CN107154842A - HARQ feedback method and HARQ feedback device, network side equipment and terminal - Google Patents
HARQ feedback method and HARQ feedback device, network side equipment and terminal Download PDFInfo
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- CN107154842A CN107154842A CN201710588781.4A CN201710588781A CN107154842A CN 107154842 A CN107154842 A CN 107154842A CN 201710588781 A CN201710588781 A CN 201710588781A CN 107154842 A CN107154842 A CN 107154842A
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- stti
- data
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- downlink data
- processing delay
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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
-
- 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
- H04L1/1607—Details of the supervisory signal
-
- 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
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
Abstract
The present invention proposes a kind of HARQ feedback method and HARQ feedback device, network side equipment and terminal, wherein, the HARQ feedback method for network side equipment includes：When transmitting data using sTTI, downlink data is sent to terminal on descending sub frame sTTI n, wherein the terminal is k sTTI for the HARQ ACK/NACK of the downlink data processing delay fed back；When by being switched to using sTTI transmission data using TTI transmission data, and the terminal on sub-frame of uplink sTTI n+k when can not complete to the HARQ ACK/NACK of downlink data feedback, configure the terminal and HARQ ACK/NACK feedbacks are carried out to the downlink data in first TTI subframe for meet the processing delay.By technical scheme, the time delay of HARQ feedback can be effectively reduced, spectrum efficiency is improved.
Description
Technical field
The present invention relates to communication technical field, in particular to HARQ feedback method, HARQ feedback device, network side
Equipment and terminal.
Background technology
With the development of mobile Internet, the applied business for largely meeting various specific functions has been emerged.It is some of
Business is relatively low to data delay requirement, for example receiving and dispatching mail, downloads movies；But separately there are some business to have strictly data delay
Requirement, such as network on-line played, 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 it is short.In LTE (Long Term Evolution, Long Term Evolution) network, transmission time interval (TTI,
Transmission Time Interval) it is to influence the important indicator of user data delay.What current LTE system was used
TTI is 1ms, namely a subframe, has 14 OFDM at general cyclic prefix (CP, Cyclic Prefix) in addition
(Orthogonal Frequency Division Multiplexing, orthogonal frequency division multiplexi) symbol, in Extended Cyclic
There are 12 OFDM symbols during prefix.During concrete application, transmitting terminal sends a data block per 1ms, and receiving terminal can receive one per 1ms
Individual data block.
In 3GPP (3rd Generation Partnership Project, third generation partner program) RAN
To being stood in LTE system using shorter problem in (Radio Access Network, wireless access network) #69 plenary sessions
, research using the TTI (short TTI, hereinafter sTTI) of shorter duration feasibility and possible beneficial effect.Mesh
Some preceding documents such as [R1-160942], [R1-160930] quantitatively have studied data of the reduction to LTE system of TTI durations
The influence of time delay, analysis display, not merely makes the transmission time interval of base station, terminal shorten, accordingly, with this using sTTI
The corresponding data processing time of transmission time interval can also be decreased, such as data code modulation and data demodulation time
It will be reduced with the reduction of data block size.At present, the OFDM symbol included in a sTTI may only have 2 or 3
Individual, control signaling expense is larger, and spectrum efficiency is not high, is mainly used in the application higher to delay requirement.And 1ms TTI are due to control
The expense of signaling processed is smaller thus have a higher spectrum efficiency, is adapted to the application not high to delay requirement.
In subsequent applications, the terminal in LTE network may be needed in both transmissions of shorter sTTI and 1ms TTI
Compartment switching at runtime.When occurring sTTI to TTI switching, unfinished HARQ (Hybrid Automatic Repeat
Request, hybrid automatic repeat-request) process ACK/NACK feedback will be affected.
In the LTE network using sTTI, for the downlink data sent on subframe sTTI n, corresponding HARQ ACK
(Acknowledgement confirms response)/NACK (Negative Acknowledgement, negative response) feedbacks occur
In sTTI n+k, k concrete numerical value is not yet determined at present, and its size is relevant with subframe sTTI duration, it is only necessary to meet
The sTTI of duration processing delay.In TTI, for the downlink data sent on subframe TTI n, corresponding HARQ
ACK/NACK feedbacks occur in TTI n+4.It is to 1ms TTI, k=6 with the sTTI switching at runtime comprising 2 OFDM symbols
Example, HARQ ACK/NACK feed back sequential as shown in figure 1, the downlink data sent on subframe sTTI 0 and sTTI 1, its HARQ
ACK/NACK feedbacks occur in subframe sTTI 6 and subframe sTTI 7, and for the sTTI after subframe sTTI 1 due to there occurs
Switching from sTTI to 1msTTI, then without the resource for carrying out HARQ ACK/NACK feedbacks accordingly.
The content of the invention
The present invention is based on above mentioned problem, it is proposed that a kind of new technical scheme, can be effectively reduced HARQ feedback
Time delay, improve spectrum efficiency.
In view of this, according to the first aspect of the invention, it is proposed that a kind of HARQ feedback method, it is adaptable to which network side is set
Standby, the HARQ feedback method includes：When transmitting data using sTTI, send descending to terminal on descending sub frame sTTI n
Data, wherein the terminal is k sTTI for the HARQ ACK/NACK of the downlink data processing delay fed back；When by
Switched to using sTTI transmission data and data are transmitted using TTI, and the terminal can not be completed on sub-frame of uplink sTTI n+k
During to the HARQ ACK/NACK of downlink data feedback, configure the terminal and meeting first TTI of the processing delay
HARQ ACK/NACK feedbacks are carried out to the downlink data in subframe.
In the technical scheme, when carrying out data interaction using the shorter sTTI transmission data of duration with terminal, under
Row subframe sTTI n send downlink data to terminal, and terminal needs to complete to the downlink data on sub-frame of uplink sTTI n+k
HARQ ACK/NACK feedbacks (i.e. ACK feed back or NACK feedback), but when switching to use by transmitting data using sTTI
TTI transmits data, then can exist anti-as the HARQ ACK/NACK of the downlink data without corresponding sub-frame of uplink sTTI n+k
Resource is presented, so that in order to ensure terminal can smoothly complete the HARQ ACK/NACK feedbacks to the downlink data, so that effectively
HARQ feedback time delay is reduced, data can be transmitted using sTTI in the satisfaction switched to after data are transmitted using TTI with configurating terminal
When HARQ feedback processing delay first TTI subframe on to the downlink data carry out HARQ ACK/NACK feedbacks, wherein locating
It is k sTTI to manage time delay.
In the above-mentioned technical solutions, it is preferable that k span is in the processing delay：4≤k≤8, and k is whole
Number.
In the technical scheme, passed when carrying out data interaction between network side equipment and terminal using the shorter sTTI of duration
During transmission of data, k's takes in the processing delay for the downlink data progress HARQ ACK/NACK feedbacks that terminal-pair network side equipment is sent
It is worth scope to be preferably greater than equal to 4 and be less than or equal to 8 integer, specific value is relevant with subframe sTTI duration.
In any of the above-described technical scheme, it is preferable that the descending sub frame sTTI n include 2 OFDM symbols or 3
OFDM symbol.
In the technical scheme, when transmitting data using the shorter sTTI of duration, a subframe sTTI can include 2
OFDM symbol or 3 OFDM symbols, when transmitting data using TTI by being switched to using sTTI transmission data, and terminal can not be
The HARQ ACK/ of downlink data sent to the network equipment on descending sub frame sTTI n are completed on sub-frame of uplink sTTI n+k
When NACK feeds back, HARQ can be carried out in first TTI subframe for meeting processing delay when transmitting data using sTTI
ACK/NACK feeds back, and to reduce the expense of control signaling, improves spectrum efficiency.
According to the second aspect of the invention, it is proposed that a kind of HARQ feedback device, it is adaptable to network side equipment, the HARQ
Feedback device includes：Sending module, for when using sTTI transmit data when, under being sent on descending sub frame sTTI n to terminal
Row data, wherein the terminal is k sTTI for the HARQ ACK/NACK of the downlink data processing delay fed back；Match somebody with somebody
Module is put, for being switched to when by transmitting data using sTTI using TTI transmission data, and the terminal can not be in sub-frame of uplink
When the HARQ ACK/NACK feedbacks to the downlink data are completed on sTTI n+k, configure the terminal and meeting the processing
HARQ ACK/NACK feedbacks are carried out to the downlink data in first TTI subframe of time delay.
In the technical scheme, when carrying out data interaction using the shorter sTTI transmission data of duration with terminal, under
Row subframe sTTI n send downlink data to terminal, and terminal needs to complete to the downlink data on sub-frame of uplink sTTI n+k
HARQ ACK/NACK feedbacks (i.e. ACK feed back or NACK feedback), but when switching to use by transmitting data using sTTI
TTI transmits data, then can exist anti-as the HARQ ACK/NACK of the downlink data without corresponding sub-frame of uplink sTTI n+k
Resource is presented, so that in order to ensure terminal can smoothly complete the HARQ ACK/NACK feedbacks to the downlink data, so that effectively
HARQ feedback time delay is reduced, data can be transmitted using sTTI in the satisfaction switched to after data are transmitted using TTI with configurating terminal
When HARQ feedback processing delay first TTI subframe on to the downlink data carry out HARQ ACK/NACK feedbacks, wherein locating
It is k sTTI to manage time delay.
In the above-mentioned technical solutions, it is preferable that k span is in the processing delay：4≤k≤8, and k is whole
Number；The descending sub frame sTTI n include 2 OFDM symbols or 3 OFDM symbols.
In the technical scheme, k span is preferably greater than in processing delay when transmitting data using sTTI
Integer equal to 4 and less than or equal to 8, specific value is relevant with subframe sTTI duration；Further, using duration compared with
When short sTTI transmits data, a subframe sTTI can include 2 OFDM symbols or 3 OFDM symbols, when by using sTTI
Transmission data are switched to transmits data using TTI, and terminal can not complete to exist to the network equipment on sub-frame of uplink sTTI n+k
During the HARQ ACK/NACK feedbacks of the downlink data sent on descending sub frame sTTI n, number can be transmitted using sTTI meeting
According to when processing delay first TTI subframe on carry out HARQ ACK/NACK feedbacks, to reduce the expense of control signaling, carry
Spectral efficient.
According to the third aspect of the invention we, it is proposed that a kind of network side equipment, including：Such as the technical side of above-mentioned second aspect
HARQ feedback device any one of case, therefore, the network side equipment have as any one of above-mentioned technical scheme
HARQ feedback device all beneficial effects, will not be repeated here.
According to the fourth aspect of the invention, a kind of HARQ feedback method is proposed, it is adaptable to terminal, the HARQ feedback method
Including：When transmitting data using sTTI, the downlink data that network side equipment is sent in descending sub frame sTTI n is received；When according to
Default processing delay carries out HARQ ACK/NACK feedbacks on sub-frame of uplink sTTI n+k to the downlink data, and by using
When sTTI transmission data are switched to using TTI transmission data, first TTI subframe for meeting the default processing delay is arranged on
On HARQ ACK/NACK feedbacks are carried out to the downlink data, wherein the default processing delay is k sTTI.
In the technical scheme, the shorter sTTI of duration is used to transmit data when carrying out data interaction with network side equipment
When, the downlink data that network side equipment is sent on descending sub frame sTTI n is received, and need on sub-frame of uplink sTTI n+k
The HARQ ACK/NACK feedbacks (i.e. ACK feeds back or NACK feeds back) to the downlink data are completed, but when by using sTTI transmission
Data are switched to transmits data using TTI, then can exist and be used as the downlink data without corresponding sub-frame of uplink sTTI n+k
The situation of HARQ ACK/NACK feedback resources, so as to ensure that the HARQ ACK/ smoothly completed to the downlink data
NACK feeds back, to be effectively reduced HARQ feedback time delay, can specifically be used in the satisfaction switched to after data are transmitted using TTI
HARQ ACK/ are carried out to the downlink data in first TTI subframe of HARQ feedback processing delay when sTTI transmits data
NACK feeds back, and wherein processing delay is k sTTI.
In the above-mentioned technical solutions, it is preferable that k span is in the default processing delay：4≤k≤8, and k is
Integer；The descending sub frame sTTI n include 2 OFDM symbols or 3 OFDM symbols.
In the technical scheme, k span is preferably greater than in processing delay when transmitting data using sTTI
Integer equal to 4 and less than or equal to 8, specific value is relevant with subframe sTTI duration；Further, using duration compared with
When short sTTI transmits data, a subframe sTTI can include 2 OFDM symbols or 3 OFDM symbols, when by using sTTI
Transmission data are switched to transmits data using TTI, and terminal can not complete to exist to the network equipment on sub-frame of uplink sTTI n+k
During the HARQ ACK/NACK feedbacks of the downlink data sent on descending sub frame sTTI n, number can be transmitted using sTTI meeting
According to when processing delay first TTI subframe on carry out HARQ ACK/NACK feedbacks, to reduce the expense of control signaling, carry
Spectral efficient.
According to the fifth aspect of the invention, it is proposed that a kind of terminal, the terminal includes：Transceiver, is used for working as
When sTTI transmits data, the downlink data that network side equipment is sent in descending sub frame sTTI n is received；Processor and memory, institute
State processor and realize following operate when being used to perform the computer program stored in the memory：When according to default processing delay
HARQ ACK/NACK feedbacks are carried out to the downlink data on sub-frame of uplink sTTI n+k, and by transmitting data using sTTI
When switching to using TTI transmission data, it is arranged in first TTI subframe for meet the default processing delay to described descending
Data carry out HARQ ACK/NACK feedbacks, wherein the default processing delay is k sTTI.
In the technical scheme, the shorter sTTI of duration is used to transmit data when carrying out data interaction with network side equipment
When, the downlink data that network side equipment is sent on descending sub frame sTTI n is received, and need on sub-frame of uplink sTTI n+k
The HARQ ACK/NACK feedbacks (i.e. ACK feeds back or NACK feeds back) to the downlink data are completed, but when by using sTTI transmission
Data are switched to transmits data using TTI, then can exist and be used as the downlink data without corresponding sub-frame of uplink sTTI n+k
The situation of HARQ ACK/NACK feedback resources, so as to ensure that the HARQ ACK/ smoothly completed to the downlink data
NACK feeds back, to be effectively reduced HARQ feedback time delay, can specifically be used in the satisfaction switched to after data are transmitted using TTI
HARQ ACK/ are carried out to the downlink data in first TTI subframe of HARQ feedback processing delay when sTTI transmits data
NACK feeds back, and wherein processing delay is k sTTI.
In the above-mentioned technical solutions, it is preferable that k span is in the default processing delay：4≤k≤8, and k is
Integer；The descending sub frame sTTI n include 2 OFDM symbols or 3 OFDM symbols.
In the technical scheme, k span is preferably greater than in processing delay when transmitting data using sTTI
Integer equal to 4 and less than or equal to 8, specific value is relevant with subframe sTTI duration；Further, using duration compared with
When short sTTI transmits data, a subframe sTTI can include 2 OFDM symbols or 3 OFDM symbols, when by using sTTI
Transmission data are switched to transmits data using TTI, and terminal can not complete to exist to the network equipment on sub-frame of uplink sTTI n+k
During the HARQ ACK/NACK feedbacks of the downlink data sent on descending sub frame sTTI n, number can be transmitted using sTTI meeting
According to when processing delay first TTI subframe on carry out HARQ ACK/NACK feedbacks, to reduce the expense of control signaling, carry
Spectral efficient.
By technical scheme, when transmitting data using TTI by being switched to using sTTI transmission data, for adopting
Unfinished sTTI HARQ progress feedbacks can meet processing when transmitting data using sTTI when transmitting data with sTTI
In first TTI subframe of time delay, so as to be effectively reduced the time delay of HARQ feedback, spectrum efficiency is improved.
Brief description of the drawings
Fig. 1 shows the sequential exemplary plot of HARQ feedback；
Fig. 2 shows the schematic flow sheet of the HARQ feedback method applied to network side equipment of the embodiment of the present invention；
Fig. 3 shows the schematic block diagram of the HARQ feedback device of the network side equipment of the embodiment of the present invention；
Fig. 4 shows the schematic block diagram of the network side equipment of the embodiment of the present invention；
Fig. 5 shows the schematic flow sheet of the HARQ feedback method applied to terminal of the embodiment of the present invention；
Fig. 6 shows the schematic block diagram of the terminal of the embodiment of the present invention.
Embodiment
It is below in conjunction with the accompanying drawings and specific real in order to which the above objects, features and advantages of the present invention can be more clearly understood that
Mode is applied the present invention is further described in detail.It should be noted that in the case where not conflicting, the implementation of the application
Feature in example and embodiment can be mutually combined.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still, the present invention may be used also
Implemented with being different from other modes described here using other, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
Fig. 2 shows the schematic flow sheet of the HARQ feedback method applied to network side equipment of the embodiment of the present invention.
As shown in Fig. 2 the HARQ feedback method applied to network side equipment according to embodiments of the present invention, specifically include with
Lower process step：
Step 202, when transmitting data using sTTI, downlink data is sent to terminal on descending sub frame sTTI n, its
Described in terminal for the HARQ ACK/NACK of the downlink data processing delay fed back be k sTTI.
Step 204, switched to when by transmitting data using sTTI using TTI transmission data, and the terminal can not be upper
When the HARQ ACK/NACK feedbacks to the downlink data are completed on row subframe sTTI n+k, the terminal is configured meeting
State and HARQ ACK/NACK feedbacks are carried out to the downlink data in first TTI subframe of processing delay.
It is understood that when carrying out data interaction using the shorter sTTI transmission data of duration with terminal, descending
Subframe sTTI n send downlink data to terminal, and terminal needs to complete to the downlink data on sub-frame of uplink sTTI n+k
HARQ ACK/NACK feedbacks (i.e. ACK feeds back or NACK feedbacks), but work as and use TTI by being switched to using sTTI transmission data
Data are transmitted, then can exist and be fed back without corresponding sub-frame of uplink sTTI n+k as the HARQ ACK/NACK of the downlink data
Resource, so that in order to ensure terminal can smoothly complete the HARQ ACK/NACK feedbacks to the downlink data, so as to effectively drop
Low HARQ feedback time delay, can be with configurating terminal when switching to the satisfaction after data are transmitted using TTI using sTTI transmission data
HARQ feedback processing delay first TTI subframe on to the downlink data carry out HARQ ACK/NACK feedbacks, wherein handling
Time delay is k sTTI.
Further, in the above-described embodiments, k span is in the processing delay：4≤k≤8, and k is whole
Number.
It is understood that being transmitted when carrying out data interaction between network side equipment and terminal using the shorter sTTI of duration
During data, k value in the processing delay for the downlink data progress HARQ ACK/NACK feedbacks that terminal-pair network side equipment is sent
Scope is preferably greater than the integer equal to 4 and less than or equal to 8, and specific value is relevant with subframe sTTI duration.
Further, in the above-described embodiments, the descending sub frame sTTI n include 2 OFDM symbols or 3 OFDM symbols
Number.
It is understood that when transmitting data using the shorter sTTI of duration, a subframe sTTI can include 2 OFDM
Symbol or 3 OFDM symbols, are switched to using TTI transmission data when by transmitting data using sTTI, and terminal can not be up
The HARQ ACK/NACK of downlink data for completing to send the network equipment on descending sub frame sTTI n on subframe sTTI n+k are anti-
During feedback, HARQ ACK/NACK can be carried out in first TTI subframe for meeting processing delay when transmitting data using sTTI
Feedback, to reduce the expense of control signaling, improves spectrum efficiency.
Further, in the above-described embodiments, network side equipment can include base station and/or base station control device.
Fig. 3 shows the schematic block diagram of the HARQ feedback device of the network side equipment of the embodiment of the present invention.
As shown in figure 3, the HARQ feedback device 30 of network side equipment according to embodiments of the present invention, including：Sending module
And configuration module.
Wherein, the sending module is used to, when transmitting data using sTTI, send out to terminal on descending sub frame sTTI n
Downlink data is sent, wherein the terminal is k for the HARQ ACK/NACK of the downlink data processing delay fed back
sTTI；The configuration module is used to work as transmits data by being switched to using sTTI transmission data using TTI, and the terminal can not
When the HARQ ACK/NACK feedbacks to the downlink data are completed on sub-frame of uplink sTTI n+k, the terminal is configured full
HARQ ACK/NACK feedbacks are carried out to the downlink data in first TTI subframe of the foot processing delay.
It is understood that when carrying out data interaction using the shorter sTTI transmission data of duration with terminal, descending
Subframe sTTI n send downlink data to terminal, and terminal needs to complete to the downlink data on sub-frame of uplink sTTI n+k
HARQ ACK/NACK feedbacks (i.e. ACK feeds back or NACK feedbacks), but work as and use TTI by being switched to using sTTI transmission data
Data are transmitted, then can exist and be fed back without corresponding sub-frame of uplink sTTI n+k as the HARQ ACK/NACK of the downlink data
Resource, so that in order to ensure terminal can smoothly complete the HARQ ACK/NACK feedbacks to the downlink data, so as to effectively drop
Low HARQ feedback time delay, can be with configurating terminal when switching to the satisfaction after data are transmitted using TTI using sTTI transmission data
HARQ feedback processing delay first TTI subframe on to the downlink data carry out HARQ ACK/NACK feedbacks, wherein handling
Time delay is k sTTI.
Further, in the above-described embodiments, k span is in the processing delay：4≤k≤8, and k is whole
Number；The descending sub frame sTTI n include 2 OFDM symbols or 3 OFDM symbols.
It is understood that being preferably greater than using the span of k in processing delay during sTTI transmission data
In 4 and integer less than or equal to 8, specific value is relevant with subframe sTTI duration；Further, it is shorter using duration
STTI transmission data when, subframe sTTI can include 2 OFDM symbols or 3 OFDM symbols, when by being passed using sTTI
Transmission of data is switched to transmits data using TTI, and terminal can not be completed to the network equipment under on sub-frame of uplink sTTI n+k
During the HARQ ACK/NACK feedbacks of the downlink data sent on row subframe sTTI n, data can be transmitted using sTTI meeting
When processing delay first TTI subframe on carry out HARQ ACK/NACK feedbacks, to reduce the expense of control signaling, improve
Spectrum efficiency.
Further, in the above-described embodiments, network side equipment can include base station and/or base station control device.
Fig. 4 shows the schematic block diagram of the network side equipment of the embodiment of the present invention.
Appoint as shown in figure 4, network side equipment 40 according to embodiments of the present invention, including as above in the embodiment of second aspect
HARQ feedback device 30 described in one, therefore, the network side equipment 40 have as any one of above-mentioned embodiment
All beneficial effects of HARQ feedback device 30, will not be repeated here.The network side equipment 40 can include base station and/or base station
Control device.
Fig. 5 shows the schematic flow sheet of the HARQ feedback method applied to terminal of the embodiment of the present invention.
As shown in figure 5, the HARQ feedback method applied to terminal according to embodiments of the present invention, specifically includes below scheme
Step：
Step 502, when using sTTI transmit data when, receive network side equipment descending sub frame sTTI n send it is descending
Data.
Step 504, when according to default processing delay on sub-frame of uplink sTTI n+k to the downlink data carry out HARQ
ACK/NACK feeds back, and when transmitting data using TTI by being switched to using sTTI transmission data, is arranged on and meets the default place
Manage and HARQ ACK/NACK feedbacks are carried out to the downlink data in first TTI subframe of time delay, wherein during the default processing
Prolong as k sTTI.
It is understood that when carrying out data interaction using the shorter sTTI transmission data of duration with network side equipment,
The downlink data that network side equipment is sent on descending sub frame sTTI n is received, and needs to complete on sub-frame of uplink sTTI n+k
To the HARQ ACK/NACK feedbacks (i.e. ACK feeds back or NACK feedbacks) of the downlink data, but when by transmitting data using sTTI
Switch to and data are transmitted using TTI, then can exist without HARQs of the corresponding sub-frame of uplink sTTI n+k as the downlink data
The situation of ACK/NACK feedback resources, thus ensure that smoothly complete it is anti-to the HARQ ACK/NACK of the downlink data
Feedback, to be effectively reduced HARQ feedback time delay, can specifically be passed in the satisfaction switched to after data are transmitted using TTI using sTTI
HARQ ACK/NACK feedbacks are carried out to the downlink data in first TTI subframe of HARQ feedback processing delay during transmission of data,
Wherein processing delay is k sTTI.
Further, in the above-described embodiments, k span is in the default processing delay：4≤k≤8, and k is
Integer；The descending sub frame sTTI n include 2 OFDM symbols or 3 OFDM symbols.
It is understood that being preferably greater than using the span of k in processing delay during sTTI transmission data
In 4 and integer less than or equal to 8, specific value is relevant with subframe sTTI duration；Further, it is shorter using duration
STTI transmission data when, subframe sTTI can include 2 OFDM symbols or 3 OFDM symbols, when by being passed using sTTI
Transmission of data is switched to transmits data using TTI, and terminal can not be completed to the network equipment under on sub-frame of uplink sTTI n+k
During the HARQ ACK/NACK feedbacks of the downlink data sent on row subframe sTTI n, data can be transmitted using sTTI meeting
When processing delay first TTI subframe on carry out HARQ ACK/NACK feedbacks, to reduce the expense of control signaling, improve
Spectrum efficiency.
Fig. 6 shows the schematic block diagram of the terminal of the embodiment of the present invention.
As shown in fig. 6, terminal 60 according to embodiments of the present invention, including：Transceiver, processor and memory.
Wherein, the transceiver is used to, when transmitting data using sTTI, receive network side equipment in descending sub frame sTTI
The downlink data that n is sent；The processor realizes following operate when being used to perform the computer program stored in the memory：
When according to default processing delay on sub-frame of uplink sTTI n+k to the downlink data carry out HARQ ACK/NACK feedbacks, and
When transmitting data using TTI by being switched to using sTTI transmission data, meet the default processing delay first is arranged on
HARQ ACK/NACK feedbacks are carried out to the downlink data in TTI subframes, wherein the default processing delay is k sTTI.
It is understood that when carrying out data interaction using the shorter sTTI transmission data of duration with network side equipment,
The downlink data that network side equipment is sent on descending sub frame sTTI n is received, and needs to complete on sub-frame of uplink sTTI n+k
To the HARQ ACK/NACK feedbacks (i.e. ACK feeds back or NACK feedbacks) of the downlink data, but when by transmitting data using sTTI
Switch to and data are transmitted using TTI, then can exist without HARQs of the corresponding sub-frame of uplink sTTI n+k as the downlink data
The situation of ACK/NACK feedback resources, thus ensure that smoothly complete it is anti-to the HARQ ACK/NACK of the downlink data
Feedback, to be effectively reduced HARQ feedback time delay, can specifically be passed in the satisfaction switched to after data are transmitted using TTI using sTTI
HARQ ACK/NACK feedbacks are carried out to the downlink data in first TTI subframe of HARQ feedback processing delay during transmission of data,
Wherein processing delay is k sTTI.
Further, in the above-described embodiments, k span is in the default processing delay：4≤k≤8, and k is
Integer；The descending sub frame sTTI n include 2 OFDM symbols or 3 OFDM symbols.
It is understood that being preferably greater than using the span of k in processing delay during sTTI transmission data
In 4 and integer less than or equal to 8, specific value is relevant with subframe sTTI duration；Further, it is shorter using duration
STTI transmission data when, subframe sTTI can include 2 OFDM symbols or 3 OFDM symbols, when by being passed using sTTI
Transmission of data is switched to transmits data using TTI, and terminal can not be completed to the network equipment under on sub-frame of uplink sTTI n+k
During the HARQ ACK/NACK feedbacks of the downlink data sent on row subframe sTTI n, data can be transmitted using sTTI meeting
When processing delay first TTI subframe on carry out HARQ ACK/NACK feedbacks, to reduce the expense of control signaling, improve
Spectrum efficiency.
With reference to a specific embodiment to the HARQ feedback scheme any one of the above embodiment of the present invention
Illustrate.
In this specific embodiment, reference picture 1, the k in 2 OFDM symbols, processing delay is included with a sTTI subframe
Illustrated exemplified by taking 6, then a length of 1ms duration of the TTI subframe equivalent to 7 sTTI subframes when.As shown in figure 1,
The data transmitted on subframe sTTI 2, in order to meet the processing delay requirement of k=6 namely 12 OFDM symbol duration, its HARQ
ACK/NACK feedbacks occur to use after TTI transmission data in first TTI subframe, i.e., by switching to using sTTI transmission data
On subframe TTI 8；And the data transmitted on subframe sTTI 3, its HARQ ACK/NACK, which feeds back, occur at 12
After OFDM symbol duration, subframe TTI 8 the 3rd OFDM symbol is corresponded to, and if in view of can not be the of subframe TTI 8
1 OFDM symbol is fed back, and postpones to next TTI subframes, therefore should be directed on subframe TTI 9 in subframe sTTI 3
The data of upper transmission carry out HARQ ACK/NACK feedbacks.Similarly, the data transmitted on subframe sTTI 4 to subframe sTTI 7,
Its HARQ ACK/NACK feedbacks occur on subframe TTI 9.
Further, any process described otherwise above in flow chart or herein or method description it is understood that
To represent to include the mould of the code of one or more executable instructions for the step of realizing specific logical function or process
Block, fragment or part, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not be by shown
Or the order discussed, including according to involved function by it is basic and meanwhile in the way of or in the opposite order, carry out perform function, this
It should be understood by embodiments of the invention person of ordinary skill in the field.
Represent in flow charts or logic and/or step described otherwise above herein, for example, being considered use
In the order list for the executable instruction for realizing logic function, it may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system including the system of processor or other can be held from instruction
The system of row system, device or equipment instruction fetch and execute instruction) use, or combine these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable recording medium " can any can be included, store, communicating, propagating
Or transmission procedure uses for instruction execution system, device or equipment or with reference to these instruction execution systems, device or equipment
Device.The more specifically example (non-exhaustive list) of computer-readable medium includes following：With one or more wirings
Electrical connection section (electronic installation), portable computer diskette box (magnetic device), random access memory (RAM), read-only storage
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device, and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, can even is that can be in the paper of printing described program thereon or other are suitable for computer-readable medium
Medium, because can then enter edlin, interpretation or if necessary with it for example by carrying out optical scanner to paper or other media
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each several part of the present invention can be realized with hardware, software, firmware or combinations thereof.Above-mentioned
In embodiment, the software that multiple steps or method can in memory and by suitable instruction execution system be performed with storage
Or firmware is realized.If, and in another embodiment, can be with well known in the art for example, realized with hardware
Any one of row technology or their combination are realized：With the logic gates for realizing logic function to data-signal
Discrete logic, the application specific integrated circuit with suitable combinational logic gate circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
Those skilled in the art are appreciated that to realize all or part of step that above-described embodiment method is carried
Rapid to can be by program to instruct the hardware of correlation to complete, described program can be stored in a kind of computer-readable storage medium
In matter, the program upon execution, including one or a combination set of the step of embodiment of the method.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing module, can also
That unit is individually physically present, can also two or more units be integrated in a module.Above-mentioned integrated mould
Block can both be realized in the form of hardware, it would however also be possible to employ the form of software function module is realized.The integrated module is such as
Fruit is realized using in the form of software function module and as independent production marketing or in use, can also be stored in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only storage, disk or CD etc..
Technical scheme is described in detail above in association with accompanying drawing, when by switching to use using sTTI transmission data
TTI transmits data, and unfinished sTTI HARQ progress feedbacks can be used meeting during for transmitting data using sTTI
In first TTI subframe of processing delay during sTTI transmission data, so as to be effectively reduced the time delay of HARQ feedback, carry
Spectral efficient.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. a kind of HARQ feedback method, it is adaptable to network side equipment, it is characterised in that the HARQ feedback method includes：
When transmitting data using sTTI, downlink data is sent to terminal on descending sub frame sTTI n, wherein the terminal pin
Processing delay to the HARQ ACK/NACK feedbacks of the downlink data is k sTTI；
Switched to when by transmitting data using sTTI using TTI transmission data, and the terminal can not be in sub-frame of uplink sTTI n+
When being completed on k to the HARQ ACK/NACK of downlink data feedback, configure the terminal and meeting the of the processing delay
HARQ ACK/NACK feedbacks are carried out to the downlink data in one TTI subframe.
2. HARQ feedback method according to claim 1, it is characterised in that k span is in the processing delay：
4≤k≤8, and k is integer.
3. HARQ feedback method according to claim 1 or 2, it is characterised in that the descending sub frame sTTI n include 2
OFDM symbol or 3 OFDM symbols.
4. a kind of HARQ feedback method, it is adaptable to terminal, it is characterised in that the HARQ feedback method includes：
When transmitting data using sTTI, the downlink data that network side equipment is sent in descending sub frame sTTI n is received；
When according to default processing delay on sub-frame of uplink sTTI n+k to the downlink data carry out HARQACK/NACK feedbacks,
And when transmitting data using TTI by being switched to using sTTI transmission data, be arranged on and meet the first of the default processing delay
HARQACK/NACK feedbacks are carried out to the downlink data in individual TTI subframes, wherein the default processing delay is k sTTI.
5. HARQ feedback method according to claim 4, it is characterised in that
K span is in the default processing delay：4≤k≤8, and k is integer；
The descending sub frame sTTI n include 2 OFDM symbols or 3 OFDM symbols.
6. a kind of HARQ feedback device, it is adaptable to network side equipment, it is characterised in that the HARQ feedback device includes：
Sending module, for when transmitting data using sTTI, downlink data to be sent to terminal on descending sub frame sTTI n, its
Described in terminal for the HARQ ACK/NACK of the downlink data processing delay fed back be k sTTI；
Configuration module, for being switched to when by transmitting data using sTTI using TTI transmission data, and the terminal can not be upper
When the HARQACK/NACK feedbacks to the downlink data are completed on row subframe sTTI n+k, configure the terminal and meeting described
HARQ ACK/NACK feedbacks are carried out to the downlink data in first TTI subframe of processing delay.
7. HARQ feedback device according to claim 6, it is characterised in that
K span is in the processing delay：4≤k≤8, and k is integer；
The descending sub frame sTTI n include 2 OFDM symbols or 3 OFDM symbols.
8. a kind of network side equipment, it is characterised in that including：HARQ feedback device as claimed in claims 6 or 7.
9. a kind of terminal, it is characterised in that the terminal includes：
Transceiver, for when using sTTI transmit data when, receive network side equipment descending sub frame sTTI n send it is descending
Data；
Processor and memory, the processor realize following grasp when being used to perform the computer program stored in the memory
Make：When according to default processing delay on sub-frame of uplink sTTI n+k to the downlink data carry out HARQ ACK/NACK feedbacks,
And when transmitting data using TTI by being switched to using sTTI transmission data, be arranged on and meet the first of the default processing delay
HARQ ACK/NACK feedbacks are carried out to the downlink data in individual TTI subframes, wherein the default processing delay is k sTTI.
10. terminal according to claim 9, it is characterised in that
K span is in the default processing delay：4≤k≤8, and k is integer；
The descending sub frame sTTI n include 2 OFDM symbols or 3 OFDM symbols.
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