CN108430114A - Channel detection method, channel detection system, base station and terminal - Google Patents
Channel detection method, channel detection system, base station and terminal Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0808—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using carrier sensing, e.g. as in CSMA
Abstract
The invention discloses a kind of channel detection method, Channel Detection system, base station and terminal, the method includes：Determine the channel occupancy parameter of data；If the channel occupancy parameter is less than or equal to the first parameter preset, the data are sent under conditions of not executing Channel Detection；If the channel occupancy parameter is more than first parameter preset and is less than or equal to the second parameter preset, Channel Detection is carried out with the first presetting granularity and/or the first default competition window, and when testing result meets channel occupancy condition, send the data；If the channel occupancy parameter is more than second parameter preset, Channel Detection is then carried out with the second presetting granularity and/or the second default competition window, and when testing result meets channel occupancy condition, send the data, first presetting granularity is less than second presetting granularity, and the first default competition window is less than the described second default competition window.By means of the invention it is possible to reduce data delay.
Description
Technical field
The present invention relates to the communications field more particularly to a kind of channel detection method, Channel Detection system, base station and terminals.
Background technology
Traditional LTE auxiliary access (LTE Assisted Access, LAA), unlicensed spectrum be the structure based on LTE into
Row access, subcarrier spacing (subcarrier spacing) are 15KHZ, and each subframe is 1ms, is divided into 14 symbols.
Under such structure, for the Channel Detection mechanism of one shot, i.e., downlink is for including only to find reference signal
(Discovery Reference Signal, DRS) does not include Physical Downlink Shared Channel (Physical Downlink
Shared Channel, PDSCH) Channel Detection mechanism either uplink 2 mechanism of type, be that channel is detected in 25us
It is idle, then it represents that channel idle can occupy the channel, and wherein 25us points are 16us+9us.Under this mechanism, channel occupancy
Time is no more than 1ms.Under this structure, for the type 1 of the either uplink of the Channel Detection mechanism comprising PDSCH
Mechanism is after first detection delay period (the i.e. defer period) free time, then the random value N within the scope of competition window works as inspection
Measuring a 9us channel idle, then N subtracts 1, otherwise detects that a defer period channel idle, N continue to subtract 1 again, until
N is kept to 0, then it represents that can occupy the channel, wherein when detecting a 16us and M 9us channel idle, determines defer
Period channel idles.In this case, Channel holding time is according to the corresponding Channel holding time length of difference of priority
Difference, shortest maximum channel holding time are 2ms, and longest maximum channel holding time is 10ms.
In new wireless technology (New Radio, NR), especially for highly reliable low time delay (Ultra-Rel iable
And Low Latency Communications, URLLC) this low time delay business, scheduling granularity is mini-slot/mini
Time slot (mini-slot), the minimum value of mini-s lot can be 1 symbols, and the time span that occupies of this symbol with
It becoming larger for subcarrier spacing and becomes smaller.Even if subcarrier spacing is the 15KHZ consistent with LTE, the holding time of this channel
Also there was only 1/14ms, want short more than shortest maximum channel holding time 1ms, and (2 n is multiplied by for 15 for subcarrier spacing
Power) when, the time span of 1 symbol is 1/14 divided by (2 n times powers), in this case, still most according to current LTE
Short channel detection time 25us is detected, and can bring time delay.
Therefore, it is necessary to a kind of new channel detection method be provided, to reduce time delay.
Invention content
A kind of channel detection method of offer of the embodiment of the present invention, Channel Detection system, base station and terminal, can reduce data
Time delay.
In order to solve the above-mentioned technical problem, the invention is realized in this way：
In a first aspect, a kind of channel detection method is provided, including：
Determine the channel occupancy parameter of data；
If the channel occupancy parameter is less than or equal to the first parameter preset, sent under conditions of not executing Channel Detection
The data；
If the channel occupancy parameter is more than first parameter preset and is less than or equal to the second parameter preset, with first
Presetting granularity and/or the first default competition window carry out Channel Detection, and when testing result meets channel occupancy condition, send
The data；
It is default with the second presetting granularity and/or second if the channel occupancy parameter is more than second parameter preset
Competition window carries out Channel Detection, and when testing result meets channel occupancy condition, sends the data；Wherein, described
One presetting granularity is less than second presetting granularity, and the first default competition window is less than the described second default competition window.
Second aspect provides a kind of Channel Detection system, including：
Determining module, the channel occupancy parameter for determining data；
Processing module is used for：
If the channel occupancy parameter is less than or equal to the first parameter preset, sent out under conditions of not executing Channel Detection
Send the data；
If the channel occupancy parameter is more than first parameter preset and is less than or equal to the second parameter preset, with first
Presetting granularity and/or the first default competition window carry out Channel Detection, and when testing result meets channel occupancy condition, send
The data；
It is default with the second presetting granularity and/or second if the channel occupancy parameter is more than second parameter preset
Competition window carries out Channel Detection, and when testing result meets channel occupancy condition, sends the data；Wherein, described
One presetting granularity is less than second presetting granularity, and the first default competition window is less than the described second default competition window.
The third aspect provides a kind of base station, including：Channel Detection system as described in second aspect.
Fourth aspect provides a kind of terminal, including：Channel Detection system as described in second aspect.
In embodiments of the present invention, before transmitting data, corresponding letter can be determined according to the channel occupancy parameter of data
Road detection mode, the data that the first parameter preset is less than or equal to for channel occupancy parameter are directly transmitted without Channel Detection
Data are less than or equal to channel occupancy parameter the data of the second parameter preset, using less than the second presetting granularity and/or second
First presetting granularity of default competition window and/or the first default competition window carry out Channel Detection, by this programme, for letter
Road occupies the smaller data of parameter, can reduce the time of Channel Detection, reduce the time delay of data.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and constitutes the part of the present invention, this hair
Bright illustrative embodiments and their description are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is a kind of flow chart for channel detection method that one embodiment of the invention provides；
Fig. 2 is the structural schematic diagram for the mobile terminal that one embodiment of the invention provides；
Fig. 3 is the structural schematic diagram for the base station that one embodiment of the invention provides；
Fig. 4 is the structural schematic diagram for the terminal that one embodiment of the invention provides.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, the every other implementation that those of ordinary skill in the art are obtained without creative efforts
Example, shall fall within the protection scope of the present invention.
The specific implementation mode of embodiment in order to better illustrate the present invention first illustrates determining for mini-slot (mini-slot)
Justice.Mini-slot definition is given in current 5th third-generation mobile communication technology (5th-Generation, 5G) NR, i.e., mini-slot is
It is less than the length of a time slot (one slot).When a time slot symbol numbers be X, then the length of a mini-slot
(symbol numbers that i.e. mini-slot includes) can use ranging from 1 to the arbitrary integer between X-1.As shown in Figure 1, having with a time slot
For 14 symbolic numbers, the length of a mini-slot can in 1 symbol to the arbitrary integer between 13 symbols, mini-slot
The value range of initial position can also be the position where any one symbol in 14 symbols.
Fig. 1 is a kind of flow chart for channel detection method that one embodiment of the invention provides.Channel Detection as shown in Figure 1
Method may include：
S102, the channel occupancy parameter for determining data.
If S104, channel occupancy parameter are less than or equal to the first parameter preset, sent out under conditions of not executing Channel Detection
Send data.
If S106, channel occupancy parameter are more than the first parameter preset and are less than or equal to the second parameter preset, pre- with first
If granularity and/or the first default competition window carry out Channel Detection, and when testing result meets channel occupancy condition, send number
According to.
If S108, channel occupancy parameter are more than the second parameter preset, with the second presetting granularity and/or the second default competition
Window carries out Channel Detection, and when testing result meets channel occupancy condition, transmission data.Wherein, the first presetting granularity is small
In the second presetting granularity, the first default competition window is less than the second default competition window.
If the following table 1 is a kind of parameter schematic table of mini-slot provided by the present application, 2 are occupied with mini-slot in table
It is illustrated for a symbol.
Table 1
| Subcarrier spacing (KHz) | Occupy symbolic number (a) | Holding time (us) |
| 15 | 2 | 143 |
| 30 | 2 | 72 |
| 60 | 2 | 36 |
| 120 | 2 | 18 |
| 240 | 2 | 9 |
| 480 | 2 | 5 |
If the following table 2 is a kind of parameter schematic table of synchronizing signal block (SS block) provided by the present application, one of them
Synchronizing signal block occupies continuous 4 symbols.
Table 2
| Subcarrier spacing (KHz) | Occupy symbolic number (a) | Holding time (us) |
| 15 | 4 | 286 |
| 30 | 4 | 143 |
| 120 | 4 | 36 |
| 240 | 4 | 18 |
As can be seen that the difference of subcarrier spacing, the difference for occupying symbolic number all have an impact holding time.Different sons
Carrier wave interval, identical occupancy symbolic number, holding time are different.In the case where similarly occupying symbolic number, subcarrier spacing is bigger, accounts for
It is smaller with the time.
In the embodiment of the application, channel occupancy parameter is Channel holding time, and the first parameter preset is first
Preset time, the second parameter preset are the second preset time.Specifically, the first preset time can be 16us or 25us, second
Preset time is 1ms, and the first preset time and the second preset time are determined according to actual use situation, in the another of the application
In one embodiment, the first preset time may be other integers in 16us to 25us, such as 18us, 20us.It is exemplary
, it is 480KHz for subcarrier spacing, occupies the data that symbolic number is 2, because its Channel holding time 5us is less than first in advance
If the time directly transmits data, it is 30KHz for subcarrier spacing, occupies the data that symbolic number is 2, because of its channel occupancy
Time 72us is more than the first preset time and is less than the second preset time, with the first presetting granularity and/or the first default contention window
Mouth carries out Channel Detection, and when testing result meets channel occupancy condition, transmission data.
In the embodiment of the application, channel occupancy parameter includes subcarrier spacing and occupies symbolic number, and first is pre-
Setting parameter includes at least one set of first default subcarrier spacing and its corresponding first default maximum occupancy symbolic number, and second is default
Parameter includes at least one set of second default subcarrier spacing and its corresponding second default maximum occupancy symbolic number.Illustratively,
First parameter preset includes：Subcarrier spacing 15KHz and first is maximum to occupy symbolic number 0, subcarrier spacing 30KHz and first
Maximum occupies that symbolic number 0, subcarrier spacing 60KHz and first are maximum to occupy symbolic number 1, subcarrier spacing 120KHz and the
One maximum occupancy symbolic number 2, the maximum occupancy symbolic numbers 5 of subcarrier spacing 240KHz and first, subcarrier spacing 480KHz
And first maximum occupy symbolic number 10；Second parameter preset includes：Subcarrier spacing 15KHz and second is maximum to occupy symbolic number
14, subcarrier spacing 30KHz and second are maximum to occupy the maximum occupancy symbol of symbolic number 28, subcarrier spacing 60KHz and second
Number 56, subcarrier spacing 120KHz and second are maximum to occupy symbolic number 112, the maximums of subcarrier spacing 240KHz and second
Occupy the maximum occupancy symbolic number 448 of symbolic number 224, subcarrier spacing 480KHz and second, the first parameter preset and second
Parameter preset is determined according to actual use situation.Illustratively, be 480KHz for subcarrier spacing, occupancy symbolic number is
2 data are less than the corresponding first maximum occupancy symbolic numbers 10 of 480KHz because occupying symbolic number 2, directly transmit data,
Channel Detection need not be carried out；It is 30KHz for subcarrier spacing, occupies the data that symbolic number is 4, because occupies symbolic number
4 the corresponding more than 30KHz first maximum occupancy symbolic numbers 0 and the second maximum occupancy symbolic number 28 corresponding less than 30KHz
It is a, Channel Detection is carried out with the first presetting granularity and/or the first default competition window, and when testing result meets channel occupancy item
When part, transmission data.
In the embodiment of the application, the rule in the second presetting granularity, the value and LAA of the second default competition window
Fixed Channel Detection parameter is consistent, specifically, Channel Detection mechanism or uplink for only including the DRS PDSCH not included
2 mechanism of type, the second presetting granularity is 25us, and wherein 25us point is 16us+9us；For the Channel Detection comprising PDSCH
1 mechanism of type of mechanism or uplink, the second presetting granularity are 16+M*9us, and the second default competition window is q.
Further, for including only that DRS does not include the Channel Detection mechanism of PDSCH or 2 mechanism of type of uplink,
It is that channel idle is detected in 25us, then it represents that channel idle can occupy the channel, i.e. testing result meets channel occupancy item
Part, wherein 25us point are 16us+9us；For 1 mechanism of type of the either uplink of the Channel Detection mechanism comprising PDSCH, it is
After first detection defer period (16+M*9us) are idle, then the random value N within the scope of the second competition window, when detecting one
A 9us channel idles, then N subtract 1, otherwise detect that a defer period channel idle, N continue to subtract 1 again, until N is kept to
0, then it represents that the channel can be occupied, i.e. testing result meets channel occupancy condition, wherein when detecting a 16us and M
When the 9us free time, defer period channel idles are determined.
It should be understood that the specific implementation for carrying out Channel Detection using above-mentioned second presetting granularity, the second default competition window can
With identical as the channel sensitive manner of unlicensed spectrum specified in the LAA of this field, details are not described herein by the application.
In the embodiment of the application, the first presetting granularity be the second presetting granularity half rounding, first
The half rounding that default competition window is the second default competition window q.
In another embodiment herein, for include only the Channel Detection mechanism of PDSCH that DRS does not include or
2 mechanism of type of uplink, the first presetting granularity are 14us, and 14us points are 9us+5us, 16us and 9us in corresponding LAA；For
Including the Channel Detection mechanism of PDSCH or 1 mechanism of type of uplink, the first presetting granularity is 9+M*5us, and first is default competing
Strive the half rounding that window is the second default competition window q.
Illustratively, if the channel occupancy parameter of data is more than the first parameter preset and is less than or equal to the second parameter preset,
It is that letter is detected in 14us for including only 2 mechanism of type of Channel Detection mechanism of the DRS not comprising PDSCH either uplink
Road is idle, then it represents that channel idle can occupy the channel, i.e. testing result meets channel occupancy condition, and wherein 14us points are
9us+5us；It is first to detect defer for 1 mechanism of type of the either uplink of the Channel Detection mechanism comprising PDSCH
After period (9+M*5us) is idle, then the random value N within the scope of the first competition window, when detecting that a 5us channel is empty
Spare time, then N subtract 1, otherwise detect that a defer period channel idle, N continue to subtract 1 again, until N is kept to 0, then it represents that can be with
The channel is occupied, i.e. testing result meets channel occupancy condition, wherein when detecting a 9us and M 5us free time, determine
Defer period channel idles.
In another embodiment herein, for include only the Channel Detection mechanism of PDSCH that DRS does not include or
2 mechanism of type of uplink, the first presetting granularity are 13us, and wherein 13us points are 9us+4us, 16us and 9us in corresponding LAA；
For the type1 mechanism of Channel Detection mechanism or uplink comprising PDSCH, the first presetting granularity is 9+M*4us, and first is default
Competition window is the half rounding of the second default competition window q.Certainly, in another embodiment herein, first
Default competition window may be less than other numerical value of the second default competition window.
In another embodiment herein, for include only the Channel Detection mechanism of PDSCH that DRS does not include or
2 mechanism of type of uplink, the first presetting granularity are 13us, and wherein 13us points are 8us+5us, 16us and 9us in corresponding LAA；
For the type1 mechanism of Channel Detection mechanism or uplink comprising PDSCH, the first presetting granularity is 8+M*5us, and first is default
Competition window is the half rounding of the second default competition window q.Certainly, in another embodiment herein, first
Default competition window may be less than other numerical value of the second default competition window.
In another embodiment herein, for include only the Channel Detection mechanism of PDSCH that DRS does not include or
2 mechanism of type of uplink, the first presetting granularity are 12us, and wherein 12us points are 8us+4us, 16us and 9us in corresponding LAA；
For the type1 mechanism of Channel Detection mechanism or uplink comprising PDSCH, the first presetting granularity is 8+M*4us, and first is default
Competition window is the half rounding of the second default competition window q.Certainly, in another embodiment herein, first
Default competition window may be less than other numerical value of the second default competition window.
It should be understood that the specific implementation for carrying out Channel Detection using above-mentioned first presetting granularity, the first default competition window can
With similar to the channel sensitive manner of unlicensed spectrum specified in the LAA of this field, difference is only that in detection parameters and presets
The setting of granularity and default competition window is different, and details are not described herein by the application.
In general, the permissible value of the second default competition window q is as shown in table 3 below, table 3 is channel access priority (Channel
Access Priority Class) table, wherein p indicates channel access priority (Channel Access Priority
Class), mpIndicate the number of M, CWmin,pIndicate the minimum value of competition window q, CWmax,pIndicate the maximum value of competition window q,
Tmcot,pIndicate maximum channel holding time, CWpIndicate the permissible value of competition window q.
Table 3
Channel detection method provided by the invention can determine before transmitting data according to the channel occupancy parameter of data
Corresponding channel sensitive manner is less than or equal to channel occupancy parameter the data of the first parameter preset, without Channel Detection,
Data are directly transmitted, the data of the second parameter preset are less than or equal to for channel occupancy parameter, using less than the second presetting granularity
And/or second default competition window the first presetting granularity and/or the first default competition window carry out Channel Detection, pass through we
Case can reduce the time of Channel Detection for the smaller data of channel occupancy parameter, reduce the time delay of data.
Fig. 2 is the structural schematic diagram for the Channel Detection system that one embodiment of the invention provides.As shown in Fig. 2, the channel
Detecting system 200 may include：
Determining module 21, the channel occupancy parameter for determining data；
Processing module 22, is used for：
If the channel occupancy parameter is less than or equal to the first parameter preset, sent under conditions of not executing Channel Detection
The data；
If the channel occupancy parameter is more than first parameter preset and is less than or equal to the second parameter preset, with first
Presetting granularity and/or the first default competition window carry out Channel Detection, and when testing result meets channel occupancy condition, send
The data；
It is default with the second presetting granularity and/or second if the channel occupancy parameter is more than second parameter preset
Competition window carries out Channel Detection, and when testing result meets channel occupancy condition, sends the data；Wherein, described
One presetting granularity is less than second presetting granularity, and the first default competition window is less than the described second default competition window.
In the embodiment of the application, the channel occupancy parameter is Channel holding time, the described first default ginseng
Number is the first preset time, and second parameter preset is the second preset time.
In the embodiment of the application, the channel occupancy parameter includes subcarrier spacing and occupancy symbolic number, institute
It includes that at least one set of first default subcarrier spacing and its corresponding first default maximum occupy symbolic number to state the first parameter preset,
Second parameter preset includes at least one set of second default subcarrier spacing and its corresponding second default maximum occupancy symbol
Number.
In the embodiment of the application, for including only Channel Detection mechanism or uplink of the DRS not comprising PDSCH
2 mechanism of type, first presetting granularity is 14us, and wherein 14us point is 9us+5us, and the channel comprising PDSCH is examined
1 mechanism of type of survey mechanism or uplink, first presetting granularity are 9+M*5us；Alternatively, for only not including comprising DRS
The Channel Detection mechanism of PDSCH or 2 mechanism of type of uplink, first presetting granularity are 13us, and wherein 13us points are
9us+4us, for 1 mechanism of type of Channel Detection mechanism or uplink comprising PDSCH, first presetting granularity is 9+
M*4us；Alternatively, for include only Channel Detection mechanism or uplink of the DRS not comprising PDSCH 2 mechanism of type, described the
One presetting granularity is 13us, and wherein 13us point is 8us+5us, for the Channel Detection mechanism comprising PDSCH or uplink
1 mechanism of type, first presetting granularity are 8+M*5us；For only include DRS not comprising PDSCH Channel Detection mechanism or
2 mechanism of type of person's uplink, first presetting granularity are 12us, and wherein 12us points are 8us+4us, for including PDSCH's
1 mechanism of type of Channel Detection mechanism or uplink, first presetting granularity are 8+M*4us.
In the embodiment of the application, the first default competition window is the two of the described second default competition window
/ mono- rounding.
In the embodiment of the application, second presetting granularity, the second default competition window and LTE are assisted
Channel Detection parameter specified in access is consistent.
Channel Detection system provided in an embodiment of the present invention can realize each process realized in Fig. 1 embodiments of the method,
To avoid repeating, which is not described herein again.Channel Detection system provided in an embodiment of the present invention before transmitting data can basis
The channel occupancy parameter of data determines corresponding channel sensitive manner, is less than or equal to the first parameter preset for channel occupancy parameter
Data directly transmit data without Channel Detection, for channel occupancy parameter be less than or equal to the second parameter preset number
According to using the first presetting granularity and/or the first default contention window less than the second presetting granularity and/or the second default competition window
Mouth carries out Channel Detection, and the time of Channel Detection can be reduced for the smaller data of channel occupancy parameter by this programme,
Reduce the time delay of data.
Fig. 3 is the structural schematic diagram for the base station that one embodiment of the invention provides.As shown in figure 3, implementation according to the present invention
The base station 300 of example, including：Above-mentioned Channel Detection system 200.
It base station provided in an embodiment of the present invention before transmitting data can be according to the determination pair of the channel occupancy parameter of data
The channel sensitive manner answered is less than or equal to channel occupancy parameter the data of the first parameter preset, without Channel Detection, directly
Receive and send data, for channel occupancy parameter be less than or equal to the second parameter preset data, using less than the second presetting granularity and/
Or second default competition window the first presetting granularity and/or the first default competition window carry out Channel Detection, by this programme,
For the smaller data of channel occupancy parameter, the time of Channel Detection can be reduced, reduces the time delay of data.
Fig. 4 is the structural schematic diagram for the terminal that one embodiment of the invention provides.As shown in figure 4, implementation according to the present invention
The base station 400 of example, including：Above-mentioned Channel Detection system 200.
Terminal provided in an embodiment of the present invention before transmitting data can be according to the determination pair of the channel occupancy parameter of data
The channel sensitive manner answered is less than or equal to channel occupancy parameter the data of the first parameter preset, without Channel Detection, directly
Receive and send data, for channel occupancy parameter be less than or equal to the second parameter preset data, using less than the second presetting granularity and/
Or second default competition window the first presetting granularity and/or the first default competition window carry out Channel Detection, by this programme,
For the smaller data of channel occupancy parameter, the time of Channel Detection can be reduced, reduces the time delay of data.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (14)
1. a kind of channel detection method, which is characterized in that including：
Determine the channel occupancy parameter of data；
If the channel occupancy parameter is less than or equal to the first parameter preset, under conditions of not executing Channel Detection described in transmission
Data；
If the channel occupancy parameter is more than first parameter preset and is less than or equal to the second parameter preset, default with first
Granularity and/or the first default competition window carry out Channel Detection, and when testing result meets channel occupancy condition, described in transmission
Data；
If the channel occupancy parameter is more than second parameter preset, with the second presetting granularity and/or the second default competition
Window carries out Channel Detection, and when testing result meets channel occupancy condition, sends the data；Wherein, described first is pre-
If granularity is less than second presetting granularity, the first default competition window is less than the described second default competition window.
2. the method as described in claim 1, which is characterized in that the channel occupancy parameter is Channel holding time, described the
One parameter preset is the first preset time, and second parameter preset is the second preset time.
3. the method as described in claim 1, which is characterized in that the channel occupancy parameter includes subcarrier spacing and occupancy symbol
Number, first parameter preset include at least one set of first default subcarrier spacing and its corresponding first default maximum occupancy
Symbolic number, second parameter preset include that at least one set of second default subcarrier spacing and its corresponding second default maximum account for
Signed number.
4. the method as described in claim 1, which is characterized in that for including only to find that reference signal DRS does not include under physics
The Channel Detection mechanism of the shared channel PDSCH of row or 2 mechanism of type of uplink, first presetting granularity are 14us, wherein
14us points are 9us+5us, default for 1 mechanism of type of Channel Detection mechanism or uplink comprising PDSCH, described first
Granularity is 9+M*5us；Alternatively, for including only that DRS does not include the Channel Detection mechanism of PDSCH or 2 machines of type of uplink
System, first presetting granularity are 13us, and wherein 13us point is 9us+4us, for the Channel Detection mechanism comprising PDSCH or
1 mechanism of type of uplink, first presetting granularity are 9+M*4us.
5. the method as described in claim 1, which is characterized in that the first default competition window is the described second default competition
The half rounding of window.
6. the method as described in claim 1, which is characterized in that second presetting granularity, the second default competition window
It is consistent with Channel Detection parameter specified in LTE auxiliary accesses.
7. a kind of Channel Detection system, which is characterized in that including：
Determining module, the channel occupancy parameter for determining data；
Processing module is used for：
If the channel occupancy parameter is less than or equal to the first parameter preset, under conditions of not executing Channel Detection described in transmission
Data；
If the channel occupancy parameter is more than first parameter preset and is less than or equal to the second parameter preset, default with first
Granularity and/or the first default competition window carry out Channel Detection, and when testing result meets channel occupancy condition, described in transmission
Data；
If the channel occupancy parameter is more than second parameter preset, with the second presetting granularity and/or the second default competition
Window carries out Channel Detection, and when testing result meets channel occupancy condition, sends the data；Wherein, described first is pre-
If granularity is less than second presetting granularity, the first default competition window is less than the described second default competition window.
8. Channel Detection system as claimed in claim 7, which is characterized in that when the channel occupancy parameter is channel occupancy
Between, first parameter preset is the first preset time, and second parameter preset is the second preset time.
9. Channel Detection system as claimed in claim 7, which is characterized in that the channel occupancy parameter includes subcarrier spacing
And symbolic number is occupied, first parameter preset includes that at least one set of first default subcarrier spacing and its corresponding first are preset
Maximum occupies symbolic number, and second parameter preset includes at least one set of second default subcarrier spacing and its corresponding second pre-
If maximum occupies symbolic number.
10. Channel Detection system as claimed in claim 7, which is characterized in that for including only letters of the DRS not comprising PDSCH
2 mechanism of road testing mechanism or the type of uplink, first presetting granularity are 14us, and wherein 14us points are 9us+5us, right
In 1 mechanism of type of Channel Detection mechanism or uplink comprising PDSCH, first presetting granularity is 9+M*5us；Alternatively,
For 2 mechanism of type only comprising Channel Detection mechanism of the DRS not comprising PDSCH or uplink, first presetting granularity is
13us, wherein 13us points are 9us+4us, described for 1 mechanism of type of Channel Detection mechanism or uplink comprising PDSCH
First presetting granularity is 9+M*4us.
11. Channel Detection system as claimed in claim 7, which is characterized in that the first default competition window is described the
The half rounding of two default competition windows.
12. Channel Detection system as claimed in claim 7, which is characterized in that second presetting granularity, described second are preset
Competition window is consistent with Channel Detection parameter specified in LTE auxiliary accesses.
13. a kind of base station, which is characterized in that include the Channel Detection system as described in any one of claim 7 to 12.
14. a kind of terminal, which is characterized in that include the Channel Detection system as described in any one of claim 7 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810078579.1A CN108430114B (en) | 2018-01-26 | 2018-01-26 | Channel detection method, channel detection system, base station and terminal |
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