CN105897387A

CN105897387A - Data transmission method, device and system

Info

Publication number: CN105897387A
Application number: CN201510039420.5A
Authority: CN
Inventors: 梁春丽; 戴博; 杨维维; 鲁照华
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2015-01-26
Filing date: 2015-01-26
Publication date: 2016-08-24
Also published as: WO2016119443A1

Abstract

The embodiment of the invention discloses a data transmission method, a device and a system. The method comprises a step of determining the detection position of a clear channel assessment (CCA), a step of carrying out CCA detection at the detection position of the CCA, and a step of carrying out data transmission in an unauthorized carrier in a condition that the detection result is that the unauthorized carrier is in an idle state, wherein, the data transmission comprises uplink and/or downlink transmission. According to the technical scheme of the embodiment of the invention, the detection position of the CCA is not the fixed position in a transmission frame, the adjustment can be carried out according to an actual condition, thus the access opportunity of FBE can be increased, and transmission delays are reduced.

Description

A kind of data transmission method, Apparatus and system

Technical field

The present invention relates to wireless communication technology field, particularly relate to a kind of data transmission method, Apparatus and system.

Background technology

Run it is known that LTE is deployed in mandate carrier wave, but be as the quick increasing of data service Long, in the near future, authorize carrier wave can not bear such googol again according to amount.Therefore, award non- Power carrier wave disposes LTE, is shared the data traffic authorized in carrier wave by unauthorized carrier wave, be follow-up LTE One important evolution tendency of development.

It addition, for unauthorized carrier wave, also there is a lot of advantage: free/low expense；Requirements for sale is low, Low cost, such as individual, enterprise can participate in disposing, and the equipment of equipment vendor can be any；Many When individual different system operation is shared in frequency spectrum, or the different operators of same system is runed in unauthorized carrier wave Time, it may be considered that the mode of some shared resources, to improve spectrum efficiency；Wireless access technology is many；Wireless Access website is many；Application is many, and from the point of view of related data shows, multi-service is mentioned can be at unauthorized carrier wave Middle operation, such as machine to machine (M2M, Machine to Machine), automobile to automobile (V2V, Vehicle to vehicle) etc. business.

Working method for unauthorized carrier wave, it is common that by means of authorizing carrier wave, the most unauthorized carrier wave Carrying out work by the way of carrier aggregation with authorizing carrier wave (being operated under LTE pattern), this mode is referred to as Photocarrier method is authorized to access (LAA, Licensed-Assistant Access).Furthermore, it is contemplated that unauthorized load Ripple, has multiple system and is also operated on identical frequency spectrum, such as WIFI system.Therefore, LTE is operated in On unauthorized carrier wave, solve with the coexistence problems of other system it is critical that.And, in some country And area, for the use of unlicensed spectrum, there is corresponding Control Policy.To this end, for unauthorized carrier wave Control limit, formulate corresponding data transmission method, be LTE system use unauthorized carrier wave urgently to be resolved hurrily A problem.

In the countries and regions having control to require the use of unauthorized carrier wave, must before using unauthorized carrier wave Channel must be carried out and can detect (also referred to as CCA, Clear Channel Assessment) by situation, when detection knot Fruit is idle, could use described unauthorized carrier wave, if testing result is busy, then proceed to intercept, Or carry out intercepting (said process is referred to as LBT:listen before talk) on next transmission frame.

Below as a example by the Europe that the use to unlicensed spectrum has control to require, brief description is the most European Two kinds of LBT behaviors that country is supported, a kind of is for equipment FBE (Frame-based based on frame Equipment), another kind is for equipment LBE (Load-based Equipment) based on load.

As shown in Figure 1A, for FBE, there is fixing transmission frame-form, Channel holding time and free time Period constitutes the fixing frame period, and the equipment phase at one's leisure carries out CCA detection, when detecting that channel is idle, Then can carry out data transmission immediately, otherwise, the idle period in the next anchor-frame cycle carries out CCA again Detection.For the FBE in Europe, Channel holding time is 1 millisecond to 10 milliseconds, idle period at least letter The 5% of road holding time.Concrete Channel holding time can configure.CCA detection is lasting the shortest Time has regulation in control, and the shortest detection not less than 20us, CCA can be based on energy measuring, also Can be based on signal detection.

As shown in Figure 1B, for LBE, as the term suggests, based on load, when there being data transfer demands, Equipment just starts to carry out CCA detection, if after carrying out CCA detection, finds when channel is idle, Then can carry out data transmission immediately, the maximum time that data transmission can take is (13/32) × q ms, wherein Q={4 ... 32} is configurable；Otherwise, enter extension CCA and detect period, X time to be carried out CCA detects, and the value of X is stored in an enumerator, and wherein X value randomly selects in 1 to q, every time If it find that channel is idle, then enumerator starts in CCA detection (each CCA detection time is identical) Successively decreasing, if channel is not idle, then enumerator does not successively decreases, when enumerator is decremented to 0, the most permissible Proceeding by data transmission, data transmission period determines according to demand, but maximum not can exceed that (13/32) × q ms。

For FBE, if the result of CCA detection is channel busy, then must be in next transmission frame regulation Position could again carry out CCA detection, the result so caused is exactly that LAA transmission node can use Low than other system (such as WIFI) of the chance of unauthorized carrier wave, and, due to necessary if channel busy By the time next transmission frame just has an opportunity to be transmitted, thus transmission delay is bigger.

Summary of the invention

In view of this, for solving the technical problem of existing existence, the embodiment of the present invention provides:

A kind of data transmission method, including:

Determine that channel can be with the detection position of situation detection CCA；

The detection position of described CCA carries out CCA detection；

Testing result is in the case of unauthorized carrier wave is in idle condition, carries out in described unauthorized carrier wave Data are transmitted, and wherein, the transmission of described data includes uplink and/or downlink transfer.

In one specific embodiment, the mode of at least one of is used to determine the detection position of CCA:

The detection position of CCA is determined according to predefined or configuration mode；

Frame length according to transmission frame determines the detection position of CCA；

Transmission timing relationship according to scheduling authorization and correspondence determines the detection position of CCA.

In one specific embodiment, the described frame length according to transmission frame determines under the scene of detection position of CCA, When there is multiple transmission frame length, position in the transmission frame of different transmission frame lengths, the detection position of described CCA Put identical.

In one specific embodiment, satisfied at least one condition following in the detection position of described CCA:

Transmission frame is uniformly distributed；

In Preset Time constant, or dynamically change in each transmission frame；

At least in last subframe being positioned at transmission frame；

At least in first subframe being positioned at transmission frame.

In one specific embodiment, detection position at least last subframe being positioned at transmission frame of CCA Time upper, described in be positioned at last subframe of transmission frame intercept subframe comprise successively a data transmission region and One free time region, described free time region persistent period not less than requiring for meeting control Short free time, wherein, described in intercept subframe and refer to comprise the subframe of CCA detection position.

In one specific embodiment, when described transmission frame comprise multiple intercept subframe time, except to be positioned at transmission frame last One subframe intercept outside subframe other intercept subframe and comprise a data transmission region and a sky successively Not busy time zone, the persistent period in region described free time is to carry out the most unauthorized carrier wave during control requires Whether it is in the time needed for idle condition detection, or is N number of transmission symbol duration, wherein N is the integer more than 0.

In one specific embodiment, in detection position at least first subframe being positioned at transmission frame of CCA Time, described in be positioned at first subframe of transmission frame intercept subframe comprise successively one free time region and Data transmission region, the persistent period in region described free time is to carry out the most unauthorized load during control requires Whether ripple is in the time needed for idle condition detection, or is N number of transmission symbol duration, its Middle N is the integer more than 0；Last subframe of described transmission frame only comprises a data transmission region, Or, comprise successively a data transmission region and one free time region, last subframe described Free time region persistent period not less than for meet the shortest free time that control requires with described first Difference between the free time of subframe, and minima is zero；Wherein, intercept subframe described in refer to comprise CCA The subframe of detection position.

In one specific embodiment, when described transmission frame comprise multiple intercept subframe time, described in intercept subframe successively Comprise one free time a region and data transmission region, the persistent period in region described free time is Control carries out in requiring whether the most unauthorized carrier wave is in the time needed for idle condition detection, or is N Individual transmission symbol duration, wherein N is the integer more than 0.

In one specific embodiment, when described transmission frame comprise be positioned at last subframe of transmission frame intercept subframe Time, described in intercept subframe comprise successively first free time region, data transmission region and the second free time Region, wherein said first free time region persistent period be carry out during control requires the most unauthorized Whether carrier wave is in the time needed for idle condition detection, or is N number of transmission symbol duration, Wherein N is the integer more than 0；Described second free time region persistent period not less than for meeting pipe Make the difference between the shortest free time and the free time of described first subframe required, and minima is Zero.

In one specific embodiment, the detection position of described CCA carries out CCA detection, including: detecing Listen subframe free time region or first free time region end carry out CCA detection.

In one specific embodiment, when the detection position of described CCA is fixed according to the transmission of scheduling authorization and correspondence Time relation when determining, the first transmission node sends scheduling authorization in subframe #n to the second transmission node, and second passes Defeated node carries out CCA detection at the end of subframe #n+k-1, or proceeds by CCA in subframe #n+k Detection,

Wherein, described k determines according to one of following mode:

The timing relationship that described k transmits according to the scheduling authorization preset and data determines, wherein, and described data It is transmitted as the transmission of Physical Uplink Shared Channel PUSCH；

Described k is predefined value.

In one specific embodiment, when described second transmission node carries out CCA inspection at the end of subframe #n+k-1 During survey, when described second transmission node carries out PUSCH transmission, delete last PUSCH transmission subframe At least one symbol last；

When described second transmission node subframe #n+k proceed by CCA detection time, described second transmission When node carries out PUSCH transmission, delete at least one symbol before first PUSCH transmission subframe.

In one specific embodiment, when described CCA testing result is channel idle, described second transmission node According to described scheduling authorization, subframe #n+k of described unauthorized carrier wave carries out PUSCH transmission, or, In subframe #n+k of described unauthorized carrier wave and carry out data transmission at least one subframe of continuous print thereafter；

When described CCA testing result is channel busy, described second transmission node is at described unauthorized carrier wave The end of subframe #n+k+p+q-1 re-starts CCA detection, or the subframe at described unauthorized carrier wave CCA detection, or the subframe at described unauthorized carrier wave is carried out on first symbol of #n+k+p+q The end of #n+k+m-1 re-starts CCA detection, or subframe #n+k+m at described unauthorized carrier wave Carrying out CCA detection on first symbol, wherein, described p and q is respectively by PUSCH and physical mixed HARQ indicates channel PHICH, and the timing relationship of PHICH with PUSCH determines, described K and m be predefined value, the value of m and k is used in the frame length of transmission frame and transmission frame The quantity of the subframe of PUSCH transmission is relevant.

The embodiment of the present invention also provides for a kind of data transmission device, including: detection position determination module, detection Module and data transmission module；Wherein,

Described detection position determination module, for determining that channel can be with the detection position of situation detection CCA；

Described detection module, for carrying out CCA detection on the detection position of described CCA；

Described data transmission module, being used in the testing result of detection module is that unauthorized carrier wave is in idle shape In the case of state, carrying out data transmission in described unauthorized carrier wave, wherein, the transmission of described data includes Row transmission and/or downlink transfer.

In one specific embodiment, described detection position determination module is specifically for using the side of at least one of Formula determines the detection position of CCA:

In one specific embodiment, described detection position determination module determines the inspection of CCA according to the frame length of transmission frame Under the scene that location is put, when there is multiple transmission frame length, the detection position of described CCA is at different transmission frames The long position in transmission frame is identical.

In one specific embodiment, the detection position of the CCA that described detection position determination module determines meet below At least one condition:

Transmission frame is uniformly distributed；

In Preset Time constant, or dynamically change in each transmission frame；

At least in last subframe being positioned at transmission frame；

At least in first subframe being positioned at transmission frame.

In one specific embodiment, described detection module, in the free time region or first intercepting subframe The free time end in region carries out CCA detection.

The embodiment of the present invention also provides for a kind of data transmission system, including the first transmission node and the second transmission joint Point, the detection position of CCA determines according to the transmission timing relationship of scheduling authorization and correspondence；Wherein,

First transmission node, for sending scheduling authorization in subframe #n to the second transmission node；

Second transmission node, carries out CCA detection for the end in subframe #n+k-1, or in subframe #n+k Proceed by CCA detection, testing result is in the case of unauthorized carrier wave is in idle condition, described Carrying out data transmission in unauthorized carrier wave, wherein, the transmission of described data includes uplink and/or downlink transfer,

Wherein, described k determines according to one of following mode:

Described k is predefined value.

In one specific embodiment, when described second transmission node carries out CCA inspection at the end of subframe #n+k-1 During survey, when described second transmission node carries out PUSCH transmission, it is additionally operable to delete last PUSCH and passes At least one symbol last of defeated subframe；

When described second transmission node subframe #n+k proceed by CCA detection time, described second transmission When node carries out PUSCH transmission, it is additionally operable to delete at least one before first PUSCH transmission subframe Symbol.

In one specific embodiment, when described CCA testing result is channel idle, described second transmission node According to described scheduling authorization, subframe #n+k of described unauthorized carrier wave carries out PUSCH transmission, or, In subframe #n+k of described unauthorized carrier wave and carry out data transmission at least one subframe of continuous print thereafter； When described CCA testing result is channel busy, described second transmission node is in the subframe of described unauthorized carrier wave The end of #n+k+p+q-1 re-starts CCA detection, or the subframe at described unauthorized carrier wave CCA detection, or the subframe at described unauthorized carrier wave is carried out on first symbol of #n+k+p+q The end of #n+k+m-1 re-starts CCA detection, or subframe #n+k+m at described unauthorized carrier wave Carrying out CCA detection on first symbol, wherein, described p and q is respectively by PUSCH and physical mixed HARQ indicates channel PHICH, and the timing relationship of PHICH with PUSCH determines, described K and m be predefined value, the value of m and k is used in the frame length of transmission frame and transmission frame The quantity of the subframe of PUSCH transmission is relevant.

Data transmission method described in the embodiment of the present invention, Apparatus and system, determine that channel can detect by situation The detection position of CCA；The detection position of described CCA carries out CCA detection；Testing result is non-awarding In the case of power carrier wave is in idle condition, carry out data transmission in described unauthorized carrier wave, wherein, institute State data transmission and include uplink and/or downlink transfer.Technical scheme described according to embodiments of the present invention, The detection position of CCA is no longer the fixed position in transmission frame, can be adjusted according to practical situation, from And the access chance of FBE can be increased, reduce transmission delay.

Accompanying drawing explanation

Figure 1A is LBT based on frame (FBE) mechanism；

Figure 1B is LBT based on load (LBE) mechanism；

Fig. 2 is embodiment of the present invention one data transmission method schematic flow sheet；

Fig. 3 A is the frame structure design schematic diagram of the transmission frame of 1 millisecond；

Fig. 3 B is the frame structure design schematic diagram of another transmission frame of 1 millisecond；

Fig. 4 A is the frame structure design schematic diagram of the transmission frame of 2 milliseconds；

Fig. 4 B is the frame structure design schematic diagram of another transmission frame of 2 milliseconds；

Fig. 5 A is the frame structure design schematic diagram of the transmission frame of 3 milliseconds；

Fig. 5 B is the frame structure design schematic diagram of another transmission frame of 3 milliseconds；

Fig. 6 A is the frame structure design schematic diagram of the transmission frame of 4 milliseconds；

Fig. 6 B is the frame structure design schematic diagram of another transmission frame of 4 milliseconds；

Fig. 7 A is the frame structure design schematic diagram of the transmission frame of 5 milliseconds；

Fig. 7 B is the frame structure design schematic diagram of another transmission frame of 5 milliseconds；

Fig. 8 A is that the CCA of the transmission frame of one 2 milliseconds detects position view；

Fig. 8 B is that the CCA of another transmission frame of 2 milliseconds detects position view；

Fig. 9 A is that the CCA of the transmission frame of 3 milliseconds detects position view；

Fig. 9 B is that the CCA of another transmission frame of 3 milliseconds detects position view；

Figure 10 A is that the CCA of the transmission frame of 4 milliseconds detects position view；

Figure 10 B is that the CCA of another transmission frame of 4 milliseconds detects position view；

Figure 11 A is another schematic diagram of CCA detection position of the transmission frame of 4 milliseconds；

Figure 11 B is another schematic diagram of CCA detection position of another transmission frame of 4 milliseconds；

Figure 12 A is that the CCA of the transmission frame of 5 milliseconds detects position view；

Figure 12 B is that the CCA of another transmission frame of 5 milliseconds detects position view；

Figure 13 A is that the CCA of the transmission frame of 6 milliseconds detects position view；

Figure 13 B is that the CCA of another transmission frame of 6 milliseconds detects position view；

Figure 14 A is another schematic diagram of CCA detection position of the transmission frame of 6 milliseconds；

Figure 14 B is another schematic diagram of CCA detection position of another transmission frame of 6 milliseconds；

Figure 15 A is that the CCA of the transmission frame of 8 milliseconds detects position view；

Figure 15 B is that the CCA of another transmission frame of 8 milliseconds detects position view；

Figure 16 A is another schematic diagram of CCA detection position of the transmission frame of 8 milliseconds；

Figure 16 B is another schematic diagram of CCA detection position of another transmission frame of 8 milliseconds；

Figure 17 A is that the CCA of the transmission frame of 9 milliseconds detects position view；

Figure 17 B is that the CCA of another transmission frame of 9 milliseconds detects position view；

Figure 18 A is that the CCA of the transmission frame of 10 milliseconds detects position view；

Figure 18 B is that the CCA of another transmission frame of 10 milliseconds detects position view；

Figure 19 A is another schematic diagram of CCA detection position of the transmission frame of 10 milliseconds；

Figure 19 B is another schematic diagram of CCA detection position of another transmission frame of 10 milliseconds；

Figure 20 is a schematic diagram of the CCA detection position of different transmission frame length；

Figure 21 A is another schematic diagram of the CCA detection position of different transmission frame length；

Figure 21 B is another schematic diagram of the CCA detection position of different transmission frame length；

Figure 22 A is another schematic diagram of the CCA detection position of different transmission frame length；

Figure 22 B is another schematic diagram of the CCA detection position of different transmission frame length；

Figure 23 A is the frame structure schematic diagram under a different regions control with identical CCA detection position；

Figure 23 B is the frame structure schematic diagram under another different regions control with identical CCA detection position；

Figure 24 is another schematic diagram of the CCA detection position of the transmission frame of 4 milliseconds；

Figure 25 A is a schematic diagram of the determination CCA detection position corresponding to mode 3 of the present invention；

Figure 25 B is another schematic diagram of the determination CCA detection position corresponding to mode 3 of the present invention；

Figure 26 is a schematic diagram of the determination CCA detection position corresponding to specific embodiment 3；

Figure 27 is a schematic diagram of PUSCH transmission corresponding to specific embodiment 43.

Figure 28 is the schematic diagram that specific embodiment the 4 one the second transmission node carries out PUSCH transmission；

Figure 29 is the schematic diagram that another second transmission node of specific embodiment 4 carries out PUSCH transmission；

Figure 30 is the schematic diagram that another second transmission node of specific embodiment 4 carries out PUSCH transmission；

Figure 31 is a schematic diagram carrying out the re-transmission of PUSCH in specific embodiment 4；

Figure 32 is the schematic diagram of another re-transmission carrying out PUSCH in specific embodiment 4；

Figure 33 is the schematic diagram of another re-transmission carrying out PUSCH in specific embodiment 4.

Detailed description of the invention

In order to increase the access chance of FBE, reduce transmission delay, the embodiment of the present invention proposes a kind of data Transmission method, as in figure 2 it is shown, the method includes:

Step 201: determine the detection position of CCA；

Step 202: carry out CCA detection on the detection position of described CCA；

Step 203: testing result is in the case of unauthorized carrier wave is in idle condition, described unauthorized Carrying out data transmission in carrier wave, wherein, the transmission of described data includes uplink and/or downlink transfer.

Transmission frame is uniformly distributed；

In Preset Time constant, or dynamically change in each transmission frame；

At least in last subframe being positioned at transmission frame；

At least in first subframe being positioned at transmission frame.

Wherein, described k determines according to one of following mode:

Described k is predefined value.

The embodiment of the present invention the most correspondingly proposes a kind of data transmission device, and this device includes: detection position Determine module, detection module and data transmission module；Wherein,

Transmission frame is uniformly distributed；

In Preset Time constant, or dynamically change in each transmission frame；

At least in last subframe being positioned at transmission frame；

At least in first subframe being positioned at transmission frame.

In one specific embodiment, when described transmission frame comprise multiple intercept subframe time, except to be positioned at transmission frame last One subframe intercept outside subframe other intercept subframe comprise successively one free time a region and number According to transmission region, the persistent period in region described free time is to carry out the most unauthorized carrier wave during control requires Whether it is in the time needed for idle condition detection, or is N number of transmission symbol duration, wherein N is the integer more than 0.

The embodiment of the present invention the most correspondingly proposes a kind of data transmission system, and this system includes the first transmission joint Point and the second transmission node, the detection position of CCA is true according to the transmission timing relationship of scheduling authorization and correspondence Fixed；Wherein,

Second transmission node, for carrying out CCA detection for the end in subframe #n+k-1, or at son Frame #n+k proceeds by CCA detection, and testing result is in the case of unauthorized carrier wave is in idle condition, Described unauthorized carrier wave carries out data transmission, wherein, described data transmission include uplink and/or under Row transmission,

Wherein, described k determines according to one of following mode:

Described k is predefined value.

For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment Technical scheme is described in detail, it will be appreciated that preferred embodiment described below is only used In the description and interpretation present invention, it is not intended to limit the present invention, in the case of not conflicting, in the application Feature in embodiment and embodiment can mutual combination in any.

Embodiment 1

For the FBE in Europe, Channel holding time is 1 millisecond to 10 milliseconds, and free time is at least channel The 5% of holding time.Concrete Channel holding time can configure.And the frame structure of LTE is with subframe For unit, a subframe continues 1ms, and therefore, Channel holding time is configurable to 1 to 10 LTE Subframe.Consider further that the transmission of LTE in units of OFDM symbol, an OFDM symbol does not comprise to be followed Persistent period during ring prefix (CP:Cyclic Prefix) is 66.7us, under conventional cyclic prefix, comprises The OFDM symbol persistent period of Cyclic Prefix is 71.9us (first symbol of time slot) or 71.3us (other symbols), under extended cyclic prefix, the persistent period of the OFDM symbol comprising Cyclic Prefix is 83.3us.If free time is also in units of OFDM symbol, then time for differently configured channel occupancy Between, its required free time is as shown in table 1:

Table 1

Based on this, for the more typical Channel holding time of ratio, such as 1 millisecond, 2 milliseconds, 3 milliseconds, 4 in the least Second, 5 milliseconds, the several typical transmission frames design as shown in Fig. 3 to Fig. 7 can be obtained, frame here sets Meter refers to intercept the design of subframe and intercept the design of free time in subframe.

What wherein Fig. 3 A～Fig. 7 A represented is intercepts subframe and is positioned at the design transmitting last subframe, Fig. 3 B～ What Fig. 7 B represented is to intercept subframe to be positioned at the design of first subframe of transmission frame.

Embodiment 2

The design of the transmission frame in embodiment 1, is traditional FBE design, namely in a transmission frame only One CCA detects position.As previously mentioned, for traditional FBE design, due to the detection position of CCA Limited, the chance that result in the transmission node unauthorized carrier wave of access compares relatively low, and transfer ratio is relatively big, For this reason, it may be necessary to there is follow-on FBE to design.

Based on this, present embodiments providing the data transmission method of a kind of unauthorized carrier wave, the method includes:

Determining the detection position of CCA, transmission node carries out CCA inspection on the detection position of described CCA Survey, be in the case of described unauthorized carrier wave is in idle condition in testing result, at described unauthorized carrier wave In carry out data transmission, wherein said data transmission include uplink and downlink transfer, described in comprise CCA The subframe of detection is for intercepting subframe.

Wherein it is determined that the detecting position of CCA is set at least one of:

Mode 1: determine the detection position of CCA according to predefined or configuration mode；

Mode 2: determine the detection position of CCA according to the transmission time of transmission frame；

Mode 3: determine the detection position of CCA according to the transmission timing relationship of scheduling authorization and correspondence.

Wherein, for mode 1, the transmission frame of different transmission frame length can be determined to use predefined mode CCA detects position.In view of the FBE under European regulatory, its Channel holding time can be configured to 1 millisecond and arrives 10 milliseconds, and the scheduling of LTE is in units of the subframe of 1 millisecond, therefore, it can design 1 millisecond and arrives The transmission frame of 10 milliseconds.

Specific embodiment 2-1

For the transmission frame of 1 millisecond, give the CCA of the transmission frame of 1 millisecond as shown in Figure 3 A and Figure 3 B Detection position pattern, has a CCA to detect position, lays respectively at the transmission frame of 1 millisecond in a transmission frame End and front end.

Specific embodiment 2-2

For the transmission frame of 2 milliseconds, as Fig. 4 A and Fig. 4 B is respectively shown in giving the transmission frame of 2 milliseconds One pattern of CCA detection position, in this example, has the detecting position of a CCA in a transmission frame Put, lay respectively at end and the front end of the transmission frame of 2 milliseconds.

Access the chance of unauthorized carrier wave in order to increase transmission node, the detection position of CCA can be increased, figure 8A gives another pattern of the CCA detection position of the transmission frame of 2 milliseconds, in this example, one Comprise the detection position of 2 CCA in transmission frame, lay respectively at the end of two subframes, wherein, for passing Defeated frame end intercept subframe, persistent period in region its is 2 OFDM symbol free time, Ye Jiman Foot European regulatory is for the requirement of free time (Channel holding time of 5%), and the sky in first subframe Not busy time zone, it is only necessary to leave enough CCA and detect the time, it is contemplated that LTE transmission at least with OFDM symbol is unit, and here, the free time region of first subframe is 1 OFDM symbol.

Fig. 8 B give the transmission frame of 2 milliseconds CCA detection position another pattern, in this example, One transmission frame comprises the detection position of 2 CCA, lays respectively at the front end of two subframes, and said two is detectd The free time region listening subframe has only to leave enough CCA and detects the time, it is contemplated that LTE passes Transporting to few in units of OFDM symbol, therefore, the free time region intercepting subframe here is 1 OFDM Symbol, further, since second is intercepted last subframe that subframe is also simultaneously transmission frame, thus second Individual intercept subframe except comprise for CCA detection free time region (the first space time region) in addition to, End second subframe also have second free time region, its duration is not less than for meeting control When the free time (in this example corresponding 2 OFDM symbol) required intercepts subframe idle with first Between difference between region (in this example corresponding 1 OFDM symbol), therefore namely 1 OFDM Symbol.

Specific embodiment 2-3:

For the transmission frame of 3 milliseconds, give the CCA of the transmission frame of 3 milliseconds as shown in figs.3 a and 3b One pattern of detection position, in this example, has the detection position of a CCA in a transmission frame, point It is not positioned at end and the front end of the transmission frame of 3 milliseconds.

Access the chance of unauthorized carrier wave in order to increase transmission node, the detection position of CCA can be increased, figure 9A gives another pattern of the CCA detection position of the transmission frame of 3 milliseconds, in this example, one Comprise the detection position of 3 CCA in transmission frame, lay respectively at the end of each subframe, wherein, for passing Defeated frame end intercept subframe, persistent period in region its is 3 OFDM symbol free time, Ye Jiman Foot European regulatory is for the requirement of free time (Channel holding time of 5%), and intercepts son for remaining The free time region of frame, it is only necessary to leave enough CCA and detect the time, it is contemplated that LTE transmission At least in units of OFDM symbol, here, the free time region of remaining subframe is 1 OFDM symbol Number.

Fig. 9 B give the transmission frame of 3 milliseconds CCA detection position another pattern, in this example, One transmission frame comprises the detection position of 3 CCA, lays respectively at the front end of each subframe, detects for described three The free time region listening subframe has only to leave enough CCA and detects the time, it is contemplated that LTE passes Transporting to few in units of OFDM symbol, therefore, the free time region intercepting subframe here is 1 OFDM Symbol, further, since the 3rd is intercepted last subframe that subframe is also simultaneously transmission frame, thus the 3rd Individual intercept subframe except comprise for CCA detection free time region (the first space time region) in addition to, End the 3rd subframe also have second free time region, its duration is not less than for meeting control When the free time (in this example corresponding 3 OFDM symbol) required intercepts subframe idle with first Between difference between region (in this example corresponding 1 OFDM symbol), therefore namely 2 OFDM Symbol.

Specific embodiment 2-4:

For the transmission frame of 4 milliseconds, give the CCA of the transmission frame of 6 milliseconds as shown in Figure 6 A and 6B One pattern of detection position, in this example, has the detection position of a CCA in a transmission frame, point It is not positioned at end and the front end of the transmission frame of 6 milliseconds.

Access the chance of unauthorized carrier wave in order to increase transmission node, the detection position of CCA can be increased, figure 10A gives another pattern of the CCA detection position of the transmission frame of 4 milliseconds, in this example, one Comprise the detection position of 2 CCA in transmission frame, lay respectively at the end of subframe #1 and subframe #3, wherein, Intercepting subframe for transmission frame end (namely subframe #3), persistent period in region its is free time 3 OFDM symbol, namely meet European regulatory wanting for free time (Channel holding time of 5%) Ask, and the free time region of subframe (namely subframe #1) is intercepted for remaining, it is only necessary to leave foot Enough CCA detect the time, it is contemplated that LTE transmission is at least in units of OFDM symbol, here, The free time region of remaining subframe is 1 OFDM symbol.

Figure 10 B gives another pattern of the CCA detection position of the transmission frame of 4 milliseconds, in this example In, a transmission frame comprises the detection position of 2 CCA, lays respectively at subframe #0 and subframe #2, intercepts The free time region of subframe has only to leave enough CCA and detects the time, it is contemplated that LTE transmission At least in units of OFDM symbol, therefore, the free time region intercepting subframe here is 1 OFDM Symbol；It addition, last subframe of transmission frame, namely the time of the free time regional sustained of subframe #3 Not less than being the free time (in this example corresponding 3 OFDM symbol) meeting control requirement and first Intercept the difference between the free time region (corresponding 1 OFDM symbol in this example) of subframe, therefore Namely 2 OFDM symbol.The chance of unauthorized carrier wave is accessed in order to increase transmission node further, permissible Increasing the detection position of CCA further, Figure 11 gives the CCA detection position of the transmission frame of 4 milliseconds Another pattern, in this example, comprises 4 CCA and detects position, lay respectively at every in a transmission frame The end of individual subframe, intercepts subframe for transmission frame end (namely subframe #3), its free time district The persistent period in territory is 3 OFDM symbol, namely meets European regulatory for the free time (letter of 5% Road holding time) requirement, and the free time region of subframe is intercepted for remaining, it is only necessary to leave foot Enough CCA detect the time, it is contemplated that LTE transmission is at least in units of OFDM symbol, here, The free time region of remaining subframe is 1 OFDM symbol.

Figure 11 B gives another pattern of the CCA detection position of the transmission frame of 4 milliseconds, in this example In, a transmission frame comprises the detection position of 4 CCA, lays respectively at the front end of each subframe, and described 4 The individual free time region intercepting subframe has only to leave enough CCA and detects the time, it is contemplated that LTE Transmission is at least in units of OFDM symbol, and therefore, the free time region intercepting subframe here is 1 OFDM symbol, further, since the 4th is intercepted last subframe that subframe is also transmission frame simultaneously, because of And the 4th is intercepted subframe except comprising (the first space time district, free time region for CCA detection Territory) outward, the end the 5th subframe also have second free time region, its duration is not less than being The free time (corresponding 3 OFDM symbol in this example) meeting control requirement intercepts subframe with first Free time region (in this example corresponding 1 OFDM symbol) between difference, therefore namely 2 OFDM symbol.

Specific embodiment 2-5

For the transmission frame of 5 milliseconds, give the CCA of the transmission frame of 5 milliseconds as shown in figs. 7 a-b One pattern of detection position, in this example, has the detection position of a CCA in a transmission frame, point It is not positioned at end and the front end of the transmission frame of 5 milliseconds.

Access the chance of unauthorized carrier wave in order to increase transmission node, the detection position of CCA can be increased, figure Another pattern of the CCA detection position of 12 transmission frames giving 5 milliseconds, in this example, one Comprise 5 CCA in transmission frame and detect position, lay respectively at the end of each subframe, for transmission frame end (namely subframe #4) intercept subframe, persistent period in region its is 4 OFDM symbol free time, Namely meet the European regulatory requirement for free time (Channel holding time of 5%), and for remaining Intercept the free time region of subframe, it is only necessary to leave enough CCA and detect the time, it is contemplated that LTE Transmission is at least in units of OFDM symbol, and here, the free time region of remaining subframe is 1 OFDM Symbol.

Figure 12 B gives another pattern of the CCA detection position of the transmission frame of 5 milliseconds, in this example In, a transmission frame comprises the detection position of 5 CCA, lays respectively at the front end of each subframe, and described 5 The individual free time region intercepting subframe has only to leave enough CCA and detects the time, it is contemplated that LTE Transmission is at least in units of OFDM symbol, and therefore, the free time region intercepting subframe here is 1 OFDM symbol, further, since the 5th is intercepted last subframe that subframe is also transmission frame simultaneously, because of And the 5th is intercepted subframe except comprising (the first space time district, free time region for CCA detection Territory) outward, the end the 5th subframe also have second free time region, its duration is not less than being The free time (corresponding 4 OFDM symbol in this example) meeting control requirement intercepts subframe with first Free time region (in this example corresponding 1 OFDM symbol) between difference, therefore namely 3 OFDM symbol.

Specific embodiment 2-6

For the transmission frame of 6 milliseconds, give the CCA detection of the transmission frame of 6 milliseconds as shown in FIG. 13A One pattern of position, in this example, comprises the detection position of 2 CCA in a transmission frame, respectively It is positioned at the end of subframe #2 and subframe #5, wherein, transmission frame end (namely subframe #5) is intercepted Subframe, persistent period in region its is 5 OFDM symbol free time, namely meet European regulatory for The requirement of free time (Channel holding time of 5%), and subframe (namely subframe is intercepted for remaining Free time region #2), it is only necessary to leave enough CCA and detect the time, it is contemplated that LTE passes Transporting to few in units of OFDM symbol, here, the free time region of remaining subframe is 1 OFDM Symbol.

Figure 13 B gives another pattern of the CCA detection position of the transmission frame of 6 milliseconds, in this example In, a transmission frame comprises the detection position of 2 CCA, lays respectively at subframe #0 and subframe #3, intercepts The free time region of subframe has only to leave enough CCA and detects the time, it is contemplated that LTE transmission At least in units of OFDM symbol, therefore, the free time region intercepting subframe here is 1 OFDM Symbol；It addition, last subframe of transmission frame, namely the time of the free time regional sustained of subframe #5 Not less than being the free time (in this example corresponding 5 OFDM symbol) meeting control requirement and first Intercept the difference between the free time region (corresponding 1 OFDM symbol in this example) of subframe, therefore Namely 4 OFDM symbol.

Access the chance of unauthorized carrier wave in order to increase transmission node further, can increase CCA's further Detection position, Figure 14 A gives another pattern of the CCA detection position of the transmission frame of 6 milliseconds, In this example, comprise 3 CCA in a transmission frame and detect position, lay respectively at subframe #1, subframe #3 With the end of subframe #5, wherein, intercepting subframe for transmission frame end (namely subframe #5), it is empty The persistent period of not busy time zone is 5 OFDM symbol, namely meets European regulatory for free time The requirement of (Channel holding time of 5%), and subframe (namely subframe #1 and subframe is intercepted for remaining Free time region #3), it is only necessary to leave enough CCA and detect the time, it is contemplated that LTE passes Transporting to few in units of OFDM symbol, here, the free time region of remaining subframe is 1 OFDM Symbol.

Figure 13 B gives another pattern of the CCA detection position of the transmission frame of 6 milliseconds, in this example In, a transmission frame comprises the detection position of 3 CCA, lays respectively at subframe #0, subframe #2 and subframe #4, the free time region intercepting subframe has only to leave the enough CCA detection time, it is contemplated that LTE transmission is at least in units of OFDM symbol, and therefore, the free time region intercepting subframe here is 1 Individual OFDM symbol；It addition, last subframe of transmission frame, namely the free time region of subframe #5 Duration is not less than being the free time (corresponding 5 OFDM symbol in this example) meeting control requirement The difference between the free time region (corresponding 1 OFDM symbol in this example) of subframe is intercepted with first Value, therefore namely 4 OFDM symbol.

Further, it is also possible to the detecting position of predefined CCA is setting in the end of each subframe, for transmission frame end End (namely subframe #5) intercept subframe, persistent period in region its is 5 OFDM symbols free time Number, namely meet the European regulatory requirement for free time (Channel holding time of 5%), and for it The remaining free time region intercepting subframe, it is only necessary to leave enough CCA and detect the time, it is contemplated that LTE transmission is at least in units of OFDM symbol, and here, the free time region of remaining subframe is 1 OFDM symbol.

Or, the detecting position of predefined CCA is setting in the front end of each subframe, each free time intercepting subframe Time zone has only to leave enough CCA and detects the time, it is contemplated that LTE transmission is at least with OFDM Symbol is unit, and therefore, the free time region intercepting subframe here is 1 OFDM symbol, it addition, Owing to the 6th is intercepted last subframe that subframe is also transmission frame simultaneously, thus the 6th is intercepted subframe and removes Comprise for the free time region (the first space time region) of CCA detection outward, the 6th subframe End also have second free time region, its duration is not less than during for meeting control requirement idle Between (in this example corresponding 5 OFDM symbol) (this shows in region with first free time intercepting subframe Corresponding 1 OFDM symbol in example) between difference, therefore namely 4 OFDM symbol.

Specific embodiment 2-7

For the transmission frame of 8 milliseconds, give the CCA detection of the transmission frame of 8 milliseconds as shown in fig. 15 One pattern of position, in this example, comprises the detection position of 2 CCA in a transmission frame, respectively It is positioned at the end of subframe #3 and subframe #7, wherein, transmission frame end (namely subframe #7) is intercepted Subframe, persistent period in region its is 6 OFDM symbol free time, namely meet European regulatory for The requirement of free time (Channel holding time of 5%), and subframe (namely subframe is intercepted for remaining Free time region #3), it is only necessary to leave enough CCA and detect the time, it is contemplated that LTE passes Transporting to few in units of OFDM symbol, here, the free time region of remaining subframe is 1 OFDM Symbol.

Figure 15 B gives another pattern of the CCA detection position of the transmission frame of 8 milliseconds, in this example In, a transmission frame comprises the detection position of 2 CCA, lays respectively at subframe #0 and subframe #3, intercepts The free time region of subframe has only to leave enough CCA and detects the time, it is contemplated that LTE transmission At least in units of OFDM symbol, therefore, the free time region intercepting subframe here is 1 OFDM Symbol；It addition, last subframe of transmission frame, namely the time of the free time regional sustained of subframe #7 Not less than being the free time (in this example corresponding 6 OFDM symbol) meeting control requirement and first Intercept the difference between the free time region (corresponding 1 OFDM symbol in this example) of subframe, therefore Namely 5 OFDM symbol.

Access the chance of unauthorized carrier wave in order to increase transmission node further, can increase CCA's further Detection position, Figure 16 A gives another pattern of the CCA detection position of the transmission frame of 8 milliseconds, In this example, comprise 4 CCA in a transmission frame and detect positions, lay respectively at subframe #1, subframe #3, Subframe #5 and the end of subframe #7, wherein, intercept subframe for transmission frame end (namely subframe #7), Persistent period in region its is 6 OFDM symbol free time, namely when meeting European regulatory for the free time Between the requirement of (Channel holding time of 5%), and the free time region of subframe is intercepted for remaining, only Need to leave enough CCA and detect the time, it is contemplated that LTE transmission is at least with OFDM symbol as list Position, here, the free time region of remaining subframe is 1 OFDM symbol.

Figure 16 B gives another pattern of the CCA detection position of the transmission frame of 8 milliseconds, in this example In, a transmission frame comprises the detection position of 4 CCA, lays respectively at subframe #0, subframe #2, subframe #4 With subframe #6, the free time region intercepting subframe has only to leave the enough CCA detection time, examines Consider to LTE transmission at least in units of OFDM symbol, therefore, intercept the free time district of subframe here Territory is 1 OFDM symbol；It addition, last subframe of transmission frame, namely during subframe #7 idle Between time of regional sustained not less than for meeting free time that control requires (in this example corresponding 6 OFDM symbol) free time region (corresponding 1 OFDM symbol in this example of subframe is intercepted with first Number) between difference, therefore namely 5 OFDM symbol.

Further, it is also possible to the detecting position of predefined CCA is setting in the end of each subframe, for transmission frame end End (namely subframe #7) intercept subframe, persistent period in region its is 6 OFDM symbols free time Number, namely meet the European regulatory requirement for free time (Channel holding time of 5%), and for it The remaining free time region intercepting subframe, it is only necessary to leave enough CCA and detect the time, it is contemplated that LTE transmission is at least in units of OFDM symbol, and here, the free time region of remaining subframe is 1 OFDM symbol.

Or, the detecting position of predefined CCA is setting in the front end of each subframe, each free time intercepting subframe Time zone has only to leave enough CCA and detects the time, it is contemplated that LTE transmission is at least with OFDM Symbol is unit, and therefore, the free time region intercepting subframe here is 1 OFDM symbol, it addition, Owing to the 8th is intercepted last subframe that subframe is also transmission frame simultaneously, thus the 8th is intercepted subframe and removes Comprise for the free time region (the first space time region) of CCA detection outward, the 8th subframe End also have second free time region, its duration is not less than during for meeting control requirement idle Between (in this example corresponding 6 OFDM symbol) (this shows in region with first free time intercepting subframe Corresponding 1 OFDM symbol in example) between difference, therefore namely 5 OFDM symbol.

Specific embodiment 2-8

For the transmission frame of 9 milliseconds, give the CCA detection of the transmission frame of 9 milliseconds as shown in Figure 17 A One pattern of position, in this example, comprises the detection position of 3 CCA in a transmission frame, respectively It is positioned at the end of subframe #2, subframe #5 and subframe #8, wherein, for transmission frame end (namely subframe #8) Intercept subframe, persistent period in region its is 7 OFDM symbol free time, namely meets Europe pipe Make the requirement for free time (Channel holding time of 5%), and subframe is intercepted (the most just for remaining Subframe #2 and subframe #5) free time region, it is only necessary to leave enough CCA and detect the time, In view of LTE transmission at least in units of OFDM symbol, here, the free time region of remaining subframe It it is 1 OFDM symbol.

Figure 17 B gives another pattern of the CCA detection position of the transmission frame of 9 milliseconds, in this example In, a transmission frame comprises the detection position of 3 CCA, lays respectively at subframe #0, subframe #3 and subframe #6, the free time region intercepting subframe has only to leave the enough CCA detection time, it is contemplated that LTE transmission is at least in units of OFDM symbol, and therefore, the free time region intercepting subframe here is 1 Individual OFDM symbol；It addition, last subframe of transmission frame, namely the free time region of subframe #8 Duration is not less than being the free time (corresponding 7 OFDM symbol in this example) meeting control requirement The difference between the free time region (corresponding 1 OFDM symbol in this example) of subframe is intercepted with first Value, therefore namely 6 OFDM symbol.Further, it is also possible to the detecting position of predefined CCA is setting in often The end of individual subframe, intercepts subframe for transmission frame end (namely subframe #8), its free time district The persistent period in territory is 7 OFDM symbol, namely meets European regulatory for the free time (letter of 5% Road holding time) requirement, and the free time region of subframe is intercepted for remaining, it is only necessary to leave foot Enough CCA detect the time, it is contemplated that LTE transmission is at least in units of OFDM symbol, here, The free time region of remaining subframe is 1 OFDM symbol.

Or, the detecting position of predefined CCA is setting in the front end of each subframe, each free time intercepting subframe Time zone has only to leave enough CCA and detects the time, it is contemplated that LTE transmission is at least with OFDM Symbol is unit, and therefore, the free time region intercepting subframe here is 1 OFDM symbol, it addition, Owing to the 9th is intercepted last subframe that subframe is also transmission frame simultaneously, thus the 9th is intercepted subframe and removes Comprise for the free time region (the first space time region) of CCA detection outward, the 9th subframe End also have second free time region, its duration is not less than during for meeting control requirement idle Between (in this example corresponding 7 OFDM symbol) (this shows in region with first free time intercepting subframe Corresponding 1 OFDM symbol in example) between difference, therefore namely 6 OFDM symbol.

Specific embodiment 2-9

For the transmission frame of 10 milliseconds, give the CCA inspection of the transmission frame of 10 milliseconds as shown in Figure 18 A The pattern that location is put, in this example, comprises the detection position of 2 CCA in a transmission frame, point It is not positioned at the end of subframe #4 and subframe #8, wherein, transmission frame end (namely subframe #9) is detectd Listening subframe, persistent period in region its is 7 OFDM symbol free time, namely meets European regulatory pair In the requirement of free time (Channel holding time of 5%), and subframe (namely son is intercepted for remaining Frame #4) free time region, it is only necessary to leave enough CCA and detect the time, it is contemplated that LTE Transmission is at least in units of OFDM symbol, and here, the free time region of remaining subframe is 1 OFDM Symbol.

Figure 18 B gives another pattern of the CCA detection position of the transmission frame of 10 milliseconds, in this example In, a transmission frame comprises the detection position of 2 CCA, lays respectively at subframe #0 and subframe #5, intercepts The free time region of subframe has only to leave enough CCA and detects the time, it is contemplated that LTE transmission At least in units of OFDM symbol, therefore, the free time region intercepting subframe here is 1 OFDM Symbol；It addition, last subframe of transmission frame, namely subframe #, the time of the free time regional sustained of 9 Not less than being the free time (in this example corresponding 7 OFDM symbol) meeting control requirement and first Intercept the difference between the free time region (corresponding 1 OFDM symbol in this example) of subframe, therefore Namely 6 OFDM symbol.

Access the chance of unauthorized carrier wave in order to increase transmission node further, can increase CCA's further Detection position, Figure 19 gives another pattern of the CCA detection position of the transmission frame of 10 milliseconds, at this In example, comprise 5 CCA in a transmission frame and detect position, lay respectively at subframe #1, subframe #3, son The end of frame #5, subframe #7 and subframe #9, wherein, detects for transmission frame end (namely subframe #9) Listening subframe, persistent period in region its is 7 OFDM symbol free time, namely meets European regulatory pair In the requirement of free time (Channel holding time of 5%), and free time of subframe is intercepted for remaining Region, it is only necessary to leave enough CCA and detect the time, it is contemplated that LTE transmission is at least with OFDM Symbol is unit, and here, the free time region of remaining subframe is 1 OFDM symbol.

Figure 19 B gives another pattern of the CCA detection position of the transmission frame of 10 milliseconds, in this example In, a transmission frame comprises the detection position of 5 CCA, lay respectively at subframe #0, subframe #2, subframe #4, Subframe #6 and subframe #8, the free time region intercepting subframe has only to leave the enough CCA detection time , it is contemplated that LTE transmission is at least in units of OFDM symbol, therefore, intercepts the sky of subframe here Not busy time zone is 1 OFDM symbol；It addition, last subframe of transmission frame, namely subframe #9 Time of free time regional sustained (in this example corresponding not less than for meeting free time that control requires 7 OFDM symbol) free time region (corresponding 1 OFDM in this example of subframe is intercepted with first Symbol) between difference, therefore namely 6 OFDM symbol.

Further, it is also possible to the detecting position of predefined CCA is setting in the end of each subframe, for transmission frame end End (namely subframe #9) intercept subframe, persistent period in region its is 7 OFDM symbols free time Number, namely meet the European regulatory requirement for free time (Channel holding time of 5%), and for it The remaining free time region intercepting subframe, it is only necessary to leave enough CCA and detect the time, it is contemplated that LTE transmission is at least in units of OFDM symbol, and here, the free time region of remaining subframe is 1 OFDM symbol.

Or, the detecting position of predefined CCA is setting in the front end of each subframe, each free time intercepting subframe Time zone has only to leave enough CCA and detects the time, it is contemplated that LTE transmission is at least with OFDM Symbol is unit, and therefore, the free time region intercepting subframe here is 1 OFDM symbol, it addition, Owing to the 10th is intercepted last subframe that subframe is also transmission frame simultaneously, thus the 10th is intercepted subframe In addition to comprising for the free time region (the first space time region) of CCA detection, at the 10th The end of subframe also have second free time region, its duration is not less than being to meet the sky of control requirement Between idle, (corresponding 7 OFDM symbol in this example) (should with first free time region intercepting subframe Corresponding 1 OFDM symbol in example) between difference, therefore namely 6 OFDM symbol.

For mode 1, for each transmission frame length, one or more CCA predefined detect the pattern of position, In the middle of actually used, can determine by the way of configuring that transmission node which CCA specifically used detects position Pattern, or determine which CCA detection position pattern of use by adaptive mode, as compared when network (repeatedly cannot access unauthorized carrier wave) when of blocking up, use the pattern that CCA detection location comparison is many.

In addition, it is necessary to note time, when a transmission frame exist multiple CCA detect position time, in transmission frame Actual time of carrying out data transmission be that free time region to this transmission frame is after CCA detection Only, the most as shown in figure 20:

When CCA detection is carried out in the clear area of the end of previous transmission frame and CCA testing result is letter During the road free time, transmission node Channel holding time in this transmission frame is T1=9.5 millisecond

When CCA detection is carried out in the clear area of the end of previous transmission frame and CCA testing result is letter Road busy, then the end of subframe #4 at this transmission frame is carried out CCA detection by transmission node, if CCA When testing result is channel idle, transmission node Channel holding time in this transmission frame is T2=4.5 milli Second.

Embodiment 3

For mode 2, determine the detection position of CCA, specifically, root according to the transmission time of transmission frame According to the multiple transmission frame length supported in system, with the transmission frame corresponding to the greatest common divisor of different transmission frame lengths Based on length, determine the CCA position of other transmission frame lengths.

As illustrated in fig. 21, if the transmission frame length of system support is 2 milliseconds, 4 milliseconds, 6 milliseconds, 8 millis Second, 10 milliseconds, owing to these different length transmission frame lengths have greatest common divisor 2, therefore, with 2 millis Based on the transmission frame length of second, determine the CCA position of other transmission frame lengths, wherein said CCA position Being positioned at the end intercepting subframe, as can be seen from Figure 21A, the CCA position of the transmission frame of different length is Alignment, this ensure that the transmission node using different transmission frame lengths, have identical be linked into unauthorized The chance of carrier wave.Or as illustrated in fig. 21b, the position of wherein said CCA is positioned at the front end intercepting subframe, As can be seen from Figure 21B, the CCA position of the transmission frame of different length is alignment, this ensure that and makes With the transmission node of different transmission frame lengths, there is the identical chance being linked into unauthorized carrier wave.

In like manner, as shown in fig. 22, if the transmission frame length of system support is 3 milliseconds, 6 milliseconds, 9 millis Second, owing to these different length transmission frame lengths have greatest common divisor 3, therefore, with the transmission of 3 milliseconds Based on frame length, determining the CCA position of other transmission frame lengths, wherein said CCA position is positioned at intercepts The end of subframe, as can be seen from Figure 22A, the CCA position of the transmission frame of different length is alignment, This ensure that the transmission node using different transmission frame lengths, there is the identical machine being linked into unauthorized carrier wave Meeting.Or as shown in Figure 22 B, the position of wherein said CCA is positioned at the front end intercepting subframe, from Figure 22 B It can be seen that the CCA position of the transmission frame of different length is also alignment, this ensure that and use not simultaneous interpretation The transmission node of defeated frame length, has the identical chance being linked into unauthorized carrier wave.

In like manner, as shown in fig. 23 a, if the transmission frame length of system support is 5 milliseconds, 10 milliseconds, due to The two transmission frame length has greatest common divisor 5, therefore, based on the transmission frame length of 5 milliseconds, determines The CCA position of other transmission frame lengths, wherein said CCA position is positioned at the end intercepting subframe, from figure 23A, it can be seen that the CCA position of transmission frame of different length is alignment, this ensure that use difference The transmission node of transmission frame length, has the identical chance being linked into unauthorized carrier wave.Or such as Figure 23 B institute Showing, the position of wherein said CCA is positioned at the front end intercepting subframe, as can be seen from Figure 23B, different long The CCA position of the transmission frame of degree is also alignment, this ensure that the transmission joint using different transmission frame length Point, has the identical chance being linked into unauthorized carrier wave.

It is a radio frames in view of LTE with 10 milliseconds, one field of 5 milliseconds of correspondences, therefore, work as LTE When system is applied on unauthorized carrier wave, transmission frame length is 5 milliseconds and 10 milliseconds and is one and more reasonably selects Select.Furthermore, it is contemplated that control requirement elsewhere, such as Japan Area, it limits the maximum being to transmit Duration not can exceed that 4 milliseconds, for this, if to detect position with European regulatory has identical CCA, Then can be considered as catching up with and state 5 milliseconds of identical CCA detection position patterns, as shown in figure 24, different Place be that last subframe must be all idle, could meet the control requirement of Japan: transmit duration Maximum less than 4 milliseconds.

It addition, for the control requirement of Japan, it would however also be possible to employ the CCA of above-mentioned 4 milliseconds detects the location drawing Sample, different places is, clear area has only to leave enough CCA and detects the time, it is contemplated that LTE transmission is at least in units of OFDM symbol, and here, the free time region of remaining subframe is 1 OFDM symbol, shown in as shown in Figure 25 A or Figure 25 B, the detection position of CCA lays respectively at intercepts son The end of frame or front end.

It should be noted that the detection position of CCA is constant within a certain period of time, or in each biography Defeated frame dynamically changes.

Embodiment 4

Employing mode 3, determines the detection position of CCA according to the transmission timing relationship of scheduling authorization and correspondence.

First transmission node sends scheduling authorization in subframe #n to the second transmission node, and the second transmission node is at son The end of frame #n+k-1 carries out CCA detection, or carries out CCA inspection on first symbol of subframe #n+k Survey.

Further, described first transmission node is authorizing on carrier wave or unauthorized carrier wave to the second transmission node Send scheduling authorization.

Further, the carrier wave of described transmission scheduling authorization is FDD carrier wave or is TDD carrier wave；

Further, described second transmission node carries out data transmission the carrier wave at place is FDD or for TDD Carrier wave, wherein, described data are transmitted as PUSCH transmission；

Further, described k determines according to one of following mode:

(1) timing relationship that the scheduling authorization that described k is supported according to existing LTE system transmits with data Determining, wherein, described data are transmitted as the transmission of Physical Uplink Shared Channel (PUSCH)；

(2) described k is predefined value.

Wherein, the timing relationship that the scheduling authorization of existing LTE system defined and data are transmitted includes:

When the second transmission node is configured to self scheduling, FDD's and TDD of existing LTE system defined The timing relationship that scheduling authorization transmits with data；

When the second transmission node is configured to across carrier dispatching, the FDD carrier wave of existing LTE system defined Polymerization, the carrier aggregation of the identical uplink-downlink configuration of TDD, the carrier aggregation of TDD difference uplink-downlink configuration, And the timing relationship that the scheduling authorization of TDD and FDD polymerization transmits with data.

The scheduling authorization of described existing LTE system defined is prior art with the timing relationship of data transmission, It is described again here.

Further, when described second transmission node carries out CCA detection at the end of subframe #n+k-1, When described second transmission node carries out PUSCH transmission, delete the last of last PUSCH transmission subframe At least one symbol；

Further, when described second transmission node subframe #n+k proceed by CCA detection time, institute State the second transmission node when carrying out PUSCH transmission, delete before first PUSCH transmission subframe at least One symbol.

Further, when described CCA testing result is channel idle, described second transmission node is according to institute State scheduling authorization, described subframe #n+k carries out data transmission (namely PUSCH transmission), or in institute State subframe #n+k and Z subframe of continuous print enterprising row data transmission thereafter；

Further, when described CCA testing result is channel busy, described second transmission node is in subframe The end of #n+k+p+q-1 re-starts CCA detection, or on first symbol of subframe #n+k+p+q Carry out CCA detection, or re-start CCA detection at the end of subframe #n+k+m-1, or at son Carrying out CCA detection on first symbol of frame #n+k+m, wherein, wherein said p and q is according to existing The PUSCH that LTE system specifies and physical hybrid automatic repeat request indicator channel (i.e. PHICH), and The timing relationship of PHICH with PUSCH determines, m is predefined value.

In order to preferably illustrate the present invention program, it is explained the most in conjunction with specific embodiments.

Specific embodiment 4-1

Figure 26 be given the second transmission node determine CCA detection position a schematic diagram, in this embodiment, Assume that the first transmission node (eNB) is sent out to the second transmission node (UE1 or UE2) on unauthorized carrier wave Send scheduling authorization, and described unauthorized carrier wave is TDD carrier wave；Assume the second transmission node (UE1 simultaneously Or UE2) carry out CCA detection at the end of subframe #n+k-1, specific in embodiment as shown in figure 26, First transmission node eNB sends scheduling authorization to UE1 in subframe #8 of the transmission frame #x of unauthorized carrier wave, Then the second transmission node UE1 is according to the timing relationship of existing LTE TDD system, by transmission frame #x+1's Sending PUSCH in subframe #2, k is 4 here, at UE1 before sending PUSCH, at transmission frame #x+1 The end (namely subframe #n+k-1) of subframe #1 carry out CCA detection；

In like manner, for the second transmission node UE2, the first transmission node eNB is at the transmission frame of unauthorized carrier wave Send scheduling authorization to UE1 in subframe #9 of #x, then UE2 is according to the timing of existing LTE TDD system Relation, will send PUSCH in subframe #3 of transmission frame #x+1, and k is 4 here, is sending at UE2 Before PUSCH, the end (namely subframe #n+k-1) in subframe #2 of transmission frame #x carries out CCA inspection Survey；

In this embodiment, during in order to ensure that UE2 carries out CCA detection, do not passed by the PUSCH of UE1 Defeated impact, PUSCH transmission to delete last symbol and not carry out data transmission.

It should be noted that as an embodiment, k is according to TDD carrier wave self scheduling in the present embodiment Time the timing relationship of scheduling authorization and PUSCH transmission determine.

Specific embodiment 4-2

Figure 27 be given the second transmission node determine CCA detection position a schematic diagram, in this embodiment, Assume that the first transmission node (eNB) is sent out to the second transmission node (UE1 or UE2) on unauthorized carrier wave Send scheduling authorization, and described unauthorized carrier wave is TDD carrier wave；Assume the second transmission node (UE1 simultaneously Or UE2) on first symbol of subframe #n+k, carry out CCA detection, specific to reality as shown in figure 27 Executing in example, eNB sends scheduling authorization to UE1 in subframe #8 of the transmission frame #x of unauthorized carrier wave, then UE1, according to the timing relationship of existing LTE TDD system, will send in subframe #2 of transmission frame #x+1 PUSCH, k is 4 here, is sending before PUSCH at UE1, transmission frame #x+1 subframe #2 (also Be exactly subframe #n+k) first symbol on carry out CCA detection；

In like manner, UE2, eNB are sent to UE1 in subframe #9 of the transmission frame #x of unauthorized carrier wave Scheduling authorization, then UE2 is according to the timing relationship of existing LTE TDD system, by the son at transmission frame #x+1 Sending PUSCH on frame #3, k is 4 here, at UE2 before sending PUSCH, at transmission frame #x+1 Subframe #3 (namely subframe #n+k) first symbol on carry out CCA detection；

In order to avoid the process to imperfect symbol, CCA detection can be in the subframe of PUSCH to be sent The end of first symbol is carried out, and is so only used as a preferable embodiment, and CCA detects at first symbol Number other positions, the present invention is not precluded from.

Specific embodiment 4-3

Figure 28 gives the example that above-mentioned second transmission node carries out PUSCH transmission.In this embodiment In, it is assumed that the first transmission node (eNB) on unauthorized carrier wave to the second transmission node (UE1 or UE2) Send scheduling authorization, and described unauthorized carrier wave is TDD carrier wave；Assume the second transmission node (UE1 simultaneously Or UE2) on first symbol of subframe #n+k, carry out CCA detection, specific to reality as shown in figure 28 Executing in example, eNB sends scheduling authorization to UE1 in subframe #8 of the transmission frame #x of unauthorized carrier wave, then UE1, according to the timing relationship of existing LTE TDD system, will send in subframe #2 of transmission frame #x+1 PUSCH, k is 4 here, is sending before PUSCH at UE1, transmission frame #x+1 subframe #2 (also Be exactly subframe #n+k) first symbol on carry out CCA detection.The testing result of CCA is channel busy, Then according to timing relationship (p=6 here) and PHICH and PUSCH of existing PUSCH Yu PHICH Timing relationship (q=4 here), UE1 will carry out PUSCH re-transmission in subframe #2 of transmission frame #x+2, Before PUSCH retransmits, UE1 is by subframe #2 (namely subframe #n+k+p+q) at transmission frame #x+2 First symbol on carry out CCA detection.It practice, subframe #2 of transmission frame #x+2 is transmission frame #x+1 Subframe #2 on send PUSCH retransmit subframe.If CCA testing result remains as busy, then repeat Said process, retransmits at the next one and carries out CCA detection in subframe, and testing result is then to send in the spare time, for hurrying then Repeat, until arrive maximum retransmission position, it is assumed that be configured with PUSCH maximum retransmission (as It is 4).

And to UE2, scheduling is sent in subframe #9 of the transmission frame #x of unauthorized carrier wave for UE2, eNB Authorize, then UE2 is according to the timing relationship of existing LTE TDD system, by subframe #3 at transmission frame #x+1 Upper transmission PUSCH, k is 4 here, at UE2 before sending PUSCH, at the son of transmission frame #x+1 CCA detection is carried out on first symbol of frame #3 (namely subframe #n+k).The testing result of CCA is Channel is not busy, and therefore UE2 sends PUSCH after completing CCA detection.

Specific embodiment 4-3

Figure 28 gives the example that above-mentioned second transmission node carries out PUSCH transmission.In this embodiment In, it is assumed that the first transmission node (eNB) on unauthorized carrier wave to the second transmission node (UE1 or UE2) Send scheduling authorization, and described unauthorized carrier wave is TDD carrier wave；Assume the second transmission node (UE1 simultaneously Or UE2) on first symbol of subframe #n+k, carry out CCA detection, specific to reality as shown in figure 28 Executing in example, eNB sends scheduling authorization to UE1 in subframe #8 of the transmission frame #x of unauthorized carrier wave, then UE1, according to the timing relationship of existing LTE TDD system, will send in subframe #2 of transmission frame #x+1 PUSCH, k is 4 here, is sending before PUSCH at UE1, transmission frame #x+1 subframe #2 (also Be exactly subframe #n+k) first symbol on carry out CCA detection.The testing result of CCA is channel busy, Then according to timing relationship (p=6 here) and PHICH and PUSCH of existing PUSCH Yu PHICH Timing relationship (q=4 here), UE1 will carry out PUSCH re-transmission in subframe #2 of transmission frame #x+2, Before PUSCH retransmits, UE1 by transmission frame #x+2 subframe #2 (namely subframe #n+k+p+q, Be referred to as first retransmit subframe) first symbol on carry out CCA detection.It practice, transmission frame #x+2 Subframe #2 that subframe #2 is transmission frame #x+1 on send PUSCH retransmit subframe.If CCA examines Survey result and remain as busy, then repeat said process, retransmit at the next one and carry out CCA detection in subframe, detection Result is then to send in the spare time, then repeats for busy, until arriving maximum retransmission, as being configured with PUSCH Maximum retransmission be 4, if then CCA be detected as continuous 4 times busy after, then UE1 abandons this PUSCH Send.

Specific embodiment 4-4

Figure 29 gives the example that above-mentioned second transmission node carries out PUSCH transmission.In this embodiment In, it is assumed that the first transmission node (eNB) on unauthorized carrier wave to the second transmission node (UE1 or UE2) Send scheduling authorization, and described unauthorized carrier wave is TDD carrier wave；Assume the second transmission node (UE1 simultaneously Or UE2) on first symbol of subframe #n+k, carry out CCA detection, specific to reality as shown in figure 29 Executing in example, eNB sends scheduling authorization to UE1 in subframe #8 of the transmission frame #x of unauthorized carrier wave, then UE1, according to the timing relationship of existing LTE TDD system, will send in subframe #2 of transmission frame #x+1 PUSCH, k is 4 here, is sending before PUSCH at UE1, transmission frame #x+1 subframe #2 (also Be exactly subframe #n+k) first symbol on carry out CCA detection.The testing result of CCA is channel busy, Then carrying out PUSCH transmission in subframe n+k+m according to UE1, wherein m is predefined value, at this In, it is assumed that m=10, then UE1 is by subframe #2 (namely subframe #n+k+m) at transmission frame #x+2 First symbol on carry out CCA detection.If CCA testing result remains as busy, then repeat above-mentioned mistake Journey, retransmits at the next one and carries out CCA detection in subframe, and testing result is then to send in the spare time, then repeats for busy, Until arriving maximum retransmission, it is 4 as being configured with the maximum retransmission of PUSCH, if then After CCA is detected as continuous 4 times hurrying, then UE1 abandons this PUSCH transmission.

Here the value of m is with the number of subframe for PUSCH transmission in the frame length of transmission frame and transmission frame Measure relevant.

Specific embodiment 4-5:

What above example was given is that a scheduling authorization only triggers one subframe of the second transmission node The example of PUSCH transmission, what the present embodiment was given is that a scheduling authorization triggers the second many height of transmission node The PUSCH transmission of frame.As shown in figure 30, it is assumed that the first transmission node (eNB) is on unauthorized carrier wave Send scheduling authorization to the second transmission node (UE1), and described unauthorized carrier wave is TDD carrier wave；Simultaneously Assume that the second transmission node (UE1) carries out CCA detection on the end of subframe #n+k-1, specific to such as figure In embodiment shown in 30, eNB sends to UE1 in subframe #8 of the transmission frame #x of unauthorized carrier wave and adjusts Degree authorizes, then the second transmission node UE1 is according to the timing relationship of existing LTE TDD system, will be in transmission Subframe #2 of frame #x+1 with and subsequent 2 subframes on send PUSCH, k is 4 here, exists at UE1 Before sending PUSCH, the end (namely subframe #n+k-1) in subframe #1 of transmission frame #x+1 is carried out CCA detects；If it is not busy that the testing result of CCA is channel, then UE1 is passing after completing CCA detection Subframe #2 of defeated frame #x+1 with and subsequent subframe #3 and subframe #4 on carry out PUSCH transmission, Qi Zhongchuan Carry out in subframe #3 of defeated frame #x+1 and subframe #4 being made without CCA detection during PUSCH transmission, also That is, when a scheduling authorization triggers the PUSCH transmission of multiple subframes, UE1 has only at first PUSCH carries out CCA detection before sending.

For the PUSCH of continuous three subframes that a scheduling authorization triggers, can corresponding three independent biographies Defeated piece, it is also possible to three corresponding transmission blocks of subframe.

When the testing result of CCA is channel busy, UE1 can be according to specific embodiment 4-3 or specifically real Execute the method described in example 4-4, corresponding subframe carries out the re-transmission of the PUSCH of described 3 subframes, as Shown in Figure 31.

Or, when the testing result of CCA is channel busy, and continuous three subframes that scheduling authorization triggers are divided Not during corresponding three independent transmission blocks, UE1 can also process in the following way:

In subframe #n+k (namely first PUSCH transmission subframe, i.e. subframe #2 of transmission frame #x+1) End proceed CCA detection, if the result of CCA detection is that channel is not busy, then UE1 is at transmission frame Second and the PUSCH transmission of the 3rd transmission block is carried out, according to specifically in subframe #3 of #x+1 and subframe #4 Method described in embodiment 4-3 or specific embodiment 4-4, carries out described first son in corresponding subframe The re-transmission of the PUSCH of frame, as shown in figure 32.

If when the result of CCA that the end of subframe #n+k is carried out detection is channel busy, then UE1 will be In subframe #n+k+1 (namely second PUSCH transmission subframe, i.e. subframe #3 of transmission frame #x+1) End proceeds CCA detection, if the result of CCA detection is the channel spare time, then UE1 is at transmission frame #x+1 Subframe #4 on carry out the PUSCH transmission of the 3rd transmission block, according to specific embodiment 4-3 or specifically real Execute the method described in example 4-4, corresponding subframe is carried out the PUSCH's of described first and second subframes Retransmit, as shown in figure 33.

Specific embodiment 4-6

In the embodiment be above given, when CCA testing result is channel busy, when UE retransmits PUSCH Or carry out on unauthorized carrier wave, if unauthorized carrier wave sends, then before UE sends PUSCH all Needing to carry out CCA detection, the result of CCA detection depends on current channel condition, thus UE also has May or can not send.To this end, this gives UE to retransmit the another way of PUSCH, with Reduce the time delay of PUSCH.In the present embodiment, PUSCH, therefore, base station are not sent due to UE Side is by corresponding detection (as detected whether to send the energy of signal on the Resource Block of scheduling PUSCH) Judge that UE does not send PUSCH, thus know that UE does not rob the resource accounting for unauthorized carrier wave, because of This, in order to ensure that the PUSCH of UE can send in time, base station may indicate that UE is authorizing carrier wave enterprising Row PUSCH retransmits.

Each module described in the embodiment of the present invention can be by the central processing unit (Central in electronic equipment Processing Unit, CPU), digital signal processor (Digital Signal Processor, DSP) or can Programmed logic array (PLA) (Field-Programmable Gate Array, FPGA) realizes.

Those skilled in the art are it should be appreciated that embodiments of the invention can be provided as method, system or meter Calculation machine program product.Therefore, the present invention can use hardware embodiment, software implementation or combine software and The form of the embodiment of hardware aspect.And, the present invention can use and wherein include calculating one or more The computer-usable storage medium of machine usable program code (includes but not limited to disk memory and optical storage Device etc.) form of the upper computer program implemented.

The present invention is with reference to method, equipment (system) and computer program according to embodiments of the present invention Flow chart and/or block diagram describe.It should be understood that can be by computer program instructions flowchart and/or side Flow process in each flow process in block diagram and/or square frame and flow chart and/or block diagram and/or the knot of square frame Close.Can provide these computer program instructions to general purpose computer, special-purpose computer, Embedded Processor or The processor of other programmable data processing device is to produce a machine so that by computer or other can The instruction that the processor of programming data processing equipment performs produces for realizing in one flow process or multiple of flow chart The device of the function specified in flow process and/or one square frame of block diagram or multiple square frame.

These computer program instructions may be alternatively stored in and can guide computer or other programmable data processing device In the computer-readable memory worked in a specific way so that be stored in this computer-readable memory Instruction produces the manufacture including command device, and this command device realizes at one flow process of flow chart or multiple stream The function specified in journey and/or one square frame of block diagram or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, makes Sequence of operations step must be performed to produce computer implemented place on computer or other programmable devices Reason, thus the instruction performed on computer or other programmable devices provides for realizing flow chart one The step of the function specified in flow process or multiple flow process and/or one square frame of block diagram or multiple square frame.

The above, only presently preferred embodiments of the present invention, it is not intended to limit the protection model of the present invention Enclose.

Claims

1. a data transmission method, it is characterised in that the method includes:

The detection position of described CCA carries out CCA detection；

Method the most according to claim 1, it is characterised in that the mode using at least one of is true Determine the detection position of CCA:

Method the most according to claim 2, it is characterised in that the described frame length according to transmission frame determines Under the scene of the detection position of CCA, when there is multiple transmission frame length, the detection position of described CCA exists Position in the transmission frame of different transmission frame lengths is identical.

Method the most according to claim 1, it is characterised in that the detection position of described CCA meets At least one condition below:

Transmission frame is uniformly distributed；

In Preset Time constant, or dynamically change in each transmission frame；

At least in last subframe being positioned at transmission frame；

At least in first subframe being positioned at transmission frame.

Method the most according to claim 4, it is characterised in that the detection position of CCA at least Time in individual last subframe being positioned at transmission frame, described in be positioned at last subframe of transmission frame intercept subframe Comprise successively a data transmission region and one free time region, described free time region lasting time Between not less than being to meet the shortest free time of control requirement, wherein, described in intercept subframe and refer to comprise CCA inspection The subframe that location is put.

Method the most according to claim 5, it is characterised in that when described transmission frame comprises multiple intercepting During subframe, except be positioned at last subframe of transmission frame intercept subframe in addition to other intercept subframe and comprise successively One data transmission region and one free time region, the persistent period in region described free time is control Requirement carrying out, whether the most unauthorized carrier wave is in the time needed for idle condition detection, or is N number of biography Defeated symbol duration, wherein N is the integer more than 0.

Method the most according to claim 4, it is characterised in that the detection position of CCA at least Time in individual first subframe being positioned at transmission frame, described in be positioned at first subframe of transmission frame intercept subframe successively Comprise one free time a region and data transmission region, the persistent period in region described free time is Control carries out in requiring whether the most unauthorized carrier wave is in the time needed for idle condition detection, or is N Individual transmission symbol duration, wherein N is the integer more than 0；Last height of described transmission frame Frame only comprises a data transmission region, or, comprise successively a data transmission region and one idle time Between region, last subframe described free time region persistent period not less than for meeting control requirement The shortest free time and the free time of described first subframe between difference, and minima is zero；Its In, described in intercept subframe and refer to comprise the subframe of CCA detection position.

Method the most according to claim 7, it is characterised in that when described transmission frame comprises multiple intercepting During subframe, described in intercept subframe comprise successively one free time a region and data transmission region, described The persistent period in region free time is to carry out whether the most unauthorized carrier wave is in idle condition during control requires Time needed for detection, or be N number of transmission symbol duration, wherein N is the integer more than 0.

Method the most according to claim 7, it is characterised in that be positioned at transmission when described transmission frame comprises When intercepting subframe of last subframe of frame, described in intercept subframe comprise successively first free time region, number According to transmission region and second free time region, wherein said first free time region persistent period be Control carries out in requiring whether the most unauthorized carrier wave is in the time needed for idle condition detection, or is N Individual transmission symbol duration, wherein N is the integer more than 0；Described second free time region Persistent period not less than during for meeting the shortest free time that control requires and described first subframe idle Difference between, and minima is zero.

10. according to the method described in claim 5 or 7 or 9, it is characterised in that in the inspection of described CCA Location is put and is carried out CCA detection, including: intercept subframe free time region or first free time district The end in territory carries out CCA detection.

11. methods according to claim 2, it is characterised in that when the detection position root of described CCA When determining according to the transmission timing relationship of scheduling authorization and correspondence, the first transmission node passes to second in subframe #n Defeated node sends scheduling authorization, and the second transmission node carries out CCA detection at the end of subframe #n+k-1, or Person detects at the CCA that proceeds by of subframe #n+k,

Wherein, described k determines according to one of following mode:

Described k is predefined value.

12. methods according to claim 11, it is characterised in that

When described second transmission node carries out CCA detection at the end of subframe #n+k-1, described second transmission When node carries out PUSCH transmission, delete at least one symbol last of last PUSCH transmission subframe；

13. methods according to claim 12, it is characterised in that

When described CCA testing result is channel idle, described second transmission node is awarded according to described scheduling Power, carries out PUSCH transmission in subframe #n+k of described unauthorized carrier wave, or, described unauthorized Carry out data transmission in subframe #n+k of carrier wave and thereafter at least one subframe of continuous print；

14. 1 kinds of data transmission devices, it is characterised in that this device includes: detection position determination module, Detection module and data transmission module；Wherein,

15. devices according to claim 14, it is characterised in that described detection position determination module has Body determines the detection position of CCA for using the mode of at least one of:

16. devices according to claim 12, it is characterised in that described detection position determination module root Determine under the scene of detection position of CCA according to the frame length of transmission frame, when there is multiple transmission frame length, described Position in the transmission frame of different transmission frame lengths, the detection position of CCA is identical.

17. devices according to claim 14, it is characterised in that described detection position determination module is true Satisfied at least one condition following in the detection position of fixed CCA:

Transmission frame is uniformly distributed；

In Preset Time constant, or dynamically change in each transmission frame；

At least in last subframe being positioned at transmission frame；

At least in first subframe being positioned at transmission frame.

18. devices according to claim 17, it is characterised in that the detection position of CCA is at least Time in one last subframe being positioned at transmission frame, described in be positioned at last subframe of transmission frame intercept son Frame comprise successively a data transmission region and one free time region, continuing of region of described free time Time not less than being to meet the shortest free time of control requirement, wherein, described in intercept subframe and refer to comprise CCA The subframe of detection position.

19. devices according to claim 18, it is characterised in that when described transmission frame comprises multiple detecing When listening subframe, except be positioned at last subframe of transmission frame intercept subframe in addition to other intercept subframe and wrap successively Containing a data transmission region and one free time region, described free time region persistent period for pipe System carries out in requiring whether the most unauthorized carrier wave is in the time needed for idle condition detection, or is N number of Transmission symbol duration, wherein N is the integer more than 0.

20. devices according to claim 17, it is characterised in that the detection position of CCA is at least Time in one first subframe being positioned at transmission frame, described in be positioned at the subframe of intercepting of first subframe of transmission frame and depend on Secondary comprise one free time a region and data transmission region, described free time region persistent period Carry out in requiring for control whether the most unauthorized carrier wave is in the time needed for idle condition detection, or be N number of transmission symbol duration, wherein N is the integer more than 0；Last of described transmission frame Subframe only comprises a data transmission region, or, comprise a data transmission region and a free time successively Time zone, last subframe described free time region persistent period not less than for meet control will Difference between the shortest free time and the free time of described first subframe asked, and minima is zero； Wherein, intercept subframe described in and refer to comprise the subframe of CCA detection position.

21. devices according to claim 20, it is characterised in that when described transmission frame comprises multiple detecing When listening subframe, described in intercept subframe comprise successively one free time a region and data transmission region, institute The persistent period stating free time region is to carry out during control requires whether the most unauthorized carrier wave is in idle shape Time needed for state detection, or is N number of transmission symbol duration, and wherein N is whole more than 0 Number.

22. devices according to claim 20, it is characterised in that be positioned at biography when described transmission frame comprises When intercepting subframe of defeated last subframe of frame, described in intercept subframe comprise successively first free time region, Data transmission region and second free time region, wherein said first free time region persistent period Carry out in requiring for control whether the most unauthorized carrier wave is in the time needed for idle condition detection, or be N number of transmission symbol duration, wherein N is the integer more than 0；Described second free time district The persistent period in territory is not less than for meeting the shortest free time and the free time of described first subframe that control requires Difference between time, and minima is zero.

23. according to the device described in claim 18 or 20 or 22, it is characterised in that described detection module, For intercept subframe free time region or first free time region end carry out CCA detection.

24. 1 kinds of data transmission systems, it is characterised in that this system includes that the first transmission node and second passes Defeated node, the detection position of CCA determines according to the transmission timing relationship of scheduling authorization and correspondence；Wherein,

Wherein, described k determines according to one of following mode:

Described k is predefined value.

25. systems according to claim 24, it is characterised in that

When described second transmission node carries out CCA detection at the end of subframe #n+k-1, described second passes When defeated node carries out PUSCH transmission, be additionally operable to delete last PUSCH transmission subframe last the most at least One symbol；

26. systems according to claim 25, it is characterised in that