CN115174004A - Hybrid automatic repeat request feedback transmission method, terminal, base station and communication system - Google Patents

Hybrid automatic repeat request feedback transmission method, terminal, base station and communication system Download PDF

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Publication number
CN115174004A
CN115174004A CN202110366896.5A CN202110366896A CN115174004A CN 115174004 A CN115174004 A CN 115174004A CN 202110366896 A CN202110366896 A CN 202110366896A CN 115174004 A CN115174004 A CN 115174004A
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China
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carrier
harq feedback
time unit
indicated
pdsch
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Chinese (zh)
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南方
朱剑驰
佘小明
陈鹏
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China Telecom Corp Ltd
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China Telecom Corp Ltd
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Priority to CN202110366896.5A priority Critical patent/CN115174004A/en
Priority to PCT/CN2021/115060 priority patent/WO2022213528A1/en
Publication of CN115174004A publication Critical patent/CN115174004A/en
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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
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1671—Details of the supervisory signal the supervisory signal being transmitted together with control information
    • 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
    • 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
    • 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
    • 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
    • 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
    • H04L5/0078—Timing of allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The disclosure provides a hybrid automatic repeat request feedback transmission method, a terminal, a base station and a communication system, and relates to the field of wireless communication. Determining a carrier indicated by DCI or MAC signaling for transmitting HARQ feedback, wherein the HARQ feedback is feedback on a PDSCH or a PDCCH; determining the number K1 of time units which are different from the time unit when the PDSCH or the PDCCH ends to a first time unit, wherein the first time unit is the time unit for starting transmitting the HARQ feedback on a default carrier; and starting to transmit or receive the HARQ feedback in a time unit corresponding to the first time unit on the indicated carrier. Under the scene of a plurality of uplink carriers, the HARQ feedback transmission scheme which indicates the carrier for transmitting the PUCCH through DCI or MAC signaling and determines the time domain position for transmitting the PUCCH on the carrier is enabled to be complete and feasible.

Description

Hybrid automatic repeat request feedback transmission method, terminal, base station and communication system
Technical Field
The present disclosure relates to the field of wireless communications, and in particular, to a method, a terminal, a base station, and a communication system for hybrid automatic repeat request feedback transmission.
Background
For a Physical Downlink Shared Channel (PDSCH) of Semi-Persistent Scheduling (SPS), if there is a feedback timing indicator from the PDSCH to a Hybrid Automatic Repeat Request (HARQ) in its activated Downlink Control Information (DCI), the time domain position of its HARQ feedback is determined by the offset indicated by the feedback timing indicator from the PDSCH to the HARQ carried in its activated DCI. If the PDSCH transmission ends in time slot or sub-time slot n, the corresponding HARQ feedback starts to be transmitted in time slot or sub-time slot n + K1, K1 being the offset indicated by the PDSCH to HARQ feedback timing indicator. If the feedback timing indicator from the PDSCH to the HARQ in the DCI does not exist, K1 is configured by Radio Resource Control (RRC) signaling. HARQ feedback is typically transmitted over a Physical Uplink Control Channel (PUCCH). HARQ feedback, also known as HARQ-ACK feedback, includes an Acknowledgement (ACK) or a Negative Acknowledgement (NACK) for the PDSCH.
Currently, the New air interface (NR) of the fifth Generation mobile Communication technology (5 th Generation mobile networks, 5th Generation wireless systems or 5th-Generation, 5G) introduces a short SPS period (1 slot minimum) for Ultra-reliable and Low Latency Communication (URLLC). In this case, if the time domain position of HARQ-ACK feedback is determined according to the offset indicated by the PDSCH-to-HARQ feedback timing indicator carried in the DCI activating SPS or the offset configured by RRC signaling, the HARQ feedback of SPS PDSCH may often collide with symbols that cannot be used for uplink, and thus the transmission of the HARQ feedback is discarded, resulting in unnecessary PDSCH retransmission.
For the PDSCH dynamically scheduled by DCI ending in the slot or sub-slot n, or the Physical Downlink Control Channel (PDCCH) for SPS PDSCH release ending in the slot or sub-slot n, the PUCCH carrying HARQ feedback begins to transmit in slot or sub-slot n + K1, where K1 is the offset indicated by the PDSCH-to-HARQ feedback timing indicator in the DCI.
If multiple carriers are configured in the uplink, for example, in a scenario of Time Division Duplex (TDD) carrier aggregation with different uplink and downlink configurations, or in a scenario of carrier aggregation of TDD and Frequency Division Duplex (FDD), as shown in fig. 1a, when HARQ feedback collides with a symbol that cannot be used in the uplink within one slot or sub-slot of one carrier, there may be a resource that can perform PUCCH transmission in a corresponding Time domain position of another carrier, so that a carrier transmitting PUCCH may be switched.
Disclosure of Invention
The embodiment of the disclosure provides how to determine a carrier for transmitting the PUCCH and a time domain position of the PUCCH on the carrier in a scene of uplink multiple carriers, so that a HARQ feedback transmission scheme which indicates the carrier for transmitting the PUCCH and determines the time domain position of the PUCCH on the carrier through DCI or MAC signaling is completely feasible. Therefore, the conflict between the HARQ feedback and the symbols which cannot be used for uplink in the TDD system is avoided to a certain degree, the resource waste caused by the retransmission of the PDSCH or the PDCCH due to the discarding of the HARQ feedback is avoided to a certain degree, and the time delay required by the successful transmission of the PDSCH or the PDCCH is reduced.
Some embodiments of the present disclosure provide a method for hybrid automatic repeat request feedback transmission, including: determining a carrier indicated by DCI or MAC signaling for transmitting HARQ feedback, wherein the HARQ feedback is feedback on a PDSCH or a PDCCH; determining the number K1 of time units with a difference from the time unit when the PDSCH or the PDCCH ends to a first time unit, wherein the first time unit is the time unit for starting to transmit the HARQ feedback on a default carrier; starting to transmit or receive the HARQ feedback in a time unit corresponding to the first time unit on the indicated carrier.
In some embodiments, the subcarrier spacing referred to by the time unit with the phase difference is a subcarrier spacing of a default carrier, where the default carrier is a Pcell carrier, or a PScell carrier, or a PUCCH-Scell carrier, or the indicated carrier for transmitting HARQ feedback.
In some embodiments, starting to transmit or receive the HARQ feedback in a time unit corresponding to the first time unit on the indicated carrier comprises: determining a first time unit with a starting time not earlier than the starting time of the first time unit on the default carrier on the indicated carrier as a time unit corresponding to the first time unit.
In some embodiments, if the subcarrier spacing of the carrier where the PDSCH or PDCCH is located is greater than or equal to the subcarrier spacing of the default carrier, the first time unit corresponding to K1 being equal to 0 is a time unit where the default carrier overlaps with the PDSCH or PDSCH; if the subcarrier interval of the carrier where the PDSCH or PDCCH is located is smaller than the subcarrier interval of the default carrier, the first time unit corresponding to the condition that K1 is equal to 0 is the time unit where the PDSCH or PDSCH of the default carrier ends.
In some embodiments, when the default carrier is the indicated carrier for transmitting HARQ feedback, for different carriers for transmitting HARQ feedback, sets of K1 configured by RRC signaling are different, and the number of values of K1 included in the different sets is the same.
In some embodiments, when the default carrier is the indicated carrier for transmitting HARQ feedback, for different carriers for transmitting HARQ feedback, sets of K1 configured by RRC signaling are different, and the number of values of K1 included in the different sets is different; the total bit number of PUCCH resource indicators and PDSCH-to-HARQ feedback timing indicators in the DCI is fixed by a protocol or configured by signaling, and the PDSCH-to-HARQ feedback timing indicators are used for indicating the value of K1 in the set of K1.
In some embodiments, in case that the default carrier is the indicated carrier for transmitting HARQ feedback, the indicated carrier for transmitting HARQ feedback and the K1 are indicated by the same field, or the same information element in the DCI or MAC signaling.
In some embodiments, in a duration of one time unit with a minimum subcarrier spacing as a reference among subcarrier spacings of all carriers that can be used for transmitting HARQ feedback, the carrier used for transmitting HARQ feedback and the K1 are indicated by a first value of the same field, or the same information element; in the duration of a time unit after the minimum subcarrier spacing is taken as a reference, the carrier used for transmitting the HARQ feedback and the K1 are indicated by the same domain, the same field or the second value of the same information element; the second value is greater than the first value.
In some embodiments, determining the number M1 of time units with a phase difference between a time unit at which the PDSCH or PDCCH configured by RRC signaling ends and a second time unit, where the second time unit is a time unit for transmitting HARQ feedback on a carrier with a smallest subcarrier interval in all carriers that can be used for transmitting HARQ feedback, and a subcarrier interval referred to by the phase-difference time unit is the smallest subcarrier interval; the first time unit is included within a duration of the second time unit.
In some embodiments, determining the carrier indicated by the DCI for transmitting the HARQ feedback comprises: determining a PUCCH resource set configured by RRC signaling and a carrier corresponding to each PUCCH resource in the PUCCH resource set; determining a PUCCH resource in the PUCCH resource set indicated by a PUCCH resource indicator in DCI, and determining a carrier corresponding to the indicated PUCCH resource as the indicated carrier for transmitting HARQ feedback.
In some embodiments, determining a carrier indicated by the MAC signaling for transmitting the HARQ feedback comprises: and when the HARQ feedback codebook only comprises the HARQ feedback of the SPS PDSCH, determining the carrier indicated by the MAC signaling and used for transmitting the HARQ feedback.
In some embodiments, K1 counts only HARQ feedback available time units; symbols which cannot be used for uplink transmission are not included in the HARQ feedback available time unit.
In some embodiments, the method when performed by a base station comprises:
determining and indicating a carrier for transmitting HARQ feedback to a terminal through DCI or MAC signaling, wherein the HARQ feedback is feedback on a PDSCH or a PDCCH;
determining and indicating the number K1 of time units with a difference between a time unit when the PDSCH or the PDCCH ends and a first time unit to a terminal, wherein the first time unit is a time unit for starting transmitting the HARQ feedback on a default carrier;
starting to receive the HARQ feedback in a time unit corresponding to the first time unit on the indicated carrier.
In some embodiments, the method when executed by a terminal comprises:
receiving DCI or MAC signaling sent by a base station, and determining a carrier indicated by the DCI or MAC signaling and used for transmitting HARQ feedback, wherein the HARQ feedback is feedback on a PDSCH or a PDCCH;
receiving the number K1 of time units which are indicated by a base station and have a difference from the time unit when the PDSCH or PDCCH ends to a first time unit, and determining the first time unit based on the K1, wherein the first time unit is a time unit for starting to transmit the HARQ feedback on a default carrier;
starting to transmit the HARQ feedback in a time unit corresponding to the first time unit on the indicated carrier.
Some embodiments of the present disclosure provide a terminal, including: a memory; and a processor coupled to the memory, the processor configured to perform a hybrid automatic repeat request feedback transmission method based on instructions stored in the memory, wherein the transmitting or receiving the HARQ feedback is performed.
Some embodiments of the present disclosure provide a base station, including: a memory; and a processor coupled to the memory, the processor configured to perform a hybrid automatic repeat request feedback transmission method based on instructions stored in the memory, wherein the step of transmitting or receiving the HARQ feedback performs an operation of receiving HARQ feedback.
Some embodiments of the present disclosure provide a communication system, including: the aforementioned terminal and the aforementioned base station.
Some embodiments of the present disclosure provide a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of a hybrid automatic repeat request feedback transmission method.
Drawings
The drawings that will be used in the description of the embodiments or the related art will be briefly described below. The present disclosure can be understood more clearly from the following detailed description, which proceeds with reference to the accompanying drawings.
It should be apparent that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived by those of ordinary skill in the art without inventive exercise.
Fig. 1a shows a schematic diagram of switching carriers transmitting PUCCH.
Fig. 1b shows a flow diagram of a HARQ feedback transmission method of some embodiments of the present disclosure.
Fig. 2a illustrates a schematic diagram of a HARQ feedback transmission method one according to some embodiments of the present disclosure.
Fig. 2b is a schematic diagram of a HARQ feedback transmission method one according to another embodiment of the disclosure.
Fig. 3a illustrates a schematic diagram of a HARQ feedback transmission method two according to some embodiments of the present disclosure.
Fig. 3b illustrates a schematic diagram of DCI bits in a HARQ feedback transmission method two according to some embodiments of the present disclosure.
Fig. 4 illustrates a schematic diagram of a HARQ feedback transmission method three according to some embodiments of the present disclosure.
Fig. 5 shows a schematic diagram of a terminal of some embodiments of the present disclosure.
Fig. 6 shows a schematic diagram of a base station of some embodiments of the present disclosure.
Fig. 7 illustrates a schematic diagram of a communication system of some embodiments of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure.
Unless otherwise specified, "first", "second", and the like in the present disclosure are described to distinguish different objects, and are not intended to mean size, timing, or the like. A "/" in this disclosure means "or" unless specifically stated otherwise.
The 5G NR supports flexible Time Division Duplex (TDD) frame structure configuration. The symbols of each slot may be configured into three types of downlink symbols, uplink symbols, and flexible symbols. The downlink symbol can only be used for downlink transmission, the uplink symbol can only be used for uplink transmission, and the flexible symbol is used for uplink transmission or downlink transmission at the end depending on whether the base station schedules downlink transmission or uplink transmission on the flexible symbol. The symbol type configuration mode adopts a mode of combining semi-static Radio Resource Control (RRC) configuration and dynamic Downlink Control Information (DCI) configuration. The RRC configuration supports cell-specific uplink and downlink configuration and terminal (UE) -specific uplink and downlink configuration, and configures uplink and downlink directions of symbols with minimum granularity of symbols. The UE-specific uplink and downlink configuration is configured by using symbols that are not configured for the cell-specific uplink and downlink configuration. The semi-static RRC configuration may be considered as a flexible symbol of the semi-static configuration without a configured symbol. The DCI configuration supports the use of Slot Format Indicator (SFI) carried by DCI Format 2 \u0 or determines the direction of a symbol by directly scheduling uplink and downlink data through DCI. The symbol type indicated by SFI is one of the three types mentioned previously. The flexible symbols of the semi-static configuration can be determined by the SFI or DCI to schedule uplink and downlink data to determine the symbol direction.
The embodiment of the disclosure provides how to determine the carrier for transmitting the PUCCH and the time domain position of the PUCCH on the carrier in a scene of multiple uplink carriers, so that the HARQ feedback transmission scheme which indicates the carrier for transmitting the PUCCH and determines the time domain position of the PUCCH on the carrier through DCI or MAC signaling is completely feasible. Therefore, the conflict between the HARQ feedback and the symbols which cannot be used for uplink in the TDD system is avoided to a certain extent, the resource waste caused by the retransmission of the PDSCH or a Physical Downlink Control Channel (PDCCH) due to the discarding of the HARQ feedback is avoided to a certain extent, and the time delay required by the successful transmission of the PDSCH or the PDCCH is reduced. For HARQ feedback of a dynamically scheduled PDSCH, for example, when the time domain position of the second carrier available for PUCCH transmission is earlier than the time domain position of the first carrier available for PUCCH transmission, the PUCCH is switched to the second carrier for transmission, so that the DCI may indicate a smaller time offset K1 from the PDSCH to the HARQ feedback, and thus the delay of the HARQ feedback may be reduced. For the HARQ feedback of the SPS PDSCH, for example, when the time domain position of the HARQ feedback determined by the PDSCH-to-HARQ feedback timing indicator carried in the DCI activating the SPS cannot be used for uplink transmission, the PUCCH is switched to the second carrier for transmission, so that resource waste caused by discarding the HARQ feedback can be avoided.
Fig. 1b illustrates a flow diagram of a method for harq feedback transmission according to some embodiments of the present disclosure.
As shown in fig. 1b, the method 100 for harq feedback transmission of this embodiment includes: steps 110 to 130 may be performed by the base station or the terminal, and are applicable to a HARQ feedback transmission scenario of multiple uplink carriers.
In step 110, a carrier indicated by DCI or Media Access Control (MAC) signaling for transmitting HARQ feedback, which is feedback on the PDSCH or PDCCH, is determined.
Since HARQ feedback is usually transmitted through PUCCH, a carrier used for transmitting HARQ feedback is also a carrier for transmitting PUCCH, which is referred to as PUCCH carrier for short.
In step 120, the number K1 of time units different from the time unit when the PDSCH or the PDCCH ends to a first time unit is determined, where the first time unit is a time unit for starting to transmit the HARQ feedback on a default carrier.
If the HARQ feedback is the feedback of the PDSCH, determining the number K1 of time units which are different from the time unit when the PDSCH finishes to the first time unit; and if the HARQ feedback is the feedback to the PDCCH, determining the number K1 of the time units which are different from the time unit when the PDCCH ends to the first time unit. For PDCCH indicating SPS release, HARQ feedback is feedback on PDCCH.
K1 represents a time unit offset from the time unit when the PDSCH or PDCCH ends to the first time unit, which is referred to as time unit offset or offset for short.
Optionally, K1 only counts HARQ feedback available time units. Symbols which cannot be used for uplink transmission are not included in the HARQ feedback available time unit. The symbols that cannot be used for uplink transmission include, for example, downlink symbols configured semi-statically by RRC signaling, symbols in which a Synchronization Broadcast Block (Synchronization Signal Physical Broadcast Channel Block, SS PBCH Block, or SSB) is located, and symbols in which PDCCH Control Resource Set 0 (Control Resource Set #0, core Set # 0) is located. The symbols that can be used for uplink transmission include, for example, semi-statically configured uplink symbols. The symbols that can be used for uplink transmission in turn include, for example, semi-statically configured uplink symbols and semi-statically configured flexible symbols.
The time units are for example time slots or sub-slots.
The subcarrier interval referred by the time unit with the phase difference is a subcarrier interval of a default carrier, where the default carrier is, for example, a Primary Cell (Pcell) carrier, or a Primary Secondary Cell Group Cell (Primary SCG Cell, PScell) carrier, or a PUCCH Secondary Cell (PUCCH Secondary Cell, PUCCH-Scell) carrier, or the indicated carrier for transmitting HARQ feedback.
In step 130, the HARQ feedback starts to be transmitted or received in the indicated time unit corresponding to the first time unit on the carrier.
The method 100, when executed by a terminal, performs the operation of transmitting the HARQ feedback in step 130; the method 100, when executed by a base station, performs the operation of receiving the HARQ feedback in step 130.
The method 100, when executed by a base station, specifically includes: steps 110a-130a.
In step 110a, the base station determines and indicates a carrier for transmitting HARQ feedback, which is feedback on the PDSCH or PDCCH, to the terminal through DCI or MAC signaling.
In step 120a, the base station determines and indicates to the terminal the number K1 of time units different between the time unit when the PDSCH or PDCCH ends and a first time unit, where the first time unit is a time unit when the HARQ feedback starts to be transmitted on a default carrier.
In step 130a, the base station starts to receive the HARQ feedback in the time unit corresponding to the first time unit on the indicated carrier.
The method 100, when executed by a terminal, comprises: steps 110b-130b.
In step 110b, the terminal receives DCI or MAC signaling sent by the base station, and determines a carrier indicated by the DCI or MAC signaling and used for transmitting HARQ feedback, where the HARQ feedback is feedback on the PDSCH or PDCCH.
In step 120b, the terminal receives the number K1 of time units, indicated by the base station, that are different from the time unit when the PDSCH or PDCCH ends to the first time unit, and determines the first time unit based on K1, where the first time unit is a time unit for starting to transmit the HARQ feedback on a default carrier.
In step 130b, the terminal starts to transmit the HARQ feedback in the time unit corresponding to the first time unit on the indicated carrier.
When the method 100 is executed by a terminal and a base station, the execution sequence of the steps is as follows: 110a, 110b, 120a, 120b, 130a.
The method 100 may determine one carrier from carriers included in one PUCCH carrier group for transmitting the PUCCH, or determine one carrier from carriers included in each of a plurality of PUCCH carrier groups for transmitting the PUCCH, so that the plurality of PUCCHs may be transmitted simultaneously.
The method 100 can be implemented, for example, by the methods of method one, method two, method three, method four, method five, etc., but is not limited to the listed methods.
The method comprises the following steps:
a field/field of carrier indication for transmitting HARQ feedback is newly added in DCI, that is, a field/field of PUCCH carrier indication, for example, PUCCH carrier indicator, is newly added in DCI. The PUCCH used for transmitting HARQ feedback is transmitted on the carrier indicated by the field/field indicated by the PUCCH carrier.
The subcarrier interval referred by the offset value K1 configured by the feedback timing indicator from the PDSCH or PDCCH to the HARQ in the DCI, the RRC signaling dl-DataToUL-ACK, or the RRC signaling dl-DataToUL-ACK-DCI-1-2 is the subcarrier interval of a Primary Cell (Pcell) carrier, or a Primary Secondary Cell (Primary Cell Group Cell, primary SCG Cell, PScell) carrier, or a PUCCH Secondary Cell (PUCCH Secondary Cell, PUCCH-Scell) carrier. That is, the time length of K1 time slots/sub-slots, which is the difference between the time slot/sub-slot n at which the PDSCH or PDCCH ends and the time slot/sub-slot n + K1 at which the HARQ feedback starts to be transmitted on the default carrier, is the time length of the time slot/sub-slot corresponding to the sub-carrier interval of the Pcell/PScell/PUCCH-Scell carrier.
And if the subcarrier interval of the PUCCH carrier indicated by the DCI is different from the subcarrier interval of the Pcell/PScell/PUCCH-Scell, the starting symbol of the slot/sub-slot for transmitting the PUCCH on the indicated PUCCH carrier is the first slot/sub-slot which is not earlier than the starting symbol of the slot/sub-slot for transmitting the PUCCH on the Pcell/PScell/PUCCH-Scell.
For example, in fig. 2a, 4 carriers with subcarrier spacing of 15KHz, 30KHz, 60KHz, 120KHz, respectively, are exemplarily shown. For the PDSCH which finishes transmission in the time slot with the number of 1 on the carrier wave of 30KHz, the indicated K1 is 4, and as the subcarrier interval of the Pcell/PScell/PUCCH-Scell is 30KHz, if the DCI indicates that the PUCCH (namely HARQ feedback) is transmitted on the carrier wave with the subcarrier interval of 30KHz, the time slot in which the PUCCH starts transmission is the time slot with the number of 5 on the carrier wave of 30 KHz; if the DCI indicates that the PUCCH is transmitted on the carrier with the subcarrier spacing of 60KHz, the time slot of starting transmission of the PUCCH is the time slot with the number of 10 on the carrier with the subcarrier spacing of 60 KHz; if the DCI indicates that the PUCCH is transmitted on the carrier with the subcarrier spacing of 120KHz, the time slot for starting transmission of the PUCCH is the time slot with the number of 20 on the carrier with the subcarrier spacing of 120 KHz; if the DCI indicates that the PUCCH is transmitted on a carrier with a subcarrier spacing of 15KHz, the slot where the PUCCH starts to be transmitted is the slot numbered 3 on the carrier with 15 KHz.
If the subcarrier spacing of the carrier where the PDSCH or PDCCH is located is larger than or equal to that of the Pcell/PScell/PUCCH-Scell, K1=0 corresponds to the time slot/subslot which overlaps with the PDSCH or PDCCH in time on the Pcell/PScell/PUCCH-Scell. If the subcarrier interval of the carrier where the PDSCH or PDCCH is located is smaller than that of the Pcell/PScell/PUCCH-Scell, K1=0 corresponds to the time slot/subslot where the PDSCH or PDCCH end time on the Pcell/PScell/PUCCH-Scell.
For example, in fig. 2b, for PDSCH whose transmission is ended in slot number 4 on carrier of 60KHz, indicated K1 is 6, since the subcarrier spacing of Pcell/PScell/PUCCH-Scell is 30KHz, if DCI indicates PUCCH (i.e., HARQ feedback) is transmitted on carrier whose subcarrier spacing is 30KHz, the slot where PUCCH starts to be transmitted is slot number 8 on carrier of 30 KHz; if the DCI indicates that the PUCCH is transmitted on the carrier with the subcarrier spacing of 60KHz, the time slot for starting transmission of the PUCCH is the time slot with the number of 16 on the carrier with the subcarrier spacing of 60 KHz; if the DCI indicates that the PUCCH is transmitted on the carrier with the subcarrier spacing of 120KHz, the time slot for starting transmission of the PUCCH is the time slot with the number of 32 on the carrier with the subcarrier spacing of 120 KHz; if the DCI indicates that the PUCCH is transmitted on a carrier with a subcarrier spacing of 15KHz, the slot where the PUCCH starts to be transmitted is the slot numbered 4 on the carrier with 15 KHz.
Optionally, K1 only counts the slots/sub-slots where the available PUCCH resources are located, that is, K1 only counts the slots/sub-slots available for HARQ feedback. The symbols constituting the available PUCCH resources do not include a downlink symbol configured by RRC signaling semi-statically, a symbol in which a Synchronization Broadcast Block (SS PBCH Block or SSB) is located, and a symbol in which a PDCCH Control Resource Set 0 (Control Resource Set #0, core Set # 0) is located. The symbols constituting the available PUCCH resources include, for example, semi-statically configured uplink symbols. The symbols constituting the available PUCCH resources in turn include, for example, semi-statically configured uplink symbols and semi-statically configured flexible symbols.
For example, in fig. 2b, if K1 indicated for PDSCH whose transmission is ended in slot number 4 on carrier of 60KHz is 4, if the symbols included in slots with Pcell/PScell/PUCCH- Scell numbers 3 and 4 are semi-statically configured downlink symbols, if DCI indicates that PUCCH is transmitted on a carrier with a subcarrier spacing of 30KHz, and K1 counts from the slot number 5 on the carrier of 30KHz, the slot where PUCCH starts to be transmitted is the slot number 8 on the carrier of 30 KHz.
The second method comprises the following steps:
a field/field of carrier indication for transmitting HARQ feedback is newly added in DCI, that is, a field/field of PUCCH carrier indication, for example, PUCCH carrier indicator, is newly added in DCI. The PUCCH used for transmitting HARQ feedback is transmitted on the carrier indicated by the field/field indicated by the PUCCH carrier.
The subcarrier interval referred by the offset value K1 indicated by the feedback timing indicator from the PDSCH or the PDCCH to the HARQ in the DCI, the offset value K1 configured by the RRC signaling dl-DataToUL-ACK and the RRC signaling dl-DataToUL-ACK-DCI-1-2 is the subcarrier interval of the PUCCH carrier indicated by the DCI. That is, the time length of K1 time slots/sub-slots, which is the difference between the time slot/sub-slot n at which the PDSCH or PDCCH ends and the time slot/sub-slot n + K1 at which the HARQ feedback starts to be transmitted on the carrier indicated by the DCI, is the time length of the time slot/sub-slot corresponding to the sub-carrier interval of the PUCCH carrier indicated by the DCI.
If the subcarrier spacing of the carrier where the PDSCH or PDCCH is located is greater than or equal to the subcarrier spacing of the PUCCH carrier indicated by the DCI, K1=0 corresponds to a time slot/subslot on the PUCCH carrier indicated by the DCI that overlaps in time with the PDSCH or PDCCH. If the subcarrier interval of the carrier where the PDSCH or the PDCCH is located is smaller than the subcarrier interval of the PUCCH carrier indicated by the DCI, K1=0 corresponds to a time slot corresponding to the PDSCH or PDCCH ending time on the PUCCH carrier indicated by the DCI.
For example, in fig. 3a, K1 is indicated as 4 for PDSCH ending transmission in slot number 1 on a carrier of 30 KHz. If the DCI indicates that the PUCCH is transmitted on a carrier with a subcarrier spacing of 30KHz, K1=0 corresponds to a slot numbered 1 on the carrier of 30KHz, the slot where the PUCCH starts to transmit is a slot numbered 5 on the carrier of 30 KHz; if the DCI indicates that the PUCCH is transmitted on a carrier with a subcarrier spacing of 60KHz, and K1=0 corresponds to a slot with the number of 3 on the carrier with the subcarrier spacing of 60KHz, the slot in which the PUCCH starts to transmit is a slot with the number of 7 on the carrier with the subcarrier spacing of 60 KHz; if the DCI indicates that the PUCCH is transmitted on a carrier with a subcarrier spacing of 120KHz, and K1=0 corresponds to a slot numbered 7 on the carrier of 120KHz, the slot where the PUCCH starts to be transmitted is a slot numbered 11 on the carrier of 120 KHz; if the DCI indicates that the PUCCH is transmitted on a carrier with a subcarrier spacing of 15KHz, K1=0 corresponds to a slot numbered 0 on the carrier of 15KHz, the slot where the PUCCH starts to be transmitted is a slot numbered 4 on the carrier of 15 KHz.
Optionally, K1 only counts the slots/sub-slots where the available PUCCH resources are located, that is, K1 only counts the slots/sub-slots available for HARQ feedback. The symbols forming the available PUCCH resources do not include downlink symbols configured semi-statically by RRRC signaling, the symbol where SSB is located, and the symbol where CORESET #0 is located. The symbols constituting the available PUCCH resources include, for example, semi-statically configured uplink symbols. The symbols constituting the available PUCCH resources in turn include, for example, semi-statically configured uplink symbols and semi-statically configured flexible symbols.
Optionally, RRC signaling dl-DataToUL-ACK or dl-DataToUL-ACK-DCI-1-2 may configure different sets of offset values for different carriers available for PUCCH transmission. And adopting the offset value set corresponding to the PUCCH carrier indicated by the DCI.
In one approach, the configured set of offset values contains the same number of offset values for different carriers that may be used for PUCCH transmission. This can ensure that the number of bits of the PDSCH-to-HARQ feedback timing indicator in the DCI does not vary with the PUCCH carrier indicated by the DCI.
In another approach, the configured set of offset values may contain different numbers of offset values for different carriers that may be used for PUCCH transmission. At this time, optionally, the total bit number protocol of the PUCCH resource indicator and the PDSCH-to-HARQ feedback timing indicator in the DCI is fixed or configured by RRC signaling. And the PDSCH-to-HARQ feedback timing indicator is used for indicating the value of the offset value in the offset value set. And determining the number of bits of the PUCCH resource indicator and the feedback timing indicator from the PDSCH to the HARQ according to the PUCCH carrier indicated by the DCI. For example, if I is the number of offset values in the offset value set configured by RRC signaling dl-DataToUL-ACK or dl-DataToUL-ACK-DCI-1-2 corresponding to the PUCCH carrier indicated by DCI, the bit number of the feedback timing indicator from PDSCH to HARQ in DCI is the same as that of the feedback timing indicator from PDSCH to HARQ
Figure BDA0003007911630000141
And the rest bits in the total bits are the number of bits of the PUCCH resource indicator. Such as shown in fig. 3 b.
The third method comprises the following steps:
and simultaneously indicating the carrier of the PUCCH and the number K1 of the time slots/sub-slots with the phase difference from the time slot/sub-slot n at the end of the PDSCH or the PDCCH to the time slot/sub-slot n + K1 at the beginning of the HARQ feedback by adopting the same domain/field/information element in the DCI. Namely, the PUCCH carrier and the time slot/sub-time slot number K1 with the difference from the time slot/sub-time slot n at the end of the PDSCH or PDCCH to the time slot/sub-time slot n + K1 at the beginning of the HARQ-ACK feedback are jointly coded. For PDSCH reception, n is the PDSCH ending time/sub-slot; for SPS PDSCH release, n is the slot/sub-slot where the PDCCH ends. And the subcarrier interval referred by the time slot/sub-slot number K1 from the time slot/sub-slot n when the PDSCH or PDCCH ends to the time slot/sub-slot n + K1 when the HARQ-ACK feedback starts is the subcarrier interval of the carrier where the PUCCH is positioned.
Optionally, the joint coding only considers the slot/sub-slot where the available PUCCH resource is located. The symbols constituting the available PUCCH resources do not include a semi-statically configured downlink symbol, a symbol in which SSB is located, and a symbol in which CORESET #0 is located. The symbols constituting the available PUCCH resources include, for example, semi-statically configured uplink symbols. The symbols constituting the available PUCCH resources in turn include, for example, semi-statically configured uplink symbols and semi-statically configured flexible symbols.
The joint coding mode may be: in all subcarrier intervals of the carriers which can be used for transmitting the HARQ feedback, the time length of one time slot/sub-time slot of the carrier with the minimum subcarrier interval is taken as a time unit, and the number K1 of the time slots/sub-slots which are different from the PUCCH carrier which can be adopted in the time unit and the time slot/sub-slot n at the end of the PDSCH or PDCCH to the time slot/sub-slot n + K1 at the beginning of the HARQ-ACK feedback are jointly coded. And after one time unit is compiled, compiling the next time unit.
In all subcarrier intervals of carriers which can be used for transmitting HARQ feedback, within a duration of a time unit with a minimum subcarrier interval as a reference, the carriers used for transmitting HARQ feedback and the K1 are indicated by a first value of the same field, or the same information element; in the duration of a time unit after the minimum subcarrier spacing is taken as a reference, the carrier used for transmitting the HARQ feedback and the K1 are indicated by the same domain, the same field or the second value of the same information element; the second value is greater than the first value.
Determining the number M1 of time units with a phase difference between a time unit for finishing PDSCH or PDCCH configured by RRC signaling and a second time unit, wherein the second time unit is a time unit for transmitting HARQ feedback on a carrier with the smallest subcarrier interval in all carriers capable of being used for transmitting the HARQ feedback, and the subcarrier interval referred by the phase difference time unit is the smallest subcarrier interval; the first time unit is included within a duration of the second time unit.
In one mode, the slots/subslots of the PUCCH indicated by all values of the field/information element are the slots/subslots where the PDSCH or PDCCH (for SPS PDSCH release) end time is located and the following consecutive slots/subslots. The bit number protocol of the fields/information elements is fixed or configured by RRC signaling.
In another mode, the time slot/sub-slot of the PUCCH indicated by all values of the field/information element is determined according to RRC signaling dl-DataToUL-ACK or dl-DataToUL-ACK-DCI-1-2. The reference subcarrier spacing of the offset of the RRC signaling configuration is a minimum subcarrier spacing. From the time slot/sub-slot where the PDSCH or PDCCH ends and the set of offsets K1 configured by RRC signaling dl-DataToUL-ACK or dl-DataToUL-ACK-DCI-1-2, the set of time slots/sub-slots available for PUCCH transmission on the carrier with the smallest subcarrier spacing can be determined. The field/information element indicates that the PUCCH's slots/subslots overlap in time with the slots/subslots in the set of slots/subslots available for PUCCH transmission on the carriers of the minimum subcarrier spacing, on other carriers than the carriers of the minimum subcarrier spacing. The bit number protocol of the field/information element is fixed, or configured by RRC signaling, or obtained according to the number of carriers, the subcarrier interval, and the number of slots/subslots of PUCCH.
Optionally, in a time unit, the joint coding may be performed in an order that, starting from the carrier with the largest subcarrier interval, the time slot/sub-slot where the PUCCH is located is increased first, then the number of the carrier is increased, and then the subcarrier interval is decreased. Fig. 4 shows an example of dl-DataToUL-ACK configured with offset values 1 and 3, the numbers 0-29 in the squares being the values of the fields/information elements.
Optionally, the joint coding in a time unit may also be performed from the carrier with the minimum subcarrier interval, according to the sequence that the time slot/sub-time slot where the PUCCH is located is increased first, then the carrier number is increased, and then the subcarrier interval is increased.
Optionally, the joint coding in one time unit may also be started from Pcell/PScell/PUCCH-Scell, and the Pcell/PScell/PUCCH-Scell is coded and then other carriers are coded according to the ascending order of carrier numbers. And the uplink transmission is carried out in the ascending order of the time slot/subslot of the PUCCH in one carrier.
The method four comprises the following steps:
the difference between the method four and the method one or the method two is that in the configuration of the RRC signaling PUCCH resource, the carrier where the PUCCH (i.e., HARQ feedback) is located is configured at the same time. For example, PUCCH carrier configuration is added in the following PUCCH resource configuration. Therefore, the resources of the PUCCH are determined according to the PUCCH resource indicator in the DCI, and the carrier where the PUCCH is located is also determined, namely, the PUCCH resources and the PUCCH carrier can be simultaneously determined according to the PUCCH resources indicated by the PUCCH resource indicator in the DCI.
The PUCCH resource configuration includes, for example, PUCCH resource identification, physical Resource Block (PRB), frequency hopping information, format information, and the like. The added PUCCH carrier configuration includes information such as PUCCH carrier identification, for example.
Figure BDA0003007911630000161
Figure BDA0003007911630000171
Except for the configuration method of the carrier where the PUCCH (i.e. HARQ feedback) is located, the other content method four is the same as the method one or the method two, and is not described herein again.
The method five comprises the following steps:
for the HARQ feedback of the SPS PDSCH, the base station indicates a PUCCH carrier for transmitting the HARQ feedback through MAC signaling, and the terminal determines the PUCCH carrier for transmitting the HARQ feedback according to the indication of the MAC signaling. The MAC signaling includes, for example, a MAC CE (Control Element). MAC signaling is carried, for example, in PDSCH.
When the HARQ feedback codebook includes only HARQ feedback for SPS PDSCH and all HARQ feedback are NACK, no HARQ feedback is transmitted, or PUCCH is not transmitted.
And when the HARQ feedback codebook only comprises HARQ feedbacks of SPS PDSCH, wherein some HARQ feedbacks are NACK, and some HARQ feedbacks are ACK, the PUCCH carrier indicated by the MAC CE is adopted.
And when the HARQ feedback codebook comprises HARQ feedback of the SPS PDSCH and HARQ feedback of the dynamically scheduled PDSCH, the PUCCH carrier dynamically indicated by the DCI is adopted.
Fig. 5 shows a schematic diagram of a terminal of some embodiments of the present disclosure.
As shown in fig. 5, the terminal 500 of this embodiment includes: a memory 510; and a processor 520 coupled to the memory 510, the processor 520 configured to perform a transmission method of hybrid automatic repeat request feedback based on instructions stored in the memory 510, wherein the transmitting or receiving of the HARQ feedback is performed.
For example, the terminal receives DCI or MAC signaling sent by the base station, and determines a carrier indicated by the DCI or MAC signaling and used for transmitting HARQ feedback, where the HARQ feedback is feedback on a PDSCH or a PDCCH; receiving the number K1 of time units which are indicated by a base station and have a difference from the time unit when the PDSCH or PDCCH ends to a first time unit, and determining the first time unit based on the K1, wherein the first time unit is a time unit for starting to transmit the HARQ feedback on a default carrier; and starting to send the HARQ feedback in a time unit corresponding to the first time unit on the indicated carrier.
Fig. 6 shows a schematic diagram of a base station of some embodiments of the present disclosure.
As shown in fig. 6, the base station 600 of this embodiment includes: a memory 610; and a processor 620 coupled to the memory 610, wherein the processor 620 is configured to perform a transmission method of hybrid automatic repeat request feedback based on instructions stored in the memory 610, wherein the operation of receiving HARQ feedback is performed in the step of transmitting or receiving HARQ feedback.
For example, the base station determines and indicates a carrier for transmitting HARQ feedback to the terminal through DCI or MAC signaling, where the HARQ feedback is feedback on a PDSCH or a PDCCH; determining and indicating the number K1 of time units with a difference between a time unit when the PDSCH or the PDCCH ends and a first time unit to a terminal, wherein the first time unit is a time unit for starting transmitting the HARQ feedback on a default carrier; starting to receive the HARQ feedback in a time unit corresponding to the first time unit on the indicated carrier.
The memory 510, 610 may include, for example, system memory, fixed non-volatile storage media, and the like. The system memory stores, for example, an operating system, an application program, a Boot Loader (Boot Loader), and other programs.
The terminal 500 or the base station 600 may further include an input/output interface, a network interface, a storage interface, and the like. These interfaces and the memory and processor may be connected by a bus, for example. The input and output interface provides a connection interface for input and output equipment such as a display, a mouse, a keyboard, a touch screen and the like. The network interface provides a connection interface for various networking devices. The storage interface provides a connection interface for external storage equipment such as an SD card and a U disk.
Fig. 7 illustrates a schematic diagram of a communication system of some embodiments of the present disclosure.
As shown in fig. 7, a communication system 700 of this embodiment includes: a terminal 500 and a base station 600. One base station 600 may serve multiple terminals 500.
Some embodiments of the present disclosure propose a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of a method for transmission of hybrid automatic repeat request feedback.
As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more non-transitory computer-readable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only exemplary of the present disclosure and is not intended to limit the present disclosure, so that any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.

Claims (18)

1. A method for HARQ feedback transmission, comprising:
determining a carrier indicated by DCI or MAC signaling for transmitting HARQ feedback, wherein the HARQ feedback is feedback on a PDSCH or a PDCCH;
determining the number K1 of time units which are different from the time unit when the PDSCH or the PDCCH ends to a first time unit, wherein the first time unit is the time unit for starting transmitting the HARQ feedback on a default carrier;
and starting to transmit or receive the HARQ feedback in a time unit corresponding to the first time unit on the indicated carrier.
2. The method of claim 1,
the subcarrier interval referred by the time unit with the phase difference is the subcarrier interval of a default carrier, and the default carrier is a Pcell carrier, or a PScell carrier, or a PUCCH-Scell carrier, or the indicated carrier for transmitting the HARQ feedback.
3. The method of claim 2, wherein starting to transmit or receive the HARQ feedback in the time unit corresponding to the first time unit on the indicated carrier comprises:
determining a first time unit with a starting time not earlier than the starting time of the first time unit on the default carrier on the indicated carrier as a time unit corresponding to the first time unit.
4. The method of claim 2,
if the subcarrier interval of the carrier where the PDSCH or PDCCH is located is larger than or equal to the subcarrier interval of the default carrier, the first time unit corresponding to K1 being equal to 0 is a time unit overlapping the PDSCH or PDSCH on the default carrier;
if the subcarrier interval of the carrier where the PDSCH or PDCCH is located is smaller than the subcarrier interval of the default carrier, the first time unit corresponding to the condition that K1 is equal to 0 is the time unit where the PDSCH or PDSCH of the default carrier ends.
5. The method according to claim 2, wherein in case the default carrier is the indicated carrier for transmitting HARQ feedback,
for different carriers used for transmitting HARQ feedback, the sets of K1 configured by RRC signaling are different, and the values of K1 in different sets are the same.
6. The method according to claim 2, wherein in case the default carrier is the indicated carrier for transmitting HARQ feedback,
for different carriers used for transmitting HARQ feedback, the sets of K1 configured by RRC signaling are different, and the value numbers of the K1 contained in the different sets are different;
the total bit number of PUCCH resource indicators and PDSCH-to-HARQ feedback timing indicators in the DCI is fixed by a protocol or configured by signaling, and the PDSCH-to-HARQ feedback timing indicators are used for indicating the value of K1 in the set of K1.
7. The method according to claim 2, wherein in case the default carrier is the indicated carrier for transmitting HARQ feedback,
the indicated carrier for transmitting HARQ feedback and the K1 are indicated by the same field, or the same information element in the DCI or MAC signaling.
8. The method of claim 7,
in all subcarrier intervals of carriers which can be used for transmitting HARQ feedback, within a duration of a time unit with a minimum subcarrier interval as a reference, the carriers used for transmitting HARQ feedback and the K1 are indicated by a first value of the same field, or the same information element; in the duration of a time unit after the minimum subcarrier spacing is taken as a reference, the carrier used for transmitting the HARQ feedback and the K1 are indicated by the same domain, the same field or the second value of the same information element; the second value is greater than the first value.
9. The method of claim 7,
determining the number M1 of time units with a phase difference between a time unit for finishing the PDSCH or the PDCCH configured by RRC signaling and a second time unit, wherein the second time unit is a time unit for transmitting HARQ feedback on a carrier with the minimum subcarrier interval in all carriers which can be used for transmitting the HARQ feedback, and the subcarrier interval referred by the time unit with the phase difference is the minimum subcarrier interval; the first time unit is included within a duration of the second time unit.
10. The method of claim 1, wherein determining a carrier indicated by the DCI for transmitting HARQ feedback comprises:
determining a PUCCH resource set configured by RRC signaling and a carrier corresponding to each PUCCH resource in the PUCCH resource set;
and determining PUCCH resources in the PUCCH resource set indicated by a PUCCH resource indicator in the DCI, and determining the carrier waves corresponding to the indicated PUCCH resources as the indicated carrier waves for transmitting HARQ feedback.
11. The method of claim 1, wherein determining the carrier indicated by the MAC signaling for transmitting the HARQ feedback comprises:
and when the HARQ feedback codebook only comprises the HARQ feedback of the SPS PDSCH, determining the carrier indicated by the MAC signaling and used for transmitting the HARQ feedback.
12. The method of any one of claims 1 to 11,
k1 only counts HARQ feedback available time units; symbols which cannot be used for uplink transmission are not included in the HARQ feedback available time unit.
13. The method according to any one of claims 1 to 11,
the method when executed by a base station comprises:
determining and indicating a carrier for transmitting HARQ feedback to a terminal through DCI or MAC signaling, wherein the HARQ feedback is feedback on a PDSCH or a PDCCH;
determining and indicating the number K1 of time units with a difference from a time unit when the PDSCH or PDCCH ends to a first time unit to a terminal, wherein the first time unit is a time unit for starting to transmit the HARQ feedback on a default carrier;
starting to receive the HARQ feedback in a time unit corresponding to the first time unit on the indicated carrier.
14. The method of any one of claims 1 to 11,
the method comprises the following steps when executed by a terminal:
receiving DCI or MAC signaling sent by a base station, and determining a carrier indicated by the DCI or MAC signaling and used for transmitting HARQ feedback, wherein the HARQ feedback is feedback on a PDSCH or a PDCCH;
receiving the number K1 of time units which are indicated by a base station and have a difference between the time unit of the PDSCH or PDCCH ending and a first time unit, and determining the first time unit based on the K1, wherein the first time unit is a time unit for starting to transmit the HARQ feedback on a default carrier;
starting to transmit the HARQ feedback in a time unit corresponding to the first time unit on the indicated carrier.
15. A terminal, comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the method of hybrid automatic repeat request feedback transmission of any of claims 1-12 and 14 based on instructions stored in the memory, wherein the transmitting or receiving the HARQ feedback is performed.
16. A base station, comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the method of hybrid automatic repeat request feedback transmission of any of claims 1-12 and 13 based on instructions stored in the memory, wherein the step of transmitting or receiving the HARQ feedback performs an operation of receiving HARQ feedback.
17. A communication system, comprising: the terminal of claim 15 and the base station of claim 16.
18. A non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the hybrid automatic repeat request feedback transmission method of any of claims 1-14.
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US20230043213A1 (en) * 2019-01-11 2023-02-09 Lg Electronics Inc. Method for transmitting a feedback information in a wireless communication system

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CN110677222B (en) * 2018-07-03 2022-04-05 大唐移动通信设备有限公司 HARQ feedback method and device for PDSCH repeated transmission
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