CN109246709A

CN109246709A - Establish method and the base station of radio bearer

Info

Publication number: CN109246709A
Application number: CN201710362985.6A
Authority: CN
Inventors: 王建中
Original assignee: Shenzhen Jinli Communication Equipment Co Ltd
Current assignee: Shenzhen Jinli Communication Equipment Co Ltd
Priority date: 2017-05-22
Filing date: 2017-05-22
Publication date: 2019-01-18

Abstract

The embodiment of the invention discloses a kind of method for establishing radio bearer, the method is applied to the scene that LTE-U system shares unauthorized frequency range, which comprises base station determination can seize unauthorized frequency range, and base station belongs to LTE-U system；Base station broadcast base station Clear to Send frame is to seize unauthorized frequency range, base station Clear to Send frame is identical as the structure of the Clear to Send frame in wlan system, base station Clear to Send frame includes first part's information and second part information, first part's information is that base station is avoided to clash necessary information with other nodes when seizing unauthorized frequency range, and second part information is that terminal device establishes information necessary to radio bearer in base station and LTE-U system；In the case where the successful situation of unauthorized frequency range is seized in base station, base station is based on second part information and quickly establishes radio bearer.The present invention can be reduced to be established the time required for radio bearer between base station and terminal device, is realized and is quickly established radio bearer.

Description

Establish method and the base station of radio bearer

Technical field

The present invention relates to fields of communication technology, more particularly to establish method and the base station of radio bearer.

Background technique

LTE-U is to increase available network flow to cellular mobile data com using unlicensed spectrum, in unauthorized frequency The technical solution of LTE is disposed in section.In LTE-U system, by base station set to the terminal device in base station coverage area It is scheduled, so, the base station that terminal device is required and is resident in booting perhaps cell reselection is established or is re-established Radio bearer (Radio Bearer, RB), in order to be communicated between base station and terminal device by radio bearer.Existing Radio bearer is established under technical conditions, between base station and terminal device to need to pass through following steps:

(1), terminal device is synchronous with base station progress signal.In this step, base station is by Physical Cell Identifier (Physical Cell Identify, PCI) and antenna end slogan (port number) etc. be sent to terminal device.Correspondingly, terminal is set It is standby to receive Physical Cell Identifier and the antenna end slogan etc. that base station is sent.Terminal device can by parsing Physical Cell Identifier To obtain system bandwidth, System Frame Number and Physical HARQ Indicator Channel (PHICH, Physical HARQ Indicator The configuration informations such as Channel).It is appreciated that in this step, base station can also by system type (when classifying type/frequency division class Type, TDD/FDD), cyclic prefix (CP, Cyclic Prefix) type (conventional CP/ extend CP) etc. be sent to terminal device.

(2), terminal device reads the broadcast message of base station.In this step, base station is by cell special reference power The configuration of (CRS Tx Power) (Cell-specific Reference Signal, CRS) and Physical Random Access Channel (PRACH Configuration) (Physical Random Access Channel, PRACH) etc. is sent to terminal and sets It is standby.Correspondingly, terminal device receives CRS power and the PRACH configuration etc. that base station is sent.It is appreciated that in this step, Base station can also select cell and the information such as resident, access are sent to terminal device.

(3), random access procedure is completed between terminal device and base station.In this step, terminal device is small according to physics The random access procedure between base station is completed in area's mark, antenna end slogan, CRS power and PRACH configuration.Work as random access After process is completed, terminal device is converted to connection status (RRC-CONNECTED) from idle state (RRC-IDLE).

(4), radio bearer is established between terminal device and base station.After establishing radio bearer, base station and terminal device Between can be carried out data transmission by radio bearer.

As can be seen that establishing radio bearer between base station and terminal device needs the long period, it is not able to satisfy technology development Needs.

Summary of the invention

The embodiment of the present invention provides a kind of method for establishing radio bearer and base station methods, can reduce base station and set with terminal It is established the time required for radio bearer between standby, realizes and quickly establish radio bearer.

In a first aspect, providing a kind of method for establishing radio bearer, the method is applied to LTE-U system and shares non-award Weigh the scene of frequency range, which comprises

Base station determination can seize unauthorized frequency range, wherein the base station belongs to the LTE-U system；

Base station broadcast base station Clear to Send frame is to seize the unauthorized frequency range, wherein the base station clear to send Frame includes first part's information and second part information, first part's information for avoid the base station seize it is described It is clashed when unauthorized frequency range with other nodes in the unauthorized frequency range, the second part information is used for the base station Radio bearer is established with terminal device in the LTE-U system；

The random access procedure that terminal device described in the base station in response is initiated based on the second part information, to establish Radio bearer.

With reference to first aspect, in the first possible embodiment of first aspect,

First part's information includes the duration, wherein the duration is used to indicate the base station and occupies institute State the duration of unauthorized frequency range；

The second part information include CRS transmission power, antenna end slogan, Physical Cell Identifier, PRACH configuration and Timing Advance, wherein the Timing Advance is used to indicate the base station and starts to count with terminal device in the LTE-U system According to the time point of transmission.

The possible embodiment of with reference to first aspect the first, in the possible embodiment of second of first aspect, The base station Clear to Send frame includes frame control field, Duration field, destination address field and examines field, wherein

The frame control field is for carrying the CRS transmission power and the antenna end slogan；

The Duration field is for carrying the duration；

The destination address field is for carrying the Physical Cell Identifier, PRACH configuration and Timing Advance；

The FCS field is for carrying check code, wherein the check code is used for the frame control field, described holds Continuous time field and the destination address field are verified.

Any of the above-described kind of possible embodiment with reference to first aspect, the third possible embodiment of first aspect In, the base station Clear to Send frame is identical as the structure of the Clear to Send frame in wlan system.

Any of the above-described kind of possible embodiment with reference to first aspect, the 4th kind of possible embodiment of first aspect In, base station determination can seize unauthorized frequency range specifically:

The unauthorized frequency range is listened to by listening to technology in the base station, to obtain intercepted result；

In the case where the intercepted result meets preemptive condition, determination can seize unauthorized frequency range for the base station.

The 4th kind of possible embodiment with reference to first aspect, in the 5th kind of possible embodiment of first aspect, The technology of listening to is to avoid conflict carrier sense multiple access technology.

Second aspect, proposes a kind of method for establishing radio bearer, and the method is applied to LTE-U system and shares non-award Weigh the scene of frequency range, which comprises

The base station Clear to Send frame of terminal device reception base station broadcast, wherein the base station Clear to Send frame carries first Partial information and second part information, first part's information is for avoiding the base station from seizing the unauthorized frequency range When clashed with other nodes in the unauthorized frequency range, the second part information is for the base station and the LTE- Terminal device establishes radio bearer in U system；

The terminal device is based on the second information initiating random access procedure, is wirelessly held with establishing with the base station It carries.

In conjunction with second aspect, in the possible embodiment of the first of second aspect,

In conjunction with the first possible embodiment of second aspect, in the possible embodiment of second of second aspect, The base station Clear to Send frame includes frame control field, Duration field, destination address field and examines field, wherein

The Duration field is for carrying the duration；

In conjunction with any of the above-described kind of possible embodiment of second aspect, the third possible embodiment of second aspect In, the base station Clear to Send frame is identical as the structure of the Clear to Send frame in wlan system.

The third aspect provides a kind of base station, and the base station is the base station in LTE-U system, and the base station includes:

Determination unit can seize unauthorized frequency range for determination；

Radio unit seizes the unauthorized frequency range for broadcast base station Clear to Send frame, wherein removes the base station Sending frame includes first part's information and second part information, and first part's information is for avoiding the base station from seizing It is clashed when the unauthorized frequency range with other nodes in the unauthorized frequency range, the second part information is for described Terminal device establishes radio bearer in base station and the LTE-U system；

Unit is established, in the case where the successful situation of unauthorized frequency range is seized in the base station, the base station in response institute The random access procedure that terminal device is initiated based on the second part information is stated, to establish radio bearer.

In conjunction with the third aspect, in the possible embodiment of the first of the third aspect,

In conjunction with the first possible embodiment of the third aspect, in the possible embodiment of second of the third aspect, The base station Clear to Send frame includes frame control field, Duration field, destination address field and examines field, wherein

The Duration field is for carrying the duration；

In conjunction with any of the above-described kind of possible embodiment of the third aspect, the third possible embodiment of the third aspect In, the base station Clear to Send frame is identical as the structure of the Clear to Send frame in wlan system.

In conjunction with any of the above-described kind of possible embodiment of the third aspect, the 4th kind of possible embodiment of the third aspect In, the determination unit is for listening to the unauthorized frequency range to by listening to technology, to obtain intercepted result；Institute It states intercepted result to meet under preemptive condition, determination can seize unauthorized frequency range.

In conjunction with the 4th kind of possible embodiment of the third aspect, in the 5th kind of possible embodiment of the third aspect, The technology of listening to is to avoid conflict carrier sense multiple access technology.

Fourth aspect, proposes a kind of terminal device, and the terminal device belongs to LTE-U system, the terminal device packet It includes: receiving unit and establishing unit

The receiving unit is used to receive the base station Clear to Send frame of base station broadcast, wherein the base station Clear to Send frame Carry first part's information and second part information, first part's information for avoid the base station seize it is described non- Clashed when authorized spectrum band with other nodes in the unauthorized frequency range, the second part information for the base station with Terminal device establishes radio bearer in the LTE-U system；

The unit of establishing is for based on the second information initiating random access procedure, to establish wirelessly with the base station Carrying.

In conjunction with fourth aspect, in the possible embodiment of the first of fourth aspect,

In conjunction with the first possible embodiment of fourth aspect, in the possible embodiment of second of fourth aspect, The base station Clear to Send frame includes frame control field, Duration field, destination address field and examines field, wherein

The Duration field is for carrying the duration；

In conjunction with any of the above-described kind of possible embodiment of fourth aspect, the third possible embodiment of fourth aspect In, the base station Clear to Send frame is identical as the structure of the Clear to Send frame in wlan system.

5th aspect, provides a kind of base station, including memory, processor and storage are in the memory and can be The computer program run on the processor, the processor are realized when executing the computer program as first aspect is any Item the method.

6th aspect, provides a kind of terminal device, including memory, processor and storage are in the memory simultaneously The computer program that can be run on the processor, the processor realize such as second aspect when executing the computer program Any one the method.

7th aspect, provides a kind of computer readable storage medium, the computer-readable recording medium storage has meter Calculation machine program, which is characterized in that realize when the computer program is executed by processor such as any one of first aspect the method.

Eighth aspect, provides a kind of computer readable storage medium, and the computer-readable recording medium storage has meter Calculation machine program, which is characterized in that realize when the computer program is executed by processor such as any one of second aspect the method.

In the embodiment of the present invention, base station will just establish information necessary to radio bearer when sending base station Clear to Send frame It is sent to terminal device, so, terminal device is needed not move through the step of signal is synchronous and reading broadcasts the message and can be established Radio bearer is established the time required for radio bearer to reduce between base station and terminal device, is realized and is quickly established nothing Line carrying.

Detailed description of the invention

Technical solution in order to illustrate the embodiments of the present invention more clearly, below will be to needed in embodiment description Attached drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the invention, general for this field For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is the schematic diagram of the application scenarios of the embodiment of the present application；

Fig. 2 is a kind of interaction figure of method for establishing radio bearer provided in an embodiment of the present invention；

Fig. 3 is the structural schematic diagram of CTS frame in the prior art；

Fig. 4 is the structural schematic diagram of the frame control field in CTS frame shown in Fig. 3；

Fig. 5 is a kind of structural schematic diagram of base station provided in an embodiment of the present invention；

Fig. 6 is a kind of structural schematic diagram of terminal device provided in an embodiment of the present invention；

Fig. 7 is the structural schematic diagram of another base station provided in an embodiment of the present invention；

Fig. 8 is the structural schematic diagram of another terminal device provided in an embodiment of the present invention.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts Example, shall fall within the protection scope of the present invention.

It should be appreciated that ought use in this specification and in the appended claims, term " includes " and "comprising" instruction Described feature, entirety, step, operation, the presence of element and/or component, but one or more of the other feature, whole is not precluded Body, step, operation, the presence or addition of element, component and/or its set.

It is also understood that mesh of the term used in this description of the invention merely for the sake of description specific embodiment And be not intended to limit the present invention.As description of the invention and it is used in the attached claims, unless on Other situations are hereafter clearly indicated, otherwise " one " of singular, "one" and "the" are intended to include plural form.

It will be further appreciated that the term "and/or" used in description of the invention and the appended claims is Refer to any combination and all possible combinations of one or more of associated item listed, and including these combinations.

As used in this specification and in the appended claims, term " if " can be according to context quilt Be construed to " when ... " or " once " or " in response to determination " or " in response to detecting ".Similarly, phrase " if it is determined that " or " if detecting [described condition or event] " can be interpreted to mean according to context " once it is determined that " or " in response to true It is fixed " or " once detecting [described condition or event] " or " in response to detecting [described condition or event] ".

It is the schematic diagram of the application scenarios of the embodiment of the present invention referring to Fig. 1.As shown in Figure 1, wlan system and LTE-U system Altogether enjoy unauthorized frequency range, that is to say, that wlan system needs to carry out data transmission using unauthorized frequency range, LTE-U system It needs to carry out data transmission using unauthorized frequency range.Wherein, unauthorized frequency range can be 2.4GHz ISM (Industrial, Scientific and Medical) and 5GHz U-NII (Unlicensed National Information Infrastructure) frequency band.It is appreciated that other than wlan system, LTE-U system can also with ZigBee system or Bluetooth (Blue Tooth) system etc. shares unauthorized frequency range, moreover, LTE-U system can also share non-award with multiple systems Frequency range is weighed, for example, LTE-U system shares unauthorized frequency range with wlan system, ZigBee system and Bluetooth system simultaneously.

In original design, wlan system works in unauthorized frequency range.Unauthorized frequency range is supplied to wlan system simultaneously And other systems, for example, ZigBee system and Bluetooth system etc. carry out using, that is to say, that wlan system cannot be only Unauthorized frequency range is accounted for, and needs to share unauthorized frequency range with other systems.Therefore, wlan system is needed using CSMA/CA skill Art clashes to avoid when seizing unauthorized frequency range with others system.Moreover, wlan system is using unauthorized frequency range After a period of time, it is necessary to actively discharge unauthorized frequency range be supplied to other systems carry out using.

In original design, LTE-U system has continued to use the design of LTE/LTE-A system.The work of LTE/LTE-A system exists Authorized spectrum band.Authorized spectrum band can only be supplied to authorized person carry out using, that is to say, that LTE/LTE-A system can monopolize authorization Frequency range, without sharing authorized spectrum band with other systems.So LTE/LTE-A system do not need to use CSMA/CA technology with It avoids clashing with other systems when seizing shared authorized spectrum band.It is awarded moreover, LTE/LTE-A system can monopolize for a long time Frequency range is weighed, is carried out with being supplied to other systems using also therefore, LTE/LTE-A system can be with without discharging authorized spectrum band Radio bearer is established using needing the long period that could establish the method for radio bearer described in background technique.

It is appreciated that LTE-U system, when sharing unauthorized frequency range with wlan system, LTE-U system is based on authorized spectrum band Original design clearly not apply to unauthorized frequency range.In fact, fair to guarantee, LTE-U system is using unauthorized frequency Duan Shi, it is also necessary to it is clashed to avoid when seizing unauthorized frequency range with others system using CSMA/CA technology, moreover, LTE-U system using unauthorized frequency range for a period of time after, it is also desirable to discharge unauthorized frequency range actively to be supplied to other systems System carry out using.

But in the scene that LTE-U system and wlan system share unauthorized frequency range, there is a problem of following:

(1), LTE-U system just goes to seize unauthorized frequency range, to lead when no determination can seize unauthorized frequency range LTE-U system and wlan system is caused to clash when seizing unauthorized frequency range, the normal data of severe jamming wlan system passes It is defeated.

(2), LTE-U system is after robbing every time and accounting for unauthorized frequency range, the method weight that will be described according to background technique Radio bearer newly is established, later, newly-built radio bearer transmissions data could be utilized, cause the service efficiency of unauthorized frequency range big It is big to reduce.Specifically, in the scene that LTE-U system and wlan system share unauthorized frequency range, LTE-U system uses unauthorized The time of frequency range is limited (usually 10 milliseconds), after being reached using the time, LTE-U system will discharge unauthorized frequency range with Be supplied to wlan system carry out using.Then, next LTE-U system rob again account for unauthorized frequency range when, LTE-U system with It needs to re-establish radio bearer between terminal device.But wireless bearing method is established using description described in background technique It establishes radio bearer and closely consumes longer time, cause to actually use the time that unauthorized frequency range carries out data transmission big Big to shorten, what is more, possible radio bearer all not yet establishes, just expended the LTE-U system that is over can be used it is unauthorized The time of frequency range seriously affects the service efficiency of unauthorized frequency range.

To solve the above-mentioned problems, the embodiment of the invention provides a kind of method for establishing radio bearer, base station and it is System, can determination can seize it is non-award frequency range when, unauthorized frequency range can be just seized, to reduce LTE-U system and WLAN system Unite the probability that clashes, avoid the normal data transfer of interference wlan system as far as possible, moreover, reduce base station and terminal device it Between establish the time required for radio bearer, realize and quickly establish radio bearer.It will be introduced in detail respectively below.

Referring to fig. 2, Fig. 2 is a kind of interaction figure for method for establishing radio bearer that this bright embodiment provides.Wlan system It is non-centralized control system, that is to say, that in wlan system, the terminal device in system liberally seizes unauthorized frequency range. And LTE-U system is centralized control system, that is to say, that in LTE-U system, the terminal device that is unified for by base station in system Distribute running time-frequency resource.So being shared under the scene of unauthorized frequency range in wlan system and LTE-U system, it may be considered that by LTE-U Unauthorized frequency range is liberally seized in base station in system together with the node in wlan system.Base station in LTE-U system is being robbed The terminal device for accounting for unauthorized frequency range and then being unified in system using unauthorized frequency range distributes running time-frequency resource.Such as Fig. 2 institute Show, the method includes but be not limited to following steps.

101: the unauthorized frequency range is listened to by listening to technology in base station, to obtain intercepted result.

102: base station can seize unauthorized frequency range according to intercepted result determination.

In the embodiment of the present application, the specific implementation procedure of step 101 to step 102 can be as described below:

Step 1: base station, which before seizing unauthorized frequency range, will keep out of the way order, is set as zero.Wherein, keep out of the way order for remembering During once seizing unauthorized frequency range, the terminal device in base station and wlan system because seize unauthorized frequency simultaneously for record Section and the number that clashes.Specifically, if base station is when seizing unauthorized frequency range, because being set with the terminal in wlan system Standby to seize unauthorized frequency range simultaneously and clash, then base station will be kept out of the way (that is, base station abandons seizing non-award at this moment Frequency range is weighed, and the time for seizing unauthorized frequency range is postponed), and order will be kept out of the way and add one.If base station is gone seizing next time When unauthorized frequency range, clashed again because of unauthorized frequency range is seized simultaneously with the terminal device in wlan system, then base Stand to keep out of the way again, and will keep out of the way order and add one again, and so on, until unauthorized frequency range is successfully seized in base station, or Person keeps out of the way order and increases to maximum value.It is appreciated that it is big to keep out of the way order, illustrate that systematic comparison is busy, it is smaller to keep out of the way order, says Bright systematic comparison is idle.

Step 2: one backoff value of random selection in window is kept out of the way from maximum in base station.Wherein, maximum keep out of the way window include from It is small to arrive big multiple backoff values, for example, it includes 5 backoff values [0,5,10,15,20] that maximum, which keeps out of the way window,.Backoff value is for true At the time of determining base station and seize unauthorized frequency range next time, specifically, backoff value is fallen after choosing backoff value in base station Number, when backoff value inverse is zero, base station will seize unauthorized frequency range.It is appreciated that maximum keeps out of the way window and keeps out of the way order phase It closes, keeps out of the way that order is bigger, the maximum backoff value that maximum is kept out of the way in window is bigger.For example, maximum is moved back if keeping out of the way order is zero Keeping away window is [0,5,10,15,20]；If keeping out of the way order is one, it is [5,10,15,20,25] that maximum, which keeps out of the way window,；

Step 3: the unauthorized frequency range is listened to by listening to technology in base station, to obtain intercepted result.Wherein, The technology of listening to, which can be, avoids conflict carrier sense multiple access technology (Carrier Sense Multiple Access/ Collision Avoidance, CSMA/CA).Institute is improved to CSMA/CA technology it is appreciated that listening to technology and can also be Obtained technology, or other technologies, are not especially limited herein.

Specifically, if the time that base station listens to the unauthorized frequency range free time is equal to the length of backoff period, will keep out of the way Value subtracts one；If it is busy that base station listens to unauthorized frequency range, that is, unauthorized frequency range is used in other equipment, then keeps backoff value It is constant.

Step 4: base station determination can seize unauthorized frequency range when backoff value is reduced to zero.

103: the clear to send of base station broadcast base station (LTE Clear to Send, LCTS) frame is to seize the unauthorized frequency Section.Correspondingly, terminal device receives the base station Clear to Send frame of base station broadcast.

In wlan system, just start to access channel when needing to carry out data transmission.For example, an if wireless site (Station) A wants to be communicated, then first can broadcast request send (Request to Send, RTS) frame to access point (Access Point,AP).After AP receives RTS, clear to send (Clear To Send, CTS) frame can be broadcasted, is told all In the wireless site (concealed nodes including wireless site A and for wireless site A) in AP coverage area, wireless site A, which will be accessed, exempts from authorization channel transmission information.And in embodiments of the present invention, since LTE-U system uses centralized scheduling plan Slightly, need to be ready at all times to carry out the transmission of uplink and downlink data, that is, the base station of LTE-U system is regardless of whether there are data to need to transmit all Attempt access channel, it is believed that base station is before accessing channel that is, receives the RTS message that user equipment is sent, therefore needs Send CLTS message, however actually and there is no users to send the RTS message.

In the present invention is implemented, the base station Clear to Send frame in LTE-U system needs to carry first part's information and Two partial informations.Wherein, first part's information for avoid the base station when seizing the unauthorized frequency range with it is described Other nodes in unauthorized frequency range clash, and the second part information is in the base station and the LTE-U system Terminal device establishes radio bearer.That is, first part's information include at least avoid the base station seize it is described Clash necessary information with other nodes when unauthorized frequency range, the second part information include at least the base station with Terminal device establishes information necessary to radio bearer in the LTE-U system.

First part's information and the purposes of the Clear to Send frame in wlan system are the same, and are for notifying other Node device (for example, access point, wireless site etc.) need to occupy unauthorized frequency range, meanwhile, inform other node devices Need to occupy the duration of unauthorized frequency range.

Second part information includes CRS transmission power, antenna end slogan, Physical Cell Identifier, PRACH configuration and timing Lead (Time Alignment, TA), wherein the Timing Advance is used to indicate the base station and the LTE-U system Middle terminal device starts the time point of data transmission.As shown in table 1, CRS transmission power needs to occupy 6 bits, antenna port Number need to occupy 2 bits, Physical Cell Identifier needs to occupy 9 bits, and PRACH configuration needs to occupy 4 bits, periodically mentions Preceding amount needs to occupy 10 bits.

The bit that 1 second part information of table occupies

Information	Bit
		CRS transmission power	6bits
Antenna end slogan	2bits
		Physical Cell Identifier	9bits
PRACH configuration	4bits
		Timing Advance	10bits

In order to enable wlan system interior joint equipment can recognize that the base station that the base station in LTE-U system is issued is removed (LTE Clear To Send, LCTS) frame is sent, the structure of base station Clear to Send frame must be with clear to send in wlan system The structure of (Clear To Send, CTS) frame is identical.It will be introduced in detail below.

As shown in figure 3, Clear to Send frame includes following four field: when frame controls (Frame Control) field, continues Between (Duration) field, receive address (Receiver Address) field and FCS (FrameCheckSequence) word Section.Wherein, frame control field needs to occupy 2 bytes, for carrying frame control message, will carry out below to frame control message in detail Thin introduction first is not unfolded to describe herein.Duration field needs to occupy 2 bytes, accounts for for carrying terminal device needs With the duration of unauthorized frequency range.Destination address field needs to occupy 6 bytes, needs to receive end of Clear to Send frame for carrying The address of end equipment.FCS needs to occupy 4 bytes, and for carrying check code, the check code is used for the frame control word Section, the Duration field and the destination address field are verified.

As shown in figure 4, frame control message includes: version number (protocol), type (Type), subtype (Sub Type), To DS, Form DS, More Frag, retry mark (Retry), PwrMgmt, More Data, protection frame (Protect Frame) and order (order).Wherein, version number occupies 2 bits, and type occupies 2 bits, subtype 2 bits are occupied, To DS occupies 1 bit, and Form DS occupies 1 bit, and More Frag occupies 1 bit, retries mark 1 bit is occupied, PwrMgmt occupies a bit, and More Data occupies a bit, and protection frame occupies a bit, orders Occupy a bit.

Base station Clear to Send frame continues to use the structure of Clear to Send frame substantially, that is, base station Clear to Send frame equally includes frame control Field, Duration field, destination address field and FCS field processed, also, four fields in the Clear to Send frame of base station Length is identical as the length of four fields in Clear to Send frame.But base station Clear to Send frame does not need to control using frame To DS, Form DS, More Frag in field, mark, PwrMgmt, More Data, protection frame and order mark are retried Know, that is, base station Clear to Send frame is not needed using the bit 8 in frame control field to bit 15, totally 8 bits.In addition, base station Destination address field is only needed using 2 bytes (radio network temporary identifier (Radio of i.e. 16 bits in Clear to Send frame Network Temporary Identity, RNTI)), therefore do not need using remaining 4 bytes (i.e. 32 bits).For It for the sake of easy, needs the bit used to be known as busy bit base station Clear to Send frame below, does not need using arriving Bit is known as idle bit.It is apparent that the quantity of idle bit is 40 bits.

The base station Clear to Send frame can carry first part's information with busy bit, with busy bit with holding Carry second part information.In a specific embodiment, the idle bit in frame control field can be used for carrying CRS transmitting function Rate and antenna end slogan, and the idle bit in destination address field can be used for carrying Physical Cell Identifier, PRACH configuration And Timing Advance.In another specific embodiment, destination address field can be used for carrying CRS transmission power, antenna Port numbers, Physical Cell Identifier, PRACH configuration and Timing Advance.

104: terminal device is based on the second part information to base station initiating random access procedure, and correspondingly, base station is rung The random access procedure for answering the terminal device to initiate based on the second part information.

105: radio bearer is established between base station and terminal device.

It should be noted that step 104 and the complete phase of method for establishing wireless load-bearing described in step 105 and background technique Together, not reinflated description herein.

The application's has the beneficial effect that in the method for establishing wireless load-bearing described in background technique, terminal device need through The step of crossing synchronous signal and reading broadcast message can obtain CRS transmission power, day necessary to establishing radio bearer The information such as line end slogan, Physical Cell Identifier, PRACH configuration, still, in the embodiment of the present application, base station is clear in transmission base station It is sent to terminal device except will just establish information necessary to radio bearer when sending frame, so, terminal device needs not move through letter Number synchronous and the step of reading broadcast message, can establish radio bearer, build between base station and terminal device to reduce It time required for vertical radio bearer, realizes and quickly establishes radio bearer.

In addition, the parameter setting of LTE-U system cannot continue to use the parameter configuration in LTE system completely.It is sent out in LTE-U system It includes but is not limited to following several for having given birth to the parameter of variation:

(1), in LTE system, channel width can be set as 1.3MHZ, 5MHZ, 10MHZ, 15MHZ etc. letter by selection Road bandwidth carries out data transmission.But in LTE-U system, channel width, which is fixed, is set as 20MHZ.This is because non-award It is 20MHZ that power frequency range is allocated to the channel width that LTE-U system uses every time, if LTE-U system is set to less than The channel width of 20MHZ will will lead to the waste of frequency spectrum resource.Certainly, if not considering the waste of frequency spectrum resource, LTE-U system Channel width also can be set to the channel width less than 20MHZ, be not especially limited herein.

(2), in LTE system, classifying type or frequency division type (TDD or FDD) when system type can be.But In LTE-U system, classifying type (TDD) when system type is usually only arranged to.Wherein, independent channel there are two FDD, one A to be used for uplink, another is used for downlink transfer.There are a protection frequency ranges between two channels, to prevent uplink It generates and interferes with each other between downlink transfer.And TDD is uplink and downlink transfer is in the difference of same frequency channel It carries out, is transmitted each other using the different time, to realize uplink and the separation of downlink transfer in gap.

Since in LTE-U system, the data volume of the downstream transmission of data is usually asymmetric, using TDD type The time of downstream transmission can be easily distributed according to the data volume of downstream transmission.For example, working as the data of uplink It measures bigger, when the data volume of downlink transfer is smaller, can be distributed to uplink the more time, give downlink transfer distribution The less time, can be to uplink point when the data volume of downlink transfer is bigger when the data volume of uplink is smaller With the less time, the more time is distributed to downlink transfer.Certainly, if not considering the waste of frequency spectrum resource, LTE-U system System type also can be set to FDD type, be not especially limited herein.

(3), in LTE system, CP type can be general type and be also possible to expansion type.But in LTE-U system In, the type of CP is usually only arranged to general type.Wherein, length shared by the CP of general type is shorter, expansion type Length shared by CP is longer, therefore, in conventional CP, as soon as time slot includes 7 symbols, then 1 subframe includes 14 A symbol, and extending CP1 time slot includes 6 symbols, 1 subframe is exactly 12 symbols.The difference pair of conventional CP and extension CP Normal coverage cell and big coverage cell are answered, because cell is bigger, multipath fading is more severe, and the CP length needed is longer.Often Rule CP can resist the 4.76us i.e. multipath fading of 1.4km, and extension CP can resist the 16.67us i.e. multipath fading of 5km.

Since in LTE-U system, the coverage area using the cell of the LTE-U system of unauthorized frequency range usually all compares It is small, it need to only use general type.Certainly, if not considering the waste of running time-frequency resource, the CP type of LTE-U system can also be with It is arranged to expansion type, is not especially limited herein.

(4), in LTE system, the random access format (PRACH format) that random access procedure can use has 5 Kind, comprising: random access format 0, random access format 1, random access format 2, random access format 3 and random access lattice Formula 4.And in LTE-U system, the format that random access procedure can use can only be random access format 4.Wherein,

Random access format 0: suitable for small, medium-sized cell, largest cell radius 14.53km.

Random access format 1: suitable for large-scale cell, largest cell radius is 77.34km.

Random access format 2: being suitable for medium-sized plot, and largest cell radius is 29.53km.

Random access format 3: being suitable for ultra-large type cell, and largest cell radius is 100.16km, is generally used for sea, orphan The scene that island etc. needs extra long distance to cover.

Random access format 4: the dedicated format of tdd mode, 157.292 microsecond of duration (2 OFDM symbols it is prominent Hair), it is suitable for small cell, radius of society≤1.4km is generally used for short distance covering, and especially dense urban, interior are covered The scenes such as lid or hot spot supplement covering.

Since in LTE-U system, LTE-U system generally uses small cell, and radius of society≤1.4km, in order to The availability of frequency spectrum is improved, LTE-U system carries out random access only with random access format 4.Certainly, if not considering frequency spectrum benefit With rate, LTE-U system can also carry out random access using random access format 0 to 3, be not especially limited herein.

It is a kind of schematic block diagram of base station provided in an embodiment of the present invention referring to Fig. 5, Fig. 5.As shown in figure 5, the base station For the base station in LTE-U system, the base station comprises determining that unit 501, radio unit 502 and establishes unit 503.

Determination unit 501 can seize unauthorized frequency range for determination, wherein the base station belongs to the LTE-U system；

Radio unit 502 is for broadcast base station Clear to Send frame to seize the unauthorized frequency range, wherein the base station is clear It include first part's information and second part information except frame is sent, first part's information is for avoiding the base station from robbing It is clashed when accounting for the unauthorized frequency range with other nodes in the unauthorized frequency range, the second part information is used for institute It states terminal device in base station and the LTE-U system and establishes radio bearer；

Unit 503 is established for responding the random access mistake that the terminal device is initiated based on the second part information Journey, to establish radio bearer.

In some possible embodiments, first part's information includes the duration, wherein the duration It is used to indicate the duration that the base station occupies the unauthorized frequency range；The second part information includes CRS transmission power, antenna Port numbers, Physical Cell Identifier, PRACH configuration and Timing Advance, wherein the Timing Advance is used to indicate the base It stands and starts the time point of data transmission with terminal device in the LTE-U system.

In some possible embodiments, the base station Clear to Send frame include frame control field, Duration field, Destination address field and inspection field, wherein the frame control field is for carrying the CRS transmission power and the day Line end slogan；The Duration field is for carrying the duration；The destination address field is for carrying the object Manage cell ID, PRACH configuration and Timing Advance；The FCS field is for carrying check code, wherein the check code For being verified to the frame control field, the Duration field and the destination address field.

In some possible embodiments, the knot of the base station Clear to Send frame and the Clear to Send frame in wlan system Structure is identical.

In some possible embodiments, the determining module 501 is used for by listening to technology to described unauthorized Frequency range is listened to, and to obtain intercepted result, and in the case where the intercepted result meets preemptive condition, determination can seize unauthorized Frequency range.

In some possible embodiments, the technology of listening to is to avoid conflict carrier sense multiple access technology.

It should be noted that passing through the detailed description of 2 embodiment of earlier figures, those skilled in the art are clear that base The implementation method for each functional module for being included of standing specifically refers to so this will not be detailed here in order to illustrate the succinct of book Fig. 2 and associated description.

It is a kind of schematic block diagram of terminal device provided in an embodiment of the present invention referring to Fig. 6, Fig. 6.As shown in fig. 6, described Terminal device includes: receiving unit 601 and establishes unit 602.

The receiving unit 601 is used to receive the base station Clear to Send frame of base station broadcast, wherein the base station clear to send Frame carries first part's information and second part information, first part's information for avoid the base station seize it is described It is clashed when unauthorized frequency range with other nodes in the unauthorized frequency range, the second part information is used for the base station Radio bearer is established with terminal device in the LTE-U system；

The unit 602 of establishing for based on the second information initiating random access procedure, with base station foundation Radio bearer.

In some possible embodiments, first part's information includes the duration, wherein the duration It is used to indicate the duration that the base station occupies the unauthorized frequency range；

In some possible embodiments, the base station Clear to Send frame include frame control field, Duration field, Destination address field and inspection field, wherein

The Duration field is for carrying the duration；

In some possible embodiments, the knot of the base station Clear to Send frame and the Clear to Send frame in wlan system Structure is identical.It should be noted that passing through the detailed description of 2 embodiment of earlier figures, those skilled in the art are clear that end The implementation method for each functional module that end equipment is included specifically is asked so this will not be detailed here in order to illustrate the succinct of book Referring to fig. 2 and associated description.

Based on the same inventive concept, the embodiment of the present invention also provides a kind of base station (as shown in Figure 7), the base station for realizing Method described in 2 embodiment of earlier figures.As shown in fig. 7, base station includes: transmitter 703, receiver 704,702 and of memory (quantity of processor 701 can be one or more to the processor 701 coupled with memory 702, with a processor in Fig. 7 For).Transmitter 703, receiver 704, memory 702 and processor 701 can connect (Fig. 7 by bus or other way In by by bus connect for).Wherein, transmitter 703 is used to send data to outside, and receiver 704 from outside for connecing Receive data.Memory 702 is for storing program code, and processor 701 is for calling and running the journey being stored in memory 702 Sequence code.

The program code stored in memory 702 is specifically used for realizing the function of the base station in Fig. 2 embodiment.Specifically , processor 701 executes following steps for calling the program code stored in memory 702:

Base station can seize unauthorized frequency range for determination by processor 701, wherein the base station belongs to the LTE- U system；

The base station is by 703 broadcast base station Clear to Send frame of transmitter to seize the unauthorized frequency range, wherein described Base station Clear to Send frame includes in base station Clear to Send frame described in first part's information and second part information and wlan system Clear to Send frame structure it is identical.；

The base station is based on the second part information by processor 701 and quickly establishes radio bearer.

In some possible embodiments, the receiver 704 of the base station is to by listening to technology to described unauthorized Frequency range is listened to, to obtain intercepted result；The processor 701 of the base station in the case where the intercepted result meets preemptive condition, Determination can seize unauthorized frequency range.

It should be noted that the other technical characteristics that the execution step and processor 701 of processor 701 are related to may further reference The related content of base station described in Fig. 2 embodiment of the method, which is not described herein again.

Based on the same inventive concept, the embodiment of the present invention also provides a kind of terminal device.The terminal device includes: processing Device 801, memory 802 (one or more computer readable storage mediums), communication module 803, input-output system 805.This A little components can communicate on one or more communication bus 804.

Input-output system 805 is mainly used for realizing the interactive function between terminal device and user/external environment, mainly Input/output unit including terminal device.In the specific implementation, input-output system 805 may include touch screen controller 8052, Audio Controller 8052 and sensor controller 8053.Wherein, each controller (can be touched with corresponding peripheral equipment Screen 8054, voicefrequency circuit 8055 and motion sensor 8056 couple.In the specific implementation, motion sensor 8056 may include accelerating Degree meter, gyroscope and magnetometer etc. acquire the exercise data of user for monitoring the motion state of user, such as movement step number, Move cadence etc..It should be noted that input-output system 805 can also include other I/O peripheral hardwares.

It includes: one or more CPU, clock module and power management module that processor 801, which can integrate,.The clock mould Block is mainly used for generating clock required for data transmission and timing control for processor 801.The power management module is main For providing stable, pinpoint accuracy voltage for processor 801, communication module 803 and input-output system 805 etc..

Communication module 803 is mainly integrated with the receiver and transmitter of terminal device for sending and receiving wireless signal. In the specific implementation, communication module 803 may include but be not limited to: Wi-Fi module, bluetooth module.Wi-Fi module, bluetooth module can It is respectively used to other communication equipments.In some embodiments, communication module 803 can be realized on a separate chip.

Memory 802 is coupled with processor 801, for storing various software programs and/or multiple groups instruction.Specific implementation In, memory 802 may include the memory of high random access, and may also comprise nonvolatile memory, such as one or Multiple disk storage equipments, flash memory device or other non-volatile solid-state memory devices.Memory 802 can store an operating system (following abbreviation systems), such as the embedded OSs such as ANDROID, IOS, WINDOWS or LINUX.Memory 802 is also It can store network communication program, which can be used for being communicated with one or more terminal devices.Memory 802 can also store user interface program, which can be by patterned operation interface, by application program Content image is true to nature to be shown, and receives user to application program by input controls such as menu, dialog box and keys Control operation.

The program code stored in memory 802 is specifically used for realizing the function of the terminal device in Fig. 2 embodiment. Specifically, processor 801 is used to call the program code stored in memory 802, and execute following steps:

Terminal device receives the base station Clear to Send frame of base station broadcast by communication module 803, wherein removes the base station It sends frame and carries first part's information and second part information, first part's information is for avoiding the base station from seizing It is clashed when the unauthorized frequency range with other nodes in the unauthorized frequency range, the second part information is for described Terminal device establishes radio bearer in base station and the LTE-U system；

The terminal device by communication module 803 be based on the second information initiating random access procedure, with it is described Radio bearer is established in base station.

The Duration field is for carrying the duration；

It should be noted that the other technical characteristics that the execution step and processor 801 of processor 801 are related to may further reference The related content of base station described in Fig. 2 embodiment of the method, which is not described herein again.

A kind of computer readable storage medium, the computer-readable storage medium are provided in another embodiment of the invention Matter is stored with computer program, the realization when computer program is executed by processor:

Determination can seize unauthorized frequency range, wherein the base station belongs to the LTE-U system；

Broadcast base station Clear to Send frame is to seize the unauthorized frequency range, wherein the base station Clear to Send frame includes the A part of information and second part information, first part's information is for avoiding the base station from seizing the unauthorized frequency Other nodes in unauthorized frequency range described in Duan Shiyu clash, the second part information for the base station with it is described Terminal device establishes radio bearer in LTE-U system；

In some possible embodiments, base station determination can seize unauthorized frequency range specifically: the base station is to logical It crosses the technology of listening to listen to the unauthorized frequency range, to obtain intercepted result；The base station meets in the intercepted result Under preemptive condition, determination can seize unauthorized frequency range.

The computer readable storage medium can be the internal storage unit of base station described in aforementioned any embodiment, example Such as the hard disk or memory of base station.The computer readable storage medium is also possible to the External memory equipment of the base station, such as The plug-in type hard disk being equipped on the base station, intelligent memory card (Smart Media Card, SMC), secure digital (Secure Digital, SD) card, flash card (Flash Card) etc..Further, the computer readable storage medium can also be wrapped both The internal storage unit for including the base station also includes External memory equipment.The computer readable storage medium is described for storing Other programs and data needed for computer program and the terminal.The computer readable storage medium can be also used for temporarily When store the data that has exported or will export.

Receive the base station Clear to Send frame of base station broadcast, wherein the base station Clear to Send frame carries first part's information And second part information, first part's information for avoid the base station when seizing the unauthorized frequency range with it is described Other nodes in unauthorized frequency range clash, and the second part information is in the base station and the LTE-U system Terminal device establishes radio bearer；

Based on the second information initiating random access procedure, to establish radio bearer with the base station.

The Duration field is for carrying the duration；

In addition, the communication system includes: base station and terminal device the embodiment of the invention also provides a kind of communication system. The base station and the terminal device respectively correspond the base station and the terminal device in Fig. 2 embodiment of the method.For example, base Station can be base station shown in fig. 5, and terminal device is terminal device shown in fig. 6.Alternatively, base station can be base shown in Fig. 7 It stands, terminal device is terminal device shown in Fig. 8.

Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure Member and algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware With the interchangeability of software, each exemplary composition and step are generally described according to function in the above description.This A little functions are implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Specially Industry technical staff can use different methods to achieve the described function each specific application, but this realization is not It is considered as beyond the scope of this invention.

It is apparent to those skilled in the art that for convenience of description and succinctly, foregoing description is It unites, the specific work process of base station and unit, can refer to corresponding processes in the foregoing method embodiment, details are not described herein.

In several embodiments provided herein, it should be understood that disclosed system, terminal and method, it can be with It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components It can be combined or can be integrated into another system, or some features can be ignored or not executed.In addition, shown or beg for Opinion mutual coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING of device or unit Or communication connection, it is also possible to electricity, mechanical or other form connections.

The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple In network unit.Some or all of unit therein can be selected to realize the embodiment of the present invention according to the actual needs Purpose.

It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit It is that each unit physically exists alone, is also possible to two or more units and is integrated in one unit.It is above-mentioned integrated Unit both can take the form of hardware realization, can also realize in the form of software functional units.

If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words It embodies, which is stored in a storage medium, including some instructions are used so that a computer Equipment (can be personal computer, server or the network equipment etc.) executes the complete of each embodiment the method for the present invention Portion or part steps.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey The medium of sequence code.

The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right It is required that protection scope subject to.

Claims

1. a kind of method for establishing radio bearer, which is characterized in that the method is applied to LTE-U system and shares unauthorized frequency range Scene, which comprises

Base station broadcast base station Clear to Send frame is to seize the unauthorized frequency range, wherein the base station Clear to Send frame packet Include first part's information and second part information, first part's information is for avoiding the base station from seizing described non-award It is clashed when weighing frequency range with other nodes in the unauthorized frequency range, the second part information is used for the base station and institute It states terminal device in LTE-U system and establishes radio bearer；

The random access procedure that terminal device described in the base station in response is initiated based on the second part information, it is wireless to establish Carrying.

2. the method according to claim 1, wherein

First part's information includes the duration, wherein it is described non-that the duration is used to indicate the base station occupancy The duration of authorized spectrum band；

The second part information includes CRS transmission power, antenna end slogan, Physical Cell Identifier, PRACH configuration and timing Lead, wherein the Timing Advance is used to indicate terminal device in the base station and the LTE-U system and starts data biography Defeated time point.

3. according to the method described in claim 2, it is characterized in that, the base station Clear to Send frame includes frame control field, holds Continuous time field, destination address field and inspection field, wherein

The Duration field is for carrying the duration；

The FCS field is for carrying check code, wherein the check code be used for the frame control field, it is described continue when Between field and the destination address field verified.

4. method according to claim 1-3, which is characterized in that the base station Clear to Send frame and wlan system In Clear to Send frame structure it is identical.

5. method according to any one of claims 1 to 3, which is characterized in that base station determination can seize unauthorized frequency range Specifically:

6. according to the method described in claim 5, it is characterized in that, the technology of listening to is that conflict carrier sense multiple is avoided to connect Enter technology.

7. a kind of method for establishing radio bearer, which is characterized in that the method is applied to LTE-U system and shares unauthorized frequency range Scene, which comprises

The base station Clear to Send frame of terminal device reception base station broadcast, wherein the base station Clear to Send frame carries first part Information and second part information, first part's information for avoid the base station when seizing the unauthorized frequency range with Other nodes in the unauthorized frequency range clash, and the second part information is for the base station and the LTE-U system Terminal device establishes radio bearer in system；

The terminal device is based on the second information initiating random access procedure, to establish radio bearer with the base station.

8. the method according to the description of claim 7 is characterized in that

9. according to the method described in claim 8, it is characterized in that, the base station Clear to Send frame includes frame control field, holds Continuous time field, destination address field and inspection field, wherein

The Duration field is for carrying the duration；

10. according to method described in claim 6-9 any claim, which is characterized in that the base station Clear to Send frame with The structure of Clear to Send frame in wlan system is identical.

11. a kind of base station, which is characterized in that the base station is the base station in LTE-U system, and the base station includes:

Determination unit can seize unauthorized frequency range for determination；

Radio unit seizes the unauthorized frequency range for broadcast base station Clear to Send frame, wherein the base station clear to send Frame includes first part's information and second part information, first part's information for avoid the base station seize it is described It is clashed when unauthorized frequency range with other nodes in the unauthorized frequency range, the second part information is used for the base station Radio bearer is established with terminal device in the LTE-U system；

Unit is established, the random access procedure initiated for responding the terminal device based on the second part information, to build Vertical radio bearer.

12. base station according to claim 11, which is characterized in that

13. base station according to claim 12, which is characterized in that the base station Clear to Send frame include frame control field, Duration field, destination address field and inspection field, wherein

The Duration field is for carrying the duration；

14. base station described in 1-13 any claim according to claim 1, which is characterized in that the base station Clear to Send frame It is identical as the structure of the Clear to Send frame in wlan system.

15. base station described in 1 to 13 any claim according to claim 1, which is characterized in that the determination unit for pair The unauthorized frequency range is listened to by listening to technology, to obtain intercepted result；Item is seized in intercepted result satisfaction Under part, determination can seize unauthorized frequency range.

16. base station according to claim 15, which is characterized in that the technology of listening to is to avoid conflict carrier sense multiple Access technology.

17. a kind of terminal device, which is characterized in that the terminal device belongs to LTE-U system, and the terminal device includes: to connect It receives unit and establishes unit

The receiving unit is used to receive the base station Clear to Send frame of base station broadcast, wherein the base station Clear to Send frame carries First part's information and second part information, first part's information for avoid the base station seize it is described unauthorized Clashed when frequency range with other nodes in the unauthorized frequency range, the second part information for the base station with it is described Terminal device establishes radio bearer in LTE-U system；

The unit of establishing is for based on the second information initiating random access procedure, wirelessly to hold with base station foundation It carries.

18. terminal device according to claim 17, which is characterized in that

19. terminal device according to claim 18, which is characterized in that the base station Clear to Send frame includes frame control word Section, Duration field, destination address field and inspection field, wherein

The Duration field is for carrying the duration；

20. terminal device described in 7 to 19 any claims according to claim 1, which is characterized in that remove hair in the base station Send frame identical as the structure of the Clear to Send frame in wlan system.

21. a kind of base station, which is characterized in that in the memory and can be described including memory, processor and storage The computer program run on processor, the processor are realized when executing the computer program as claim 1 to 6 is any Item the method.

22. a kind of terminal device, which is characterized in that in the memory and can be including memory, processor and storage The computer program run on the processor, the processor realized when executing the computer program as claim 7 to Any one of 10 the methods.

23. a kind of computer readable storage medium, the computer-readable recording medium storage has computer program, and feature exists In any one of such as claim 1 to 6 of realization the method when the computer program is executed by processor.

24. a kind of computer readable storage medium, the computer-readable recording medium storage has computer program, and feature exists In any one of such as claim 7 to 10 of realization the method when the computer program is executed by processor.