# US 11,444,735 B2 · Techniques for using a data channel for beam refinement > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,444,735 B2 - Document ID: US11444735B2 - Status: Granted - Kind: B2 - Application number: 17/144,841 - Filed: 2021-01-08 - Published: 2021-12-16 - Granted: 2022-09-13 - Earliest claimed: 2020-06-15 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Vasanthan Raghavan; Junyi Li; Juergen Cezanne - Web page: https://patentgrep.com/patent/US11444735B2 ## CPC - H04B 7/088: {using beam selection} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04B 7/0417: Feedback systems - H04B 7/06958: {Multistage beam selection, e.g. beam refinement} - 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 5/0082: {at predetermined intervals} - H04L 5/0091: {Signalling for the administration of the divided path, e.g. signalling of configuration information} - H04W 72/044: based on the type of the allocated resource - H04L 5/001: {the frequencies being arranged in component carriers} - H04L 5/1469: {using time-sharing} - H04L 5/16: Half-duplex systems; Simplex/duplex switching; Transmission of break signals {non-automatically inverting the direction of transmission} - 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 Methods, systems, and devices for wireless communications are described. For example, a first wireless device may transmit, via a first beam, a first set of data and a first reference signal associated with the data on a data channel for beam refinement. The first wireless device may further transmit, via a second beam, a second set of data and a second reference signal on the data channel for beam refinement. A second device may receive the first set of data and first reference signal in addition to receiving the second set of data and second reference signal. The second device may transmit, to the first device, beam refinement feedback information for the first beam and the second beam based on receiving the first reference signal and the second reference signal on the data channel. Thus, the first device may refine beams based on a data transmission over a data channel. ## Claims ### Claim 1 A method for wireless communications at a first wireless device, comprising: transmitting, via a first beam and in a first set of symbols, a first set of data and a first reference signal associated with the first set of data on a data channel, wherein the first reference signal is for beam refinement; transmitting, via a second beam and in a second set of symbols, a second set of data and a second reference signal on the data channel, wherein the second reference signal is for the beam refinement; and receiving, from a second wireless device, beam refinement feedback information for the first beam and the second beam based at least in part on transmitting the first reference signal and the second reference signal on the data channel. ### Claim 2 (depends on 1) The method of claim 1, further comprising: receiving an indication to perform the beam refinement, wherein transmitting the first reference signal and the second reference signal is based at least in part on the indication. ### Claim 3 (depends on 2) The method of claim 2, further comprising: transmitting a modulation and coding scheme request for adjusting a modulation and coding scheme based at least in part on receiving the indication to perform the beam refinement. ### Claim 4 (depends on 1) The method of claim 1, further comprising: receiving a beam sweep configuration for dynamic beam refinement procedures using the data channel. ### Claim 5 (depends on 4) The method of claim 4, wherein the beam sweep configuration indicates a data channel slot structure for the beam refinement using the first reference signal and the second reference signal. ### Claim 6 (depends on 4) The method of claim 4, wherein the beam sweep configuration indicates a number of beams to sweep for the beam refinement. ### Claim 7 (depends on 1) The method of claim 1, wherein the first reference signal and the second reference signal are each transmitted with a slot time interval of the data channel. ### Claim 8 (depends on 1) The method of claim 1, further comprising: selecting the first beam or the second beam for subsequent communication based at least in part on the received beam refinement feedback information. ### Claim 9 (depends on 1) The method of claim 1, wherein the beam refinement feedback information is received via a control information message, a radio resource control message, or a medium access control-control element. ### Claim 10 (depends on 1) The method of claim 1, wherein the first reference signal and the second reference signal comprise demodulation reference signals. ### Claim 11 (depends on 1) The method of claim 1, wherein the first wireless device is a user equipment, and wherein the data channel is a physical uplink shared channel. ### Claim 12 (depends on 1) The method of claim 1, wherein the first wireless device is a network node, and wherein the data channel is a physical downlink shared channel. ### Claim 13 A method for wireless communications at a second wireless device, comprising: receiving, via a first beam of a first wireless device and in a first set of symbols, a first set of data and a first reference signal associated with the first set of data on a data channel, wherein the first reference signal is for beam refinement; receiving, via a second beam of the first wireless device and in a second set of symbols, a second set of data and a second reference signal on the data channel, wherein the second reference signal is for the beam refinement; and transmitting, to the first wireless device, beam refinement feedback information for the first beam and the second beam based at least in part on receiving the first reference signal and the second reference signal on the data channel. ### Claim 14 (depends on 13) The method of claim 13, further comprising: measuring a first reference signal received power of the first reference signal; and measuring a second reference signal received power of the second reference signal. ### Claim 15 (depends on 14) The method of claim 14, wherein the beam refinement feedback information comprises an indication of the first reference signal received power and the second reference signal received power. ### Claim 16 (depends on 14) The method of claim 14, wherein the beam refinement feedback information comprises an indication that the first beam is a preferred beam based at least on part on the first reference signal received power being greater than the second reference signal received power. ### Claim 17 (depends on 13) The method of claim 13, further comprising: receiving a feedback configuration for reporting beam feedback associated with the beam refinement via the data channel. ### Claim 18 (depends on 13) The method of claim 13, further comprising: transmitting an indication to perform the beam refinement. ### Claim 19 (depends on 18) The method of claim 18, further comprising: receiving a modulation and coding scheme request for adjusting a modulation and coding scheme based at least in part on transmitting the indication to perform the beam refinement. ### Claim 20 (depends on 13) The method of claim 13, further comprising: transmitting a beam sweep configuration for dynamic beam refinement procedures using the data channel. ### Claim 21 (depends on 20) The method of claim 20, wherein the beam sweep configuration indicates a data channel slot structure for the beam refinement using the first reference signal and the second reference signal. ### Claim 22 (depends on 20) The method of claim 20, wherein the beam sweep configuration indicates a number of beams to sweep for the beam refinement. ### Claim 23 (depends on 13) The method of claim 13, wherein the first reference signal and the second reference signal are each received within a slot time interval of the data channel. ### Claim 24 (depends on 13) The method of claim 13, wherein the beam refinement feedback information is transmitted via a control information message, a radio resource control message, or a medium access control-control element. ### Claim 25 (depends on 13) The method of claim 13, wherein the first reference signal and the second reference signal are demodulation reference signals. ### Claim 26 (depends on 13) The method of claim 13, wherein: the second wireless device is a user equipment and the data channel is a physical downlink shared channel; or the second wireless device is a network node and the data channel is a physical uplink shared channel. ### Claim 27 An apparatus for wireless communications at a first wireless device, comprising: a processor, memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: transmit, via a first beam and in a first set of symbols, a first set of data and a first reference signal associated with the first set of data on a data channel, wherein the first reference signal is for beam refinement; transmit, via a second beam and in a second set of symbols, a second set of data and a second reference signal on the data channel, wherein the second reference signal is for the beam refinement; and receive, from a second wireless device, beam refinement feedback information for the first beam and the second beam based at least in part on transmitting the first reference signal and the second reference signal on the data channel. ### Claim 28 An apparatus for wireless communications at a second wireless device, comprising: a processor, memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: receive, via a first beam of a first wireless device and in a first set of symbols, a first set of data and a first reference signal associated with the first set of data on a data channel, wherein the first reference signal is for beam refinement; receive, via a second beam of the first wireless device and in a second set of symbols, a second set of data and a second reference signal on the data channel, wherein the second reference signal is for the beam refinement; and transmit, to the first wireless device, beam refinement feedback information for the first beam and the second beam based at least in part on receiving the first reference signal and the second reference signal on the data channel.