Time).Additionally or alternatively
Ground, LBT parameter sets (can also be referred to as transmission opportunity " Transmission with maximum transmitted holding time
Opportunity ", TXOP), when indicating to determine that carrier wave can be used for that the carrier wave can be occupied maximum after transmission data block every time
Between.These parameters in LBT parameter sets can be preconfigured.For different LBT priority types, in these parameters
One, some or all parameters can be different.In one example, LBT priority is higher, corresponding CWmax、CWmin, prolong
Slow time and/or TXOP can be smaller.In other examples, LBT priority and parameter size can have other corresponding relationships.It closes
It will be described in detail below in use of these parameters during LBT.
In embodiment of the disclosure, the service class for the data block that transmitted on each carrier depending on sending ending equipment
Type can determine that each carrier wave is grouped corresponding LBT priority type.For example, there may be data block type of service (or
Quality of service requirement) and LBT priority type between mapping relations.According to this mapping relations, can determine in each load
The corresponding LBT priority type of the data block transmitted on wave, and then it is preferential to determine that the carrier wave including the carrier wave is grouped corresponding LBT
Grade type.
Fig. 4 shows the corresponding LBT parameter sets of multiple LBT priority types.It should be noted that LBT parameter set
These parameters in conjunction are configurable.LBT can be configured in different communication systems or in different cells
Different mappings between priority type and LBT parameter sets.
In the example of fig. 4, maximum contention window and minimum competition window are integers, before unit can be execution session
A time slot, such as clear channel assessment (CCA) (Clearance Channel Assessment, the CCA) time slot listened to.CCA time slot
It can be such as 9 μ s.In the example of fig. 4, as LBT priority type is lower, maximum transmitted holding time (i.e. TXOP) is more
Greatly.In the LBT parameter shown in Fig. 4, parameter n is determined for delay time.For example, delay time can be based on following public
Formula calculates:
Tdefer=(16+n × tslot)μs (1)
Wherein TdeferIndicate delay time；And tslotIt indicates to execute a CCA time slot.In one example, tslotIt can
To be 9 μ s.By formula (1) it is found that when the difference of the corresponding n of different LBT priority types, corresponding delay time is not yet
Together.It should be noted that delay time T can also be determined based on parameter n otherwisedefer。
Fig. 4 also shows the mapping relations between LBT priority type and different service types.In the example of fig. 4, it takes
The higher data block of quality requirement (for example, voice, video etc.) is engaged in corresponding to higher LBT priority type.It will be appreciated that
In other embodiments, the data of LBT priority type and different service types can also be reflected according to other criterion
It penetrates.
Based on the mapping relations between LBT priority type and type of service, for the included load of each carrier wave grouping
The difference of the type of service of the data block to be transmitted on wave can determine that the carrier wave is grouped corresponding LBT grade.In some implementations
In example, if a carrier wave grouping includes only single carrier wave, and the data block of single type is transmitted on the carrier wave, then according to reflecting
The relationship of penetrating can determine corresponding LBT grade for carrier wave grouping.In some embodiments, if a carrier wave grouping includes more
A carrier wave and the data block of different service types is transmitted on each carrier or the grouping of carrier wave includes single carrier wave
And the data block (including the data block of different service types) of mixing is transmitted on the carrier wave, then can according to mapping relations
To determine multiple LBT priority types corresponding with these types of service.In such a case, it is possible to from multiple LBT priority
Highest LBT priority type is selected to be used as the LBT priority type of carrier wave grouping in type.In another embodiment,
If defining maximum transmitted holding time (that is, TXOP) in LBT parameter sets, and LBT priority type is lower, TXOP is got over
Greatly, then the LBT that minimum LBT priority type can be selected to be grouped from multiple LBT priority types as the carrier wave is preferential
Grade type, so as to support highest priority business quality of service requirement.It in other embodiments, can be excellent from multiple LBT
A LBT priority type is randomly choosed in first grade type as the carrier wave is grouped corresponding LBT priority type.The disclosure
The range of embodiment is not limited in this respect.
Although showing some LBT priority types, corresponding LBT parameter sets and mapped service class in Fig. 4
Type it should be appreciated that it can also configure more or fewer LBT priority types, more or fewer types of service,
And it can configure and shown different LBT parameters.Additionally or alternatively, LBT priority type and industry can be configured
The different mappings of service type.For example, a LBT priority class can be corresponded to two or more different type of service
Type.
As further shown in figure 3, process 300 further include based on the corresponding parameter sets of identified LBT priority type,
LBT is executed on the included carrier wave of each carrier wave grouping in the grouping of at least one carrier wave, with every in the multiple carrier waves of determination
Whether a carrier wave can be used for transmission data block (frame 330).In some embodiments, by sending ending equipment (for example, BS 110, UE
122 or UE 124) execute LBT.
In embodiment of the disclosure, the carrier wave included for the grouping of each carrier wave, can use carrier wave grouping
The corresponding parameter sets of LBT priority type to execute LBT to included carrier wave.If a carrier wave grouping includes multiple loads
Wave, then multiple carrier waves share a public LBT parameter sets.Depending on the number to be transmitted on the carrier wave in carrier wave is grouped
According to the LBT parameter sets of some carrier wave groupings may be identical, can not also be identical.
In embodiment of the disclosure, although multiple carrier waves are divided into carrier wave grouping for determining corresponding LBT
Parameter, but after the corresponding LBT parameter of each carrier wave has been determined, LBT can be executed separately for each carrier wave.It is based on
The identified parameter for being used to execute LBT, is listened to before can executing session using technology is listened to before a plurality of types of sessions.With
Under an example session is described in one embodiment before listen to process.
In some embodiments, during listening to before the session of each carrier wave, sky can be executed in multiple CCA time slots
Whether channel assessment is idle to assess the carrier wave.It specifically, can be in the maximum contention window and minimum competition window of LBT parameter
Contention window size (" CWS " can be represented as) is determined between mouthful.In one example, CWS can be initially set to
Minimum competition window CWmin, CWS can be adjusted further later.The adjustment of contention window size CWS is discussed further below.
In some embodiments, it can determine that random back counts (Backoff Counter) window size according to contention window size
(" N " can be represented as).Random back count window size N can be indicated before determining that carrier wave can be used for transmission data block
The accumulative clear channel assessment (CCA) time slot that the carrier wave is in idle condition.In general, not being carried once being determined in some CCA time slot
Wave is in idle and then uses the carrier wave immediately, and is the need to ensure that the carrier wave is in the free time within a certain period of time, to avoid with
The transmission collision of other equipment.
In some embodiments, one pseudorandom of middle selection can be uniformly distributed from 0 to contention window size CWS
Number is used as random back count window size N.N is usually integer.During being listened to before the session to each carrier wave, every time
(for example, in a CCA time slot) detects that carrier wave is in idle condition, then subtracts 1 for random back count window size N.Such as
Fruit detects that the carrier wave is in a busy state, then keeps random back count window size N constant.It, can if N is reduced to 0
To determine that the carrier wave can be used for transmission data block.
In some embodiments, LBT parameter sets may include delay time Tdefer, instruction is in clear channel assessment (CCA) to load
To the minimum latency continued before clear channel assessment (CCA) next time after wave is in a busy state.In such case
Under, it is also based on delay time TdeferTo listen to before executing the session to carrier wave.In one example, the load is detected every time
When wave is in a busy state, T is waited at least for firstdeferTime, during this period of time random back count window size N keep
It is constant.Waiting TdeferTime after continue to test the state (idle or busy) of the carrier wave.
The above-mentioned random back count window size N according to determined by is (in one example also according to delay time Tdefer)
The process of the clear channel assessment (CCA) of execution can be referred to as extension clear channel assessment (CCA) (eCCA) process.In some embodiments,
If eCCA process determines that carrier wave can be used for transmitting, corresponding data block is transmitted on the carrier wave.In other embodiments, may be used
To wait the short period again, determine that carrier wave is still constantly in idle state during this period of time.This process can be referred to as
Initial idle channel estimating (ICCA).In one example, during ICCA, such as 25 μ s can be waited.If in ICCA
In the process, carrier wave is still within idle state, then listens to successfully and can start before can determining the session to the carrier wave
The carrier wave transmitting data block.If detecting that the carrier wave is occupied during ICCA, it is determined that before the session of the carrier wave
Listen to failure.
It is revealed since radio frequency (RF) may occur between adjacent carrier, if on a carrier wave in adjacent carrier
Transmission, then listening to successful probability before executing session on other idle carrier waves will very little.Therefore, in some embodiments
In, process and/or subsequent data transmission procedure are listened to before the session of multiple carrier waves can be synchronized.In one embodiment, may be used
To listen to before being performed simultaneously session to multiple carrier waves.Additionally or alternatively, a LBT synchronous boundaries can be set, it is same in LBT
The carrier wave listened to before session has been completed before step boundary will continue waiting for until reaching the LBT synchronous boundaries.If reaching
It is listened to before remaining unfulfilled the session to carrier wave after LBT synchronous boundaries, it is determined that the synchronous detection failure of LBT.Additionally or alternatively,
Synchronous transfer boundary can also be set, it is same at this by listening to the carrier wave for being confirmed as can be used for transmission data block later before session
Step transmission boundary starts simultaneously at data transmission.
Fig. 5 shows a specific example for executing LBT process over a number of carriers.As shown in figure 5, in LTE system
Sending ending equipment expectation sends corresponding data on carrier wave 1 to 5.In the example of hgure 5, carrier wave 1 to 5 may include unauthorized
Carrier wave, thus other systems, such as Wi-Fi system may dispatch these carrier waves and be used for transmission data block.Hair in LTE system
Sending end equipment is listened to before can executing session to these carrier waves before transmission data block.In the example of fig. 5, it is assumed that being directed to
Each carrier wave individually determines corresponding LBT priority type (corresponding LBT parameter) for detecting.That is, each load
Wavelength-division group includes a carrier wave.The influence of RF leakage, sending ending equipment are listened to before can starting simultaneously at session in order to prevent, and
LBT synchronous boundaries are set to the end for listening to process before simultaneous session and setting synchronous transfer boundary to synchrodata biography
It is defeated.Listen to before session may include eCCA process and ICCA process.
For carrier wave 1, random back count window size (that is, keeping out of the way counting) N is determined according to identified LBT parameter1
It is 4.Detect that carrier wave 1 is in idle condition in the 1st time slot listened to before starting session, thus by N1Subtract 1.At first 4
Detect that carrier wave 1 is in idle condition in time slot, N1It is reduced to 0.At this point it is possible to determine the detection of the eCCA process of carrier wave 1
The result is that successfully, and do not continue to execute detection, but wait LBT synchronous boundaries.
For carrier wave 2, the data to transmit on carrier 2 are different from carrier wave 1, thus the random back determined for carrier wave 2
Count window size N2With N1It is not identical, N2Equal to 6.After 6 time slots listened to before starting session, carrier wave 2 one can be determined
Directly it is in idle condition, thus N2It is successful for being reduced to the testing result of 0 and eCCA process.It can not continue to hold at this time
Row detection, but wait LBT synchronous boundaries.
For carrier wave 3, random back count window size N is determined according to identified LBT parameter3It is 5.At first 2
In gap, determine that carrier wave 3 is in idle condition, and random back count window size N3It is reduced to 3.In the 3-5 time slot,
Carrier wave 3 is occupied by Wi-Fi system, thus the sending ending equipment in LTE system detects that carrier wave 3 is in a busy state and keeps
N3It is constant.From the 6th time slot, continues to test carrier wave 3 and be in idle condition, thus to N3Execution is successively decreased (assuming that without utilizing
Delay time Tdefer).After 8 time slots, it can determine that the testing result of the eCCA process of carrier wave 3 is successful.At this time may be used
Not continue to execute detection, but wait LBT synchronous boundaries.
For carrier wave 4, random back count window size N is determined according to identified LBT parameter4It is 6.In eCCA process
In, N4It is reduced to 0, thus determines that the testing result of the eCCA process of carrier wave 4 is successful.
For carrier wave 5, random back count window size N is determined according to identified LBT parameter5It is 6.It is detectd before session
During the eCCA listened, carrier wave 4 rises in the 2nd time slot and is occupied by Wi-Fi system always.When reaching LBT synchronous boundaries, carrier wave
5 random back count window size N5Equal to 1, it is not reduced to 0 also.Hence, it can be determined that the detection of the eCCA process of carrier wave 5
The result is that failure.
When reaching LBT synchronous boundaries, can determine the eCCA process of carrier wave 1 to 4 the result is that successful, and carrier wave 5
ECCA process be failure.Therefore, it is confirmed as being not useable for transmitting data during carrier wave 5 is listened to before this session
Block.Later, ICCA process is continued to execute, whether assessment carrier wave 1 to 4 is still within idle state during ICCA.Due to carrying
Wave 4 still occupies (that is, the ICCA process of carrier wave 4 is blocked) by Wi-Fi system during ICCA, and therefore, carrier wave 4 is at this
It is confirmed as being not useable for transmission data block during listening to before session, and carrier wave 1 to 3 is confirmed to be and can be used for transmitting data
Block.Sending ending equipment utilizes the corresponding data block of 1 to 3 simultaneous transmission of carrier wave in synchronous transfer boundary.
In some embodiments, the corresponding LBT parameter of LBT priority type can also specify corresponding maximum transmitted to occupy
Time TXOP.If can at least one carrier wave transmitting data in multiple carrier waves by listening to process determination before session
Block then can be grouped the maximum transmitted holding time of corresponding LBT priority type based on the carrier wave where the carrier wave to transmit
Corresponding data block.As previously mentioned, in order to avoid the RF between adjacent carrier is revealed, if at least two in multiple carrier waves
A carrier wave can be used for transmission data block, it is expected that carry out data transmission on these carrier waves simultaneously (for example, transmission is started simultaneously at, and
And terminate to transmit simultaneously).In some embodiments, if at least two carrier waves that can be used for transmission data block are included in difference
Carrier wave grouping in, it means that different carrier waves, which are grouped corresponding LBT priority type, may define different TXOP.In order to
It realizes synchronous data transmission, can select minimum time value for simultaneously in these carrier waves from identified different TXOP
Transmitting data block.In other embodiments, a time value can be randomly choosed from different maximum transmitted holding times
To synchronous data transmission.
In some embodiments, it after data transmission is executed on corresponding carrier wave, can also adjust in different carrier waves
Parameter used in process is listened to before the session executed on carrier wave in grouping.Due to maximum contention window CWmax, minimum competition
Window CWmin, delay time Tdefer, the parameters such as maximum transmitted holding time TXOP be it is preconfigured, will not usually hold every time
Change after being listened to before guild's words.In some embodiments, after being listened to before executing session and data transmission (if
There is at least one carrier wave to be confirmed as can be used for transmission data block) after, adjustable each carrier wave is grouped corresponding contention window
Mouth size CWS and random back count window size N.
In one embodiment, the load where having been used for the carrier wave of transmission data block can be being adjusted based on predetermined criterion
The corresponding contention window size CWS of wavelength-division group.It is also to say, based on being listened to before previous session as a result, being used to transmission number
It is adjusted according to the corresponding parameter of the carrier wave of block.For example, in the example of hgure 5, carrier wave 1 to 3 is confirmed as being used for transmission data block.
After these carrier waves complete data transmission, the carrier wave where these adjustable carrier waves is grouped corresponding contention window size
CWS。
It in some embodiments, can be based on feedback that the data on carrier wave are transmitted, such as HARQ (the automatic weight of mixing
Pass) it feeds back and carrys out Competition adjustment window size CWS.Since HARQ feedback usually has delay, can be obtained when executing and adjusting
HARQ may be the feedback for the transmission of last time data rather than the transmission of this data.Whether for the anti-of which time data transmission
Feedback, can reflect out some channel conditions of the carrier wave.In one example, if HARQ feedback is ACK (confirmation) feedback,
Indicate that the data transmission on the carrier wave is successfully received, then can reduce the size of competition window.If HARQ feedback is
NACK (negative confirmation) feedback indicates that the data transmission on the carrier wave is not successfully received, then can increase competition window
Size.Either contention window size is increased or decreased, and is always at corresponding maximum contention window CWmaxWith most
Small competition window CWminBetween.If specific carriers grouping only includes a carrier wave, which is grouped corresponding competition window
Size can be adjusted according to the HARQ feedback on the carrier wave.If specific carriers grouping includes multiple carrier waves, the carrier wave
The HARQ feedback on multiple carrier waves can be considered simultaneously to be adjusted by being grouped corresponding contention window size.
It additionally or alternatively, can be based on the result listened to before the session on carrier wave come Competition adjustment window size
CWS.Based on listen to before the session that can be executed with this of the result listened to before session as a result, being also possible to previously to have executed
The result listened to before session.In an example, if listened to before session in process (including eCCA process and ICCA process), inspection
It measures the carrier wave and is in busy state (for example, continuous busy time slot is greater than a threshold value) on multiple continuous CCA time slots,
The size of competition window can then be increased.It alternatively or additionally, can be based on the time slot in a busy state detected
Whether sum is greater than a threshold value to determine whether the size of increase competition window.Similarly, if specific carriers grouping is only wrapped
Include a carrier wave, then the carrier wave be grouped corresponding contention window size can be according to the knot listened to before the session on the carrier wave
Fruit is adjusted.If specific carriers grouping includes multiple carrier waves, which is grouped corresponding contention window size can be same
When consider listened to before the session on each carrier wave of multiple carrier waves to be adjusted.
In some embodiments, all multiple carrier waves can be being adjusted based on predetermined criterion (that is, all carrier waves point
Group) corresponding contention window size.For example, in the example of hgure 5, not only adjusting the contention window size of carrier wave 1 to 3, also adjusting
Whole this is not used for the contention window size of the carrier wave 4 to 5 of transmission data block.With the competition window only to the carrier wave used
The adjustment of size is similar, and used predetermined criterion may include the feedback of the data transmission on carrier wave (for example, HARQ is anti-
Feedback), and/or the result listened to before session on carrier wave.In some embodiments, for being determined in being listened to before previous session
For the carrier wave being not used by, the condition to Competition adjustment window size CWS can be set to more stringent.For example, for
The given carrier wave being not used by can just reduce corresponding only when the HARQ feedback of multiple data transmission is ACK feedback
Contention window size.
In some embodiments, after the transmission of the data, each carrier wave can also be adjusted and be grouped corresponding random back meter
Number window size N.In one embodiment, the random back count window size for being decremented by being listened to before previous session
The value of N can be kept.For example, in the example of hgure 5, at LBT synchronous boundaries, the random back count window size of carrier wave 5
N5It is reduced to 1.At this point, keeping N5Random back count window size constancy (assuming that carrier wave 5 is separately included in a carrier wave
In grouping), for being listened to before the session next time for carrier wave 5.In this way, the carrier wave being not used by can be increased to exist
It is confirmed as can be used for the probability of data transmission when listening to before session next time.
In one embodiment, each carrier wave can be reset and be grouped corresponding random back count window size N.Example
Such as, corresponding contention window size CWS can be grouped in each carrier wave and determine that a pseudo random number is used as in 0 be uniformly distributed
The random back count window size N of carrier wave grouping.
Updated contention window size CWS and random back count window size can be deposited for corresponding carrier wave
Storage.If the type of service for the data transmitted on the carrier wave does not change, before executing session on the carrier wave next time
When listening to, can directly it be executed using stored CWS and random back count window size.
In described above, when listening to before multiple carrier waves are executed with session, individual LBT can be determined for each carrier wave
Parameter (for example, each carrier wave is divided into a carrier wave grouping at frame 310), can also determine public for multiple carrier waves
LBT parameter (for example, two or more carrier waves are divided into a carrier wave grouping at frame 310).Each carrier wave grouping has
The mode for sharing public LBT parameter in the mode that individual LBT parameter is used for transmission compared to multiple carrier waves, can have more
Low complexity and there is the smallest change to single carrier LBT process, and can satisfy the different numbers transmitted on each carrier wave
According to different service quality requirement.However, due to be to use different LBT parameters, the number of high priority for each carrier wave
According to high LBT priority type will be corresponded to, and thus there may be higher carrier wave access chance.It is likely difficult to ensure in this way
The quality of service requirement of the data of lower priority on other carrier waves and the carrier wave of these data access chance.This
In the case of, it can be maintained between multiple carrier waves in carrier wave access chance and carrier wave across multiple carrier waves using public LBT parameter
It is well balanced between the quality of service requirement of the data of transmission.
Although discussing the embodiment of the present invention in the environment of LTE, it should be noted that the embodiment of the present invention can be with
Other communication systems are applied to, including but not limited to: land Universal Mobile Communication System (UMTS) of wideband code division multiple access (WCDMA)
Ground wireless access (UTRA), uses following communication protocol: such as high-speed packet access (HSPA) and/or evolved HSPA
It (HSPA+), further include CDMA2000, CDMA20001X, CDMA2000EV-DO, global system for mobile communications (GSM), enhanced
GSM evolution (EDGE), GSM EDGE (GERAN) network and the support of data rate are in one or more third generation cooperation partners
Evolved UMTS Terrestrial wireless access (E-UTRA) net eated dishes without rice or wine with LTE- advanced (LTE-A) specified in plan (3GPP) specification
Network.
Fig. 6 shows the device for listening to before the session in multi-carrier transmission of one embodiment according to the disclosure
600 schematic block diagram.In some embodiments, device 600 can be user equipment (for example, UE 122 or UE 124) or
It is included among user equipment.In other embodiments, device 600 can be base station (for example, BS 110) or by
It is included among base station.
As shown in fig. 6, device 600 includes carrier wave division unit 610, it is configured as multiple carrier waves being divided at least one
Carrier wave grouping.Device 600 further includes priority determining unit 620, is configured as based on will be in each carrier wave in multiple carrier waves
The type of service of the data block of upper transmission determines that corresponding LBT is preferential for each carrier wave grouping in the grouping of at least one carrier wave
Grade type, wherein each LBT priority type corresponds to for executing the different parameters set listened to before session.Device 600 into
One step includes listening to execution unit 630, is configured as based on the corresponding parameter sets of identified LBT priority type, extremely
It is listened to before executing session on carrier wave included by each carrier wave grouping in few carrier wave grouping, in the multiple carrier waves of determination
Whether each carrier wave can be used for transmission data block.
According to one embodiment of the disclosure, carrier wave division unit 610 is configured to for multiple carrier waves being divided into
Multiple carrier wave groupings, each carrier wave grouping include a carrier wave in multiple carrier waves.
According to one embodiment of the disclosure, carrier wave division unit 610 is configured to phase on the same frequency band
At least two adjacent carrier waves are divided in a carrier wave grouping.
According to one embodiment of the disclosure, multiple carrier waves include unauthorized carrier wave.
According to one embodiment of the disclosure, priority determines that Unit 620 are further configured to determine that will be at least one
It is excellent that the type of service for the data block transmitted on carrier wave included by first carrier grouping in a carrier wave grouping corresponds to multiple LBT
First grade type；And select highest or minimum LBT priority type as first carrier point from multiple LBT priority types
The LBT priority type of group.
According to one embodiment of the disclosure, the parameter sets of each LBT priority type include at least maximum contention window
Mouth and minimum competition window.In this embodiment, listening to execution unit 630 may include contention window size determination unit,
It is configured to determine that contention window size corresponding with the grouping of each carrier wave, it is corresponding that contention window size is in carrier wave grouping
Between maximum contention window and minimum competition window in the parameter sets of LBT priority type.Execution unit 630 is listened to may be used also
To include random back count window size determination unit, it is configured as big based on the corresponding competition window of each carrier wave grouping
It is small, determine that random back count window size corresponding with carrier wave grouping, the random back count window size are indicated in determination
The accumulative clear channel assessment (CCA) time slot that carrier wave is in idle condition before carrier wave can be used for transmission data block.Listen to execution unit
630 may further include and listen to execution unit, be configured as being grouped corresponding random back count window based on each carrier wave
Size is listened to before executing session on the included carrier wave of carrier wave grouping.
According to one embodiment of the disclosure, the parameter sets of each LBT priority type are included at least for before session
The delay time listened to, delay time instruction is after clear channel assessment (CCA) is in a busy state to carrier wave under continuing
Minimum latency before clear channel assessment (CCA).In this embodiment, execution unit is listened to be configured to
It is grouped the delay time of corresponding LBT priority type based on each carrier wave, executes session on the included carrier wave of carrier wave grouping
Before listen to.
According to one embodiment of the disclosure, device 600 may further include data transmission unit, be configured to respond to
In detecting that at least one carrier wave in multiple carrier waves can be used for transmission data block, corresponding number is transmitted at least one carrier wave
According to block.
According to one embodiment of the disclosure, the parameter sets of each LBT priority type are accounted for including at least maximum transmitted
With the time, and wherein at least two carrier wave is detected as can be used for transmission data block, and at least two carrier waves are included in
In different carrier wave groupings.In this embodiment, device 600 may further include holding time determination unit, be configured
It is occupied to determine that the carrier wave including at least two carrier waves is grouped the maximum transmitted in the parameter sets of corresponding LBT priority type
Minimum time value in time.Data transmission unit can be configured to using minimum time value at least two carrier waves
On simultaneously transmit corresponding data block.
According to one embodiment of the disclosure, adjusted contention window size is used for included in corresponding carriers grouping
LBT next time is executed on carrier wave.
According to one embodiment of the disclosure, device 600 may further include contention window size adjustment unit, be matched
It is set to after transmitting corresponding data block, it is corresponding that the carrier wave grouping including at least one carrier wave is adjusted based on predetermined criterion
Contention window size or each carrier wave adjusted in the grouping of at least one carrier wave are grouped corresponding contention window size.
According to one embodiment of the disclosure, predetermined criterion is based at least one of the following: to each carrier wave point
The feedback of data transmission on the included carrier wave of group；And the LSB inspection executed on the included carrier wave of each carrier wave grouping
The result of survey.
According to one embodiment of the disclosure, device 600 may further include random back count window size adjusting
Unit is configured as after transmitting corresponding data block, and each carrier wave grouping updated in the grouping of at least one carrier wave corresponds to
Random back count window size.
According to one embodiment of the disclosure, adjusted random back count window size is used to be grouped in corresponding carriers
LBT next time is executed on included carrier wave.
As can be seen that process as shown in Figure 3 may be implemented in the device 600 of Fig. 6, and although being not further indicated,
Device 600 may include more functional units to realize multiple embodiments in conjunction with described in the process 300 of Fig. 3.
It should be noted that embodiment of the disclosure can be by the combination of hardware, software or software and hardware come real
It is existing.Hardware components can use special logic to realize；Software section can store in memory, by instruction execution appropriate
System, such as microprocessor or special designs hardware execute.It will be understood by those skilled in the art that above-mentioned sets
Standby and method can be used computer executable instructions and/or be included in the processor control code to realize, such as such as
Disk, the mounting medium of CD or DVD-ROM, the programmable memory of such as read-only memory (firmware) or such as optics or
Such code is provided in the data medium of electrical signal carrier.The equipment and its device of the disclosure can be advised by such as super large
The semiconductor or such as field programmable gate array of vlsi die or gate array, logic chip, transistor etc., can
The hardware circuit of the programmable hardware device of programmed logic equipment etc. realizes, can also be with being executed by various types of processors
Software realization can also be realized by the combination such as firmware of above-mentioned hardware circuit and software.
It should be noted that although being referred to several unit or sub-units of device in the above detailed description, this
Kind divides only not enforceable.In fact, in accordance with an embodiment of the present disclosure, the spy of two or more above-described devices
Function of seeking peace can embody in one apparatus.Conversely, the feature and function of an above-described device can be further
It is divided by multiple devices and embodies.
In addition, although describing the operation of method of disclosure in the accompanying drawings with particular order, this do not require that or
Hint must execute these operations in this particular order, or have to carry out shown in whole operation be just able to achieve it is desired
As a result.On the contrary, the step of describing in flow chart can change and execute sequence.Additionally or alternatively, it is convenient to omit certain steps,
It is that a step executes, and/or a step is decomposed into execution of multiple steps by multiple step specifications.
Although describing the disclosure by reference to several specific embodiments, it should be appreciated that, it is public that the disclosure is not limited to institute
The specific embodiment opened.The disclosure is intended to cover included various modifications and equivalent cloth in spirit and scope of the appended claims
It sets.Scope of the following claims is to be accorded the broadest interpretation, to include all such modifications and equivalent structure and function.
Claims (29)
1. listening to the method for LBT before a kind of session in multi-carrier transmission, comprising:
Multiple carrier waves are divided into the grouping of at least one carrier wave；
Based on the type of service for the data block to be transmitted on each carrier wave in the multiple carrier wave, at least one described load
Each carrier wave grouping in wavelength-division group determines corresponding LBT priority type, is used for wherein each LBT priority type corresponds to
Execute the different parameters set of the LBT；And
Each load based on the corresponding parameter sets of identified LBT priority type, in the grouping of at least one described carrier wave
The LBT is executed on carrier wave included by wavelength-division group, whether can be used for transmitting with each carrier wave in the multiple carrier wave of determination
The data block.
2. according to the method described in claim 1, wherein by multiple carrier waves be divided at least one carrier wave grouping include:
The multiple carrier wave is divided into multiple carrier wave groupings, wherein the grouping of each carrier wave includes one in the multiple carrier wave
Carrier wave.
3. according to the method described in claim 1, wherein by multiple carrier waves be divided at least one carrier wave grouping include:
At least two carrier waves adjacent on the same frequency band are divided in a carrier wave grouping.
4. according to the method described in claim 1, wherein the multiple carrier wave includes unauthorized carrier wave.
5. being determined according to the method described in claim 1, being wherein grouped for each carrier wave at least one carrier wave grouping
Corresponding LBT priority type includes:
The data block that determination will be transmitted on the included carrier wave of the first carrier grouping in the grouping of at least one described carrier wave
Type of service corresponds to multiple LBT priority types；And
Select highest or minimum LBT priority type as the first carrier point from the multiple LBT priority type
The LBT priority type of group.
6. the method according to any one of claims 1 to 5, wherein the parameter sets of each LBT priority type are at least
Including maximum contention window and minimum competition window, and
Wherein executing the LBT on the included carrier wave of each carrier wave grouping in the grouping of at least one described carrier wave includes:
Determine that contention window size corresponding with the grouping of each carrier wave, the contention window size are in carrier wave grouping and correspond to
LBT priority type parameter sets in maximum contention window and minimum competition window between；
It is grouped corresponding contention window size based on each carrier wave, determines random back number window corresponding with carrier wave grouping
Mouthful size, wherein random back count window size instruction is determining that carrier wave can be used for transmission data block foregoing description carrier wave
The accumulative clear channel assessment (CCA) time slot being in idle condition；And
It is grouped corresponding random back count window size based on each carrier wave, is held on the included carrier wave of carrier wave grouping
The row LBT.
7. according to the method described in claim 6, wherein the parameter sets of each LBT priority type are included at least for described
The delay time of LBT, delay time instruction are in a busy state later to continuing to carrier wave in clear channel assessment (CCA)
Minimum latency before clear channel assessment (CCA) next time, and
Wherein executing the LBT on the included carrier wave of carrier wave grouping further comprises:
The delay time of corresponding LBT priority type is grouped based on each carrier wave, on the included carrier wave of carrier wave grouping
Execute the LBT.
8. according to the method described in claim 6, further comprising:
It can be used for transmission data block in response at least one carrier wave detected in the multiple carrier wave, at least one described load
Corresponding data block is transmitted on wave.
9. according to the method described in claim 8, wherein the parameter sets of each LBT priority type include at least maximum transmitted
Holding time, and wherein at least two carrier wave is detected as can be used for transmission data block, and at least two carrier waves quilt
Including in different carrier wave groupings, the method further includes:
Determine to include that the carrier wave of at least two carrier wave is grouped the maximum biography in the parameter sets of corresponding LBT priority type
Minimum time value in defeated holding time, and
Wherein transmitting corresponding data block at least one described carrier wave includes:
Corresponding data block is simultaneously transmitted at least two carrier wave using the minimum time value.
10. according to the method described in claim 8, further comprising:
After transmitting corresponding data block, the carrier wave including at least one carrier wave point is adjusted based on predetermined criterion
The corresponding contention window size of group or each carrier wave adjusted at least one carrier wave grouping are grouped corresponding contention window
Mouth size.
11. according to the method described in claim 10, wherein adjusted contention window size is used to be grouped institute in corresponding carriers
Including carrier wave on execute LBT next time.
12. according to the method described in claim 10, wherein the predetermined criterion is based at least one of the following:
The feedback of data transmission on the carrier wave included to the grouping of each carrier wave；And
The result of the LBT executed on the included carrier wave of each carrier wave grouping.
13. according to the method described in claim 8, further comprising:
After transmitting corresponding data block, each carrier wave grouping updated at least one carrier wave grouping is corresponding
Random back count window size.
14. according to the method for claim 13, wherein adjusted random back count window size is for accordingly carrying
LBT next time is executed on carrier wave included by wavelength-division group.
15. listening to the device of LBT before a kind of session in multi-carrier transmission, comprising:
Carrier wave division unit is configured as multiple carrier waves being divided into the grouping of at least one carrier wave；
Priority determining unit is configured as the industry based on the data block to transmit on each carrier wave in the multiple carrier wave
Service type determines corresponding LBT priority type for each carrier wave grouping at least one carrier wave grouping, wherein each
LBT priority type corresponds to the different parameters set for executing the LBT；And
Execution unit is listened to, is configured as based on the corresponding parameter sets of identified LBT priority type, described at least one
The LBT is executed on carrier wave included by each carrier wave grouping in a carrier wave grouping, with every in the multiple carrier wave of determination
Whether a carrier wave can be used for transmitting the data block.
16. device according to claim 15, wherein be configured to will be the multiple for the carrier wave division unit
Carrier wave is divided into multiple carrier wave groupings, wherein the grouping of each carrier wave includes a carrier wave in the multiple carrier wave.
17. device according to claim 15, wherein the carrier wave division unit is configured to the same frequency
At least two adjacent carrier waves are taken to be divided in a carrier wave grouping.
18. device according to claim 15, wherein the multiple carrier wave includes unauthorized carrier wave.
19. device according to claim 16, wherein the priority determining unit is configured to:
The data block that determination will be transmitted on the included carrier wave of the first carrier grouping in the grouping of at least one described carrier wave
Type of service corresponds to multiple LBT priority types；And
Select highest or minimum LBT priority type as the first carrier point from the multiple LBT priority type
The LBT priority type of group.
20. device described in any one of 5 to 19 according to claim 1, wherein the parameter sets of each LBT priority type are extremely
Less including maximum contention window and minimum competition window, and
Listening to execution unit described in wherein includes:
Contention window size determination unit is configured to determine that contention window size corresponding with the grouping of each carrier wave, described competing
It strives window size and is in the maximum contention window and minimum that the carrier wave is grouped in the parameter sets of corresponding LBT priority type
Between competition window；
Random back count window size determination unit is configured as being grouped corresponding contention window size based on each carrier wave,
Determine random back count window size corresponding with carrier wave grouping, the random back count window size instruction is true
Determining carrier wave can be used for the accumulative clear channel assessment (CCA) time slot that transmission data block foregoing description carrier wave is in idle condition；And
Execution unit is listened to based on what random back counted, is configured as being grouped corresponding random back counting based on each carrier wave
Window size executes the LBT on the included carrier wave of carrier wave grouping.
21. device according to claim 20, wherein the parameter sets of each LBT priority type, which include at least, is used for institute
State the delay time of LBT, the delay time instruction clear channel assessment (CCA) to carrier wave it is in a busy state later to continue into
Minimum latency before capable clear channel assessment (CCA) next time, and
Wherein the execution unit of listening to is configured to be grouped the delay of corresponding LBT priority type based on each carrier wave
Time executes the LBT on the included carrier wave of carrier wave grouping.
22. device according to claim 20, further comprises:
Data transmission unit is configured to respond to detect that at least one carrier wave in the multiple carrier wave can be used for transmitting number
According to block, corresponding data block is transmitted at least one described carrier wave.
23. device according to claim 22, wherein the parameter sets of each LBT priority type include at least maximum pass
Defeated holding time, and wherein at least two carrier wave is detected as can be used for transmission data block, and at least two carrier wave
It is included in different carrier wave groupings, described device further comprises:
It is preferential to be configured to determine that the carrier wave including at least two carrier wave is grouped corresponding LBT for holding time determination unit
The minimum time value in maximum transmitted holding time in the parameter sets of grade type, and
Wherein the data transmission unit is configured to using the minimum time value at least two carrier wave
Simultaneously transmit corresponding data block.
24. device according to claim 22, further comprises:
Contention window size adjustment unit is configured as after transmitting corresponding data block, is adjusted based on predetermined criterion
Whole includes that the carrier wave of at least one carrier wave is grouped corresponding contention window size or adjusts described at least one carrier wave point
Each carrier wave in group is grouped corresponding contention window size.
25. device according to claim 24, wherein adjusted contention window size is used to be grouped institute in corresponding carriers
Including carrier wave on execute LBT next time.
26. device according to claim 24, wherein the predetermined criterion is based at least one of the following:
The feedback of data transmission on the carrier wave included to the grouping of each carrier wave；And
The result of the LBT executed on the included carrier wave of each carrier wave grouping.
27. device according to claim 22, further comprises:
Random back count window size adjusting unit is configured as after transmitting corresponding data block, described in update
Each carrier wave in the grouping of at least one carrier wave is grouped corresponding random back count window size.
28. device according to claim 27, wherein adjusted random back count window size is for accordingly carrying
LBT next time is executed on carrier wave included by wavelength-division group.
29. device according to claim 15, wherein described device includes base station or user equipment.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510623301.4A CN106559797B (en) | 2015-09-25 | 2015-09-25 | Method and apparatus for being listened to before the session in multi-carrier transmission |
| PCT/IB2016/001339 WO2017051236A1 (en) | 2015-09-25 | 2016-08-25 | Method and apparatus for listen-before-talk in multi-carrier transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510623301.4A CN106559797B (en) | 2015-09-25 | 2015-09-25 | Method and apparatus for being listened to before the session in multi-carrier transmission |
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| CN106559797B true CN106559797B (en) | 2019-09-03 |
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| CN107734713B (en) * | 2016-08-12 | 2023-05-16 | 中兴通讯股份有限公司 | Data transmission method and device |
| CN109937603B (en) * | 2017-05-03 | 2021-12-28 | 华为技术有限公司 | Contention-based transmission method and device |
| CN109151844B (en) * | 2017-06-15 | 2023-03-24 | 中兴通讯股份有限公司 | Method, terminal and system for communication between terminals |
| JP2019033375A (en) * | 2017-08-08 | 2019-02-28 | シャープ株式会社 | Communication apparatus and communication method |
| CN109392176B (en) * | 2017-08-11 | 2021-07-09 | 华为技术有限公司 | Information sending method and related equipment |
| CN112242886B (en) | 2017-11-28 | 2022-03-29 | 上海朗帛通信技术有限公司 | Method and device used in base station equipment of unlicensed spectrum |
| US10912128B2 (en) | 2018-01-23 | 2021-02-02 | Samsung Electronics Co., Ltd. | Listen-before-talk for wideband operations of NR unlicensed spectrum |
| US10951366B2 (en) | 2018-02-16 | 2021-03-16 | Qualcomm Incorporated | Uplink transmission collision management |
| CN110769463A (en) * | 2018-07-27 | 2020-02-07 | 索尼公司 | Electronic device, wireless communication method, and computer-readable medium |
| EP3836433A4 (en) | 2018-08-10 | 2021-08-04 | Beijing Xiaomi Mobile Software Co., Ltd. | Monitoring method and apparatus, device, and storage medium |
| US11375542B2 (en) * | 2019-04-08 | 2022-06-28 | Qualcomm Incorporated | Multi-sub-band LBT operation |
| US11849482B2 (en) * | 2019-09-13 | 2023-12-19 | Qualcomm Incorporated | Synchronization of listen before talk back-off for synchronous access in unlicensed spectrum |
| CN114616902A (en) * | 2020-03-17 | 2022-06-10 | 北京小米移动软件有限公司 | Communication method, device, equipment and readable storage medium |
| CN116939799A (en) * | 2022-04-02 | 2023-10-24 | 维沃移动通信有限公司 | Carrier wave determining method, device, terminal and readable storage medium |
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