# US 12,009,939 B2 · Hybrid automatic repeat request process management for broadcast > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,009,939 B2 - Document ID: US12009939B2 - Status: Granted - Kind: B2 - Application number: 17/649,426 - Filed: 2022-01-31 - Published: 2022-11-10 - Granted: 2024-06-11 - Earliest claimed: 2021-05-05 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Le Liu; Alberto Rico Alvarino; Kazuki Takeda; Prasad Reddy Kadiri; Umesh Phuyal - Web page: https://patentgrep.com/patent/US12009939B2 ## CPC - H04L 12/1868: {Measures taken after transmission, e.g. acknowledgments} - H04L 12/189: {in combination with wireless systems (selective distribution or broadcast in wireless communication networks H04W4/06)} - H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ] - H04L 1/1822: involving configuration of automatic repeat request [ARQ] with parallel processes - H04L 1/1845: {Combining techniques, e.g. code combining} - H04L 1/189: {Transmission or retransmission of more than one copy of a message} - H04L 1/1896: {ARQ related signaling} - H04L 5/0064: {Rate requirement of the data, e.g. scalable bandwidth, data priority} - H04L 5/0091: {Signalling for the administration of the divided path, e.g. signalling of configuration information} - H04L 2001/0093: {Point-to-multipoint} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive one or more repetitions of a broadcast message for broadcast service in one or more transmission occasions. The UE may determine a hybrid automatic repeat request (HARQ) configuration that indicates whether HARQ combining is supported for the broadcast message based at least in part on one or more properties of the broadcast message. The UE may perform a decode attempt on a transport block carried in the one or more repetitions of the broadcast message based at least in part on the HARQ configuration. Numerous other aspects are described. ## Claims ### Claim 1 A user equipment (UE) for wireless communication, comprising: one or more memories; and one or more processors, coupled to the one or more memories, configured to: receive one or more repetitions of a broadcast message for broadcast service in one or more transmission occasions; determine a hybrid automatic repeat request (HARQ) configuration that indicates whether HARQ combining is supported for the broadcast message based at least in part on one or more properties of the broadcast message; combine, using one or more HARQ processes, the one or more repetitions of the broadcast message based at least in part on the HARQ configuration indicating that HARQ combining is supported for the broadcast message, wherein the one or more HARQ processes are associated with supporting HARQ combining for unicast or multicast service; and perform a decode attempt on a transport block carried in the one or more repetitions of the broadcast message based at least in part on the HARQ configuration. ### Claim 2 (depends on 1) The UE of claim 1, wherein the one or more processors, to perform the decode attempt on the transport block carried in the one or more repetitions of the broadcast message, are configured to: perform the decode attempt on the transport block carried in individual transmission occasions based at least in part on the HARQ configuration indicating that HARQ combining is not supported for the broadcast message. ### Claim 3 (depends on 1) The UE of claim 1, wherein the one or more processors are further configured to: combine the one or more repetitions of the broadcast message in a soft buffer associated with a HARQ process based at least in part on the HARQ configuration indicating that HARQ combining is supported for the broadcast message; and wherein the one or more processors, to perform the decode attempt on the transport block, are configured to: perform the decode attempt on the transport block based at least in part on data stored in the soft buffer associated with the HARQ process. ### Claim 4 (depends on 3) The UE of claim 3, wherein the HARQ process is a dedicated HARQ process associated with HARQ combining for broadcast service. ### Claim 5 (depends on 4) The UE of claim 4, wherein the one or more processors, to combine the one or more repetitions of the broadcast message in the soft buffer, are configured to: determine the dedicated HARQ process based at least in part on a mapping between the dedicated HARQ process and a group common radio network temporary identity (G-RNTI) associated with broadcast service. ### Claim 6 (depends on 5) The UE of claim 5, wherein the one or more processors are further configured to: receive a group common physical downlink control channel that indicates one of multiple dedicated HARQ processes based at least in part on the G-RNTI associated with the broadcast message. ### Claim 7 (depends on 3) The UE of claim 3, wherein the HARQ process is a shared dedicated HARQ process associated with HARQ combining for broadcast service or data carried in a system information block (SIB). ### Claim 8 (depends on 3) The UE of claim 3, wherein the HARQ process is selected from the one or more HARQ processes associated with supporting HARQ combining for unicast or multicast service. ### Claim 9 (depends on 8) The UE of claim 8, wherein the one or more processors are further configured to: receive an indication assigning the one or more HARQ processes, associated with supporting HARQ combining for unicast or multicast service, to one or more of unicast service, multicast service, or broadcast service, wherein the HARQ process is selected from the one or more HARQ processes, associated with supporting HARQ combining for unicast or multicast service, based at least in part on the indication. ### Claim 10 (depends on 8) The UE of claim 8, wherein the one or more processors are further configured to: transmit information to register interest in one or more broadcast services; and receive an indication enabling selection of the HARQ process from the one or more HARQ processes, associated with supporting HARQ combining for unicast or multicast service, based at least in part on the information to register interest in the one or more broadcast services. ### Claim 11 (depends on 1) The UE of claim 1, wherein the one or more properties include a multicast channel carrying the broadcast message. ### Claim 12 (depends on 1) The UE of claim 1, wherein the one or more properties include a data rate or a quality of service requirement associated with broadcast service. ### Claim 13 (depends on 1) The UE of claim 1, wherein the one or more properties include a radio resource control (RRC) status associated with the UE. ### Claim 14 (depends on 13) The UE of claim 13, wherein the HARQ configuration indicates whether HARQ combining is supported for the broadcast message while the UE is in an RRC idle or inactive state. ### Claim 15 (depends on 13) The UE of claim 13, wherein the HARQ configuration indicates whether HARQ combining is supported for the broadcast message while the UE is in an RRC connected state based at least in part on a reported UE capability on HARQ combining. ### Claim 16 A method of wireless communication performed by a user equipment (UE), comprising: receiving one or more repetitions of a broadcast message for broadcast service in one or more transmission occasions; determining a hybrid automatic repeat request (HARQ) configuration that indicates whether HARQ combining is supported for the broadcast message based at least in part on one or more properties of the broadcast message; combining, using one or more HARQ processes, the one or more repetitions of the broadcast message when the HARQ configuration indicates that HARQ combining is supported for the broadcast message, wherein the one or more HARQ processes are associated with supporting HARQ combining for unicast or multicast service; and performing a decode attempt on a transport block carried in the one or more repetitions of the broadcast message based at least in part on the HARQ configuration. ### Claim 17 (depends on 16) The method of claim 16, wherein performing the decode attempt on the transport block carried in the one or more repetitions of the broadcast message comprises: performing the decode attempt on the transport block carried in individual transmission occasions when the HARQ configuration indicates that HARQ combining is not supported for the broadcast message. ### Claim 18 (depends on 16) The method of claim 16, further comprising: combining the one or more repetitions of the broadcast message in a soft buffer associated with a HARQ process based at least in part on the HARQ configuration indicating that HARQ combining is supported for the broadcast message; and wherein performing the decode attempt on the transport block comprises: performing the decode attempt on the transport block based at least in part on data stored in the soft buffer associated with the HARQ process. ### Claim 19 (depends on 18) The method of claim 18, wherein the HARQ process is a dedicated HARQ process associated with HARQ combining for broadcast service. ### Claim 20 (depends on 19) The method of claim 19, wherein combining the one or more repetitions of the broadcast message in the soft buffer comprises: determining the dedicated HARQ process based at least in part on a mapping between the dedicated HARQ process and a group common radio network temporary identity (G-RNTI) associated with broadcast service. ### Claim 21 (depends on 20) The method of claim 20, further comprising: receiving a group common physical downlink control channel that indicates one of multiple dedicated HARQ processes based at least in part on the G-RNTI associated with the broadcast message. ### Claim 22 (depends on 18) The method of claim 18, wherein the HARQ process is a shared dedicated HARQ process associated with HARQ combining for broadcast service or data carried in a system information block (SIB). ### Claim 23 (depends on 16) The method of claim 16, wherein combining the one or more repetitions of the broadcast message comprises: combining the one or more repetitions of the broadcast message in a soft buffer associated with a HARQ process when the HARQ configuration indicates that HARQ combining is supported for the broadcast message, wherein the HARQ process is selected from the one or more HARQ processes associated with supporting HARQ combining for unicast or multicast service. ### Claim 24 (depends on 23) The method of claim 23, further comprising: receiving an indication assigning the one or more HARQ processes, associated with supporting HARQ combining for unicast or multicast service, to one or more of unicast service, multicast service, or broadcast service, wherein the HARQ process is selected from the one or more HARQ processes, associated with supporting HARQ combining for unicast or multicast service, based at least in part on the indication. ### Claim 25 (depends on 23) The method of claim 23, further comprising: transmitting information to register interest in one or more broadcast services; and receiving an indication enabling selection of the HARQ process from the one or more HARQ processes, associated with supporting HARQ combining for unicast or multicast service, based at least in part on the information to register interest in the one or more broadcast services. ### Claim 26 (depends on 16) The method of claim 16, wherein the one or more properties include a multicast channel carrying the broadcast message. ### Claim 27 (depends on 16) The method of claim 16, wherein the one or more properties include a data rate or a quality of service requirement associated with the broadcast message. ### Claim 28 (depends on 16) The method of claim 16, wherein the one or more properties include a radio resource control (RRC) status associated with the UE. ### Claim 29 A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising: one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the UE to: receive one or more repetitions of a broadcast message for broadcast service in one or more transmission occasions; determine a hybrid automatic repeat request (HARQ) configuration that indicates whether HARQ combining is supported for the broadcast message based at least in part on one or more properties of the broadcast message; combine, using one or more HARQ processes, the one or more repetitions of the broadcast message based at least in part on the HARQ configuration indicating that HARQ combining is supported for the broadcast message, wherein the one or more HARQ processes are associated with supporting HARQ combining for unicast or multicast service; and perform a decode attempt on a transport block carried in the one or more repetitions of the broadcast message based at least in part on the HARQ configuration. ### Claim 30 An apparatus for wireless communication, comprising: means for receiving one or more repetitions of a broadcast message for broadcast service in one or more transmission occasions; means for determining a hybrid automatic repeat request (HARQ) configuration that indicates whether HARQ combining is supported for the broadcast message based at least in part on one or more properties of the broadcast message; means for combining, using one or more HARQ processes, the one or more repetitions of the broadcast message based at least in part on the HARQ configuration indicating that HARQ combining is supported for the broadcast message, wherein the one or more HARQ processes are associated with supporting HARQ combining for unicast or multicast service; and means for performing a decode attempt on a transport block carried in the one or more repetitions of the broadcast message based at least in part on the HARQ configuration.