CN105611639A - Methods and device for realizing listen-before-talk - Google Patents
Methods and device for realizing listen-before-talk Download PDFInfo
- Publication number
- CN105611639A CN105611639A CN201410625504.2A CN201410625504A CN105611639A CN 105611639 A CN105611639 A CN 105611639A CN 201410625504 A CN201410625504 A CN 201410625504A CN 105611639 A CN105611639 A CN 105611639A
- Authority
- CN
- China
- Prior art keywords
- channel
- auxiliary detection
- data
- subframe
- symbol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
Embodiments of the invention provide methods and a device for realizing listen-before-talk. One method according to the embodiments of the invention comprises the steps of determining whether a channel is clear in response to scheduling grant information from receiving equipment and transmitting data on the channel in response to determining that the channel is clear. The other method according to the embodiments of the invention comprises the steps of sending scheduling grant information to sending equipment and determining transmission of data from the sending equipment in response to the detection of an auxiliary detection reference signal from the sending equipment.
Description
Technical field
The present invention relates to the communications field, particularly for accessing based on authorizing carrier wave to assistBefore realizing session in the LTE system of (Licensed-AssistedAccess, LAA), interceptThe method and apparatus of (Listen-Before-Talk, LBT).
Background technology
Along with to need to progressively the increasing of broadband wireless data, increasing Cellular Networks operatorShared channel is considered as to the means of supplementing out economy that increase its professional ability. With use exclusively channelMode difference, some channels can be shared by multiple radio assess stations, unauthorized letterRoad is an example of this channel.
At present, use the system of this channel being shared more and more to be paid close attention toAnd research. Especially, use based on authorizing the auxiliary access of carrier wave (Licensed-AssistedAccess, LAA) LTE system extensively inquired into.
For LAA-LTE system, the key point of design is to guarantee that LAA can be at unauthorizedIn channel on the basis of " equality " and " close friend " from other operators and different access skillArt coexists. Zones of different has different management expectancys for unauthorized channel operation. For example,In some region, require the equipment on unauthorized channel of operating in before transmission, to pass through startingCarrying out clear channel assessment (CCA) (ClearChannelAssessment, CCA) implements before sessionIntercept (LBT), so that whether the channel of verification operation is occupied. Conventionally there are following two kinds of LBTType: the equipment (Frame-BasedEquipment, FBE) based on frame and based on loadEquipment (Load-BasedEquipment, LBE). For FBE, fixing every oneFrame period is carried out CCA, if channel is unavailable, before next channel access chance, sends outThe machine of penetrating will wait the whole cycle. For LBE, once obtain channel access, base station will be carried outCCA, if channel is unavailable, base station will carry out expansion CCA (ExtendedCCA,ECCA). Once base station has obtained channel and implemented transmission, eCCA need to be carried out in base stationThereby again access channel. Owing to using each base station sensing at any time of LBEChannel, so than the access based on FBE, the access based on LBE is for differenceThe base station of operator more fair. Table 1 show LBE permission Channel holding time andStandby time.
Permission Channel holding time and the standby time of table 1LBE
In the situation that LBE accesses, in up-link, LAA-LTE subscriber equipment (UE)Need to carry out clear channel assessment (CCA), for example CCA or eCCA, determine whether channel can be used.Owing to experiencing the randomness of disturbing in unauthorized channel, LAA-LTEUE may be at oneAny time requirement carrying of the centre of subframe, therefore clear channel assessment (CCA) end differingDetermine and the border of OFDM symbol or the boundary alignment of subframe. In this case, ifLAA-LTEUE waits for until next symbol or frame boundaries start transmission again, letterOther UE that road is likely performed clear channel assessment (CCA) take. Thus, LAA-LTEUENeed to after channel idle, take as early as possible this channel and carry out transfer of data. But, existingIn technology, do not there is such LBT solution.
Therefore, need a kind of solution of intercepting before session that realizes, to allow for such as notThe channel of authorization channel and so on carries out effectively and flexibly using.
Summary of the invention
For above problem, the invention provides a kind of for realizing the solution party who intercepts before sessionCase.
According to a first aspect of the invention, provide a kind of for realizing session at transmitting apparatus placeBefore the method intercepted. The method comprises: in response to the scheduling authorization information from receiving equipment,Determine that whether channel is idle; And be idle in response to definite channel, actual figure on channelReportedly defeated.
According to a second aspect of the invention, provide a kind of for realizing session at receiving equipment placeBefore the method intercepted. The method comprises: send scheduling authorization message to transmitting apparatus; And ringYing Yu detects the auxiliary detection reference signal from transmitting apparatus, determines from transmitting apparatusThe transmission of data.
According to a third aspect of the invention we, provide a kind of for realizing the device of intercepting before session.This device comprises: determining unit, is configured in response to the scheduling authorization letter from receiving equipmentBreath, determines that whether channel is idle; And transmission unit, be configured in response to definite channel beIdle, performing data transmission on channel. This device can be realized at transmitting apparatus place.
According to a forth aspect of the invention, provide a kind of for realizing the device of intercepting before session.This device comprises: authorize transmitting element, be configured to send scheduling authorization message to transmitting apparatus;And determining unit, be configured in response to the auxiliary detection reference detecting from transmitting apparatusSignal, determines the transmission from the data of transmitting apparatus. This device can be realized at receiving equipmentPlace.
By the description of the preferred embodiment to the explanation principle of the invention below, and by reference to the accompanying drawings,Other features of the present invention and advantage will be apparent.
Brief description of the drawings
By below in conjunction with the description of the drawings, and along with understanding more comprehensively of the present invention, thisOther objects of invention and effect will become more clear and should be readily appreciated that, wherein:
Fig. 1 is according to an embodiment of the invention for realizing the method for intercepting before session100 flow chart;
Fig. 2 is according to an embodiment of the invention for realizing the method for intercepting before session200 flow chart;
Fig. 3 is according to an embodiment of the invention for realizing the method for intercepting before session300 flow chart;
Fig. 4 is according to an embodiment of the invention for realizing the frame structure of intercepting before session400 schematic diagram;
Fig. 5 is according to an embodiment of the invention for realizing the device of intercepting before session500 block diagram; And
Fig. 6 is according to an embodiment of the invention for realizing the device of intercepting before session600 block diagram.
Detailed description of the invention
The principle of theme described here is described referring now to some example embodiment. ShouldUnderstand, describe these embodiment just for make those skilled in the art can understand better intoAnd realize theme described here, and not limit by any way the model of theme described hereEnclose.
It should be noted in the discussion above that term " transmitting apparatus " can comprise any type as used hereinDispensing device and transmitting system. For example, transmitting apparatus can be subscriber equipment, base station andAny can executing data and/or other equipment of signalling.
Term " receiving equipment " can comprise the receiving system of any type and connect as used hereinReceipts system. For example, receiving equipment can be subscriber equipment, base station and any can actual figureAccording to and/or signaling receive other equipment.
As used herein term " subscriber equipment " (UE) refer to can be with base station communication anyEquipment. As example, UE can comprise terminal, mobile terminal (MT), subscriber stations (SS),Portable subscriber platform (PSS), travelling carriage (MS) or access terminal (AT) etc.
As used herein term " base station " (BS) can represent Node B (NodeB orNB), enode b (eNodeB or eNB), remote radio unit (RRU),Radio-frequency maser (RH), far end radio frequency head (RRH), repeater, low power nodes, such asFemto base station, femto base station etc.
Term " comprises " and is out of shape to be that opening comprises as used herein, " comprises but does not limitIn ". Term "based" is " at least in part based on ". Expression " extremely for term " embodiment "A few embodiment "; Term " another embodiment " expression " embodiment that at least one is other ". ItsDuring will be described below, the related definition of his term provides.
It should be noted, although embodiments of the invention have mainly used Long Term Evolution (LTE)System and LAA-LTE system are described as example, but this is only exemplary,Technical scheme of the present invention can be applied to other suitable existing or following systems completely.
Fig. 1 shows according to an embodiment of the invention for realizing the side of intercepting before sessionThe flow chart of method 100. Embodiment shown in Fig. 1 can be by transmitting apparatus or for this areaOther any suitable devices that technical staff can use are carried out.
Method 100 starts from step S110, at this step place, in response to from receiving equipmentScheduling authorization information, determines that whether channel is idle.
According to embodiments of the invention, can determine in several ways that whether channel is idle.In one exemplary embodiment, can come in response to the scheduling authorization information from receiving equipmentCarry out clear channel assessment (CCA) for channel. Then, can transmit continuously can be used for transmitting apparatusAll subframes in, detect from other transmitting apparatus that carry out transfer of data to receiving equipmentAuxiliary detection reference signal. Carrying out clear channel assessment (CCA) and to auxiliary detection reference signalAfter detection, can determine that whether channel is idle based on the two.
Determine that based on clear channel assessment (CCA) and the auxiliary detection reference signal detecting channel isThe process of no free time can realize by several different methods, for example, can believe according to the free timeThe first energy of channel is assessed to obtain in road, the energy of for example whole bandwidth, and according to auxiliary inspectionSurvey reference signal and estimate the interference from other transmitting apparatus, then can be based on obtainedThe first energy and calculate the channel energy of described channel from the interference of other transmitting apparatus. LogicalCross calculated channel energy and predetermined threshold are compared, can determine that whether channel is idle.In one embodiment, when the channel energy calculating is during lower than predetermined threshold, can think letterRoad is idle. Details is described in connection with the embodiment shown in Fig. 2 more specifically.
At step S120, be idle in response to definite channel, performing data on this channelDefeated.
According in some embodiments of the present invention, when determine channel in step S110 beIn idle situation,, in step S120, as the response to this, transmitting apparatus canSend auxiliary detection reference signal, carry out transmission data so that receiving equipment is determined transmitting apparatusStarting point. On the other hand, transmitting apparatus sends auxiliary detection reference signal, contributes toOther transmitting apparatus are determined the interference from this transmitting apparatus.
In other embodiment according to the present invention, when determine channel in step S110In idle situation, especially, if at the son for sending auxiliary detection reference signalIt is idle that a symbol place in frame determines described channel,, in step S120, sends outSend equipment can utilize the symbol after and then this symbol in this subframe to send leading letterNumber, to indicate this channel occupied, thereby other transmitting apparatus can be known this channel and useIn this transmitting apparatus, the generation that can avoid conflict thus. Then, transmitting apparatus can be in order toWith the one or more symbols after the symbol for sending targeting signal in this subframe, comeSend auxiliary detection reference signal, so that receiving equipment is identified for sending auxiliary detection with reference to letterNumber subframe in for transmitting the symbol of data, for example this sign-on in where, which isSymbol, etc.
According to embodiments of the invention, on channel, before performing data transmission, can enter dataRow coding. The mode of coding can be passed through implemented in many forms. In one embodiment, canBeing independent of the mode of the data in next subframe, to for sending auxiliary detection reference signalThe data for the symbol that transmits data in subframe are encoded. In another embodiment,Can with next subframe in data same way, to for sending auxiliary detection reference signalSubframe in the data for the symbol that transmits data carry out combined coding. Real at anotherExecute in example, can the subframe for sending auxiliary detection reference signal for transmitting dataSymbol in transmit the redundancy versions of the coded data in next subframe.
It should be noted in the discussion above that above-mentioned data encoding mode is only for example, is not for thisThe restriction of invention. Those skilled in the art are appreciated that can adopt with in upper type completelyThe combination of any or any two or more modes is encoded to data, also canAdopt other modes known in the art to encode to data.
Fig. 2 shows according to an embodiment of the invention for realizing the side of intercepting before sessionThe flow chart of method 200. Embodiment shown in Fig. 2 is that of the embodiment shown in Fig. 1 is concreteImplementation. Method 200 can be used by transmitting apparatus or for those skilled in the artOther any suitable devices are carried out. In one embodiment, method 100 or method 200Can be carried out by UE.
At step S210, in response to the scheduling authorization information from receiving equipment, hold for channelRow clear channel assessment (CCA).
According to embodiments of the invention, by carrying out clear channel assessment (CCA), can obtain channelThe first energy, the energy of for example whole bandwidth. According in some embodiments of the present invention, skyIdle channel is assessed first sign-on of the subframe that can always be assigned with from first.
According to other embodiments of the invention, taking LTE system as example, if immediately spySubframe after different subframe is scheduled for ul transmissions, and described clear channel assessment (CCA) canWith first sign-on of the uplink pilot time slot from special subframe. If immediately specialSubframe after subframe is not scheduled for ul transmissions, and described clear channel assessment (CCA) canWith first sign-on of the uplink sub-frames that is assigned with from first.
According to one embodiment of present invention, transmitting apparatus can be under LAA-LTE systemUE. Now, receiving equipment can be the base station of this UE of service. From the scheduling authorization of base stationInformation can be for example uplink scheduling grant (ULschedulinggrant) message. Now,For channel can be for example unauthorized channel. Comment for the idle channel that channel is performedEstimate and for example can comprise at least one in CCA and eCCA. In step S210, UECan, in response to the ULschedulinggrant message from base station, unauthorized channel be carried outCCA and/or eCCA.
At step S220, can be used in all subframes of the continuous transmission of transmitting apparatus, detect nextFrom the auxiliary detection reference signal of other transmitting apparatus of receiving equipment being carried out to transfer of data.
According to embodiments of the invention, based on the detected auxiliary detection reference of step S220Signal, this transmitting apparatus can estimate that other transmitting apparatus of communicating by letter with receiving equipment are for oneselfInterference.
According to one embodiment of present invention, when transmitting apparatus is the UE under LAA-LTE system,And when receiving equipment is the base station of this UE of service, this auxiliary detection reference signal can be for exampleUp-link is found reference signal (UL-DRS). In step S220, UE can be canFor its continuous all subframes of transmission, detect from carry out other of transfer of data to base stationThe UL-DRS of UE, thus this UE can estimate with other UE of base station communication to oneselfDisturb.
At step S230, the auxiliary detection reference signal based on clear channel assessment (CCA) and detection is come reallyWhether idlely determine channel.
As mentioned above, can obtain the first energy of channel by step S210, and by stepRapid S220 can estimate the interference from other transmitting apparatus. Thus, at step S230,Can, based on the first energy with from the interference of other transmitting apparatus, calculate the channel energy of this channelAmount. This computational process can realize in several ways. For example, can be from the first energyIn deduct the interference from other transmitting apparatus, thereby obtain channel energy. Then, can be byThe channel energy calculating is compared with predetermined threshold. When channel energy is during lower than predetermined threshold,Can determine that channel is idle. Predetermined threshold can be that those skilled in the art are according to systemRequirement or next predefined according to existing specification, and predetermined threshold can be stored in transmissionIn any storage device that equipment can obtain.
According to one embodiment of present invention, when transmitting apparatus is the UE under LAA-LTE system,And when receiving equipment is the base station of this UE of service, UE can be at step S230 based on stepThe CCA of S210 and/or eCCA and the UL-DRS detecting in step S220 come reallyWhether idlely determine channel.
At step S240, be idle in response to definite channel, send auxiliary detection reference signal.
According to embodiments of the invention, auxiliary detection reference signal can be comprise one or moreThe receiving equipment specific reference signals sequence of symbol, this receiving equipment specific reference signals sequence canTo repeat in the Resource Block being assigned with. According to embodiments of the invention, for sending auxiliary inspectionThe number of symbol of surveying reference signal is can be predefined, can be also by from describedThe signal deployment of receiving equipment.
According to embodiments of the invention, before sending auxiliary detection reference signal, as optionalStep, can send targeting signal. For example, can be in response to a symbol in subframeNumber locate to determine that described channel is idle, before utilizing symbol after described symbol and then to sendLead signal. Then, can utilize after the symbol for sending described targeting signalOr multiple symbols, send auxiliary detection reference signal. In this way, can be conducive toReceiving equipment determine in subframe for transmitting the symbol of data, and can make this transmission establishThe standby interference of avoiding being subject to other transmitting apparatus. For example, can make in LAA-LTE systemUE avoid other UE in Yu Tong community to clash on same channel.
The transmission that it should be noted in the discussion above that targeting signal is optional. In enforcement according to the present inventionIn example, also can be in the situation that not sending targeting signal and directly send auxiliary detection with reference to letterNumber, for example UL-DRS.
At step S250, performing data transmission on channel.
As mentioned above, data can be passed through the given side of embodiments of the invention before transmissionThe existing mode in formula or this area is encoded. For example, can be with following one or moreMode is encoded to data: mode one, and to be independent of the mode of the data in next subframe,To subframe for sending auxiliary detection reference signal for transmitting the symbol of dataData are encoded; Mode two, with next subframe in data same way, to for send outSend the data for the symbol that transmits data in the subframe of auxiliary detection reference signal to carry outCombined coding; And mode three, in the use of the subframe for sending auxiliary detection reference signalIn the symbol of transmission data, transmit the redundancy versions of the coded data in next subframe. CanAdopt different coded systems to encode to data according to concrete performance. According to thisBright embodiment, if the number of the remaining OFDM symbol in subframe is fewer, exampleAs be less than admissible, for the number of the OFDM symbol of independent data coding, canThe a pair of data of employing mode are encoded; Otherwise, can occupation mode two encode.
Then method 200 finishes.
Fig. 3 is according to an embodiment of the invention for realizing the method for intercepting before session300 flow chart. Embodiment shown in Fig. 3 can be by receiving equipment or for this area skillOther any suitable devices that art personnel can use are carried out.
At step S310, send scheduling authorization message to transmitting apparatus.
According to embodiments of the invention, scheduling authorization message can indicate transmitting apparatus to carry out dataA subframe or multiple continuous subframes that transmission is used.
In one embodiment, method 300 can be carried out by base station, is also that receiving equipment isBase station, transmitting apparatus is UE. In this embodiment, in step S310, base station can be toUE sends scheduling authorization message, for example uplink scheduling grant (ULschedulinggrant)Message.
At step S320, in response to the auxiliary detection reference signal detecting from transmitting apparatus,Determine the transmission from the data of transmitting apparatus.
According to embodiments of the invention, when transmitting apparatus is the UE under LAA-LTE system, andWhen receiving equipment is the base station of this UE of service, when base station detects the auxiliary detection from UEWhen reference signal, can estimate to transmit in the subframe of auxiliary detection reference signal for transmitting numberAccording to the number of symbol, and obtain this data, then carry out the operations such as decoding and storage. AsFruit base station does not detect the auxiliary detection reference signal from UE, thinks that UE does not passDefeated chance.
According to embodiments of the invention, for sending the number of symbol of auxiliary detection reference signalCan be predefined, can be to be also configured by the signaling from receiving equipment. ExampleAs, in order to reduce the signaling consumption of scheduling authorization message, can adopt across subframe scheduling. At thisIn situation, transmitting apparatus can transmit data in multiple continuous subframes. These continuous subframes altogetherEnjoy this scheduling authorization message.
As optional step, method 300 can also transmit signaling to described transmitting apparatus, with rightThe number that is used for the symbol that sends described auxiliary detection reference signal is configured.
Fig. 4 is according to an embodiment of the invention for realizing the frame structure of intercepting before session400 schematic diagram.
Below taking LAA-LTE system as example, for the up-link of time division duplex (TDD)Transmission is described. Particularly, Fig. 4 shows the LAA-LTE system in unauthorized carrier waveThe schematic diagram of the frame structure in system.
In the embodiment shown in fig. 4, UE can share one of scheduling authorization message orIn multiple continuous subframes, send data. Base station sends uplink in PDCCH or ePDCCHThe DCI message that road is relevant, indicates: for the PUSCH transfer of data of UE1 and UE2Can use the virtual RB in the virtual RB collection 1 HeLAACong community in LAACong communityCollection 2 occurs in subframe 4 in subframe 2 simultaneously.
After receiving uplink scheduling grant message from base station, UE1 and UE2 carry outClear channel assessment (CCA), for example CCA or eCCA, and in whole bandwidth blind check subframe 2In the UL-DRS signaling from the UE in same cells.
For UE1, after carrying out clear channel assessment (CCA) during the 4th symbol of subframe 2,Channel is available. When the stop position of clear channel assessment (CCA) and the 4th symbol of subframe 2When border does not line up, can send a short targeting signal, to accord with in the residue of subframe 2In number, obtain immediately channel. This can guarantee that other UE learn that this channel is occupied. SoAfter, auxiliary detection reference signal, for example UL-DRS, can be at the 5th of subframe 2 symbolIn be sent to base station. Subsequently, on virtual RB collection 2, data will be continuously delivered toBase station, until the end of subframe 4.
For UE2, from the UL-DRS of UE1 in the subframe 2 of virtual RB collection 15 symbol places are detected. UE2 is the interference level of estimating on virtual RB collection 1, asIn community, disturb. For clear channel assessment (CCA), UE2 will remove community from the energy detectingInterior interference, is used as channel energy. During the 7th symbol of subframe 2, UE2 success is completeBecome clear channel assessment (CCA), and channel is available. When the stop position of clear channel assessment (CCA) withWhen the 7th symbol aligned of subframe 2, do not need short targeting signal to obtain channel. UE2 willUL-DRS sends out together with the coded data in the 8th symbol of the subframe 2 of virtual RB collection 2Deliver to the base station of this UE of service. Then,, on virtual RB collection 2, data will be by continuouslyBe sent to base station, until the end of subframe 4.
In an embodiment according to the present invention, UL-DRS can comprise multiple UL-DRS sequences,It is in the upper repetition of distributed frequency resource block (RB). Each UL-DRS sequence can beUse the specific reference signal sequence in community and the RB of one or more symbols.
For data encoding, can adopt above-mentioned Multi-encoding mode. For example, suppose predetermined thresholdValue is 7, in subframe 2, can be independent of next subframe for the data of UE1 and encode,And in subframe 2 for the data of UE2 can be together with next subframe combined coding.
Base station by receive and monitor on corresponding up-link running time-frequency resource for each UE'sUL-DRS. First, the UL-DRS of UE1 is detected in base station in the 5th symbol of subframe 2.Then, base station is (for example sub at surplus resources by all data of the UE1 on virtual RB collection 16-14 symbol of frame 2 and subframe 3 and subframe 4) in buffer memory decoding. Meanwhile, baseStand in the UL-DRS that detects UE2 in the 8th symbol of subframe 2. Then, base station is by virtualThe all data of UE2 on RB collection 2 for example, at surplus resources (9-14 of subframe 2 symbolNumber and subframe 3 and subframe 4) in buffer memory and decoding.
Fig. 5 is according to an embodiment of the invention for realizing the device of intercepting before session500 block diagram. Embodiment shown in Fig. 5 can realize at transmitting apparatus place. According to thisIn bright embodiment, transmitting apparatus can be UE.
As shown in the figure, device 500 can comprise determining unit 510, is configured in response to comingFrom the scheduling authorization information of receiving equipment, determine that whether channel is idle; And transmission unit 520,It is idle being configured in response to definite channel, performing data transmission on channel.
According to embodiments of the invention, determining unit 510 can comprise: assessment unit, joinedBe set to for channel and carry out clear channel assessment (CCA); And detecting unit, be configured to can be used forIn all subframes that transmitting apparatus transmits continuously, detect from receiving equipment is carried out to transfer of dataThe auxiliary detection reference signal of other transmitting apparatus. This determining unit 510 can be further byThe auxiliary detection reference signal being configured to based on clear channel assessment (CCA) and detection determines that channel isThe no free time.
According to embodiments of the invention, the use if the subframe immediately after special subframe is scheduledIn ul transmissions, the uplink pilot time slot that clear channel assessment (CCA) can be from special subframeFirst sign-on. If the subframe immediately after special subframe is not scheduled forUplink transmission, the uplink sub-frames that clear channel assessment (CCA) can be assigned with from firstFirst sign-on.
According to embodiments of the invention, clear channel assessment (CCA) can always be assigned with from firstFirst sign-on of subframe.
According to embodiments of the invention, determining unit 510 can comprise: acquiring unit, joinedBe set to the first energy that obtains channel according to clear channel assessment (CCA); Compensation unit, is joinedBe set to according to auxiliary detection reference signal and estimate the interference from other transmitting apparatus; Calculate singleUnit, be configured to based on the first energy with from the interference of other transmitting apparatus, calculates channelChannel energy; And comparing unit, be configured to when channel energy is during lower than predetermined threshold, reallyIt is idle determining channel.
According to embodiments of the invention, auxiliary detection reference signal can be comprise one or moreThe receiving equipment specific reference signals sequence of symbol, receiving equipment specific reference signals sequence is at quiltIn the Resource Block distributing, repeat.
According to embodiments of the invention, for sending the number of symbol of auxiliary detection reference signalCan be predefined, or can be by the signal deployment from receiving equipment.
According to embodiments of the invention, transmission unit 520 can comprise: transmitting element, joinedBe set to and send auxiliary detection reference signal, carry out transmission so that receiving equipment is determined transmitting apparatusThe starting point of data.
According to embodiments of the invention, transmission unit 520 can comprise: the first transmitting element,Be configured to a symbol in response to the subframe for sending auxiliary detection reference signalPlace determines that channel is idle, utilizes and then symbol symbol afterwards to send targeting signal, withIndicating channel is occupied; And second transmitting element, be configured to utilize for before sendingLead the one or more symbols after the symbol of signal, send auxiliary detection reference signal, withJust receiving equipment be identified for sending in the subframe of auxiliary detection reference signal for transmitting numberAccording to symbol.
According to embodiments of the invention, transmission unit 520 can also comprise coding unit, is joinedBe set at least one that carries out with lower: to be independent of the mode of the data in next subframe, rightFor send auxiliary detection reference signal subframe for transmitting the number of symbol of dataAccording to encoding; With with next subframe in data same way, to for sending auxiliary detectionThe data for the symbol that transmits data in the subframe of reference signal are carried out combined coding; WithAnd the subframe for sending auxiliary detection reference signal for transmitting the symbol of dataTransmit the redundancy versions of the coded data in next subframe.
Fig. 6 is according to an embodiment of the invention for realizing the device of intercepting before session600 block diagram. Embodiment shown in Fig. 6 can realize at receiving equipment place. According to thisIn bright embodiment, transmitting apparatus can be BS.
As shown in the figure, device 600 can comprise: authorize transmitting element, be configured to transmissionEquipment sends scheduling authorization message; And data determining unit, be configured in response to detectingFrom the auxiliary detection reference signal of transmitting apparatus, determine the transmission from the data of transmitting apparatus.
According to embodiments of the invention, scheduling authorization message can indicate transmitting apparatus to carry out dataA subframe or multiple continuous subframes that transmission is used.
According to embodiments of the invention, device 600 can also comprise signaling transmitting element, is joinedBe set to transmitting apparatus and transmit signaling, with the symbol to for sending auxiliary detection reference signalNumber is configured.
Should be appreciated that structured flowchart described in Fig. 5 and Fig. 6 be just to the object of example andIllustrating, is not limitation of the present invention. In some cases, can add as requiredOr reduce some device/unit wherein.
In device 500 and 600, included unit can utilize variety of way to realize, and comprisesSoftware, hardware, firmware or its any combination. In one embodiment, one or more unitCan realize with software and/or firmware, the machine being for example stored on storage medium can be carried outInstruction. Except machine-executable instruction or as an alternative, device 500 and/or 600In some or all of unit can be at least in part by one or more hardware logic assembliesRealize. As example and unrestricted, the hardware logic assembly bag of operable exemplary typeDraw together field programmable gate array (FPGA), special IC (ASIC), application specific standardProduct (ASSP), SOC(system on a chip) (SOC), CPLD (CPLD),Etc..
Generally speaking, the various example embodiment of theme described here can be at hardware or specialCircuit, software, logic, or implement in its any combination. Some aspect can be real in hardwareExecute, and other aspects can be able to carried out by controller, microprocessor or other computing equipmentsFirmware or software in implement. Be illustrated when the each side of the embodiment of theme described here orWhen being described as block diagram, flow chart or using some other diagrammatic representation, will understand described hereinSquare frame, device, system, technology or method can be used as nonrestrictive example at hardware, softPart, firmware, special circuit or logic, common hardware or controller or other computing equipments, orIn its some combination, implement.
As example, what the embodiment of theme described here can be at machine-executable instruction is upperHereinafter be described, machine-executable instruction is such as the true or virtual processing that is included in targetIn the program module of carrying out in device on device. Generally speaking, program module comprises routine, journeyOrder, storehouse, object, class, assembly, data structure etc., it carries out specific task or realizationSpecific abstract data structure. In each embodiment, the function of program module can describeProgram module between merge or cut apart. Machine-executable instruction for program module canIn this locality or distributed apparatus, carry out. In distributed apparatus, program module can be positioned atLocal and remote storage medium is in the two.
The computer program code that is used for the method that realizes theme described here can be with a kind ofOr multiple programming language is write. These computer program codes can offer all-purpose computer,The processor of special-purpose computer or other programmable data treating apparatus, exists program codeWhen execution by computer or other programmable data treating apparatus, cause at flow chart and/ or block diagram in function/operation of specifying be implemented. Program code can be completely on computers,Part on computers, as software kit independently, part on computers and part long-rangeOn computer or completely, on remote computer or server, carry out.
In context of the present disclosure, machine readable media can be comprise or store for or haveAbout any tangible medium of the program of instruction execution system, device or equipment. Machine readable is situated betweenMatter can be machine-readable signal medium or machinable medium. Machine readable media canInclude but not limited to electronics, magnetic, optics, electromagnetism, infrared or semiconductor system,Device or equipment, or the combination of its any appropriate. The more detailed example of machinable mediumComprise with the electrical connection of one or more wire, portable computer diskette, hard disk, withMachine memory access device (RAM), read-only storage (ROM), erasable programmable are read-onlyMemory (EPROM or flash memory), light storage device, magnetic storage apparatus, or it closes arbitrarilySuitable combination.
In addition, although operation is described with particular order, this also should not be construed and require thisGeneric operation is with the particular order that illustrates or complete with sequential order, or carries out all illustrated behaviourDo to obtain expected result. In some cases, multitask or parallel processing meeting are useful.Similarly, although above-mentioned discussion has comprised some specific implementation detail, this should not explainFor limiting the scope of any invention or claim, and should be interpreted as can be for specific inventionThe description of specific embodiment. In this description, in the context of the embodiment separating, describeSome feature also can combined implementation in single embodiment. Otherwise, upper at single embodimentThe various features of hereinafter describing also can be discretely at multiple embodiment or in any appropriateIn sub-portfolio, implement.
Although with the language description specific to the action of architectural feature and/or method theme,To should be appreciated that theme defined in the appended claims is not limited to above-described specific spyLevy or move. On the contrary, above-described special characteristic and action are as realizing claimExemplary form is disclosed.
Claims (26)
1. the method for intercepting before transmitting apparatus place realizes session, comprising:
In response to the scheduling authorization information from receiving equipment, determine that whether channel is idle; And
Idle in response to definite described channel, performing data transmission on described channel.
2. method according to claim 1, wherein determine whether the free time comprises channel:
Carry out clear channel assessment (CCA) for described channel;
Can be used for described transmitting apparatus continuously in all subframes of transmission, detect to describedReceiving equipment carries out the auxiliary detection reference signal of other transmitting apparatus of transfer of data; And
Described auxiliary detection reference signal based on described clear channel assessment (CCA) and detection is determinedWhether described channel is idle.
3. method according to claim 2, if wherein immediately after special subframeSubframe is scheduled for ul transmissions, and described clear channel assessment (CCA) is from special subframeFirst sign-on of uplink pilot time slot, and if wherein immediately after special subframeSubframe be not scheduled for ul transmissions, described clear channel assessment (CCA) is from first quiltFirst sign-on of the uplink sub-frames distributing.
4. method according to claim 2, wherein said clear channel assessment (CCA) is always fromFirst sign-on of a subframe being assigned with.
5. method according to claim 2, wherein based on described clear channel assessment (CCA) and inspectionThe described auxiliary detection reference signal of surveying determines whether the free time comprises described channel:
Obtain the first energy of described channel according to described clear channel assessment (CCA);
Estimate doing from described other transmitting apparatus according to described auxiliary detection reference signalDisturb;
Based on described the first energy with from the interference of described other transmitting apparatus, calculate described letterThe channel energy in road; And
When described channel energy is during lower than predetermined threshold, determine that described channel is idle.
6. method according to claim 2, wherein said auxiliary detection reference signal is bagThe receiving equipment specific reference signals sequence of drawing together one or more symbols, described receiving equipment is specificReference signal sequence repeats in the Resource Block being assigned with.
7. method according to claim 2, wherein for sending described auxiliary detection referenceThe number of the symbol of signal is predefined, or by the signaling from described receiving equipmentConfiguration.
8. method according to claim 1 is wherein idle in response to definite described channel, on described channel, performing data transmission comprises:
Send auxiliary detection reference signal, so that described receiving equipment is determined described transmitting apparatusCarry out the starting point of transmission data.
9. method according to claim 1 is wherein idle in response to definite described channel, on described channel, performing data transmission comprises:
A symbol place in response to the subframe for sending auxiliary detection reference signal is trueFixed described channel is idle, utilizes and then described symbol symbol afterwards to send targeting signal,To indicate described channel occupied; And
Utilize the one or more symbols after the symbol for sending described targeting signal, comeSend auxiliary detection reference signal, described for sending auxiliary inspection so that described receiving equipment is determinedSurvey in the subframe of reference signal for transmitting the symbol of data.
10. method according to claim 1 is wherein empty in response to definite described channelNot busy, on described channel, performing data transmission comprises:
To be independent of the mode of the data in next subframe, to for sending auxiliary detection with reference to letterNumber subframe in the data for the symbol that transmits data encode;
With with next subframe in data same way, to for sending auxiliary detection reference signalSubframe in the data for the symbol that transmits data carry out combined coding; And
The subframe for sending auxiliary detection reference signal for transmitting the symbol of dataThe redundancy versions of the coded data in next subframe of middle transmission.
11. 1 kinds of methods for intercepting before receiving equipment place realizes session, comprising:
Send scheduling authorization message to transmitting apparatus; And
In response to the auxiliary detection reference signal detecting from described transmitting apparatus, determine fromThe transmission of the data of described transmitting apparatus.
12. methods according to claim 11, wherein said scheduling authorization message is indicated instituteState transmitting apparatus and carry out a subframe or the multiple continuous subframes that transfer of data is used.
13. methods according to claim 11, also comprise:
Transmit signaling to described transmitting apparatus, with to for sending described auxiliary detection reference signalThe number of symbol be configured.
14. 1 kinds for realizing the device of intercepting before session, comprising:
Determining unit, is configured in response to the scheduling authorization information from receiving equipment, determinesWhether channel is idle; And
Transmission unit, it is idle being configured in response to definite described channel, at described channelUpper performing data transmission.
15. devices according to claim 14, wherein said determining unit comprises:
Assessment unit, is configured to carry out clear channel assessment (CCA) for described channel; And
Detecting unit, is configured to can be used for described transmitting apparatus all subframes of transmission continuouslyIn, detect from the auxiliary inspection of other transmitting apparatus of described receiving equipment being carried out to transfer of dataSurvey reference signal;
Wherein said determining unit is further configured to based on described clear channel assessment (CCA) and inspectionThe described auxiliary detection reference signal of surveying determines that whether described channel is idle.
16. devices according to claim 15, if wherein immediately after special subframeSubframe be scheduled for ul transmissions, described clear channel assessment (CCA) is from special subframeFirst sign-on of uplink pilot time slot, and if wherein immediately special subframe itAfter subframe be not scheduled for ul transmissions, described clear channel assessment (CCA) is from firstFirst sign-on of the uplink sub-frames being assigned with.
17. devices according to claim 15, wherein said clear channel assessment (CCA) always fromFirst sign-on of first subframe being assigned with.
18. devices according to claim 15, wherein said determining unit comprises:
Acquiring unit, is configured to obtain of described channel according to described clear channel assessment (CCA)One energy;
Compensation unit, be configured to according to described auxiliary detection reference signal estimate fromThe interference of described other transmitting apparatus;
Computing unit, is configured to based on described the first energy with from described other transmitting apparatusInterference, calculate the channel energy of described channel; And
Comparing unit, is configured to when described channel energy is during lower than predetermined threshold, described in determiningChannel is idle.
19. devices according to claim 15, wherein said auxiliary detection reference signal isComprise the receiving equipment specific reference signals sequence of one or more symbols, described receiving equipment spyDetermine reference signal sequence repeats in the Resource Block being assigned with.
20. devices according to claim 15, wherein for sending described auxiliary detection ginsengThe number of examining the symbol of signal is predefined, or by the letter from described receiving equipmentOrder configuration.
21. devices according to claim 14, wherein said transmission unit comprises:
Transmitting element, is configured to send auxiliary detection reference signal, so that described reception is establishedThe standby starting point of determining described transmitting apparatus execution transmission data.
22. devices according to claim 14, wherein said transmission unit comprises:
The first transmitting element, is configured in response to for sending auxiliary detection reference signalA symbol place in subframe determines that described channel is idle, utilize and then described symbol itAfter symbol send targeting signal, to indicate described channel occupied; And
The second transmitting element, be configured to utilize the symbol for sending described targeting signal itAfter one or more symbols, send auxiliary detection reference signal, so that described receiving equipmentDetermine described for send auxiliary detection reference signal subframe for transmitting the symbol of dataNumber.
23. devices according to claim 14, wherein said transmission unit comprises that coding is singleUnit, described coding unit is configured to carry out at least one with lower:
To be independent of the mode of the data in next subframe, to for sending auxiliary detection with reference to letterNumber subframe in the data for the symbol that transmits data encode;
With with next subframe in data same way, to for sending auxiliary detection reference signalSubframe in the data for the symbol that transmits data carry out combined coding; And
The subframe for sending auxiliary detection reference signal for transmitting the symbol of dataThe redundancy versions of the coded data in next subframe of middle transmission.
24. 1 kinds for realizing the device of intercepting before session, comprising:
Authorize transmitting element, be configured to send scheduling authorization message to transmitting apparatus; And
Determining unit, is configured in response to the auxiliary detection detecting from described transmitting apparatusReference signal, determines the transmission from the data of described transmitting apparatus.
25. devices according to claim 24, wherein said scheduling authorization message is indicated instituteState transmitting apparatus and carry out a subframe or the multiple continuous subframes that transfer of data is used.
26. devices according to claim 24, also comprise:
Signaling transmitting element, is configured to transmit signaling to described transmitting apparatus, with to for sending outSend the number of the symbol of described auxiliary detection reference signal to be configured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410625504.2A CN105611639B (en) | 2014-11-07 | 2014-11-07 | For realizing the method and apparatus listened to before session |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410625504.2A CN105611639B (en) | 2014-11-07 | 2014-11-07 | For realizing the method and apparatus listened to before session |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105611639A true CN105611639A (en) | 2016-05-25 |
| CN105611639B CN105611639B (en) | 2019-03-19 |
Family
ID=55991098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410625504.2A Active CN105611639B (en) | 2014-11-07 | 2014-11-07 | For realizing the method and apparatus listened to before session |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105611639B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106231614A (en) * | 2016-07-30 | 2016-12-14 | 深圳市金立通信设备有限公司 | A kind of method for transmitting signals and related network elements |
| CN107888360A (en) * | 2016-09-30 | 2018-04-06 | 华为技术有限公司 | Reference signal transmission method, equipment and system |
| WO2018214940A1 (en) * | 2017-05-24 | 2018-11-29 | 华为技术有限公司 | Channel interception method, network side device and terminal |
| WO2019085911A1 (en) * | 2017-10-30 | 2019-05-09 | Nokia Shanghai Bell Co., Ltd. | Window-based scheduling method, device and computer readable medium |
| WO2019213934A1 (en) * | 2018-05-11 | 2019-11-14 | 株式会社Ntt都科摩 | Method for signal transmission and corresponding user terminal, and base station |
| CN110463333A (en) * | 2017-03-29 | 2019-11-15 | 英特尔Ip公司 | For handling the mechanism for indicating that the uplink of the different physical uplink shared channel starting positions in same subframe is granted |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102648646A (en) * | 2009-12-02 | 2012-08-22 | 高通股份有限公司 | Apparatus and methods for spectrum sharing using listen-before-talk with quiet periods |
| CN103229582A (en) * | 2012-12-24 | 2013-07-31 | 华为技术有限公司 | Method for resource competition, and method and device for utilization of resource competition |
| CN103580840A (en) * | 2012-08-10 | 2014-02-12 | 捷讯研究有限公司 | TD LTE secondary component carrier in unlicensed bands |
| CN103765824A (en) * | 2011-07-14 | 2014-04-30 | 美国博通公司 | Methods and apparatuses for provision of a flexible time sharing scheme on an unlicensed band of a system |
-
2014
- 2014-11-07 CN CN201410625504.2A patent/CN105611639B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102648646A (en) * | 2009-12-02 | 2012-08-22 | 高通股份有限公司 | Apparatus and methods for spectrum sharing using listen-before-talk with quiet periods |
| CN103765824A (en) * | 2011-07-14 | 2014-04-30 | 美国博通公司 | Methods and apparatuses for provision of a flexible time sharing scheme on an unlicensed band of a system |
| CN103580840A (en) * | 2012-08-10 | 2014-02-12 | 捷讯研究有限公司 | TD LTE secondary component carrier in unlicensed bands |
| CN103229582A (en) * | 2012-12-24 | 2013-07-31 | 华为技术有限公司 | Method for resource competition, and method and device for utilization of resource competition |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106231614A (en) * | 2016-07-30 | 2016-12-14 | 深圳市金立通信设备有限公司 | A kind of method for transmitting signals and related network elements |
| CN107888360A (en) * | 2016-09-30 | 2018-04-06 | 华为技术有限公司 | Reference signal transmission method, equipment and system |
| CN110463333A (en) * | 2017-03-29 | 2019-11-15 | 英特尔Ip公司 | For handling the mechanism for indicating that the uplink of the different physical uplink shared channel starting positions in same subframe is granted |
| CN110463333B (en) * | 2017-03-29 | 2023-09-12 | 苹果公司 | Mechanism for processing uplink grants indicating different physical uplink shared channel start positions in the same subframe |
| WO2018214940A1 (en) * | 2017-05-24 | 2018-11-29 | 华为技术有限公司 | Channel interception method, network side device and terminal |
| CN108966355A (en) * | 2017-05-24 | 2018-12-07 | 华为技术有限公司 | Channel sense method, network side equipment and terminal |
| US11109411B2 (en) | 2017-05-24 | 2021-08-31 | Huawei Technologies Co., Ltd. | Channel sense method, network side device, and terminal |
| WO2019085911A1 (en) * | 2017-10-30 | 2019-05-09 | Nokia Shanghai Bell Co., Ltd. | Window-based scheduling method, device and computer readable medium |
| WO2019213934A1 (en) * | 2018-05-11 | 2019-11-14 | 株式会社Ntt都科摩 | Method for signal transmission and corresponding user terminal, and base station |
| CN111837351A (en) * | 2018-05-11 | 2020-10-27 | 株式会社Ntt都科摩 | Method for transmitting signals, corresponding user terminal and base station |
| US11469926B2 (en) | 2018-05-11 | 2022-10-11 | Ntt Docomo, Inc. | Method for transmitting signals and corresponding terminals, and base stations |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105611639B (en) | 2019-03-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102367084B1 (en) | Location determination method and device for user equipment and user equipment | |
| US20200328850A1 (en) | Method and terminal for data transmission | |
| CN105611639A (en) | Methods and device for realizing listen-before-talk | |
| CN110072290B (en) | Communication method and device of LAA system | |
| WO2017024998A1 (en) | Data transmission method and device | |
| KR101781013B1 (en) | Wireless communication method, apparatus, and system | |
| CN109391342B (en) | Data transmission method, related equipment and system | |
| EP3832931A1 (en) | Harq feedback method and device | |
| CN109392180B (en) | Random access method, network side equipment and mobile communication terminal | |
| CN105634703A (en) | Indication method, indication system, obtaining method, obtaining system and communication system | |
| CN109565846A (en) | For information transmission and the received method and apparatus of information | |
| CN104768160A (en) | Scheduling method and scheduling device for unlicensed spectrum | |
| WO2020037569A1 (en) | Base station configured hybrid random access procedure | |
| CN105636230A (en) | Method and device used for implementing interception before session | |
| US20210136804A1 (en) | Method and device for transmitting signal | |
| US20210243726A1 (en) | Communication apparatus | |
| US20140269528A1 (en) | Network supervised device-to-device communication | |
| CN110831140A (en) | Power determination method and device | |
| US20230209368A1 (en) | Wireless communication method using on-device learning-based machine learning network | |
| CN108289020B (en) | Method and device used in UE and base station for wireless communication | |
| AU2019451382B2 (en) | Report of HARQ feedback in sidelink transmission | |
| CN114599010A (en) | Positioning method and device on secondary link SL and terminal | |
| KR20210018023A (en) | Method and apparatus for transmitting aperiodic data in sidelink communication | |
| US20230102282A1 (en) | Methods and devices of resource mapping for data transmission and of data receiving | |
| CN105472623B (en) | A kind of authorization frequency spectrum in Cellular Networks assists access communications method and apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 201206 Jinqiao ningqiao Road, Pudong, Shanghai, Pudong New Area, Shanghai, China, No. 388 Applicant after: Shanghai NOKIA Baer Limited by Share Ltd Address before: 201206 Jinqiao ningqiao Road, Pudong, Shanghai, Pudong New Area, Shanghai, China, No. 388 Applicant before: Shanghai Alcatel-Lucent Co., Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |