WO2018103289A1 - Method and device for feeding back downlink harq of tdd system - Google Patents

Abstract

Provided are a method for feeding back a downlink HARQ of a TDD system and a device for feeding back a downlink HARQ of a TDD system. The method for feeding back a downlink HARQ of a TDD system comprises: receiving downlink data transmitted over the sub-frame n of the current frame; feeding back, over a target uplink sub-frame, HARQ ACK or NACK feedback information for the downlink data, the target uplink sub-frame being the uplink sub-frame n+k of the current frame or being the uplink sub-frame (n+k)%10 of the next frame adjacent to the current frame, % being a modulus operator, n being an integer of 0~9, k being a preset value greater than 0. The technical solution of the present invention allows the downlink HARQ feedback time sequence to satisfy the lowest latency requirement of the TDD system, and meanwhile can effectively balance control information overheads over respective uplink sub-frames.

Description

Downlink HARQ feedback method and device for TDD system

The present application claims priority to Chinese Patent Application No. 201611139056.0, entitled "Down HARQ Feedback Method and Apparatus for TDD System" on December 8, 2016, the entire contents of which are incorporated herein by reference. In the application.

Technical field

The present invention relates to the field of communications technologies, and in particular, to a downlink HARQ feedback method for a TDD system and a downlink HARQ feedback device for a TDD system.

Background technique

With the development of the mobile Internet, a large number of application services have emerged to meet various specific functions. Some of these services have lower requirements on data delay, such as sending and receiving emails, downloading movies, etc.; however, some businesses have strict requirements on data delays, such as online online games, snapping up, grabbing red packets, etc. The latency of the user data is required to be as short as possible. There are two main ideas for the current LTE (Long Term Evolution) standard discussion: how to use a shorter TTI (Transmission Time Interval). That is, the data transmission and reception interval uses a shorter TTI than the current 1 ms to reduce the data processing delay; another idea is to use better performance calculation, storage, and calculation algorithms in the higher version of the terminal, so that the data processing delay is reduced. For example, a higher version of the terminal supports a shorter data processing delay in the case of 1 ms TTI to reduce the uplink scheduling delay (the delay from receiving the UL-grant (uplink scheduling grant) to the terminal transmitting the uplink data from the terminal), HARQ (Hybrid) Automatic Repeat Request, hybrid automatic repeat request) feedback delay (from the terminal receiving downlink data to the terminal sending ACK (Acknowledgement)/NACK (Negative Acknowledgement) for this downlink data).

In the downlink HARQ feedback process, after receiving the downlink data sent by the base station, the terminal receives the downlink data. It takes a while to process the data and then prepare ACK/NACK feedback. For the current version of the terminal, the time required is usually less than 4ms, so the current HARQ feedback delay in the LTE FDD (Frequency Division Duplexing) system is set to 4ms; however, in LTE TDD (Time Division Duplexing, time division) In the duplex mode, the design of the HARQ feedback timing needs to meet the minimum 4 ms delay requirement, and the overhead of balancing the downlink HARQ ACK/NACK feedback in each uplink subframe needs to be considered. To balance the control message load of each uplink subframe, try to avoid that some uplink subframes need to feed back more ACK/NACK of the HARQ process, while some uplink subframes do not need to feed back any ACK/NACK of the HARQ process. The design criteria for downlink HARQ feedback timing in current LTE TDD systems are described in 3GPP TS 36.213.

However, the high version of the terminal will most likely satisfy the processing delay of less than 3 ms, that is, the downlink data sent by the base station in the downlink subframe n, and the higher version terminal can prepare the corresponding downlink when the uplink subframe is n+3. ACK/NACK feedback of the data. In this case, if the system is an FDD system, the design of the downlink HARQ feedback timing is very simple. That is, the higher version terminal responds to the downlink data received in any downlink subframe n correspondingly in the uplink subframe n+3. ACK/NACK. For the TDD system, in addition to satisfying the minimum 3 ms delay, it is also necessary to consider the problem of balance of control information overhead in each uplink subframe. If only the HARQ feedback delay is reduced (in the case of satisfying the 3 ms delay), the HARQ timing corresponding to a frame configuration module can be designed as shown in FIG. 1 , and the uplink subframe 2 needs to feed back two downlink HARQ processes. ACK/NACK, and the uplink subframe 7 does not need to feed back the HARQ process ACK/NACK of any process, thus causing the control signaling overhead imbalance required for the uplink subframe.

Therefore, there is no specific HARQ timing design scheme for the 3ms delay mode of the LTE TDD system.

Summary of the invention

The present invention is based on the above problems, and proposes a new technical solution. For different uplink and downlink subframe configurations of the TDD system, the downlink HARQ feedback timing can meet the minimum delay requirement of the system, and can be effectively balanced at the same time. Control information overhead on each uplink subframe.

In view of this, in the first aspect of the present invention, a downlink HARQ inverse of a TDD system is proposed. The method includes: receiving downlink data sent on the subframe n in the current frame; and feeding back, by using the HARQ ACK or the NACK feedback information for the downlink data, on the target uplink subframe, where the target uplink subframe is The uplink subframe n+k in the current frame or the uplink subframe (n+k)%10 in the next frame adjacent to the current frame, where % is a remainder operator, and n is 0-9 The integer, k is a preset value greater than zero.

In the technical solution, when the terminal receives the downlink data sent by the base station in the subframe n of the current frame, the ACK or NACK feedback information of the downlink HARQ process of the terminal for the terminal meets the minimum delay requirement of the TDD system. And effectively balancing the control information overhead on each uplink subframe, the uplink subframe n+k of the current frame or the uplink subframe (n+k)%10 of the next frame adjacent to the current frame may be performed. The ACK or the NACK feedback information is transmitted. In this manner, for the uplink and downlink subframe configuration of the TDD system, the target uplink subframe for performing HARQ feedback is determined according to the sequence number of the subframe n receiving the downlink data and the k value corresponding thereto. To implement the downlink HARQ feedback timing design of the TDD system.

Where % represents the remainder operator, and n is an integer from 0 to 9, and k is a preset value greater than 0 corresponding to n.

In the above technical solution, preferably, after receiving the downlink data sent on the subframe n in the current frame, the HARQ ACK or NACK feedback information for the downlink data is fed back on the target uplink subframe. The method further includes: determining a frame configuration mode of the current frame; and acquiring the value of the k according to the value of n and the frame configuration mode.

In this technical solution, in order to determine a target uplink subframe for transmitting ACK or NACK feedback information for downlink data received on subframe n more accurately and quickly, it may first determine the current location of the subframe n in which the downlink data is received. The frame configuration mode of the frame is then combined with the frame configuration mode to determine the value of k corresponding to n, thereby locating the target subframe for HARQ feedback.

In any of the above technical solutions, preferably, the value of k is an integer greater than or equal to 3, and the HARQ delay of the TDD system is at least 3 ms.

In this technical solution, for the different uplink and downlink subframe configuration of the TDD system, the value of k may further be greater than or equal to 3 integers to ensure that the delay requirement of the downlink HARQ feedback of the 3 ms TDD system can be satisfied.

In any one of the above technical solutions, preferably, the value according to n and the frame configuration mode The step of obtaining the value of the k includes: when the current frame is in the first frame configuration mode, if the values of n are 0, 1, 5, and 6, respectively, the corresponding value of the k is If the current frame is in the second frame configuration mode, if the values of n are 0, 1, 4, 5, 6, and 9, respectively, the corresponding values of k are 3, 6, respectively. 3, 3, 6, and 3; when the current frame is in the third frame configuration mode, if the values of n are 0, 1, 3, 4, 5, 6, 8, and 9, respectively, the corresponding The values of k are 7, 6, 4, 3, 7, 6, 4, and 3, respectively. When the current frame is in the fourth frame configuration mode, the values of n are 0, 1, 5, and 6, respectively. 7, 8, and 9, the corresponding values of k are 4, 3, 7, 6, 5, 5, and 4; when the current frame is in the fifth frame configuration mode, if the values of n are respectively 0, 1, 4, 5, 6, 7, 8, and 9, the corresponding values of k are 3, 11, 8, 7, 6, 6, 5, and 4, respectively; when the current frame is In the sixth frame configuration mode, if the values of n are 0, 1, 3, 4, 5, 6, 7, 8, and 9, respectively, the corresponding values of k are 12, 11, 9, and 8, respectively. 7,6 5, 4, and 3; when the current frame is in the seventh frame configuration mode, if the values of n are 0, 1, 5, 6, and 9, respectively, the corresponding values of k are 4, respectively. 6, 3, 6 and 4.

In this technical solution, for the different uplink and downlink subframe configuration of the TDD system, the value of n of the subframe n according to the received downlink data of the current frame is different, and the corresponding value of k corresponding to or greater than 3 has a corresponding value. To ensure that the characteristics of different TDD uplink and downlink subframes are configured, the downlink HARQ feedback timing can meet the minimum delay requirement of the TDD system, and at the same time, the control information overhead on each uplink subframe can be effectively balanced.

In any of the above technical solutions, preferably, the subframe n is a downlink subframe or a special subframe.

In this technical solution, the terminal can receive the downlink data sent by the base station in the downlink subframe n of the current frame or the special subframe n of the current frame.

A second aspect of the present invention provides a downlink HARQ feedback apparatus for a TDD system, including: a receiving module, configured to receive downlink data sent on a subframe n in a current frame; and a feedback module, configured to The HARQ ACK or NACK feedback information of the downlink data received by the receiving module is fed back in a target uplink subframe, where the target uplink subframe is an uplink subframe n+k or the current frame in the current frame. The uplink subframe (n+k)%10 in the next adjacent frame, where % is the remainder operator, n is an integer from 0 to 9, and k is a preset value greater than 0.

In this technical solution, the terminal receives the downlink data sent by the base station on the subframe n of the current frame. In order to ensure that the ACK or NACK feedback information of the downlink HARQ process of the downlink data meets the minimum delay requirement of the TDD system and effectively balance the control information overhead on each uplink subframe, the current frame may be uplinked. The ACK or NACK feedback information is sent on the subframe n+k or the uplink subframe (n+k)%10 of the next frame adjacent to the current frame. Thus, for different uplink and downlink subframe configurations of the TDD system, Determining a target uplink subframe for performing HARQ feedback according to a sequence number of the subframe n receiving the downlink data and a k value corresponding thereto to implement a downlink HARQ feedback timing design of the TDD system.

Where % represents the remainder operator, and n is an integer from 0 to 9, and k is a preset value greater than 0 corresponding to n.

In the above technical solution, the method further includes: a determining module, after the receiving module receives the downlink data sent on the subframe n in the current frame, the feedback module is to be used for the downlink data. And determining, by the HARQ ACK or the NACK feedback information, the frame configuration mode of the current frame before the feedback is performed on the target uplink subframe, where the acquiring module is configured to acquire, according to the value of n and the frame configuration mode determined by the determining module The value of k is described.

In this technical solution, in order to determine a target uplink subframe for transmitting ACK or NACK feedback information for downlink data received on subframe n more accurately and quickly, it may first determine the current location of the subframe n in which the downlink data is received. The frame configuration mode of the frame is then combined with the frame configuration mode to determine the value of k corresponding to n, thereby locating the target subframe for HARQ feedback.

In any of the above technical solutions, preferably, the value of k is an integer greater than or equal to 3, and the HARQ delay of the TDD system is at least 3 ms.

In this technical solution, for the different uplink and downlink subframe configuration of the TDD system, the value of k may further be greater than or equal to 3 integers to ensure that the delay requirement of the downlink HARQ feedback of the 3 ms TDD system can be satisfied.

In any one of the foregoing technical solutions, the acquiring module is specifically configured to: when the current frame is in the first frame configuration mode, if the values of n are 0, 1, 5, and 6, respectively, The value of k is 3; when the current frame is in the second frame configuration mode, if the values of n are 0, 1, 4, 5, 6, and 9, respectively, the corresponding k is taken. The values are 3, 6, 3, 3, 6, and 3 respectively; when the current frame is in the third frame configuration mode, if n is 0, 1, 3, 4, 5, 6, 8, and 9, respectively , the corresponding values of k are 7, 6, 4, 3, 7, 6, 4, and 3, respectively; when the current frame When the mode is configured for the fourth frame, if the values of n are 0, 1, 5, 6, 7, 8, and 9, respectively, the corresponding values of k are 4, 3, 7, 6, and 5, respectively. 5 and 4; when the current frame is in the fifth frame configuration mode, if the values of n are 0, 1, 4, 5, 6, 7, 8, and 9, respectively, the corresponding values of k are respectively 3, 11, 8, 7, 6, 6, 5, and 4; when the current frame is in the sixth frame configuration mode, if the values of n are 0, 1, 3, 4, 5, 6, and 7, respectively , 8 and 9, the corresponding values of k are 12, 11, 9, 8, 7, 6, 5, 4, and 3; when the current frame is in the seventh frame configuration mode, if n The values are 0, 1, 5, 6, and 9, respectively, and the corresponding values of k are 4, 6, 3, 6, and 4, respectively.

In this technical solution, for the different uplink and downlink subframe configuration of the TDD system, the value of n of the subframe n according to the received downlink data of the current frame is different, and the corresponding value of k corresponding to or greater than 3 has a corresponding value. To ensure that the characteristics of different TDD uplink and downlink subframes are configured, the downlink HARQ feedback timing can meet the minimum delay requirement of the TDD system, and at the same time, the control information overhead on each uplink subframe can be effectively balanced.

In any of the above technical solutions, preferably, the subframe n is a downlink subframe or a special subframe.

In this technical solution, the terminal can receive the downlink data sent by the base station in the downlink subframe n of the current frame or the special subframe n of the current frame.

A third aspect of the present invention provides a terminal, comprising: a downlink HARQ feedback device of the TDD system according to any one of the preceding claims, wherein the terminal has any one of the above technical solutions. All the beneficial effects of the downlink HARQ feedback device of the TDD system are not described herein.

According to a fourth aspect of the present invention, there is also provided a computer device comprising a processor, the processor for implementing the TDD described in the technical solution of the first aspect as described above for executing a computer program stored in the memory The steps of the system's downstream HARQ feedback method.

According to a fifth aspect of the present invention, there is also provided a computer storage medium having stored thereon computer instructions, wherein the computer instructions are executed by a processor to implement the TDD system according to any one of the first aspects of the first aspect The steps of the downlink HARQ feedback method.

With the technical solution of the present invention, the downlink HARQ feedback timing can meet the minimum delay requirement of the system for the uplink and downlink subframe configuration of the TDD system, and the control information overhead on each uplink subframe can be effectively balanced.

DRAWINGS

FIG. 1 is a schematic diagram showing timing of HARQ feedback in the related art;

2 is a schematic flowchart diagram of a downlink HARQ feedback method of a TDD system according to an embodiment of the present invention;

FIG. 3 is a schematic flowchart diagram of a method for determining a value of k according to an embodiment of the present invention; FIG.

FIG. 4 is a schematic diagram of a HARQ feedback timing sequence corresponding to a first frame configuration mode according to an embodiment of the present invention; FIG.

FIG. 5 is a schematic diagram of a HARQ feedback timing sequence corresponding to a second frame configuration mode according to an embodiment of the present invention; FIG.

FIG. 6 is a schematic diagram showing a HARQ feedback timing sequence corresponding to a third frame configuration mode according to an embodiment of the present invention; FIG.

FIG. 7 is a schematic diagram showing a HARQ feedback timing sequence corresponding to a fourth frame configuration mode according to an embodiment of the present invention; FIG.

FIG. 8 is a schematic diagram showing a HARQ feedback timing sequence corresponding to a fifth frame configuration mode according to an embodiment of the present invention; FIG.

FIG. 9 is a schematic diagram showing a timing of HARQ feedback corresponding to a sixth frame configuration mode according to an embodiment of the present invention; FIG.

FIG. 10 is a schematic diagram showing a timing of HARQ feedback corresponding to a seventh frame configuration mode according to an embodiment of the present invention; FIG.

11 is a schematic block diagram of a downlink HARQ feedback apparatus of a TDD system of an embodiment of the present invention;

Figure 12 shows a schematic block diagram of a computer device of an embodiment of the present invention.

detailed description

The above described objects, features and advantages of the present invention will become more apparent from the detailed description of the appended claims. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the invention, but the invention may be practiced in other embodiments other than those described herein. The scope of protection is not limited by the specific embodiments disclosed below.

2 is a flow chart showing a downlink HARQ feedback method of a TDD system according to an embodiment of the present invention.

As shown in FIG. 2, the downlink HARQ feedback method of the TDD system according to the embodiment of the present invention specifically includes the following process steps:

Step 202: Receive downlink data sent on subframe n in the current frame.

The terminal can receive the downlink data sent by the base station in the downlink subframe n of the current frame or the special subframe n of the current frame, that is, the subframe n can be either a downlink subframe or a special subframe.

Step 204: The HARQ ACK or the NACK feedback information for the downlink data is fed back on the target uplink subframe, where the target uplink subframe is the uplink subframe n+k or the current frame in the current frame. The uplink subframe (n+k)%10 in the next adjacent frame, where % is the remainder operator, n is an integer from 0 to 9, and k is a preset value greater than 0.

In this embodiment, when the terminal receives the downlink data sent by the base station in the subframe n of the current frame, the ACK or NACK feedback information of the downlink HARQ process of the terminal for the terminal meets the minimum delay requirement of the TDD system. And effectively balancing the control information overhead on each uplink subframe, the uplink subframe n+k of the current frame or the uplink subframe (n+k)%10 of the next frame adjacent to the current frame may be performed. The ACK or the NACK feedback information is transmitted. In this manner, for the uplink and downlink subframe configuration of the TDD system, the target uplink subframe for performing HARQ feedback is determined according to the sequence number of the subframe n receiving the downlink data and the k value corresponding thereto. To implement the downlink HARQ feedback timing design of the TDD system.

Where % represents the remainder operator, and n is an integer from 0 to 9, and k is a preset value greater than 0 corresponding to n.

Further, in the above embodiment, after the step 102 and before the step 104, the process step of determining the value of k as shown in FIG. 3 is further included, which specifically includes:

Step S30, determining a frame configuration mode of the current frame.

Step S32: Acquire the value of the k according to the value of n and the frame configuration mode.

In this embodiment, in order to more accurately and quickly determine a target uplink subframe for transmitting ACK or NACK feedback information for downlink data received on subframe n, it may be first determined. The frame configuration mode of the current frame in which the subframe n of the downlink data is received is determined, and then the value of k corresponding to n is determined in combination with the frame configuration mode, thereby positioning the target subframe for HARQ feedback.

Further, in any of the above embodiments, the value of k is an integer greater than or equal to 3, and the HARQ delay of the TDD system is at least 3 ms, that is, different uplink and downlink subframe configurations for the TDD system. The value of k may further be greater than or equal to 3 integers to ensure that the delay requirement of downlink HARQ feedback of 3 ms of the TDD system can be met.

Further, in any of the foregoing embodiments, the value of k is obtained according to the value of n and the frame configuration mode, that is, the mapping relationship between n and k for different uplink and downlink subframe configurations, as shown in Table 1 below. Downlink HARQ ACK/NACK feedback timing in 3ms delay mode:

Table 1

As shown in Table 1, when the current frame is in the first frame configuration mode (ie, configuration 0), if the value of the subframe number n is 0, 1, 5, and 6, respectively, the corresponding value of the k is All are 3, the specific HARQ feedback timing is shown in FIG. 4; when the current frame is the second frame configuration mode (ie, configuration 1), if the subframe number n is 0, 1, 4, 5, 6 and 9, the corresponding k values are 3, 6, 3, 3, 6, and 3, respectively, the specific HARQ feedback timing is shown in Figure 5; when the current frame is the third frame configuration mode (ie, configuration 2) If the values of the subframe number n are 0, 1, 3, 4, 5, 6, 8, and 9, respectively, the corresponding values of k are 7, 6, 4, 3, 7, and 6, respectively. 4 and 3, the specific HARQ feedback timing is shown in FIG. 6; when the current frame is the fourth frame configuration mode (ie, configuration 3), if the subframe number n is 0, 1, 5, 6, 7, respectively. 8 and 9, the corresponding values of k are 4, 3, 7, 6, 5, 5, and 4, respectively, and the specific HARQ feedback timing is shown in FIG. 7; when the current frame is the fifth frame configuration mode ( That is, when 4) is configured, if the value of the subframe number n is 0, 1, 4, 5, 6, 7, 8, and 9, respectively, the corresponding The values of k are 3, 11, 8, 7, 6, 6, 5, and 4, respectively, and the specific HARQ feedback timing is shown in FIG. 8; when the current frame is the sixth frame. When the mode is set (ie, configuration 5), if the values of the subframe number n are 0, 1, 3, 4, 5, 6, 7, 8, and 9, respectively, the corresponding values of k are 12 and 11, respectively. 9, 8, 8, 6, 6, 5, 4, and 3, the specific HARQ feedback timing is shown in FIG. 9; when the current frame is the seventh frame configuration mode (ie, configuration 6), if the value of the subframe number n is respectively The values of the corresponding k are 0, 1, 5, 6, and 9, respectively, and the values of the corresponding k are 4, 6, 3, 6, and 4. The specific HARQ feedback timing is shown in FIG. 10, that is, the HARQ process in the downlink subframe 0. In the uplink subframe 4 of the current frame (ie, the current frame), the HARQ process of the downlink subframe 6 is fed back on the uplink subframe 2 of the next frame, and the timing design of the scheme is to satisfy the 3 ms delay, in each case. Each uplink subframe has one HARQ process that needs feedback, taking into account the requirements of both delay and control signaling balance.

In this embodiment, for the different uplink and downlink subframe configuration of the TDD system, the value of n of the subframe n according to the received downlink data of the current frame is different, and the corresponding value of k greater than or equal to 3 has a corresponding value. To ensure that the characteristics of different TDD uplink and downlink subframes are configured, the downlink HARQ feedback timing can meet the minimum delay of 3 ms of the TDD system, and at the same time, the control information overhead on each uplink subframe can be effectively balanced.

11 is a schematic block diagram of a downlink HARQ feedback apparatus of a TDD system of an embodiment of the present invention.

As shown in FIG. 11, a downlink HARQ feedback apparatus 1100 of a TDD system according to an embodiment of the present invention includes a receiving module 1102 and a feedback module 1104.

The receiving module 1102 is configured to receive downlink data sent on a subframe n in a current frame, and the feedback module 1104 is configured to: use a HARQ ACK or a NACK of the downlink data received by the receiving module 1102. The feedback information is fed back on the target uplink subframe, where the target uplink subframe is an uplink subframe n+k in the current frame or an uplink subframe in a next frame adjacent to the current frame (n+ k)%10, where % is the remainder operator, n is an integer from 0 to 9, and k is a preset value greater than zero.

In this embodiment, when the terminal receives the downlink data sent by the base station in the subframe n of the current frame, the ACK or NACK feedback information of the downlink HARQ process of the terminal for the terminal meets the minimum delay requirement of the TDD system. And effectively balancing the control information overhead on each uplink subframe, the uplink subframe n+k of the current frame or the uplink subframe (n+k)%10 of the next frame adjacent to the current frame may be performed. ACK or NACK feedback information is sent, thus, for TDD In the case of different uplink and downlink subframe configurations of the system, the target uplink subframe for performing HARQ feedback is determined according to the sequence number of the subframe n receiving the downlink data and the corresponding k value to implement the downlink HARQ feedback timing design of the TDD system.

Where % represents the remainder operator, and n is an integer from 0 to 9, and k is a preset value greater than 0 corresponding to n.

Further, in the foregoing embodiment, the subframe n is a downlink subframe or a special subframe, that is, the terminal may receive the base station sent in the downlink subframe n of the current frame or the special subframe n of the current frame. Downstream data.

Further, in any of the foregoing embodiments, as shown in FIG. 11, the downlink HARQ feedback device 1100 of the TDD system further includes: a determining module 1106 and an obtaining module 1108.

The determining module 1106 is configured to: after the receiving module 1102 receives the downlink data sent on the subframe n in the current frame, the feedback module 1104 may feed back HARQ ACK or NACK information for the downlink data. Determining a frame configuration mode of the current frame before performing feedback on the target uplink subframe; the obtaining module 1108 is configured to acquire the k according to the value of n and the frame configuration mode determined by the determining module 1106 Value.

In this embodiment, in order to more accurately and quickly determine a target uplink subframe for transmitting ACK or NACK feedback information for downlink data received on subframe n, it may first determine the current location of subframe n in which downlink data is received. The frame configuration mode of the frame is then combined with the frame configuration mode to determine the value of k corresponding to n, thereby locating the target subframe for HARQ feedback.

Further, in any of the foregoing embodiments, the value of k is an integer greater than or equal to 3, and the HARQ delay of the TDD system is at least 3 ms.

In this embodiment, that is, for different uplink and downlink subframe configuration situations of the TDD system, the value of k may further be greater than or equal to 3 integers to ensure that the delay requirement of downlink HARQ feedback of 3 ms of the TDD system can be met.

Further, in any of the foregoing embodiments, the acquiring module 1108 is specifically configured to: when the current frame is in the first frame configuration mode, if the values of n are 0, 1, 5, and 6, respectively, The value of k is 3; when the current frame is in the second frame configuration mode, if the values of n are 0, 1, 4, 5, 6, and 9, respectively, the corresponding k The values are 3, 6, 3, 3, 6, and 3; when the current frame is in the third frame configuration mode, if the values of n are 0, 1, 3, 4, 5, 6, and 8, respectively. And 9, the corresponding values of k are 7, 6, 4, 3, 7, 6, 4, and 3; when the current frame is in the fourth frame configuration mode, if the values of n are respectively 0, 1, 5, 6, 7, 8, and 9, the corresponding k values are 4, 3, 7, 6, 5, 5, and 4, respectively; when the current frame is the fifth frame configuration mode If the values of n are 0, 1, 4, 5, 6, 7, 8, and 9, respectively, the corresponding values of k are 3, 11, 8, 7, 6, 6, and 5, respectively. 4; when the current frame is in the sixth frame configuration mode, if the values of n are 0, 1, 3, 4, 5, 6, 7, 8, and 9, respectively, the corresponding values of the k are respectively 12, 11, 9, 8, 7, 6, 6, 4, and 3; when the current frame is in the seventh frame configuration mode, if the values of n are 0, 1, 5, 6, and 9, respectively, Corresponding values of k are 4, 6, 3, 6, and 4, respectively.

In this embodiment, for the different uplink and downlink subframe configuration of the TDD system, the value of n of the subframe n according to the received downlink data of the current frame is different, and the corresponding value of k greater than or equal to 3 has a corresponding value. To ensure that the characteristics of different TDD uplink and downlink subframes are configured, the downlink HARQ feedback timing can meet the minimum delay requirement of the TDD system, and at the same time, the control information overhead on each uplink subframe can be effectively balanced.

In any of the above embodiments, the feedback module 1104, the determining module 1106, and the obtaining module 1108 may be a central processing unit (CPU), a microprocessor, or a digital signal processor (DSP), and a receiving module. 1102 can be an antenna.

As an embodiment of the present invention, the downlink HARQ feedback apparatus 1100 of the TDD system described in any of the foregoing embodiments may be applied to the terminal, and therefore, the terminal has the TDD system according to any one of the foregoing technical solutions. All the beneficial effects of the downlink HARQ feedback device 1100 will not be described herein.

Figure 12 shows a schematic block diagram of a computer device of an embodiment of the present invention.

As shown in FIG. 12, a computer device 1200 in accordance with an embodiment of the present invention includes a processor 1202 and a memory 1204, wherein the processor 1202 is configured to perform the following operations when executing a computer program stored in the memory 1204:

Receiving downlink data sent on subframe n in the current frame;

And transmitting the HARQ ACK or NACK feedback information for the downlink data on the target uplink subframe, where the target uplink subframe is an uplink subframe n+k in the current frame or adjacent to the current frame. Upstream subframe (n+k)%10 in the next frame, where % is the remainder operator, n It is an integer from 0 to 9, and k is a preset value greater than zero.

As an optional implementation, when the processor 1202 is configured to execute the computer program stored in the memory 1204, specifically, after performing downlink data sent on the subframe n in the current frame, the Performing the following operations on the HARQ ACK or NACK feedback information of the downlink data before performing feedback on the target uplink subframe:

Determining a frame configuration mode of the current frame;

Obtaining the value of the k according to the value of n and the frame configuration mode.

The steps in the method of the embodiment of the present invention may be sequentially adjusted, merged, and deleted according to actual needs. The downlink HARQ feedback device, the terminal, and the unit in the computer equipment of the TDD system of the embodiment of the present invention may be combined, divided, and deleted according to actual needs.

One of ordinary skill in the art can understand that all or part of the various methods of the above embodiments can be completed by a program to instruct related hardware, the program can be stored in a computer readable storage medium, and the storage medium includes read only Read-Only Memory (ROM), Random Access Memory (RAM), Programmable Read-Only Memory (PROM), Erasable Programmable Read Only Memory (Erasable Programmable Read Only Memory) EPROM), One-Time Programmable Read-Only Memory (OTPROM), Electronically-Erasable Programmable Read-Only Memory (EEPROM), Read-Only Disc (Compact Disc) Read-Only Memory (CD-ROM) or other optical disc storage, disk storage, magnetic tape storage, or any other medium readable by a computer that can be used to carry or store data.

The technical solution of the present invention is described in detail with reference to the accompanying drawings. With the technical solution of the present invention, the downlink HARQ feedback timing can meet the minimum delay requirement of the system for different uplink and downlink subframe configurations of the TDD system, and at the same time, Effectively balance the control information overhead on each uplink subframe.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims (12)

A downlink HARQ feedback method for a TDD system, comprising: Receiving downlink data sent on subframe n in the current frame; And transmitting the HARQ ACK or NACK feedback information for the downlink data on the target uplink subframe, where the target uplink subframe is an uplink subframe n+k in the current frame or adjacent to the current frame. The uplink subframe (n+k)%10 in the next frame, where % is the remainder operator, n is an integer from 0 to 9, and k is a preset value greater than zero. The downlink HARQ feedback method according to claim 1, wherein after receiving the downlink data sent on the subframe n in the current frame, the HARQ ACK or NACK feedback information for the downlink data is Before the feedback is performed on the target uplink subframe, it also includes: Determining a frame configuration mode of the current frame; Obtaining the value of the k according to the value of n and the frame configuration mode. The downlink HARQ feedback method according to claim 1 or 2, wherein the value of k is an integer greater than or equal to 3, and the HARQ delay of the TDD system is at least 3 ms. The downlink HARQ feedback method according to claim 3, wherein the step of acquiring the value of the k according to the value of n and the frame configuration mode comprises: When the current frame is in the first frame configuration mode, if the values of n are 0, 1, 5, and 6, respectively, the corresponding values of k are all 3; When the current frame is in the second frame configuration mode, if the values of n are 0, 1, 4, 5, 6, and 9, respectively, the corresponding values of k are 3, 6, 3, and 3, respectively. , 6 and 3; When the current frame is in the third frame configuration mode, if the values of n are 0, 1, 3, 4, 5, 6, 8, and 9, respectively, the corresponding values of k are 7, 6 respectively. , 4, 3, 7, 6, 4 and 3; When the current frame is in the fourth frame configuration mode, if the values of n are 0, 1, 5, 6, 7, 8, and 9, respectively, the corresponding values of k are 4, 3, and 7, respectively. , 6, 5, 5 and 4; When the current frame is in the fifth frame configuration mode, if the values of n are 0, 1, 4, respectively 5, 6, 7, 8 and 9, the corresponding values of k are 3, 11, 8, 7, 6, 6, 5 and 4; When the current frame is in the sixth frame configuration mode, if the values of n are 0, 1, 3, 4, 5, 6, 7, 8, and 9, respectively, the corresponding values of k are 12 respectively. , 11, 9, 8, 7, 6, 5, 4 and 3; When the current frame is in the seventh frame configuration mode, if the values of n are 0, 1, 5, 6, and 9, respectively, the corresponding values of k are 4, 6, 3, 6, and 4, respectively. . The downlink HARQ feedback method according to claim 1, wherein the subframe n is a downlink subframe or a special subframe. A downlink HARQ feedback device for a TDD system, comprising: a receiving module, configured to receive downlink data sent on a subframe n in a current frame; a feedback module, configured to feed back, in the target uplink subframe, the HARQ ACK or the NACK feedback information of the downlink data that is received by the receiving module, where the target uplink subframe is an uplink subframe in the current frame +k or an uplink subframe (n+k)%10 in the next frame adjacent to the current frame, where % is a remainder operator, n is an integer from 0 to 9, and k is a pre-greater than 0 Set the value. The downlink HARQ feedback device according to claim 6, further comprising: a determining module, after the receiving module receives the downlink data sent on the subframe n in the current frame, the feedback module sends the HARQ ACK or NACK feedback information for the downlink data to the target uplink subframe. Determining a frame configuration mode of the current frame before performing feedback; And an obtaining module, configured to acquire the value of the k according to the value of n and the frame configuration mode determined by the determining module. The downlink HARQ feedback apparatus according to claim 6 or 7, wherein the value of k is an integer greater than or equal to 3, and the HARQ delay of the TDD system is at least 3 ms. The downlink HARQ feedback device according to claim 8, wherein the obtaining module is specifically configured to: When the current frame is in the first frame configuration mode, if the values of n are 0, 1, 5, and 6, respectively, the corresponding values of k are all 3; When the current frame is in the second frame configuration mode, if the values of n are 0, 1, 4, 5, 6, and 9, respectively, the corresponding values of k are 3, 6, 3, and 3, respectively. , 6 and 3; When the current frame is in the third frame configuration mode, if the values of n are 0, 1, 3, 4, 5, 6, 8, and 9, respectively, the corresponding values of k are 7, 6 respectively. , 4, 3, 7, 6, 4 and 3; When the current frame is in the fourth frame configuration mode, if the values of n are 0, 1, 5, 6, 7, 8, and 9, respectively, the corresponding values of k are 4, 3, and 7, respectively. , 6, 5, 5 and 4; When the current frame is in the fifth frame configuration mode, if the values of n are 0, 1, 4, 5, 6, 7, 8, and 9, respectively, the corresponding values of k are 3, 11 respectively. , 8, 7, 6, 6, 5, and 4; When the current frame is in the sixth frame configuration mode, if the values of n are 0, 1, 3, 4, 5, 6, 7, 8, and 9, respectively, the corresponding values of k are 12 respectively. , 11, 9, 8, 7, 6, 5, 4 and 3; When the current frame is in the seventh frame configuration mode, if the values of n are 0, 1, 5, 6, and 9, respectively, the corresponding values of k are 4, 6, 3, 6, and 4, respectively. . The downlink HARQ feedback apparatus according to claim 6, wherein the subframe n is a downlink subframe or a special subframe. A computer device, comprising: a processor, the processor for performing downlink HARQ feedback of the TDD system according to any one of claims 1 to 5 when executing a computer program stored in a memory The steps of the method. A computer storage medium having stored thereon computer instructions, wherein the computer instructions are executed by a processor to perform the steps of the downlink HARQ feedback method of the TDD system of any one of claims 1 to 5.

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