CN115150038A - 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
CN115150038A
CN115150038A CN202110339514.XA CN202110339514A CN115150038A CN 115150038 A CN115150038 A CN 115150038A CN 202110339514 A CN202110339514 A CN 202110339514A CN 115150038 A CN115150038 A CN 115150038A
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available pucch
harq feedback
pucch resource
pucch resources
candidate available
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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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    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0078—Timing of 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. The method provides a solution for reselecting the PUCCH resource for HARQ feedback when the PUCCH resource for HARQ feedback conflicts with a symbol which cannot be used for uplink at the configured time domain position of HARQ feedback, and determines the available PUCCH resource according to the candidate available PUCCH resource by determining the candidate available PUCCH resource, wherein the symbol where the candidate available PUCCH resource is located comprises the uplink symbol configured in a semi-static manner. Therefore, the resource waste caused by PDSCH retransmission due to the fact that HARQ feedback is discarded is avoided, and the time delay required by the successful transmission of the PDSCH is reduced.

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 the HARQ-ACK feedback is determined according to the offset indicated by the PDSCH-to-HARQ feedback timing indicator carried in the SPS-enabled DCI or the offset configured by the RRC signaling, the HARQ feedback of the 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.
Disclosure of Invention
In the time domain position of the configured HARQ feedback, when the PUCCH resource used for HARQ feedback conflicts with the symbol which cannot be used for uplink, the embodiment of the disclosure provides a solution for reselecting the PUCCH resource used for HARQ feedback. Therefore, the resource waste caused by PDSCH retransmission due to the fact that HARQ feedback is discarded is avoided, and the time delay required by the successful transmission of the PDSCH is reduced.
Some embodiments of the present disclosure provide a method for hybrid automatic repeat request feedback transmission, including:
in the configured time domain position of the HARQ feedback, when the PUCCH resource used for the HARQ feedback conflicts with the symbol which cannot be used for uplink, determining a candidate available PUCCH resource, wherein the symbol where the candidate available PUCCH resource is located comprises the uplink symbol configured in a semi-static manner;
determining available PUCCH resources for transmitting or receiving the HARQ feedback on the available PUCCH resources according to the candidate available PUCCH resources.
In some embodiments, determining the candidate available PUCCH resources comprises:
determining candidate available PUCCH resources from the time slot of the configured time domain position of the HARQ feedback or the first time slot after the time slot, and if no candidate available PUCCH resource exists in one time slot, continuously determining the candidate available PUCCH resources in the next time slot;
or, determining candidate available PUCCH resources from a sub-slot where the configured time domain position of the HARQ feedback is located or a first sub-slot after the configured time domain position of the HARQ feedback is located, and if there is no candidate available PUCCH resource in one sub-slot, continuing to determine candidate available PUCCH resources in a next sub-slot.
In some embodiments, when the preset condition is met, the symbols in which the candidate available PUCCH resources are located further include semi-statically configured flexible symbols,
wherein the preset conditions include: in a downlink and uplink transmission period, the ratio information between the number of the semi-statically configured uplink symbols and the number of the semi-statically configured flexible symbols is smaller than a first preset value, or the number of the semi-statically configured flexible symbols is larger than a second preset value.
In some embodiments, determining the available PUCCH resources from the candidate available PUCCH resources comprises:
judging whether the code rate of the uplink control information transmitted on the candidate available PUCCH resources is greater than the configured maximum code rate; if not, the candidate available PUCCH resources are used as available PUCCH resources; if so, the candidate available PUCCH resource is not used as the available PUCCH resource, and whether the code rate of uplink control information transmission on the next candidate available PUCCH resource is greater than the configured maximum code rate is continuously judged;
and/or the presence of a gas in the atmosphere,
judging whether the bit number of uplink control information transmitted in the candidate available PUCCH resources is larger than a preset value or not; if not, the candidate available PUCCH resources are used as available PUCCH resources; if so, the candidate available PUCCH resource is not used as the available PUCCH resource, and whether the bit number of the uplink control information transmitted in the next candidate available PUCCH resource is larger than a preset value or not is continuously judged.
In some embodiments, if the PUCCH format corresponding to the candidate available PUCCH resource is the first PUCCH format, determining whether a code rate of uplink control information transmitted on the candidate available PUCCH resource is greater than a configured maximum code rate;
and if the PUCCH format corresponding to the candidate available PUCCH resource is the second PUCCH format, judging whether the bit number of the uplink control information transmitted in the candidate available PUCCH resource is larger than a preset value.
In some embodiments, the uplink control information used to make the determination does not include HARQ feedback for a dynamically scheduled PDSCH; or, the uplink control information for the determination is only HARQ feedback of the semi-persistent scheduled PDSCH.
In some embodiments, determining the available PUCCH resources from the candidate available PUCCH resources comprises:
and within the determined time length, if the number of the HARQ feedbacks is multiple and the number of the time slots or the sub-time slots in which the candidate available PUCCH resources are located is multiple, distributing all HARQ feedbacks, which need to be sent or received within the determined time length and contain the plurality of HARQ feedbacks, of the semi-persistent scheduling PDSCH to the multiple time slots or the sub-time slots approximately evenly, and using the candidate available PUCCH resources of the time slots or the sub-time slots to which the HARQ feedbacks are distributed as the available PUCCH resources.
In some embodiments, determining the candidate available PUCCH resources comprises: candidate available PUCCH resources are determined in one or more of a first PUCCH resource set used for HARQ feedback of a PDSCH of semi-persistent scheduling, a second PUCCH resource set used for HARQ feedback of a PDSCH of dynamic scheduling, and a third PUCCH resource set used for multi-Channel State Information (CSI) transmission.
In some embodiments, determining the candidate available PUCCH resources in the first set of PUCCH resources for HARQ feedback for the semi-persistently scheduled PDSCH comprises:
determining one resource in the first PUCCH resource set as a candidate available PUCCH resource according to the number of bits of uplink control information needing to be sent or received in one time slot or sub-time slot;
or, one resource in the first PUCCH resource set configured by the downlink control information for activating the semi-persistent PDSCH scheduling is a candidate available PUCCH resource.
In some embodiments, determining the candidate available PUCCH resources in the first set of PUCCH resources for HARQ feedback of the semi-persistently scheduled PDSCH and the second set of PUCCH resources for HARQ feedback of the dynamically scheduled PDSCH comprises:
when uplink control information needing to be transmitted in one time slot or sub-time slot does not comprise HARQ feedback of a dynamically scheduled PDSCH, determining candidate available PUCCH resources from a first PUCCH resource set of the HARQ feedback of the PDSCH for semi-persistent scheduling, and if the candidate available PUCCH resources are not found in the first PUCCH resource set of the HARQ feedback of the PDSCH for semi-persistent scheduling, determining the candidate available PUCCH resources from a second PUCCH resource set of the HARQ feedback of the PDSCH for dynamic scheduling;
when the uplink control information required to be transmitted in one slot or sub-slot includes HARQ feedback of the dynamically scheduled PDSCH, determining candidate available PUCCH resources from a second PUCCH resource set for the HARQ feedback of the dynamically scheduled PDSCH.
In some embodiments, the resources in the third PUCCH resource set for multi-channel state information, CSI, transmission may be candidate available PUCCH resources, and when uplink control information required to be transmitted in one slot or sub-slot includes multiple CSIs, the candidate available PUCCH resources are determined from the third PUCCH resource set for multi-channel state information, CSI, transmission.
In some embodiments, determining the candidate available PUCCH resources comprises: and determining candidate available PUCCH resources at a time domain position corresponding to the configured time domain position of the HARQ feedback on a second carrier different from the first carrier on which the HARQ feedback is positioned.
In some embodiments, for HARQ feedback of a dynamically scheduled PDSCH, the symbols in which the candidate available PUCCH resources are located include semi-statically configured uplink symbols, semi-statically configured flexible symbols.
In some embodiments, for HARQ feedback of a semi-persistent scheduled PDSCH, a symbol in which a candidate available PUCCH resource is located preferably includes only a semi-statically configured uplink symbol; if the second carrier with the candidate available PUCCH resources is not found, the symbols with the candidate available PUCCH resources also comprise semi-statically configured flexible symbols.
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 transmission method of hybrid automatic repeat request feedback and to send HARQ feedback on available PUCCH resources based on instructions stored in the memory.
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 transmission method of hybrid automatic repeat request feedback and receive HARQ feedback on available PUCCH resources based on instructions stored in the memory.
Some embodiments of the present disclosure provide a communication system, including: a terminal and a base station.
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 transmission method of hybrid automatic repeat request feedback.
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 will be more clearly understood from the following detailed description, which proceeds with reference to the accompanying drawings.
It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without undue inventive faculty.
Fig. 1 shows a flow diagram of a HARQ feedback transmission method according to some embodiments of the present disclosure.
Fig. 2 illustrates a diagram of HARQ feedback transmission on available PUCCH resources according to some embodiments of the present disclosure.
Fig. 3 illustrates a diagram of HARQ feedback based on equalization processing transmitted on available PUCCH resources according to some embodiments of the present disclosure.
Fig. 4 illustrates a schematic diagram of an available PUCCH resource transmission for HARQ feedback switching to another carrier in 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 specifically stated otherwise, the descriptions of "first", "second", etc. in this disclosure are used to distinguish different objects, and are not used to indicate the meaning of size or timing, etc.
The 5G NR supports a 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 symbols can only be used for downlink transmission, the uplink symbols can only be used for uplink transmission, and the flexible symbols are 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 symbols. 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. Semi-static RRC configuration may be considered as a semi-static configured flexible symbol without configured symbols. The DCI configuration supports a Slot Format Indicator (SFI) carried by DCI Format 2 \u0 or determines a symbol direction 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 a solution for how to reselect the PUCCH resource for HARQ feedback when the PUCCH resource for HARQ feedback collides with a symbol which cannot be used for uplink at the configured time domain position of HARQ feedback.
Fig. 1 shows a flow diagram of a HARQ feedback transmission method according to some embodiments of the present disclosure.
As shown in fig. 1, the HARQ feedback transmission method 10 of this embodiment includes: steps 110-120.
In step 110, at the configured time domain position of the HARQ feedback, when a PUCCH resource for the HARQ feedback collides with a symbol that cannot be used for uplink, a candidate available PUCCH resource is determined. The symbol where the candidate available PUCCH resource is located includes a semi-statically configured uplink symbol.
The configured time domain position of the HARQ feedback in step 110 may be a time domain position determined according to an offset K1 configured from a PDSCH carried in DCI to a feedback timing indicator of the HARQ, or a time domain position determined according to an offset K1 configured by an RRC signaling. The way of determining the time domain position according to the configured offset K1 is that if the PDSCH transmission ends at a time slot or sub-time slot n, the corresponding HARQ feedback starts to be transmitted at time slot or sub-time slot n + K1. The collision of the PUCCH resource for HARQ feedback with the symbol that cannot be used for uplink means that the symbol in which the PUCCH resource for HARQ feedback is located includes a symbol that cannot be used for uplink. The candidate available PUCCH resources do not collide with symbols that cannot be used for uplink, i.e., the symbols in which the candidate available PUCCH resources are located do not include symbols that cannot be used for uplink.
In step 120, an available PUCCH resource is determined from the candidate available PUCCH resources for transmitting or receiving the HARQ feedback on the available PUCCH resource.
Steps 110-120 may be performed by a base station or a terminal. When steps 110-120 are performed by the terminal, the terminal may send HARQ feedback on the available PUCCH resources. When steps 110-120 are performed by a base station, the base station may receive HARQ feedback on available PUCCH resources.
In the time domain position of the configured HARQ feedback, when the PUCCH resource used for HARQ feedback conflicts with the symbol which cannot be used for uplink, the available PUCCH resource is determined according to the candidate available PUCCH resource by determining the candidate available PUCCH resource, wherein the symbol where the candidate available PUCCH resource is located comprises the uplink symbol which is configured in a semi-static manner. Therefore, resource waste caused by PDSCH retransmission due to the fact that HARQ feedback is discarded is avoided, and time delay required by PDSCH successful transmission is reduced.
The first aspect of the present disclosure provides a method for how to reselect a PUCCH resource to transmit HARQ feedback when a PUCCH resource for HARQ feedback and a symbol that cannot be used for uplink collide, for HARQ feedback of SPS PDSCH, at a time domain position of HARQ feedback determined according to an offset configured by a PDSCH-to-HARQ feedback timing indicator carried in DCI activating SPS, or at a time domain position of HARQ feedback determined according to an offset configured by RRC signaling. The symbols which cannot be used for uplink include Downlink symbols configured by RRC signaling semi-statically, symbols where a Synchronization Broadcast Block (Synchronization Signal/Physical Broadcast Channel Block, synchronization Signal/Physical Broadcast Channel Block SS/PBCH Block, SSB for short) is located, and symbols where a Physical Downlink Control Channel (PDCCH) Control Resource Set 0 (Control Resource Set #0, core Set # 0) is located.
In some embodiments, the determining candidate available PUCCH resources of step 110 includes: determining candidate available PUCCH resources from a time slot where the configured time domain position of the HARQ feedback is located or a first time slot after the time slot, and if no candidate available PUCCH resource exists in one time slot, continuing to determine the candidate available PUCCH resources in the next time slot; or, determining candidate available PUCCH resources from a sub-slot where the configured time domain position of the HARQ feedback is located or a first sub-slot after the configured time domain position of the HARQ feedback is located, and if there is no candidate available PUCCH resource in one sub-slot, continuing to determine candidate available PUCCH resources in a next sub-slot.
Reselection of PUCCH resources requires determination of the symbol type of the symbol in which the candidate available PUCCH resource is located. The symbol where the candidate available PUCCH resource is located includes a semi-statically configured uplink symbol. And when the preset condition is met, the symbol where the candidate available PUCCH resource is located further comprises a semi-statically configured flexible symbol.
One example of the preset condition includes: in a downlink and uplink transmission period, the ratio information between the number of the semi-statically configured uplink symbols and the number of the semi-statically configured flexible symbols is smaller than a first preset value. When the preset condition is met, the semi-statically configured flexible symbol can be used as a symbol where the candidate available PUCCH resource is located.
For example, in one downlink uplink transmission period, when fun (the number of semi-statically configured uplink symbols/the number of semi-statically configured flexible symbols) is greater than X, the semi-statically configured flexible symbols are not used as symbols where the candidate available PUCCH resources are located; and fun (the number of the semi-statically configured uplink symbols/the number of the semi-statically configured flexible symbols) is less than X, using the semi-statically configured flexible symbols as symbols where the candidate available PUCCH resources are located. Wherein X is the first preset value. Optionally, X is a predefined value. fun () is a predefined function. For example, fun () is a ceiling operation, or fun (a) = a.
Another example of the preset condition includes: and in a downlink and uplink transmission period, the number of the flexible symbols in the semi-static configuration is greater than a second preset value. When the preset condition is met, the semi-statically configured flexible symbol can be used as a symbol where the candidate available PUCCH resource is located.
For example, in a downlink uplink transmission period, when the number of the semi-statically configured flexible symbols is less than Y, the semi-statically configured flexible symbols are not used as symbols where the candidate available PUCCH resources are located; and when the number of the flexible symbols in the semi-static configuration is larger than Y, using the flexible symbols in the semi-static configuration as the symbols where the candidate available PUCCH resources are located. Wherein Y is the second preset value. Optionally, Y is a predetermined value.
The downlink and uplink transmission period refers to a period of a symbol type configured by RRC signaling. The RRC signaling may be dl-UL-transmissionPeriodicity. One downlink and uplink transmission period comprises S time slots, wherein the front d slots Each time slot only contains downlink symbols, last u slots Each slot contains only uplink symbols. Front d slots D after a time slot sym Each symbol is a downlink symbol. Last u slots U before a slot sym Each symbol is an uplink symbol. The rest of the
Figure BDA0002998792270000091
Is a flexible symbol of semi-static configuration. Wherein d is slots 、u slots 、d sym 、u sym Is a value configured by the RRC signaling,
Figure BDA0002998792270000092
is the number of symbols contained in a slot.
The following describes an advantage that a semi-statically configured flexible symbol may be used as a symbol where a candidate available PUCCH resource is located when the aforementioned preset condition is met.
(1) The flexible symbols with semi-static configuration can be further determined by the SFI carried by the DCI or the uplink and downlink data scheduled by the DCI. If the semi-statically configured flexible symbol is used as the symbol where the candidate available PUCCH resource is located only when the semi-statically configured flexible symbol is not dynamically scheduled by DCI for downlink transmission and/or the semi-statically configured flexible symbol is indicated by SFI as an uplink symbol, if the UE loses the scheduling DCI or the DCI carrying the SFI, the base station and the UE may not understand consistently whether the semi-statically configured flexible symbol can be used as the symbol where the candidate available PUCCH resource is located, so that the PUCCH resource for transmitting HARQ feedback is not understood consistently.
(2) If the semi-statically configured flexible symbol can always be used as the symbol where the candidate available PUCCH resource is located, when the PUCCH resource of the HARQ feedback of the SPS PDSCH includes the semi-statically configured flexible symbol, DCI schedules downlink transmission at the flexible symbol, or SFI indicates that the flexible symbol is not an uplink symbol, the HARQ feedback may still be discarded.
(3) If the symbol where the candidate available PUCCH resource is located only includes the semi-statically configured uplink symbol and does not always include the semi-statically configured flexible symbol, the HARQ feedback delay is larger when the number of semi-statically configured uplink symbols of the system is relatively small. When the system does not have the semi-statically configured uplink symbols, the HARQ feedback cannot even be transmitted.
(4) The base station can determine whether the semi-statically configured flexible symbol can be used as the symbol where the candidate available PUCCH resource is located according to the configuration conditions of the semi-statically configured uplink symbol and the semi-statically configured flexible symbol in the system. For example, when there are more uplink symbols of the semi-static configuration and fewer flexible symbols of the semi-static configuration, the flexible symbols of the semi-static configuration are not used as symbols where the candidate available PUCCH resources are located, thereby avoiding the HARQ feedback from being discarded. When the number of semi-statically configured uplink symbols is small and the number of semi-statically configured flexible symbols is large, the semi-statically configured flexible symbols are used as symbols where the candidate available PUCCH resources are located, and therefore large HARQ feedback time delay is avoided. In addition, the method and the device adopt a preset mode, and therefore signaling overhead is saved.
Before the time slot or the sub-time slot where the PUCCH resource is available, if the PUCCH resource fed back by the HARQ of a plurality of SPS PDSCH conflicts with the symbol which can not be used for uplink, transmitting multiple HARQ feedbacks in the slot or sub-slot where the first available PUCCH resource is located may cause the PUCCH loads of different slots or sub-slots to be unbalanced. As shown in fig. 2, DL represents DownLink (DownLink), UL represents UpLink (UpLink), slot represents time slot, and a/N represents HARQ feedback is ACK or NACK, if the HARQ feedback colliding at time slot N +1, N +2, N +3 is transmitted at time slot N +4, there may be too many HARQ feedback bits that need to be transmitted at time slot N +4, which reduces the reliability of HARQ feedback transmission.
In order to balance the HARQ feedback load of the slot or the sub-slot where each available PUCCH resource is located, the present disclosure proposes, for step 120, three methods for determining an available PUCCH resource according to a candidate available PUCCH resource, that is, for the mode one, the mode two, and the mode three for determining an available PUCCH resource in step 120, which all implement PUCCH load balancing. However, if the HARQ feedback load balancing problem is not considered, the candidate available PUCCH resource may be directly used as an available PUCCH resource.
A first way of determining available PUCCH resources for step 120 is described below. That is, the base station or the terminal determines whether the code rate of the uplink control information transmitted on the candidate available PUCCH resource is greater than the configured maximum code rate; if not, the candidate available PUCCH resources are used as available PUCCH resources; if so, the candidate available PUCCH resource is not used as the available PUCCH resource, and whether the code rate for transmitting the uplink control information in the next candidate available PUCCH resource is greater than the configured maximum code rate or not is continuously judged.
And the base station configures the maximum code rate for transmitting the uplink control information on the available PUCCH resources through RRC signaling. For example, the maximum code rate is maxCodeRate configured in PUCCH-FormatConfig. Optionally, the maximum code rate adopts the same signaling configuration for different PUCCH formats. Optionally, the maximum code rate adopts the same signaling configuration for all PUCCH resources in the same PUCCH resource set. Optionally, the maximum code rate adopts the same signaling configuration for PUCCH resources in all PUCCH resource sets.
When determining the available PUCCH resources to send or receive the HARQ feedback of the SPS PDSCH according to the candidate available PUCCH resources, considering the newly added bits of the HARQ feedback needing to reselect the PUCCH resources, the code rate of transmitting the uplink control information on the available PUCCH resources cannot be larger than the maximum code rate. If the candidate available PUCCH resources are greater than the maximum code rate, the candidate available PUCCH resources are not available PUCCH resources.
The code rate of the PUCCH can better reflect the transmission performance of the PUCCH in a certain channel state, so that the reliability of PUCCH transmission is ensured. In addition, the maximum code rate used in a certain channel state may not change with the size of the PUCCH resource, thereby simplifying configuration complexity.
A second manner of determining the available PUCCH resources for step 120 is described below. That is to say that the first and second electrodes, the base station or the terminal judges whether the bit number of the uplink control information transmitted in the candidate available PUCCH resources is larger than a preset value or not; if not, the candidate available PUCCH resources are used as available PUCCH resources; if so, the candidate available PUCCH resource is not used as the available PUCCH resource, and whether the bit number of the uplink control information transmitted in the next candidate available PUCCH resource is larger than a preset value or not is continuously judged. The preset value may be a value configured through RRC signaling or a predetermined value. Said preset value is for example equal to 2.
Optionally, for different PUCCH formats, the base station or the terminal respectively adopts a first mode and a second mode for determining available PUCCH resources. For example, if the PUCCH format corresponding to the candidate available PUCCH resource is the first PUCCH format, it is determined whether the code rate of the uplink control information transmitted in the candidate available PUCCH resource is greater than the configured maximum code rate. The first PUCCH format includes, for example, PUCCH formats 2, 3, and 4. And if the PUCCH format corresponding to the candidate available PUCCH resource is the second PUCCH format, judging whether the bit number of the uplink control information transmitted in the candidate available PUCCH resource is larger than a preset value. The second PUCCH format includes PUCCH formats 0,1, for example.
And when the base station or the terminal judges the mode I and/or the mode II, the uplink control information comprises newly added bits of HARQ feedback needing to select PUCCH resources again. Optionally, the uplink control information for performing the determination does not include HARQ feedback of the dynamically scheduled PDSCH. Or, optionally, the uplink control information for performing the determination is only HARQ feedback of the PDSCH in the semi-persistent scheduling. Therefore, even if the UE loses the DCI of the dynamically scheduled PDSCH, the judgment of whether the candidate available PUCCH resources are available PUCCH resources by the base station and the UE can still be kept consistent, and the understanding of the PUCCH resources for sending HARQ feedback is consistent.
If there are multiple HARQ feedbacks required to reselect the PUCCH resources, the available PUCCH resources can be sequentially determined according to the time sequence of PDSCH transmission corresponding to the HARQ feedbacks. The time sequence of PDSCH transmission corresponding to HARQ feedback may be, for example, the time sequence of PDSCH end time. For a certain PDSCH, available PUCCH resources are searched from a time slot or a sub-time slot m, wherein the time slot or the sub-time slot m is a time slot or a sub-time slot of HARQ feedback determined according to an offset indicated by a feedback timing indicator from a PDSCH loaded in DCI activating the SPS PDSCH to HARQ, or the time slot or the sub-time slot of the HARQ feedback determined according to the offset configured by RRC signaling. If the slot or the sub-slot m has no available PUCCH resource, the available PUCCH resource is searched for in the slot or the sub-slot m + 1. If the slot or sub-slot m +1 has no available PUCCH resource, then find available PUCCH resource in slot or sub-slot m +2 \8230 \ 8230;. And sending or receiving HARQ feedback in the time slot or the sub-time slot of the available PUCCH resource until the available PUCCH resource of the PDSCH is found. The available PUCCH resources for the next PDSCH are searched for.
For example, as shown in fig. 3, for PDSCH in slot n, the available PUCCH resources are searched from slot n +1 until slot n +3 finds available PUCCH resources, and HARQ feedback is transmitted or received in slot n + 3. For PDSCH in slot n +1, find available PUCCH resources starting from slot n +2 until slot n +3 finds available PUCCH resources, and send or receive HARQ feedback in slot n + 3. For the PDSCH in slot n +2, the available PUCCH resources are searched from slot n +3, but the HARQ feedback of the PDSCH in slot n, n +1 needs to be sent or received for the candidate available PUCCH resource in slot n +3, and the HARQ feedback of the PDSCH in slot n +2 exceeds the maximum code rate limit for transmitting uplink control information in the available PUCCH resource. So for PDSCH at slot n +2, the candidate available PUCCH resource for slot n +3 is an unavailable PUCCH resource, so that the available PUCCH resource for slot n +4 is found, and HARQ feedback is sent at slot n + 4.
The determining of the candidate available PUCCH resources in step 110 includes: candidate available PUCCH resources are determined among one or more of a first PUCCH resource set for HARQ feedback of a semi-persistently scheduled PDSCH, a second PUCCH resource set for HARQ feedback of a dynamically scheduled PDSCH, and a third PUCCH resource set for multi-Channel State Information (CSI) transmission.
Each PUCCH resource set may include one or more PUCCH resources. The PUCCH resources for HARQ feedback of the semi-persistently scheduled PDSCH include resources in a resource set configured by RRC signaling SPS-PUCCH-AN-List-r16 or n1PUCCH-AN configured resources. The PUCCH resources for HARQ feedback of the dynamically scheduled PDSCH include resources in a set of resources configured by RRC signaling PUCCH-resources set. The PUCCH resources for multi-CSI transmission comprise resources in a set of resources configured by RRC signaling multi-CSI-PUCCH-ResourceList.
In the first case, the candidate available PUCCH resources are only resources in the first PUCCH resource set used for HARQ feedback for the semi-persistently scheduled PDSCH.
For step 110, determining candidate available PUCCH resources in a first PUCCH resource set for HARQ feedback for a semi-persistently scheduled PDSCH comprises: determining one resource in the first PUCCH resource set as a candidate available PUCCH resource according to the bit number of uplink control information needing to be sent or received in one time slot or sub-time slot; or, one resource in the first PUCCH resource set configured by the downlink control information for activating the semi-persistent PDSCH scheduling is a candidate available PUCCH resource.
When a plurality of resources are available in the first PUCCH resource set, one resource in the first PUCCH resource set is determined as a candidate available PUCCH resource according to the number of bits of uplink control information which needs to be sent or received in one time slot or sub-time slot. For example, if there are 4 PUCCH resources in the first PUCCH resource set, if the number of bits of the uplink control information is less than or equal to N1, determining that the first PUCCH resource is a candidate available PUCCH resource; if N1< the number of the bits of the uplink control information is less than or equal to N2, determining a second PUCCH resource as a candidate available PUCCH resource; if N2< the number of the bits of the uplink control information is less than or equal to N3, determining a third PUCCH resource as a candidate available PUCCH resource; and if the bit number of the uplink control information is greater than N3, determining that the fourth PUCCH resource is a candidate available PUCCH resource. The uplink control information does not include HARQ feedback for the dynamically scheduled PDSCH. Or, the uplink control information is only HARQ feedback of the semi-persistent scheduled PDSCH.
Or, when there are a plurality of resources in the first PUCCH resource set, indicating one resource in the first PUCCH resource set as a candidate available PUCCH resource by the DCI activating the SPS PDSCH.
In the second case, the candidate available PUCCH resources may be resources in a first PUCCH resource set for HARQ feedback of a semi-persistently scheduled PDSCH, a second PUCCH resource set for HARQ feedback of a dynamically scheduled PDSCH.
In connection with the step 110, it is, determining candidate available PUCCH resources in a first PUCCH resource set for HARQ feedback of a semi-persistently scheduled PDSCH and a second PUCCH resource set for HARQ feedback of a dynamically scheduled PDSCH includes:
when the uplink control information needing to be transmitted in one time slot or sub-time slot does not comprise HARQ feedback of the PDSCH in dynamic scheduling, determining candidate available PUCCH resources from a first PUCCH resource set used for HARQ feedback of the PDSCH in semi-persistent scheduling. Optionally, if no candidate available PUCCH resource is found in the first PUCCH resource set of HARQ feedback of the semi-persistent scheduled PDSCH, then the candidate available PUCCH resource is determined from the second PUCCH resource set of HARQ feedback of the PDSCH for dynamic scheduling.
When the uplink control information required to be transmitted in one slot or sub-slot includes HARQ feedback of the dynamically scheduled PDSCH, determining candidate available PUCCH resources from a second PUCCH resource set for the HARQ feedback of the dynamically scheduled PDSCH.
Preferentially determining candidate available PUCCH resources from a first PUCCH resource set used for HARQ feedback of a PDSCH in semi-persistent scheduling when uplink control information required to be transmitted in one slot or sub-slot does not include HARQ feedback of the PDSCH in dynamic scheduling. When there are multiple resources in the first PUCCH resource set for HARQ feedback of the semi-persistently scheduled PDSCH, the determination may be as described in the first case. Optionally, if no candidate available PUCCH resource is found in the first PUCCH resource set of HARQ feedback of the semi-persistent scheduled PDSCH, then the candidate available PUCCH resource is found from the second PUCCH resource set of HARQ feedback of the PDSCH for dynamic scheduling. The second PUCCH resource set for HARQ feedback of the dynamically scheduled PDSCH may be configured in plurality. And when a plurality of second PUCCH resource sets are configured, determining one PUCCH resource set according to the number of bits of uplink control information needing to be sent or received in one time slot or sub-time slot. For example, if 4 second PUCCH resource sets for HARQ feedback of the PDSCH for dynamic scheduling are configured, if the number of bits of the uplink control information is less than or equal to M1, a first second PUCCH resource set is used; if M1< the number of bits of the uplink control information is less than or equal to M2, adopting a second PUCCH resource set; if the M2< the number of the bits of the uplink control information is less than or equal to M3, adopting a third second PUCCH resource set; and if the bit number of the uplink control information is larger than M3, adopting a fourth second PUCCH resource set. Optionally, in the second PUCCH resource set used, candidate available PUCCH resources are searched in a predetermined order. The predetermined order may be in an order of PUCCH resource indices from small to large. Or, optionally, in the second set of PUCCH resources employed, candidate available PUCCH resources are indicated by DCI activating SPS PDSCH.
When the uplink control information to be transmitted in one slot or sub-slot includes HARQ feedback of the dynamically scheduled PDSCH, determining candidate available PUCCH resources from a second PUCCH resource set for HARQ feedback of the dynamically scheduled PDSCH. The second PUCCH resource set for HARQ feedback of the dynamically scheduled PDSCH may be configured in plurality. The method for determining a second PUCCH resource set according to the number of bits of uplink control information to be transmitted or received in a slot or sub-slot is the same as described above. In the second set of PUCCH resources employed, candidate available PUCCH resources are indicated by the DCI scheduling the dynamically scheduled PDSCH.
In a third case, when a third set of PUCCH resources for multi-channel state information, CSI, transmission is configured, the candidate available PUCCH resources may be resources in the third set of PUCCH resources.
For step 110, when uplink control information to be transmitted in one slot or sub-slot includes multiple CSI, preferentially determining candidate available PUCCH resources from the third PUCCH resource set for multiple CSI transmission. Optionally, if the third PUCCH resource set does not have the candidate available PUCCH resource, the candidate available PUCCH resource is determined in the same manner as in the first or second case. Optionally, when the uplink control information to be transmitted in one slot or sub-slot does not include multiple CSIs, the candidate available PUCCH resources may be resources in a first PUCCH resource set for HARQ feedback of a semi-persistently scheduled PDSCH and a first PUCCH resource set for HARQ feedback of a dynamically scheduled PDSCH, as in the second case; alternatively, the candidate available PUCCH resource is a resource in a first PUCCH resource set for HARQ feedback of the semi-persistently scheduled PDSCH, as in the first case.
The determining of the candidate available PUCCH resources of step 110 may also be determining dedicated resources configured by RRC signaling as the candidate available PUCCH resources.
A third way of determining the available PUCCH resources for step 120 is described below.
And in the determined time length, if the number of the HARQ feedbacks is multiple and the number of the time slots or the sub-time slots where the candidate available PUCCH resources are located is multiple, allocating all HARQ feedbacks which need to be sent or received in the determined time length and contain the plurality of the semi-persistent scheduling PDSCH of the HARQ feedbacks to the time slots or the sub-time slots where the candidate available PUCCH resources are located approximately evenly, and taking the candidate available PUCCH resources of the time slots or the sub-time slots where the HARQ feedbacks are allocated as the available PUCCH resources. The determined time length is, for example, a downlink/uplink transmission period, or other configured time length, or other predefined time length. The original PUCCH resource of the HARQ feedback collides with the symbol which can not be used for uplink. And the HARQ feedback needing to be sent or received within the determined time length comprises HARQ feedback of which the original PUCCH resources collide with symbols which cannot be used for uplink and HARQ feedback of which the original PUCCH resources do not collide with symbols which cannot be used for uplink.
The HARQ feedback of the SPS PDSCH needs to be transmitted or received within the time length of the time slot or the sub-time slot of the HARQ feedback determined by the offset indicated by the PDSCH-to-HARQ feedback timing indicator carried in the DCI or the time slot or the sub-time slot of the HARQ feedback determined by the offset configured by the RRC signaling.
And setting the number of time slots or sub-time slots with candidate available PUCCH resources in the time length as M, setting the number of HARQ feedbacks needing to be sent or received in the time length as C, and numbering the HARQ feedbacks needing to be sent according to the time sequence of the corresponding PDSCH finish. Definition M 1 Mod (C, M), mod is a remainder function,
Figure BDA0002998792270000171
if M is 1 (> 0), M =0,1, M, the slot or sub-slot M of the mth PUCCH resource available as a candidate 1 -1 for transmitting the m.K 1 +k，k＝0，1，...，K 1 -1 HARQ feedback. M = M of M-th slot or subslot of PUCCH resources available as candidates 1 ，M 1 +1,.. Ang., M-1, for transmitting the Mth 1 ·K 1 +(m-M 1 )·K 2 +k，k＝0，1，...，K 2 -1 HARQ feedback.
For example, in a downlink/uplink transmission period, assuming that K1=1, the number of slots with candidate available PUCCH is 2, the number of HARQ feedbacks of the original PUCCH resource colliding with symbols that cannot be used for uplink is 2, and the number of HARQ feedbacks of the original PUCCH resource not colliding with symbols that cannot be used for uplink is 1, according to the foregoing formula, a schematic diagram of HARQ feedback transmission in the slot where the candidate available PUCCH resource is located is shown in fig. 3.
In a scenario of multiple uplink carriers, in step 110, when a PUCCH resource of HARQ feedback of SPS PDSCH or dynamically scheduled PDSCH collides with a symbol that cannot be used for uplink, a second carrier different from a first carrier where HARQ feedback is located determines a candidate available PUCCH resource at a time domain position corresponding to a configured time domain position of HARQ feedback. As shown in fig. 4, the original time domain position of the configured HARQ feedback is downlink on the first carrier, transmission collision occurs, and the time domain position corresponding to the time domain position of the configured HARQ feedback is uplink on the second carrier, so the HARQ feedback can be switched to the second carrier and transmitted on the time domain position corresponding to the time domain position of the configured HARQ feedback.
The time domain position of HARQ feedback is determined by the offset indicated by the PDSCH to HARQ feedback timing indicator carried in DCI, or the offset configured by RRC signaling. The first carrier where the default HARQ feedback is located is configured by RRC signaling. And if the default first carrier has symbols which cannot be used for uplink in the configured time domain position of the HARQ feedback, searching a second carrier which has candidate available PUCCH resources in the time domain position corresponding to the configured time domain position of the HARQ feedback to transmit the HARQ feedback. The second carrier with the candidate available PUCCH resource may be searched in an order of increasing the number of the primary carrier first and then the secondary carriers.
The symbols on the default first PUCCH carrier that cannot be used for uplink include: a semi-statically configured downstream symbol, a symbol where SSB is located, and a symbol where CORESET #0 is located.
For the HARQ feedback of the PDSCH subjected to dynamic scheduling, when a second carrier with candidate available PUCCH resources is searched, symbols where the candidate available PUCCH resources are located comprise semi-statically configured uplink symbols and semi-statically configured flexible symbols. HARQ feedback for dynamically scheduled PDSCH may be sent on semi-statically configured flexible symbols and not discarded.
For the HARQ feedback of the PDSCH subjected to semi-persistent scheduling, the symbols where the candidate available PUCCH resources are located preferably only comprise semi-statically configured uplink symbols. If the second carrier with the candidate available PUCCH resources is not found, the symbols with the candidate available PUCCH resources also comprise semi-statically configured flexible symbols. Because the symbol where the candidate available PUCCH resource is preferentially selected only comprises the carrier of the uplink symbol configured in a semi-static manner, the probability that the HARQ feedback is discarded is reduced.
When the PUCCH resources fed back by the HARQ of the SPS PDSCH collide with the semi-statically configured flexible symbols, when the semi-statically configured flexible symbols are dynamically scheduled by the DCI to be downlink transmission and/or are indicated by the SFI to be downlink symbols or flexible symbols, the HARQ feedback can be discarded, and in this case, carrier switching is not carried out. If carrier switching is performed in such a situation, when the UE loses the DCI for scheduling or the DCI for carrying the SFI, the base station and the UE may understand that the carriers transmitted by the PUCCH are inconsistent.
In the method of the second aspect of the present disclosure, for HARQ-ACK feedback of the dynamically scheduled PDSCH, when the time domain position of the candidate available PUCCH resource of the second carrier is earlier than the time domain position of the candidate available PUCCH resource of the default first carrier, the HARQ feedback is switched to the second carrier for transmission or reception, so that the time delay of the HARQ-ACK feedback can be reduced. For the HARQ feedback of the SPS PDSCH, when the configured time domain position of the HARQ feedback and PUCCH resources of the first carrier collide with symbols which cannot be used for uplink, the HARQ feedback is switched to the second carrier to be sent, so that the resource waste caused by PDSCH retransmission due to the discard of the HARQ-ACK feedback can be avoided, and the time delay required by the successful transmission of the PDSCH is reduced.
Fig. 5 shows a schematic diagram of a terminal of some embodiments of the present disclosure.
As shown in fig. 5, the terminal 50 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 and to transmit HARQ feedback on available PUCCH resources based on instructions stored in the memory 510.
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 60 of this embodiment includes: a memory 610; and a processor 620 coupled to the memory 610, the processor 620 configured to perform a transmission method of hybrid automatic repeat request feedback and receive HARQ feedback on available PUCCH resources based on instructions stored in the memory 610.
Fig. 7 illustrates a schematic diagram of a communication system of some embodiments of the present disclosure.
As shown in fig. 7, the communication system 70 of this embodiment includes: a terminal 50 and a base station 60.
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 transmission method 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 flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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 (17)

1. A method for HARQ feedback transmission, comprising:
in the configured time domain position of the HARQ feedback, when the PUCCH resource used for the HARQ feedback conflicts with the symbol which cannot be used for uplink, determining a candidate available PUCCH resource, wherein the symbol where the candidate available PUCCH resource is located comprises the uplink symbol configured in a semi-static manner;
determining available PUCCH resources for transmitting or receiving the HARQ feedback on the available PUCCH resources according to the candidate available PUCCH resources.
2. The method of claim 1, wherein determining candidate available PUCCH resources comprises:
determining candidate available PUCCH resources from the time slot of the configured time domain position of the HARQ feedback or the first time slot after the time slot, and if no candidate available PUCCH resource exists in one time slot, continuously determining the candidate available PUCCH resources in the next time slot;
or, determining candidate available PUCCH resources from a sub-slot where the configured time domain position of the HARQ feedback is located or a first sub-slot after the configured time domain position of the HARQ feedback is located, and if there is no candidate available PUCCH resource in one sub-slot, continuing to determine candidate available PUCCH resources in a next sub-slot.
3. The method according to claim 1 or 2,
when the preset condition is met, the symbols where the candidate available PUCCH resources are located also comprise semi-statically configured flexible symbols,
wherein the preset conditions include: in a downlink and uplink transmission period, the ratio information between the number of the semi-statically configured uplink symbols and the number of the semi-statically configured flexible symbols is smaller than a first preset value, or the number of the semi-statically configured flexible symbols is larger than a second preset value.
4. The method of claim 1 or 2, wherein determining available PUCCH resources based on the candidate available PUCCH resources comprises:
judging whether the code rate of the uplink control information transmitted on the candidate available PUCCH resources is greater than the configured maximum code rate; if not, the candidate available PUCCH resources are used as available PUCCH resources; if yes, the candidate available PUCCH resource is not used as the available PUCCH resource, and whether the code rate for transmitting the uplink control information in the next candidate available PUCCH resource is larger than the configured maximum code rate is continuously judged;
and/or the presence of a gas in the gas,
judging whether the bit number of the uplink control information transmitted in the candidate available PUCCH resources is larger than a preset value or not; if not, the candidate available PUCCH resources are used as available PUCCH resources; if yes, the candidate available PUCCH resource is not used as the available PUCCH resource, and whether the bit number of the uplink control information transmitted in the next candidate available PUCCH resource is larger than a preset value or not is continuously judged.
5. The method of claim 4,
if the PUCCH format corresponding to the candidate available PUCCH resource is the first PUCCH format, judging whether the code rate of uplink control information transmitted by the candidate available PUCCH resource is greater than the configured maximum code rate;
and if the PUCCH format corresponding to the candidate available PUCCH resource is the second PUCCH format, judging whether the bit number of the uplink control information transmitted in the candidate available PUCCH resource is larger than a preset value.
6. The method of claim 4,
the uplink control information for making the determination does not include HARQ feedback of the dynamically scheduled PDSCH; or, the uplink control information for the determination is only HARQ feedback of the semi-persistent scheduled PDSCH.
7. The method of claim 1, wherein determining available PUCCH resources based on the candidate available PUCCH resources comprises:
and within the determined time length, if the number of the HARQ feedbacks is multiple and the number of the time slots or the sub-time slots in which the candidate available PUCCH resources are located is multiple, distributing all HARQ feedbacks, which need to be sent or received within the determined time length and contain the plurality of HARQ feedbacks, of the semi-persistent scheduling PDSCH to the multiple time slots or the sub-time slots approximately evenly, and using the candidate available PUCCH resources of the time slots or the sub-time slots to which the HARQ feedbacks are distributed as the available PUCCH resources.
8. The method of claim 4, wherein determining candidate available PUCCH resources comprises:
candidate available PUCCH resources are determined from one or more of a first PUCCH resource set for HARQ feedback of a semi-persistently scheduled PDSCH, a second PUCCH resource set for HARQ feedback of a dynamically scheduled PDSCH, and a third PUCCH resource set for multi-Channel State Information (CSI) transmission.
9. The method of claim 8,
determining candidate available PUCCH resources in a first PUCCH resource set for HARQ feedback for a semi-persistently scheduled PDSCH comprises:
determining one resource in the first PUCCH resource set as a candidate available PUCCH resource according to the number of bits of uplink control information needing to be sent or received in one time slot or sub-time slot;
or, one resource in the first PUCCH resource set configured by the downlink control information for activating the semi-persistent PDSCH scheduling is a candidate available PUCCH resource.
10. The method of claim 8,
determining candidate available PUCCH resources in a first PUCCH resource set for HARQ feedback of a semi-persistently scheduled PDSCH and a second PUCCH resource set for HARQ feedback of a dynamically scheduled PDSCH includes:
when uplink control information needing to be transmitted in one time slot or sub-time slot does not comprise HARQ feedback of a dynamically scheduled PDSCH, determining candidate available PUCCH resources from a first PUCCH resource set of the HARQ feedback of the PDSCH for semi-persistent scheduling, and if the candidate available PUCCH resources are not found in the first PUCCH resource set of the HARQ feedback of the PDSCH for semi-persistent scheduling, determining the candidate available PUCCH resources from a second PUCCH resource set of the HARQ feedback of the PDSCH for dynamic scheduling;
when the uplink control information required to be transmitted in one slot or sub-slot includes HARQ feedback of the dynamically scheduled PDSCH, determining candidate available PUCCH resources from a second PUCCH resource set for the HARQ feedback of the dynamically scheduled PDSCH.
11. The method of claim 8,
the resources in the third PUCCH resource set for multi-channel state information CSI transmission may be candidate available PUCCH resources,
when the uplink control information to be transmitted in one slot or sub-slot includes a plurality of CSI, determining candidate available PUCCH resources from a third PUCCH resource set for multi-Channel State Information (CSI) transmission.
12. The method of claim 1, wherein determining candidate available PUCCH resources comprises:
and determining candidate available PUCCH resources at a time domain position corresponding to the configured time domain position of the HARQ feedback on a second carrier different from the first carrier on which the HARQ feedback is positioned.
13. The method of claim 12,
for the HARQ feedback of the PDSCH subjected to dynamic scheduling, the symbols where the candidate available PUCCH resources are located comprise semi-statically configured uplink symbols and semi-statically configured flexible symbols;
and/or the presence of a gas in the gas,
for HARQ feedback of the PDSCH subjected to semi-persistent scheduling, the symbol where the candidate available PUCCH resource is located preferably only comprises the uplink symbol subjected to semi-static configuration; if the second carrier with the candidate available PUCCH resources is not found, the symbols where the candidate available PUCCH resources are located also comprise flexible symbols with semi-static configuration.
14. A terminal, comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the transmission method of hybrid automatic repeat request feedback of any of claims 1-13 and to send HARQ feedback on available PUCCH resources based on instructions stored in the memory.
15. A base station, comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the transmission method of hybrid automatic repeat request feedback of any of claims 1-13 and receive HARQ feedback on available PUCCH resources based on instructions stored in the memory.
16. A communication system, comprising: the terminal of claim 14 and the base station of claim 15.
17. A non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method for transmission of hybrid automatic repeat request feedback of any of claims 1-13.
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CN112351504A (en) * 2019-08-08 2021-02-09 大唐移动通信设备有限公司 HARQ-ACK feedback method, terminal and network side equipment
CN112351499A (en) * 2019-08-09 2021-02-09 华为技术有限公司 Method and device for sending hybrid automatic repeat request acknowledgement information

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