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EP-4256732-B1 - PRIORITY-BASED HYBRID AUTOMATIC REPEAT REQUEST ACKNOWLEDGEMENT (HARQ-ACK) FEEDBACK

EP4256732B1EP 4256732 B1EP4256732 B1EP 4256732B1EP-4256732-B1

Inventors

  • HUANG, YI
  • YANG, WEI
  • ELSHAFIE, AHMED

Dates

Publication Date
20260506
Application Date
20211103

Claims (13)

  1. A method (700) of wireless communication at a user equipment, UE (120), comprising: receiving (710) downlink data from a base station (110); transmitting (720), to the base station via a physical uplink control channel, PUCCH, format 1 and based at least in part on the downlink data, a first hybrid automatic repeat request acknowledgement, HARQ-ACK, bit associated with a high priority using a first quantity of symbols, wherein transmitting the first HARQ-ACK bit comprises transmitting one or more repetitions of the first HARQ-ACK bit using the first quantity of symbols; and transmitting (730), to the base station via the PUCCH format 1 and based at least in part on the downlink data, a second HARQ-ACK bit associated with a low priority using a second quantity of symbols that is less than the first quantity of symbols, wherein transmitting the second HARQ-ACK bit comprises transmitting one or more repetitions of the second HARQ-ACK bit using the second quantity of symbols, wherein a quantity of the one or more repetitions of the first HARQ-ACK bit is greater than a quantity of the one or more repetitions of the second HARQ-ACK bit to increase a reliability of the first HARQ-ACK bit in relation to the second HARQ-ACK bit.
  2. The method of claim 1, wherein transmitting the first HARQ-ACK bit and transmitting the second HARQ-ACK bit comprises transmitting HARQ-ACK feedback via the PUCCH format 1 based at least in part on a time division multiplexing of the first HARQ-ACK bit and the second HARQ-ACK bit.
  3. The method of claim 1, further comprising: receiving, from the base station via a radio resource control message, a parameter that defines one or more of the first quantity of symbols and the second quantity of symbols.
  4. The method of claim 1, further comprising: receiving, from the base station via downlink control information, a parameter that defines one or more of the first quantity of symbols and the second quantity of symbols.
  5. The method of claim 1, wherein transmitting the first HARQ-ACK bit and transmitting the second HARQ-ACK bit comprises transmitting the first HARQ-ACK bit earlier in time as compared to the second HARQ-ACK bit, and wherein the first quantity of symbols occurs earlier in time as compared to the second quantity of symbols.
  6. The method of claim 1, further comprising: transmitting, to the base station via the PUCCH format 1 and based at least in part on the downlink data, the one or more repetitions of the first HARQ-ACK bit associated with the high priority further using the second quantity of symbols.
  7. The method of claim 1, wherein transmitting the first HARQ-ACK bit comprises: transmitting the first HARQ-ACK bit using the first quantity of symbols associated with a first frequency band; and transmitting the first HARQ-ACK bit using a third quantity of symbols associated with a second frequency band; and transmitting the second HARQ-ACK bit comprises: transmitting the second HARQ-ACK bit using the second quantity of symbols associated with the first frequency band; and transmitting the second HARQ-ACK bit using a fourth quantity of symbols associated with the second frequency band, wherein the fourth quantity of symbols is less than the third quantity of symbols.
  8. The method of claim 1, wherein transmitting the first HARQ-ACK bit comprises: transmitting the first HARQ-ACK bit using the first quantity of symbols and transmitting the first HARQ-ACK bit using the second quantity of symbols, wherein the first quantity of symbols and the second quantity of symbols are associated with a first frequency band; and transmitting the first HARQ-ACK bit using a third quantity of symbols and transmitting the first HARQ-ACK bit using a fourth quantity of symbols, wherein the third quantity of symbols and the fourth quantity of symbols are associated with a second frequency band, and wherein the fourth quantity of symbols is less than the third quantity of symbols; and transmitting the second HARQ-ACK bit comprises: transmitting the second HARQ-ACK bit using the second quantity of symbols associated with the first frequency band and transmitting the second HARQ-ACK bit using the fourth quantity of symbols associated with the second frequency band.
  9. A method (800) of wireless communication at a base station (110), comprising: transmitting (810) downlink data to a user equipment, UE (120); receiving (820), from the UE via a physical uplink control channel, PUCCH, format 1 and based at least in part on the downlink data, a first hybrid automatic repeat request acknowledgement, HARQ-ACK, bit associated with a high priority using a first quantity of symbols, wherein receiving the first HARQ-ACK bit comprises receiving one or more repetitions of the first HARQ-ACK bit using the first quantity of symbols; and receiving (830), from the UE via the PUCCH format 1 and based at least in part on the downlink data, a second HARQ-ACK bit associated with a low priority using a second quantity of symbols that is less than the first quantity of symbols, wherein receiving the second HARQ-ACK bit comprises receiving one or more repetitions of the second HARQ-ACK bit using the second quantity of symbols, wherein a quantity of the one or more repetitions of the first HARQ-ACK bit is greater than a quantity of the one or more repetitions of the second HARQ-ACK bit to increase a reliability of the first HARQ-ACK bit in relation to the second HARQ-ACK bit.
  10. An apparatus at a user equipment, UE (120), for wireless communication, comprising: a memory (282); and one or more processors (258, 264, 280) coupled to the memory, the one or more processors configured to: receive downlink data from a base station (110); transmit, to the base station via a physical uplink control channel, PUCCH, format 1 and based at least in part on the downlink data, a first hybrid automatic repeat request acknowledgement, HARQ-ACK, bit associated with a high priority using a first quantity of symbols, wherein transmitting the first HARQ-ACK bit comprises transmitting one or more repetitions of the first HARQ-ACK bit using the first quantity of symbols; and transmit, to the base station via the PUCCH format 1 and based at least in part on the downlink data, a second HARQ-ACK bit associated with a low priority using a second quantity of symbols that is less than the first quantity of symbols, wherein transmitting the second HARQ-ACK bit comprises transmitting one or more repetitions of the second HARQ-ACK bit using the second quantity of symbols, wherein a quantity of the one or more repetitions of the first HARQ-ACK bit is greater than a quantity of the one or more repetitions of the second HARQ-ACK bit to increase a reliability of the first HARQ-ACK bit in relation to the second HARQ-ACK bit.
  11. An apparatus at a base station (110) for wireless communication, comprising: a memory (242); and one or more processors (220, 238, 240) coupled to the memory, the one or more processors configured to: transmit downlink data to a user equipment, UE (120); receive, from the UE via a physical uplink control channel, PUCCH, format 1 and based at least in part on the downlink data, a first hybrid automatic repeat request acknowledgement, HARQ-ACK, bit associated with a high priority using a first quantity of symbols, wherein receiving the first HARQ-ACK bit comprises receiving one or more repetitions of the first HARQ-ACK bit using the first quantity of symbols; receive, from the UE via the PUCCH format 1 and based at least in part on the downlink data, a second HARQ-ACK bit associated with a low priority using a second quantity of symbols that is less than the first quantity of symbols, wherein receiving the second HARQ-ACK bit comprises receiving one or more repetitions of the second HARQ-ACK bit using the second quantity of symbols, wherein a quantity of the one or more repetitions of the first HARQ-ACK bit is greater than a quantity of the one or more repetitions of the second HARQ-ACK bit to increase a reliability of the first HARQ-ACK bit in relation to the second HARQ-ACK bit; decode the received HARQ-ACK bits.
  12. A non-transitory computer readable medium comprising instructions, which when executed by a processor at a user equipment, UE, cause the UE to perform the method of any of claims 1-8.
  13. A non-transitory computer readable medium comprising instructions, which when executed by a processor at a base station, cause the base station to perform the method of claim 9.

Description

FIELD OF THE DISCLOSURE Aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for priority-based hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback. BACKGROUND Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, or the like). Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency-division multiple access (FDMA) systems, orthogonal frequency-division multiple access (OFDMA) systems, single-carrier frequency-division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP). A wireless network may include a number of base stations (BSs) that can support communication for a number of user equipment (UEs). A user equipment (UE) may communicate with a base station (BS) via the downlink and uplink. The downlink (or forward link) refers to the communication link from the BS to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein, a BS may be referred to as a Node B, a gNB, an access point (AP), a radio head, a transmit receive point (TRP), a New Radio (NR) BS, a 5G Node B, or the like. The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user equipment to communicate on a municipal, national, regional, and even global level. New Radio (NR), which may also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP). NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL), using CP-OFDM and/or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. As the demand for mobile broadband access continues to increase, further improvements in LTE, NR, and other radio access technologies remain useful. WILUS INC: "Discussion on Intra-UE multiplexing/prioritization for UKLLC/IIoT", 3GPP DRAFT; R1-2009248, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE; 650, ROUTE DES LUCIOLES; F-06921 SOPHIA-ANTIPOLIS CEDEX; FRANCE, vol. RAN WG1, no. e-Meeting; 20201026-2020111324; October 2020 (2020-10-24) discusses intra-UE multiplexing and prioritization. MODERATOR (OPPO): "Summary#1 of email thread [103-e-NR-IIOT_URLLC enh-04]", 3GPP DRAFT; R1-2009546, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE; 650, ROUTE DES LUCIOLES; F-06921 SOPHIA-ANTIPOLIS CEDEX; FRANCE, vol. RAN WG1, no. e-Meeting; 20200817-2020082817; November 2020 (2020-11-17) discusses intra-UE multiplexing and prioritization. MCC SUPPORT: "Draft Report of 3GPP TSG RAN WG1 #102-e vO.2. 0 (Online meeting, 17th-28th August 2020)", 3GPP DRAFT; DRAFT_MINUTES_REPORT_RAN1#102-E_V02 0, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX; FRANCE, vol. RAN WG1, no. e-Meeting; 20201026 -2020111319; September 2020 (2020-09-19) discusses minutes of the meeting. SUMMARY The present invention is defined in the independent claims. Preferred, optional, features are recited in the accompanying dependent claims. The foregoing has outlined rather broadly the features and technical advantages of examples according to the disclosure in order that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. Characteristics of the concepts disclosed herein, both their organization and method of operation, together with associated advantages will be better understood from the following description when considered in connection with the accompanying figures. Each of the figures is provided for the purposes of illustration and description, and not as a definition of the limits of the claims. BRIEF DESCRIPTION OF THE DRAWINGS So that the above-recited features of the present disclosure can be understood in d