WO2021161060A1 - Procédé d'accusé de réception harq-ack pour des données de liaison descendante reçues sur une bande sans licence dans un réseau d'accès radio - Google Patents

Procédé d'accusé de réception harq-ack pour des données de liaison descendante reçues sur une bande sans licence dans un réseau d'accès radio Download PDF

Info

Publication number
WO2021161060A1
WO2021161060A1 PCT/IB2020/000451 IB2020000451W WO2021161060A1 WO 2021161060 A1 WO2021161060 A1 WO 2021161060A1 IB 2020000451 W IB2020000451 W IB 2020000451W WO 2021161060 A1 WO2021161060 A1 WO 2021161060A1
Authority
WO
WIPO (PCT)
Prior art keywords
dai
group
pdsch
transmission type
pdsch group
Prior art date
Application number
PCT/IB2020/000451
Other languages
English (en)
Inventor
Hao Lin
Original Assignee
Orope France Sarl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Orope France Sarl filed Critical Orope France Sarl
Priority to PCT/IB2020/000451 priority Critical patent/WO2021161060A1/fr
Publication of WO2021161060A1 publication Critical patent/WO2021161060A1/fr

Links

Classifications

    • 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
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1896—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • 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
    • H04L5/0094—Indication of how sub-channels of the path are allocated

Definitions

  • the present disclosure relates to the field of telecommunications, and in particular to a method of HARQ-ACK acknowledgment for downlink data received on an unlicensed band in a radio access network, and to network elements and user equipment employing such methods.
  • a radio access network is part of a telecommunications system.
  • 3GPP 3rd Generation Partnership Project
  • 5G fifth generation
  • 5G NR New Radio
  • RAT radio access technology
  • downlink and uplink transmissions are scheduled by the base station.
  • downlink means data transmitted from a base station (BS) to a user equipment (UE) and uplink means data transmitted from a user equipment to a base station.
  • Downlink data may be transmitted over a channel such as a physical downlink shared channel (PDSCH).
  • PDSCH physical downlink shared channel
  • a base station Prior to transmitting the downlink data, a base station transmits downlink control information (DCI) relating to the downlink data transmission.
  • the DCI may be transmitted over a channel such as a physical downlink control channel (PDCCH).
  • PDCH physical downlink control channel
  • Downlink data transmissions may be dynamically scheduled by the base station.
  • DCI is transmitted by the base station for each dynamically scheduled downlink data transmission.
  • This DCI indicates the resources in time and frequency for the transmission of the downlink data to enable the UE to identify and receive the downlink data.
  • the DCI also indicates a slot for a corresponding acknowledgment transmission from the UE. Thus for each DCI there is a corresponding acknowledgement from the UE. If the base station does not receive an acknowledgement it presumes the UE did not correctly receive the downlink data and schedules a retransmission of the downlink data.
  • a 5G radio access network may also utilise unlicensed spectrum, referred to as a new radio-unlicensed (5G NR-U) radio access network.
  • Unlicensed spectrum is a shared spectrum that may be used by other telecommunications networks.
  • regulatory requirements have been specified which must be met by any communication systems using the unlicensed spectrum. For example, one such regulatory requirement is that a communication device (for instance a user equipment) must follow a “Listen Before Talk (LBT)” procedure. Listen Before Talk means that the communication device must listen to sense whether the channel is already in use before transmitting any signal on the channel.
  • LBT Listen Before Talk
  • the communication device may transmit on the channel only when the channel sensing shows that the channel is not in use.
  • the communication device may not transmit on the channel if the channel sensing shows the channel is in use.
  • downlink control information transmitted by the base station includes the following information fields, defined in 3GPP standards:
  • the field ‘Group ID’ or ‘Group’ indicates a group identifier identifying the group to which the associated downlink data transmission belongs. Typically, two groups are supported, a first group and a second group.
  • the field T-DAI’ represents a total number of downlink data transmissions in the group, as scheduled by the base station at the time of the current DCI.
  • the field ‘C-DAI’ represents a sequence number of the associated downlink data transmission in the total number of downlink data transmissions scheduled, T-DAI.
  • a 5G radio access network may support two type of downlink data transmissions, referred to as transport block based, or TB-based, transmissions and code block group based, or CBG-based, transmissions.
  • CBG-based transmission splits a transport block of downlink data into parts, where each CBG-based transmission sends one of the parts.
  • each cell is configured by the 5G radio access network for either TB-based transmissions or CBG-based transmissions.
  • a user equipment can be configured to receive downlink data transmissions via two or more cells, some of which may be configured for TB- based transmissions and others of which may be configured for CBG-based transmissions. If the user equipment is also configured to use group-based acknowledgement feedback, such as HARQ-ACK feedback, a situation may arise where the user equipment does not know how to construct the acknowledgement feedback codebook for the non-scheduled group to transmit to the base station.
  • group-based acknowledgement feedback such as HARQ-ACK feedback
  • a first aspect of the present disclosure resides in a method of transmission, comprising: receiving, by a user equipment, UE, downlink control information, DCI, wherein the DCI indicates the UE to feedback HARQ-ACK of a first PDSCH group and a second PDSCH group; and transmitting, by the UE, HARQ-ACK feedback of the first PDSCH group and the second PDSCH group based on the DCI.
  • a second aspect of the present disclosure resides in a method of transmission, comprising: transmitting, by a base station, downlink control information, DCI, wherein the DCI indicates a user equipment, UE, to feedback HARQ- ACK of a first PDSCH group and a second PDSCH group; and receiving, by the base station from the UE, HARQ-ACK feedback of the first PDSCH group and the second PDSCH group based on the DCI.
  • a third aspect of the present disclosure resides in a user equipment comprising processor and a memory, the memory comprising program instructions for causing the processor to perform the steps of a method according to any of claims 1 to 24.
  • a fourth aspect of the present disclosure resides in a network element comprising processor and a memory, the memory comprising program instructions for causing the processor to perform the steps of a method comprising: transmitting, to a user equipment, UE, downlink control information, DCI, wherein the DCI indicates the UE to feedback HARQ-ACK of a first PDSCH group and a second PDSCH group; and receiving, from the UE, HARQ-ACK feedback of the first group and the second group based on the DCI.
  • a fifth aspect of the present disclosure resides in a computer readable medium comprising program instructions for causing a user equipment to perform the steps of a method according to any of claims 1 to 24.
  • a sixth aspect of the present disclosure resides in a computer readable medium comprising program instructions for causing a network element to perform perform the steps of a method comprising: transmitting, to a user equipment, UE, downlink control information, DCI, wherein the DCI indicates the UE to feedback HARQ-ACK of a first PDSCH group and a second PDSCH group; and receiving, from the UE, HARQ-ACK feedback of the first group and the second group based on the DCI.
  • Fig. 1 to 6 show illustrative examples of downlink data receptions by a user equipment and acknowledgement codebook transmissions according to embodiments of the present disclosure.
  • Figs. 7 and 8 show methods of transmission according to embodiments of the present disclosure.
  • Embodiments of the present disclosure relate to a method of transmission comprising receiving 102, by a user equipment, UE, downlink control information, DCI, wherein the DCI indicates the UE to feedback HARQ-ACK of a first PDSCH group and a second PDSCH group. As shown in Fig. 7, the method further comprises transmitting 104, by the UE, HARQ- ACK feedback of the first PDSCH group and the second PDSCH group based on the DCI.
  • Embodiments of the present disclosure also relate to user equipment and network elements employing such a method.
  • the mobile telecommunication system may be a 5G mobile network and the radio access network may be an unlicensed spectrum compliant with 5G NR-U (New Radio in unlicensed spectrum) or in licensed spectrum compliant with 5G NR as defined by 3GPP standards.
  • the UE transmits the HARQ-ACK feedback to a network element such as a base station or gNB.
  • the DCI indicates the user equipment shall report acknowledgement feedback for the first PDSCH group and for the second PDSCH group, for example by providing a Trigger bit value of 1.
  • the first group may be referred to as the scheduled group and the second group may be referred to as the non-scheduled group, since the DCI scheduled a downlink data transmission for the first group but not for the second group.
  • there may be a total of N+M cells in the cell group which may be for instance a PUCCH cell group.
  • the N cells may be configured for CBG-based downlink transmission and the M cells may be configured for TB-based downlink transmission.
  • a UE may be provided a higher layer parameter PDSCH-CodeBlockGroupTransmission for the N serving cells and may not be provided a higher layer parameter PDSCH-CodeBlockGroupTransmission for the M serving cells.
  • the DCI includes an information field which includes a first field and a second field, the first field indicating the first PDSCH group and the second field indicating the second PDSCH group.
  • the first field comprises a downlink assignment index, DAI, of the first PDSCH group.
  • the first field comprises a counter downlink assignment index, C-DAI, and a total downlink assignment index, T-DAI, of the first PDSCH group.
  • the second field is used to indicate the DAI of the second PDSCH group.
  • the second field may indicate the DAI of a first transmission type of the second PDSCH group.
  • the UE may determine the DAI of a second transmission type of the second PDSCH group.
  • the UE determines the DAI of the second transmission type of the second PDSCH group as the DAI indicated in the last received DCI that scheduled the second transmission type of the second PDSCH group.
  • the second field indicates the DAI of the first transmission type and the second transmission type of the second PDSCH group.
  • the UE determines the number of the first transmission type of the second PDSCH group based on the DAI; and determines the number of the second transmission type of the second PDSCH group based on the DAI.
  • the UE determines the DAI based on the greater of a DAI included in the last received DCI that scheduled the first transmission type and a DAI included in the last received DCI that scheduled the second transmission type of the second PDSCH group.
  • the second field indicates the sum of the DAI of the first transmission type and the DAI of the second transmission type of the second PDSCH group.
  • the UE determines the DAI of the second transmission type by the difference, or difference with modulo 4 operation, between the determined DAI of the first transmission type and the second field.
  • the DAI of the first transmission type is the indicated DAI in the last received DAI that scheduled the first transmission type of the second group.
  • the second field indicates the DAI of the first transmission type and the second transmission type of the second PDSCH group, respectively.
  • the second field indicates the DAI of the first transmission type and a sum of the DAI of the first and second transmission types of the second PDSCH group.
  • the first transmission type is transport block based, TB-based, PDSCH transmission and the second transmission type is coded block group based, CBG-based, PDSCH transmission.
  • the first transmission type is a coded block group based, CBG-based, PDSCH transmission and the second transmission type is a transport block based, TB-based, PDSCH transmission.
  • the DAI of the second PDSCH group is the total DAI, T-DAI.
  • the information field has 6 bits, where the first field has 4 bits, the second field has 2 bits. In other embodiments, the information field has 8 bits, where the first field has 4 bits, the second field has 4 bits.
  • the UE transmits, on an uplink channel, the HARQ-ACK feedback to a network element such as a base station or a gNB.
  • a network element such as a base station or a gNB.
  • the network element comprises a processor and a memory, the memory comprising program instructions for causing the processor to perform the steps of a method comprising: transmitting 202, to a user equipment, UE, downlink control information, DCI, wherein the DCI indicates the UE to feedback HARQ-ACK of a first PDSCH group and a second PDSCH group; and receiving 204, from the UE, HARQ-ACK feedback of the first group and the second group based on the DCI.
  • some embodiments related to a method of transmission comprising: transmitting 202, by a base station, downlink control information, DCI, wherein the DCI indicates a user equipment, UE, to feedback HARQ- ACK of a first PDSCH group and a second PDSCH group; and receiving 204, by the base station from the UE, HARQ-ACK feedback of the first PDSCH group and the second PDSCH group based on the DCI.
  • FIGS 1 to 6 show various illustrative examples to aid understanding the present disclosure.
  • the illustrative examples will be described in case where a user equipment, UE, receives downlink data on a downlink channel, and where the downlink channel is a PDSCH and the uplink channel is a PUCCH.
  • the notation PDSCH1 is used to denote the first downlink data transmission on a PDSCH
  • PDSCH2 is used to denote the second downlink data transmission on a PDSCH, and so on.
  • the UE receives downlink data via three cells that are configured in a PUCCH cell group. The three cells are labelled cell 1 , cell 2 and cell 3.
  • Cell 1 is configured for CBG-based transmissions while cells 2 and 3 are configured for TB-based transmissions. While not explicitly mentioned in each example for brevity, it will be understood that the UE transmits the HARQ- ACK codebook to a network element such as a base station or gNB.
  • a network element such as a base station or gNB.
  • References in the examples to parameters that are configured by higher layers may be configured by, for example, radio resource configuration, RRC, signalling from the mobile network.
  • RRC radio resource configuration
  • the illustrative examples are applicable under certain configurations conditions of the radio access network, such as when harq-ACK-SpatialBundlingPUCCH spatialbundling is not provided. [0046] Example 1
  • the UE receives DCI in the form of DCI format 1_1 , which is configured to include an information field called downlink assignment index, Vj3 ⁇ 4i , which further comprises two fields, i.e. I ⁇ -DAI&T-DAI ancl
  • ⁇ T-DAI ⁇ -DAI&T-DAI contains 4 bits representing counter downlink assignment index, C-DAI, and total downlink assignment index, T-DAI, of the scheduled PDSCH group, respectively. If the scheduled PDSCH is a TB- based PDSCH transmission, I ⁇ -DAI&T-DAI represents the C-DAI and T-DAI of the TB-based sub-codebook of the scheduled group. On the other hand, if the scheduled PDSCH is a CBG-based PDSCH transmission, ⁇ -DAI&T-DAI represents the C-DAI and T-DAI of the CBG-based sub-codebook of the scheduled group.
  • n3 ⁇ 4 AI contains 2 bits representing the T-DAI of the TB- based PDSCH transmissions of the non-scheduled PDSCH group.
  • the group 0 is the non-scheduled PDSCH group and DCI triggers feedback of HARQ- ACK for both group 0 and group 1.
  • UE determines the T-DAI of the TB-based PDSCH transmission of group 0 directly from the field V3 ⁇ 4 AI from DCI information field V DAI .
  • the UE determines a value for K1 from the last received DCI that scheduled TB- based PDSCH.
  • the UE may determine K1 as the value of T-DAI contained in the last received DCI that scheduled TB-based PDSCH [0050]
  • UE determines the T- DAI of the CBG-based transmission of group 0 from the indicated T-DAI in the latest received DCI that scheduled a CBG-based transmission of group 0 (in our example, the indicated T-DAI is the DCI that schedules PDSCH1).
  • K2 is the UE determined T-DAI which corresponds to the number of the CBG-based PDSCH received by the UE in the non-scheduled PDSCH group and G is the maximum number of CBG per TB configured by higher layer.
  • the UE puts the Ack/Nack (AN hereafter) bits of the K1 received TB-based PDSCFIs (K1 * m bits) and S1- K1 * m NACK pending bits.
  • UE puts the K2 * m * G AN bits of the received K2 CBG-based PDSCFIs.
  • the UE understands that the TB-based sub-codebook of GO has a size of 2 bits and the Ack/Nack of the PDSCFI2 is placed in the first bit.
  • the UE receives a DCI scheduling PDSCH4 for group 1 (G1) and triggers acknowledgement by the UE for G1 and GO at the same time.
  • the UE understands that for group G1 the TB-based sub-codebook of G1 has a size of 1 bit, which is the Ack/Nack of PDSCH4.
  • the overall HARQ-ACK codebook determined by the UE is as shown in Fig.1 , consisting of the group GO codebook and group G1 codebook.
  • the GO codebook is further composed of TB-based sub-codebook and CBG-based sub-codebook.
  • Example 2 the UE receives DCI in the form of DCI format 1_1 , which is configured to include an information field V ] 3 ⁇ 4i which further comprises two fields, i.e. contains 4 bits representing C-DAI and T-DAI of the scheduled PDSCFI group, respectively. If the scheduled PDSCFI is a TB-based PDSCFI transmission, represents the C-DAI and T-DAI of the TB-based sub-codebook of the scheduled group. On the other hand, if the scheduled PDSCFI is a CBG-based PDSCFI transmission, I ⁇ -DAI&T-DAI represents the C-DAI and T- DAI of the CBG-based sub-codebook of the scheduled group.
  • V3 ⁇ 4 2 AI contains 2 bits representing the T-DAI of the CBG-based PDSCFI transmissions of the non-scheduled PDSCFI group.
  • the group 0 is the non-scheduled PDSCFI group and DCI triggers feedback of FIARQ- ACK for both group 0 and group 1.
  • the UE determines the T-DAI of the CBG-based PDSCFI transmission of group 0 directly from the field V3 ⁇ 4 2 AI from DCI information field V DAI .
  • G is the maximum number of CBG per TB configured by higher layer.
  • UE puts K2 * m * G Ack/Nack bits of the K2 received CBG- based PDSCHs and appends with S2-K2 * m * G NACK bits.
  • UE puts the K1 * m Ack/Nack bits.
  • the UE receives a DCI at cell 1 which contains (C-DAI,
  • T-DAI T-DAI
  • the overall HARQ-ACK codebook determined by the UE and transmitted to the network element, such as a base station or gNB, is as shown in Fig.2.
  • DCI 1_1 is configured to include an information field which further comprises two fields, i.e. contains 4 bits representing C-DAI and T-DAI of the scheduled PDSCH group, respectively.
  • I ⁇ -DAI&T-DAI represents the C-DAI and T-DAI of the TB-based sub-codebook of the scheduled group.
  • I ⁇ -DAI&T-DAI represents the C- DAI and T-DAI of the CBG-based sub-codebook of the scheduled group. contains 2 bits representing the T-DAI for both CBG-based and
  • group 0 is the non-scheduled PDSCH group and DCI triggers feedback of HARQ-ACK for both group 0 and group 1.
  • group 0 the UE determines the T-DAI of the CBG-based PDSCH transmission of group 0 directly from the field V3 ⁇ 4 AI from DCI information field Vj ⁇ j.
  • the UE determines the T-DAI of the TB-based PDSCH transmission of group 0 also from the field V3 ⁇ 4 AI from DCI information field .
  • the UE puts K2 * m * G Ack/Nack bits of the K2 received CBG- based PDSCHs and appends with S2-K2 * m * G NACK bits.
  • the UE puts the K1 * m AN bits and appends with S1-K1 * m NACK pending bits.
  • the non- scheduled group is GO and in this example the DAI is the total DAI for both TB-based and CBG-based sub-codebooks in GO.
  • the HARQ-ACK codebook thus determined by the UE and transmitted to the network element, such as the base station or gNB, is shown in Fig. 3. [00761 Example 4
  • DCI 1_1 is configured to include an information field ⁇ DAI which further comprises two fields, i.e. > 3 ⁇ 4>AI&T-DAI contains 4 bits representing C-DAI and T-DAI of the scheduled PDSCH group, respectively.
  • I ⁇ -DAI&T-DAI represents the C-DAI and T-DAI of the TB-based sub-codebook of the scheduled group.
  • I ⁇ -DAI&T-DAI represents the C- DAI and T-DAI of the CBG-based sub-codebook of the scheduled group.
  • V3 ⁇ 4 2 AI contains 2 bits representing the T-DAI for both CBG-based and TB-based PDSCH transmissions of the non-scheduled PDSCH group.
  • the group 0 is the non-scheduled PDSCH group and DCI triggers feedback of HARQ- ACK for both group 0 and group 1.
  • the UE determines the T-DAI of the CBG-based PDSCH transmission of group 0 directly from the field V3 ⁇ 4 2 AI from DCI information field V DAI
  • the UE determines the T-DAI of the TB-based PDSCH transmission of group 0 also from the field V3 ⁇ 4 AI from DCI information field f 'DAi -
  • S2 the CBG-based sub-codebook size
  • UE puts K2 * m * G Ack/Nack bits of the K2 received CBG- based PDSCHs and appends with S2-K2 * m * G NACK bits.
  • UE puts the K1 * m AN bits and appends with S1- K1 * m NACK pending bits.
  • the HARQ-ACK codebook thus determined by the UE and transmitted to the network element, such as the base station or gNB, is shown in Fig. 4.
  • DCI 1_1 is configured to include two DCI fields of Vj3 ⁇ 4i, i.e. bits representing C-DAI and T-DAI of the scheduled PDSCH group, respectively.
  • I ⁇ -DAI&T-DAI represents the C- DAI and T-DAI of the TB-based sub-codebook of the scheduled group.
  • ⁇ -DAI&T-DAI represents the C-DAI and T-DAI of the CBG-based sub ⁇ codebook of the scheduled group.
  • UE puts K2 * m * G Ack/Nack bits of the K2 received CBG- based PDSCHs and appends with S2-K2 * m * G NACK bits.
  • UE puts the K1 * m AN bits and appends with S1- K1 * m NACK pending bits.
  • the HARQ-ACK codebook thus determined by the UE and transmitted to the network element, such as the base station or gNB, is shown in Fig. 5.
  • the UE receives DCI in the form of DCI format 1 _ 1 , which is configured to include an information field called downlink assignment index, t'D Ai > which further comprises two fields, i.e. ⁇ -DAI&T-DAI contains 4 bits in which 2 bits ( I ⁇ -DAI ) represent counter downlink assignment index, C-DAI, and 2 other bits represent total downlink assignment index, T-DAI, of the scheduled PDSCH group, respectively. If the scheduled PDSCH is TB-based PDSCH transmission, ⁇ C-DAI&T-DAI represents the C-DAI and T-DAI of the TB-based sub-codebook of the scheduled group. On the other hand, if the scheduled PDSCH is CBG- based PDSCH transmission, I ⁇ -DAI&T-DAI represents the C-DAI and T-DAI of the CBG-based sub-codebook of the scheduled group.
  • V3 ⁇ 4 2 AI contains 4 bits, in which 2 bits ) represent T-DAI of the TB-based and CBG-based PDSCH transmissions of the non-scheduled PDSCH group and another 2 bits (n3 ⁇ 4 A TM ) represent T-DAI of the TB-based transmissions of the non-scheduled PDSCH group.
  • the group 0 is the non-scheduled PDSCH group and DCI triggers feedback of HARQ- ACK for both group 0 and group 1.
  • the UE determines the T-DAI of the TB-based PDSCH transmission of group 0 directly from the field V T-DA TM from D( - :l field ⁇ DAI ’2 ⁇
  • the UE determines the T-DAI of the CBG-based PDSCH transmission of group 0 also from the difference of VT-DATM and V T-DAI B+cbg ⁇
  • L(.) is the binary to decimal convert function, e.
  • UE puts K2 * m * G Ack/Nack bits of the K2 received CBG- based PDSCHs and appends with S2-K2 * m * G NACK bits.
  • UE puts the K1 * m AN bits and appends with S1 - K1 * m NACK pending bits.
  • the HARQ-ACK codebook thus determined by the UE and transmitted to the network element, such as the base station or gNB, is shown in Fig. 6.
  • the UE receives DCI in the form of DCI format 1 _ 1 , which is configured to include an information field called downlink assignment index, V' DAI , which further comprises two fields, i.e. and n3 ⁇ 4 2 AI .
  • V' DAI downlink assignment index
  • ⁇ c— ⁇ lA ⁇ &t— DAI contains 4 bits in which 2 bits ( C D _ L QAI ) represent counter downlink assignment index, C-DAI, and 2 other bits represent (n3 ⁇ 4 AI ) total downlink assignment index, T-DAI, of the scheduled PDSCH group, respectively.
  • ⁇ c— Ai&T— DAI represents the C-DAI and T-DAI of the TB-based sub-codebook of the scheduled group.
  • V°_ L DAI&T-DAI represents the C-DAI and T- DAI of the CBG-based sub-codebook of the scheduled group.
  • V3 ⁇ 4 2 AI contains 2 bits representing the total transmitted PDSCHs for CBG-based and TB-based of the non-scheduled PDSCH group.
  • the group 0 is the non-scheduled PDSCH group and DCI triggers feedback of HARQ- ACK for both group 0 and group 1.
  • the UE determines the T-DAI of the CBG-based PDSCH transmission of group 0 from the indicated T-DAI in the latest received DCI that scheduled CBG-based PDSCH transmission.
  • the UE determines the T-DAI of the TB-based PDSCH transmission of group 0 from the difference of T-DAI of CBG-based transmission and V3 ⁇ 4 AI , i.e.
  • T-DAI of the total transmissions from DCI field V OM
  • S2 (S-S1) * G
  • K2 is the number of the CBG-based PDSCH received by the UE in the non-scheduled PDSCH group
  • G is the maximum number of CBG per TB configured by higher layer.
  • UE puts K2 * m * G Ack/Nack bits of the K2 received CBG- based PDSCHs and appends with S2-K2 * m * G NACK bits.
  • Embodiments of the present disclosure also relate to a user equipment comprising a processor and a memory, the memory comprising program instructions for causing the processor to perform the steps of the above methods.
  • Embodiments of the present disclosure also relate to a network element comprising a processor and a memory, the memory comprising program instructions for causing the processor to perform the steps of the above methods.
  • Embodiments of the present disclosure also relate to a computer- readable medium comprising program instructions for causing a user equipment or network element to perform the above method.
  • the computer- readable medium may be a non-transitory medium.
  • the mobile telecommunication system is a 5G mobile network comprising a 5G NR-U (New Radio in unlicensed spectrum) access network.
  • 5G NR-U New Radio in unlicensed spectrum
  • the present disclosure can be applied to other mobile networks, in particular to mobile network of any further generation cellular network technology (6G, etc.).
  • a further embodiment is a computer program product comprising a computer readable storage medium having computer readable program code embodied therein, the computer readable program code being configured to implement one of the above methods when being loaded on a computer, a processor, or a programmable hardware component.
  • the computer readable storage medium is non-transitory.
  • program storage devices e.g., digital data storage media, which are machine or computer readable and encode machine-executable or computer-executable programs of instructions where said instructions perform some or all of the steps of methods described herein.
  • the program storage devices may be, e.g., digital memories, magnetic storage media such as magnetic disks and magnetic tapes, hard drives, or optically readable digital data storage media.
  • the embodiments are also intended to cover computers programmed to perform said steps of methods described herein or (field) programmable logic arrays ((F)PLAs) or (field) programmable gate arrays ((F)PGAs), programmed to perform said steps of the above-described methods.
  • F programmable logic arrays
  • F programmable gate arrays
  • any block diagrams herein represent conceptual views of illustrative circuitry embodying the principles of the invention.
  • any flow charts, flow diagrams, state transition diagrams, pseudo code, and the like represent various processes which may be substantially represented in computer readable medium and so executed by a computer or processor, whether or not such computer or processor is explicitly shown.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

Un équipement utilisateur, UE, reçoit des informations de commande de liaison descendante, DCI, en provenance d'un élément de réseau. Les DCI indiquent à l'UE de renvoyer un HARQ-ACK d'un groupe de PDSCH programmé et d'un groupe de PDSCH non programmé. L'UE détermine un retour HARQ-ACK du groupe PDSCH programmé et du groupe PDSCH non programmé sur la base des DCI.
PCT/IB2020/000451 2020-02-14 2020-02-14 Procédé d'accusé de réception harq-ack pour des données de liaison descendante reçues sur une bande sans licence dans un réseau d'accès radio WO2021161060A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IB2020/000451 WO2021161060A1 (fr) 2020-02-14 2020-02-14 Procédé d'accusé de réception harq-ack pour des données de liaison descendante reçues sur une bande sans licence dans un réseau d'accès radio

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2020/000451 WO2021161060A1 (fr) 2020-02-14 2020-02-14 Procédé d'accusé de réception harq-ack pour des données de liaison descendante reçues sur une bande sans licence dans un réseau d'accès radio

Publications (1)

Publication Number Publication Date
WO2021161060A1 true WO2021161060A1 (fr) 2021-08-19

Family

ID=71527824

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2020/000451 WO2021161060A1 (fr) 2020-02-14 2020-02-14 Procédé d'accusé de réception harq-ack pour des données de liaison descendante reçues sur une bande sans licence dans un réseau d'accès radio

Country Status (1)

Country Link
WO (1) WO2021161060A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023115370A1 (fr) * 2021-12-22 2023-06-29 Zte Corporation Procédés et systèmes d'ordonnancement multicanal sur une ou plusieurs cellules

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
INTEL CORPORATION: "Enhancements to HARQ for NR-unlicensed", vol. RAN WG1, no. Reno, USA; 20190513 - 20190517, 13 May 2019 (2019-05-13), XP051728238, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Meetings%5F3GPP%5FSYNC/RAN1/Docs/R1%2D1906787%2Ezip> [retrieved on 20190513] *
MEDIATEK INC: "Enhancements to HARQ and scheduling for NR-U operation", vol. RAN WG1, no. Reno, USA; 20191118 - 20191122, 9 November 2019 (2019-11-09), XP051823183, Retrieved from the Internet <URL:https://ftp.3gpp.org/tsg_ran/WG1_RL1/TSGR1_99/Docs/R1-1912090.zip R1-1912090_MTK_Enhancements to HARQ for NR-U operation_final.docx> [retrieved on 20191109] *
MEDIATEK INC: "Enhancements to HARQ for NR-U operation", vol. RAN WG1, no. Reno, USA; 20190513 - 20190517, 13 May 2019 (2019-05-13), XP051727996, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Meetings%5F3GPP%5FSYNC/RAN1/Docs/R1%2D1906545%2Ezip> [retrieved on 20190513] *
QUALCOMM INCORPORATED: "Enhancements to Scheduling and HARQ operation for NR-U", vol. RAN WG1, no. Chongqing, CN; 20191014 - 20191020, 5 October 2019 (2019-10-05), XP051808838, Retrieved from the Internet <URL:https://ftp.3gpp.org/tsg_ran/WG1_RL1/TSGR1_98b/Docs/R1-1911099.zip R1-1911099 7.2.2.2.3 Enhancements to Scheduling and HARQ Operation for NR-U.docx> [retrieved on 20191005] *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023115370A1 (fr) * 2021-12-22 2023-06-29 Zte Corporation Procédés et systèmes d'ordonnancement multicanal sur une ou plusieurs cellules

Similar Documents

Publication Publication Date Title
CN110278062B (zh) 资源指示、确定方法及装置
AU2021212111B2 (en) Uplink transmission method and corresponding equipment
CN111684749B (zh) 用于harq-ack码本确定的方法和装置
US9313008B2 (en) Selecting between normal and virtual dual layer ACK/NACK
CN105393485B (zh) 无线通信系统中的方法和节点
CN110505697B (zh) 一种混合自动重传请求的传输方法、终端及基站
CN110546903B (zh) 反馈信息的发送和接收方法、装置以及通信系统
US10355897B2 (en) Method and apparatus for transmission of uplink control information
US20140211767A1 (en) Scheduling Communications
KR20200037769A (ko) 데이터를 전송하는 방법과 단말 장치
US20230198683A1 (en) Information transmission method and apparatus
US20220369296A1 (en) Method and apparatus for transmitting downlink control information
WO2019154126A1 (fr) Procédé et dispositif de détermination de livre de codes de rétroaction
JP2020519194A (ja) 送信方法、端末装置および基地局
US20220278810A1 (en) Method of uplink acknowledgment for downlink data received on an unlicensed band in a radio access network
CN115399018A (zh) 上行链路控制信息报告
WO2021161060A1 (fr) Procédé d&#39;accusé de réception harq-ack pour des données de liaison descendante reçues sur une bande sans licence dans un réseau d&#39;accès radio
US20220201728A1 (en) Method of acknowledgment transmission on uplink for downlink data receptions through a channel of an unlicensed band in a radio access network, user equipment and base station
US20220053547A1 (en) Uplink information generation method and device thereof
WO2022117102A1 (fr) Procédé de transmission d&#39;informations de commande de liaison montante, procédé de réception, terminal et dispositif de réseau
US11974265B2 (en) Use of priority mismatch indication for uplink transmission for wireless networks
CN115119530A (zh) 用于频率复用下行链路数据传输的半静态harq-ack码本构造
US20230354313A1 (en) Intra-user equipment multiplexing method, user equipment, and radio node for enabling the method
CN117616710A (zh) 通信方法、设备和计算机存储介质

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20737531

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205 DATED 15.11.2022)

122 Ep: pct application non-entry in european phase

Ref document number: 20737531

Country of ref document: EP

Kind code of ref document: A1