# US 12,120,060 B2 · Acknowledgement codebook design for multiple transmission reception points > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,120,060 B2 - Document ID: US12120060B2 - Status: Granted - Kind: B2 - Application number: 16/573,832 - Filed: 2019-09-17 - Published: 2020-03-19 - Granted: 2024-10-15 - Earliest claimed: 2018-09-19 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM incorporated - Inventors: Wei Yang; Yi Huang; Peter Gaal; Xiaoxia Zhang - Web page: https://patentgrep.com/patent/US12120060B2 ## CPC - H04L 1/1854: {Scheduling and prioritising arrangements} - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04L 1/1819: {with retransmission of additional or different redundancy} - H04L 1/1858: {Transmission or retransmission of more than one copy of acknowledgement message} - H04L 1/1896: {ARQ related signaling} - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04W 52/06: TPC algorithms - H04W 52/10: Open loop power control - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 1/1664: {the supervisory signal being transmitted together with payload signals; piggybacking} - H04L 1/1671: {the supervisory signal being transmitted together with control information} - H04W 52/08: Closed loop power control - 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 Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a slot allocation to provide hybrid automatic repeat request (HARQ) acknowledgement (ACK) feedback to multiple transmission reception points (TRPs). For example, each TRP may be allocated at least one slot for HARQ-ACK feedback such that HARQ-ACK feedback for different TRPs may not be transmitted in a same slot. Additionally, the UE may determine a TRP-specific HARQ-ACK codebook for feedback transmissions to each TRP in their corresponding slots. In some cases, the UE may also determine TRP-specific uplink parameters for the feedback transmissions to each TRP. The UE may then transmit feedback to a TRP using a corresponding slot from the slot allocation and using the TRP-specific HARQ-ACK codebook and the TRP-specific uplink parameters. ## Claims ### Claim 1 A method for wireless communication at a user equipment (UE), comprising: receiving, from a network device, a combined slot allocation for physical uplink control channel (PUCCH) transmissions to different transmission reception points (TRPs) of a plurality of TRPs associated with the network device, wherein the combined slot allocation identifies: a first slot that is allocated for PUCCH transmissions to a first TRP of the plurality of TRPs, and a second slot that is allocated for PUCCH transmissions to a second TRP of the plurality of TRPs, and wherein each slot identified in the combined slot allocation is allocated for PUCCH transmissions by the UE to only one TRP of the plurality of TRPs; and transmitting hybrid automatic repeat request (HARQ) acknowledgement feedback to the first TRP using the first slot identified by the combined slot allocation as allotted for PUCCH transmissions to the first TRP and using one or more TRP-specific uplink parameters. ### Claim 2 (depends on 1) The method of claim 1, wherein receiving the combined slot allocation comprises: receiving a combined allocation of slots from the network device for PUCCH transmissions to different TRPs of the plurality of TRPs, wherein the slots are allocated asymmetrically between the plurality of TRPs. ### Claim 3 (depends on 1) The method of claim 1, further comprising: determining a TRP-specific HARQ acknowledgement codebook based at least in part on at least one TRP-specific parameter that is semi-statically received. ### Claim 4 (depends on 3) The method of claim 3, wherein the at least one TRP-specific parameter is one or more of a number of cells supported by a TRP for carrier aggregation, a cell-specific uplink-downlink configuration associated with a cell of a TRP, a per-bandwidth part table of time-domain resource allocation for physical downlink shared channels for a TRP, a per-bandwidth part set of parameters defining physical downlink shared channel to feedback timing for a TRP, or a per-bandwidth part physical downlink shared channel repetition factor for a TRP. ### Claim 5 (depends on 1) The method of claim 1, further comprising: identifying only one physical downlink shared channel reception opportunity per slot per cell from the first TRP for time-domain resource allocations that overlap in time; and receiving one physical downlink shared channel transmission from the first TRP associated with the identified physical downlink shared channel reception opportunity, wherein the HARQ acknowledgement feedback transmitted in the first slot includes feedback information pertaining to the one physical downlink shared channel reception opportunity or the one physical downlink shared channel transmission. ### Claim 6 (depends on 5) The method of claim 5, further comprising: receiving, from the second TRP, an additional physical downlink shared channel transmission, the additional physical downlink shared channel transmission having a time- domain resource allocation in a same component carrier that overlaps with the one physical downlink shared channel transmission received from the first TRP; and transmitting a second HARQ acknowledgement feedback to the second TRP in the second slot identified by the combined slot allocation as allocated for PUCCH transmission to the second TRP. ### Claim 7 (depends on 1) The method of claim 1, further comprising: comparing the combined slot allocation with a cell-specific uplink-downlink configuration associated with a cell of the first TRP, wherein the HARQ acknowledgement feedback is transmitted to the first TRP using the first slot only if symbols of the first slot are also allocated for uplink transmissions by the cell-specific uplink-downlink configuration. ### Claim 8 (depends on 1) The method of claim 1, further comprising: transmitting additional information to the first TRP using the first slot identified by the combined slot allocation. ### Claim 9 (depends on 8) The method of claim 8, wherein the additional information is in a form of a physical uplink shared channel payload, a scheduling request, or a channel state information report, and wherein the HARQ acknowledgement feedback is combined with the additional information on a single uplink channel. ### Claim 10 (depends on 1) The method of claim 1, wherein transmitting the HARQ acknowledgement feedback to the first TRP using the first slot comprises: transmitting the HARQ acknowledgement feedback via at least one of a physical uplink control channel or as piggybacked uplink control information via a physical uplink shared channel. ### Claim 11 (depends on 1) The method of claim 1, further comprising: determining the one or more TRP-specific uplink parameters, wherein the one or more TRP-specific uplink parameters are for PUCCH transmissions to the first TRP, and wherein the determining comprises: identifying that quasi co-location (QCL) information is configured for physical uplink control channel transmissions; and identifying TRP-specific QCL information for the first TRP for the first slot. ### Claim 12 (depends on 1) The method of claim 1, further comprising: determining the one or more TRP-specific uplink parameters, wherein the one or more TRP-specific uplink parameters are for PUCCH transmissions to the first TRP, and wherein the determining comprises: identifying TRP-specific power control parameters for transmissions to the first TRP for the first slot. ### Claim 13 (depends on 12) The method of claim 12, wherein the TRP-specific power control parameters comprise at least one of an open-loop power control parameter and a closed-loop power control parameter. ### Claim 14 (depends on 1) The method of claim 1, further comprising: determining the one or more TRP-specific uplink parameters, wherein the one or more TRP-specific uplink parameters are for PUCCH transmissions to the first TRP, and wherein the determining comprises: identifying TRP-specific timing advance parameters for transmissions to the first TRP for the first slot. ### Claim 15 (depends on 1) The method of claim 1, wherein receiving the combined slot allocation comprises: receiving the combined slot allocation via radio resource control (RRC) signaling. ### Claim 16 (depends on 1) The method of claim 1, further comprising: determining to transmit a plurality of HARQ acknowledgement feedback messages to the first TRP; identifying a plurality of slots based at least in part on the combined slot allocation to transmit the plurality of HARQ acknowledgement feedback messages to the first TRP; and transmitting the plurality of HARQ acknowledgement feedback messages to the first TRP in the identified plurality of slots. ### Claim 17 (depends on 16) The method of claim 16, wherein the plurality of slots comprises slots allocated only to the first TRP, a number of consecutive slots allocated to any of the plurality of TRPs, a number of consecutive slots allocated to the first TRP, or a combination thereof. ### Claim 18 A method for wireless communication at a first transmission reception point (TRP) of a plurality of TRPs associated with a network device, comprising: identifying, at the first TRP, a combined slot allocation of at least one slot to be used by a user equipment (UE) for physical uplink control channel (PUCCH) transmissions to different TRPs of the plurality of TRPs, the plurality of TRPs further comprising a second TRP, wherein the combined slot allocation identifies: a first slot that is allocated for PUCCH transmissions to the first TRP, and a second slot that is allocated for PUCCH transmissions to the second TRP, and wherein each slot identified in the combined slot allocation is allocated for PUCCH transmissions by the UE to only one TRP of the plurality of TRPs; transmitting a downlink message to the UE; transmitting an indication that the UE is to provide PUCCH transmissions to the different TRPs using the at least one slot identified by the combined slot allocation for each of the different TRPs; and receiving, from the UE and on the first slot identified by the combined slot allocation as allocated for PUCCH transmissions to the first TRP, hybrid automatic repeat request (HARQ) acknowledgement feedback pertaining to the downlink message. ### Claim 19 (depends on 18) The method of claim 18, further comprising: transmitting the combined slot allocation to one or more other TRPs in communication with the UE to facilitate slot allocation coordination between the first TRP and the one or more other TRPs; receiving, from the one or more other TRPs, additional slot allocations identifying slots to be used by the UE for PUCCH transmissions to the one or more other TRPs, wherein each slot identified in the combined slot allocation and the additional slot allocations is allocated for PUCCH transmissions by the UE to only one TRP; or a combination thereof. ### Claim 20 (depends on 18) The method of claim 18, wherein slots of the combined slot allocation are allocated asymmetrically between the plurality of TRPs. ### Claim 21 (depends on 18) The method of claim 18, wherein transmitting the indication comprises: transmitting the indication via a downlink control information message. ### Claim 22 (depends on 18) The method of claim 18, further comprising: transmitting at least one semi-static TRP-specific parameter to the UE. ### Claim 23 (depends on 22) The method of claim 22, wherein the at least one semi-static TRP-specific parameter is one or more of a number of cells supported by the first TRP for carrier aggregation, a cell-specific uplink-downlink configuration associated with a cell of the first TRP, a per-bandwidth part table of time-domain resource allocation for physical downlink shared channels for the first TRP, a per-bandwidth part set of parameters defining physical downlink shared channel to feedback timing for the first TRP, or a per-bandwidth part physical downlink shared channel repetition factor for the first TRP. ### Claim 24 (depends on 18) The method of claim 18, wherein receiving the HARQ acknowledgement feedback pertaining to the downlink message comprises: receiving the HARQ acknowledgement feedback on the first slot identified by the combined slot allocation only if the first slot is identified as an uplink slot by a cell-specific uplink-downlink configuration associated with the first TRP. ### Claim 25 (depends on 18) The method of claim 18, wherein receiving the HARQ acknowledgement feedback pertaining to the downlink message comprises: receiving the HARQ acknowledgement feedback on symbols of the first slot identified by the combined slot allocation only if the symbols of the first slot are allocated for uplink transmissions by a cell-specific uplink-downlink configuration associated with the first TRP. ### Claim 26 (depends on 18) The method of claim 18, further comprising: receiving additional information from the UE using the first slot identified by the combined slot allocation. ### Claim 27 (depends on 26) The method of claim 26, wherein the additional information is in a form of a physical uplink shared channel payload, a scheduling request, or a channel state information report, and wherein the HARQ acknowledgement feedback pertaining to the downlink message is combined with the additional information on a single uplink channel. ### Claim 28 (depends on 19) The method of claim 19, wherein receiving the HARQ acknowledgement feedback pertaining to the downlink message comprises: receiving the HARQ acknowledgement feedback via at least one of a physical uplink control channel or as piggybacked uplink control information via a physical uplink shared channel. ### Claim 29 (depends on 18) The method of claim 18, further comprising: transmitting TRP-specific quasi co-location (QCL) information to the UE. ### Claim 30 (depends on 18) The method of claim 18, further comprising: transmitting TRP-specific power control parameters to the UE for transmissions to the first TRP during the first slot. ### Claim 31 (depends on 18) The method of claim 18, further comprising: transmitting TRP-specific timing advance parameters to the UE for transmissions to the first TRP during the first slot. ### Claim 32 (depends on 18) The method of claim 18, further comprising: transmitting the combined slot allocation via radio resource control (RRC) signaling. ### Claim 33 An apparatus for wireless communication at a user equipment (UE), comprising: a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: receive, from a network device, a combined slot allocation for physical uplink control channel (PUCCH) transmissions to different transmission reception points (TRPs) of a plurality of TRPs associated with the network device, wherein the combined slot allocation identifies: a first slot that is allocated for PUCCH transmissions to a first TRP of the plurality of TRPs, and a second slot that is allocated for PUCCH transmissions to a second TRP of the plurality of TRPs, and wherein each slot identified in the combined slot allocation is allocated for PUCCH transmissions by the UE to only one TRP of the plurality of TRPs; and transmit hybrid automatic repeat request (HARQ) acknowledgement feedback to the first TRP using the first slot identified by the combined slot allocation as allocated for PUCCH transmissions to the first TRP and using one or more TRP-specific uplink parameters. ### Claim 34 (depends on 33) The apparatus of claim 33, wherein the instructions to receive the combined slot allocation are executable by the processor to cause the apparatus to: receive a combined allocation of slots for PUCCH transmissions to different TRPs of the plurality of TRPs, wherein the slots are allocated asymmetrically between the plurality of TRPs. ### Claim 35 (depends on 33) The apparatus of claim 33, wherein the instructions are further executable by the processor to cause the apparatus to: determine a TRP-specific HARQ acknowledgement codebook based at least in part on at least one TRP-specific parameter that is semi-statically received. ### Claim 36 (depends on 33) The apparatus of claim 33, wherein the instructions are further executable by the processor to cause the apparatus to: identify only one physical downlink shared channel reception opportunity per slot per cell from the first TRP for time-domain resource allocations that overlap in time; and receive one physical downlink shared channel transmission from the first TRP associated with the identified physical downlink shared channel reception opportunity, wherein the HARQ acknowledgement feedback transmitted in the first slot includes feedback information pertaining to the one physical downlink shared channel reception opportunity or the one physical downlink shared channel transmission. ### Claim 37 (depends on 36) The apparatus of claim 36, wherein the instructions are further executable by the processor to cause the apparatus to: receive, from the second TRP, an additional physical downlink shared channel transmission, the additional physical downlink shared channel transmission having a time- domain resource allocation in a same component carrier that overlaps with the one physical downlink shared channel transmission received from the first TRP; and transmit a second HARQ acknowledgement feedback to the second TRP in the second slot identified by the combined slot allocation as allocated for PUCCH transmissions to the second TRP. ### Claim 38 (depends on 33) The apparatus of claim 33, wherein the instructions to transmit the HARQ acknowledgement feedback to the first TRP using the first slot are executable by the processor to cause the apparatus to: transmit the HARQ acknowledgement feedback via at least one of a physical uplink control channel or as piggybacked uplink control information via a physical uplink shared channel. ### Claim 39 (depends on 33) The apparatus of claim 33, wherein the instructions are further executable by the processor to cause the apparatus to: determine the one or more TRP-specific uplink parameters, wherein the one or more TRP-specific uplink parameters are for HARQ acknowledgement feedback PUCCH transmissions to the first TRP, and wherein the instructions to determine the one or more TRP-specific uplink parameters are executable by the processor to cause the apparatus to: identify TRP-specific power control parameters for transmissions to the first TRP for the first slot. ### Claim 40 (depends on 33) The apparatus of claim 33, wherein the instructions are further executable by the processor to cause the apparatus to: determine to transmit a plurality of HARQ acknowledgement feedback messages to the first TRP; identify a plurality of slots based at least in part on the combined slot allocation to transmit the plurality of HARQ acknowledgement feedback messages to the first TRP; and transmit the plurality of HARQ acknowledgement feedback messages to the first TRP in the identified plurality of slots. ### Claim 41 An apparatus for wireless communication at a first transmission reception point (TRP) of a plurality of TRPs associated with a network device, comprising: a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: identify, at the first TRP, a combined slot allocation of at least one slot to be used by a user equipment (UE) for physical uplink control channel (PUCCH) transmissions to different TRPs of the plurality of TRPs, the plurality of TRPs further comprising a second TRP, wherein the combined slot allocation identifies: a first slot that is allocated for PUCCH transmissions to the first TRP, and a second slot that is allocated for PUCCH transmissions to the second TRP, and wherein each slot identified in the combined slot allocation is allocated for PUCCH transmissions by the UE to only one TRP of the plurality of TRPs; transmit a downlink message to the UE; transmit an indication that the UE is to provide PUCCH transmissions to the different TRPs using the at least one slot identified by the combined slot allocation for each of the different TRPs; and receive, from the UE and on the first slot identified by the combined slot allocation as allocated for PUCCH transmissions to the first TRP, hybrid automatic repeat request (HARQ) acknowledgement feedback pertaining to the downlink message. ### Claim 42 (depends on 41) The apparatus of claim 41, wherein the instructions are further executable by the processor to cause the apparatus to: transmit the combined slot allocation to one or more other TRPs in communication with the UE to facilitate slot allocation coordination between the first TRP and the one or more other TRPs; and receive, from the one or more other TRPs, additional slot allocations identifying slots to be used by the UE for PUCCH transmissions to the one or more other TRPs, wherein each slot identified in the combined slot allocation and the additional slot allocations is allocated for PUCCH transmissions by the UE to only one TRP. ### Claim 43 (depends on 41) The apparatus of claim 41, wherein slots of the combined slot allocation are allocated asymmetrically between the plurality of TRPs. ### Claim 44 (depends on 41) The apparatus of claim 41, wherein the instructions to transmit the indication are executable by the processor to cause the apparatus to: transmit the indication via a downlink control information message. ### Claim 45 An apparatus for wireless communication at a user equipment (UE), comprising: means for receiving, from a network device, a combined slot allocation for physical uplink control channel (PUCCH) transmissions to different transmission reception points (TRPs) of a plurality of TRPs associated with the network device, wherein the combined slot allocation identifies: a first slot that is allocated for PUCCH transmissions to a first TRP of the plurality of TRPs, and a second slot that is allocated for PUCCH transmissions to a second TRP of the plurality of TRPs, and wherein each slot identified in the combined slot allocation is allocated for PUCCH transmissions by the UE to only one TRP of the plurality of TRPs; and means for transmitting hybrid automatic repeat request (HARQ) acknowledgement feedback to the first TRP using the first slot identified by the combined slot allocation as allocated for PUCCH transmissions to the first TRP and using one or more TRP- specific uplink parameters. ### Claim 46 An apparatus for wireless communication at a first transmission reception point (TRP) of a plurality of TRPs associated with a network device, comprising: means for identifying, at the first TRP, a combined slot allocation of at least one slot to be used by a user equipment (UE) for physical uplink control channel (PUCCH) transmissions to different TRPs of the plurality of TRPs, the plurality of TRPs further comprising a second TRP, wherein the slot combined allocation identifies: a first slot that is allocated for PUCCH transmissions to the first TRP, and a second slot that is allocated for PUCCH transmissions to the second TRP, and wherein each slot identified in the combined slot allocation is allocated for PUCCH transmissions by the UE to only one TRP of the plurality of TRPs; means for transmitting the combined slot allocation to one or more other TRPs in communication with the UE to facilitate slot allocation coordination between the first TRP and the one or more other TRPs; means for transmitting a downlink message to the UE; means for transmitting an indication that the UE is to provide PUCCH transmissions to the different TRPs using the at least one slot identified by the combined slot allocation for each of the different TRPs; and means for receiving, from the UE and on the first slot identified by the combined slot allocation as allocated for PUCCH transmissions to the first TRP, hybrid automatic repeat request (HARQ) acknowledgement feedback pertaining to the downlink message. ### Claim 47 A non-transitory, computer-readable medium storing code for wireless communication at a user equipment (UE), the code comprising instructions executable by a processor to: receive, from a network device, a combined slot allocation for physical uplink control channel (PUCCH) transmissions to different transmission reception points (TRPs) of a plurality of TRPs associated with a network device, wherein the combined slot allocation identifies: a first slot that is allocated for PUCCH transmissions to a first TRP of the plurality of TRPs, and a second slot that is allocated for PUCCH transmissions to a second TRP of the plurality of TRPs, and wherein each slot identified in the combined slot allocation is allocated for PUCCH transmissions by the UE to only one TRP of the plurality of TRPs; and transmit hybrid automatic repeat request (HARQ) acknowledgement feedback to the first TRP using the first slot identified by the combined slot allocation as allocated for PUCCH transmissions to the first TRP and using one or more TRP-specific uplink parameters. ### Claim 48 A non-transitory, computer-readable medium storing code for wireless communication at a first transmission reception point (TRP) of a plurality of TRPs associated with a network device, the code comprising instructions executable by a processor to: identify, at the first TRP, a combined slot allocation of at least one slot to be used by a user equipment (UE) for physical uplink control channel (PUCCH) transmissions to different TRPs of the plurality of TRPs, the plurality of TRPs further comprising a second TRP, wherein the combined slot allocation identifies: a first slot that is allocated for PUCCH transmissions to the first TRP, and a second slot that is allocated for PUCCH transmissions to the second TRP, and wherein each slot identified in the combined slot allocation is allocated for PUCCH transmissions by the UE to only one TRP of the plurality of TRPs; transmit the combined slot allocation to one or more other TRPs in communication with the UE to facilitate slot allocation coordination between the first TRP and the one or more other TRPs; transmit a downlink message to the UE; transmit an indication that the UE is to provide PUCCH transmissions to the different TRPs using the at least one slot identified by the combined slot allocation for each of the different TRPs; and receive, from the UE and on the first slot identified by the combined slot allocation as allocated for PUCCH transmissions to the first TRP, hybrid automatic repeat request (HARQ) acknowledgement feedback pertaining to the downlink message.