CN111294168B - HARQ-ACK codebook feedback method, user terminal and computer readable storage medium - Google Patents
HARQ-ACK codebook feedback method, user terminal and computer readable storage medium Download PDFInfo
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- CN111294168B CN111294168B CN201910361839.0A CN201910361839A CN111294168B CN 111294168 B CN111294168 B CN 111294168B CN 201910361839 A CN201910361839 A CN 201910361839A CN 111294168 B CN111294168 B CN 111294168B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- 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
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/1887—Scheduling and prioritising arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
- H04L5/0055—Physical resource allocation for ACK/NACK
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Abstract
A HARQ-ACK codebook feedback method, a user terminal and a computer readable storage medium, the method comprising: acquiring a set of uplink time slots associated with PDSCHs needing to be fed back in a target time slot; the set of uplink time slots comprises a configured K1 set and the number of the expanded uplink time slots; k1 is used for indicating the time slot number of the time interval between the downlink data and the HARQ-ACK feedback; the extended uplink time slot is an uplink time slot corresponding to the current COT or an uplink time slot corresponding to the previous COT; determining a set of downlink time slots according to the set of uplink time slots and the intervals of uplink and downlink subcarriers; and generating and sending a corresponding HARQ-ACK codebook according to the set of the downlink time slots. The scheme can determine the specific numerical value of K1 through the existing semi-static codebook generation parameters.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a HARQ-ACK codebook feedback method, a user terminal, and a computer-readable storage medium.
Background
Hybrid Automatic Repeat reQuest (HARQ) is a technology combining Forward Error Correction (FEC) and Automatic Repeat reQuest (ARQ) methods. The receiving end usually uses Cyclic Redundancy Check (CRC) to detect whether the received data packet is erroneous. If no error exists, the receiving end sends a positive Acknowledgement (ACK) to the sending end, and the sending end sends the next data packet after receiving the ACK; if the data packet is wrong, the receiving end discards the received data packet and sends a Negative Acknowledgement (NACK) to the sending end, and the sending end resends the same data after receiving the NACK.
Downlink Control Information (DCI) formats of a Downlink scheduling Physical Downlink Shared Channel (PDSCH) in a New Radio (NR) include DCI format 1_0 and DCI format 1_1. All DCI formats include a time domain resource allocation (time domain resource allocation) field for notifying a user terminal of a PDSCH time domain resource location.
When generating the NR semi-static HARQ-ACK codebook, first, a set M of possible positions of the PDSCH is determined, and factors affecting M include a value range of K1, time domain resource allocation configuration, uplink and downlink Subcarrier Spacing (SCS), semi-static uplink and downlink frame structure configuration, and the like. If the DCI format 1_1 is adopted to schedule the PDSCH, the set of K1 is configured by a high-level signaling; if PDSCH is scheduled by DCI format 1_0, the set of K1 is fixed to {1,2,3,4,5,6,7,8}, K1 is a parameter of Physical Uplink Control Channel (PUCCH), and its corresponding SCS is the SCS of PUCCH. And determining a set K1DL of K1 corresponding to the downlink according to the uplink and downlink SCS configuration.
NR supports HARQ-ACK of downlink data fed back in an unlicensed band. Before the channel is preempted in the unlicensed frequency band, listen Before Talk (LBT) is performed, and after the LBT succeeds, the channel can be occupied to send data, otherwise, the data cannot be sent, so that the feedback time of HARQ-ACK of downlink data in the unlicensed frequency band may be uncertain.
A special value is defined in NR-U (NR-unsolicited band) to indicate that K1 of a certain PDSCH is uncertain, and a specific K1 indication will be signaled to the terminal at a later time, so that the value of K1 cannot be determined by the existing semi-static codebook generation parameters.
Disclosure of Invention
The embodiment of the invention solves the problem that the set of K1 can not be determined by the generation parameters of the existing semi-static codebook.
In order to solve the above technical problem, an embodiment of the present invention provides a HARQ-ACK codebook feedback method, including: acquiring a set of uplink time slots associated with PDSCHs needing to be fed back in a target time slot; the set of uplink time slots comprises a configured K1 set and the number of the expanded uplink time slots; the K1 set is used for indicating the time slot number of the time interval between the downlink data and the HARQ-ACK feedback; the extended uplink time slot is an uplink time slot corresponding to the current COT or an uplink time slot corresponding to the previous COT; determining a set of downlink time slots according to the set of uplink time slots and the intervals of uplink and downlink subcarriers; and generating and sending a corresponding HARQ-ACK codebook according to the set of the downlink time slots.
Optionally, when the extended uplink timeslot is an uplink timeslot corresponding to a previous COT, the generating a corresponding HARQ-ACK codebook according to the set of downlink timeslots includes: receiving feedback indication information, wherein the feedback indication information is used for indicating whether to feed back the PDSCH of the previous COT or not; and determining whether to add the HARQ-ACK feedback of the PDSCH corresponding to the expanded uplink time slot in the HARQ-ACK codebook according to the indication of the feedback indication information.
Optionally, the receiving feedback indication information includes: and receiving downlink control information, and acquiring the feedback indication information from the downlink control information.
Optionally, the acquiring the set of uplink timeslots associated with the PDSCH that needs to be fed back in the target timeslot includes: receiving a high-level signaling; and acquiring the configured K1 set and the number of the expanded uplink time slots from the high-level signaling.
Optionally, the acquiring the set of uplink timeslots associated with the PDSCH that needs to be fed back in the target timeslot includes: receiving a high-level signaling, and acquiring the configured K1 set from the high-level signaling; and receiving downlink control information, and acquiring the number of the expanded uplink time slots from the downlink control information.
Optionally, the obtaining the set of uplink timeslots from the downlink control information includes: and acquiring PRI from the downlink control information, wherein the PRI is used for indicating the number of the extended uplink time slots and is configured when the K1 is a non-numerical value.
An embodiment of the present invention further provides a user terminal, including: an obtaining unit, configured to obtain a set of uplink timeslots associated with a PDSCH that needs to be fed back in a target timeslot; the set of the uplink time slots comprises a configured K1 set and the number of the expanded uplink time slots; k1 is used for indicating the time slot number of the time interval between the downlink data and the HARQ-ACK feedback; the extended uplink time slot is an uplink time slot corresponding to the current COT or an uplink time slot corresponding to the previous COT; a determining unit, configured to determine a set of downlink timeslots according to the set of uplink timeslots and the uplink and downlink subcarrier intervals; a generating unit, configured to generate a corresponding HARQ-ACK codebook according to the set of downlink timeslots; a sending unit, configured to send the HARQ-ACK codebook.
Optionally, when the extended uplink timeslot is an uplink timeslot corresponding to a previous COT, the generating unit is configured to receive feedback indication information, where the feedback indication information is used to indicate whether to feed back the PDSCH of the previous COT; and determining whether to add HARQ-ACK feedback of the PDSCH corresponding to the extended uplink time slot in the HARQ-ACK codebook according to the indication of the feedback indication information.
Optionally, the generating unit is configured to receive downlink control information, and obtain the feedback indication information from the downlink control information.
Optionally, the obtaining unit is configured to receive a high-level signaling, and obtain the configured K1 set and the number of the extended uplink timeslots from the high-level signaling.
Optionally, the obtaining unit is configured to receive a high-level signaling, and obtain the configured K1 set from the high-level signaling; and receiving downlink control information, and acquiring the number of the expanded uplink time slots from the downlink control information.
Optionally, the obtaining unit is configured to obtain a PRI from the downlink control information, where the PRI is used to indicate the number of the extended uplink timeslots, and the PRI is configured when the K1 is a non-numerical value.
The embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium is a non-volatile storage medium or a non-transitory storage medium, and has computer instructions stored thereon, and when the computer instructions are executed, the method performs any of the above steps of the HARQ-ACK codebook feedback method.
The embodiment of the present invention further provides another user terminal, which includes a memory and a processor, where the memory stores a computer instruction that can be executed on the processor, and the processor executes any of the above steps of the HARQ-ACK codebook feedback method when executing the computer instruction.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
acquiring a set of uplink time slots associated with a PDSCH (physical downlink shared channel) needing to be fed back in a target time slot, wherein the set of the uplink time slots comprises a configured K1 set and the number of expanded uplink time slots; and determining a set of downlink time slots according to the set of uplink time slots and the interval of uplink and downlink subcarriers, and further generating and sending a corresponding HARQ-ACK codebook. By indicating the number of the uplink time slots for expansion in the set of the uplink time slots, the user terminal can acquire the number of the expanded uplink time slots and generate a corresponding HARQ-ACK codebook.
Drawings
Fig. 1 is a flowchart of a HARQ-ACK codebook feedback method in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a user terminal in an embodiment of the present invention.
Detailed Description
In the prior art, a special value is defined in NR-U to indicate that K1 of a PDSCH is uncertain, and a specific K1 indication is signaled to a user terminal at a later time, so that the value of K1 cannot be determined by the existing semi-static codebook generation parameters.
In the embodiment of the invention, a set of uplink time slots associated with a PDSCH needing to be fed back in a target time slot is obtained, wherein the set of the uplink time slots comprises a configured K1 set and the number of expanded uplink time slots; and determining a set of downlink time slots according to the set of uplink time slots and the interval of uplink and downlink subcarriers, and further generating and sending a corresponding HARQ-ACK codebook. The number of the uplink time slots for expansion is indicated in the set of the uplink time slots, so that the user terminal can acquire the number of the uplink time slots for expansion and generate a corresponding HARQ-ACK codebook.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
An embodiment of the present invention provides a HARQ-ACK codebook feedback method, which is described in detail below with reference to fig. 1 through specific steps.
Step S101, a set of uplink timeslots associated with the PDSCH that needs to be fed back in the target timeslot is acquired.
In a specific implementation, the set of uplink timeslots associated with the PDSCH that the target timeslot needs to be fed back may include: k1 sets and the number of extended uplink timeslots, wherein: the K1 set may be used to indicate the number of Time slots of a Time interval between downlink data and HARQ-ACK feedback thereof, and the extended uplink Time slot may be an uplink Time slot corresponding to current Channel Occupancy Time (COT) or an uplink Time slot corresponding to a previous COT.
In a specific implementation, when the extended uplink timeslot is an uplink timeslot corresponding to a previous COT, the base station may send feedback indication information to the user terminal, where the feedback indication information may be used to indicate whether the user terminal feeds back the PDSCH of the previous COT. After receiving the feedback indication information sent by the base station, the user terminal analyzes the feedback indication information, and can determine whether to feed back the PDSCH of the previous COT.
In the embodiment of the invention, the user terminal can determine whether to add the HARQ-ACK feedback of the PDSCH corresponding to the extended uplink time slot in the HARQ-ACK codebook according to the indication of the feedback indication information. Specifically, when the feedback indication information indicates that the PDSCH of the previous COT is fed back, the HARQ-ACK feedback of the PDSCH of the previous COT is added in the generated HARQ-ACK codebook; on the contrary, when the feedback indication information indicates that the PDSCH of the previous COT is not fed back, the HARQ-ACK feedback of the PDSCH of the previous COT does not need to be increased in the generated HARQ-ACK codebook.
In a specific implementation, the base station may send feedback indication Information to the ue through Downlink Control Information (Downlink Control Information). After receiving the feedback indication information, the user terminal analyzes the feedback indication information, and then knows whether the base station indicates to feed back the PDSCH of the previous COT.
In specific implementation, the base station may configure, through the high-level signaling, a set of uplink timeslots associated with the PDSCH that needs to be fed back in the target timeslot, and send the high-level signaling to the user terminal. After receiving the high-level signaling sent by the base station, the user terminal can obtain the set of uplink time slots associated with the PDSCH needing to be fed back in the target time slot.
In a specific implementation, the base station may also configure, through high-level signaling, a K1 set corresponding to the PDSCH that needs to be fed back in the target timeslot, and indicate the number of extended uplink timeslots to the user terminal through DCI. After receiving the high-level signaling, the user terminal can acquire a K1 set corresponding to the PDSCH needing to be fed back in the target time slot; after receiving the DCI, the number of extended uplink timeslots can be known, so that the set of uplink timeslots associated with the PDSCH that needs to be fed back in the target timeslot is known.
That is to say, in the embodiment of the present invention, when configuring the set of uplink timeslots for the user equipment, the base station configures the K1 set and the number of extended uplink timeslots, so that the user equipment knows the number of K1 set and the number of extended uplink timeslots, and determines the set of downlink timeslots and generates the HARQ-ACK codebook.
A PUCCH Resource Indicator (PRI) indicates a PUCCH Resource for feeding back HARQ-ACK feedback of the scheduled PDSCH. When K1 is a non-numerical value, the user terminal cannot determine a specific HARQ-ACK feedback time, and therefore cannot determine a PUCCH resource fed back by the HARQ-ACK, and at this time, the PRI indicates that the PUCCH is an invalid indication.
In a specific implementation, to indicate the number of extended uplink timeslots, the base station may configure an extended set of the number of uplink timeslots for the ue in advance through a high-level signaling. For different COTs, the number sets of the extended uplink timeslots configured by the base station may be the same or different. That is, for different COTs, the base station may configure the same extended set of the number of uplink timeslots, or may configure different extended sets of the number of uplink timeslots.
The base station may indicate one element in the extended set of the number of uplink slots to the user terminal through the DCI. The base station may introduce a new field in the DCI, and indicate to the ue a certain element in the extended set of uplink timeslot numbers.
The base station may also reuse the PRI field to indicate one element in the extended set of uplink slot numbers, which is applicable to the case where K1 is a non-numerical value, because the PUCCH resource indicated by the PRI is an invalid indication when K1 is a non-numerical value. When the user terminal receives the DCI and detects that the K1 indication is a non-numerical value, the PRI in the DCI is used for indicating the number of the extended uplink time slots.
In a specific implementation, when the extended uplink timeslot is an uplink timeslot corresponding to a previous COT, the base station may directly configure the number of PDSCHs that need to be fed back by the previous COT, or configure the number of timeslots in which PDSCHs that need to be fed back by the previous COT are located. When one time slot corresponds to only one PDSCH, the number of PDSCHs is equal to the number of time slots.
And step S102, determining a set of downlink time slots according to the set of uplink time slots and the interval of uplink and downlink subcarriers.
In a specific implementation, after acquiring the set of uplink timeslots, the user terminal may determine the set of downlink timeslots according to the uplink and downlink subcarrier intervals. For details, the principle and the calculation process of how to determine the set of downlink timeslots according to the set of uplink timeslots may refer to the prior art, and details are not described in the embodiments of the present invention.
And step S103, generating a corresponding HARQ-ACK codebook according to the set of the downlink time slots and sending the HARQ-ACK codebook.
In specific implementation, after acquiring the set of downlink timeslots, the user terminal may generate a corresponding HARQ-ACK codebook and send the generated HARQ-ACK codebook to the base station.
The HARQ-ACK codebook feedback method provided in the above embodiments of the present invention is described below by specific examples.
Example 1
The user terminal is configured with a semi-static codebook. The base station configures the set of K1 to be { TBD,2,3,4,5,6,7,8} through higher layer signaling, the TBD indicating that K1 for the PDSCH will be determined some time later. The time domain resource allocation is shown in the following table:
TABLE 1 time domain resource Allocation Table
| Index | Starting OFDM symbol | OFDM symbol length |
| 0 | 0 | 14 |
The interval between the uplink and downlink sub-carriers is 15KHz, that is, the length of the uplink time slot is equal to that of the downlink time slot. Each PDSCH is fed back with 1 bit. The number of uplink timeslots configured and extended by the base station through the high-level signaling is 4, and therefore, in timeslot n, timeslot n-12, timeslot n-11, \8230;, timeslot n-2 need to be fed back, 11 bits are needed in total, that is, the length of the generated HARQ-ACK codebook is 11 bits, where: the first bit corresponds to the PDSCH of time slot n-12, the second bit corresponds to the PDSCH of time slot n-11, and so on, the 11 th bit corresponds to the PDSCH of time slot n-2. The feedback NACK, which is not received PDSCH or PDSCH decoding error, is represented by 0 in the HARQ-ACK codebook. The successful decoding of the PDSCH feeds back ACK, which is indicated by 1 in the HARQ-ACK codebook.
Example two
The user terminal configures a semi-static codebook. The base station configures the set of K1 to be { TBD,2,3,4,5,6,7,8} through higher layer signaling, the TBD indicating that K1 for the PDSCH will be determined some time later. The time domain resource allocation is shown in table 1 above.
The interval of the uplink and downlink sub-carriers is 15KHz, namely the length of the uplink time slot is equal to that of the downlink time slot. Each PDSCH is fed back with 1 bit. The value range of the number of the extended uplink time slots configured by the base station through the high-level signaling is {2,4,6 and 8}.
The user terminal receives a DCI scheduling PDSCH in time slot n-12, time slot n-11, time slot n-10 and time slot n-9, wherein the indication K1 is TBD, and the number of the extended uplink time slots is 4.
The user terminal receives one DCI scheduling one PDSCH in time slot n-8, where K1 is indicated as 8. The user terminal receives one DCI scheduling one PDSCH in slot n-2, where K1 is indicated as 2. All PDSCHs are decoded successfully. The user terminal needs to feed back to the time slot n-12, the time slot n-11, \8230;, the time slot n-2 in the time slot n, and totally 11 bits are needed, that is, the length of the generated HARQ-ACK codebook is 11 bits, wherein: the first bit corresponds to the PDSCH of time slot n-12, the second bit corresponds to the PDSCH of time slot n-11, and so on, with the 11 th bit corresponding to the PDSCH of time slot n-2. The generated semi-static codebook is 11011000001, no feedback NACK of decoding error of PDSCH or PDSCH is received, and 0 is used for representing in an HARQ-ACK codebook. The successful decoding of the PDSCH feeds back ACK which is indicated by 1 in an HARQ-ACK codebook.
Example three
The user terminal is configured with a semi-static codebook. The base station configures the set of K1 to be { TBD,2,3,4,5,6,7,8} through higher layer signaling, the TBD indicating that K1 for the PDSCH will be determined some time later. The time domain resource allocation is shown in table 1 above.
The interval of the uplink and downlink sub-carriers is 15KHz, namely the length of the uplink time slot is equal to that of the downlink time slot. Each PDSCH is fed back with 1 bit. The maximum value of the number of the extended uplink time slots configured by the base station through the high-level signaling is 8. At this time, the number of extended uplink timeslots configured by the base station is {1,2,3,4,5,6,7,8}.
The user terminal receives a DCI scheduling PDSCH in time slot n-12, time slot n-11, time slot n-10 and time slot n-9, wherein the indication K1 is TBD, and the number of the extended uplink time slots is 4.
The user terminal receives one DCI scheduling one PDSCH in slot n-8, where K1 is indicated as 8. The user terminal receives one DCI scheduling one PDSCH in time slot n-2, where K1 is indicated as 2. All PDSCHs are decoded successfully. The user terminal needs to feed back to the time slot n-12, the time slot n-11, \8230;, the time slot n-2 in the time slot n, and totally 11 bits are needed, that is, the length of the generated HARQ-ACK codebook is 11 bits, wherein: the first bit corresponds to the PDSCH of time slot n-12, the second bit corresponds to the PDSCH of time slot n-11, and so on, the 11 th bit corresponds to the PDSCH of time slot n-2. The generated semi-static codebook is 11011000001, no feedback NACK of decoding error of PDSCH or PDSCH is received, and 0 is used for representing in an HARQ-ACK codebook. The successful decoding of the PDSCH feeds back ACK which is indicated by 1 in an HARQ-ACK codebook.
Example four
The user terminal is configured with a semi-static codebook. The base station configures a set of K1 as { TBD,2,3,4,5,6,7,8} through higher layer signaling, the TBD indicating that K1 of the PDSCH will be determined some time later. The time domain resource allocation is shown in table 1 above.
The interval of the uplink and downlink sub-carriers is 15KHz, namely the length of the uplink time slot is equal to that of the downlink time slot. Each PDSCH is fed back with 1 bit. The base station configures the number of the extended uplink time slots to be 4 through high-level signaling.
The user terminal performs feedback in timeslot n-8, timeslot n-7, \8230;, timeslot n-2 of COT2, and also needs to perform feedback on the last 4 downlink timeslots of the previous COT (i.e. COT 1).
The user terminal receives a DCI scheduling a PDSCH in slot n-8 of COT2, where K1 is indicated as 8. It is indicated by 1 bit in DCI that no feedback on COT1 is required.
The user terminal receives a DCI scheduling a PDSCH in slot n-2 of COT2, where K1 is indicated as 2. It is indicated by 1 bit in DCI that no feedback on COT2 is required.
All PDSCHs are successfully decoded.
The user terminal needs to feed back to a time slot n-8, a time slot n-7, \8230 \ 8230;, a time slot n-2 of the COT2 in a time slot n of the COT2, and totally needs 7 bits, that is, the length of the generated HARQ-ACK codebook is 7 bits, wherein: the first bit corresponds to the PDSCH of time slot n-8, the second bit corresponds to the PDSCH of time slot n-7, and so on, and the seventh bit corresponds to the PDSCH of time slot n-2. The generated semi-static codebook is 1000010, and a feedback NACK of a PDSCH or a PDSCH decoding error is not received, and is represented by 0 in the HARQ-ACK codebook. The successful decoding of the PDSCH feeds back ACK, which is indicated by 1 in the HARQ-ACK codebook.
Example five
The user terminal is configured with a semi-static codebook. The base station configures the set of K1 to be { TBD,2,3,4,5,6,7,8} through higher layer signaling, the TBD indicating that K1 for the PDSCH will be determined some time later. The time domain resource allocation is shown in table 1 above.
The interval of the uplink and downlink sub-carriers is 15KHz, namely the length of the uplink time slot is equal to that of the downlink time slot. Each PDSCH is fed back with 1 bit. The base station configures the number of the expanded uplink time slots to be 4 through high-level signaling.
The user terminal feeds back in the timeslot n-8, timeslot n-7, \8230;, timeslot n-2 of the COT2, and also needs to feed back the last 4 downlink timeslots of the COT 1.
And the user terminal receives a DCI scheduling PDSCH at the last downlink time slot of the COT1, wherein the indication of K1 is TBD. The user terminal receives a DCI scheduling a PDSCH in slot n-8 of COT2, where K1 is indicated as 8. The previous COT needs to be fed back is indicated by one bit in the DCI.
The user terminal receives a DCI scheduling a PDSCH in slot n-2 of COT2, where K1 is indicated as 2. The need to feed back the previous COT is indicated by one bit in the DCI.
All PDSCHs are successfully decoded.
The user terminal needs to feed back to the timeslot n-8, timeslot n-7, \ 8230 \ 8230;, timeslot n-2 of COT2 and the last 4 downlink timeslots of COT1 in the timeslot n of COT2, which totally needs 11 bits. According to the time sequence, the first bit corresponds to a PDSCH of a 4 th last downlink time slot of COT1, the second bit corresponds to a PDSCH of a 3 rd last downlink time slot of COT1, the third bit corresponds to a PDSCH of a 2 nd last downlink time slot of COT1, the fourth bit corresponds to a PDSCH of a 1 st last downlink time slot of COT1, the fifth bit corresponds to a PDSCH of a time slot n-8 of COT2, the sixth bit corresponds to a PDSCH of a time slot n-7 of COT2, the seventh bit corresponds to a PDSCH of a time slot n-6 of COT2, the eighth bit corresponds to a PDSCH of a time slot n-5 of COT2, the ninth bit corresponds to a PDSCH of a time slot n-4 of COT2, the tenth bit corresponds to a PDSCH of a time slot n-3 of COT2, and the eleventh bit corresponds to a PDSCH of a time slot n-2 of COT 2. The generated semi-static codebook is 00011000001, and the feedback NACK of the PDSCH or PDSCH decoding error is not received and is represented by 0 in the HARQ-ACK codebook. The successful decoding of the PDSCH feeds back ACK, which is indicated by 1 in the HARQ-ACK codebook.
Example six
The user terminal is configured with a semi-static codebook. The base station configures the set of K1 to be { TBD,2,3,4,5,6,7,8} through higher layer signaling, the TBD indicating that K1 for the PDSCH will be determined some time later. The time domain resource allocation is shown in table 1 above.
The interval of the uplink and downlink sub-carriers is 15KHz, namely the length of the uplink time slot is equal to that of the downlink time slot. Each PDSCH is fed back with 1 bit. And the base station indicates the number of uplink time slots needing to be fed back at the next COT in the current COT through the DCI by reusing the PRI. The number set of uplink timeslots to be fed back by the next COT at the current COT configured by the base station through the high-level signaling is {2,4,6,8}. For the next COT, the number of uplink timeslots to be fed back at the next COT in the current COT is the number of extended uplink timeslots.
The user terminal receives a DCI at the last downlink time slot of COT1 to schedule a PDSCH, where K1 indicates TBD and PRI indicates 4, that is, feedback needs to be performed on the last 4 downlink time slots of COT1 at COT 2.
The user terminal receives a DCI scheduling a PDSCH at time slot n-8 of COT2, where K1 is indicated as 8. The previous COT needs to be fed back is indicated by one bit in the DCI.
The user terminal receives a DCI scheduling a PDSCH in slot n-2 of COT2, where K1 is indicated as 2. The need to feed back the previous COT is indicated by one bit in the DCI.
All PDSCHs are successfully decoded.
The user terminal needs to feed back to the timeslot n-8, timeslot n-7, \ 8230 \ 8230;, timeslot n-2 of COT2 and the last 4 downlink timeslots of COT1 in the timeslot n of COT2, which totally needs 11 bits. According to the time sequence, the first bit corresponds to a PDSCH of a 4 th last downlink time slot of COT1, the second bit corresponds to a PDSCH of a 3 rd last downlink time slot of COT1, the third bit corresponds to a PDSCH of a 2 nd last downlink time slot of COT1, the fourth bit corresponds to a PDSCH of a 1 st last downlink time slot of COT1, the fifth bit corresponds to a PDSCH of a time slot n-8 of COT2, the sixth bit corresponds to a PDSCH of a time slot n-7 of COT2, the seventh bit corresponds to a PDSCH of a time slot n-6 of COT2, the eighth bit corresponds to a PDSCH of a time slot n-5 of COT2, the ninth bit corresponds to a PDSCH of a time slot n-4 of COT2, the tenth bit corresponds to a PDSCH of a time slot n-3 of COT2, and the eleventh bit corresponds to a PDSCH of a time slot n-2 of COT 2. The generated semi-static codebook is 00011000001, and the feedback NACK of the PDSCH or PDSCH decoding error is not received and is represented by 0 in the HARQ-ACK codebook. The successful decoding of the PDSCH feeds back ACK which is indicated by 1 in an HARQ-ACK codebook.
Referring to fig. 2, a user terminal 20 in the embodiment of the present invention is provided, including: an acquisition unit 201, a determination unit 202, a generation unit 203, and a transmission unit 204, wherein:
an obtaining unit 201, configured to obtain a set of uplink timeslots associated with a PDSCH that needs to be fed back in a target timeslot; the set of the uplink time slots comprises a configured K1 set and the number of the expanded uplink time slots; k1 is used for indicating the time slot number of the time interval between the downlink data and the HARQ-ACK feedback; the extended uplink time slot is an uplink time slot corresponding to the current COT or an uplink time slot corresponding to the previous COT;
a determining unit 202, configured to determine a set of downlink timeslots according to the set of uplink timeslots and the uplink and downlink subcarrier intervals;
a generating unit 203, configured to generate a corresponding HARQ-ACK codebook according to the set of downlink timeslots;
a sending unit 204, configured to send the HARQ-ACK codebook.
In a specific implementation, when the extended uplink timeslot is an uplink timeslot corresponding to a previous COT, the generating unit 203 may be configured to receive feedback indication information, where the feedback indication information is used to indicate whether to feed back a PDSCH of the previous COT; and determining whether to add the HARQ-ACK feedback of the PDSCH corresponding to the expanded uplink time slot in the HARQ-ACK codebook according to the indication of the feedback indication information.
In a specific implementation, the generating unit 203 may be configured to receive downlink control information, and obtain the feedback indication information from the downlink control information.
In a specific implementation, the obtaining unit 201 may be configured to receive a higher layer signaling, and obtain the configured K1 set and the number of the extended uplink timeslots from the higher layer signaling.
In a specific implementation, the obtaining unit 201 may be configured to receive a higher layer signaling, and obtain the configured K1 set from the higher layer signaling; and receiving downlink control information, and acquiring the number of the expanded uplink time slots from the downlink control information.
In a specific implementation, the obtaining unit 201 may be configured to obtain a PRI from the downlink control information, where the PRI is used to indicate the number of the extended uplink timeslots, and the PRI is configured when the K1 is a non-numerical value.
An embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium is a non-volatile storage medium or a non-transitory storage medium, and computer instructions are stored on the computer-readable storage medium, and when the computer instructions are executed, the steps of the HARQ-ACK codebook feedback method according to any of the above embodiments of the present invention are executed.
The embodiment of the present invention further provides another user terminal, which includes a memory and a processor, where the memory stores a computer instruction that can be executed on the processor, and the processor executes the steps of the HARQ-ACK codebook feedback method according to any of the above embodiments of the present invention when executing the computer instruction.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by instructing the relevant hardware through a program, which may be stored in a computer-readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (14)
1. A HARQ-ACK codebook feedback method is characterized by comprising the following steps:
acquiring a set of uplink time slots associated with PDSCHs needing to be fed back in a target time slot; the set of the uplink time slots comprises a configured K1 set and the number of the expanded uplink time slots; k1 is used for indicating the time slot number of the time interval between the downlink data and the HARQ-ACK feedback; the extended uplink time slot is an uplink time slot corresponding to the current COT or an uplink time slot corresponding to the previous COT;
determining a set of downlink time slots according to the set of uplink time slots and the intervals of uplink and downlink subcarriers;
and generating and sending a corresponding HARQ-ACK codebook according to the set of the downlink time slots.
2. The HARQ-ACK codebook feedback method of claim 1, wherein when the extended uplink timeslot is an uplink timeslot corresponding to a previous COT, the generating a corresponding HARQ-ACK codebook according to the set of downlink timeslots comprises:
receiving feedback indication information, wherein the feedback indication information is used for indicating whether to feed back the PDSCH of the previous COT or not;
and determining whether to add HARQ-ACK feedback of the PDSCH corresponding to the extended uplink time slot in the HARQ-ACK codebook according to the indication of the feedback indication information.
3. The HARQ-ACK codebook feedback method according to claim 2, wherein said receiving feedback indication information comprises:
and receiving downlink control information, and acquiring the feedback indication information from the downlink control information.
4. The HARQ-ACK codebook feedback method of claim 1, wherein said obtaining the set of uplink timeslots associated with the PDSCH that needs to be fed back in the target timeslot comprises:
receiving a high-level signaling;
and acquiring the configured K1 set and the number of the expanded uplink time slots from the high-level signaling.
5. The HARQ-ACK codebook feedback method according to claim 1, wherein said obtaining the set of uplink timeslots associated with the PDSCH that needs to be fed back at the target timeslot comprises:
receiving a high-level signaling, and acquiring the configured K1 set from the high-level signaling;
and receiving downlink control information, and acquiring the number of the expanded uplink time slots from the downlink control information.
6. The HARQ-ACK codebook feedback method of claim 5, wherein said obtaining the number of said extended uplink timeslots from said downlink control information comprises:
and acquiring a PRI from the downlink control information, wherein the PRI is used for indicating the number of the extended uplink time slots, and the PRI is configured when the K1 is a non-numerical value.
7. A user terminal, comprising:
an obtaining unit, configured to obtain a set of uplink timeslots associated with a PDSCH that needs to be fed back in a target timeslot; the set of the uplink time slots comprises a configured K1 set and the number of the expanded uplink time slots; k1 is used for indicating the time slot number of the time interval between the downlink data and the HARQ-ACK feedback; the extended uplink time slot is an uplink time slot corresponding to the current COT or an uplink time slot corresponding to the previous COT;
a determining unit, configured to determine a set of downlink timeslots according to the set of uplink timeslots and the uplink and downlink subcarrier intervals;
a generating unit, configured to generate a corresponding HARQ-ACK codebook according to the set of downlink timeslots;
a sending unit, configured to send the HARQ-ACK codebook.
8. The ue of claim 7, wherein when the extended uplink timeslot is an uplink timeslot corresponding to a previous COT, the generating unit is configured to receive feedback indication information, where the feedback indication information is used to indicate whether to feedback the PDSCH of the previous COT; and determining whether to add the HARQ-ACK feedback of the PDSCH corresponding to the expanded uplink time slot in the HARQ-ACK codebook according to the indication of the feedback indication information.
9. The ue of claim 8, wherein the generating unit is configured to receive downlink control information, and obtain the feedback indication information from the downlink control information.
10. The ue of claim 7, wherein the obtaining unit is configured to receive a higher layer signaling, and obtain the configured K1 set and the number of the extended uplink timeslots from the higher layer signaling.
11. The ue of claim 7, wherein the obtaining unit is configured to receive a higher layer signaling, and obtain the configured K1 set from the higher layer signaling; and receiving downlink control information, and acquiring the number of the expanded uplink time slots from the downlink control information.
12. The ue of claim 11, wherein the obtaining unit is configured to obtain a PRI from the downlink control information, where the PRI is used to indicate the number of the extended uplink timeslots, and the PRI is configured when the K1 is a non-numerical value.
13. A computer readable storage medium being a non-volatile storage medium or a non-transitory storage medium having stored thereon computer instructions, which when executed by a processor, perform the steps of the HARQ-ACK codebook feedback method of any of claims 1 to 6.
14. A user terminal comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the HARQ-ACK codebook feedback method according to any of claims 1 to 6.
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| CN113271180B (en) * | 2020-02-14 | 2023-05-23 | 华为技术有限公司 | Feedback method of hybrid automatic repeat request (HARQ) bitmap information and related equipment |
| CN114070491B (en) * | 2020-08-07 | 2023-01-20 | 大唐移动通信设备有限公司 | Method and device for determining semi-static feedback codebook and storage medium |
| WO2022028410A1 (en) * | 2020-08-07 | 2022-02-10 | 大唐移动通信设备有限公司 | Method and apparatus for determining semi-static feedback codebook, and storage medium |
| WO2022056725A1 (en) * | 2020-09-16 | 2022-03-24 | Oppo广东移动通信有限公司 | Channel feedback method, terminal device and network device |
| US20240048291A1 (en) * | 2020-12-24 | 2024-02-08 | Beijing Xiaomi Mobile Software Co., Ltd. | Harq feedback method and device, and storage medium |
| US20240305432A1 (en) * | 2021-02-26 | 2024-09-12 | Beijing Xiaomi Mobile Software Co., Ltd. | Method for determining transmission parameter, method for sending harq-ack, apparatus, device, and medium |
| JP2024508028A (en) * | 2021-03-04 | 2024-02-21 | 北京小米移動軟件有限公司 | Method, device, equipment and storage medium for transmitting and receiving HARQ-ACK |
| CN115174019B (en) * | 2021-04-06 | 2024-05-14 | 维沃移动通信有限公司 | Codebook setting and receiving method and device, terminal and network side equipment |
| CN113452485B (en) * | 2021-06-28 | 2022-07-19 | 中信科移动通信技术股份有限公司 | Method and system for realizing downlink HARQ feedback mechanism |
| WO2024082355A1 (en) * | 2022-11-07 | 2024-04-25 | Lenovo (Beijing) Limited | Method and apparatus for type-1 harq-ack codebook determination |
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