CN106059739B - HARQ feedback method, HARQ feedback device, base station and terminal - Google Patents

HARQ feedback method, HARQ feedback device, base station and terminal Download PDF

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Publication number
CN106059739B
CN106059739B CN201610569191.2A CN201610569191A CN106059739B CN 106059739 B CN106059739 B CN 106059739B CN 201610569191 A CN201610569191 A CN 201610569191A CN 106059739 B CN106059739 B CN 106059739B
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special subframe
harq feedback
frame
ofdm symbol
harq
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CN106059739A (en
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不公告发明人
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Meizu Technology Co Ltd
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Meizu Technology Co Ltd
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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
    • 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]
    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention provides a kind of HARQ feedback method, HARQ feedback device, base station and terminals, HARQ feedback method includes: in tdd frame, special subframe is configured to substitute at least one sub-frame of uplink in the tdd frame, wherein the special subframe includes downlink resource part；HARQ ACK or the NACK feedback information of upstream data is directed to terminal transmission by the downlink resource part in the special subframe.According to the technical solution of the present invention, at least one sub-frame of uplink in tdd frame is substituted by configuring special subframe, and HARQ ACK or the NACK feedback information for upstream data based on the downlink resource fractional transmission in special subframe, increase more progress downlink HARQ feedback chances, HARQ feedback time delay is shortened, to reduce uplink user face time delay.

Description

HARQ feedback method, HARQ feedback device, base station and terminal
Technical field
The present invention relates to fields of communication technology, fill in particular to a kind of HARQ feedback method, a kind of HARQ feedback It sets, a kind of base station and a kind of terminal.
Background technique
With the development of mobile internet, the applied business for largely meeting various specific functions has been emerged.Wherein, some Business is lower to data delay requirement, such as receiving and dispatching mail, downloading film etc.；But separately there are some business to have strictly data delay Requirement, such as network on-line game, rush to purchase, rob red packet etc., the time delay that this kind of business is usually required user data to the greatest extent may be used Can it is short, for LTE (Long Term Evolution, long term evolution) TDD (Time Division Duplexing, when Point duplex) system, influence uplink user face time delay a factor be under the more TDD sub-frame configuration of certain sub-frame of uplink, The time interval of ascending HARQ (Hybrid Automatic Repeat reQuest, hybrid automatic repeat-request) feedback is too long. By taking TDD sub-frame configuration 0 as an example, the uplink HARQ feedback time design in current standard is as shown in Figure 1.
It will be noted from fig. 1 that it is anti-to be sent to downlink HARQ ACK/NACK from upstream data in TDD sub-frame configuration 0 Feedback maximum time interval is that (subframe 0 that the upstream data that present frame subframe 3 is sent will arrive next frame just carries out ACK/NACK to 7ms Feedback).In fact, data receiver and decoding process time delay are generally below 3ms in LTE TDD system, that is to say, that sent out in data 4ms can carry out HARQ ACK/NACK feedback after sending.But because in a tdd system, for the HARQ ACK/ of downlink data NACK feedback will be more than that the downlink subframe of 4ms just can be carried out until having time interval, and in some TDD sub-frame configurations downlink compared with It is few, and ascending-descending subframes have fixed sequential relationship.Which results in the time delay of HARQ feedback is too long, to affect uplink use Family face time delay.
Therefore, uplink user face time delay how is reduced as technical problem urgently to be resolved.
Summary of the invention
The present invention is based at least one above-mentioned technical problem, a kind of new HARQ feedback scheme is proposed, by matching Special subframe is set to substitute at least one sub-frame of uplink in tdd frame, and based on the downlink resource fractional transmission in special subframe HARQ ACK or the NACK feedback information for upstream data, increase it is more carry out downlink HARQ feedback chances, shorten HARQ feedback time delay, to reduce uplink user face time delay.
In view of this, being suitable for base station the invention proposes a kind of HARQ feedback method, comprising: in tdd frame, configuration Special subframe substitutes at least one sub-frame of uplink in the tdd frame, wherein the special subframe includes downlink resource portion Point；HARQ ACK or NACK by the downlink resource part in the special subframe to terminal transmission for upstream data are fed back Information.
In the technical scheme, at least one sub-frame of uplink in tdd frame is substituted by configuring special subframe, and is passed through Downlink resource part in special subframe is directed to HARQ ACK or the NACK feedback information of upstream data to terminal transmission, especially When in tdd frame including more sub-frame of uplink, increase it is more carry out downlink HARQ feedback chances, it is anti-to shorten HARQ Time delay is presented, to reduce uplink user face time delay.
In the above-mentioned technical solutions, it is preferable that the special subframe further includes ascending resource part and protection interval portion Point.
In the technical scheme, ascending resource part can be used for transmitting uplink data, protection interval part left blank money Source is not used in data transmission.
In any of the above-described technical solution, it is preferable that in the special subframe include M0The case where a OFDM symbol Under, by the preceding M of the special subframe1A OFDM symbol as the ascending resource part, by the intermediate M of the special subframe2It is a OFDM symbol is as the downlink resource part, by the rear M of the special subframe3A OFDM symbol is as the protection interval portion Point；Wherein, M1=M0- M2- M3, M0It is 12 or 14, M1、M2、M3It is positive integer.
In the technical scheme, in general cyclic prefix, special subframe includes 14 OFDM symbols, is followed in extension In the case of ring prefix, special subframe includes 12 OFDM symbols, it is preferable that M2For the positive integer less than or equal to 3, M3For less than Or the positive integer equal to 4.
In any of the above-described technical solution, it is preferable that the OFDM of the protection interval part is set according to radius of society The quantity of symbol, wherein the quantity of the OFDM symbol of the protection interval part and the radius of society are positively correlated.
In the technical scheme, protection interval part is relevant to radius of society, the more big then protection interval of radius of society Part is bigger.
According to the second aspect of the invention, a kind of HARQ feedback method is proposed, is suitable for terminal, comprising: in tdd frame In, special subframe is configured to substitute at least one sub-frame of uplink of the tdd frame, wherein the special subframe includes downlink money Source part；Receive base station by downlink resource fractional transmission in the special subframe for the HARQ ACK of upstream data or NACK feedback information.
In the technical scheme, at least one sub-frame of uplink in tdd frame is substituted by configuring special subframe, and is received HARQ ACK or NACK feedback information for upstream data of the base station by the downlink resource fractional transmission in special subframe, spy When to be not in tdd frame include more sub-frame of uplink, increase it is more carry out downlink HARQ feedback chances, shorten HARQ feedback time delay, to reduce uplink user face time delay.
In the above-mentioned technical solutions, it is preferable that the special subframe further includes ascending resource part and protection interval portion Point.
In the technical scheme, ascending resource part can be used for transmitting uplink data, protection interval part left blank money Source is not used in data transmission.
According to a third aspect of the present invention, a kind of HARQ feedback device is proposed, base station is suitable for, comprising: configuration unit is used In in tdd frame, special subframe is configured to substitute at least one sub-frame of uplink of the tdd frame, wherein the special subframe packet Include downlink resource part；Transmission unit, for being directed to by the downlink resource part in the special subframe to terminal transmission HARQ ACK or the NACK feedback information of row data.
In the technical scheme, at least one sub-frame of uplink in tdd frame is substituted by configuring special subframe, and is passed through Downlink resource part in special subframe is directed to HARQ ACK or the NACK feedback information of upstream data to terminal transmission, especially When in tdd frame including more sub-frame of uplink, increase it is more carry out downlink HARQ feedback chances, it is anti-to shorten HARQ Time delay is presented, to reduce uplink user face time delay.
In the above-mentioned technical solutions, it is preferable that the special subframe further includes ascending resource part and protection interval portion Point.
In the technical scheme, ascending resource part can be used for transmitting uplink data, protection interval part left blank money Source is not used in data transmission.
In any of the above-described technical solution, it is preferable that further include: setting unit, for including in the special subframe There is M0In the case where a OFDM symbol, by the preceding M of the special subframe1A OFDM symbol as the ascending resource part, by institute State the intermediate M of special subframe2A OFDM symbol is as the downlink resource part, by the rear M of the special subframe3A OFDM symbol Number be used as the protection interval part；Wherein, M1=M0- M2- M3, M0It is 12 or 14, M1、M2、M3It is positive integer.
In the technical scheme, in general cyclic prefix, special subframe includes 14 OFDM symbols, is followed in extension In the case of ring prefix, special subframe includes 12 OFDM symbols, it is preferable that M2For the positive integer less than or equal to 3, M3For less than Or the positive integer equal to 4.
In any of the above-described technical solution, it is preferable that the setting unit is also used to: described in being arranged according to radius of society The quantity of the OFDM symbol of protection interval part, wherein the quantity and the cell of the OFDM symbol of the protection interval part Radius is positively correlated.
In the technical scheme, protection interval part is relevant to radius of society, the more big then protection interval of radius of society Part is bigger.
According to the fourth aspect of the invention, a kind of HARQ feedback device is proposed, terminal is suitable for, comprising: configuration unit, At least one sub-frame of uplink of the tdd frame is substituted in tdd frame, configuring special subframe, wherein the special subframe Including downlink resource part；Receiving unit passes through the downlink resource fractional transmission in the special subframe for receiving base station For HARQ ACK or the NACK feedback information of upstream data.
In the technical scheme, at least one sub-frame of uplink in tdd frame is substituted by configuring special subframe, and is received HARQ ACK or NACK feedback information for upstream data of the base station by the downlink resource fractional transmission in special subframe, spy When to be not in tdd frame include more sub-frame of uplink, increase it is more carry out downlink HARQ feedback chances, shorten HARQ feedback time delay, to reduce uplink user face time delay.
In the above-mentioned technical solutions, it is preferable that the special subframe further includes ascending resource part and protection interval portion Point.
In the technical scheme, ascending resource part can be used for transmitting uplink data, protection interval part left blank money Source is not used in data transmission.
According to the fifth aspect of the invention, a kind of base station is proposed, comprising: as described in any one of above-mentioned technical proposal HARQ feedback device.
According to the fifth aspect of the invention, it is also proposed that a kind of terminal, comprising: as described in above-mentioned rapidly any one of scheme HARQ feedback device.
By above technical scheme, at least one downlink subframe in tdd frame, and base are substituted by configuring special subframe HARQ ACK or the NACK feedback information for downlink data of ascending resource fractional transmission in special subframe, increases more More carry out uplink HARQ feedback chances, shortens HARQ feedback time delay, to reduce downlink user face time delay.
Detailed description of the invention
Fig. 1 shows uplink HARQ feedback timing diagram in current standard；
Fig. 2 shows the schematic flow diagrams of HARQ feedback method according to an embodiment of the invention；
Fig. 3 shows the schematic flow diagram of HARQ feedback method in accordance with another embodiment of the present invention；
Fig. 4 shows the schematic block diagram of HARQ feedback device according to an embodiment of the invention；
Fig. 5 shows the schematic block diagram of HARQ feedback device according to another embodiment of the invention；
Fig. 6 shows the schematic block diagram of the base station of embodiment according to the present invention；
Fig. 7 shows the schematic block diagram of the terminal of embodiment according to the present invention；
Fig. 8 shows the structural schematic block diagram of special subframe according to an embodiment of the invention；
Fig. 9 shows the structural schematic block diagram of special subframe according to another embodiment of the invention；
Figure 10 shows the HARQ feedback timing diagram of embodiment according to the present invention.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application Feature in example and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below Specific embodiment limitation.
Fig. 2 shows the schematic flow diagrams of HARQ feedback method according to an embodiment of the invention.
As shown in Fig. 2, HARQ feedback method according to an embodiment of the invention, is suitable for base station, comprising:
Step 202, it in tdd frame, configures special subframe and substitutes at least one sub-frame of uplink in the tdd frame, In, the special subframe includes downlink resource part；
Step 204, the HARQ of upstream data is directed to terminal transmission by the downlink resource part in the special subframe ACK or NACK feedback information.
In the technical scheme, at least one sub-frame of uplink in tdd frame is substituted by configuring special subframe, and is passed through Downlink resource part in special subframe is directed to HARQ ACK or the NACK feedback information of upstream data to terminal transmission, especially When in tdd frame including more sub-frame of uplink, increase it is more carry out downlink HARQ feedback chances, it is anti-to shorten HARQ Time delay is presented, to reduce uplink user face time delay.
In the above-mentioned technical solutions, it is preferable that the special subframe further includes ascending resource part and protection interval portion Point.
In the technical scheme, ascending resource part can be used for transmitting uplink data, protection interval part left blank money Source is not used in data transmission.
Specifically, as shown in figure 8, special subframe duration 1ms (millisecond), including ascending resource part, downlink resource part And protection interval part.
In any of the above-described technical solution, it is preferable that in the special subframe include M0The case where a OFDM symbol Under, by the preceding M of the special subframe1A OFDM symbol as the ascending resource part, by the intermediate M of the special subframe2It is a OFDM symbol is as the downlink resource part, by the rear M of the special subframe3A OFDM symbol is as the protection interval portion Point；Wherein, M1=M0- M2- M3, M0It is 12 or 14, M1、M2、M3It is positive integer.
In the technical scheme, in general cyclic prefix, special subframe includes 14 OFDM symbols, is followed in extension In the case of ring prefix, special subframe includes 12 OFDM symbols, it is preferable that M2For the positive integer less than or equal to 3, M3For less than Or the positive integer equal to 4.
Specifically, as shown in figure 9, preceding 7 (including 0~6) OFDM symbols are as ascending resource part, 3 intermediate (including 7~9) OFDM symbol is as downlink resource part, and rear 4 (including 10~13) OFDM symbols are as protection interval part.
In any of the above-described technical solution, it is preferable that the OFDM of the protection interval part is set according to radius of society The quantity of symbol, wherein the quantity of the OFDM symbol of the protection interval part and the radius of society are positively correlated.
In the technical scheme, protection interval part is relevant to radius of society, the more big then protection interval of radius of society Part is bigger.
In the above-described embodiments, in a tdd frame, at least one sub-frame of uplink is substituted by the special subframe.Such as figure Shown in 10, special subframe is indicated with alphabetical N, and sub-frame of uplink 3 is substituted with sub-frame of uplink 8 by special subframe N, is replaced using special subframe After sub-frame of uplink 3,8, maximum HARQ ACK/NACK feedback interval is that (present frame subframe 3 sends upper line number to 5ms According to 8 feeding back ACKs of this frame subframe/NACK), HARQ feedback time delay shortens, and thus reduces user plane time delay.
Fig. 3 shows the schematic flow diagram of HARQ feedback method in accordance with another embodiment of the present invention.
As shown in figure 3, HARQ feedback method in accordance with another embodiment of the present invention, is suitable for terminal, comprising:
Step 302, in tdd frame, special subframe is configured to substitute at least one sub-frame of uplink of the tdd frame, wherein The special subframe includes downlink resource part；
Step 304, base station is received by the downlink resource fractional transmission in the special subframe for upstream data HARQ ACK or NACK feedback information.
In the technical scheme, at least one sub-frame of uplink in tdd frame is substituted by configuring special subframe, and is received HARQ ACK or NACK feedback information for upstream data of the base station by the downlink resource fractional transmission in special subframe, spy When to be not in tdd frame include more sub-frame of uplink, increase it is more carry out downlink HARQ feedback chances, shorten HARQ feedback time delay, to reduce uplink user face time delay.
In the above-mentioned technical solutions, it is preferable that the special subframe further includes ascending resource part and protection interval portion Point.
In the technical scheme, ascending resource part can be used for transmitting uplink data, protection interval part left blank money Source is not used in data transmission.
Fig. 4 shows the schematic block diagram of HARQ feedback device according to an embodiment of the invention.
As shown in figure 4, HARQ feedback device 400 according to an embodiment of the invention, is suitable for base station, comprising: match Set unit 402 and transmission unit 404.
Wherein, configuration unit 402 is substituted in tdd frame, configuring special subframe at least one of the tdd frame Row subframe, wherein the special subframe includes downlink resource part；Transmission unit 404 is used for by the special subframe Downlink resource part is directed to HARQ ACK or the NACK feedback information of upstream data to terminal transmission.
In the technical scheme, at least one sub-frame of uplink in tdd frame is substituted by configuring special subframe, and is passed through Downlink resource part in special subframe is directed to HARQ ACK or the NACK feedback information of upstream data to terminal transmission, especially When in tdd frame including more sub-frame of uplink, increase it is more carry out downlink HARQ feedback chances, it is anti-to shorten HARQ Time delay is presented, to reduce uplink user face time delay.
In the above-mentioned technical solutions, it is preferable that the special subframe further includes ascending resource part and protection interval portion Point.
In the technical scheme, ascending resource part can be used for transmitting uplink data, protection interval part left blank money Source is not used in data transmission.
In any of the above-described technical solution, it is preferable that further include: setting unit 406, in the special subframe packet Contain M0In the case where a OFDM symbol, by the preceding M of the special subframe1A OFDM symbol is as the ascending resource part, general The intermediate M of the special subframe2A OFDM symbol is as the downlink resource part, by the rear M of the special subframe3A OFDM Symbol is as the protection interval part；Wherein, M1=M0- M2- M3, M0It is 12 or 14, M1、M2、M3It is positive integer.
In the technical scheme, in general cyclic prefix, special subframe includes 14 OFDM symbols, is followed in extension In the case of ring prefix, special subframe includes 12 OFDM symbols, it is preferable that M2For the positive integer less than or equal to 3, M3For less than Or the positive integer equal to 4.
In any of the above-described technical solution, it is preferable that the setting unit 406 is also used to: being arranged according to radius of society The quantity of the OFDM symbol of the protection interval part, wherein the quantity of the OFDM symbol of the protection interval part with it is described Radius of society is positively correlated.
In the technical scheme, protection interval part is relevant to radius of society, the more big then protection interval of radius of society Part is bigger.
Fig. 5 shows the schematic block diagram of HARQ feedback device according to another embodiment of the invention.
As shown in figure 5, HARQ feedback device 500 according to another embodiment of the invention, is suitable for terminal, comprising: Configuration unit 502 and receiving unit 504.
Wherein, configuration unit 502 is substituted in tdd frame, configuring special subframe at least one of the tdd frame Row subframe, wherein the special subframe includes downlink resource part；Receiving unit 504 is for receiving base station by described special HARQ ACK or the NACK feedback information for upstream data of downlink resource fractional transmission in subframe.
In the technical scheme, at least one sub-frame of uplink in tdd frame is substituted by configuring special subframe, and is received HARQ ACK or NACK feedback information for upstream data of the base station by the downlink resource fractional transmission in special subframe, spy When to be not in tdd frame include more sub-frame of uplink, increase it is more carry out downlink HARQ feedback chances, shorten HARQ feedback time delay, to reduce uplink user face time delay.
In the above-mentioned technical solutions, it is preferable that the special subframe further includes ascending resource part and protection interval portion Point.
In the technical scheme, ascending resource part can be used for transmitting uplink data, protection interval part left blank money Source is not used in data transmission.
Fig. 6 shows the schematic block diagram of the base station of embodiment according to the present invention.
As shown in fig. 6, the base station 600 of embodiment according to the present invention, comprising: HARQ feedback device as shown in Figure 4 400。
Fig. 7 shows the schematic block diagram of the terminal of embodiment according to the present invention.
As shown in fig. 7, the terminal 700 of embodiment according to the present invention, comprising: HARQ feedback device as shown in Figure 5 500。
The technical scheme of the present invention has been explained in detail above with reference to the attached drawings, and the invention proposes a kind of new new HARQ is anti- Feedback scheme substitutes at least one sub-frame of uplink in tdd frame by configuring special subframe, and based on the downlink in special subframe It is anti-to increase more progress downlink HARQ for HARQ ACK or the NACK feedback information for upstream data of resource part transmission Chance is presented, HARQ feedback time delay is shortened, to reduce uplink user face time delay.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims (10)

1. a kind of HARQ feedback method is suitable for base station characterized by comprising
In tdd frame, special subframe is configured to substitute at least one sub-frame of uplink of the tdd frame, wherein the special subframe Including downlink resource part；
It is anti-for the HARQ ACK or NACK of upstream data to terminal transmission by the downlink resource part in the special subframe Feedforward information；
The special subframe further includes ascending resource part and protection interval part.
2. HARQ feedback method according to claim 1, which is characterized in that in the special subframe include M0A OFDM In the case where symbol, by the preceding M of the special subframe1A OFDM symbol as the ascending resource part, by the special son The intermediate M of frame2A OFDM symbol is as the downlink resource part, by the rear M of the special subframe3A OFDM symbol is as institute State protection interval part；
Wherein, M1=M0- M2- M3, M0It is 12 or 14, M1、M2、M3It is positive integer.
3. HARQ feedback method according to claim 2, which is characterized in that the protection interval is arranged according to radius of society The quantity of partial OFDM symbol, wherein the quantity of the OFDM symbol of the protection interval part and the radius of society positive It closes.
4. a kind of HARQ feedback method is suitable for terminal characterized by comprising
In tdd frame, special subframe is configured to substitute at least one sub-frame of uplink of the tdd frame, wherein the special subframe Including downlink resource part；
Receive base station by downlink resource fractional transmission in the special subframe for the HARQ ACK of upstream data or NACK feedback information；
The special subframe further includes ascending resource part and protection interval part.
5. a kind of HARQ feedback device is suitable for base station characterized by comprising
Configuration unit substitutes at least one sub-frame of uplink of the tdd frame in tdd frame, configuring special subframe, In, the special subframe includes downlink resource part；
Transmission unit, for being directed to the HARQ of upstream data to terminal transmission by the downlink resource part in the special subframe ACK or NACK feedback information；
The special subframe further includes ascending resource part and protection interval part.
6. HARQ feedback device according to claim 5, which is characterized in that further include:
Setting unit, for including M in the special subframe0In the case where a OFDM symbol, by the preceding M of the special subframe1 A OFDM symbol as the ascending resource part, by the intermediate M of the special subframe2A OFDM symbol is provided as the downlink Source part, by the rear M of the special subframe3A OFDM symbol is as the protection interval part；
Wherein, M1=M0- M2- M3, M0It is 12 or 14, M1、M2、M3It is positive integer.
7. HARQ feedback device according to claim 6, which is characterized in that the setting unit is also used to:
The quantity of the OFDM symbol of the protection interval part is set according to radius of society, wherein the protection interval part The quantity of OFDM symbol and the radius of society are positively correlated.
8. a kind of HARQ feedback device is suitable for terminal characterized by comprising
Configuration unit substitutes at least one sub-frame of uplink of the tdd frame in tdd frame, configuring special subframe, In, the special subframe includes downlink resource part；
Receiving unit, for receiving base station by downlink resource fractional transmission in the special subframe for upstream data HARQ ACK or NACK feedback information；
The special subframe further includes ascending resource part and protection interval part.
9. a kind of base station characterized by comprising the HARQ feedback device as described in any one of claim 5 to 7.
10. a kind of terminal characterized by comprising HARQ feedback device as claimed in claim 8.
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