# US 2019/0356455 A1 · Providing acknowledgement/negative acknowledgement (ack/nack) feedback for downlink semi-persistent scheduling (sps) with sub-slot periodicity > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0356455 A1 - Document ID: US20190356455A1 - Status: Published application - Kind: A1 - Application number: 16/413,390 - Filed: 2019-05-15 - Published: 2019-11-21 - Earliest claimed: 2018-05-20 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Wei YANG; Sony AKKARAKARAN; Yi HUANG; Jing JIANG; Joseph SORIAGA; Chih-Ping LI; Linhai HE - Web page: https://patentgrep.com/patent/US20190356455A1 ## CPC - H04L 1/1887: {Scheduling and prioritising arrangements} - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ] - H04L 1/1854: {Scheduling and prioritising arrangements} - H04L 1/1861: {Physical mapping arrangements (for ACK signaling see also H04L5/0053)} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04L 1/0001: {Systems modifying transmission characteristics according to link quality, e.g. power backoff (adaptive data allocation for multicarrier modulation H04L5/0044; controlling transmission power for radio systems H04W52/04)} - H04L 5/0082: {at predetermined intervals} - H04L 5/1469: {using time-sharing} - 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 a configuration that indicates a first sub-slot periodicity for downlink semi-persistent scheduling (SPS). The UE may receive a plurality of transmissions according to the first sub-slot periodicity in a first slot, wherein the first sub-slot periodicity enables receiving the plurality of transmissions within a single slot. The UE may transmit hybrid automatic repeat request acknowledgement (HARQ-ACK) information in a second slot, wherein the second slot includes a plurality of physical uplink control channels (PUCCHs) with a second sub-slot periodicity, and wherein the HARQ-ACK information is associated with the plurality of transmissions. Numerous other aspects are provided. ## Claims ### Claim 1 A method of wireless communication performed by a user equipment (UE), comprising: receiving a configuration that indicates a first sub-slot periodicity for downlink semi-persistent scheduling (SPS); receiving a plurality of transmissions according to the first sub-slot periodicity in a first slot, wherein the first sub-slot periodicity enables receiving the plurality of transmissions within a single slot; and transmitting hybrid automatic repeat request acknowledgement (HARQ-ACK) information in a second slot, wherein the second slot includes a plurality of physical uplink control channels (PUCCHs) with a second sub-slot periodicity, and wherein the HARQ-ACK information is associated with the plurality of transmissions. ### Claim 2 (depends on 1) The method of claim 1, wherein the configuration for the downlink SPS identifies a plurality of physical uplink control channel (PUCCH) resources for the HARQ-ACK information. ### Claim 3 (depends on 1) The method of claim 1, wherein the HARQ-ACK information is transmitted within the second slot based at least in part on at least one of the configuration for downlink SPS or downlink control information (DCI) that activates the downlink SPS. ### Claim 4 (depends on 1) The method of claim 1, wherein first HARQ-ACK information of the HARQ-ACK information and second HARQ-ACK information of the HARQ-ACK information are transmitted via subsequent PUCCH resources, wherein the first HARQ-ACK information is associated with a first transmission of the plurality of transmissions and the second HARQ-ACK information is associated with a second transmission of the plurality of transmissions, wherein the second transmission is received subsequent to the first transmission. ### Claim 5 (depends on 1) The method of claim 1, wherein a number of symbols between two transmissions of the plurality of transmissions is different than a number of symbols between two sets of HARQ-ACK information included in the HARQ-ACK information. ### Claim 6 (depends on 1) The method of claim 1, wherein a first set of HARQ-ACK information of the HARQ-ACK information corresponds to a first group of the plurality of transmissions and a second set of HARQ-ACK information of the HARQ-ACK information corresponds to a second group of the plurality of transmissions, wherein the first group of the plurality of transmissions does not overlap with the second group of the plurality of transmissions. ### Claim 7 (depends on 6) The method of claim 6, wherein the first set of HARQ-ACK information includes multiplexed HARQ-ACK information associated with the first group of the plurality of transmissions. ### Claim 8 (depends on 7) The method of claim 7, wherein the multiplexed HARQ-ACK information is transmitted in a single physical uplink control channel (PUCCH). ### Claim 9 (depends on 7) The method of claim 7, wherein the first set of HARQ-ACK information comprises a one bit bundled HARQ-ACK information representative of whether all transmissions of the first group of the plurality of transmissions were received. ### Claim 10 (depends on 7) The method of claim 7, wherein the second set of HARQ-ACK information is transmitted via a subsequent PUCCH resource to a PUCCH resource that was used to transmit the first set of HARQ-ACK information. ### Claim 11 (depends on 1) The method of claim 1, wherein the first sub-slot periodicity equals the second sub-slot periodicity. ### Claim 12 (depends on 1) The method of claim 1, wherein first HARQ-ACK information of HARQ-ACK information and second HARQ-ACK information of the HARQ-ACK information are transmitted via PUCCH resources, wherein the first HARQ-ACK information is associated with a first transmission of the plurality of transmissions and the second HARQ-ACK information is associated with a second transmission of the plurality of transmissions, wherein the second transmission is received subsequent to the first transmission, and wherein the first HARQ-ACK information is transmitted via a first PUCCH resource of the PUCCH resources and the second HARQ-ACK information is transmitted via a second PUCCH resource of the PUCCH resources, wherein the second PUCCH resource is transmitted subsequent to the first PUCCH resource corresponding to the second transmission being received subsequent to the first transmission. ### Claim 13 (depends on 1) The method of claim 1, wherein a hybrid automatic repeat request (HARD) process identifier, associated with each of the plurality transmissions, is based at least in part on a starting symbol number of a physical downlink shared channel (PDSCH) transmission. ### Claim 14 (depends on 1) The method of claim 1, wherein the configuration comprises a bitmap that indicates a plurality of starting locations for a plurality of physical downlink shared channel (PDSCH) transmissions within a single slot. ### Claim 15 (depends on 1) The method of claim 1, wherein the configuration indicates a number of physical uplink control channel (PUCCH) resources per slot, wherein the number of PUCCH resources corresponds to a number of downlink SPS physical downlink shared channel (PDSCH) transmissions per slot. ### Claim 16 (depends on 15) The method of claim 15, wherein PUCCH resources of the number of PUCCH resources are not uniformly spaced in time per slot. ### Claim 17 (depends on 1) The method of claim 1, wherein the first sub-slot periodicity is a sub-slot periodicity of an uplink slot. ### Claim 18 A method of wireless communication performed by a user equipment (UE), comprising: receiving a configuration that indicates a sub-slot periodicity for downlink semi-persistent scheduling (SPS); receiving a plurality of transmissions within a single slot according to the sub-slot periodicity; and transmitting hybrid automatic repeat request acknowledgement (HARQ-ACK) information associated with receiving the plurality of transmissions within the single slot based at least in part on a HARQ-ACK feedback scheme associated with the downlink SPS. ### Claim 19 (depends on 18) The method of claim 18, wherein the configuration for the downlink SPS identifies one physical uplink control channel (PUCCH) resource for the HARQ-ACK information. ### Claim 20 (depends on 18) The method of claim 18, wherein the HARQ-ACK information has a number of bits corresponding to a number of physical downlink shared channel (PDSCH) transmissions received in a slot. ### Claim 21 (depends on 18) The method of claim 18, wherein the HARQ-ACK information comprises a seven-bit multiplexed HARQ-ACK information when the sub-slot periodicity comprises a two symbol periodicity, or wherein the HARQ-ACK information comprises a two-bit multiplexed HARQ-ACK information when the sub-slot periodicity comprises a seven symbol periodicity. ### Claim 22 (depends on 18) The method of claim 18, wherein the HARQ-ACK information is transmitted via a resource of a physical uplink control channel (PUCCH) based at least in part on at least one of the configuration for downlink SPS or downlink control information (DCI) that activates the downlink SPS. ### Claim 23 (depends on 18) The method of claim 18, wherein the HARQ-ACK information is transmitted via a physical uplink control channel (PUCCH). ### Claim 24 (depends on 23) The method of claim 23, wherein a first format of the PUCCH is used for a first sub-slot periodicity and a second format of the PUCCH is used for a second sub-slot periodicity, wherein the first format is different from the second format. ### Claim 25 (depends on 18) The method of claim 18, wherein the HARQ-ACK information comprises first HARQ-ACK information associated with the downlink SPS multiplexed with second HARQ-ACK information associated with dynamic scheduling. ### Claim 26 (depends on 25) The method of claim 25, wherein the HARQ-ACK information is transmitted via a resource of a physical uplink control channel (PUCCH) indicated by a PUCCH resource indicator of downlink control information (DCI) received via a physical downlink control channel (PDCCH) carrying a dynamic scheduling downlink grant. ### Claim 27 (depends on 18) The method of claim 18, wherein the HARQ-ACK information comprises a one bit bundled HARQ-ACK information with a value representative of whether all transmissions of the plurality of transmissions are received or all transmissions of the plurality of transmissions are not received. ### Claim 28 (depends on 18) The method of claim 18, wherein, when a processing timeline requirement cannot be satisfied for at least one of the plurality of transmissions, the HARQ-ACK information is transmitted for remaining transmissions, of the plurality of transmissions, that satisfy the processing timeline requirement. ### Claim 29 (depends on 28) The method of claim 28, wherein the HARQ-ACK information comprises a number of bits corresponding to a number of transmissions that are received, within the single slot, that satisfy the processing timeline requirement. ### Claim 30 (depends on 28) The method of claim 28, wherein the HARQ-ACK information comprises a one bit HARQ-ACK information with a value representative of whether all transmissions, of the plurality of transmissions, that satisfy the processing timeline requirement are received or all transmissions, of the plurality of transmissions, that satisfy the processing timeline requirement are not received. ### Claim 31 (depends on 28) The method of claim 28, wherein HARQ-ACK information bits of the HARQ-ACK information that are associated with the downlink SPS are dropped and ACK or NACKs of the HARQ-ACK information that are associated with dynamic scheduling are transmitted. ### Claim 32 (depends on 28) The method of claim 28, wherein the plurality of transmissions are scheduled via the downlink SPS and the HARQ-ACK information indicates a NACK based at least in part on a determination that the processing timeline requirement cannot be satisfied for the at least one of the plurality of transmissions, and wherein the HARQ-ACK information is multiplexed with HARQ-ACK information associated with dynamically scheduled transmissions. ### Claim 33 (depends on 32) The method of claim 32, wherein the HARQ-ACK information that indicates the NACK comprises a one bit NACK. ### Claim 34 (depends on 28) The method of claim 28, wherein the HARQ-ACK information is dropped based at least in part on the at least one of the transmissions not satisfying the processing timeline requirement. ### Claim 35 (depends on 18) The method of claim 18, wherein a hybrid automatic repeat request (HARD) process identifier, associated with each of the plurality transmissions, is based at least in part on a starting symbol number of a physical downlink shared channel (PDSCH) transmission. ### Claim 36 (depends on 18) The method of claim 18, wherein the sub-slot periodicity is a sub-slot periodicity of an uplink slot. ### Claim 37 A method of wireless communication performed by a base station (BS), comprising: transmitting a configuration for downlink semi-persistent scheduling (SPS) to a user equipment (UE), wherein the downlink SPS has a periodicity of less than one slot and the configuration includes a physical uplink control channel (PUCCH) configuration for hybrid automatic repeat request acknowledgement (HARQ-ACK) information; and decoding the HARQ-ACK information, received from the UE via one or more PUCCH transmissions, based at least in part on the configuration. ### Claim 38 (depends on 37) The method of claim 37, wherein the configuration comprises a bitmap that indicates a plurality of starting locations for a plurality of physical downlink shared channel (PDSCH) transmissions within a single slot. ### Claim 39 (depends on 37) The method of claim 37, wherein the configuration indicates a number of physical downlink shared channel (PDSCH) transmissions within a single slot. ### Claim 40 (depends on 37) The method of claim 37, wherein a duration of each PDSCH transmission is included within downlink control information (DCI). ### Claim 41 (depends on 37) The method of claim 37, wherein the configuration includes a parameter that identifies one of a plurality of schemes for the HARQ-ACK information, wherein the parameter is to be used by the UE to generate the HARQ-ACK information. ### Claim 42 (depends on 37) The method of claim 37, wherein the configuration is semi-statically configured via radio resource control (RRC) signaling or dynamically configured via an activation of SPS within downlink control information (DCI). ### Claim 43 (depends on 37) The method of claim 37, wherein the configuration indicates that one PUCCH resource per slot is to carry a number of bits for the HARQ-ACK information, wherein the number of bits corresponds to a number of downlink SPS physical downlink shared channel (PDSCH) transmissions per slot. ### Claim 44 (depends on 37) The method of claim 37, wherein the configuration indicates a format for the PUCCH, and the format is associated with a number of bits for the HARQ-ACK information. ### Claim 45 (depends on 37) The method of claim 37, wherein the configuration indicates that two PUCCH resources are assigned per slot, an allocation of each of the two PUCCH resources, and a format of the two PUCCH resources. ### Claim 46 (depends on 45) The method of claim 45, wherein timing between the two PUCCH resources within a slot is indicated via activation downlink control information (DCI). ### Claim 47 (depends on 37) The method of claim 37, wherein the configuration indicates a number of PUCCH resources per slot, wherein the number of PUCCH resources corresponds to a number of downlink SPS physical downlink shared channel (PDSCH) transmissions per slot. ### Claim 48 (depends on 47) The method of claim 47, wherein PUCCH resources of the number of PUCCH resources are not uniformly spaced in time per slot. ### Claim 49 (depends on 37) The method of claim 37, wherein a hybrid automatic repeat request (HARD) process identifier, associated with the each of the plurality of transmissions, is based at least in part on a starting symbol number of a physical downlink shared channel (PDSCH) transmission. ### Claim 50 A user equipment (UE) for wireless communication, comprising: memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors configured to: receive a configuration that indicates a first sub-slot periodicity for downlink semi-persistent scheduling (SPS); receive a plurality of transmissions according to the first sub-slot periodicity in a first slot, wherein the first sub-slot periodicity enables receiving the plurality of transmissions within a single slot; and transmit hybrid automatic repeat request acknowledgement (HARQ-ACK) information in a second slot, wherein the second slot includes a plurality of physical uplink control channels (PUCCH) with a second sub-slot periodicity, and wherein the HARQ-ACK information is associated with the plurality of transmissions.