# US 10,873,416 B2 · Techniques and apparatuses for determining uplink transmission timelines related to a channel state information reference signal (CSI-RS) > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,873,416 B2 - Document ID: US10873416B2 - Status: Granted - Kind: B2 - Application number: 16/406,694 - Filed: 2019-05-08 - Published: 2019-11-14 - Granted: 2020-12-22 - Earliest claimed: 2018-05-11 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Wooseok Nam; Alexandras Manolakos; Tao Luo; Peter Gaal; Joseph Binamira Soriaga - Web page: https://patentgrep.com/patent/US10873416B2 ## CPC - H04B 7/0647: {Variable feedback rate} - H04L 1/0026: {Transmission of channel quality indication} - H04B 7/06: at the transmitting station - H04B 7/0617: {for beam forming} - H04B 7/0695: {using beam selection} - H04L 1/0027: {Scheduling of signalling, e.g. occurrence thereof} - H04L 5/0023: {Time-frequency-space} - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0057: {Physical resource allocation for CQI} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04L 25/0226: {sounding signals per se} - H04W 8/24: Transfer of terminal data - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04W 56/001: {Synchronization between nodes} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/046: {the resource being in the space domain, e.g. beams} - H04W 72/121: for groups of terminals or users - H04W 72/1268: of uplink data flows - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04B: TRANSMISSION - 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 Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station (BS), a transmission of a channel state information reference signal (CSI-RS), wherein the transmission of the CSI-RS is received at least a quantity of symbols prior to a symbol of a scheduled uplink transmission from the UE. The UE may determine an uplink transmit beam for the scheduled uplink transmission based at least in part on receiving the transmission of the CSI-RS. Numerous other aspects are provided. ## Claims ### Claim 1 A method of wireless communication performed by a user equipment (UE), comprising: receiving, from a base station (BS), a transmission of a channel state information reference signal (CSI-RS), wherein the transmission of the CSI-RS is received at least a quantity of symbols prior to a symbol of a scheduled uplink transmission from the UE; receiving downlink control information (DCI) that includes a value in a channel state information (CSI) request field of the DCI, wherein the value in the CSI request field indicates a transmission configuration indication (TCI) state of the transmission of the CSI-RS; and determining an uplink transmit beam for the scheduled uplink transmission based at least in part on receiving the transmission of the CSI-RS and the TCI state of the transmission of the CSI-RS, wherein the transmission of the CSI-RS has a closest temporal proximity prior to the scheduled uplink transmission relative to one or more other transmissions of the CSI-RS. ### Claim 2 (depends on 1) The method of claim 1, wherein the CSI-RS is one of: an aperiodic CSI-RS (A-CSI-RS), a semi-persistent CSI-RS (SP-CSI-RS), or a periodic CSI-RS (P-CSI-RS). ### Claim 3 (depends on 1) The method of claim 1, wherein the CSI-RS is configured with repetition. ### Claim 4 (depends on 1) The method of claim 1, wherein receiving the transmission of the CSI-RS comprises: receiving the transmission of the CSI-RS in a same slot in which the scheduled uplink transmission is scheduled. ### Claim 5 (depends on 4) The method of claim 4, wherein determining the uplink transmit beam comprises: determining the uplink transmit beam during the same slot in which the transmission of the CSI-RS was received. ### Claim 6 (depends on 1) The method of claim 1, wherein receiving the transmission of the CSI-RS comprises: receiving the transmission of the CSI-RS in a slot prior to another slot in which the scheduled uplink transmission is scheduled. ### Claim 7 (depends on 6) The method of claim 6, wherein determining the uplink transmit beam comprises: determining the uplink transmit beam during the slot in which the transmission of the CSI-RS is received, or determining the uplink transmit beam during the other slot in which the scheduled uplink transmission is scheduled. ### Claim 8 (depends on 1) The method of claim 1, wherein determining the uplink transmit beam comprises: determining the uplink transmit beam based at least in part on a downlink receive beam via which the UE received the transmission of the CSI-RS. ### Claim 9 (depends on 1) The method of claim 1, further comprising: transmitting the scheduled uplink transmission via the determined uplink transmit beam. ### Claim 10 (depends on 1) The method of claim 1, further comprising: determining that the transmission of the CSI-RS and the one or more other transmissions of the CSI-RS were received within a time period based at least in part on receiving the transmission of the CSI-RS, wherein the transmission of the CSI-RS and the one or more other transmissions of the CSI-RS are associated with different TCI states; and wherein determining the uplink transmit beam comprises: determining the uplink transmit beam based at least in part on determining that the transmission of the CSI-RS and the one or more other transmissions of the CSI-RS were received within the time period. ### Claim 11 (depends on 1) The method of claim 1, wherein the scheduled uplink transmission includes: a physical uplink shared channel (PUSCH) transmission, a physical uplink control channel (PUCCH) transmission, or a sounding reference signal (SRS). ### Claim 12 (depends on 1) The method of claim 1, wherein the quantity of symbols is based at least in part on at least one of: a capability of the UE, or a configuration from the BS. ### Claim 13 (depends on 12) The method of claim 12, further comprising: receiving, in association with receiving the CSI-RS, the configuration from the BS based at least in part on receiving the CSI-RS; and determining, prior to determining the uplink transmit beam, that an uplink transmission is to be scheduled at least the quantity of symbols after the transmission of the CSI-RS is received based at least in part on receiving the configuration from the BS, wherein scheduling of the uplink transmission forms the scheduled uplink transmission. ### Claim 14 (depends on 1) The method of claim 1, wherein the quantity of symbols is a predetermined quantity of symbols. ### Claim 15 (depends on 14) The method of claim 14, further comprising: determining, prior to determining the uplink transmit beam, that an uplink transmission is to be scheduled the predetermined quantity of symbols after the symbol, wherein scheduling the uplink transmission forms the scheduled uplink transmission. ### Claim 16 (depends on 1) The method of claim 1, further comprising: determining that another scheduled uplink transmission is not scheduled for at least the quantity of symbols after the symbol, wherein the scheduled uplink transmission and the other scheduled uplink transmission are different; and determining another uplink transmit beam for the other scheduled uplink transmission based at least in part on determining that the other scheduled uplink transmission is not scheduled for at least the quantity of symbols after the symbol, wherein the uplink transmit beam and the other uplink transmit beam are different, wherein the other uplink transmit beam is determined based at least in part on: a previous transmission of the CSI-RS, or a most recently used uplink transmit beam relative to other uplink transmit beams. ### Claim 17 (depends on 1) The method of claim 1, further comprising: transmitting the scheduled uplink transmission to the BS at least the quantity of symbols after receiving the transmission of the CSI-RS based at least in part on determining that an uplink transmission is to be scheduled, wherein scheduling the uplink transmission forms the scheduled uplink transmission. ### Claim 18 A method of wireless communication performed by a base station (BS), comprising: transmitting, to a user equipment (UE), a transmission of a channel state information reference signal (CSI-RS), wherein the transmission of the CSI-RS is transmitted at least a quantity of symbols prior to a symbol of a scheduled uplink transmission from the UE; transmitting downlink control information (DCI) that includes a value in a channel state information (CSI) request field of the DCI, wherein the value in the CSI request field indicates a transmission configuration indication (TCI) state of the transmission of the CSI-RS; and determining an uplink receive beam for the scheduled uplink transmission based at least in part on transmitting the transmission of the CSI-RS and the TCI state of the transmission of the CSI-RS, wherein the transmission of the CSI-RS has a closest temporal proximity prior to the scheduled uplink transmission relative to one or more other transmissions of the CSI-RS. ### Claim 19 (depends on 18) The method of claim 18, wherein the CSI-RS is one of: an aperiodic CSI-RS (A-CSI-RS), a semi-persistent CSI-RS (SP-CSI-RS), or a periodic CSI-RS (P-CSI-RS). ### Claim 20 (depends on 18) The method of claim 18, wherein the CSI-RS is configured with repetition. ### Claim 21 (depends on 18) The method of claim 18, wherein transmitting the transmission of the CSI-RS comprises: transmitting the transmission of the CSI-RS in a same slot in which the scheduled uplink transmission is scheduled. ### Claim 22 (depends on 21) The method of claim 21, wherein determining the uplink receive beam comprises: determining the uplink receive beam during the same slot in which the scheduled uplink transmission is scheduled. ### Claim 23 (depends on 18) The method of claim 18, wherein transmitting the transmission of the CSI-RS comprises: transmitting the transmission of the CSI-RS in a slot prior to another slot in which the scheduled uplink transmission is scheduled. ### Claim 24 (depends on 23) The method of claim 23, wherein determining the uplink receive beam comprises: determining the uplink receive beam during the slot in which the transmission of the CSI-RS is transmitted, or determining the uplink receive beam during the other slot in which the scheduled uplink transmission is scheduled. ### Claim 25 (depends on 18) The method of claim 18, wherein determining the uplink receive beam comprises: determining the uplink receive beam based at least in part on a downlink transmit beam via which the BS transmitted the transmission of the CSI-RS. ### Claim 26 (depends on 18) The method of claim 18, further comprising: receiving the scheduled uplink transmission via the determined uplink receive beam. ### Claim 27 (depends on 18) The method of claim 18, further comprising: determining that the transmission of the CSI-RS and the one or more other transmissions of the CSI-RS were transmitted within a time period based at least in part on transmitting the transmission of the CSI-RS, wherein the transmission of the CSI-RS and the one or more other transmissions of the CSI-RS are associated with different TCI states; and wherein determining the uplink receive beam comprises: determining the uplink receive beam based at least in part on determining that the transmission of the CSI-RS and the one or more other transmissions of the CSI-RS were transmitted within the time period. ### Claim 28 (depends on 18) The method of claim 18, wherein the scheduled uplink transmission includes: a physical uplink shared channel (PUSCH) transmission, a physical uplink control channel (PUCCH) transmission, or a sounding reference signal (SRS). ### Claim 29 (depends on 18) The method of claim 18, wherein the quantity of symbols is based at least in part on at least one of: a capability of the UE, or a configuration from the BS. ### Claim 30 (depends on 29) The method of claim 29, further comprising: transmitting the configuration to the UE based at least in part on transmitting the CSI-RS; and determining, prior to determining the uplink receive beam, that an uplink transmission is to be scheduled at least the quantity of symbols after the transmission of the CSI-RS is transmitted based at least in part on transmitting the configuration to the UE, wherein scheduling the uplink transmission forms the scheduled uplink transmission. ### Claim 31 (depends on 18) The method of claim 18, wherein the quantity of symbols is a predetermined quantity of symbols. ### Claim 32 (depends on 31) The method of claim 31, further comprising: determining, prior to determining the uplink receive beam, that an uplink transmission is to be scheduled the predetermined quantity of symbols after the symbol, wherein scheduling the uplink transmission forms the scheduled uplink transmission. ### Claim 33 (depends on 18) The method of claim 18, further comprising: determining that another scheduled uplink transmission is not scheduled for at least the quantity of symbols after the symbol, wherein the scheduled uplink transmission and the other scheduled uplink transmission are different; and determining another uplink receive beam for the other scheduled uplink transmission based at least in part on determining that the other scheduled uplink transmission is not scheduled for at least the quantity of symbols after the symbol, wherein the uplink receive beam and the other uplink receive beam are different, wherein the other uplink receive beam is determined based at least in part on: a previous transmission of the CSI-RS, or a most recently used uplink receive beam relative to other uplink receive beams. ### Claim 34 (depends on 18) The method of claim 18, further comprising: receiving the scheduled uplink transmission at least the quantity of symbols after receiving the transmission of the CSI-RS based at least in part on determining that an uplink transmission is to be scheduled, wherein scheduling the uplink transmission forms the scheduled uplink transmission. ### Claim 35 A user equipment (UE) for wireless communication, comprising: a memory; and one or more processors coupled to the memory, the memory and the one or more processors configured to: receive, from a base station (BS), a transmission of a channel state information reference signal (CSI-RS), wherein the transmission of the CSI-RS is received at least a quantity of symbols prior to a symbol of a scheduled uplink transmission from the UE; receive downlink control information (DCI) that includes a value in a channel state information (CSI) request field of the DCI, wherein the value in the CSI request field indicates a transmission configuration indication (TCI) state of the transmission of the CSI-RS; and determine an uplink transmit beam for the scheduled uplink transmission based at least in part on receiving the transmission of the CSI-RS and the TCI state of the transmission of the CSI-RS, wherein the transmission of the CSI-RS has a closest temporal proximity prior to the scheduled uplink transmission relative to one or more other transmissions of the CSI-RS. ### Claim 36 (depends on 35) The UE of claim 35, wherein the one or more processors, when determining the uplink transmit beam, are configured to: determine the uplink transmit beam during a same slot in which the transmission of the CSI-RS was received. ### Claim 37 (depends on 35) The UE of claim 35, wherein the one or more processors, when receiving the transmission of the CSI-RS, are configured to: receive the transmission of the CSI-RS in a slot prior to another slot in which the scheduled uplink transmission is scheduled. ### Claim 38 (depends on 37) The UE of claim 37, wherein the one or more processors, when determining the uplink transmit beam, are configured to: determine the uplink transmit beam during the slot in which the transmission of the CSI-RS is received, or determine the uplink transmit beam during the other slot in which the scheduled uplink transmission is scheduled. ### Claim 39 (depends on 35) The UE of claim 35, wherein the one or more processors, when determining the uplink transmit beam, are configured to: determine the uplink transmit beam based at least in part on a downlink receive beam via which the UE received the transmission of the CSI-RS. ### Claim 40 (depends on 35) The UE of claim 35, wherein the one or more processors are further configured to: determine that the transmission of the CSI-RS and the one or more other transmissions of the CSI-RS were received within a time period based at least in part on receiving the transmission of the CSI-RS, wherein the transmission of the CSI-RS and the one or more other transmissions of the CSI-RS are associated with different TCI states; and wherein the one or more processors, when determining the uplink transmit beam, are configured to: determine the uplink transmit beam based at least in part on determining that the transmission of the CSI-RS and the one or more other transmissions of the CSI-RS were received within the time period. ### Claim 41 (depends on 35) The UE of claim 35, wherein the one or more processors are further configured to: receive, in association with receiving the CSI-RS, a configuration from the BS based at least in part on receiving the CSI-RS; and determine, prior to determining the uplink transmit beam, that an uplink transmission is to be scheduled at least the quantity of symbols after the transmission of the CSI-RS is received based at least in part on receiving the configuration from the BS, wherein scheduling of the uplink transmission forms the scheduled uplink transmission. ### Claim 42 (depends on 35) The UE of claim 35, wherein the one or more processors are further configured to: determine that another scheduled uplink transmission is not scheduled for at least the quantity of symbols after the symbol, wherein the scheduled uplink transmission and the other scheduled uplink transmission are different; and determine another uplink transmit beam for the other scheduled uplink transmission based at least in part on determining that the other scheduled uplink transmission is not scheduled for at least the quantity of symbols after the symbol, wherein the uplink transmit beam and the other uplink transmit beam are different, wherein the other uplink transmit beam is determined based at least in part on: a previous transmission of the CSI-RS, or a most recently used uplink transmit beam relative to other uplink transmit beams. ### Claim 43 (depends on 35) The UE of claim 35, wherein the one or more processors are further configured to: transmit the scheduled uplink transmission to the BS at least the quantity of symbols after receiving the transmission of the CSI-RS based at least in part on determining that an uplink transmission is to be scheduled, wherein scheduling the uplink transmission forms the scheduled uplink transmission. ### Claim 44 (depends on 35) The UE of claim 35, wherein, wherein the CSI-RS is one of: an aperiodic CSI-RS (A-CSI-RS), a semi-persistent CSI-RS (SP-CSI-RS), or a periodic CSI-RS (P-CSI-RS). ### Claim 45 (depends on 35) The UE of claim 35, wherein the CSI-RS is configured with repetition. ### Claim 46 A base station (BS) for wireless communication, comprising: a memory; and one or more processors coupled to the memory, the memory and the one or more processors configured to: transmit, to a user equipment (UE), a transmission of a channel state information reference signal (CSI-RS), wherein the transmission of the CSI-RS is transmitted at least a quantity of symbols prior to a symbol of a scheduled uplink transmission from the UE; transmit downlink control information (DCI) that includes a value in a channel state information (CSI) request field of the DCI, wherein the value in the CSI request field indicates a transmission configuration indication (TCI) state of the transmission of the CSI-RS; and determine an uplink receive beam for the scheduled uplink transmission based at least in part on transmitting the transmission of the CSI-RS and the TCI state of the transmission of the CSI-RS, wherein the transmission of the CSI-RS has a closest temporal proximity prior to the scheduled uplink transmission relative to other transmissions of the CSI-RS. ### Claim 47 (depends on 46) The BS of claim 46, wherein the one or more processors, when determining the uplink receive beam, are configured to: determine the uplink receive beam during a same slot in which the scheduled uplink transmission is scheduled. ### Claim 48 (depends on 46) The BS of claim 46, wherein the one or more processors, when transmitting the transmission of the CSI-RS, are configured to: transmit the transmission of the CSI-RS in a slot prior to another slot in which the scheduled uplink transmission is scheduled. ### Claim 49 (depends on 48) The BS of claim 48, wherein the one or more processors, when determining the uplink receive beam, are configured to: determine the uplink receive beam during the slot in which the transmission of the CSI-RS is transmitted, or determine the uplink receive beam during the other slot in which the scheduled uplink transmission is scheduled. ### Claim 50 (depends on 46) The BS of claim 46, wherein the one or more processors, when determining the uplink receive beam, are configured to: determine the uplink receive beam based at least in part on a downlink transmit beam via which the BS transmitted the transmission of the CSI-RS. ### Claim 51 (depends on 46) The BS of claim 46, wherein the one or more processors are further configured to: determine that the transmission of the CSI-RS and the one or more other transmissions of the CSI-RS were transmitted within a time period based at least in part on transmitting the transmission of the CSI-RS, wherein the transmission of the CSI-RS and the one or more other transmissions of the CSI-RS are associated with different TCI states; and wherein the one or more processors, when determining the uplink receive beam, are configured to: determine the uplink receive beam based at least in part on determining that the transmission of the CSI-RS and the one or more other transmissions of the CSI-RS were transmitted within the time period. ### Claim 52 (depends on 46) The BS of claim 46, wherein the one or more processors are further configured to: transmit the configuration to the UE based at least in part on transmitting the CSI-RS; and determine, prior to determining the uplink receive beam, that an uplink transmission is to be scheduled at least the quantity of symbols after the transmission of the CSI-RS is transmitted based at least in part on transmitting the configuration to the UE, wherein scheduling the uplink transmission forms the scheduled uplink transmission. ### Claim 53 (depends on 46) The BS of claim 46, wherein the one or more processors are further configured to: determine that another scheduled uplink transmission is not scheduled for at least the quantity of symbols after the symbol, wherein the scheduled uplink transmission and the other scheduled uplink transmission are different; and determine another uplink receive beam for the other scheduled uplink transmission based at least in part on determining that the other scheduled uplink transmission is not scheduled for at least the quantity of symbols after the symbol, wherein the uplink receive beam and the other uplink receive beam are different, wherein the other uplink receive beam is determined based at least in part on: a previous transmission of the CSI-RS, or a most recently used uplink receive beam relative to other uplink receive beams. ### Claim 54 (depends on 46) The BS of claim 46, wherein the one or more processors are further configured to: receive the scheduled uplink transmission at least the quantity of symbols after the symbol based at least in part on determining that an uplink transmission is to be scheduled at least the quantity of symbols after the symbol, wherein scheduling the uplink transmission forms the scheduled uplink transmission. ### Claim 55 (depends on 46) The BS of claim 46, wherein, wherein the CSI-RS is one of: an aperiodic CSI-RS (A-CSI-RS), a semi-persistent CSI-RS (SP-CSI-RS), or a periodic CSI-RS (P-CSI-RS). ### Claim 56 (depends on 46) The BS of claim 46, wherein the CSI-RS is configured with repetition.