# US 2023/0065698 A1 · Harq-less operations for downlink and uplink communications > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0065698 A1 - Document ID: US20230065698A1 - Status: Published application - Kind: A1 - Application number: 17/446,400 - Filed: 2021-08-30 - Published: 2023-03-02 - Earliest claimed: 2021-08-30 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Wei YANG; Jay Kumar SUNDARARAJAN; Hwan Joon KWON; Aziz GHOLMIEH; Krishna Kiran MUKKAVILLI; Tingfang JI; Naga BHUSHAN - Web page: https://patentgrep.com/patent/US20230065698A1 ## CPC - H04L 1/1864: {ARQ related signaling (H04L1/1607 takes precedence)} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 1/0025: {Transmission of mode-switching indication} - H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ] - H04L 1/1896: {ARQ related signaling} - H04W 72/1263: Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, a grant for a communication with the base station. The UE may determine whether the communication is associated with a hybrid automatic repeat request (HARQ)-based transmission mode or a HARQ-less transmission mode. The UE may communicate with the base station based at least in part on the grant and the determination of whether the communication is associated with the HARQ-based transmission mode or the HARQ-less transmission mode. Numerous other aspects are described. ## Claims ### Claim 1 A user equipment (UE) for wireless communication, comprising: a memory; and one or more processors, coupled to the memory, configured to: receive, from a base station, a grant for a communication with the base station; determine whether the communication is associated with a hybrid automatic repeat request (HARQ)-based transmission mode or a HARQ-less transmission mode; and communicate with the base station based at least in part on the grant and the determination of whether the communication is associated with the HARQ-based transmission mode or the HARQ-less transmission mode. ### Claim 2 (depends on 1) The UE of claim 1, wherein the one or more processors are further configured to: receive, via downlink control information (DCI) associated with the grant, an indication of whether the communication is associated with the HARQ-based transmission mode or the HARQ-less transmission mode, wherein the one or more processors, to determine whether the communication is associated with the HARQ-based transmission mode or the HARQ-less transmission mode, are configured to determine whether the communication is associated with the HARQ-based transmission mode or the HARQ-less transmission mode based at least in part on the indication. ### Claim 3 (depends on 2) The UE of claim 2, wherein the indication is provided by at least one of: an indication in a dedicated field, in the DCI, for indicating whether the communication is associated with the HARQ-based transmission mode or the HARQ-less transmission mode, a radio network temporary identifier (RNTI) associated with the DCI, a DCI format associated with the DCI, an indication in at least one of a redundancy version field, a new data indicator field, or a HARQ process identifier field in the DCI, a control resource set (CORESET) in which the DCI associated with the grant is received, a slot index of a slot in which the DCI associated with the grant is received or a slot in which the communication is scheduled, or a control channel element (CCE) in which the DCI associated with the grant is received. ### Claim 4 (depends on 1) The UE of claim 1, wherein the one or more processors are further configured to: receive, from the base station, an indication of one or more HARQ process identifiers that are associated with the HARQ-less transmission mode wherein the one or more processors, to determine whether the communication is associated with the HARQ-based transmission mode or the HARQ-less transmission mode, are configured to determine whether a HARQ process identifier associated with the grant is included in the one or more HARQ process identifiers that are associated with the HARQ-less transmission mode. ### Claim 5 (depends on 1) The UE of claim 1, wherein the one or more processors are further configured to: receive, from the base station, a configuration that indicates that all downlink communications or all uplink communications in a bandwidth part or a cell are associated with the HARQ-based transmission mode or the HARQ-less transmission mode, wherein the one or more processors, to determine whether the communication is associated with the HARQ-based transmission mode or the HARQ-less transmission mode, are configured to determine whether the communication is associated with the HARQ-based transmission mode or the HARQ-less transmission mode based at least in part on the configuration. ### Claim 6 (depends on 1) The UE of claim 1, wherein the one or more processors, to communicate with the base station, are configured to: communicate with the base station in the HARQ-less transmission mode based at least in part on a determination that the communication is associated with the HARQ-less transmission mode. ### Claim 7 (depends on 6) The UE of claim 6, wherein the communication is a downlink communication, and wherein the one or more processors, to communicate with the base station in the HARQ-less transmission mode, are configured to: receive one or more transmissions of the downlink communication without buffering log-likelihood ratio (LLR) information for the one or more transmissions of the downlink communication; and decode each transmission of the one or more transmissions of the downlink communication without using soft combining with another transmission of the one or more transmissions of the downlink communication. ### Claim 8 (depends on 7) The UE of claim 7, wherein the one or more processors, to communicate with the base station in the HARQ-less transmission mode, are further configured to: transmit, to the base station, a respective acknowledgement (ACK) or negative acknowledgment (NACK) for each of the one or more transmissions of the downlink communication. ### Claim 9 (depends on 7) The UE of claim 7, wherein the one or more transmissions of the downlink communication include a plurality of transmissions of the downlink communication, and wherein the one or more processors, to communicate with the base station in the HARQ-less transmission mode, are further configured to: transmit, to the base station, an indication of a number of acknowledgements (ACKs) or a number of negative acknowledgments (NACKs) associated with the plurality of transmissions of the downlink communication. ### Claim 10 (depends on 6) The UE of claim 6, wherein the communication is a downlink communication, and wherein the one or more processors, to communicate with the base station in the HARQ-less transmission mode, are configured to: detect a failure to correctly decode a transmission of the downlink communication from the base station; and refrain from storing log-likelihood ratio (LLR) information for the transmission of the downlink communication based at least in part on the determination that the communication is associated with the HARQ-less transmission mode. ### Claim 11 (depends on 6) The UE of claim 6, wherein the communication is an uplink communication, and wherein the one or more processors, to communicate with the base station in the HARQ-less transmission mode, are configured to: transmit, to the base station, the uplink communication in an initial transmission of a transport block associated with the uplink communication, wherein the transport block is partitioned into a set of code block groups; receive, from the base station, one or more uplink grants for retransmission of the uplink communication; and re-transmit, to the base station, the uplink communication in a plurality of retransmissions, wherein each retransmission of the plurality of retransmissions includes a respective subset of the set of code block groups included in the transport block transmitted in the initial transmission. ### Claim 12 (depends on 6) The UE of claim 6, wherein the communication is an uplink communication, and wherein the one or more processors, to communicate with the base station in the HARQ-less transmission mode, are configured to: transmit, to the base station, data associated with the uplink communication in a first transport block having a first transport block size; receive, from the base station, an uplink grant for retransmission of the uplink communication; and transmit, to the base station, a first portion of the data associated with the uplink communication in a second transport block having a second transport block size determined based at least in part on a modulation and coding scheme and resource allocation indicated in the uplink grant for the retransmission of the uplink communication. ### Claim 13 (depends on 12) The UE of claim 12, wherein the one or more processors, to communicate with the base station in the HARQ-less transmission mode, are further configured to: receive another uplink grant associated with a new uplink communication; and transmit, to the base station, a third transport block associated with the new uplink communication, wherein the third transport block includes a second portion of the data associated with the uplink communication and other data from a medium access control buffer of the UE. ### Claim 14 (depends on 6) The UE of claim 6, wherein the communication is an uplink communication, and wherein the one or more processors, to communicate with the base station in the HARQ-less transmission mode, are configured to: transmit, to the base station, data associated with the uplink communication; and remove the data associated with the uplink communication from a medium access control buffer of the UE without storing the data associated with the uplink communication in an uplink HARQ buffer of the UE. ### Claim 15 (depends on 1) The UE of claim 1, wherein the communication is an uplink communication, and wherein the one or more processors, to communicate with the base station, are configured to: transmit, in the uplink communication, first data associated with a first logical channel based at least in part on a determination that the communication is associated with the HARQ-less transmission mode; or transmit, in the uplink communication, second data associated with a second logical channel based at least in part on a determination that the communication is associated with the HARQ-based transmission mode. ### Claim 16 A base station for wireless communication, comprising: a memory; and one or more processors, coupled to the memory, configured to: transmit, to a user equipment (UE), a grant for a communication with the base station; transmit, to the UE, an indication of whether the communication is associated with a hybrid automatic repeat request (HARQ)-based transmission mode or a HARQ-less transmission mode; and communicate with the UE based at least in part on the grant and the indication of whether the communication is associated with the HARQ-based transmission mode or the HARQ-less transmission mode. ### Claim 17 (depends on 16) The base station of claim 16, wherein the one or more processors, to communicate with the UE, are configured to: communicate with the UE in the HARQ-less transmission mode based at least in part on the indication indicating that the communication is associated with the HARQ-less transmission mode. ### Claim 18 (depends on 17) The base station of claim 17, wherein the communication is a downlink communication, and wherein the one or more processors, to communicate with the UE in the HARQ-less transmission mode, are configured to: transmit, to the UE, one or more transmissions of the downlink communication, wherein each transmission of the one or more transmissions of the downlink communication is self-decodable without soft combining. ### Claim 19 (depends on 17) The base station of claim 17, wherein the communication is an uplink communication, and wherein the one or more processors, to communicate with the UE in the HARQ-less transmission mode, are configured to: detect a failure to correctly decode a transmission of the uplink communication from the UE; and refrain from storing log-likelihood ratio (LLR) information for the transmission of the uplink communication. ### Claim 20 (depends on 17) The base station of claim 17, wherein the communication is an uplink communication, and wherein the one or more processors, to communicate with the UE in the HARQ-less transmission mode, are configured to: receive, from the UE, the uplink communication in an initial transmission of a transport block associated with the uplink communication, wherein the transport block is partitioned into a set of code block groups; transmit, to the UE, one or more uplink grants for retransmission of the uplink communication based at least in part on a failure to successfully decode he transport block associated with the uplink communication; and receive, from the UE, a plurality of retransmissions, wherein each retransmission of the plurality of retransmissions includes a respective subset of the set of code block groups included in the transport block transmitted in the initial transmission. ### Claim 21 (depends on 17) The base station of claim 17, wherein the communication is an uplink communication, and wherein the one or more processors, to communicate with the UE in the HARQ-less transmission mode, are configured to: receive, from the UE, an uplink communication including a first transport block having a first transport block size, wherein the first transport block includes data associated with the uplink communication; transmit, to the UE, an uplink grant for retransmission of the uplink communication based at least in part on a failure to correctly decode the first transport block; and receive, from the UE, a first portion of the data associated with the uplink communication in a second transport block having a second transport block size determined based at least in part on a modulation and coding scheme and resource allocation indicated in the uplink grant for the retransmission of the uplink communication. ### Claim 22 (depends on 21) The base station of claim 21, wherein the one or more processors, to communicate with the UE in the HARQ-less transmission mode, are configured to: transmit, to the UE, another uplink grant associated with a new uplink communication; and receive, from the UE, a third transport block associated with the new uplink communication, wherein the third transport block includes a second portion of the data associated with the uplink communication and other data from a medium access control buffer of the UE. ### Claim 23 (depends on 17) The base station of claim 17, wherein the communication is an uplink communication, and wherein the one or more processors, to communicate with the UE in the HARQ-less transmission mode, are configured to: transmit, to the UE, an indication to disable repetitions for the uplink communication based at least in part on the communication being associated with the HARQ-less transmission mode; and receive, from the UE, a transmission of the uplink communication. ### Claim 24 (depends on 16) The base station of claim 16, wherein the communication is an uplink communication, and wherein the one or more processors, to communicate with the UE, are configured to: receive, in the uplink communication, first data associated with a first logical channel based at least in part on a determination that the communication is associated with the HARQ-less transmission mode; or receive, in the uplink communication, second data associated with a second logical channel based at least in part on a determination that the communication is associated with the HARQ-based transmission mode. ### Claim 25 A method of wireless communication performed by a user equipment (UE), comprising: receiving, from a base station, a grant for a communication with the base station; determining whether the communication is associated with a hybrid automatic repeat request (HARQ)-based transmission mode or a HARQ-less transmission mode; and communicating with the base station based at least in part on the grant and the determination of whether the communication is associated with the HARQ-based transmission mode or the HARQ-less transmission mode. ### Claim 26 (depends on 25) The method of claim 25, wherein communicating with the base station comprises: communicating with the base station in the HARQ-less transmission mode based at least in part on a determination that the communication is associated with the HARQ-less transmission mode. ### Claim 27 (depends on 26) The method of claim 26, wherein the communication is a downlink communication, and wherein communicating with the base station in the HARQ-less transmission mode comprises: detecting a failure to correctly decode a transmission of the downlink communication from the base station; and refraining from storing log-likelihood ratio (LLR) information for the transmission of the downlink communication based at least in part on the determination that the communication is associated with the HARQ-less transmission mode. ### Claim 28 (depends on 26) The method of claim 26, wherein the communication is an uplink communication, and wherein communicating with the base station in the HARQ-less transmission mode comprises: transmitting, to the base station, the uplink communication in an initial transmission of a transport block associated with the uplink communication, wherein the transport block is partitioned into a set of code block groups; receiving, from the base station, one or more uplink grants for retransmission of the uplink communication; and re-transmitting, to the base station, the uplink communication in a plurality of retransmissions, wherein each retransmission of the plurality of retransmissions includes a respective subset of the set of code block groups included in the transport block transmitted in the initial transmission. ### Claim 29 (depends on 26) The method of claim 26, wherein the communication is an uplink communication, and wherein communicating with the base station in the HARQ-less transmission mode comprises: transmitting, to the base station, data associated with the uplink communication in a first transport block having a first transport block size; receiving, from the base station, an uplink grant for retransmission of the uplink communication; and transmitting, to the base station, a first portion of the data associated with the uplink communication in a second transport block having a second transport block size determined based at least in part on a modulation and coding scheme and resource allocation indicated in the uplink grant for the retransmission of the uplink communication. ### Claim 30 A method of wireless communication performed by a base station, comprising: transmitting, to a user equipment (UE), a grant for a communication with the base station; transmitting, to the UE, an indication of whether the communication is associated with a hybrid automatic repeat request (HARQ)-based transmission mode or a HARQ-less transmission mode; and communicating with the UE based at least in part on the grant and the indication of whether the communication is associated with the HARQ-based transmission mode or the HARQ-less transmission mode.