CN107623919A

CN107623919A - Dynamic is sent using request and the mandate of clear to send message assists to access communication

Info

Publication number: CN107623919A
Application number: CN201710567872.XA
Authority: CN
Inventors: F·贝尔霍尔; L·斯梅尼; T·塔贝特; S·A·姆塔巴
Original assignee: Apple Computer Inc
Current assignee: Apple Inc
Priority date: 2016-07-13
Filing date: 2017-07-13
Publication date: 2018-01-23
Anticipated expiration: 2037-07-13
Also published as: DE102017211971A1; CN107623919B; DE102017211971B4

Abstract

Sent the present invention relates to dynamic using request and the mandate of clear to send message assists to access communication.This disclosure relates in a manner of considering concealed nodes that may be present cellular communication is performed in an unlicensed spectrum waiting for an opportunity to introduce using RTS and CTS message.Listem-before-talk process be can perform to determine whether wireless medium can use.When listem-before-talk process is completed, it may be determined that according to the time quantum of next possible time started regular synchronization scheme, until being communicated in a cellular communication system of cellular communication system；Wireless medium can be taken until the next possible time started to be communicated in a cellular communication system by being based at least partially in the way of the time quantum of the next possible time started to be communicated in a cellular communication system selects.Cellular communication can be performed on the radio medium in next possible time started for being communicated in a cellular communication system.

Description

Dynamic is sent using request and the mandate of clear to send message assists to access communication

Technical field

The application is related to radio communication, and is perform LAA communications more particularly to using dynamic RTS/CTS System, apparatus and method.

Background technology

The use of wireless communication system is just in rapid growth.In recent years, wireless device such as smart phone peace Plate computer has become the precision that becomes increasingly complex.In addition to supporting telephone calls, present many mobile device (that is, user equipmenies Device or UE) also provide to internet, Email, text message and using global positioning system (GPS) navigation access, And the application program of the complex precise using these functions can be operated.It additionally, there are many different wireless communication technologys And standard.It is (such as related to WCDMA or TD-SCDMA air interfaces that some examples of wireless communication standard include GSM, UMTS Connection), LTE, advanced LTE (LTE-A), HSPA, 3GPP2CDMA2000 (for example, 1xRTT, 1xEV-DO, HRPD, eHRPD), IEEE 802.11 (WLAN or Wi-Fi), IEEE 802.16 (WiMAX), BLUETOOTH^TMEtc..

The ever-increasing feature of quantity is introduced in a wireless communication device and function is also generated for improving radio communication And improve the constant demand of Wireless Telecom Equipment.Significantly ensure (such as to pass through by user equipment (UE) device Wireless device, the cell phone such as used in radio honeycomb communication, base station and relay station) signal that is transmitted and received Signal accuracy.In addition, the function of increase UE equipment may cause significant pressure to the battery life of UE equipment.Cause This, it is also quite significant that reduce the power demand in the design of UE equipment, while allow UE equipment keep good transmitting and Receiving ability is communicated with improving.

In addition to above-mentioned communication standard, the extension for being intended to improve the transmission coverage in some cellular networks also be present Standard.For example, LTE in unlicensed spectrum (LTE-U) allows cellular carriers by the way that (it is also by being permitted in the 5GHz frequency bands of unauthorized More Wi-Fi equipment uses) in transmitting improve the coverage in its cellular network.Authorize and assist access (LAA) to describe one Technology as species, it is intended to, and by using the contention protocols for being referred to as listem-before-talk (LBT), (agreement contributes to and other Wi-Fi equipment coexists in same frequency range) standardize the LTE operation in Wi-Fi frequency ranges.However, work as Wi-Fi signal and LAA/ In the presence of LTE-U signals are equal, coexisted in same frequency band honeycomb and Wi-Fi communication still can cause data throughout reduce and/ Or streaming application (data flow) performance reduces.

The content of the invention

There is provided herein when such as according to LTE-U or LAA, the execution cellular communication in unlicensed spectrum, processing may The embodiment of the devices, systems, and methods of existing concealed nodes.

When performing cellular communication in shared unlicensed spectrum, for reducing the possibility clashed on share medium The technology of property can improve the efficiency and validity to be communicated on share medium.For example, it is desirable to led on shared wireless medium The wireless device (equipment for e.g., including performing cellular communication) of letter can jointly perform listem-before-talk (LBT) process, to keep away Exempt to be transmitted when can detect another transmission on medium.Due to this process can take uncertain time quantum (for example, Depending on the duration of any transmission occurred when performing LBT processes), therefore equipment of the share medium to performing LBT processes The timing being made available by is probably uncertain and unpredictable.For the cellular communication system using regular synchronization scheme Speech, this may cause in the case where successfully completing LBT processes and cellular communication according to the regular synchronization scheme of cellular communication system It is spaced between one possible time started.

According to the techniques described herein, what is operated in such cellular communication system using unlicensed spectrum wirelessly sets It is standby, it can wait for an opportunity to realize further collision avoidance technique using this possible interval, such as exchange request and send (RTS)/clear to send (CTS) shake hands, and/or send CTS to the machine (CTS-to-self) message, and/or send Wi-Fi before Leading code or Wi-Fi NAV (for example, duration that instruction media retain), with the further possibility for reducing conflict.For example, by In successfully complete on LBT processes and wireless medium between next possible time started of cellular communication when being spaced in different Between may have different length, therefore wireless device can perform RTS/CTS shake hands, and/or wait for an opportunity (for example, according to Every length) send CTS-to-self or Wi-Fi lead codes/NAV message.As a kind of such possibility, if interval length Shaken hands to RTS/CTS is sufficient for, then wireless device can perform it is this shake hands, or if interval be not long enough to carry out RTS/ CTS shakes hands, but is long enough to transmit CTS-to-self message or Wi-Fi lead codes/NAV, then equipment can transmit such message, Or if interval falls short of for one of both technologies, then it can abandon any technology.Wireless device can transmit Preserved signal (for example, cell special reference (CRS), noise etc.), to maintain in interval except being shaken hands for RTS/CTS Or the partly control for wireless medium of any time beyond CTS-to-self or Wi-Fi lead codes/NAV message.

This of RTS/CTS, CTS-to-self or Wi-Fi lead code/NAV technologies waits for an opportunity application and can improved do not awarding The coexistence characteristics of the cellular communication system operated in power frequency spectrum.For example, LBT processes can help to reduce can detect each other two The possibility clashed between node, and according at least to some embodiments, addition RTS/CTS shakes hands and CTS-to-self Message can help to reduce concealed nodes so that conflicting than the possibility more to come into force during individualism LBT processes.And for example, if The wireless device of shared wireless medium can utilize RTS/CTS shake hands and/or CTS-to-self message provided in duration Information come determine within the duration of cellular communication enter low-power mode (for example, as its clear and definite channel assessment procedure A part), then according at least to some embodiments, this can improve the operating efficiency of this kind equipment.

It may be noted that technique described herein can be implemented in several different types of equipment and/or will be described herein Several different types of equipment of technology and this are used together, several different types of equipment include but is not limited to base station, Access point, cell phone, portable electronic device, tablet personal computer, wearable device and various other computing devices.

Present invention aims to provide the brief overview of some described in the document themes.On it will thus be appreciated that Feature described in text is merely illustrative and should not be construed as reducing the scope or essence of theme described herein in any way.Herein Other features, aspect and the advantage of the theme will become aobvious according to detailed description below, drawings and claims And it is clear to.

Brief description of the drawings

Fig. 1 shows exemplary (and simplification) wireless communication system according to some embodiments；

Fig. 2 shows the exemplary base to be communicated with exemplary wireless subscriber equipment (UE) device according to some embodiments Stand；

Fig. 3 shows the block diagram of the UE according to some embodiments；

Fig. 4 shows the block diagram of the base station according to some embodiments；

Fig. 5 shows the example wireless communications according to some embodiments；

Fig. 6 shows the example communication system according to some embodiments, and plurality of distinct device can use Wi- Fi is communicated with one another by special frequency band such as 2.4GHz and/or 5GHz frequency bands；

Fig. 7 shows the illustrative aspect to be communicated according to the LAA of some embodiments；

Fig. 8 is the flow chart for showing the possible exemplary L BT processes according to some embodiments；

Fig. 9 shows the example communication system with concealed nodes according to some embodiments；

Figure 10 is to show the illustrative methods that LAA communications are performed using dynamic RTS/CTS according to some embodiments Flow chart；

Figure 11-Figure 13 shows the various possible LAA call duration times lines according to some embodiments, and wireless device can root Operated according to these timelines.

Although feature as described herein is susceptible to various modifications and alternative forms, its specific embodiment is in accompanying drawing In show and be described in detail herein by way of example.It will be appreciated, however, that accompanying drawing and detailed description are not intended to this Invention is limited to particular forms disclosed, and antithesis, its object is to cover be defined by the appended claims All modifications form, equivalents and alternative form within the spirit and scope of this theme.

Embodiment

Acronym

Use various acronyms in the whole text in this application.The protrusion the most being likely to occur in the whole text in this application Acronym used is defined as follows：

·UE：User equipment

·RF：Radio frequency

·BS：Base station

·GSM：Global system for mobile communications

·UMTS：UMTS

·LTE：Long Term Evolution

·LTE-U：Unauthorized LTE

·LAA：Authorize and assist to access

·TDD：Time division duplex

·FDD：FDD

·TX：Transmission/transmission

·RX：Reception/receiving

·LAN：LAN

·WLAN：WLAN

·LBT：Listem-before-talk

·AP：Access point

·RAT：Radio access technologies

·IEEE：Institute of Electrical and Electronic Engineers

·Wi-Fi：WLAN (WLAN) RAT based on the standards of IEEE 802.11

Term

It is the nomenclature of the term occurred in the application below：

Storage medium-any one of various types of non-transient memory devices or storage device.Term " memory Medium " is intended to include install medium, such as CD-ROM, floppy disk or tape unit；Computer system memory or arbitrary access are deposited Reservoir, DRAM, DDR RAM, SRAM, EDO RAM, Rambus RAM etc.；Nonvolatile memory, such as flash memory, magnetic are situated between Matter, such as hard disk or optical storage apparatus；Register, or memory component of other similar types etc..Storage medium also may be used Including other kinds of non-transient memory or combinations thereof.In addition, storage medium can be located at the first meter of configuration processor In calculation machine system, or the different second computers that first computer system is connected to by network such as internet can be located at In system.In example below, second computer system can provide programmed instruction for performing to first computer system.Art Language " storage medium " may include to can reside in diverse location for example by two in the different computer systems of network connection Or more storage medium.Storage medium can store the programmed instruction that can be performed by one or more processors (for example, tool Body is computer program).

Mounting medium-storage medium as described above, and physical transmission medium such as bus, network and/or transmission Other physical transmission mediums of signal such as electric signal, electromagnetic signal or data signal.

Computer system (or computer)-any of various types of calculating or processing system, including individual calculus Machine system (PC), large computer system, work station, network appliance, Internet appliances, personal digital assistant (PDA), TV system The combination of system, raster symbol-base system or other equipment or each equipment.Generally, term " computer system " can be broadly defined To include any equipment (or combination of equipment) with least one processor for performing the instruction from storage medium.

User equipment (UE) (or " UE equipment ")-various types of calculating that are portable or portable and performing radio communication Any one computer system device in machine system equipment.The example of UE equipment include mobile phone or smart phone (such as iPhone^TM, based on Android^TMPhone), tablet personal computer is (for example, iPad^TM、Samsung Galaxy^TM), portable game Equipment is (for example, Nintendo DS^TM、PlayStation Portable^TM、Gameboy Advance^TM、iPhone^TM), can wear Wear equipment (for example, intelligent watch, intelligent glasses), laptop computer, PDA, portable Internet appliance, music player, number According to storage device or other handheld devices etc..Generally, term " UE " or " UE equipment " can broadly be defined as including and be easy to use Transport and any electronic equipment, computing device and/or telecommunication apparatus (or combination of equipment) of radio communication can be carried out in family.

Any one of various types of computer system devices of wireless device-execution radio communication equipment.Wirelessly Equipment can be portable (or mobile), or can be fixation or be fixed on some opening position.UE is wireless device One example.

Any one of the various types of computer systems or equipment of communication equipment-execution communication equipment, wherein logical Letter can be wire communication or radio communication.Communication equipment can be portable (or mobile), or can be it is fixed or It is fixed on some opening position.Wireless device is an example of communication equipment.UE is another example of communication equipment.

Base station (BS)-term " base station " has the four corner of its its ordinary meaning, and comprises at least and be installed in fixation Opening position and the wireless communications station for being communicated as a part for radio telephone system or radio system.

Treatment element-refer to performs the various of the function in equipment (such as user equipment (ue) device or cellular network device) Element or element combination.Treatment element can include, such as：Processor and associated memory, individual processors kernel Part or circuit, whole processor cores, processor array, circuit such as ASIC (application specific integrated circuit), programmable hardware element Part such as field programmable gate array (FPGA) and any of the above combination it is any.

Wi-Fi- terms " Wi-Fi " have a four corner of its its ordinary meaning, and including at least cordless communication network or RAT, it provides service by WLAN (WLAN) access point, and is provided by these access points to the connectivity of internet.Mostly The modern Wi-Fi network (or wlan network) of number is based on the standards of IEEE 802.11, and is appeared on the market with the name of " Wi-Fi ".Wi-Fi (WLAN) network is different from cellular network.

Automatically-refer to as computer system (for example, as software performed by computer system) or equipment (for example, circuit, Programmable hardware element, ASIC etc.) performed by action or operation, without user input directly specify or perform the action or Operation.Therefore, the operation that term " automatic " is manually performed or specified with user is contrasted, and wherein user provides input to directly Perform the operation.Automated procedure can be started by input that user is provided, and the action of subsequent " automatic " execution be not by What user specified, i.e. be not " manual " execution, wherein user specifies each action to perform.For example, by selecting each word Section simultaneously provides input specify information, and user fills in electrical form (for example, by keying in information, selection check box, carrying out radio Selection etc.) to fill up a form manually, even if computer system is responsive to user action to update the form.The form can lead to Computer system Auto-writing is crossed, wherein computer system (for example, the software performed on the computer systems) analyzes form Field simultaneously fills in the form, and the answer of specific field is inputted without any user.As it appears from the above, user can adopting form from It is dynamic to fill in, but be not involved in form actually fills out that (for example, user does not have the answer of manual specific field but they are by automatic complete Into).The various examples of the operation performed automatically present description provides the action taken in response to user.

Be configured as-various parts can be described as " being configured as " and perform one or more tasks.In such context In, " being configured as " is to typically represent the wide in range statement that " having " performs one or more tasks " structure " during operation. Therefore, even if part is currently without the task of execution, the part may be alternatively configured as performing the task (for example, one group of electric conductor It can be configured as module being electrically connected to another module, even if when the two modules are not connected).In some contexts In, " being configured as " can typically represent the structure that " having " performs one or more tasks " circuit " during operation Wide in range statement.In this way, when part current access failure, the part may be alternatively configured as execution task.Generally, formed with The circuit of structure may include hardware circuit corresponding to " being configured as ".

In order to facilitate description, various parts can be described as performing one or more tasks.Such description should be explained " it is configured as " into including phrase.The part that statement is configured as performing one or more tasks is clearly intended to the part not Quote the 6th section of 35U.S.C. § 112 explanation.

Fig. 1 and Fig. 2-example communication system

Fig. 1 shows exemplary (and simplification) nothing that can realize disclosure various aspects according to some embodiments Line communication system.It may be noted that Fig. 1 system is only an a kind of example of possible system, and as needed can be various Embodiment is realized in any of system system.

As illustrated, this example wireless communications include base station 102, the base station by transmission medium and one or Multiple (for example, any amount) user equipment 106A, 106B wait until that 106N is communicated.Herein can be by each user equipment Referred to as " user's set " (UE) or UE equipment.Therefore, user equipment 106 is referred to as UE or UE equipment.

Base station 102 can be base transceiver stations (BTS) or cell site, and may include to realize and UE 106A to 106N Radio communication hardware and/or software.If applying base station 102 in LTE context, it is referred to alternatively as “eNodeB”.Base station 102 can also be equipped to network 100 (for example, in various possibilities, the core of cellular service provider Heart net, communication network such as public switch telephone network (PSTN) and/or internet) communicated.Therefore, base station 102 can promote Communication between user equipment and/or between user equipment and network 100.The communication zone (or overlay area) of base station can be claimed For " cell ".It is same as used herein, for UE, sometimes in the up-link and the situation of downlink communication for considering UE Under, base station can be considered as representing network.Therefore, can also be interpreted with the UE of one or more of network base station communication with The UE of network service.

It is wireless that base station 102 and user equipment can be configured with any of various radio access technologies (RAT) Technology is electrically accessed to be communicated by transmission medium, the radio access technologies (RAT) be also referred to as wireless communication technology or Telecommunication standard, such as, GSM, UMTS (WCDMA), LTE, LTE upgrade version (LTE-A), NR, LAA/LTE-U, 3GPP2CDMA2000 (for example, 1xRTT, 1xEV-DO, HRPD, eHRPD), Wi-Fi, WiMAX etc..

Therefore the base station similar with other of base station 102 operated according to identical or different cellular standards can provide As one or more subzone networks, one or more of subzone networks can be via one or more cellular standards at certain On one geographic area continuous or approximate continuous Overlay Service is provided to UE 106 and similar equipment.

It may be noted that UE 106 can be communicated using multiple wireless communication standards.For example, UE 106 can be configured as making With 3GPP cellular standards (such as LTE) and/or (cellular communication of such as CDMA2000 series of 3GPP2 cellular standards Cellular standards in standard) any of cellular standards communicated.In some embodiments, UE 106 can To be configured as performing LAA/ in a manner of the possibility for considering concealed nodes according at least to various methods as described herein LTE-U communicates.UE 106 is also configured to or is alternatively configured with WLAN, BLUETOOTH^TM, it is one or more complete Ball navigational satellite system (GNSS, such as GPS or GLONASS), one and/or multiple mobile TV broadcast standards (for example, ATSC-M/H or DVB-H) etc. communicated.Other combinations (including more than two wireless communication standards) of wireless communication standard It is and possible.

Fig. 2 shows the illustrative user device 106 to be communicated with base station 102 according to some embodiments (for example, equipment One in 106A to 106N).UE 106 can be the equipment with wireless network connectivity, such as mobile phone, handheld device, Wearable device, computer or tablet personal computer, or essentially any type of wireless device.UE 106 may include to be configured as holding Row is stored in the processor of the programmed instruction in memory.UE 106 can perform sheet by performing such stored instruction Any one in method embodiment described in text.Alternatively or in addition, UE 106 may include that programmable hardware element is all Any one the method embodiment or method described herein for being such as configured as performing in method described herein embodiment are real Apply any portion of FPGA (field programmable gate array) of any one method embodiment of scheme.UE 106 can be configured as Communicated using any one in multiple wireless communication protocols.For example, UE 106 can be configured with CDMA 2000, LTE, Two or more in LTE-A, WLAN or GNSS communicate.Other combinations of wireless communication standard are also possible.

UE 106 may include to be used to according to one or more RAT standards be led to using one or more wireless communication protocols One or more antennas of letter.In some embodiments, UE 106 can share reception chain between multiple wireless communication standards And/or one or more of transmitting chain part；Shared radio unit may include individual antenna, or may include to be used to hold Multiple antennas (for example, being directed to MIMO) of row radio communication.Generally, radio unit may include BBP, simulation RF letters Number process circuit (e.g., including wave filter, frequency mixer, oscillator, amplifier etc.) or digital processing circuit are (for example, for counting Word modulate and other digital processings) any combinations.Similarly, radio unit can realize one using aforementioned hardware Or multiple reception chains and transmitting chain.

In some embodiments, UE 106 be directed to be configured to, with each wireless communication protocol that it is communicated and It may include independent transmitting chain and/or reception chain (e.g., including independent antenna and other radio units).As another kind Possibility, UE 106 may include the one or more radio units shared between multiple wireless communication protocols, and by list One or more radio units that individual wireless communication protocol uniquely uses.For example, UE 106 may include to be used for using LTE or The shared radio unit that any of CDMA2000 1xRTT (or LTE or GSM) are communicated, and for using Wi-Fi and BLUETOOTH^TMIn each independent radio unit to be communicated.Other configurations are also possible.

Fig. 3-exemplary UE block diagrams

Fig. 3 shows the block diagram of the exemplary UE 106 according to some embodiments.As illustrated, UE 106 may include piece Upper system (SOC) 300, the SOC may include part for numerous purposes.For example, as illustrated, SOC 300 may include to hold The one or more processors 302 and executable graphics process of row UE 106 programmed instruction simultaneously provide display signal to display The display circuit 304 of device 360.One or more processors 302 may also be coupled to MMU (MMU) 340 and/or its His circuit or equipment, the MMU can be configured as from one or more processors 302 receive address and by those Address conversion into the position in memory (such as memory 306, read-only storage (ROM) 350, NAND-flash memory 310), Other described circuits or equipment are such as display circuit 304, radio unit 330, connector I/F 320 and/or display 360.MMU 340 can be configured as performing memory protection and page table conversion or set.In some embodiments, MMU 340 A part for one or more processors 302 can be included as.

As illustrated, SOC 300 may be coupled to UE 106 various other circuits.For example, UE 106 may include it is various types of It is the memory (e.g., including nand flash memory 310) of type, connector interface 320 (for example, for being coupled to computer system), aobvious Show device 360 and radio communication circuit 330 (for example, being used for LTE, LTE-A, NR, CDMA2000, BLUETOOTH^TM、WiFi、GPS Deng).UE devices 106 may include at least one antenna (such as 335a), and may include multiple antennas (such as by antenna 335a Shown in 335b), for performing the radio communication with base station and/or other equipment.Antenna 335a and 335b are by way of example Show, and UE equipment 106 may include less or more antenna.Generally speaking, one or more antennas are referred to as antenna 335.For example, UE equipment 106 can perform radio communication by radio circuit 330 using antenna 335.As described above, one In a little embodiments, UE can be configured with multiple wireless communication standards to carry out radio communication.

As herein next it is described further, UE 106 (and/or base station 102) may include for realizing following methods Hardware component and software part：At least UE 106 is set to perform LAA/LTE- in a manner of considering concealed nodes that may be present U communicates.The one or more processors 302 of UE devices 106 can be configured as implementing a part or complete for method described herein Portion, such as referred to by performing the program being stored on storage medium (for example, non-transient computer readable memory medium) Order.In other embodiments, one or more processors 302 can be configured as programmable hardware element, and such as FPGA is (existing Field programmable gate array) or as ASIC (application specific integrated circuit).In addition, as shown in figure 3, processor 302 can be coupled to Miscellaneous part and/or can be interoperated with miscellaneous part, so as to according to various embodiments disclosed herein by UE 106 performs the LAA/LTE-U communications for considering concealed nodes that may be present.One or more processors 302 can also be real Existing various other applications and/or the end-user application run on UE 106.

In some embodiments, radio unit 330 may include to be exclusively used in logical to control for various corresponding RAT standards The independent control of letter.For example, as shown in figure 3, radio unit 330 may include Wi-Fi controller 350, Cell Controllers (example Such as LTE controllers) 352 and BLUETOOTH^TMController 354, and at least some embodiments, in these controllers One or more controllers or whole controllers can be implemented as corresponding integrated circuit (referred to as IC or chip), and these are integrated Circuit communicates with one another, and is communicated with SOC 300 (more specifically with one or more processors 302).For example, Wi-Fi is controlled Device 350 processed can be communicated by cell-ISM links or WCI interfaces with Cell Controllers 352, and/or BLUETOOTH^TMController 354 can be communicated by cell-ISM links etc. with Cell Controllers 352.Although in radio Three independent controllers are shown in part 330, but be can be achieved in UE equipment 106 with for the less of various different RAT Or more similar control device other embodiments.

Fig. 4-exemplary base block diagram

Fig. 4 shows the block diagram of the exemplary base 102 according to some embodiments.It may be noted that Fig. 4 base station is only can One example of the base station of energy.As illustrated, base station 102 may include one of the executable programmed instruction for base station 102 or Multiple processors 404.One or more processors 404 may be coupled to MMU (MMU) 440 or other circuits or Equipment, the MMU (MMU) can be configured as receive from the address of one or more processors 404 and by those Address conversion is the position in memory (for example, memory 460 and read-only storage (ROM) 450).

Base station 102 may include at least one network port 470.As described in above in fig. 1 and 2, the network port 470 It can be configured as being coupled to telephone network, and the multiple equipment of Internet access telephone network is provided, such as UE devices 106.Network Port 470 (or additional network ports) can also or can alternatively be configured as being coupled to cellular network, such as cellular service provides The core network of side.Core network can provide and mobile related service and/or other clothes to multiple equipment such as UE devices 106 Business.In some cases, the network port 470 can be coupled to telephone network via core network, and/or core network can provide electricity Telephone network (for example, in other UE devices that cellular service provider is serviced).

Base station 102 may include at least one antenna 434 and possible multiple antennas.One or more antennas 434 can quilt It is configured for use as wireless transceiver and can be further configured to UE equipment 106 be led to via radio unit 430 Letter.One or more antennas 434 are communicated via communication chain 432 with radio unit 430.Communication chain 432 can be connect Receive chain, chain or both.Radio unit 430 is designed to be communicated via various aerogram standards, and this is wireless Telecommunication standard includes but is not limited to LTE, LTE-A, NR, WCDMA, CDMA2000 etc..The processor 404 of base station 102 can be configured For implement method described herein part or all, such as by perform be stored in storage medium (for example, non-transient Computer readable memory medium) on programmed instruction, so as to by consider there may be concealed nodes in a manner of, using LAA/ LTE-U communications make base station 102 be communicated with UE equipment.Alternatively, processor 404 can be configured as programmable hardware element Part, such as FPGA (field programmable gate array), or as ASIC (application specific integrated circuit), or combinations thereof.In some RAT In the case of (such as Wi-Fi), base station 102 can be designed as access point (AP), and in this case, the network port 470 can It is implemented as providing the access to wide area network and/or one or more LANs, such as it may include at least one ethernet side Mouthful, and radio unit 430 can be designed as being communicated according to Wi-Fi standards.Base station 102 can be according to disclosed herein Various methods operate, so as in a manner of considering concealed nodes that may be present with being set using LAA/LTE-U movement It is standby to be communicated.

Fig. 5-example communication system

Fig. 5 shows the example wireless communications 500 of the achievable disclosure each side according to some embodiments. System 500 is the system for realizing LTE access networks and Wi-Fi Radio Access Networks.System 500 may include UE 106 and LTE nets Network 504 and Wi-Fi network 506.

LTE access networks 504 represent some embodiments of the first RAT accesses, and Wi-Fi access networks 506 represent Some embodiments of 2nd RAT accesses.LTE access networks 504 can enter with wider array of cellular network (for example, LTE network) Row interaction, and Wi-Fi access networks 506 can interact with internet 514.More particularly, LTE accesses network 504 It can be interacted with serving BS (BS) 508, the base station can then provide the access to wider array of cellular network 516.Wi-Fi Access network 506 can interact with access point (AP), and the access point can then provide the access to internet 514.Cause This, UE 106 can access internet 514 via AP 510, and access network 504 via LTE and access cellular network 516.In some embodiments, although being not shown, UE 106 can also access network 504 via LTE and access internet 514.More particularly, LTE accesses network 504 and can interacted with gateway, and the gateway then can be with packet Data network (PDN) gateway interacts.PDN Gateway can be interacted then with internet 514.Therefore, UE 106 can be through One or both of network 504 and Wi-Fi access networks 506 are accessed by LTE to access internet 514.

Fig. 6-the example communication system with multiple Wi-Fi equipments

Fig. 6 shows example communication system 650, and plurality of distinct device can be passed through specific using Wi-Fi RAT Frequency band such as 2.4GHz and/or 5GHz frequency bands communicate with one another.As shown in fig. 6, support 5GHz Wi-Fi (for example, IEEE Equipment 802.11ac/n) has become fairly common, and this equipment is under ad-hoc mode and/or foundation structure/station mode Work.The data communication of (such as on 5GHz frequency bands) may include voice, video, real-time and best effort stream on special frequency band Measure type.Shown equipment include camera (611), tablet personal computer (613), loudspeaker (615), portable computer (605,617), Access interface/router (603), game console (619), the mobile device and intelligent surveillance device of such as smart phone (607) (621) or with radio access interface (621, and carry medium processing device 623) monitor.As shown in fig. 6, these equipment In many equipment can be communicated with one another using the Wi-Fi communication technologys on 5GHz frequency bands (and/or for example via access point 603 communicate with internet 601).In some cases, the Wi-Fi communications carried out by equipment may be by equally in 5GHz frequency bands The influence of the LAA/LTE-U communications of upper generation.

Fig. 7-LAA architectural overviews

In LTE, carrier aggregation (CA) refers to that two or more component carriers (CC) are polymerize, broader to support Transmission bandwidth, such as up to 100MHz bandwidth.According to UE ability, the UE can be received simultaneously on one or more CC or Transmission.When being configured to CA, UE can keep being connected with a kind of RRC of network.The serving cell for managing UE RRC connections is claimed For main plot (PCell), and secondary cell (SCell) can form one group of serving cell together with PCell.In CA, Ke Yijing UE is dispatched by the PDCCH on multiple serving cells simultaneously.Cross-carrier scheduling using multi-carrier indicator field (CIF) allows to take The PDCCH for cell of being engaged in dispatches the resource on another serving cell.That is, the UE of downlink distribution is received on a CC Associated data can be received on another CC.

LAA is the subclass of LTE intralband carrier aggregations, and wherein one in subcarrier is in 5GHz unlicensed frequency band Work, can also occur according to another RAT (such as Wi-Fi) communication on the frequency band.Resource in LAA carrier waves can by with tradition Resource identical mode in CA is scheduled.That is, identical carrier wave schedule and/or cross-level can be used to adjust Degree arranges (such as using PDCCH or ePDCCH) to dispatch LAA carrier waves.According at least to some embodiments, LAA Scell can be with Operated in the frame structure 3 being made up of 20 time slots, and can be accessed after successful listem-before-talk (LBT) process. Fig. 7 shows the example of typical LAA controls and data dispatch, there is provided assuming that successfully completing LBT processes in previous subframe In the case of, the example of same carrier wave scheduling (710) is (for example, in which case it is possible to use SCell PDCCH resource is come There is provided SCell control information), and it is cross-carrier scheduling (720) example (for example, in which case it is possible to use PCell PDCCH resource provides SCell control information).It may be noted that according to some embodiments, if RRC subframes Starting position indicates " s07 ", and DCI is not received by time slot 1, then UE can read the PDCCH/ePDCCH of time slot 2 To check down link data availability.

Should be noted (for example, according to applicable Standard Edition and/or implement select), LAA can be used for downlink communication and/ Or uplink communication.For example, according to some embodiments, LAA versions 13 may include to carry out downlink transmission using SCell Standard criterion details, and LAA versions 14 may include to carry out the standard criterion that downlink and up-link transmit using SCell Details.

Fig. 8-LBT processes

Fig. 8 shows the exemplary process diagram of LBT processes.It may be noted that one possible LBT of procedural representation shown in Fig. 8 Process, and be also possible for any amount of modification of Fig. 8 processes or alternative form.Generally, can be led to using LBT processes In the following manner is crossed to help prevent to cause conflict on shared wireless medium：Wireless medium is monitored to determine whether any biography It is defeated to carry out, and if it is determined that have transmission in progress, then without transmission.

As illustrated, at 802, initially, base station (for example, being shown as eNB in fig. 8) can be determined using shared wireless Jie Matter (such as 5GHz unlicensed frequency bands) initiates downlink transmission.

At 804, eNB can monitor the availability of wireless medium, so as to continuously determine whether the channel is true in advance It is idle in the fixed period.Time span can depend on the communication type to be transmitted (for example, priority).For example, according to one A little embodiments, different time length can be used for some or all of voice, video, best effort and background communication. In exemplary scenario shown in Fig. 8, the foundation length that the period can include 16 microseconds adds variable-length, and the latter is 9 micro- Second is multiplied by the coefficient selected based on communication type.For example, according to some embodiments, communicated for best effort type, this when Between section can be 43 μ s (for example, 16+9 × 3).As needed, or it alternatively can also be used for predefining the period He is worth (and algorithm for determination value).

If wireless medium predefine in the period be not it is continuously available (if for example, wireless medium it is busy or It is changed into busy before the predetermined period is expired), then eNB can continue to monitor wireless medium, until wireless medium is predefining Continuous idle in period, now this method can advance to step 806.

At 806, eNB can generate random counter N, and it has the value specified in the range of competition window (CW), such as Between 0 and predetermined maximum value possible CW.

At 808, it may be determined that whether counter N is equal to 0.If it is, this method can advance to step 810, wherein ENB can be transmitted continuing with its transmission opportunity.If counter N is not equal to 0, this method can advance to step 812, Its Counter N can reduce 1.

At 814, it may be determined that whether wireless medium keeps idle condition in 1 Wi-Fi time slot (for example, 9 μ s).Such as Fruit is no, then this method can advance to step 816, wherein eNB can monitor again wireless medium availability (for example, with step Similar mode in rapid 804), to determine whether the channel is predefining the continuous free time in the period.ENB can be as needed The step is repeated, until channel is predefining the continuous free time in the period.

If the result of step 814 or step 816 is "Yes", this method may return to step 808, wherein can be true Whether counter N is equal to 0 at present.As it was previously stated, once counter N is equal to 0, then this method can advance to step 810, wherein ENB can be transmitted continuing with its transmission opportunity.Otherwise, according to shown process, when the wireless medium free time, this method Repeatable counter N countdown.

Fig. 9-the communication system with concealed nodes

Fig. 9 is shown in which the possible example wireless communications 900 that concealed nodes be present.It is as illustrated, some Individual UE equipment 106A, 106B, 106C, 106D, 106E can be with closer to each other.However, and not all UE equipment 106 all can be at that Within this communication range.For example, as illustrated, UE equipment 106A can have communication range 902, the communication range extends to UE 106B, UE 106C and UE 106E, but may not be transmitted to UE 106D and/or be received from UE 106D. Similarly, UE equipment 106B can have communication range 904, and the communication range extends to UE 106A, UE 106C and UE 106D, but may not be transmitted to UE 106E and/or be received from UE 106E.

In this case, for example, UE 106D for UE 106A are concealed nodes (vice versa) in the case of, such as Fruit such as UE 106A and UE 106D will transmit data to UE 106B, then may be clashed in wireless medium.This then may be used Cause to disturb at UE 106B so that possibly any transmission can not be successfully decoded in UE 106B, from during efficiency waste Between, electric power and wireless medium resource.

Such situation and its modification can be commonly referred to as the illustrations of " hidden node problem ".Work as wireless medium When being evenly utilized (for example, by equipment using same communication technology), and (the example when wireless medium is mixed and used Such as, by the equipment using a variety of different communication technologies), hidden node problem can occur.For example, in some embodiments, Wireless communication system 900 can represent following system：Wherein used wireless medium includes the unlicensed spectrum of mixing.At this In the case of kind, UE equipment 106A-E may include LAA/LTE equipment, Wi-Fi station point, AP and/or be set using other of shared frequency spectrum Standby any combinations.Therefore, in this case, may between LAA/LTE-U and Wi-Fi station point and AP any combinations There is hidden node problem.

Potentially reduce this conflict caused by undetected concealed nodes quantity and/or seriousness one Kind method may include to send (RTS) and clear to send (CTS) message using request.For example, if UE 106A will be to UE 106B Send RTS message, and UE 106B with may be carried out by the CTS message that UE 106D are detected response (and possibly can not examine Survey other potential nodes by the UE 106A RTS message transmitted), then UE 106D can enter in UE 106A to UE 106B Avoid being transmitted during row transmission, so as to prevent potential conflict and resulting interference.For example, making dynamically and with waiting for an opportunity Can be with communication system 900 1 with the LAA communication technologys (those such as further described herein in regard to Figure 10) of RTS/CTS message Rise and use, to reduce conflict and interference in unauthorized mixing frequency spectrum situation.

It may be noted that RTS and CTS message in addition to helping to prevent potential conflict and resulting interference, also has Help improve power managed and improve CCA (eCCA) process of clear channel assessment (CCA) (CCA)/enhancing.For example, according to some implementations Scheme, RTS frames may include five fields, including frame control, duration, receiver address, transmitter address and Frame Check Sequence. Similarly, according to some embodiments, CTS frames may include four fields, including frame control, duration, receiver address and frame Verification sequence.Duration and expected recipient's information can be used for allowing the receiver of non-desired received side in the communication to continue Its RF is entered lower power mode (for example, sleep) during time, and the duration of the idle pulley is included it CCA/eCCA processes.

Figure 10-employ dynamic RTS/CTS LAA communications

LAA is not directed to the intrinsic solution of concealed nodes now, more generally says, what it was provided is used to assist to share The Wi-Fi nodes of wireless medium are limited to reduce the function of power consumption.Therefore, RTS/CTS use is incorporated into the LAA communication technologys In can alleviate the potential problems as caused by concealed nodes, improve the power consumption characteristics of neighbouring Wi-Fi and LAA equipment, it is and more general Improve the Coexistence Situation between this kind equipment everywhere.Figure 10 is shown according to some embodiments of the invention for making wirelessly to set Standby (for example, cellular basestation or wireless user equipment (UE) device) is performed by waiting for an opportunity to introduce in a manner of RTS and CTS message The method flow diagram of LAA communications.

The each side of Figure 10 methods can be by cellular basestation (BS 102 for such as showing and describing in each accompanying drawing herein) Implement, or more generally say, any one of computer system or equipment shown in the figures above can be combined as needed and come Use.Although it is directed to use with the communication technology and/or feature associated with LAA and/or 3GPP specification documents it may be noted that employing Mode describe at least some key elements of Figure 10 methods, but this description is not intended to limit the disclosure, and according to need The each side of Figure 10 methods can be used in any suitable wireless communication system.In various embodiments, shown method Some in key element can be performed, can replaced by other method key element simultaneously by with shown order different, or can be saved Slightly.The method part outside plus can be also performed as needed.As illustrated, this method is operable as follows.

At 1002, listem-before-talk (LBT) process can be performed by wireless device, to determine whether wireless medium can use. According to some embodiments, wireless device can perform LBT processes to ensure that wireless medium can be used for LAA communications (or using not Another cellular telecommunication art for authorizing frequency spectrum to be communicated).For example, wireless device can provide SCell on the radio medium Base station, the wireless medium can be channel in 5GHz unlicensed frequency bands or any other institute shared with other wireless devices Wireless medium is needed, other described wireless devices independently communicate with the Virtual network operator of control base station.

LBT processes can as shown in Fig. 8 and description similar fashion operated, or as needed in another way Operation.LBT processes may include to monitor wireless medium in the following manner to determine whether that any transmission is being carried out：Such as By detect the signal intensity on wireless medium be higher than be considered as instruction be transmitted some threshold value, by detection with It is intended to refer in the presence of the associated cycle signal pattern of lead code/prefix signal of transmission, and/or by performing other biographies Defeated detection technique.LBT processes may also include to be carried out if it is determined that having transmitted, then without transmission, and can be used for Help to reduce the conflict frequency on wireless medium.According to some embodiments (for example, example process according to Fig. 8), LBT processes may require at least removing wireless medium in one section of shortest time length, can just think that the process is successful.

Once the success of LBT processes, wireless device can carry out radio communication using wireless medium.For such as Wi-Fi Some wireless communication technologys, data transfer can be immediately begun to when successfully completing LBT.However, for such as many honeycombs Other wireless communication technologys of the communication technology (e.g., including LTE-LAA), it can use and limit possible data communication window Regular synchronization scheme.For example, as it was previously stated, in some cases, LTE-LAA communications may include frame structure, wherein each frame bag Include 10 subframes, each subframe includes 2 time slots again, a total of 20 time slots in each radio frames.In this case, at least According to some embodiments, due to synchronism reason, LAA communications may only (or may be even only on subframe side in boundary of time slot Boundary) place starts.

Because LBT processes can start at any time, and there may be uncertain length (for example, due to the mistake Journey successfully completes the service condition that may depend on wireless medium, or missing of other wireless devices during LBT processes), institute With generally it may happen that successfully complete LBT processes with by wireless device carry out LAA communications it is next may when Between between exist interval.If due to not taken in the interim wireless medium, wireless medium can be by another nothing Line equipment uses, and the wireless device can take wireless medium in one way or another during the period, for example, being Effectively retain wireless medium, until it can be used for LAA communication.

At 1004, it may be determined that successfully complete next possible time started that LBT processes communicate with LAA (under for example, One subframe may be next time slot) between time quantum.In other words, wireless device can calculate the equipment can because into Work(complete LBT processes and control wireless medium time point and the equipment can utilize wireless medium progress LAA communications when Between put between be spaced how long.

At 1006, wireless device can determine successfully complete LBT processes and LAA communication it is next may start when Between between, the equipment will take wireless medium mode.Taking the mode of wireless medium may include to transmit " preserved signal ", the letter It number may include the signal of noise, cell special reference (CRS) and/or any other required type, detect the signal i.e. Represent to take wireless medium by other wireless devices in wireless device communication range.

According to some embodiments, it can be based at least partially on and successfully complete LBT processes and carry out on the radio medium LAA communication next possible time started between time quantum come determine take wireless medium mode.As a kind of possible Property, it can help to alleviate as caused by concealed nodes using the time between completing LBT and communicating with starting LAA by the mode of waiting for an opportunity Potential interference.For example, according to some embodiments, if the time completed LBT and started between LAA communications carries out RTS/ enough CTS shakes hands, then the time can be used for carry out RTS/CTS shake hands, or if the time transmit enough CTS-to-self message but It is not enough to progress RTS/CTS to shake hands, then the time is available for transmission CTS-to-self message.

According to some embodiments, whether the expection recipient that may also be based at least in part on LAA communications supports RTS/CTS (for example, CTS signalings can be carried out) is shaken hands to determine the mode of occupancy wireless medium.For example, in order to complete LBT and beginning Interim between LAA communications makes wireless device initiation RTS/CTS shake hands, it may be important that expected recipient can prop up RTS/CTS signalings are held, such as in order to utilize CTS message response RTS message.This signaling is supported to may include that it can be identified It is the expection recipient indicated in RTS message, and is responded immediately (that is, after being spaced between shorter frame) with CTS.It can make Front end is transmitted to transmit CTS (for example, after this, front end can switch back into reception pattern, to receive by LAA with LAA passages Physical downlink control channel (PDCCH) and/or physical down link sharing channel (PDSCH)).Alternatively (if for example, It is expected that recipient transmits front end without LAA, such as, if it is configured as being only used for LAA downlinks), it is expected that receiving Side can use Wi-Fi interface (or may be in a closely corresponding Wi-Fi channel) transmission CTS message in LAA channels. (for example, between Wi-Fi module and LAA modules) can be utilized, and coexistence interface is using LAA interfaces to RTS message in real time Afterwards, the Wi-Fi transmission of CTS message is triggered.Therefore, at least in some cases, wireless device can also determine LAA communications It is expected that whether recipient supports RTS/CTS to shake hands.

In this case, example as an alternative, if having sufficient time to transmit CTS-to-self message, very Shaken hands to also time enough for carrying out RTS/CTS, then can use the time completed between LBT and beginning LAA communications To transmit CTS-to-self message, if for example, the expection recipient of LAA communications is not configured as (or not knowing that it is configured For) responded (if desired) using CTS message as the part that RTS/CTS shakes hands.Alternatively or except using CTS-to- Outside self message, the time completed LBT and started between LAA communications can be used for only sending Wi-Fi lead codes, such as including referring to Show the transmitting continuous time and media access control (MAC) frame head is not needed potentially to decode (such as feelings of RTS/CTS message Under condition) PHY frame heads, or instruction transmission network allocation vector (NAV)/duration other signalings based on Wi-Fi.

According to some embodiments, if the time is neither sufficient for RTS/CTS and shaken hands, it is not enough to transmit CTS-to- again Self message or Wi-Fi lead codes/NAV, then complete LBT and start LAA communication between time can only by not include RTS or Shared by CTS message or Wi-Fi lead codes/NAV preserved signal.Alternatively, if completing the next of LBT and LAA communications It (or is probably the transmission of no time enough not have time enough to carry out RTS/CTS to shake hands between the individual possible time started CTS-to-self or Wi-Fi lead codes/NAV message), then wireless device can postpone LAA communication until LAA communication it is follow-up The possible time started, and the additional period of delay LAA communications can be used to shake hands performing RTS/CTS and (or provide CTS-to- Self or Wi-Fi lead codes/NAV message).

Complete LBT and starting the interim between LAA communications, performing RTS/CTS and shake hands, transmit CTS-to-self Message or Wi-Fi lead codes/NAV or the two overall relative frequency neither occurred can depend, at least partially, on performing RTS/ CTS shakes hands and transmitted the typical length needed for CTS-to-self or Wi-Fi lead codes/NAV message, and LAA communications Time span between chance.However, according at least to some embodiments, these variables can work together so that can be with Perform RTS/CTS in most (may be even most of) occasions and shake hands.For example, as a kind of possibility, consideration can be each Time slot starts the situation of LAA communications, and each time slot can occur once with every 500 μ s in this case, and wherein complete Lead code/RTS/SIFS/ lead codes/CTS, which is exchanged, can generally need about 100-150 μ s.Assuming that LBT processes can be by 0 to 500 Between any microsecond count up into, until next time slot has equal probability, then may have in this case at least 70% probability has sufficient time to execution RTS/CTS before next time slot starts and shaken hands.If can be in each subframe Start LAA communications, this for example can occur once per 1ms, then this possibility can rise at least 85%.As it will be realized, For RTS/CTS shake hands other intervals between the other times length of CTS-to-self message and LAA communication opportunities, And what is be associated will have sufficient time to perform after LBT processes are completed, before LAA communication opportunities next time start RTS/CTS shakes hands or CTS-to-self possibility, and possible.

At 1008, can by identified mode successfully complete LBT processes and LAA communication it is next may start when Between between take wireless medium.For example, according at least to some embodiments, if successfully completed under LBT processes and LAA communications Time quantum between one possible time started is asked to send (RTS) message and received after interframe space clear at least equal to transmission Except the time quantum for sending (CTS) message, then wireless device can transmit RTS message simultaneously (for example, from LAA in response to RTS message The expection recipient of communication) receive CTS message.In addition, next may open of LBT processes and LAA communications if successfully completed Time quantum between time beginning is more than transmission RTS message and the time quantum of CTS message is received after interframe space, then wireless device Preserved signal can also be transmitted, the remaining time before next possible time started of LAA communications is equal to transmission RTS and disappeared Cease and the time quantum of CTS message is received after interframe space.

The time quantum between next possible time started of LBT processes and LAA communications is less than transmission if successfully completed Request sends (RTS) message and the time quantum of clear to send (CTS) message is received after interframe space, but at least equal to transmission CTS-to-self message time quantum (or may at least equal to transmission Wi-Fi lead codes/NAV message time quantum), then without Line equipment can transmit CTS-to-self message (or Wi-Fi lead codes/NAV message).In addition, LBT processes if successfully completed Time quantum between next possible time started of LAA communications is less than transmission RTS message and CTS is received after interframe space The time quantum of message, but it is more than the time quantum of transmission CTS-to-self message (or possible Wi-Fi lead codes/NAV message), Then wireless device can also transmit preserved signal, remaining time before next possible time started of LAA communications etc. In the time quantum of transmission CTS-to-self message (or Wi-Fi lead codes/NAV message).

The time quantum between next possible time started of LBT processes and LAA communications is less than transmission if successfully completed The time quantum of CTS-to-self message (or possible Wi-Fi lead codes/NAV message), then wireless device can transmit reserved letter Number (for example, not performing RTS/CTS simultaneously shakes hands or transmits CTS-to-self or Wi-Fi lead codes/NAV message), until LAA Next possible time started of communication.

At 1010, LAA communications can be performed on the radio medium in the LAA next possible time starteds to communicate.This It may include (and PDCCH transmission signalings/control may be used to believe using PDSCH during one or more LAA subframes/time slots Cease, for example, if being dispatched using same carrier wave) transmit data to one or more receiver equipments.

Communicated because wireless device may utilize (for example, it may be possible to underusing) to successfully complete LBT processes with LAA Between interval exchange RTS/CTS message, concealed nodes can detect the CTS transmitted by the expection recipient of LAA communications Message, therefore concealed nodes (i.e. relative to wireless device) can reduce in the possibility of LAA communication periods trial execution transmission, i.e., Concealed nodes is detected RTS message or LAA communications, the possibility in itself can also reduce.Further, since RTS and CTS message Transmission may include Wi-Fi lead codes, so being communicated compared to LAA, for some nodes (for example, even if they possibly can not Signal intensity is based solely on to detect transmission, also transmission can be detected based on cyclic prefix) for, they can more can Detect.It is worth noting that, according at least to some embodiments, even if wireless device only transmits CTS- in the interim To-self message or Wi-Fi lead codes/NAV, this benefit is also applicable, therefore even if it may be not so good as complete RTS/CTS Shake hands so effectively, still can reduce the chance of conflict interference LAA communications.

Figure 11-Figure 13-LAA call duration time lines

Figure 11-Figure 13 shows various possible LAA call duration times lines, when wireless device can communicate according to these LAA Top-stitching is operated for example with reference to Figure 10 method.Figure 11 shows exemplary time line 1100, between wherein LAA LBT Interval is by wireless device (in institute's diagram be shown as eNB) by transmitting LAA preserved signals (for example, noise etc.) and without using RTS/ CTS shakes hands or CTS-to-self mode takes.If for example, held for CTS-to-self message or complete RTS/CTS For hand, complete there is no time enough between LAA LBT and the PDCCH for starting next LAA subframes, then can use The timeline.

Figure 12 shows exemplary time line 1200, and wherein wireless medium is accounted for by LAA preserved signals (for example, noise etc.) With the remaining time before next LAA subframes start is enough to transmit CTS-to-self just, wireless at the time Equipment (being expressed as eNB in institute's diagram) can transmit CTS-to-self.It is expected that recipient's (being expressed as UE in the example shown) can connect Receive CTS-to-self and prepare to receive.In the range of other wireless devices (another Wi-Fi station point is shown as in institute's diagram) CTS-to-self can be received, and can determine to interrupt its current LBT process (for example, if applicable) and lead in LAA Believe and sleep is kept in the duration of (for example, as shown in CTS-to-self).If for example, shaken hands for complete RTS/CTS For, complete there is no time enough between LAA LBT and the PDCCH for starting next LAA subframes, but for transmitting CTS- The time is enough for to-self, then can use the timeline.

Figure 13 shows exemplary time line 1300, and wherein wireless medium is accounted for by LAA preserved signals (for example, noise etc.) With, the remaining time before next LAA subframes start is sufficient for RTS/CTS and shaken hands just, such as including transmitting RTS Time of message (for example, by wireless device), short interFrameGap (SIFS) and the time of CTS message is transmitted (for example, by LAA The expection recipient of communication), now wireless device (being shown as eNB in institute's diagram) can transmit RTS message.It is expected that recipient (being expressed as UE in shown diagram) can receive RTS message, and can be responded after sifs with CTS message.Model Other wireless devices (another Wi-Fi station point is shown as in institute's diagram) in enclosing can also receive CTS (and/or RTS), and It can determine to interrupt its current LBT process (for example, if applicable) and communicate (for example, as shown in RTS and CTS) in LAA Duration in keep sleep.If for example, for complete RTS/CTS shakes hands, in the case where completing LAA LBT and starting There is time enough between the PDCCH of one LAA subframe, then can use the timeline.

Hereinafter provide other exemplary.

One group of embodiment may include a kind of device, and it includes：Treatment element, the treatment element are configured such that wirelessly Equipment：Listem-before-talk (LBT) process is performed to determine whether wireless medium can use, wherein wireless medium includes unlicensed spectrum； When LBT processes are completed, it is determined that according to cellular communication system it is regular synchronization scheme, until carrying out in a cellular communication system The time quantum of next possible time started of communication；By being based at least partially on until being communicated in a cellular communication system Next possible time started time quantum and the mode that selects takes wireless medium until entering in a cellular communication system Next possible time started of row communication；And next it may start for what is communicated in a cellular communication system Time performs cellular communication on the radio medium.

According to some embodiments, wireless medium is taken by one or more of the following, until in honeycomb The next possible time started to be communicated in communication system：Request transmission (RTS)/clear to send (CTS) handshake procedure, CTS-to-self message, Wi-Fi lead codes/NAV, or preserved signal.

According to some embodiments, if wherein until the time quantum of next possible time started to be communicated for LAA More than the estimation time quantum for completing RTS/CTS handshake procedures, then wireless medium is straight by least one RTS/CTS handshake procedures occupancy To the next possible time started to be communicated in a cellular communication system.

According to some embodiments, if until the next possible time started to be communicated in a cellular communication system Time quantum be more than the estimation time quantum of transmission CTS-to-self or Wi-Fi lead codes/NAV message and less than completing RTS/ The estimation time quantum of CTS handshake procedures, then wireless medium is at least by CTS-to-self or Wi-Fi lead codes/NAV message occupancy Until the next possible time started to be communicated in a cellular communication system.

According to some embodiments, if until the next possible time started to be communicated in a cellular communication system Time quantum be less than complete RTS/CTS handshake procedures estimation time quantum, or less than send CTS-to-self or Wi-Fi before Leading code/NAV estimation time quantum, then wireless medium taken by preserved signal and communicated down until in a cellular communication system One possible time started, and do not accounted for by RTS/CTS handshake procedures or CTS-to-self or Wi-Fi lead codes/NAV message With.

According to some embodiments, wireless medium it is occupied until communicated in a cellular communication system it is next can Can the mode of time started be also based at least partially on the expection recipient of cellular communication and whether support request to send (RTS)/clear Selected except (CTS) handshake procedure is sent.

According to some embodiments, the next possible time started to be communicated in a cellular communication system includes basis Next subframe of the regular synchronization scheme of cellular communication system.

According to some embodiments, the next possible time started to be communicated in a cellular communication system includes basis Next time slot of the regular synchronization scheme of cellular communication system.

Another group of embodiment may include a kind of method, and this method includes：Pass through wireless device：Perform listem-before-talk (LBT) process is to determine whether wireless medium can use；It is determined that successfully complete LBT processes assists what access (LAA) communicated with authorizing Time quantum between next possible time started；It is based at least partially on and successfully completes LBT processes and on the radio medium LAA Time quantum between next possible time started of communication determines to successfully complete LBT processes and on the radio medium LAA The mode of wireless medium is taken between next possible time started of communication；LBT mistakes are being successfully completed in a manner of identified Wireless medium is taken between next possible time started of journey and LAA communications；And next may start in LAA communications Time performs LAA communications on the radio medium.

According to some embodiments, if successfully completed between next possible time started of LBT processes and LAA communications Time quantum at least equal to transmission ask send (RTS) message and after interframe space receive clear to send (CTS) message when The area of a room, it is determined that mode include：Transmit RTS message；And receive CTS message.

According to some embodiments, if successfully completed between next possible time started of LBT processes and LAA communications Time quantum be more than transmission RTS message and after interframe space receive CTS message time quantum, it is determined that mode also include： Transmit preserved signal, until LAA communication next possible time started before remaining time be equal to transmission RTS message and The time quantum of CTS message is received after interframe space.

According to some embodiments, if successfully completed between next possible time started of LBT processes and LAA communications Time quantum be less than transmission request send (RTS) message and after interframe space receive clear to send (CTS) message time quantum, But at least equal to transmission CTS-to-self or Wi-Fi lead codes/NAV message time quantum, it is determined that mode include：Transmission CTS-to-self or Wi-Fi lead codes/NAV message.

According to some embodiments, if successfully completed between next possible time started of LBT processes and LAA communications Time quantum be less than transmission RTS message and after interframe space receive CTS message time quantum, but more than transmission CTS-to- The time quantum of self or Wi-Fi lead codes/NAV message, it is determined that mode also include：Preserved signal is transmitted, until LAA communicates Next possible time started before remaining time amount be equal to transmission CTS-to-self or Wi-Fi lead codes/NAV message Time quantum.

According to some embodiments, if successfully completed between next possible time started of LBT processes and LAA communications Time quantum be less than the time quantum of transmission CTS-to-self or Wi-Fi lead codes/NAV message, it is determined that mode include：Pass Next possible time started that defeated preserved signal communicates until LAA.

According to some embodiments, next possible time started of LAA communications includes one of the following or more Person：According to next subframe of LAA regular synchronization schemes, or next time slot according to LAA regular synchronization schemes.

Another group of embodiment may include a kind of wireless device, and it includes：Antenna；It is operatively coupled to the wireless of antenna Electric part；And treatment element, treatment element are operatively coupled to radio unit；Wherein antenna, radio unit and processing Element is configured as：Listem-before-talk (LBT) process is performed to determine whether wireless medium can use；It is determined that successfully complete LBT processes With authorizing the time quantum between the next subframe time started for assisting access (LAA) to communicate；And it is based at least partially on into Work(completes LBT processes and the time quantum between next subframe time started predefines the situation of threshold value higher than first, in LAA Before next subframe time started of communication, transmission request sends (RTS) message, wherein LBT processes are with if successfully completed Time quantum between one subframe time started predefines threshold value less than first, then does not transmit RTS message.

According to some embodiments, antenna, radio unit and treatment element are further configured to：Determine that LAA communicates Expection recipient whether support the signaling of clear to send (CTS) message；And also it is based at least partially on the expection of LAA communications Recipient supports the signaling of CTS message to transmit RTS message before next subframe time started of LAA communications, wherein such as The expection recipient of fruit LAA communications does not support the signaling of CTS message, then does not transmit RTS message.

According to some embodiments, antenna, radio unit and treatment element are further configured to：In response in success LBT processes and the RTS message between next subframe time started are completed, receives the clear of the expection recipient from LAA communications Except transmission message.

According to some embodiments, antenna, radio unit and treatment element are further configured to：At least part ground Threshold value and it is higher than in successfully completing the time quantum between LBT processes and next subframe time started and being predefined less than first Second, which predefines threshold value, came before next subframe time started of LAA communications, transmission clear to send (CTS) to the machine (CTS-to-self) or Wi-Fi lead codes/NAV message, wherein when LBT processes and next subframe start if successfully completed Between between time quantum less than second predefine threshold value, then do not transmit CTS-to-self or Wi-Fi lead codes/NAV message.

According to some embodiments, wireless device includes cellular basestation.

Another group of exemplary may include non-transient computer accessible storage device medium, and it includes program and referred to Order, when these programmed instruction are performing in equipment so that the equipment realize any of any example in any aforementioned exemplary or All parts.

Another group of exemplary may include computer program, and it includes being used to perform any example in aforementioned exemplary Any or all part instruction.

Another group of exemplary may include a kind of equipment, and it includes being used to perform any example in aforementioned exemplary The device of any or all key element.

Embodiment of the present invention can be realized by any of various forms form.For example, in some embodiment party In case, the present invention can be embodied as to computer implemented method, computer readable memory medium or computer system.At other In embodiment, the hardware unit such as ASIC of one or more custom designs can be used to realize the present invention.In other implementations In scheme, one or more programmable hardware elements such as FPGA can be used to realize the present invention.

In some embodiments, non-transient computer readable memory medium (for example, non-transient memory component) can The instruction of its storage program and/or data are configured such that, if wherein perform the programmed instruction by computer system, are caused Computer system performs a kind of method, such as any of method described herein embodiment method embodiment, or this Any subset or such in any combinations of method embodiment described in text, or any method embodiment as described herein Any combinations of subset.

In some embodiments, equipment (such as UE) can be configured as including processor (or one group of processor) and storage Device medium (or memory component), wherein storage medium storage program are instructed, and wherein the processor is configured as from the storage Read in device medium and perform the programmed instruction, wherein the programmed instruction is executable to realize various methods as described herein Any of embodiment method embodiment (or any combinations of methods described herein embodiment, or it is as described herein Any combinations of any subset or such subset in any method embodiment).Can any of in a variety of manners form To realize the equipment.

Although the embodiment above has had been described in considerable detail, disclosed above, many changes are once understanding of completely Type and modification will become obvious for a person skilled in the art.It is contemplated that claims below is solved It is interpreted as covering all such variants and modifications.

Claims

1. a kind of device, including：

Treatment element, the treatment element are configured such that wireless device：

Listem-before-talk (LBT) process is performed to determine whether wireless medium can use, wherein the wireless medium includes unauthorized frequency Spectrum；

When the LBT processes are completed, it is determined that according to cellular communication system it is regular synchronization scheme, lead to until in the honeycomb The time quantum of the next possible time started to be communicated in letter system；

By the next possible time started being based at least partially on until being communicated in the cellular communication system The time quantum and the mode that selects takes the wireless medium until being communicated in the cellular communication system Next possible time started；And

In wireless Jie at next possible time started for being communicated in the cellular communication system Cellular communication is performed in matter.

2. device according to claim 1,

Wherein described wireless medium is taken by one or more of the following, until being carried out in the cellular communication system Next possible time started of communication：

Request sends (RTS)/clear to send (CTS) handshake procedure；

CTS-to-self message；

Wi-Fi lead codes/NAV；Or

Preserved signal.

3. device according to claim 2,

Wherein if held until the time quantum of the next possible time started to be communicated for LAA is more than completion RTS/CTS The estimation time quantum of hand process, then the wireless medium at least by the RTS/CTS handshake procedures take until in the honeycomb The next possible time started to be communicated in communication system.

4. device according to claim 2,

Wherein if until the time quantum of next possible time started to be communicated in the cellular communication system Shaken hands more than the estimation time quantum for transmitting CTS-to-self or Wi-Fi lead codes/NAV message and less than RTS/CTS is completed The estimation time quantum of journey, then the wireless medium at least accounted for by the CTS-to-self or described Wi-Fi lead codes/NAV message With until the next possible time started to be communicated in the cellular communication system.

5. device according to claim 2,

Wherein if until the time quantum of next possible time started to be communicated in the cellular communication system Less than the estimation time quantum for completing RTS/CTS handshake procedures, or less than transmission CTS-to-self or Wi-Fi lead codes/NAV Estimation time quantum, then the wireless medium by preserved signal take until the institute to be communicated in the cellular communication system Next possible time started is stated, and not by the RTS/CTS handshake procedures or the CTS-to-self or described Wi-Fi Lead code/NAV message takes.

6. device according to claim 1,

Wherein described wireless medium is occupied until what is communicated in the cellular communication system described next may open Whether the mode of time of beginning also is based at least partially on the expection recipient of the cellular communication and supports request to send (RTS)/clear Selected except (CTS) handshake procedure is sent.

7. device according to claim 1,

The next possible time started wherein to be communicated in the cellular communication system is included according to the honeycomb Next subframe of the regular synchronization scheme of communication system.

8. device according to claim 1,

The next possible time started wherein to be communicated in the cellular communication system is included according to the honeycomb Next time slot of the regular synchronization scheme of communication system.

9. a kind of method, including：

Pass through wireless device：

Listem-before-talk (LBT) process is performed to determine whether wireless medium can use；

It is determined that between successfully completing next possible time started that the LBT processes assist access (LAA) to communicate with mandate Time quantum；

Be based at least partially on successfully complete the LBT processes and on the wireless medium carry out LAA communications it is described next Time quantum between the individual possible time started determines successfully completing the LBT processes and carrying out on the wireless medium The mode of the wireless medium is taken between next possible time started of LAA communications；

Successfully completing the LBT processes in a manner of identified and carrying out next possible time started of LAA communications Between take the wireless medium；And

LAA communications are performed on the wireless medium at next possible time started of LAA communications.

10. according to the method for claim 9,

Wherein if successfully completed the LBT processes and carry out LAA communications next possible time started between when The area of a room asks transmission (RTS) message at least equal to transmission and the time quantum of clear to send (CTS) message is received after interframe space, Then identified mode includes：

Transmit RTS message；And

Receive CTS message.

11. according to the method for claim 10,

Wherein if successfully completed the LBT processes and carry out LAA communications next possible time started between when The area of a room is more than transmission RTS message and the time quantum of CTS message is received after interframe space, then identified mode also includes：

Preserved signal is transmitted, the remaining time amount before carrying out next possible time started of LAA communications is equal to Transmit RTS message and the time quantum of CTS message is received after interframe space.

12. according to the method for claim 9,

Wherein if successfully completed the LBT processes and carry out LAA communications next possible time started between when The area of a room is less than the time quantum that transmission request sends (RTS) message and clear to send (CTS) message is received after interframe space, but extremely Few to be equal to the time quantum for transmitting CTS-to-self or Wi-Fi lead codes/NAV message, then identified mode includes：

Transmit CTS-to-self or Wi-Fi lead codes/NAV message.

13. according to the method for claim 12,

Wherein if successfully completed the LBT processes and carry out LAA communications next possible time started between when The area of a room be less than transmission RTS message and after interframe space receive CTS message time quantum, but more than transmission CTS-to-self or The time quantum of Wi-Fi lead codes/NAV message, then identified mode also include：

Preserved signal is transmitted, the remaining time amount before carrying out next possible time started of LAA communications is equal to Transmit the time quantum of CTS-to-self or Wi-Fi lead codes/NAV message.

14. according to the method for claim 9,

Wherein if successfully completed the LBT processes and carry out LAA communications next possible time started between when The area of a room is less than the time quantum of transmission CTS-to-self or Wi-Fi lead codes/NAV message, then identified mode includes：

Transmit the next possible time started of the preserved signal until carrying out LAA communications.

15. according to the method for claim 9,

Wherein carrying out next possible time started of LAA communications includes one or more of the following：

According to next subframe of LAA regular synchronization schemes, or

According to next time slot of the LAA regular synchronization schemes.

16. a kind of wireless device, including：

Antenna；

Radio unit, the radio unit are operatively coupled to the antenna；With

Treatment element, the treatment element are operatively coupled to the radio unit；

Wherein described antenna, radio unit and treatment element are configured as：

It is determined that between successfully completing next subframe time started that the LBT processes assist access (LAA) to communicate with mandate Time quantum；And

The time quantum successfully completed between the LBT processes and next subframe time started is based at least partially on to be higher than First predefines threshold value, transmission request transmission (RTS) message before next subframe time started of LAA communications,

Wherein if successfully completed the time quantum between the LBT processes and next subframe time started less than described the One predefines threshold value, then does not transmit RTS message.

17. wireless device according to claim 16,

Wherein described antenna, radio unit and treatment element are further configured to：

Determine whether the expection recipient of the LAA communications supports the signaling of clear to send (CTS) message；And

The expected recipient for being at least also based in part on the LAA communications supports the signaling of CTS message, in LAA communications The RTS message is transmitted before next subframe time started,

Wherein if the expected recipient of LAA communications does not support the signaling of CTS message, then RTS message is not transmitted.

18. wireless device according to claim 16,

In response to the RTS between next subframe time started of the LBT processes and LAA communications is successfully completed Message, receive the clear to send message of the expection recipient from LAA communications.

19. wireless device according to claim 16,

The time quantum successfully completed between the LBT processes and next subframe time started is based at least partially on to be less than Described first predefines threshold value and threshold value is predefined higher than second, in next subframe time started of LAA communications Clear to send (CTS) is transmitted before to the machine (CTS-to-self) or Wi-Fi lead codes/NAV message,

Wherein if successfully completed the time quantum between the LBT processes and next subframe time started less than described the Two predefine threshold value, then do not transmit CTS-to-self or Wi-Fi lead codes/NAV message.

20. wireless device according to claim 16,

Wherein described wireless device includes cellular basestation.