# US 2019/0356409 A1 · Mcs update in group control channel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0356409 A1 - Document ID: US20190356409A1 - Status: Published application - Kind: A1 - Application number: 16/405,448 - Filed: 2019-05-07 - Published: 2019-11-21 - Earliest claimed: 2018-05-17 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Piyush GUPTA; Junyi LI; Chong LI - Web page: https://patentgrep.com/patent/US20190356409A1 ## CPC - H04L 1/0003: {by switching between different modulation schemes} - H04L 1/0022: {in which mode-switching is influenced by the user} - H04L 1/0025: {Transmission of mode-switching indication} - H04L 1/0028: {Formatting} - H04L 1/1614: {using bitmaps} - H04L 1/1671: {the supervisory signal being transmitted together with control information} - H04L 1/1854: {Scheduling and prioritising arrangements} - H04L 1/1887: {Scheduling and prioritising arrangements} - H04L 1/1896: {ARQ related signaling} - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04L 5/0091: {Signalling for the administration of the divided path, e.g. signalling of configuration information} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04L 5/0005: {Time-frequency} - H04L 5/0035: {Resource allocation in a cooperative multipoint environment} - 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 communication are described. A wireless device may receive an indicator of retransmission scheduling for a plurality of UEs, determine, based on a modulation and coding scheme (MCS) update in the indicator, resources for receiving a retransmission, and receive the retransmission on the determined resources. A base station may receive a negative acknowledgement report from at least one UE of a plurality of UEs, determine a modulation and coding scheme (MCS) update for the at least one UE, generate an indicator of retransmission scheduling for the plurality of UEs, the indicator including the MCS update for the at least one UE, and transmit the indicator. ## Claims ### Claim 1 A method performed by a user equipment (UE) for wireless communication, the method comprising: receiving an indicator of retransmission scheduling for a plurality of UEs; determining, based on a modulation and coding scheme (MCS) update in the indicator, resources for receiving a retransmission; and receiving the retransmission on the determined resources. ### Claim 2 (depends on 1) The method of claim 1, wherein the indicator includes a bitmap indicating which of the plurality of UEs reported a negative acknowledgement or a positive acknowledgement for a prior transmission. ### Claim 3 (depends on 1) The method of claim 1, wherein the MCS update includes, for at least one UE that reported a negative acknowledgement for a prior transmission, a MCS delta with respect to a MCS of a prior transmission. ### Claim 4 (depends on 3) The method of claim 3, further comprising determining the resources for receiving the retransmission based on the MCS delta and a position of the UE in a sequential ordering of the plurality of UEs. ### Claim 5 (depends on 3) The method of claim 3, further comprising determining the resources for receiving the retransmission based on the MCS delta and a UE index included in the indicator. ### Claim 6 (depends on 1) The method of claim 1, wherein the determining the resources comprises identifying resource blocks for receiving the retransmission based on a position of the UE in a sequential ordering of the plurality of UEs. ### Claim 7 (depends on 1) The method of claim 1, wherein the identifying the resource blocks further comprises identifying at least a particular resource block in which the UE received a prior transmission. ### Claim 8 (depends on 1) The method of claim 1, wherein the indicator of retransmission scheduling is received on a group control channel. ### Claim 9 An apparatus for wireless communications, comprising: a processor; memory in electronic communication with the processor; and instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to: receive an indicator of retransmission scheduling for a plurality of UEs; determine, based on a modulation and coding scheme (MCS) update in the indicator, resources for receiving a retransmission; and receive the retransmission on the determined resources. ### Claim 10 (depends on 9) The apparatus of claim 9, wherein the indicator includes a bitmap indicating which of the plurality of UEs reported a negative acknowledgement or a positive acknowledgement for a prior transmission. ### Claim 11 (depends on 9) The apparatus of claim 9, wherein the MCS update includes, for at least one UE that reported a negative acknowledgement for a prior transmission, a MCS delta with respect to a MCS of a prior transmission. ### Claim 12 (depends on 11) The apparatus of claim 11, the instructions further operable to cause the apparatus to determine the resources for receiving the retransmission based on the MCS delta and a position of the UE in a sequential ordering of the plurality of UEs. ### Claim 13 (depends on 11) The apparatus of claim 11, the instructions further operable to cause the apparatus to determine the resources for receiving the retransmission based on the MCS delta and a UE index included in the indicator. ### Claim 14 (depends on 9) The apparatus of claim 9, wherein the determining the resources comprises identifying resource blocks for receiving the retransmission based on a position of the UE in a sequential ordering of the plurality of UEs. ### Claim 15 (depends on 9) The apparatus of claim 9, wherein the identifying the resource blocks further comprises identifying at least a particular resource block in which the UE received a prior transmission. ### Claim 16 (depends on 9) The apparatus of claim 9, wherein the indicator of retransmission scheduling is received on a group control channel. ### Claim 17 A method for wireless communication, comprising: receiving a negative acknowledgement report from at least one UE of a plurality of user equipments (UEs); determining a modulation and coding scheme (MCS) update for the at least one UE; generating an indicator of retransmission scheduling for the plurality of UEs, the indicator including the MCS update for the at least one UE; and transmitting the indicator. ### Claim 18 (depends on 17) The method of claim 17, the determining the MCS update for the at least one UE is based on channel state feedback received from the at least one UE. ### Claim 19 (depends on 17) The method of claim 17, wherein the indicator is transmitted on a group control channel for the plurality of UEs. ### Claim 20 (depends on 17) The method of claim 17, wherein the indicator includes a bitmap indicating which of the plurality of UEs reported a negative acknowledgement or a positive acknowledgement of a prior transmission. ### Claim 21 (depends on 20) The method of claim 20, wherein the prior transmission is scheduled based on semi-persistent scheduling. ### Claim 22 (depends on 17) The method of claim 17, wherein the MCS update includes a MCS delta with respect to a MCS of a prior transmission to the at least one UE. ### Claim 23 (depends on 22) The method of claim 22, wherein the MCS update further includes a UE index of the at least one UE. ### Claim 24 (depends on 17) The method of claim 17, further comprising assigning resources for a retransmission to the at least one UE based at least in part on a position of the at least one UE in a sequential ordering of the plurality of UEs. ### Claim 25 (depends on 24) The method of claim 24, further comprising assigning, for the retransmission, at least a particular resource block on which a prior transmission was transmitted to the at least one UE. ### Claim 26 An apparatus for wireless communications, comprising: a processor; memory in electronic communication with the processor; and instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to: receive a negative acknowledgement report from at least one UE of a plurality of user equipments (UEs); determine a modulation and coding scheme (MCS) update for the at least one UE; generate an indicator of retransmission scheduling for the plurality of UEs, the indicator including the MCS update for the at least one UE; and transmit the indicator. ### Claim 27 (depends on 26) The apparatus of claim 26, wherein the indicator includes a bitmap indicating which of the plurality of UEs reported a negative acknowledgement or a positive acknowledgement of a prior transmission. ### Claim 28 (depends on 26) The apparatus of claim 26, wherein the MCS update includes a MCS delta with respect to a MCS of a prior transmission to the at least one UE. ### Claim 29 (depends on 28) The apparatus of claim 28, wherein the MCS update further includes a UE index of the at least one UE. ### Claim 30 (depends on 26) The apparatus of claim 26, the instructions further operable to cause the apparatus to assign resources for a retransmission to the at least one UE based at least in part on a position of the at least one UE in a sequential ordering of the plurality of UEs. ### Claim 31 (depends on 30) The apparatus of claim 30, the instructions further operable to cause the apparatus to assign, for the retransmission, at least a particular resource block on which a prior transmission was transmitted to the at least one UE.