# US 11,445,499 B2 · MCS/rank adjustment when multiplexing data in a control region > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,445,499 B2 - Document ID: US11445499B2 - Status: Granted - Kind: B2 - Application number: 16/712,794 - Filed: 2019-12-12 - Published: 2020-05-14 - Granted: 2022-09-13 - Earliest claimed: 2017-03-17 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Makesh Pravin John Wilson; Tao Luo; Sony Akkarakaran; Sumeeth Nagaraja; Shengbo Chen; Xiao Feng Wang; Kaushik Chakraborty - Web page: https://patentgrep.com/patent/US11445499B2 ## CPC - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04B 7/063: {Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection} - H04L 1/0026: {Transmission of channel quality indication} - H04L 1/0029: {Reduction of the amount of signalling, e.g. retention of useful signalling or differential signalling (power control H04W52/04)} - H04L 1/0031: {Multiple signaling transmission (H04L1/1664, F15 take precedence)} - H04L 5/0005: {Time-frequency} - H04L 5/0023: {Time-frequency-space} - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0091: {Signalling for the administration of the divided path, e.g. signalling of configuration information} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 72/563: of the wireless resources - H04B 7/088: {using beam selection} - H04L 1/0003: {by switching between different modulation schemes} - H04L 1/0009: {by adapting the channel coding (H04L1/1812 takes precedence)} - H04L 1/007: {Unequal error protection (for format H04L1/0078; for codes per se H03M13/35)} - H04L 1/1861: {Physical mapping arrangements (for ACK signaling see also H04L5/0053)} - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04L 25/0228: {with direct estimation from sounding signals} - H04L 2001/0098: {Unequal error protection} - H04W 52/16: Deriving transmission power values from another channel - H04W 52/262: {taking into account adaptive modulation and coding [AMC] scheme} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A base station may make more efficient use of resources by transmitting data in a control region of a slot in addition to a data region. In order to avoid performance loss, the base station may adjust the data transmission in the control region in comparison to a data transmission in a data region and may signal an indication to a UE to assist the UE in receiving the data transmission in the control region. An apparatus for wireless communication at the UE receives the indication from the base station regarding the data transmission in the control region and uses the indication to perform rate matching or demodulation of the data transmission in the control region. The indication may indicate any of a different MCS/rank/TPR, a reduced MCS/rank/TPR, an MCS/rank/TPR delta, a control span for a group of UEs, and a starting symbol for the data transmission. The indication may also indicate that there is no data transmitted on resources in the control region. ## Claims ### Claim 1 A method of wireless communication at a user equipment (UE), comprising: receiving a control transmission from a base station in a control region of a slot, wherein the UE receives the control transmission using a first reception beam; and receiving a data transmission from the base station using a reception beam based on whether the data transmission is received in the control region of the slot or a data region of the slot, wherein the UE receives the data transmission using the first reception beam when the data transmission is in the control region of the slot and using a second reception beam when the data transmission is in the data region of the slot. ### Claim 2 (depends on 1) The method of claim 1, further comprising: using a reduced modulation and coding scheme (MCS) or a reduced rank to receive the data transmission when the data transmission is in the control region. ### Claim 3 (depends on 2) The method of claim 2, further comprising: receiving an indication from the base station that indicates the reduced MCS or the reduced rank to receive the data transmission that is in the control region. ### Claim 4 (depends on 3) The method of claim 3, wherein the indication indicates an MCS difference for a first MCS for the data transmission in the control region in comparison to a second MCS for a second data transmission in the data region. ### Claim 5 (depends on 3) The method of claim 3, wherein the indication indicates a Traffic-to-pilot Ratio (TPR) difference for a first TPR for the data transmission in the control region and a second TPR for a second data transmission in the data region. ### Claim 6 (depends on 3) The method of claim 3, wherein the indication indicates a rank difference for the data transmission in the control region in comparison to a second rank for a second data transmission in the data region. ### Claim 7 (depends on 3) The method of claim 3, further comprising: performing rate matching for the data transmission in the control region using an updated MCS or rank based on the indication. ### Claim 8 (depends on 3) The method of claim 3, further comprising: performing demodulation of the data transmission in the control region using an updated MCS or rank based on the indication. ### Claim 9 (depends on 3) The method of claim 3, wherein the indication is received as at least one of Radio Resource Control (RRC) signaling, a Medium Access Control (MAC) control element, or downlink control information (DCI). ### Claim 10 (depends on 3) The method of claim 3, wherein the indication indicates a control span for a group of multiple UEs, wherein the control span comprises resources configured as the control region for any of the multiple UEs in the group of multiple UEs. ### Claim 11 (depends on 10) The method of claim 10, wherein the UE uses a reduced modulation and coding scheme (MCS) parameter or a reduced rank parameter for the control span. ### Claim 12 (depends on 3) The method of claim 3, wherein the indication indicates a starting symbol for the data transmission, the method further comprising: determining whether the starting symbol is within the control region; using the reduced MCS or the reduced rank to receive the data transmission, when the starting symbol is within the control region; and using a second MCS or a second rank to receive a second data transmission, when the starting symbol is within the data region. ### Claim 13 An apparatus for wireless communication at a user equipment (UE), comprising: a memory; and at least one processor coupled to the memory, the memory and the at least one processor configured to: receive a control transmission from a base station in a control region of a slot, wherein the UE receives the control transmission using a first reception beam; and receive a data transmission from the base station using a reception beam based on whether the data transmission is received in the control region of the slot or a data region of the slot, wherein the memory and the at least one processor are configured to receive the data transmission using the first reception beam when the data transmission is in the control region of the slot and using a second reception beam when the data transmission is in the data region of the slot. ### Claim 14 (depends on 13) The apparatus of claim 13, wherein the memory and the at least one processor are further configured to use a reduced modulation and coding scheme (MCS) or a reduced rank to receive the data transmission when the data transmission is in the control region. ### Claim 15 (depends on 14) The apparatus of claim 14, wherein the memory and the at least one processor are further configured to: receive an indication from the base station that indicates the reduced MCS or the reduced rank to receive the data transmission in the control region. ### Claim 16 (depends on 15) The apparatus of claim 15, wherein the indication indicates an MCS difference for a first MCS for the data transmission in the control region in comparison to a second MCS for a second data transmission in the data region. ### Claim 17 (depends on 15) The apparatus of claim 15, wherein the indication indicates a Traffic-to-pilot Ratio (TPR) difference for a first TPR for the data transmission in the control region and a second TPR for a second data transmission in the data region. ### Claim 18 (depends on 15) The apparatus of claim 15, wherein the indication indicates a rank difference for the data transmission in the control region in comparison to a second rank for a second data transmission in the data region. ### Claim 19 (depends on 15) The apparatus of claim 15, wherein the memory and the at least one processor are further configured to: perform rate matching for the data transmission in the control region using an updated MCS or rank based on the indication. ### Claim 20 (depends on 15) The apparatus of claim 15, wherein the memory and the at least one processor are further configured to: perform demodulation of the data transmission in the control region using an updated MCS or rank based on the indication. ### Claim 21 (depends on 15) The apparatus of claim 15, wherein the indication is received as at least one of Radio Resource Control (RRC) signaling, a Medium Access Control (MAC) control element, or downlink control information (DCI). ### Claim 22 (depends on 15) The apparatus of claim 15, wherein the indication indicates a control span for a group of multiple UEs, wherein the control span comprises resources configured as the control region for any of the multiple UEs in the group of multiple UEs. ### Claim 23 (depends on 22) The apparatus of claim 22, wherein the memory and the at least one processor are further configured to use a reduced modulation and coding scheme (MCS) parameter or a reduced rank parameter for the control span. ### Claim 24 (depends on 15) The apparatus of claim 15, wherein the indication indicates a starting symbol for the data transmission, and wherein the memory and the at least one processor are further configured to: determine whether the starting symbol is within the control region; use the reduced MCS or the reduced rank to receive the data transmission, when the starting symbol is within the control region; and use a second MCS or a second rank to receive a second data transmission, when the starting symbol is within the data region. ### Claim 25 (depends on 1) The method of claim 1, further comprising: choosing to receive the data transmission from the base station using the first reception beam based on the data transmission being in the control region of the slot. ### Claim 26 (depends on 25) The method of claim 25, further comprising: determining that the data transmission from the base station has at least one symbol that overlaps with the control region of the slot. ### Claim 27 (depends on 13) The apparatus of claim 13, wherein the memory and the at least one processor are further configured to: choose to receive the data transmission from the base station using the first reception beam based on the data transmission being in the control region of the slot. ### Claim 28 (depends on 27) The apparatus of claim 27, wherein the memory and the at least one processor are further configured to: determine that the data transmission from the base station has at least one symbol that overlaps with the control region of the slot. ### Claim 29 An apparatus for wireless communication at a user equipment (UE), comprising: means for receiving a control transmission from a base station in a control region of a slot, wherein the UE receives the control transmission using a first reception beam; and means for receiving a data transmission from the base station using a reception beam based on whether the data transmission is received in the control region of the slot or a data region of the slot, wherein the UE receives the data transmission using the first reception beam when the data transmission is in the control region of the slot and using a second reception beam when the data transmission is in the data region of the slot. ### Claim 30 (depends on 29) The apparatus of claim 29, further comprising: means for choosing to receive the data transmission from the base station using the first reception beam based on the data transmission being in the control region of the slot. ### Claim 31 (depends on 30) The apparatus of claim 30, further comprising: means for determining that the data transmission from the base station has at least one symbol that overlaps with the control region of the slot. ### Claim 32 A non-transitory computer-readable storage medium storing computer executable code for wireless communication at a user equipment (UE), the code when executed by a processor cause the processor to: receive a control transmission from a base station in a control region of a slot, wherein the UE receives the control transmission using a first reception beam; and receive a data transmission from the base station using a reception beam based on whether the data transmission is received in the control region of the slot or a data region of the slot, wherein the UE receives the data transmission using the first reception beam when the data transmission is in the control region of the slot and using a second reception beam when the data transmission is in the data region of the slot. ### Claim 33 (depends on 32) The computer-readable storage medium of claim 32, further comprising code that when executed by the processor cause the processor to: choose to receive the data transmission from the base station using the first reception beam based on the data transmission being in the control region of the slot. ### Claim 34 (depends on 33) The computer-readable storage medium of claim 33, further comprising code that when executed by the processor cause the processor to: determine that the data transmission from the base station has at least one symbol that overlaps with the control region of the slot.