CN106230565A - HARQ feedback method and device, base station - Google Patents
HARQ feedback method and device, base station Download PDFInfo
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- CN106230565A CN106230565A CN201610551068.8A CN201610551068A CN106230565A CN 106230565 A CN106230565 A CN 106230565A CN 201610551068 A CN201610551068 A CN 201610551068A CN 106230565 A CN106230565 A CN 106230565A
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- ofdm symbol
- time slot
- uplink pilot
- pilot time
- 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
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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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
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1864—ARQ related signaling
-
- 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
-
- 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
-
- 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
- H04L5/0058—Allocation criteria
- H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
Abstract
The present invention proposes a kind of HARQ feedback method, HARQ feedback device and base station, and wherein, described HARQ feedback method includes: in a tdd system, and in configuration special subframe, the number of the OFDM symbol that uplink pilot time slot takies is the integer more than or equal to 3；The OFDM symbol taken by described uplink pilot time slot transmits the HARQ ACK for downlink data or NACK feedback information.By technical scheme, HARQ feedback time delay can be effectively reduced, thus reduce minimizing downlink user face data delay, promote Consumer's Experience.
Description
Technical field
The present invention relates to communication technical field, in particular to a kind of HARQ feedback method, a kind of HARQ feedback device
With a kind of base station.
Background technology
At present, along with the development of mobile Internet, the applied business meeting various specific function in a large number has been emerged.Wherein
Some business are relatively low to data delay requirement, such as receiving and dispatching mail, download movies；But additionally there are some business to data delay
Having strict requirements, such as network on-line is played, rushes to purchase, is robbed red packet etc., and this kind of business is usually required the time delay of user data
The shortest.For LTE (Long Term Evolution, Long Term Evolution) TDD (Time Division Duplexing,
Time division duplex) system, in its each sub-frame configuration, the quantitative relation of up-downgoing resource and sequential relationship are to downlink user face time delay
Have a major impact.In working standard, the LTE TDD sub-frame configuration of regulation has 7 kinds, as shown in Figure 1.Include at a tdd frame
Descending sub frame (D), sub-frame of uplink (U) and special subframe (S), wherein special subframe is by DwPTS (Downlink Pilot Time
Slot, descending pilot frequency time slot/GP (Guard Period, protection interval)/UpPTS (Uplink Pilot Time Slot, up
Pilot time slot) three special time slots constitute, as shown in Figure 2.One special subframe as downlink and uplink subframe, time a length of
1ms, is accorded with by 14 OFDM (Orthogonal Frequency Division Multiplexing, orthogonal frequency division multiplexi)
Number constitute (in the case of general cyclic prefix) or 12 OFDM symbol constitute (in the case of extended cyclic prefix).DwPTS occupies
Symbolic number more, may be used for the transmission of Downlink Control Information or data message；GP is protection interval, with the radius of community
Relevant, it is not used in transmission data；It is less that UpPTS takies symbol, only takes up 1 or 2 OFDM symbol, when uplink
It is served only for transmitting SRS (Sounding Reference Signal, Sounding Reference Signal) and PRACH (Physical
Random Access Channel, Physical Random Access Channel), in Current standards, special subframe is configured with 8 kinds, such as Fig. 3 institute
Show.
Under the TDD sub-frame configuration that some descending sub frame is more, descending HARQ (Hybrid Automatic Repeat
Request, hybrid automatic repeat-request) time interval fed back is long.As a example by TDD sub-frame configuration 4 (with reference to Fig. 1), existing
The descending HARQ feedback time in standard is designed as shown in Figure 4.
It can be seen from figure 4 that in TDD sub-frame configuration 4, be sent to ascending HARQ ACK from downlink data
When (Acknowledgement confirms response) or NACK (Negative Acknowledgement, negative response) feedback maximum
Between interval be 12ms, will just to carry out ACK or NACK to the subframe 2 of next frame anti-for the downlink data i.e. sent from present frame subframe 0
Feedback.It practice, data receiver and decoding process time delay are generally below 3ms in LTE TDD system, say, that after data send
4ms can carry out HARQ ACK/NACK feedback.But because in TDD, ascending HARQ ACK or NACK feedback to wait until sometimes
Between the interval sub-frame of uplink more than 4ms just can carry out, and up less in some TDD sub-frame configuration, can be used for feeding back HARQ
The chance of ACK or NACK is less, and the time delay which results in HARQ feedback is longer, thus have impact on downlink user face time delay.
Therefore, in a tdd system, how to reduce HARQ feedback time delay, thus reduce minimizing downlink user face data delay
Method.
Summary of the invention
The present invention is based on the problems referred to above, it is proposed that a kind of new technical scheme, by using improvement in a tdd system
, the special subframe that the number of OFDM symbol shared by uplink pilot time slot increases, when can be effectively reduced HARQ feedback
Prolong, thus reduce minimizing downlink user face data delay, promote Consumer's Experience.
In view of this, first aspect of the present invention it is proposed a kind of HARQ feedback method, including: in a tdd system, join
The number putting the OFDM symbol that uplink pilot time slot in special subframe takies is the integer more than or equal to 3；By described up
The OFDM symbol that pilot time slot takies transmits the HARQ ACK for downlink data or NACK feedback information.
In this technical scheme, by configuring in a tdd system, make in special subframe shared by uplink pilot time slot
The number of OFDM symbol be the integer more than or equal to 3, and then realize being accorded with by the OFDM shared by this uplink pilot time slot
Number transmission is for the HARQ ACK of downlink data or NACK feedback information, with in reduction system during the HARQ feedback of downlink data
Prolong, thus reduce user plane time delay, promote Consumer's Experience.
In technique scheme, it is preferable that the described OFDM symbol transmission pin taken by described uplink pilot time slot
HARQ feedback information to downlink data, specifically includes: by all OFDM symbol that described uplink pilot time slot takies
Rear N number of reserved OFDM symbol transmission SRS signal or PRACH signal, and by described all OFDM symbol are reserved except described
Other OFDM symbol outside OFDM symbol transmit the HARQ ACK for downlink data or NACK feedback information, wherein, the value of N
It is 1 or 2.
In this technical scheme, the number of OFDM symbol taken when uplink pilot time slot in configuration special subframe is for being more than
Or during integer equal to 3, on the one hand can rear N number of as pre-using in all OFDM symbol shared by this uplink pilot time slot
Staying OFDM symbol, to be specifically used to transmit SRS signal or PRACH signal, wherein N can be taken as 1 or 2, then remove reserved OFDM
Other OFDM symbol remaining of outer symbol i.e. can be used for transmitting the HARQ ACK for downlink data or NACK feedback information, real
The fixing OFDM symbol now taken by uplink pilot time slot transmits the HARQ ACK for downlink data or NACK feedback letter
Breath, i.e. in spite of needing to remain for the most in advance transmitting SRS signal or the OFDM symbol of PRACH signal.
In technique scheme, it is preferable that the described OFDM symbol transmission pin taken by described uplink pilot time slot
HARQ feedback information to downlink data, specifically includes: judge whether on described uplink pilot time slot transmit SRS signal or
PRACH signal；According to judged result determine in all OFDM symbol that described uplink pilot time slot takies for transmission under
The HARQ ACK of row data or the OFDM symbol of NACK feedback information.
In this technical scheme, the number of OFDM symbol taken when uplink pilot time slot in configuration special subframe is for being more than
Or when being equal to the integer of 3, on the other hand can be according to whether use the OFDM symbol shared by this uplink pilot time slot to pass
The actual demand of defeated SRS signal or PRACH signal is determined to for transmitting HARQ ACK or NACK for downlink data
The OFDM symbol resource of feedback information, so, makes the distribution of the OFDM symbol shared by uplink pilot time slot becomes cleverer
Live, to improve resource utilization further.
In technique scheme, it is preferable that described determine the institute that described uplink pilot time slot takies according to judged result
Have in OFDM symbol for transmitting the OFDM symbol of HARQ ACK or NACK for downlink data, specifically include: when judging to exist
When transmitting described SRS signal or PRACH signal on described uplink pilot time slot, by owning that described uplink pilot time slot takies
Rear N number of reserved OFDM symbol in OFDM symbol transmits described SRS signal or PRACH signal, and by described all OFDM
In symbol, the transmission of other OFDM symbol in addition to described reserved OFDM symbol is fed back for HARQ ACK or NACK of downlink data
Information, wherein, the value of N is 1 or 2；When judging not transmit described SRS signal or PRACH letter on described uplink pilot time slot
Number time, all OFDM symbol transmission taken by described uplink pilot time slot is anti-for HARQ ACK or NACK of downlink data
Feedforward information.
In this technical scheme, in judgement needs use special subframe, the OFDM symbol shared by uplink pilot time slot passes
Defeated SRS signal or PRACH signal, when i.e. having the business demand of transmission SRS signal or PRACH signal, can be by this ascending pilot frequency
OFDM symbol is reserved in the rear N number of conduct in all OFDM symbol shared by time slot, be specifically used to transmit SRS signal or
PRACH signal, wherein N can be taken as 1 or 2, then other OFDM symbol remaining removed outside reserved OFDM symbol i.e. can be used for
Transmit the HARQ ACK for downlink data or NACK feedback information, realize SRS signal or PRACH signal, HARQ the most simultaneously
The transmission of ACK or NACK feedback information.
And when the OFDM symbol transmission SRS signal judged to need not to use in special subframe shared by uplink pilot time slot or
PRACH signal, when the most not transmitting the business demand of SRS signal or PRACH signal, then can take this uplink pilot time slot
All OFDM symbol be used to transmit for the HARQ ACK of downlink data or NACK feedback information, enter making full use of resource
One step reduces HARQ feedback time delay, thus reduces minimizing downlink user face data delay, promotes Consumer's Experience.
A second aspect of the present invention, it is proposed that a kind of HARQ feedback device, including: configuration module, in TDD system
In, in configuration special subframe, the number of the OFDM symbol that uplink pilot time slot takies is the integer more than or equal to 3；Control mould
Block, transmits HARQ ACK or NACK for downlink data for the OFDM symbol controlled by described uplink pilot time slot takies
Feedback information.
In this technical scheme, by configuring in a tdd system, make in special subframe shared by uplink pilot time slot
The number of OFDM symbol more than or equal to 3, and then realize transmitting pin by the OFDM symbol shared by this uplink pilot time slot
HARQ ACK or NACK feedback information to downlink data, with the HARQ feedback time delay of downlink data in reduction system, thus drops
Low user plane time delay, promotes Consumer's Experience.
In technique scheme, it is preferable that described control module specifically for: control by described uplink pilot time slot
Rear N number of reserved OFDM symbol transmission SRS signal in all OFDM symbol taken or PRACH signal, and by described institute
Have in OFDM symbol in addition to described reserved OFDM symbol other OFDM symbol transmission for downlink data HARQ ACK or
NACK feedback information, wherein, the value of N is 1 or 2.
In this technical scheme, the number of OFDM symbol taken when uplink pilot time slot in configuration special subframe is for being more than
Or during integer equal to 3, on the one hand can rear N number of as pre-using in all OFDM symbol shared by this uplink pilot time slot
Staying OFDM symbol, to be specifically used to transmit SRS signal or PRACH signal, wherein N can be taken as 1 or 2, then remove reserved OFDM
Other OFDM symbol remaining of outer symbol i.e. can be used for transmitting the HARQ ACK for downlink data or NACK feedback information, real
The fixing OFDM symbol now taken by uplink pilot time slot transmits the HARQ ACK for downlink data or NACK feedback letter
Breath.
In technique scheme, it is preferable that described control module specifically includes: judge submodule, it is used for judging whether
Described uplink pilot time slot transmits SRS signal or PRACH signal；Determine submodule, for according to described judge module
Judged result determines in all OFDM symbol that described uplink pilot time slot takies for transmitting the HARQ for downlink data
The OFDM symbol of ACK or NACK.
In this technical scheme, the number of OFDM symbol taken when uplink pilot time slot in configuration special subframe is for being more than
Or when being equal to the integer of 3, on the other hand can be according to whether use the OFDM symbol shared by this uplink pilot time slot to pass
The actual demand of defeated SRS signal or PRACH signal is determined to for transmitting HARQ ACK or NACK for downlink data
The OFDM symbol resource of feedback information, so, makes the distribution of the OFDM symbol shared by uplink pilot time slot becomes cleverer
Live, to improve resource utilization further.
In any of the above-described technical scheme, it is preferable that described determine submodule specifically for: when judging up to lead described
When frequently transmitting described SRS signal or PRACH signal on time slot, by all OFDM symbol that described uplink pilot time slot takies
Rear N number of reserved OFDM symbol transmit described SRS signal or PRACH signal, and by described all OFDM symbol are removed institute
State other OFDM symbol outside reserved OFDM symbol and transmit the HARQ ACK for downlink data or NACK feedback information, wherein, N
Value be 1 or 2；When described judgement submodule judges not transmit described SRS signal or PRACH on described uplink pilot time slot
During signal, all OFDM symbol taken by described uplink pilot time slot transmit HARQ ACK or NACK for downlink data
Feedback information.
In this technical scheme, in judgement needs use special subframe, the OFDM symbol shared by uplink pilot time slot passes
Defeated SRS signal or PRACH signal, when i.e. having the business demand of transmission SRS signal or PRACH signal, can be by this ascending pilot frequency
OFDM symbol is reserved in the rear N number of conduct in all OFDM symbol shared by time slot, be specifically used to transmit SRS signal or
PRACH signal, wherein N can be taken as 1 or 2, then other OFDM symbol remaining removed outside reserved OFDM symbol i.e. can be used for
Transmit the HARQ ACK for downlink data or NACK feedback information, realize SRS signal or PRACH signal, HARQ the most simultaneously
The transmission of ACK or NACK feedback information.
And when the OFDM symbol transmission SRS signal judged to need not to use in special subframe shared by uplink pilot time slot or
PRACH signal, when the most not transmitting the business demand of SRS signal or PRACH signal, then can take this uplink pilot time slot
All OFDM symbol be used to transmit for the HARQ ACK of downlink data or NACK feedback information, enter making full use of resource
One step reduces HARQ feedback time delay, thus reduces minimizing downlink user face data delay, promotes Consumer's Experience.
A third aspect of the present invention, it is proposed that a kind of base station, including: the HARQ as according to any one of technique scheme
Feedback device, therefore, this base station has all useful effect of the HARQ feedback device as according to any one of technique scheme
Really, do not repeat them here.
Technical scheme, by using the OFDM shared by improvement, uplink pilot time slot to accord with in a tdd system
Number the special subframe that increases of number, HARQ feedback time delay can be effectively reduced, thus reduce minimizing downlink user face data
Time delay, promotes Consumer's Experience.
Accompanying drawing explanation
Fig. 1 shows tdd frame structure allocation list in the LTE system in correlation technique；
Fig. 2 shows the composition schematic diagram of the special subframe in correlation technique；
Fig. 3 shows the allocation list of the special subframe in correlation technique；
Fig. 4 shows the descending HARQ feedback time diagram in correlation technique；
Fig. 5 shows the schematic flow sheet of HARQ feedback method according to an embodiment of the invention；
Fig. 6 show taken by uplink pilot time slot according to an embodiment of the invention OFDM symbol transmission under
The method flow schematic diagram of the HARQ feedback information of row data；
Fig. 7 shows the most descending HARQ feedback time diagram；
Fig. 8 shows the schematic block diagram of HARQ feedback device according to an embodiment of the invention；
Fig. 9 shows the schematic block diagram of control module according to an embodiment of the invention；
Figure 10 shows the schematic block diagram of base station according to an embodiment of the invention.
Detailed description of the invention
In order to the above-mentioned purpose of the present invention, feature and advantage can be more clearly understood that, real with concrete below in conjunction with the accompanying drawings
The present invention is further described in detail by mode of executing.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 detail in the following description so that fully understanding the present invention, but, the present invention also may be used
Implementing to use other to be different from other modes described here, therefore, protection scope of the present invention is not by described below
The restriction of specific embodiment.
Fig. 5 shows the schematic flow sheet of HARQ feedback method according to an embodiment of the invention.
As it is shown in figure 5, HARQ feedback method according to an embodiment of the invention, including below scheme step:
Step 502, in a tdd system, in configuration special subframe, the number of the OFDM symbol that uplink pilot time slot takies is
Integer more than or equal to 3.
Step 504, the OFDM symbol taken by described uplink pilot time slot transmits the HARQ ACK for downlink data
Or NACK feedback information.
In this technical scheme, by configuring in a tdd system, make in special subframe shared by uplink pilot time slot
The number of OFDM symbol be the integer more than or equal to 3, and then realize being accorded with by the OFDM shared by this uplink pilot time slot
Number transmission is for the HARQ ACK of downlink data or NACK feedback information, with in reduction system during the HARQ feedback of downlink data
Prolong, thus reduce user plane time delay, promote Consumer's Experience.
It is possible to further realize the technical scheme described in step 504 by following two embodiment.
Embodiment one: by the rear N number of reserved OFDM symbol in all OFDM symbol that described uplink pilot time slot takies
Transmission SRS signal or PRACH signal, and by other in addition to described reserved OFDM symbol in described all OFDM symbol
OFDM symbol transmits the HARQ ACK for downlink data or NACK feedback information, and wherein, the value of N is 1 or 2.
In this technical scheme, the number of OFDM symbol taken when uplink pilot time slot in configuration special subframe is for being more than
Or during integer equal to 3, on the one hand can rear N number of as pre-using in all OFDM symbol shared by this uplink pilot time slot
Staying OFDM symbol, to be specifically used to transmit SRS signal or PRACH signal, wherein N can be taken as 1 or 2, then remove reserved OFDM
Other OFDM symbol remaining of outer symbol i.e. can be used for transmitting the HARQ ACK for downlink data or NACK feedback information, real
The fixing OFDM symbol now taken by uplink pilot time slot transmits the HARQ ACK for downlink data or NACK feedback letter
Breath, i.e. in spite of needing to remain for the most in advance transmitting SRS signal or the OFDM symbol of PRACH signal.
Embodiment two, as shown in Figure 6, specifically includes:
Step 5042, it may be judged whether transmit SRS signal or PRACH signal on described uplink pilot time slot.
Step 5044, determines in all OFDM symbol that described uplink pilot time slot takies for transmitting according to judged result
HARQ ACK or the OFDM symbol of NACK feedback information for downlink data.
In this technical scheme, the number of OFDM symbol taken when uplink pilot time slot in configuration special subframe is for being more than
Or when being equal to the integer of 3, on the other hand can be according to whether use the OFDM symbol shared by this uplink pilot time slot to pass
The actual demand of defeated SRS signal or PRACH signal is determined to for transmitting HARQ ACK or NACK for downlink data
The OFDM symbol resource of feedback information, so, makes the distribution of the OFDM symbol shared by uplink pilot time slot becomes cleverer
Live, to improve resource utilization further.
Further, when the judged result of above-mentioned steps 5042 is for being, above-mentioned steps 5044 specifically includes: by described
Rear N number of reserved OFDM symbol in all OFDM symbol that uplink pilot time slot takies transmits described SRS signal or PRACH letter
Number, and transmitted for lower line number by other OFDM symbol in addition to described reserved OFDM symbol in described all OFDM symbol
According to HARQ ACK or NACK feedback information, wherein, the value of N is 1 or 2.
In this technical scheme, in judgement needs use special subframe, the OFDM symbol shared by uplink pilot time slot passes
Defeated SRS signal or PRACH signal, when i.e. having the business demand of transmission SRS signal or PRACH signal, can be by this ascending pilot frequency
OFDM symbol is reserved in the rear N number of conduct in all OFDM symbol shared by time slot, be specifically used to transmit SRS signal or
PRACH signal, wherein N can be taken as 1 or 2, then other OFDM symbol remaining removed outside reserved OFDM symbol i.e. can be used for
Transmit the HARQ ACK for downlink data or NACK feedback information, realize SRS signal or PRACH signal, HARQ the most simultaneously
The transmission of ACK or NACK feedback information.
And when the judged result of above-mentioned steps 5042 is no, above-mentioned steps 5044 specifically includes: up led by described
Frequently all OFDM symbol of Time Slot Occupancy transmit the HARQ ACK for downlink data or NACK feedback information.
In this technical scheme, when judging to need not to use in special subframe the OFDM symbol shared by uplink pilot time slot
Transmission SRS signal or PRACH signal, when the most not transmitting the business demand of SRS signal or PRACH signal, then can be by this
All OFDM symbol that row pilot time slot takies are used to transmit the HARQ ACK for downlink data or NACK feedback information, with
Make full use of resource and reduce HARQ feedback time delay further, thus reduce minimizing downlink user face data delay, promote user's body
Test.
Below in conjunction with the descending HARQ feedback sequential of the embodiments of the invention shown in Fig. 7, to technical scheme
It is described in detail.
As it is shown in fig. 7, use the special subframe of improvement in LTE TDD system, up in the special subframe of this improvement
The number of the OFDM symbol shared by pilot time slot is at least 3 and is integer, wherein, shared by this uplink pilot time slot
OFDM symbol is useful for HARQ ACK or the NACK feedback information of downlink data, i.e. leads in the up of special subframe improved
Frequently time slot is in addition to can transmitting SRS signal or PRACH signal, it is also possible to transmit HARQ ACK or NACK for downlink data
Feedback information, adds and carries out uplink HARQ feedback chance；Then after using the special subframe improved, maximum HARQ ACK
Or NACK feedback interval is 11ms (present frame subframe 0 sends downlink data, next frame subframe 1 feeding back ACK/NACK), and
There is the downlink data HARQ feedback time delay of transmission in 3 subframes (subframe 0/1/4) all to shorten 1ms, i.e. shorten HARQ feedback
Time delay, thus reduces user plane time delay.
Fig. 8 shows the schematic block diagram of HARQ feedback device according to an embodiment of the invention.
As shown in Figure 8, HARQ feedback device 800 according to an embodiment of the invention, including: configuration module 802 and control
Module 804.
Wherein, configure module 802, in a tdd system, configure the OFDM that in special subframe, uplink pilot time slot takies
The number of symbol is the integer more than or equal to 3；Control module 804, is taken by described uplink pilot time slot for control
OFDM symbol transmits the HARQ ACK for downlink data or NACK feedback information.
In this technical scheme, by configuring in a tdd system, make in special subframe shared by uplink pilot time slot
The number of OFDM symbol more than or equal to 3, and then realize transmitting pin by the OFDM symbol shared by this uplink pilot time slot
HARQ ACK or NACK feedback information to downlink data, with the HARQ feedback time delay of downlink data in reduction system, thus drops
Low user plane time delay, promotes Consumer's Experience.
Further, the most described control module 804 specifically for: control to be taken by described uplink pilot time slot
Rear N number of reserved OFDM symbol transmission SRS signal in all OFDM symbol or PRACH signal, and by described all OFDM
In symbol, the transmission of other OFDM symbol in addition to described reserved OFDM symbol is fed back for HARQ ACK or NACK of downlink data
Information, wherein, the value of N is 1 or 2.
In this technical scheme, the number of OFDM symbol taken when uplink pilot time slot in configuration special subframe is for being more than
Or during integer equal to 3, on the one hand can rear N number of as pre-using in all OFDM symbol shared by this uplink pilot time slot
Staying OFDM symbol, to be specifically used to transmit SRS signal or PRACH signal, wherein N can be taken as 1 or 2, then remove reserved OFDM
Other OFDM symbol remaining of outer symbol i.e. can be used for transmitting the HARQ ACK for downlink data or NACK feedback information, real
The fixing OFDM symbol now taken by uplink pilot time slot transmits the HARQ ACK for downlink data or NACK feedback letter
Breath.
Further, as it is shown in figure 9, the described control module 804 of another aspect specifically includes: judge that submodule 8042 is with true
Stator modules 8044.
Wherein, it is judged that submodule 8042, be used for judging whether on described uplink pilot time slot transmitting SRS signal or
PRACH signal；Determine submodule 8044, for determining that described uplink pilot time slot accounts for according to the judged result of described judge module
All OFDM symbol in for transmission for the OFDM symbol of HARQ ACK or NACK of downlink data.
In this technical scheme, the number of OFDM symbol taken when uplink pilot time slot in configuration special subframe is for being more than
Or when being equal to the integer of 3, on the other hand can be according to whether use the OFDM symbol shared by this uplink pilot time slot to pass
The actual demand of defeated SRS signal or PRACH signal is determined to for transmitting HARQ ACK or NACK for downlink data
The OFDM symbol resource of feedback information, so, makes the distribution of the OFDM symbol shared by uplink pilot time slot becomes cleverer
Live, to improve resource utilization further.
Further, described determine submodule 8044 specifically for: when judge on described uplink pilot time slot transmit institute
When stating SRS signal or PRACH signal, rear N number of reserved by all OFDM symbol that described uplink pilot time slot takies
OFDM symbol transmits described SRS signal or PRACH signal, and by described all OFDM symbol accord with except described reserved OFDM
Other OFDM symbol transmission of extra is for the HARQ ACK of downlink data or NACK feedback information, wherein, the value of N be 1 or
2；When described judgement submodule 8042 judges not transmit described SRS signal or PRACH signal on described uplink pilot time slot,
The all OFDM symbol taken by described uplink pilot time slot transmit the HARQ ACK for downlink data or NACK feedback letter
Breath.
In this technical scheme, in judgement needs use special subframe, the OFDM symbol shared by uplink pilot time slot passes
Defeated SRS signal or PRACH signal, when i.e. having the business demand of transmission SRS signal or PRACH signal, can be by this ascending pilot frequency
OFDM symbol is reserved in the rear N number of conduct in all OFDM symbol shared by time slot, be specifically used to transmit SRS signal or
PRACH signal, wherein N can be taken as 1 or 2, then other OFDM symbol remaining removed outside reserved OFDM symbol i.e. can be used for
Transmit the HARQ ACK for downlink data or NACK feedback information, realize SRS signal or PRACH signal, HARQ the most simultaneously
The transmission of ACK or NACK feedback information.
And when the OFDM symbol transmission SRS signal judged to need not to use in special subframe shared by uplink pilot time slot or
PRACH signal, when the most not transmitting the business demand of SRS signal or PRACH signal, then can take this uplink pilot time slot
All OFDM symbol be used to transmit for the HARQ ACK of downlink data or NACK feedback information, enter making full use of resource
One step reduces HARQ feedback time delay, thus reduces minimizing downlink user face data delay, promotes Consumer's Experience.
In figs. 8 and 9, configuration module 802 and control module 804 can be CPU (Central
Processing Unit, CPU), microprocessor or digital signal processor (Digital Signal Processor, DSP).
Figure 10 shows the schematic block diagram of base station according to an embodiment of the invention.
As shown in Figure 10, base station 1000 according to an embodiment of the invention, including: institute as any one of technique scheme
The HARQ feedback device 800 stated, therefore, this base station 1000 has the HARQ feedback dress as according to any one of technique scheme
Put all beneficial effects of 800, do not repeat them here.
Technical scheme is described in detail above in association with accompanying drawing, by use in a tdd system improvement, up
The special subframe that the number of the OFDM symbol shared by pilot time slot increases, can be effectively reduced HARQ feedback time delay, thus
Reduce and reduce downlink user face data delay, promote Consumer's Experience.
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, that is made any repaiies
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (9)
1. a HARQ feedback method, it is characterised in that including:
In a tdd system, in configuration special subframe, the number of the OFDM symbol that uplink pilot time slot takies is more than or equal to 3
Integer；
The OFDM symbol taken by described uplink pilot time slot transmits the HARQ ACK for downlink data or NACK feedback letter
Breath.
HARQ feedback method the most according to claim 1, it is characterised in that described taken by described uplink pilot time slot
OFDM symbol transmission for the HARQ feedback information of downlink data, specifically include:
By rear N number of reserved OFDM symbol in all OFDM symbol that described uplink pilot time slot takies transmit SRS signal or
PRACH signal, and by the transmission of other OFDM symbol in addition to described reserved OFDM symbol pin in described all OFDM symbol
HARQ ACK or NACK feedback information to downlink data, wherein, the value of N is 1 or 2.
HARQ feedback method the most according to claim 1, it is characterised in that described taken by described uplink pilot time slot
OFDM symbol transmission for the HARQ feedback information of downlink data, specifically include:
Judge whether to transmit SRS signal or PRACH signal on described uplink pilot time slot；
Determine in all OFDM symbol that described uplink pilot time slot takies for transmitting for downlink data according to judged result
HARQ ACK or the OFDM symbol of NACK feedback information.
HARQ feedback method the most according to claim 3, it is characterised in that described determine according to judged result described up
For transmission for the HARQ ACK of downlink data or NACK feedback information in all OFDM symbol that pilot time slot takies
OFDM symbol, specifically includes:
When judging to transmit described SRS signal or PRACH signal on described uplink pilot time slot, during by described ascending pilot frequency
Rear N number of reserved OFDM symbol in all OFDM symbol that gap takies transmits described SRS signal or PRACH signal, and passes through
In described all OFDM symbol, the transmission of other OFDM symbol in addition to described reserved OFDM symbol is for the HARQ of downlink data
ACK or NACK feedback information, wherein, the value of N is 1 or 2；
When judging not transmit described SRS signal or PRACH signal on described uplink pilot time slot, by described ascending pilot frequency
All OFDM symbol of Time Slot Occupancy transmit the HARQ ACK for downlink data or NACK feedback information.
5. a HARQ feedback device, it is characterised in that including:
Configuration module, in a tdd system, in configuration special subframe, the number of the OFDM symbol that uplink pilot time slot takies is
Integer more than or equal to 3；
Control module, transmits the HARQ for downlink data for the OFDM symbol controlled by described uplink pilot time slot takies
ACK or NACK feedback information.
HARQ feedback device the most according to claim 5, it is characterised in that described control module specifically for:
The rear N number of reserved OFDM symbol transmission SRS controlled in all OFDM symbol taken by described uplink pilot time slot is believed
Number or PRACH signal, and passed by other OFDM symbol in addition to described reserved OFDM symbol in described all OFDM symbol
The defeated HARQ ACK for downlink data or NACK feedback information, wherein, the value of N is 1 or 2.
HARQ feedback device the most according to claim 5, it is characterised in that described control module specifically includes:
Judge submodule, be used for judging whether to transmit SRS signal or PRACH signal on described uplink pilot time slot；
Determine submodule, all for determining that described uplink pilot time slot takies according to the judged result of described judge module
For transmitting the HARQ ACK for downlink data or the OFDM symbol of NACK feedback information in OFDM symbol.
HARQ feedback device the most according to claim 7, it is characterised in that described determine submodule specifically for:
When judging to transmit described SRS signal or PRACH signal on described uplink pilot time slot, during by described ascending pilot frequency
Rear N number of reserved OFDM symbol in all OFDM symbol that gap takies transmits described SRS signal or PRACH signal, and passes through
In described all OFDM symbol, the transmission of other OFDM symbol in addition to described reserved OFDM symbol is for the HARQ of downlink data
ACK or NACK feedback information, wherein, the value of N is 1 or 2；
When described judgement submodule judges not transmit described SRS signal or PRACH signal on described uplink pilot time slot, logical
Cross all OFDM symbol transmission that described uplink pilot time slot takies for the HARQ ACK of downlink data or NACK feedback information.
9. a base station, it is characterised in that including: the HARQ feedback device as according to any one of claim 5 to 8.
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| CN101388755A (en) * | 2007-09-11 | 2009-03-18 | 大唐移动通信设备有限公司 | Uni-cell MBMS data retransmission scheduling method, device, system and base station |
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