CN106411482A - Downlink HARQ feedback method and device under TDD system - Google Patents
Downlink HARQ feedback method and device under TDD system Download PDFInfo
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- CN106411482A CN106411482A CN201611139056.0A CN201611139056A CN106411482A CN 106411482 A CN106411482 A CN 106411482A CN 201611139056 A CN201611139056 A CN 201611139056A CN 106411482 A CN106411482 A CN 106411482A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
- H04L5/0055—Physical resource allocation for ACK/NACK
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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Abstract
The present invention provides a downlink HARQ feedback method under a TDD system and a downlink HARQ feedback device under a TDD system. The downlink HARQ feedback method under a TDD system comprises: receiving downlink data transmitted on a subframe n in a current frame; feeding HARQACK or NACK feedback information for the downlink data back onto a target uplink subframe, wherein the target uplink subframe is an uplink subframe n+k in the current frame or an uplink subframe (n+k)%10 in the next frame adjacent to the current frame, % is a remainder operator, n is an integer from 0 to 9, and k is a preset value greater than 0. By the technical scheme of the invention, a downlink HARQ feedback time sequence can meet the minimum delay requirement of the TDD system and the control information overhead on each uplink subframe can also be effectively balanced.
Description
Technical field
The present invention relates to communication technical field, in particular to a kind of descending HARQ feedback method and of TDD system
Plant the descending HARQ feedback device of TDD system.
Background technology
With the development of mobile Internet, emerge the applied business meeting various specific functions in a large number.Some of them
Business is relatively low to data delay requirement, and such as receiving and dispatching mail downloads movies；But separately there are some business that data delay is had strictly
Requirement, such as network on-line plays, rushes to purchase, robbing red packet etc., and the time delay that this kind of business is usually required user data to the greatest extent may be used
Can short.With regard to how obtaining shorter user face data time delay, current LTE (Long Term Evolution, Long Term Evolution)
Two kinds of thinkings are mainly had in standard discussion：A kind of thinking be using shorter TTI (Transmission Time Interval,
Transmission Time Interval), that is, data transmit-receive interval adopts the TTI more shorter than current 1ms, to reduce data processing time delay；Another
Thinking is that in the terminal of highest version, serviceability preferably calculates, storage device and computational algorithm be so that data processing time delay
Reduce, the terminal of such as highest version supports shorter data processing time delay in the case of 1ms TTI to reduce uplink scheduling time delay
(receiving the time delay that UL-grant (uplink scheduling authorization) sends upstream data to terminal from terminal), HARQ (Hybrid
Automatic Repeat Request, hybrid automatic repeat-request) feedback delay (receives downlink data from terminal to send out to terminal
Send ACK (Acknowledgement the confirms response)/NACK (Negative for this downlink data
Acknowledgement, negative response)) etc..
During descending HARQ feedback, terminal, after the downlink data receiving base station transmission, needs a period of time
Processing data, is ready for ACK/NACK feedback.For the terminal of current version, the commonly required time is less than 4ms, therefore currently
In LTE FDD (Frequency Division Duplexing, FDD) system, HARQ feedback time delay is set as 4ms；So
And in LTE TDD (Time Division Duplexing, time division duplex) system, because TDD ascending-descending subframes configure not
With the design of HARQ feedback sequential is in addition to needing to meet minimum 4ms delay requirement in addition it is also necessary to consider in each sub-frame of uplink
The middle expense balancing descending HARQ ACK/NACK feedback, is loaded with the control message balancing each sub-frame of uplink, avoids out as far as possible
Existing sub-frame of uplink needs to feed back the ACK/NACK of more HARQ process, and some sub-frame of uplink are any without feeding back
The situation of the ACK/NACK of HARQ process.In current LTE TDD system, the design standard of descending HARQ feedback sequential is referring to 3GPP
TS 36.213.
But, the terminal of highest version is most probably met the processing delay less than 3ms, namely base station is sent out in descending sub frame n
The downlink data sending, the terminal of highest version can just be already prepared to the ACK/ of corresponding downlink data in sub-frame of uplink n+3
NACK feeds back.In this case, if FDD system, then the design of descending HARQ feedback sequential is very simple, i.e. highest version
The downlink data that terminal-pair meaning in office descending sub frame n receives accordingly feeds back corresponding ACK/NACK in sub-frame of uplink n+3.
And to TDD system, in addition it is also necessary to consider that the control information expense on each sub-frame of uplink is put down in addition to will meeting minimum 3ms time delay
The problem of weighing apparatus.If only considering to reduce HARQ feedback time delay (in the case of meeting 3ms time delay), a kind of frame configuration module pair
The HARQ sequential answered can be designed as shown in figure 1, sub-frame of uplink 2 needs to feed back the ACK/NACK of 2 descending HARQ processes, and
Sub-frame of uplink 7 does not need to feed back HARQ process ACK/NACK of any process, thus causes the control needed for sub-frame of uplink
Signaling consumption is uneven.
Therefore, currently for LTE TDD system 3ms latency pattern, there is no specific HARQ timing Design scheme.
Content of the invention
The present invention is based on the problems referred to above it is proposed that a kind of new technical scheme, for the different up-downgoing of TDD system
Sub-frame configuration situation, all can make the minimum-time lag that descending HARQ feedback sequential meets system require, and can simultaneously be effectively
Balance the control information expense on each sub-frame of uplink.
In view of this, first aspect of the present invention it is proposed a kind of descending HARQ feedback method of TDD system, including：Connect
The downlink data sending is received on subframe n in the current frame；By for the HARQ ACK of described downlink data or NACK feedback letter
Breath is fed back on target sub-frame of uplink, described target sub-frame of uplink be sub-frame of uplink n+k in described present frame or with
Sub-frame of uplink (n+k) %10 in the adjacent next frame of described present frame, wherein, % is complementation operator, n be 0～9 whole
Number, k is the preset value more than 0.
In this technical scheme, when terminal receives the downlink data of base station transmission in subframe n of present frame, in order that
Terminal be directed to this downlink data descending HARQ process ACK or NACK feedback information meet TDD system minimum-time lag require,
And simultaneously effective balance control information expense on each sub-frame of uplink, then can the sub-frame of uplink n+k of present frame or with
The transmission of ACK or NACK feedback information is carried out on sub-frame of uplink (n+k) %10 of the adjacent next frame of present frame, so, for
The different ascending-descending subframes configuring condition of TDD system, the sequence number according to subframe n receiving downlink data and corresponding k value
Determine the target sub-frame of uplink for carrying out HARQ feedback, to realize the descending HARQ feedback timing Design of TDD system.
Wherein, % represents that complementation accords with, and n is 0 to 9 integer, and k is the preset value that is more than 0 corresponding with n.
After the downlink data sending in subframe n in technique scheme it is preferable that in receiving described present frame,
Described will be fed back on target sub-frame of uplink for the HARQ ACK of described downlink data or NACK feedback information before, also
Including：Determine the frame configuration mode of described present frame；Value according to n and the value of the described frame configuration mode described k of acquisition.
In this technical scheme, descending for receive in subframe n for sending in order to more quickly and accurately determine
The target sub-frame of uplink of the ACK or NACK feedback information of data, can determine working as of the subframe n place receiving downlink data first
The frame configuration mode of previous frame, combines the value that frame configuration mode determines k corresponding with n, then thus navigating to this target-subframe
To carry out HARQ feedback.
It is preferable that the value of described k is the integer more than or equal to 3 in any of the above-described technical scheme, described TDD system
The minimum 3ms of HARQ time delay of system.
In this technical scheme, for the different ascending-descending subframes configuring condition of TDD system, the value of k further may be used
Think more than or equal to 3 integers, to guarantee the delay requirement of the descending HARQ feedback meeting TDD system 3ms.
It is preferable that the described value according to n and described frame configuration mode obtain described k in any of the above-described technical scheme
Value step, specifically include：When described present frame is the first frame configuration mode, if the value of n is respectively 0,1,5 and 6,
Then the value of corresponding described k is 3；When described present frame be the second frame configuration mode when, if the value of n be respectively 0,1,4,
5th, 6 and 9, then the value of corresponding described k respectively 3,6,3,3,6 and 3；When described present frame is the 3rd frame configuration mode,
If the value of n is respectively 0,1,3,4,5,6,8 and 9, the value of corresponding described k is respectively 7,6,4,3,7,6,4 and 3；When
When described present frame is the 4th frame configuration mode, if the value of n is respectively 0,1,5,6,7,8 and 9, corresponding described k takes
Value is respectively 4,3,7,6,5,5 and 4；When described present frame be the 5th frame configuration mode when, if the value of n be respectively 0,1,4,5,
6th, 7,8 and 9, then the value of corresponding described k respectively 3,11,8,7,6,6,5 and 4；When described present frame is the 6th frame configuration
During pattern, if the value of n is respectively 0,1,3,4,5,6,7,8 and 9, the value of corresponding described k is respectively 12,11,9,8,
7th, 6,5,4 and 3；When described present frame is the 7th frame configuration mode, if the value of n respectively 0,1,5,6 and 9, corresponding
The value of described k is respectively 4,6,3,6 and 4.
In this technical scheme, for the different ascending-descending subframes configuring condition of TDD system, according under the reception of present frame
The n value of subframe n of row data is different, and the corresponding k being more than or equal to 3 has one-to-one value, to guarantee for difference
TDD ascending-descending subframes configuration feature, descending HARQ feedback sequential disclosure satisfy that the minimum-time lag of TDD system requires, and simultaneously
The control information expense on each sub-frame of uplink can effectively be balanced.
It is preferable that described subframe n is descending sub frame or special subframe in any of the above-described technical scheme.
In this technical scheme, terminal both can also be in the special subframe n of present frame in the descending sub frame n of present frame
The downlink data that upper reception base station sends.
A second aspect of the present invention it is proposed that a kind of descending HARQ feedback device of TDD system, including：Receiver module, uses
The downlink data sending in subframe n receiving in the current frame；Feedback module, for receiving for described receiver module
The HARQ ACK of described downlink data or NACK feedback information fed back on target sub-frame of uplink, the up son of described target
Frame is the sub-frame of uplink n+k in described present frame or sub-frame of uplink (n+k) % in the next frame adjacent with described present frame
10, wherein, % is complementation operator, and n is 0～9 integer, and k is the preset value more than 0.
In this technical scheme, when terminal receives the downlink data of base station transmission in subframe n of present frame, in order that
Terminal be directed to this downlink data descending HARQ process ACK or NACK feedback information meet TDD system minimum-time lag require,
And simultaneously effective balance control information expense on each sub-frame of uplink, then can the sub-frame of uplink n+k of present frame or with
The transmission of ACK or NACK feedback information is carried out on sub-frame of uplink (n+k) %10 of the adjacent next frame of present frame, so, for
The different ascending-descending subframes configuring condition of TDD system, the sequence number according to subframe n receiving downlink data and corresponding k value
Determine the target sub-frame of uplink for carrying out HARQ feedback, to realize the descending HARQ feedback timing Design of TDD system.
Wherein, % represents that complementation accords with, and n is 0 to 9 integer, and k is the preset value that is more than 0 corresponding with n.
It is preferable that also including in technique scheme：Determining module, for receiving present frame in described receiver module
In described subframe n on send downlink data after, described feedback module by for described downlink data HARQ ACK or
Before NACK feedback information is fed back on target sub-frame of uplink, determine the frame configuration mode of described present frame；Acquisition module,
The described frame configuration mode determining for the value according to n and described determining module obtains the value of described k.
In this technical scheme, descending for receive in subframe n for sending in order to more quickly and accurately determine
The target sub-frame of uplink of the ACK or NACK feedback information of data, can determine working as of the subframe n place receiving downlink data first
The frame configuration mode of previous frame, combines the value that frame configuration mode determines k corresponding with n, then thus navigating to this target-subframe
To carry out HARQ feedback.
It is preferable that the value of described k is the integer more than or equal to 3 in any of the above-described technical scheme, described TDD system
The minimum 3ms of HARQ time delay of system.
In this technical scheme, for the different ascending-descending subframes configuring condition of TDD system, the value of k further may be used
Think more than or equal to 3 integers, to guarantee the delay requirement of the descending HARQ feedback meeting TDD system 3ms.
In any of the above-described technical scheme it is preferable that described acquisition module specifically for：When described present frame is the first frame
During configuration mode, if the value of n is respectively 0,1,5 and 6, the value of corresponding described k is 3；When described present frame is the
During two frame configuration modes, if the value of n is respectively 0,1,4,5,6 and 9, the value of corresponding described k is respectively 3,6,3,3,6
With 3；When described present frame is the 3rd frame configuration mode, if the value of n is respectively 0,1,3,4,5,6,8 and 9, corresponding institute
The value stating k is respectively 7,6,4,3,7,6,4 and 3；When described present frame is the 4th frame configuration mode, if the value of n is respectively
For 0,1,5,6,7,8 and 9, then the value of corresponding described k is respectively 4,3,7,6,5,5 and 4；When described present frame is the 5th frame
During configuration mode, if the value of n is respectively 0,1,4,5,6,7,8 and 9, the value of corresponding described k is respectively 3,11,8,7,
6th, 6,5 and 4；When described present frame is the 6th frame configuration mode, if the value of n is respectively 0,1,3,4,5,6,7,8 and 9,
The value of corresponding described k is respectively 12,11,9,8,7,6,5,4 and 3；When described present frame is the 7th frame configuration mode, if
The value of n is respectively 0,1,5,6 and 9, then the value of corresponding described k is respectively 4,6,3,6 and 4.
In this technical scheme, for the different ascending-descending subframes configuring condition of TDD system, according under the reception of present frame
The n value of subframe n of row data is different, and the corresponding k being more than or equal to 3 has one-to-one value, to guarantee for difference
TDD ascending-descending subframes configuration feature, descending HARQ feedback sequential disclosure satisfy that the minimum-time lag of TDD system requires, and simultaneously
The control information expense on each sub-frame of uplink can effectively be balanced.
It is preferable that described subframe n is descending sub frame or special subframe in any of the above-described technical scheme.
In this technical scheme, terminal both can also be in the special subframe n of present frame in the descending sub frame n of present frame
The downlink data that upper reception base station sends.
A third aspect of the present invention it is proposed that a kind of terminal, including：TDD as any one of technique scheme
The descending HARQ feedback device of system, therefore, this terminal has under the TDD system as any one of technique scheme
All beneficial effects of row HARQ feedback device, will not be described here.
By technical scheme, for the different ascending-descending subframes configuring condition of TDD system, all can make descending
The minimum-time lag that HARQ feedback sequential meets system requires, and can simultaneously be effectively balances the control information on each sub-frame of uplink
Expense.
Brief description
Fig. 1 shows the HARQ feedback time diagram in correlation technique；
Fig. 2 shows the schematic flow sheet of the descending HARQ feedback method of the TDD system of embodiments of the invention；
Fig. 3 shows the method flow schematic diagram of the value of determination k of embodiments of the invention；
Fig. 4 shows the HARQ feedback time diagram corresponding with the first frame configuration mode of embodiments of the invention；
Fig. 5 shows the HARQ feedback time diagram corresponding with the second frame configuration mode of embodiments of the invention；
Fig. 6 shows the HARQ feedback time diagram corresponding with the 3rd frame configuration mode of embodiments of the invention；
Fig. 7 shows the HARQ feedback time diagram corresponding with the 4th frame configuration mode of embodiments of the invention；
Fig. 8 shows the HARQ feedback time diagram corresponding with the 5th frame configuration mode of embodiments of the invention；
Fig. 9 shows the HARQ feedback time diagram corresponding with the 6th frame configuration mode of embodiments of the invention；
Figure 10 shows the HARQ feedback time diagram corresponding with the 7th frame configuration mode of embodiments of the invention；
Figure 11 shows the schematic block diagram of the descending HARQ feedback device of the TDD system of embodiments of the invention.
Specific embodiment
In order to the above objects, features and advantages of the present invention can be more clearly understood that, below in conjunction with the accompanying drawings and specifically real
Mode of applying is further described in detail to the present invention.It should be noted that in the case of not conflicting, the enforcement of the application
Feature in example and embodiment can be mutually combined.
Elaborate a lot of details in the following description in order to fully understand the present invention, but, the present invention also may be used
To be implemented different from other modes described here using other, therefore, protection scope of the present invention is not described below
Specific embodiment restriction.
Fig. 2 shows the schematic flow sheet of the descending HARQ feedback method of the TDD system of embodiments of the invention.
As shown in Fig. 2 the descending HARQ feedback method of TDD system according to an embodiment of the invention, specifically include following
Process step：
Step 202, receives the downlink data sending in subframe n in the current frame.
Wherein, terminal both can also receive base station in the descending sub frame n of present frame on the special subframe n of present frame
The downlink data sending, that is, subframe n can also be able to be both special subframe for descending sub frame.
Step 204, will be enterprising in target sub-frame of uplink for the HARQ ACK of described downlink data or NACK feedback information
Row feedback, described target sub-frame of uplink is sub-frame of uplink n+k in described present frame or next adjacent with described present frame
Sub-frame of uplink (n+k) %10 in frame, wherein, % is complementation operator, and n is 0～9 integer, and k is the preset value more than 0.
In this embodiment, when terminal receives the downlink data of base station transmission in subframe n of present frame, in order that eventually
End for this downlink data descending HARQ process ACK or NACK feedback information meet TDD system minimum-time lag require, and
Simultaneously effective balance the control information expense on each sub-frame of uplink, then can the sub-frame of uplink n+k of present frame or with work as
The transmission of ACK or NACK feedback information is carried out on sub-frame of uplink (n+k) %10 of the adjacent next frame of previous frame, so, for TDD
The different ascending-descending subframes configuring condition of system, the sequence number according to subframe n receiving downlink data and corresponding k value determine
For carrying out the target sub-frame of uplink of HARQ feedback, to realize the descending HARQ feedback timing Design of TDD system.
Wherein, % represents that complementation accords with, and n is 0 to 9 integer, and k is the preset value that is more than 0 corresponding with n.
Further, in the above-described embodiments, after described step 102, before described step 104, also include as Fig. 3 institute
The process step of the value of determination k stated, specifically includes：
Step S30, determines the frame configuration mode of described present frame.
Step S32, the value according to n and described frame configuration mode obtain the value of described k.
In this embodiment, in order to more quickly and accurately determine for sending for the lower line number receiving in subframe n
According to ACK or NACK feedback information target sub-frame of uplink, can determine first receive downlink data subframe n be located current
The frame configuration mode of frame, then combine frame configuration mode determine k corresponding with n value, thus navigate to this target-subframe with
Carry out HARQ feedback.
Further, in any of the above-described embodiment, the value of described k is the integer more than or equal to 3, described TDD system
The minimum 3ms of HARQ time delay of system, that is, be directed to the different ascending-descending subframes configuring condition of TDD system, and the value of k further may be used
Think more than or equal to 3 integers, to guarantee the delay requirement of the descending HARQ feedback meeting TDD system 3ms.
Further, in any of the above-described embodiment, value according to n and frame configuration mode obtain the value of k, that is, be directed to
Different ascending-descending subframes configuring conditions, the corresponding relation of n and k, specifically may refer to descending in the 3ms latency pattern of table 1 below
HARQ ACK/NACK feeds back sequential：
Table 1
As shown in table 1, when described present frame is the first frame configuration mode (configuring 0), if the value of subframe numbers n is respectively
For 0,1,5 and 6, then the value of corresponding described k is 3, and specific HARQ feedback sequential is referring to Fig. 4；When described present frame is
During the second frame configuration mode (configuring 1), if the value of subframe numbers n is respectively 0,1,4,5,6 and 9, corresponding described k takes
Value is respectively 3,6,3,3,6 and 3, and specific HARQ feedback sequential is referring to Fig. 5；When described present frame is the 3rd frame configuration mode
When (configuring 2), if the value of subframe numbers n respectively 0,1,3,4,5,6,8 and 9, the value respectively 7 of corresponding described k,
6th, 4,3,7,6,4 and 3, specific HARQ feedback sequential is referring to Fig. 6；When described present frame (configures for the 4th frame configuration mode
3), when, if the value of subframe numbers n is respectively 0,1,5,6,7,8 and 9, the value of corresponding described k is respectively 4,3,7,6,5,5
With 4, specific HARQ feedback sequential is referring to Fig. 7；When described present frame is the 5th frame configuration mode (configuring 4), if subframe
The value of number n is respectively 0,1,4,5,6,7,8 and 9, then the value of corresponding described k is respectively 3,11,8,7,6,6,5 and 4, tool
The HARQ feedback sequential of body is referring to Fig. 8；When described present frame is the 6th frame configuration mode (configuring 5), if subframe numbers n's takes
Value is respectively 0,1,3,4,5,6,7,8 and 9, then the value of corresponding described k is respectively 12,11,9,8,7,6,5,4 and 3, specifically
HARQ feedback sequential referring to Fig. 9；When described present frame is the 7th frame configuration mode (configuring 6), if the value of subframe numbers n
It is respectively 0,1,5,6 and 9, then the value of corresponding described k is respectively 4,6,3,6 and 4, and specific HARQ feedback sequential is referring to figure
10, that is, the HARQ process in descending sub frame 0 feed back on the sub-frame of uplink 4 of this frame (i.e. present frame), the HARQ of descending sub frame 6 enters
Journey is fed back on the sub-frame of uplink 2 of next frame, and the timing Design of the program is in the case of meeting 3ms time delay, up at each
Subframe has 1 HARQ process needing feedback, takes into account time delay and demand of both control signaling balance.
In this embodiment, for the ascending-descending subframes configuring condition that TDD system is different, descending according to the reception of present frame
The n value of subframe n of data is different, and the corresponding k being more than or equal to 3 has one-to-one value, to guarantee for different
TDD ascending-descending subframes configure feature, and descending HARQ feedback sequential disclosure satisfy that minimum-time lag 3ms of TDD system requires, and simultaneously
The control information expense on each sub-frame of uplink can effectively be balanced.
Figure 11 shows the schematic block diagram of the descending HARQ feedback device of the TDD system of embodiments of the invention.
As shown in figure 11, the descending HARQ feedback device 1100 of TDD system according to an embodiment of the invention, including：Connect
Receive module 1102 and feedback module 1104.
Wherein, described receiver module 1102 is used for receiving the downlink data sending in subframe n in the current frame；Described anti-
Feedback module 1104 is used for the HARQ ACK or NACK feedback of the described downlink data receiving for described receiver module 1102
Information is fed back on target sub-frame of uplink, described target sub-frame of uplink be sub-frame of uplink n+k in described present frame or
Sub-frame of uplink (n+k) %10 in the next frame adjacent with described present frame, wherein, % is complementation operator, n be 0～9 whole
Number, k is the preset value more than 0.
In this embodiment, when terminal receives the downlink data of base station transmission in subframe n of present frame, in order that eventually
End for this downlink data descending HARQ process ACK or NACK feedback information meet TDD system minimum-time lag require, and
Simultaneously effective balance the control information expense on each sub-frame of uplink, then can the sub-frame of uplink n+k of present frame or with work as
The transmission of ACK or NACK feedback information is carried out on sub-frame of uplink (n+k) %10 of the adjacent next frame of previous frame, so, for TDD
The different ascending-descending subframes configuring condition of system, the sequence number according to subframe n receiving downlink data and corresponding k value determine
For carrying out the target sub-frame of uplink of HARQ feedback, to realize the descending HARQ feedback timing Design of TDD system.
Wherein, % represents that complementation accords with, and n is 0 to 9 integer, and k is the preset value that is more than 0 corresponding with n.
Further, in the above-described embodiments, described subframe n is descending sub frame or special subframe, and that is, terminal both can be
The descending sub frame n of present frame can also receive the downlink data of base station transmission on the special subframe n of present frame.
Further, in any of the above-described embodiment, as shown in figure 11, the descending HARQ feedback device of described TDD system
1100 also include：Determining module 1106 and acquisition module 1108.
Wherein, described determining module 1106 is used for receiving described subframe n in present frame in described receiver module 1102
After the downlink data sending, described feedback module 1104 will exist for the HARQ ACK of described downlink data or NACK feedback information
The frame configuration mode of described present frame, before being fed back, is determined on target sub-frame of uplink；Described acquisition module 1108 is used for root
Obtain the value of described k according to the described frame configuration mode that value and the described determining module 1106 of n determine.
In this embodiment, in order to more quickly and accurately determine for sending for the lower line number receiving in subframe n
According to ACK or NACK feedback information target sub-frame of uplink, can determine first receive downlink data subframe n be located current
The frame configuration mode of frame, then combine frame configuration mode determine k corresponding with n value, thus navigate to this target-subframe with
Carry out HARQ feedback.
Further, in any of the above-described embodiment, the value of described k is the integer more than or equal to 3, described TDD system
The minimum 3ms of HARQ time delay of system.
In this embodiment, that is, it is directed to the different ascending-descending subframes configuring condition of TDD system, the value of k further may be used
Think more than or equal to 3 integers, to guarantee the delay requirement of the descending HARQ feedback meeting TDD system 3ms.
Further, in any of the above-described embodiment, described acquisition module 1108 specifically for：When described present frame is the
During one frame configuration mode, if the value of n is respectively 0,1,5 and 6, the value of corresponding described k is 3；When described present frame
During for the second frame configuration mode, if the value of n is respectively 0,1,4,5,6 and 9, the value of corresponding described k is respectively 3,6,
3rd, 3,6 and 3；When described present frame is the 3rd frame configuration mode, if the value of n respectively 0,1,3,4,5,6,8 and 9, right
The value of the described k answering is respectively 7,6,4,3,7,6,4 and 3；When described present frame is the 4th frame configuration mode, if n's takes
Value is respectively 0,1,5,6,7,8 and 9, then the value of corresponding described k is respectively 4,3,7,6,5,5 and 4；When described present frame is
During the 5th frame configuration mode, if the value of n respectively 0,1,4,5,6,7,8 and 9, the value respectively 3 of corresponding described k,
11st, 8,7,6,6,5 and 4；When described present frame is the 6th frame configuration mode, if the value of n is respectively 0,1,3,4,5,6,7,8
With 9, then the value of corresponding described k is respectively 12,11,9,8,7,6,5,4 and 3；When described present frame is the 7th frame configuration mould
During formula, if the value of n is respectively 0,1,5,6 and 9, the value of corresponding described k is respectively 4,6,3,6 and 4.
In this embodiment, for the ascending-descending subframes configuring condition that TDD system is different, descending according to the reception of present frame
The n value of subframe n of data is different, and the corresponding k being more than or equal to 3 has one-to-one value, to guarantee for different
TDD ascending-descending subframes configure feature, and descending HARQ feedback sequential disclosure satisfy that the minimum-time lag of TDD system requires, and may be used simultaneously
Effectively to balance the control information expense on each sub-frame of uplink.
In any of the above-described embodiment, feedback module 1104, determining module 1106 and acquisition module 1108 can be central authorities
Processing unit (Central Processing Unit, CPU), microprocessor or digital signal processor (Digital Signal
Processor, DSP), receiver module 1102 can be antenna.
As one embodiment of the present of invention, can be by the descending HARQ of the TDD system described in any of the above-described embodiment
Feedback device 1100 is applied in terminal, and therefore, this terminal has the TDD system as any one of technique scheme
All beneficial effects of descending HARQ feedback device 1100, will not be described here.
Technical scheme is described in detail above in association with accompanying drawing, by technical scheme, for TDD system
The different ascending-descending subframes configuring conditions of system, all can make the minimum-time lag that descending HARQ feedback sequential meets system require, and
Can simultaneously be effectively balance the control information expense on each sub-frame of uplink.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of descending HARQ feedback method of TDD system is it is characterised in that include：
The downlink data sending is received on subframe n in the current frame；
To be fed back on target sub-frame of uplink for the HARQ ACK of described downlink data or NACK feedback information, described mesh
Mark sub-frame of uplink is the sub-frame of uplink n+k in described present frame or the sub-frame of uplink in the next frame adjacent with described present frame
(n+k) %10, wherein, % is complementation operator, and n is 0～9 integer, and k is the preset value more than 0.
2. descending HARQ feedback method according to claim 1 it is characterised in that receive described present frame in subframe
On n send downlink data after, described will be up in target for the HARQ ACK of described downlink data or NACK feedback information
Before being fed back in subframe, also include：
Determine the frame configuration mode of described present frame；
Value according to n and the value of the described frame configuration mode described k of acquisition.
3. descending HARQ feedback method according to claim 1 and 2 it is characterised in that the value of described k be more than or wait
In 3 integer, the minimum 3ms of HARQ time delay of described TDD system.
4. descending HARQ feedback method according to claim 3 is it is characterised in that the described value according to n and described frame
The step that configuration mode obtains the value of described k, specifically includes：
When described present frame is the first frame configuration mode, if the value of n is respectively 0,1,5 and 6, corresponding described k takes
Value is 3；
When described present frame is the second frame configuration mode, if the value of n is respectively 0,1,4,5,6 and 9, corresponding described k
Value be respectively 3,6,3,3,6 and 3；
When described present frame is the 3rd frame configuration mode, if the value of n is respectively 0,1,3,4,5,6,8 and 9, corresponding institute
The value stating k is respectively 7,6,4,3,7,6,4 and 3；
When described present frame is the 4th frame configuration mode, if the value of n respectively 0,1,5,6,7,8 and 9, corresponding described
The value of k is respectively 4,3,7,6,5,5 and 4；
When described present frame is the 5th frame configuration mode, if the value of n is respectively 0,1,4,5,6,7,8 and 9, corresponding institute
The value stating k is respectively 3,11,8,7,6,6,5 and 4；
When described present frame is the 6th frame configuration mode, if the value of n respectively 0,1,3,4,5,6,7,8 and 9, corresponding
The value of described k is respectively 12,11,9,8,7,6,5,4 and 3；
When described present frame is the 7th frame configuration mode, if the value of n is respectively 0,1,5,6 and 9, corresponding described k's
Value is respectively 4,6,3,6 and 4.
5. descending HARQ feedback method according to claim 1 is it is characterised in that described subframe n is descending sub frame or spy
Different subframe.
6. a kind of descending HARQ feedback device of TDD system is it is characterised in that include：
Receiver module, for receiving the downlink data sending in subframe n in the current frame；
Feedback module, for the HARQ ACK of described downlink data that will receive for described receiver module or NACK feedback letter
Breath is fed back on target sub-frame of uplink, described target sub-frame of uplink be sub-frame of uplink n+k in described present frame or with
Sub-frame of uplink (n+k) %10 in the adjacent next frame of described present frame, wherein, % is complementation operator, n be 0～9 whole
Number, k is the preset value more than 0.
7. descending HARQ feedback device according to claim 6 is it is characterised in that also include：
Determining module, for described receiver module receive present frame in described subframe n on send downlink data after, described
Feedback module will carry out feeding back it for the HARQ ACK of described downlink data or NACK feedback information on target sub-frame of uplink
Before, determine the frame configuration mode of described present frame；
Acquisition module, the described frame configuration mode determining for the value according to n and described determining module obtains taking of described k
Value.
8. the descending HARQ feedback device according to claim 6 or 7 it is characterised in that the value of described k be more than or wait
In 3 integer, the minimum 3ms of HARQ time delay of described TDD system.
9. descending HARQ feedback device according to claim 8 it is characterised in that described acquisition module specifically for：
When described present frame is the first frame configuration mode, if the value of n is respectively 0,1,5 and 6, corresponding described k takes
Value is 3；
When described present frame is the second frame configuration mode, if the value of n is respectively 0,1,4,5,6 and 9, corresponding described k
Value be respectively 3,6,3,3,6 and 3；
When described present frame is the 3rd frame configuration mode, if the value of n is respectively 0,1,3,4,5,6,8 and 9, corresponding institute
The value stating k is respectively 7,6,4,3,7,6,4 and 3；
When described present frame is the 4th frame configuration mode, if the value of n respectively 0,1,5,6,7,8 and 9, corresponding described
The value of k is respectively 4,3,7,6,5,5 and 4；
When described present frame is the 5th frame configuration mode, if the value of n is respectively 0,1,4,5,6,7,8 and 9, corresponding institute
The value stating k is respectively 3,11,8,7,6,6,5 and 4；
When described present frame is the 6th frame configuration mode, if the value of n respectively 0,1,3,4,5,6,7,8 and 9, corresponding
The value of described k is respectively 12,11,9,8,7,6,5,4 and 3；
When described present frame is the 7th frame configuration mode, if the value of n is respectively 0,1,5,6 and 9, corresponding described k's
Value is respectively 4,6,3,6 and 4.
10. descending HARQ feedback device according to claim 6 is it is characterised in that described subframe n is descending sub frame or spy
Different subframe.
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| CN201611139056.0A CN106411482A (en) | 2016-12-08 | 2016-12-08 | Downlink HARQ feedback method and device under TDD system |
| PCT/CN2017/087981 WO2018103289A1 (en) | 2016-12-08 | 2017-06-12 | Method and device for feeding back downlink harq of tdd system |
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| CN107154842A (en) * | 2017-07-19 | 2017-09-12 | 珠海市魅族科技有限公司 | HARQ feedback method and HARQ feedback device, network side equipment and terminal |
| WO2018103289A1 (en) * | 2016-12-08 | 2018-06-14 | 珠海市魅族科技有限公司 | Method and device for feeding back downlink harq of tdd system |
| WO2018228469A1 (en) * | 2017-06-14 | 2018-12-20 | Mediatek Inc. | Techniques of transmitting harq-ack feedback by user equipment |
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| CN106411482A (en) * | 2016-12-08 | 2017-02-15 | 珠海市魅族科技有限公司 | Downlink HARQ feedback method and device under TDD system |
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| CN102938693A (en) * | 2011-08-15 | 2013-02-20 | 普天信息技术研究院有限公司 | Feedback method of different long term evaluation-advanced (LTE-A) time division duplex (TDD) uplink and downlink proportion |
| CN103312470A (en) * | 2012-03-09 | 2013-09-18 | 电信科学技术研究院 | Method and device for realizing HARQ feedback |
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| WO2018228469A1 (en) * | 2017-06-14 | 2018-12-20 | Mediatek Inc. | Techniques of transmitting harq-ack feedback by user equipment |
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