# US 2022/0046684 A1 · Flexible scheduling for multicast wireless communication > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0046684 A1 - Document ID: US20220046684A1 - Status: Published application - Kind: A1 - Application number: 17/379,846 - Filed: 2021-07-19 - Published: 2022-02-10 - Earliest claimed: 2020-08-06 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Alberto RICO ALVARINO; Le LIU; Kazuki TAKEDA; Ayan SENGUPTA - Web page: https://patentgrep.com/patent/US20220046684A1 ## CPC - H04L 1/1896: {ARQ related signaling} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - 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 4/06: Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services - H04W 72/30: Resource management for broadcast services - H04L 1/0061: {Error detection codes} - H04L 1/1614: {using bitmaps} - H04L 1/1822: involving configuration of automatic repeat request [ARQ] with parallel processes - H04L 12/189: {in combination with wireless systems (selective distribution or broadcast in wireless communication networks H04W4/06)} - H04L 2001/0093: {Point-to-multipoint} - H04W 72/121: for groups of terminals or users - 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 A base station multicasts a physical downlink shared channel (PDSCH) transmission and transmits downlink control associated with the PDSCH, wherein the downlink control comprises different parameters for uplink transmissions to multiple user equipments (UEs). A UE receives the associated the PDSCH, where the downlink control comprises different parameters for uplink transmissions to multiple UEs including an uplink transmission parameter for the UE. The UE receives the multicast PDSCH and transmits the uplink transmission based on the uplink transmission parameter for the UE and the multicast PDSCH. ## Claims ### Claim 1 An apparatus for wireless communication at a base station, comprising: a memory; and at least one processor coupled to the memory and configured to: transmit downlink control associated with a physical downlink shared channel (PDSCH) transmission for multicast, wherein the downlink control comprises different parameters for uplink transmissions to multiple user equipments (UEs); and transmit the PDSCH transmission. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the downlink control includes a first physical downlink control channel (PDCCH) associated with the PDSCH transmission and a second PDCCH associated with the PDSCH transmission, wherein the first PDCCH indicates a first parameter for a first UE associated with the PDSCH and the second PDCCH indicates a second parameter for a second UE associated with the PDSCH. ### Claim 3 (depends on 2) The apparatus of claim 2, wherein the first PDCCH and the second PDCCH schedule a same PDSCH for the multiple UEs. ### Claim 4 (depends on 3) The apparatus of claim 3, wherein the first PDCCH is associated with a first identifier, the second PDCCH is associated with a second identifier, and the PDSCH is associated with a third identifier, wherein the first PDCCH and the second PDCCH indicate the third identifier for the PDSCH. ### Claim 5 (depends on 4) The apparatus of claim 4, wherein the PDCCH is associated with an identifier based on at least one of: coded bits of the PDCCH being scrambled by a sequence initialized by the identifier, a search space candidate for the PDCCH being based on the identifier, or a cyclic redundancy check (CRC) for the PDCCH being scrambled by the identifier. ### Claim 6 (depends on 4) The apparatus of claim 4, wherein the first identifier comprises a first cell radio network temporary identifier (C-RNTI) and the second identifier comprises a second C-RNTI, and the third identifier comprises a group radio network temporary identifier (G-RNTI). ### Claim 7 (depends on 4) The apparatus of claim 4, wherein the first identifier, the second identifier, and the third identifier each comprise a G-RNTI. ### Claim 8 (depends on 4) The apparatus of claim 4, wherein the first PDCCH and the second PDCCH include a field that indicates the third identifier for the PDSCH. ### Claim 9 (depends on 8) The apparatus of claim 8, wherein the field indicates a multicast service included in the PDSCH. ### Claim 10 (depends on 1) The apparatus of claim 1, wherein the different parameters include one or more of different timing parameters for hybrid automatic repeat request (HARQ) feedback, different parameters for a hybrid automatic repeat request (HARQ) codebook, and wherein the different parameters are for a downlink assignment indicator (DAI), a supplementary uplink (SUL) transmission or a normal uplink (NUL) transmission. ### Claim 11 (depends on 1) The apparatus of claim 1, wherein the memory and the at least one processor are further configured to: configure a first UE with a first set of parameters associated with a set of codepoints; and configure a second UE with a second set of parameters associated with the set of codepoints, wherein the downlink control comprises a codepoint from the set of codepoints. ### Claim 12 (depends on 1) The apparatus of claim 1, wherein the downlink control indicates a set of parameters and for each parameter indicates to each of the multiple UEs which parameter of the set of parameters to apply. ### Claim 13 (depends on 12) The apparatus of claim 12, wherein the downlink control comprises downlink control information (DCI) including a sequence of fields, each of the fields being configured separately, and the sequence of fields includes one or more of: a first reserved type of field, which the UE ignores; and a second reserved type of field, which the UE compares with a value. ### Claim 14 (depends on 12) The apparatus of claim 12, wherein the downlink control indicates changes for the different parameters relative to an idle mode configuration. ### Claim 15 (depends on 12) The apparatus of claim 12, wherein the downlink control includes one or more fields that are defined or derived from a separate configuration. ### Claim 16 (depends on 12) The apparatus of claim 12, wherein the downlink control includes one or more fixed fields indicates a starting bit and length for non-fixed fields. ### Claim 17 An apparatus for wireless communication at a user equipment (UE), comprising: a memory; and at least one processor coupled to the memory and configured to: receive downlink control associated with a multicast physical downlink shared channel (PDSCH), wherein the downlink control comprises different parameters for uplink transmissions to multiple user equipments (UEs) including an uplink transmission parameter for the UE; receive the multicast PDSCH; and transmit the uplink transmission based on the uplink transmission parameter for the UE and the multicast PDSCH. ### Claim 18 (depends on 17) The apparatus of claim 17, wherein the downlink control is associated with a first identifier and the multicast PDSCH is associated with a second identifier that is common to multiple UEs. ### Claim 19 (depends on 18) The apparatus of claim 18, wherein the first identifier is based on at least one of: coded bits of a physical downlink control channel (PDCCH) being scrambled by a sequence initialized by the identifier, a search space candidate for the PDCCH being based on the identifier, or a cyclic redundancy check (CRC) for the PDCCH being scrambled by the identifier. ### Claim 20 (depends on 18) The apparatus of claim 18, wherein the first identifier comprises a first cell radio network temporary identifier (C-RNTI) and the second identifier includes a group radio network temporary identifier (G-RNTI). ### Claim 21 (depends on 18) The apparatus of claim 18, wherein the first identifier comprises a first group radio network temporary identifier (G-RNTI) and the second identifier comprises a second G-RNTI. ### Claim 22 (depends on 18) The apparatus of claim 18, wherein the downlink control includes a field that indicates the second identifier for the PDSCH. ### Claim 23 (depends on 22) The apparatus of claim 22, wherein the field indicates a multicast service included in the PDSCH. ### Claim 24 (depends on 17) The apparatus of claim 17, wherein the uplink transmission parameter includes at least one of a timing parameter for hybrid automatic repeat request (HARQ) feedback, or a hybrid automatic repeat request (HARQ) codebook, the uplink transmission parameter being for a downlink assignment indicator (DAI), a supplementary uplink (SUL) transmission, or a normal uplink (NUL) transmission. ### Claim 25 (depends on 17) The apparatus of claim 17, wherein the memory and the at least one processor are further configured to: receive a configuration of a first set of parameters associated with a set of codepoints, wherein the downlink control comprises a codepoint from the set of codepoints and the apparatus is configured to transmit the uplink transmission using the parameter associated with the codepoint received in the downlink control. ### Claim 26 (depends on 17) The apparatus of claim 17, wherein the downlink control indicates a set of parameters and for each parameter indicates to each of the multiple UEs which parameter of the set of parameters to apply. ### Claim 27 (depends on 26) The apparatus of claim 26, wherein the downlink control and comprises downlink control information (DCI) including a sequence of fields, each of the fields being configured separately. ### Claim 28 (depends on 17) The apparatus of claim 17, further comprising: postpone hybrid automatic repeat request (HARQ) feedback for the multicast PDSCH until a next slot if the downlink control schedules the HARQ feedback in a downlink only slot. ### Claim 29 A method of wireless communication at a base station, comprising: transmitting downlink control associated with a physical downlink shared channel (PDSCH) transmission for multicast, wherein the downlink control comprises different parameters for uplink transmissions to multiple user equipments (UEs); and multicasting the PDSCH transmission. ### Claim 30 A method of wireless communication at a user equipment (UE), comprising: receiving downlink control associated with a multicast PDSCH, wherein the downlink control comprises different parameters for uplink transmissions to multiple UEs including an uplink transmission parameter for the UE; receiving the multicast PDSCH; and transmitting the uplink transmission based on the uplink transmission parameter for the UE and the multicast PDSCH.