WO2024082350A1 - Procédés et appareils de multiplexage de rétroaction harq-ack sur un pusch pour agrégation de porteuses - Google Patents

Procédés et appareils de multiplexage de rétroaction harq-ack sur un pusch pour agrégation de porteuses Download PDF

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Publication number
WO2024082350A1
WO2024082350A1 PCT/CN2022/130020 CN2022130020W WO2024082350A1 WO 2024082350 A1 WO2024082350 A1 WO 2024082350A1 CN 2022130020 W CN2022130020 W CN 2022130020W WO 2024082350 A1 WO2024082350 A1 WO 2024082350A1
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pusch
puschs
determining
serving cell
serving cells
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PCT/CN2022/130020
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English (en)
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Haipeng Lei
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Lenovo (Beijing) Limited
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Priority to PCT/CN2022/130020 priority Critical patent/WO2024082350A1/fr
Publication of WO2024082350A1 publication Critical patent/WO2024082350A1/fr

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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
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • 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
    • H04L5/0091—Signaling for the administration of the divided path

Definitions

  • Embodiments of the present disclosure generally relate to wireless communication technology, and more particularly to hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback multiplexing on a physical uplink shared channel (PUSCH) for carrier aggregation (CA) .
  • HARQ-ACK hybrid automatic repeat request acknowledgement
  • PUSCH physical uplink shared channel
  • CA carrier aggregation
  • Wireless communication systems are widely deployed to provide various telecommunication services, such as telephony, video, data, messaging, broadcasts, and so on.
  • Wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., time, frequency, and power) .
  • Examples of wireless communication systems may include fourth generation (4G) systems, such as long term evolution (LTE) systems, LTE-advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may also be referred to as new radio (NR) systems.
  • 4G systems such as long term evolution (LTE) systems, LTE-advanced (LTE-A) systems, or LTE-A Pro systems
  • 5G systems which may also be referred to as new radio (NR) systems.
  • a base station may transmit data signals to a user equipment (UE) via a physical downlink shared channel (PDSCH) , or a UE may transmit data signals to a BS via a PUSCH.
  • UE user equipment
  • PDSCH physical downlink shared channel
  • CA technology may be used in the wireless communication system.
  • CA technology may refer to aggregating spectrum resources (e.g., carriers) from the same frequency band or different frequency bands for a UE.
  • a plurality of PDSCHs may be transmitted on a plurality of carriers, or a plurality of PUSCHs may be transmitted on a plurality of carriers.
  • the UE may transmit HARQ-ACK feedback for the plurality of PDSCHs. Accordingly, there is a need for handling HARQ-ACK feedback transmission when a plurality of PUSCHs is scheduled in a wireless communication system.
  • the UE may include: a transceiver configured to receive one or more downlink control information (DCI) formats scheduling a plurality of PUSCHs on a plurality of serving cells of the UE; a processor coupled to the transceiver and configured to: determine that one or more PUSCHs of the plurality of PUSCHs overlap a physical uplink control channel (PUCCH) carrying HARQ-ACK feedback for downlink transmission; and determine a reference PUSCH among the plurality of PUSCHs for multiplexing the HARQ-ACK feedback; and wherein the transceiver is further configured to transmit the plurality of PUSCHs, wherein the HARQ-ACK feedback is multiplexed on the reference PUSCH.
  • DCI downlink control information
  • the reference PUSCH satisfies the UE's processing delay requirement on multiplexing the HARQ-ACK feedback.
  • a DCI format of the one or more DCI formats includes a beta offset indicator applicable for the reference PUSCH for adjusting resources of the HARQ-ACK feedback on the reference PUSCH.
  • the one or more DCI formats comprise at least one multi-cell scheduling DCI format, each of the at least one multi-cell scheduling DCI format schedules a respective first set of serving cells among the plurality of serving cells, and the respective first set of serving cells is a subset of a corresponding second set of serving cells configured for multi-cell scheduling using a multi-cell scheduling DCI format.
  • the corresponding second set of serving cells is configured with a parameter for determining control channel elements (CCEs) of physical downlink control channel (PDCCH) candidates for monitoring the multi-cell scheduling DCI format.
  • CCEs control channel elements
  • PDCCH physical downlink control channel
  • a DCI size of each of the at least one multi-cell scheduling DCI format is counted on a serving cell of the corresponding second set of serving cells.
  • BD blind detection
  • CCE control channel element
  • a search space of each of the at least one multi-cell scheduling DCI format is configured on a serving cell of the corresponding second set of serving cells.
  • the serving cell of the corresponding second set of serving cells is configured by radio resource control (RRC) signaling.
  • RRC radio resource control
  • the processor is configured to perform at least one of the following: determining the reference PUSCH to be a PUSCH on a primary cell (PCell) or a primary secondary cell (PSCell) of the plurality of serving cells; determining the reference PUSCH to be a PUSCH which ends latest among the plurality of PUSCHs; determining the reference PUSCH to be a PUSCH which starts earliest among the plurality of PUSCHs; determining the reference PUSCH to be a PUSCH which starts latest among the plurality of PUSCHs; determining the reference PUSCH to be a PUSCH with the smallest serving cell index among the plurality of serving cells; determining the reference PUSCH to be a PUSCH with the largest serving cell index among the plurality of serving cells; determining the reference PUSCH to be a PUSCH on a serving cell with a predefined order among a combination of serving cells indicated by a DCI format among the one or more
  • the processor is configured to perform at least one of the following: in the case that only one PUSCH of the plurality of PUSCHs overlaps the PUCCH, determining the reference PUSCH to be the one PUSCH; determining the reference PUSCH to be a PUSCH which ends latest among the one or more PUSCHs; determining the reference PUSCH to be a PUSCH which starts earliest among the one or more PUSCHs; determining the reference PUSCH to be a PUSCH which starts latest among the one or more PUSCHs; determining the reference PUSCH to be a PUSCH with the smallest serving cell index among the one or more PUSCHs; determining the reference PUSCH to be a PUSCH with the largest serving cell index among the one or more PUSCHs; determining the reference PUSCH to be a PUSCH with the most time-frequency resources among the one or more PUSCHs; determining the reference PUSCH to be a PUSCH with a PUSCH with the most time-frequency resources
  • the BS may include: a transceiver configured to transmit, to a UE, one or more DCI formats scheduling a plurality of PUSCHs on a plurality of serving cells of the UE; a processor coupled to the transceiver and configured to: determine that one or more PUSCHs of the plurality of PUSCHs overlap a PUCCH carrying HARQ-ACK feedback for downlink transmission; and determine a reference PUSCH among the plurality of PUSCHs for multiplexing the HARQ-ACK feedback; and wherein the transceiver is further configured to receive the plurality of PUSCHs, wherein the HARQ-ACK feedback is multiplexed on the reference PUSCH.
  • the reference PUSCH satisfies the UE's processing delay requirement on multiplexing the HARQ-ACK feedback.
  • a DCI format of the one or more DCI formats includes a beta offset indicator applicable for the reference PUSCH for adjusting resources of the HARQ-ACK feedback on the reference PUSCH.
  • the one or more DCI formats comprise at least one multi-cell scheduling DCI format, each of the at least one multi-cell scheduling DCI format schedules a respective first set of serving cells among the plurality of serving cells, and the respective first set of serving cells is a subset of a corresponding second set of serving cells configured for multi-cell scheduling using a multi-cell scheduling DCI format.
  • the corresponding second set of serving cells is configured with a parameter for determining control channel elements (CCEs) of physical downlink control channel (PDCCH) candidates for monitoring the multi-cell scheduling DCI format.
  • CCEs control channel elements
  • PDCCH physical downlink control channel
  • a DCI size of each of the at least one multi-cell scheduling DCI format is counted on a serving cell of the corresponding second set of serving cells.
  • a BD or CCE budget of each of the at least one multi-cell scheduling DCI format is counted on a serving cell of the corresponding second set of serving cells.
  • a search space of each of the at least one multi-cell scheduling DCI format is configured on a serving cell of the corresponding second set of serving cells.
  • the transceiver is further configured to transmit radio resource control (RRC) signaling to the UE to indicate the serving cell of the corresponding second set of serving cells to the UE.
  • RRC radio resource control
  • the processor is configured to perform at least one of the following: determining the reference PUSCH to be a PUSCH on a PCell or a PSCell of the plurality of serving cells; determining the reference PUSCH to be a PUSCH which ends latest among the plurality of PUSCHs; determining the reference PUSCH to be a PUSCH which starts earliest among the plurality of PUSCHs; determining the reference PUSCH to be a PUSCH which starts latest among the plurality of PUSCHs; determining the reference PUSCH to be a PUSCH with the smallest serving cell index among the plurality of serving cells; determining the reference PUSCH to be a PUSCH with the largest serving cell index among the plurality of serving cells; determining the reference PUSCH to be a PUSCH on a serving cell with a predefined order among a combination of serving cells indicated by a DCI format among the one or more DCI formats; determining the reference PUSCH to be a PUSCH on a serving cell with
  • the processor is configured to perform at least one of the following: in the case that only one PUSCH of the plurality of PUSCHs overlaps the PUCCH, determining the reference PUSCH to be the one PUSCH; determining the reference PUSCH to be a PUSCH which ends latest among the one or more PUSCHs; determining the reference PUSCH to be a PUSCH which starts earliest among the one or more PUSCHs; determining the reference PUSCH to be a PUSCH which starts latest among the one or more PUSCHs; determining the reference PUSCH to be a PUSCH with the smallest serving cell index among the one or more PUSCHs; determining the reference PUSCH to be a PUSCH with the largest serving cell index among the one or more PUSCHs; determining the reference PUSCH to be a PUSCH with the most time-frequency resources among the one or more PUSCHs; determining the reference PUSCH to be a PUSCH with a PUSCH with the most time-frequency resources
  • Some embodiments of the present disclosure provide a method performed by a UE.
  • the method may include: receiving one or more DCI formats scheduling a plurality of PUSCHs on a plurality of serving cells of the UE; determining that one or more PUSCHs of the plurality of PUSCHs overlap a PUCCH carrying HARQ-ACK feedback for downlink transmission; determining a reference PUSCH among the plurality of PUSCHs for multiplexing the HARQ-ACK feedback; and transmitting the plurality of PUSCHs, wherein the HARQ-ACK feedback is multiplexed on the reference PUSCH.
  • Some embodiments of the present disclosure provide a method performed by a BS.
  • the method may include: transmitting, to a UE, one or more DCI formats scheduling a plurality of PUSCHs on a plurality of serving cells of the UE; determining that one or more PUSCHs of the plurality of PUSCHs overlap a PUCCH carrying HARQ-ACK feedback for downlink transmission; determining a reference PUSCH among the plurality of PUSCHs for multiplexing the HARQ-ACK feedback; and receiving the plurality of PUSCHs, wherein the HARQ-ACK feedback is multiplexed on the reference PUSCH.
  • the apparatus may include: at least one non-transitory computer-readable medium having stored thereon computer-executable instructions; at least one receiving circuitry; at least one transmitting circuitry; and at least one processor coupled to the at least one non-transitory computer-readable medium, the at least one receiving circuitry and the at least one transmitting circuitry, wherein the at least one non-transitory computer-readable medium and the computer executable instructions may be configured to, with the at least one processor, cause the apparatus to perform a method according to some embodiments of the present disclosure.
  • FIG. 1 illustrates a schematic diagram of a wireless communication system in accordance with some embodiments of the present disclosure
  • FIGS. 2 and 3 illustrate schematic diagrams of a DCI format scheduling multiple PUSCHs in accordance with some embodiments of the present disclosure
  • FIG. 4 illustrates a schematic diagram of multiple DCI formats scheduling multiple PUSCHs in accordance with some embodiments of the present disclosure
  • FIG. 5 is a flow chart illustrating an exemplary method for HARQ-ACK feedback multiplexing on a PUSCH according to some embodiments of the present disclosure.
  • FIG. 6 illustrates a simplified block diagram of an exemplary apparatus for HARQ-ACK feedback multiplexing on a PUSCH according to some embodiments of the present disclosure.
  • FIG. 1 illustrates a schematic diagram of a wireless communication system 100 in accordance with some embodiments of the present disclosure.
  • wireless communication system 100 may include some UEs 101 (e.g., UE 101a and UE 101b) and a base station (e.g., BS 102) . Although a specific number of UEs 101 and BS 102 is depicted in FIG. 1, it is contemplated that any number of UEs and BSs may be included in the wireless communication system 100.
  • the UE (s) 101 may include computing devices, such as desktop computers, laptop computers, personal digital assistants (PDAs) , tablet computers, smart televisions (e.g., televisions connected to the Internet) , set-top boxes, game consoles, security systems (including security cameras) , vehicle on-board computers, network devices (e.g., routers, switches, and modems) , or the like.
  • the UE (s) 101 may include a portable wireless communication device, a smart phone, a cellular telephone, a flip phone, a device having a subscriber identity module, a personal computer, a selective call receiver, or any other device that is capable of sending and receiving communication signals on a wireless network.
  • the UE (s) 101 includes wearable devices, such as smart watches, fitness bands, optical head-mounted displays, or the like. Moreover, the UE (s) 101 may be referred to as a subscriber unit, a mobile, a mobile station, a user, a terminal, a mobile terminal, a wireless terminal, a fixed terminal, a subscriber station, a user terminal, or a device, or described using other terminology used in the art.
  • the UE (s) 101 may communicate with the BS 102 via uplink (UL) communication signals.
  • UL uplink
  • the BS 102 may be distributed over a geographic region.
  • the BS 102 may also be referred to as an access point, an access terminal, a base, a base unit, a macro cell, a Node-B, an evolved Node B (eNB) , a gNB, a Home Node-B, a relay node, or a device, or described using other terminology used in the art.
  • the BS 102 is generally a part of a radio access network that may include one or more controllers communicably coupled to one or more corresponding BSs 102.
  • the BS 102 may communicate with UE(s) 101 via downlink (DL) communication signals.
  • DL downlink
  • the wireless communication system 100 may be compatible with any type of network that is capable of sending and receiving wireless communication signals.
  • the wireless communication system 100 is compatible with a wireless communication network, a cellular telephone network, a time division multiple access (TDMA) -based network, a code division multiple access (CDMA) -based network, an orthogonal frequency division multiple access (OFDMA) -based network, an LTE network, a 3GPP-based network, a 3GPP 5G network, a satellite communications network, a high altitude platform network, and/or other communications networks.
  • TDMA time division multiple access
  • CDMA code division multiple access
  • OFDMA orthogonal frequency division multiple access
  • the wireless communication system 100 is compatible with 5G NR of the 3GPP protocol.
  • BS 102 may transmit data using an orthogonal frequency division multiple (OFDM) modulation scheme on the DL and the UE (s) 101 may transmit data on the UL using a discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-S-OFDM) or cyclic prefix-OFDM (CP-OFDM) scheme.
  • DFT-S-OFDM discrete Fourier transform-spread-orthogonal frequency division multiplexing
  • CP-OFDM cyclic prefix-OFDM
  • the wireless communication system 100 may implement some other open or proprietary communication protocols, for example, WiMAX, among other protocols.
  • the BS 102 and UE (s) 101 may communicate using other communication protocols, such as the IEEE 802.11 family of wireless communication protocols. Further, in some embodiments of the present disclosure, the BS 102 and UE (s) 101 may communicate over licensed spectrums, whereas in some other embodiments, the BS 102 and UE (s) 101 may communicate over unlicensed spectrums.
  • the present disclosure is not intended to be limited to the implementation of any particular wireless communication system architecture or protocol.
  • NR supports a wide range of spectrums in different frequency ranges.
  • 5G Advanced it is expected that the availability of the spectrum will be increased, which is possibly due to re-farming the bands originally used for previous cellular generation networks.
  • FR1 e.g., 450MHz-6000MHz
  • the available spectrum bands tend to be more fragmented and scattered with a narrower bandwidth.
  • FR2 24250MHz-52600MHz
  • FR1 frequency range 1
  • scheduling mechanisms may only allow scheduling a single PUSCH or PDSCH on a single cell per a scheduling DCI. As more scattered spectrum bands or spectrums with wider bandwidth becomes available, it is advisable to allow simultaneous scheduling of multiple cells.
  • NR is designed to support a max of 16 component carriers (CCs) in the case of CA or a max of 32 CCs in the case of dual connectively (DC) .
  • CCs component carriers
  • DC dual connectively
  • one DCI can schedule at most one carrier by cross-carrier scheduling or self-scheduling. This requires much signaling overhead for PDCCHs to schedule PDSCHs when the number of carriers configured for a UE is large. To reduce signaling overhead, it is beneficial to use a single DCI to schedule multiple PDSCHs or PUSCHs on multiple carriers configured to the UE.
  • a PUCCH carrying HARQ-ACK feedback for downlink transmission may overlap one or more PUSCHs of multiple PUSCHs co-scheduled by a single DCI.
  • how to multiplex the HARQ-ACK feedback on the multiple PUSCHs co-scheduled by the single DCI needs to be solved. If this technical problem is not solved, the HARQ-ACK codebook may be mismatched between a UE and a BS, e.g., the HARQ-ACK codebook generated by UE may not match what the BS expects.
  • FIG. 2 illustrates a schematic diagram of a DCI format scheduling multiple PUSCHs in accordance with some embodiments of the present disclosure.
  • a DCI format (also referred to as a DCI) may schedule (e.g., co-schedule) four PUSCHs on four different serving cells (or four different component carriers (CCs) ) .
  • a serving cell may be represented by a CC.
  • the DCI may schedule PUSCH 1 on CC1, PUSCH 2 on CC2, PUSCH 3 on CC3, and PUSCH 4 on CC4.
  • the DCI may be transmitted on one cell of CC1 to CC4.
  • the DCI may be transmitted on a cell other than CC1 to CC4.
  • HARQ-ACK feedback for a PDSCH (s) is to be transmitted in a PUCCH which overlaps the 4 co-scheduled PUSCHs in a time domain.
  • the HARQ-ACK feedback may be multiplexed on one PUSCH of the 4 co-scheduled PUSCHs. Then, which PUSCH of the 4 co-scheduled PUSCHs may be used to multiplex the HARQ-ACK feedback needs to be resolved.
  • embodiments of the present disclosure propose solutions for HARQ-ACK feedback multiplexing on a PUSCH for CA, which can at least solve the above technical problems.
  • embodiments of the present disclosure provide several solutions for determining a reference PUSCH to multiplex the HARQ-ACK feedback when multiple PUSCHs are scheduled by one or more DCI formats. More details on the embodiments of the present disclosure will be illustrated in the following text in combination with the appended drawings.
  • a BS may configure a set of serving cells for multi-cell scheduling via a multi-cell scheduling DCI format (named as DCI format 0_X for uplink scheduling or DCI format 1_X for downlink scheduling for simplicity) for a UE (e.g., UE 101 as shown in FIG. 1) .
  • a multi-cell scheduling DCI format named as DCI format 0_X for uplink scheduling or DCI format 1_X for downlink scheduling for simplicity
  • the set of serving cells may include up to 4 cells, 8 cells, or other number of cells.
  • the set of serving cells may be associated with a table configured by RRC signaling or a predefined table.
  • Each row of the table may define a co-scheduled cell combination (e.g., a set of co-scheduled cells within the set of serving cells) .
  • a maximum of 4 cells within the set of serving cells may be defined in each co-scheduled cell combination, i.e., a maximum of 4 cells within the set of serving cells may be scheduled by a multi-cell scheduling DCI format.
  • the BS may transmit a multi-cell scheduling DCI format scheduling a plurality of PUSCHs on a plurality of serving cells to the UE.
  • Each PUSCH in the plurality of PUSCHs may be scheduled on a corresponding serving cell of the plurality of serving cells.
  • the plurality of serving cells may be a subset of the set of serving cells as stated above.
  • the multi-cell scheduling DCI format may include an indicator indicating a row of the table associated with the set of cells, and the row may define a set of co-scheduled cells.
  • the plurality of serving cells may include one or more cells in the set of co-scheduled cells, which may be a subset of the set of serving cells configured for multi-cell scheduling using DCI format 0_X or DCI format 1_X, which will be illustrated below in detail.
  • the multi-cell scheduling DCI format may include a UL downlink assignment index (DAI) .
  • the DAI may indicate the number of ⁇ serving cell, PDCCH monitoring occasion ⁇ -pair (s) in which PDSCH transmission (s) associated with PDCCH or PDCCH indicating semi-persistent scheduling (SPS) PDSCH release or DCI format 1_1 indicating secondary cell (SCell) dormancy is present.
  • the multi-cell scheduling DCI format may include a beta offset indicator.
  • the UE or the BS may determine that one or more PUSCHs of the plurality of PUSCHs overlap a PUCCH carrying HARQ-ACK feedback for a downlink transmission (e.g., one or more PDSCHs) .
  • the UE and the BS may determine a reference PUSCH among the plurality of PUSCHs for multiplexing the HARQ-ACK feedback.
  • the UE may not transmit the PUCCH and thus the BS may not receive the PUCCH.
  • the beta offset indicator included in the multi-cell scheduling DCI format may be applicable for the reference PUSCH for adjusting resources of the HARQ-ACK feedback on the reference PUSCH.
  • the reference PUSCH for multiplexing the HARQ-ACK feedback may satisfy a condition (s) .
  • the reference PUSCH may be a PUSCH actually transmitted (e.g., denoted as condition (1) ) .
  • Whether a PUSCH is actually transmitted may be determined as follows: for the one or more co-scheduled cells indicated by the multi-cell scheduling DCI format, if, for a cell from the one or more co-scheduled cells, at least one symbol from a set of symbols where the UE is scheduled PUSCH transmission in the cell is a downlink symbol (e.g., as indicated by a cell common UL/DL configuration such as tdd-UL-DL-ConfigurationCommon as specified in 3GPP standard documents or a UE specific UL/DL configuration such as tdd-UL-DL-ConfigurationDedicated as specified in 3GPP standard documents) , the UE does not transmit the PUSCH in the cell.
  • a cell common UL/DL configuration such as tdd-UL-DL-ConfigurationCommon as specified in 3GPP standard documents
  • the reference PUSCH for multiplexing the HARQ-ACK feedback may satisfy the UE's processing delay requirement (e.g., denoted as condition (2) ) .
  • the plurality of PUSCHs based on which the reference PUSCH is determined may satisfy at least one of condition (1) or condition (2) , and the plurality of serving cells are the serving cells in the set of co-scheduled cells indicated by the multi-cell scheduling DCI format on which the plurality of PUSCHs are transmitted.
  • the following embodiments may provide several solutions for determining the reference PUSCH from the plurality of PUSCHs.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH on the PCell or the PSCell of the plurality of serving cells.
  • the HARQ-ACK feedback may be transmitted on a PCell or a PSCell with high reliability.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH which ends latest among the plurality of PUSCHs. In such embodiments, the UE may have sufficient time to multiplex HARQ-ACK feedback on the reference PUSCH.
  • FIG. 3 illustrates a schematic diagram of a DCI format scheduling multiple PUSCHs in accordance with some embodiments of the present disclosure.
  • a multi-cell scheduling DCI may schedule four PUSCHs on four different serving cells.
  • the multi-cell scheduling DCI may schedule PUSCH 1 on CC1, PUSCH 2 on CC2, PUSCH 3 on CC3, and PUSCH 4 on CC4.
  • the ascending order of the serving cell indices of CC1 to CC4 is CC1 -> CC2 -> CC3 -> CC4.
  • the DCI is transmitted on CC1.
  • the DCI can be transmitted on a CC different from CC1 to CC4.
  • HARQ-ACK feedback for a PDSCH (s) is to be transmitted in a PUCCH which overlaps PUSCH 2 and PUSCH 4 in the time domain.
  • the BS or the UE may determine PUSCH 2 to be the reference PUSCH because PUSCH 2 ends latest among the 4 PUSCHs.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH which starts earliest among the plurality of PUSCHs. In such embodiments, the UE may transmit the HARQ-ACK feedback at the earliest time. Referring to FIG. 3, in solution #3, the BS and the UE may determine PUSCH 4 to be the reference PUSCH because PUSCH 4 starts earliest among the 4 PUSCHs.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH which starts latest among the plurality of PUSCHs. In such embodiments, the UE may have sufficient time to multiplex HARQ-ACK feedback on the reference PUSCH. Referring to FIG. 3, in solution #4, the BS and the UE may determine PUSCH 2 to be the reference PUSCH because PUSCH 2 starts latest among the 4 PUSCHs.
  • solution #5 the BS or the UE may determine the reference PUSCH to be a PUSCH with a pre-defined serving cell index among the plurality of serving cells.
  • solution #5 may be used in combination with other solutions for determining a reference PUSCH, for example, one of solutions #2-4. For instance, when there are two or more PUSCHs with the same starting time or ending time, solution #5 may be further employed.
  • the pre-defined serving cell index may be the smallest serving cell index among the plurality of serving cells.
  • the BS and the UE may determine PUSCH 1 to be the reference PUSCH because PUSCH 1 is transmitted on CC1 which has the smallest serving cell index.
  • the pre-defined serving cell index may be the largest serving cell index among the plurality of serving cells.
  • the BS and the UE may determine PUSCH 4 to be the reference PUSCH because PUSCH 4 is transmitted on CC4 which has the largest serving cell index.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH on a serving cell with a predefined order among a combination of serving cells indicated by the multi-cell scheduling DCI format.
  • the multi-cell scheduling DCI format indicates a row of the table as stated above, wherein the row defines four co-scheduled serving cells to be CC4, CC2, CC3, and CC1 as shown in FIG. 3; and the PUSCHs on CC4, CC2, and CC3 satisfy conditions (1) and (2) as stated above.
  • the plurality of serving cells (e.g., a combination of serving cells) indicated by the multi-cell scheduling DCI format are CC4, CC2, and CC3 indicated by the multi-cell scheduling DCI format.
  • the pre-defined order may refer to the first serving cell among a combination of serving cells.
  • the BS and the UE may determine PUSCH 4 to be the reference PUSCH because PUSCH 4 is transmitted on CC4 which is the first serving cell among a combination of CC4, CC2, and CC3.
  • the pre-defined order may refer to the last serving cell among a combination of serving cells.
  • the BS and the UE may determine PUSCH 3 to be the reference PUSCH because PUSCH 3 is transmitted on CC3 which is the last serving cell among a combination of CC4, CC2, and CC3.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH with the most time-frequency resources among the plurality of PUSCHs. In such embodiments, the impact on the PUSCH due to multiplexing the HARQ-ACK feedback may be minimal.
  • the BS and the UE may determine PUSCH 4 to be the reference PUSCH because PUSCH 4 has the most time-frequency resources among the 4 PUSCHs.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH with a pre-defined serving cell index among at least one PUSCH of the plurality of PUSCHs.
  • the at least one PUSCH of the plurality of PUSCHs may have the same ending time.
  • the pre-defined serving cell index may be the smallest serving cell index among at least one serving cells on which the at least one PUSCH is transmitted.
  • the pre-defined serving cell index may be the largest serving cell index among at least one serving cells on which the at least one PUSCH is transmitted.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH with a pre-defined serving cell index among at least one PUSCH of the plurality of PUSCHs.
  • the at least one PUSCH of the plurality of PUSCHs may have the same starting time.
  • the pre-defined serving cell index may be the smallest serving cell index among at least one serving cells on which the at least one PUSCH is transmitted.
  • the pre-defined serving cell index may be the largest serving cell index among at least one serving cells on which the at least one PUSCH is transmitted.
  • only one PUSCH of the plurality of PUSCHs may overlap the PUCCH. Then, the BS and the UE may determine the reference PUSCH to be the one PUSCH.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH on a serving cell with a pre-defined serving cell index among the serving cells carrying one or more PUSCHs overlapping the PUCCH.
  • the pre-defined serving cell index may be the smallest serving cell index.
  • the UE and the BS may determine PUSCH 2 to be the reference PUSCH because PUSCH 2 is transmitted on CC2 which has the smallest serving cell index among CC2 and CC4.
  • the pre-defined serving cell index may be the largest serving cell index.
  • the UE and the BS may determine PUSCH 4 to be the reference PUSCH because PUSCH 4 is transmitted on CC4 which has the largest serving cell index among CC2 and CC4.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH which ends latest among the one or more PUSCHs overlapping the PUCCH.
  • the UE and the BS may determine PUSCH 2 to be the reference PUSCH because PUSCH 2 ends latest among PUSCH 2 and PUSCH 4.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH which starts earliest among the one or more PUSCHs overlapping the PUCCH.
  • the UE and the BS may determine PUSCH 4 to be the reference PUSCH because PUSCH 4 starts earliest among PUSCH 2 and PUSCH 4.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH which starts latest among the one or more PUSCHs overlapping the PUCCH.
  • the UE and the BS may determine PUSCH 2 to be the reference PUSCH because PUSCH 2 starts latest among PUSCH 2 and PUSCH 4.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH with the most time-frequency resources among the one or more PUSCHs overlapping the PUCCH.
  • the UE and the BS may determine PUSCH 4 to be the reference PUSCH because PUSCH 4 has more time-frequency resources than PUSCH 2.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH on a serving cell with a pre-defined serving cell index among the serving cell (s) carrying at least one PUSCH of the one or more PUSCHs overlapping the PUCCH.
  • the at least one PUSCH of the plurality of PUSCHs may have the same ending time.
  • the pre-defined serving cell index may be the smallest serving cell index among the serving cell (s) on which the at least one PUSCH is transmitted.
  • the pre-defined serving cell index may be the largest serving cell index among the serving cell (s) on which the at least one PUSCH is transmitted.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH on a serving cell with a pre-defined serving cell index among the serving cell (s) carrying at least one PUSCH of the one or more PUSCHs overlapping the PUCCH.
  • the at least one PUSCH of the plurality of PUSCHs may have the same starting time.
  • the pre-defined serving cell index may be the smallest serving cell index among the serving cell (s) on which the at least one PUSCH is transmitted.
  • the pre-defined serving cell index may be the largest serving cell index among the serving cell (s_on which the at least one PUSCH is transmitted.
  • the BS and the UE may use at least one of the above solutions to determine the reference PUSCH from the plurality of PUSCHs. Then, the UE may transmit the plurality of PUSCHs, wherein the HARQ-ACK feedback is multiplexed on the reference PUSCH. Consequently, the BS may receive the plurality of PUSCHs, wherein the HARQ-ACK feedback is multiplexed on the reference PUSCH.
  • a BS may configure one or more sets of serving cells for multi-cell scheduling via one or more multi-cell scheduling DCI formats (named as DCI format 0_X for UL scheduling or DCI format 1_X for DL scheduling for simplicity) for a UE (e.g., UE 101 as shown in FIG. 1) , wherein a multi-cell scheduling DCI format may schedule one or more serving cells within a set of serving cells of the one or more sets of serving cells.
  • the intersection of the one or more sets of serving cells is null, i.e., a serving cell can only be included in one set of serving cells, or a serving cell included in one set of serving cells cannot be included in another set of serving cells.
  • each set of serving cells of the one or more sets of serving cells may include up to 4 cells, 8 cells, or other number of cells.
  • Each set of serving cells may be associated with a corresponding table configured by RRC signaling or a predefined table.
  • Each row of the corresponding table may define a co-scheduled cell combination (e.g., a set of co-scheduled cells within the corresponding set of serving cells) .
  • a maximum of 4 cells within the corresponding set of serving cells may be defined in each co-scheduled cell combination, i.e., a maximum of 4 cells within a set of serving cells may be scheduled by a multi-cell scheduling DCI format.
  • each set of serving cells may be associated with a search space configuration for monitoring a corresponding multi-cell scheduling DCI format.
  • the search space of a multi-cell scheduling DCI format scheduling a cell combination within a corresponding set of serving cells may be configured on a (single) serving cell of the corresponding set of serving cells.
  • the serving cell on which the search space is configured may be configured by RRC signaling or predefined.
  • the serving cell on which the search space is configured may be the serving cell with the smallest serving cell index within the corresponding set of serving cells, or the serving cell with the largest serving cell index within the corresponding set of serving cells.
  • each set of serving cells may correspond to a DCI size for a corresponding multi-cell scheduling DCI format.
  • the DCI size of a multi-cell scheduling DCI format scheduling a cell combination within a corresponding set of serving cells may be counted on a (single) serving cell of the corresponding set of serving cells (e.g., for DCI size alignment) .
  • the serving cell on which the DCI size is counted may be configured by RRC signaling or predefined.
  • the serving cell on which the DCI size of the multi-cell scheduling DCI format is counted on may be the serving cell on which the search space of the multi-cell scheduling DCI format is configured.
  • the serving cell on which the DCI size is counted may be the serving cell with the smallest serving cell index within the corresponding set of serving cells, or the serving cell with the largest serving cell index within the corresponding set of serving cells.
  • a BD or CCE budget of a multi-cell scheduling DCI format scheduling a cell combination within a corresponding set of serving cells may be counted on a (single) serving cell of the corresponding set of serving cells.
  • the serving cell on which the BD or CCE budget is counted may be configured by RRC signaling or predefined.
  • the serving cell on which the BD or CCE budget of the multi-cell scheduling DCI format is counted on may be the serving cell on which the search space of the multi-cell scheduling DCI format is configured.
  • the serving cell on which the BD or CCE budget of the multi-cell scheduling DCI format is counted may be the serving cell with the smallest serving cell index within the corresponding set of serving cells, or the serving cell with the largest serving cell index within the corresponding set of serving cells.
  • a serving cell on which a DCI size of a multi-cell scheduling DCI format is counted may be the same or different as a serving cell on which a BD or CCE budget of the multi-cell scheduling DCI format is counted.
  • a serving cell on which a DCI size of a multi-cell scheduling DCI format is counted and a serving cell on which a BD or CCE budget of the multi-cell scheduling DCI format is counted may be separately configured or may be configured using the same signaling.
  • each set of serving cells may be configured with a parameter (e.g., denoted as n CI ) for determining CCEs of PDCCH candidates for monitoring a corresponding multi-cell scheduling DCI format.
  • n CI a parameter for determining CCEs of PDCCH candidates for monitoring a corresponding multi-cell scheduling DCI format.
  • different sets of serving cells may be configured with different values of the parameter. Due to different values of the parameter per set of serving cells, the UE may differentiate the scheduled set of serving cells when monitoring CCEs of PDCCH candidates.
  • the following equation may be used for determining CCEs of PDCCH candidates for monitoring a multi-cell scheduling DCI format:
  • the CCE indexes for aggregation level L corresponding to PDCCH candidate of the search space set in slot for an active downlink (DL) bandwidth part (BWP) of a serving cell corresponding to n CI are given by
  • ⁇ N CCE, p is the number of CCEs, numbered from 0 to N CCE, p -1, in CORESET p and, if any, per resource block (RB) set;
  • n RNTI cell-radio network temporary identifier
  • the BS may transmit one or more DCI formats scheduling a plurality of PUSCHs on a plurality of serving cells.
  • Each PUSCH in the plurality of PUSCHs may be scheduled on a corresponding serving cell of the plurality of serving cells.
  • the one or more DCI formats may include at least one multi-cell scheduling DCI format (e.g., DCI format 0_X for UL scheduling or DCI format 1_X for DL scheduling) , each of the at least one multi-cell scheduling DCI format schedules a respective first set of serving cells among the plurality of serving cells, and the respective first set of serving cells is a subset of a corresponding second set of serving cells configured for multi-cell scheduling using a multi-cell scheduling DCI format.
  • the corresponding second set of serving cells may be a set of serving cells within the one or more sets of serving cells configured by the BS as stated above.
  • each of the at least one multi-cell scheduling DCI format may include an indicator indicating a row of a table associated with the corresponding second set of serving cells, and the row may define a set of co-scheduled cells within the corresponding second set of serving cells.
  • the respective first set of serving cells may be the set of co-scheduled cells or a subset of the set of co-scheduled cells.
  • the corresponding second set of serving cells is configured with a parameter (e.g., n CI as stated above) for determining CCEs of PDCCH candidates for monitoring the multi-cell scheduling DCI format.
  • a parameter e.g., n CI as stated above
  • a DCI size of each of the at least one multi-cell scheduling DCI format is counted on a serving cell (e.g., a single serving cell) of the corresponding second set of serving cells.
  • a serving cell e.g., a single serving cell
  • the serving cell of the corresponding second set of serving cells may be configured by RRC signaling.
  • a BD or CCE budget of each of the at least one multi-cell scheduling DCI format is counted on a serving cell (e.g., a single serving cell) of the corresponding second set of serving cells.
  • a serving cell e.g., a single serving cell
  • the serving cell of the corresponding second set of serving cells may be configured by RRC signaling
  • a search space of each of the at least one multi-cell scheduling DCI format is configured on a serving cell (e.g., a single serving cell) of the corresponding second set of serving cells.
  • a serving cell e.g., a single serving cell
  • the serving cell of the corresponding second set of serving cells may be configured by RRC signaling.
  • the one or more DCI formats may also include at least one single-cell scheduling DCI format (e.g., DCI format 0_0, DCI format 0_1, DCI format 0_2, etc. as specified in 3GPP standard documents) , wherein each single-cell scheduling DCI format of the at least one single-cell scheduling DCI format may schedule a PUSCH on a serving cell.
  • the plurality of PUSCHs may include the PUSCH (s) scheduled by the at least one single-cell scheduling DCI format.
  • the UE or the BS may determine that one or more PUSCHs of the plurality of PUSCHs overlap a PUCCH carrying HARQ-ACK feedback for a downlink transmission (e.g., one or more PDSCHs) .
  • the UE may determine a reference PUSCH among the plurality of PUSCHs for multiplexing the HARQ-ACK feedback and not transmit the PUCCH.
  • a DCI format of the one or more DCI formats which schedules the reference PUSCH may include a UL DAI.
  • the DAI may indicate the number of ⁇ serving cell, PDCCH monitoring occasion ⁇ -pair (s) in which PDSCH transmission (s) associated with PDCCH or PDCCH indicating SPS PDSCH release or DCI format 1_1 indicating SCell dormancy is present.
  • a DCI format of the one or more DCI formats may include a beta offset indicator.
  • the beta offset indicator may be applicable for the reference PUSCH for adjusting resources of the HARQ-ACK feedback on the reference PUSCH.
  • the reference PUSCH for multiplexing the HARQ-ACK feedback may satisfy a condition (s) .
  • the reference PUSCH may be a PUSCH actually transmitted (e.g., condition (1) ) .
  • Whether a PUSCH is actually transmitted may be determined as follows: for multiple cells scheduled by a DCI format, if, for a cell from the multiple cells, at least one symbol from a set of symbols where the UE is scheduled PUSCH transmission in the cell is a downlink symbol (e.g., as indicated by a cell common UL/DL configuration such as tdd-UL-DL-ConfigurationCommon as specified in 3GPP standard documents or a UE specific UL/DL configuration such as tdd-UL-DL-ConfigurationDedicated as specified in 3GPP standard documents) , the UE does not transmit the PUSCH in the cell.
  • a cell common UL/DL configuration such as tdd-UL-DL-ConfigurationCommon as specified in 3GPP standard documents
  • a UE specific UL/DL configuration such as tdd-UL-DL-ConfigurationDedicated as specified in 3GPP standard
  • the reference PUSCH for multiplexing the HARQ-ACK feedback may satisfy the UE's processing delay requirement (e.g., condition (2) ) .
  • the plurality of PUSCHs based on which the reference PUSCH is determined may satisfy at least one of condition (1) or condition (2) , and the plurality of serving cells are the serving cells scheduled by the one or more DCI formats on which the plurality of PUSCHs are transmitted.
  • FIG. 4 illustrates a schematic diagram of multiple DCI formats scheduling multiple PUSCHs in accordance with some embodiments of the present disclosure.
  • the BS may transmit 3 DCI formats (e.g., denoted as DCI 1, DCI 2, and DCI 3) scheduling 6 PUSCHs on 6 serving cells to the UE.
  • DCI 1 is a single-cell scheduling DCI scheduling PUSCH 1 on CC1
  • DCI 2 is a multi-cell scheduling DCI scheduling PUSCH 2 on CC2 and PUSCH 3 on CC3
  • DCI 3 is a multi-cell scheduling DCI scheduling PUSCH 4 on CC4, PUSCH 5 on CC5, and PUSCH 6 on CC6.
  • DCI 1, DCI 2, and DCI 3 are transmitted on CC1, CC1, and CC4, respectively.
  • DCI 1, DCI 2, or DCI 3 can be transmitted on a different CC, for example, a CC different from CC1 to CC6.
  • the 6 PUSCHs satisfy conditions (1) and (2) .
  • HARQ-ACK feedback for a PDSCH (s) is to be transmitted in a PUCCH which overlaps PUSCHs 1-6 in a time domain.
  • the following embodiments may provide several solutions for determining the reference PUSCH from the plurality of PUSCHs.
  • the BS and the UE determine the reference PUSCH to be a PUSCH on the PCell or the PSCell of the plurality of serving cells.
  • the HARQ-ACK feedback may be transmitted on a PCell or a PSCell with high reliability.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH which ends latest among the plurality of PUSCHs. In such embodiments, the UE may have sufficient time to multiplex HARQ-ACK feedback on the reference PUSCH. Referring to FIG. 4, in solution #2', the BS or the UE may determine PUSCH 6 to be the reference PUSCH because PUSCH 6 ends latest among the 6 PUSCHs.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH which starts earliest among the plurality of PUSCHs. In such embodiments, the UE may transmit the HARQ-ACK feedback at the earliest time. Referring to FIG. 4, in solution #3', the BS and the UE may determine PUSCH 4 to be the reference PUSCH because PUSCH 4 starts earliest among the 6 PUSCHs.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH which starts latest among the plurality of PUSCHs. In such embodiments, the UE may have sufficient time to multiplex HARQ-ACK feedback on the reference PUSCH. Referring to FIG. 4, in solution #4', the BS and the UE may determine PUSCH 1 to be the reference PUSCH because PUSCH 1 starts latest among the 6 PUSCHs.
  • solution #5' the BS or the UE may determine the reference PUSCH to be a PUSCH with a pre-defined serving cell index among the plurality of serving cells.
  • solution #5 may be used in combination with other solutions for determining a reference PUSCH, for example, one of solutions #2'-4'. For instance, when there are two or more PUSCHs with the same starting time or ending time, solution #5' may be further employed.
  • the pre-defined serving cell index may be the smallest serving cell index among the plurality of serving cells.
  • the BS and the UE may determine PUSCH 1 to be the reference PUSCH because PUSCH 1 is transmitted on CC1 which has the smallest serving cell index.
  • the pre-defined serving cell index may be the largest serving cell index among the plurality of serving cells.
  • the BS and the UE may determine PUSCH 6 to be the reference PUSCH because PUSCH 6 is transmitted on CC6 which has the largest serving cell index.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH with the most time-frequency resources among the plurality of PUSCHs. In such embodiments, the impact on the PUSCH due to multiplexing the HARQ-ACK feedback may be minimal.
  • the BS and the UE may determine PUSCH 6 to be the reference PUSCH because PUSCH 6 has the most time-frequency resources among the 6 PUSCHs.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH with a pre-defined serving cell index among at least one PUSCH of the plurality of PUSCHs.
  • the at least one PUSCH of the plurality of PUSCHs may have the same ending time.
  • the pre-defined serving cell index may be the smallest serving cell index among at least one serving cells on which the at least one PUSCH is transmitted.
  • the pre-defined serving cell index may be the largest serving cell index among at least one serving cells on which the at least one PUSCH is transmitted.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH with a pre-defined serving cell index among at least one PUSCH of the plurality of PUSCHs.
  • the at least one PUSCH of the plurality of PUSCHs may have the same starting time.
  • the pre-defined serving cell index may be the smallest serving cell index among at least one serving cells on which the at least one PUSCH is transmitted.
  • the pre-defined serving cell index may be the largest serving cell index among at least one serving cells on which the at least one PUSCH is transmitted.
  • only one PUSCH of the plurality of PUSCHs may overlap the PUCCH. Then, the BS and the UE may determine the reference PUSCH to be the one PUSCH.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH which ends latest among the one or more PUSCHs of the plurality of PUSCHs. As stated above, the one or more PUSCHs overlap the PUCCH. In such embodiments, the UE may have sufficient time to multiplex HARQ-ACK feedback on the reference PUSCH.
  • the BS and the UE may determine PUSCH 6 to be the reference PUSCH because PUSCH 6 ends latest among the 6 PUSCHs.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH which starts earliest among the one or more PUSCHs of the plurality of PUSCHs. As stated above, the one or more PUSCHs overlap the PUCCH. In such embodiments, the UE may transmit the HARQ-ACK feedback at the earliest time. Referring to FIG. 4, in solution #11', the BS and the UE may determine PUSCH 4 to be the reference PUSCH because PUSCH 4 starts earliest among the 6 PUSCHs.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH which starts latest among the one or more PUSCHs of the plurality of PUSCHs. As stated above, the one or more PUSCHs overlap the PUCCH. In such embodiments, the UE may have sufficient time to multiplex HARQ-ACK feedback on the reference PUSCH. Referring to FIG. 4, in solution #12', the BS and the UE may determine PUSCH 1 to be the reference PUSCH because PUSCH 1 starts latest among the 6 PUSCHs.
  • solution #13' the BS or the UE may determine the reference PUSCH to be a PUSCH on a serving cell with a pre-defined serving cell index among the serving cells carrying the one or more PUSCHs overlapping the PUCCH.
  • solution #13' may be used in combination with other solutions for determining a reference PUSCH, for example, one of solutions #10'-12'. For instance, when there are two or more PUSCHs with the same starting time or ending time, solution #13' may be further employed.
  • the pre-defined serving cell index may be the smallest serving cell index.
  • the BS and the UE may determine PUSCH 1 to be the reference PUSCH because PUSCH 1 is transmitted on CC1 which has the smallest serving cell index.
  • the pre-defined serving cell index may be the largest serving cell index.
  • the BS and the UE may determine PUSCH 6 to be the reference PUSCH because PUSCH 6 is transmitted on CC6 which has the largest serving cell index.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH with the most time-frequency resources among the one or more PUSCHs of the plurality of PUSCHs. As stated above, the one or more PUSCHs overlap with the PUCCH. In such embodiments, the impact on the PUSCH due to multiplexing the HARQ-ACK feedback may be minimal.
  • the BS and the UE may determine PUSCH 6 to be the reference PUSCH because PUSCH 6 has the most time-frequency resources among the 6 PUSCHs.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH on a serving cell with a pre-defined serving cell index among the serving cell (s) carrying at least one PUSCH of the one or more PUSCHs overlapping the PUCCH.
  • the at least one PUSCH of the plurality of PUSCHs may have the same ending time.
  • the pre-defined serving cell index may be the smallest serving cell index among the serving cell (s) on which the at least one PUSCH is transmitted.
  • the BS and the UE may determine PUSCH 1 to be the reference PUSCH because PUSCH 1 is transmitted on CC1 which has the smallest serving cell index among CC1 and CC2.
  • the pre-defined serving cell index may be the largest serving cell index among the serving cell (s) on which the at least one PUSCH is transmitted.
  • the BS and the UE may determine PUSCH 2 to be the reference PUSCH because PUSCH 2 is transmitted on CC2 which has the largest serving cell index among CC1 and CC2.
  • the BS or the UE may determine the reference PUSCH to be a PUSCH on a serving cell with a pre-defined serving cell index among the serving cell (s) carrying at least one PUSCH of the one or more PUSCHs overlapping the PUCCH.
  • the at least one PUSCH of the plurality of PUSCHs may have the same starting time.
  • the pre-defined serving cell index may be the smallest serving cell index among the serving cell (s) on which the at least one PUSCH is transmitted.
  • the pre-defined serving cell index may be the largest serving cell index among the serving cell (s_on which the at least one PUSCH is transmitted.
  • the BS and the UE may use at least one solution of the above solutions to determine the reference PUSCH from the plurality of PUSCHs. Then, the UE may transmit the plurality of PUSCHs, wherein the HARQ-ACK feedback is multiplexed on the reference PUSCH. Consequently, the BS may receive the plurality of PUSCHs, wherein the HARQ-ACK feedback is multiplexed on the reference PUSCH.
  • FIG. 5 is a flow chart illustrating an exemplary method for HARQ-ACK feedback multiplexing on a PUSCH according to some embodiments of the present disclosure.
  • the method illustrated in FIG. 5 may be performed by a UE (e.g., UE 101 as shown in FIG. 1) and a BS (e.g., BS 102 as shown in FIG. 1) .
  • a UE e.g., UE 101 as shown in FIG. 1
  • BS e.g., BS 102 as shown in FIG. 1
  • the method is illustrated in a system level, persons skilled in the art can understand that the method implemented in the UE and the BS can be separately implemented and incorporated in other apparatus with the like functions.
  • the BS may transmit, to the UE, one or more DCI formats scheduling a plurality of PUSCHs on a plurality of serving cells of the UE. Consequently, in step 502, the UE may receive, from the BS, the one or more DCI formats scheduling the plurality of PUSCHs on the plurality of serving cells of the UE.
  • the one or more DCI formats may include a multi-cell scheduling DCI format in Embodiment 1 or include a DCI format (s) in Embodiment 2.
  • the one or more DCI formats may include at least one multi-cell scheduling DCI format, each of the at least one multi-cell scheduling DCI format schedules a respective first set of serving cells among the plurality of serving cells, and the respective first set of serving cells is a subset of a corresponding second set of serving cells configured for multi-cell scheduling using a multi-cell scheduling DCI format.
  • the corresponding second set of serving cells is configured with a parameter (e.g., n CI as stated above) for determining CCEs of PDCCH candidates for monitoring the multi-cell scheduling DCI format.
  • a parameter e.g., n CI as stated above
  • a DCI size of each of the at least one multi-cell scheduling DCI format is counted on a serving cell of the corresponding second set of serving cells.
  • the serving cell of the corresponding second set of serving cells may be configured by RRC signaling.
  • a BD or CCE budget of each of the at least one multi-cell scheduling DCI format is counted on a serving cell of the corresponding second set of serving cells.
  • the serving cell of the corresponding second set of serving cells may be configured by RRC signaling
  • a search space of each of the at least one multi-cell scheduling DCI format is configured on a serving cell of the corresponding second set of serving cells.
  • the serving cell of the corresponding second set of serving cells may be configured by RRC signaling.
  • the BS and the UE may determine that one or more PUSCHs of the plurality of PUSCHs overlap a PUCCH carrying HARQ-ACK feedback for downlink transmission (e.g., one or more PDSCHs) , respectively.
  • a PUCCH carrying HARQ-ACK feedback for downlink transmission e.g., one or more PDSCHs
  • the BS and the UE may determine a reference PUSCH among the plurality of PUSCHs for multiplexing the HARQ-ACK feedback, respectively.
  • the BS and the UE may use the same solution (s) to determine the reference PUSCH among the plurality of PUSCHs.
  • the reference PUSCH may satisfy the UE's processing delay requirement on multiplexing the HARQ-ACK feedback.
  • a DCI format (e.g., a DCI format scheduling the reference PUSCH) of the one or more DCI formats may include a beta offset indicator applicable for the reference PUSCH for adjusting resources of the HARQ-ACK feedback on the reference PUSCH.
  • the UE or the BS may perform at least one of the following operations to determine the reference PUSCH:
  • ⁇ determining the reference PUSCH to be a PUSCH on a PCell or a PSCell of the plurality of serving cells
  • ⁇ determining the reference PUSCH to be a PUSCH which ends latest among the plurality of PUSCHs
  • ⁇ determining the reference PUSCH to be a PUSCH with the smallest serving cell index among the plurality of serving cells
  • ⁇ determining the reference PUSCH to be a PUSCH with the largest serving cell index among the plurality of serving cells
  • ⁇ determining the reference PUSCH to be a PUSCH on a serving cell with a predefined order among a combination of serving cells indicated by a DCI format among the one or more DCI formats;
  • ⁇ determining the reference PUSCH to be a PUSCH with the most time-frequency resources among the plurality of PUSCHs
  • ⁇ determining the reference PUSCH to be a PUSCH with the smallest serving cell index among at least one PUSCH of the plurality of PUSCHs with the same ending time
  • ⁇ determining the reference PUSCH to be a PUSCH with the largest serving cell index among at least one PUSCH of the plurality of PUSCHs with the same ending time;
  • ⁇ determining the reference PUSCH to be a PUSCH with the largest serving cell index among at least one PUSCH of the plurality of PUSCHs with the same starting time.
  • the UE or the BS may perform at least one of the following operations to determine the reference PUSCH:
  • ⁇ determining the reference PUSCH to be a PUSCH with the most time-frequency resources among the one or more PUSCHs
  • ⁇ determining the reference PUSCH to be a PUSCH with a predefined smallest serving cell index among at least one PUSCH of the one or more PUSCHs with the same ending time;
  • ⁇ determining the reference PUSCH to be a PUSCH with a predefined largest serving cell index among at least one PUSCH of the one or more PUSCHs with the same starting time.
  • the UE may transmit the plurality of PUSCHs to the BS, wherein the HARQ-ACK feedback is multiplexed on the reference PUSCH. Consequently, in step 507, the BS may receive the plurality of PUSCHs from the UE, wherein the HARQ-ACK feedback is multiplexed on the reference PUSCH.
  • FIG. 6 illustrates a simplified block diagram of an exemplary apparatus for HARQ-ACK feedback multiplexing on a PUSCH according to some embodiments of the present disclosure.
  • the apparatus 600 may include at least one processor 606 and at least one transceiver 602 coupled to the processor 606.
  • the apparatus 600 may be a UE or a BS.
  • the transceiver 602 may be divided into two devices, such as a receiving circuitry and a transmitting circuitry.
  • the apparatus 600 may further include an input device, a memory, and/or other components.
  • the apparatus 600 may be a UE.
  • the transceiver 602 and the processor 606 may interact with each other so as to perform the operations with respect to the UE described in FIGS. 1-5.
  • the apparatus 600 may be a BS.
  • the transceiver 602 and the processor 606 may interact with each other so as to perform the operations with respect to the BS described in FIGS. 1-5.
  • the apparatus 600 may further include at least one non-transitory computer-readable medium.
  • the non-transitory computer-readable medium may have stored thereon computer-executable instructions to cause the processor 606 to implement the method with respect to the UE as described above.
  • the computer-executable instructions when executed, cause the processor 606 interacting with transceiver 602 to perform the operations with respect to the UE described in FIGS. 1-5.
  • the non-transitory computer-readable medium may have stored thereon computer-executable instructions to cause the processor 606 to implement the method with respect to the BS as described above.
  • the computer-executable instructions when executed, cause the processor 606 interacting with transceiver 602 to perform the operations with respect to the BS described in FIGS. 1-5.
  • a software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
  • the operations or steps of a method may reside as one or any combination or set of codes and/or instructions on a non-transitory computer-readable medium, which may be incorporated into a computer program product.
  • the terms “includes, “ “including, “ or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
  • An element proceeded by “a, “ “an, “ or the like does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.
  • the term “another” is defined as at least a second or more.
  • the term “having” and the like, as used herein, are defined as "including.
  • Expressions such as “A and/or B” or “at least one of A and B” may include any and all combinations of words enumerated along with the expression.
  • the expression “A and/or B” or “at least one of A and B” may include A, B, or both A and B.
  • the wording "the first, " “the second” or the like is only used to clearly illustrate the embodiments of the present disclosure, but is not used to limit the substance of the present disclosure.

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

Abstract

Des modes de réalisation de la présente divulgation concernent des procédés et des appareils pour un multiplexage de rétroaction d'accusé de réception de demande de répétition automatique hybride (HARQ-ACK) sur un canal partagé de liaison montante physique (PUSCH) pour une agrégation de porteuses (CA). Selon certains modes de réalisation de la divulgation, un équipement utilisateur (UE) peut comprendre : un émetteur-récepteur configuré pour recevoir un ou plusieurs formats d'informations de commande de liaison descendante (DCI) planifiant une pluralité de PUSCH sur une pluralité de cellules de desserte de l'UE ; un processeur couplé à l'émetteur-récepteur et configuré pour : déterminer qu'un ou plusieurs PUSCH de la pluralité de PUSCH chevauchent un canal de commande de liaison montante physique (PUCCH) portant une rétroaction HARQ-ACK pour une transmission de liaison descendante ; et déterminer un PUSCH de référence parmi la pluralité de PUSCH pour multiplexer la rétroaction HARQ-ACK ; et l'émetteur-récepteur étant en outre configuré pour transmettre la pluralité de PUSCH, la rétroaction HARQ-ACK étant multiplexée sur le PUSCH de référence.
PCT/CN2022/130020 2022-11-04 2022-11-04 Procédés et appareils de multiplexage de rétroaction harq-ack sur un pusch pour agrégation de porteuses WO2024082350A1 (fr)

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CN102859923A (zh) * 2010-03-22 2013-01-02 三星电子株式会社 在物理数据信道中复用来自用户设备的控制和数据信息
CN107734680A (zh) * 2016-08-12 2018-02-23 中兴通讯股份有限公司 一种传输信息的方法及装置、接收信息的方法及装置
US20210409182A1 (en) * 2018-09-27 2021-12-30 Lg Electronics Inc. Method for transmitting harq-ack information, and communication device
WO2022087474A1 (fr) * 2020-10-23 2022-04-28 Intel Corporation Hiérarchisation d'équipements intra-utilisateur pour gérer un chevauchement de canaux de commande montants et de données de liaison montante

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CN102859923A (zh) * 2010-03-22 2013-01-02 三星电子株式会社 在物理数据信道中复用来自用户设备的控制和数据信息
CN107734680A (zh) * 2016-08-12 2018-02-23 中兴通讯股份有限公司 一种传输信息的方法及装置、接收信息的方法及装置
US20210409182A1 (en) * 2018-09-27 2021-12-30 Lg Electronics Inc. Method for transmitting harq-ack information, and communication device
WO2022087474A1 (fr) * 2020-10-23 2022-04-28 Intel Corporation Hiérarchisation d'équipements intra-utilisateur pour gérer un chevauchement de canaux de commande montants et de données de liaison montante

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