# US 10,873,386 B2 · Signaling of UE intra/inter-panel beam switch latency > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,873,386 B2 - Document ID: US10873386B2 - Status: Granted - Kind: B2 - Application number: 16/259,188 - Filed: 2019-01-28 - Published: 2019-08-22 - Granted: 2020-12-22 - Earliest claimed: 2018-02-21 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Yan Zhou; Tao Luo; Valentin Alexandru Gheorghiu; Ruhua He - Web page: https://patentgrep.com/patent/US10873386B2 ## CPC - H04B 7/088: {using beam selection} - H04B 7/0626: {Channel coefficients, e.g. channel state information [CSI]} - H04B 7/0805: {with single receiver and antenna switching (H04B7/0822 takes precedence)} - H04B 7/0877: {switching off a diversity branch, e.g. to save power} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 52/0229: {where the received signal is a wanted signal} - H04W 52/028: {switching on or off only a part of the equipment circuit blocks} - H04W 72/046: {the resource being in the space domain, e.g. beams} - H04W 72/20: Control channels or signalling for resource management - H04W 72/542: using measured or perceived quality - H04B 7/022: Site diversity; Macro-diversity (using two or more spaced independent antennas H04B7/04) - H04B 7/0417: Feedback systems - 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 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals} - Y02D 30/70: in wireless communication networks - 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) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract Certain aspects of the present disclosure relate to methods and apparatus for signaling of UE intra/inter-panel beam switch latency using communications systems operating according to new radio (NR) technologies. For example, the method generally includes determining at least a first latency associated with a beam switch across at least first and second antenna array modules, wherein the first latency is greater than or equal to a second latency associated with a beam switch within the first or second antenna module, and signaling a second device an indication of when to assume the first latency for a beam switch at the first device. ## Claims ### Claim 1 A method for wireless communications by a first device, comprising: transmitting, from the first device to a second device, a first indication of first device's capability associated with beam switch latency, wherein the first indication includes a first beam switch latency; receiving, from the second device, a second indication triggering communication of one or more reference signals, wherein the second indication comprises a downlink control information (DCI), and the one or more reference signals comprise one or more aperiodic channel state information reference signals (A-CSI-RSs); and receiving, from the second device, the one or more reference signals after receiving the second indication, wherein a delay between receiving the second indication and the one or more reference signals is based on the first beam switch latency, wherein the first beam switch latency indicates a delay between the DCI and the one or more A-CSI-RSs. ### Claim 2 (depends on 1) The method of claim 1, wherein the first device includes a user equipment (UE), and wherein the second device includes a base station (BS). ### Claim 3 (depends on 1) The method of claim 1, wherein the beam switch includes reception beam switch in downlink receiving signal from the second device, or the beam switch includes transmission beam switch in uplink transmitting signal to the second device. ### Claim 4 (depends on 1) The method of claim 1, wherein the received one or more A-CSI-RSs are part of a P3 beam management. ### Claim 5 (depends on 4) The method of claim 4, wherein the received one or more A-CSI-RSs scheduled by the DCI. ### Claim 6 (depends on 4) The method of claim 4, wherein the first beam switch latency is fixed beam switch latency. ### Claim 7 (depends on 4) The method of claim 4, wherein the first beam switch latency is configurable beam switch latency. ### Claim 8 (depends on 5) The method of claim 5, wherein: the second device configures the first device with a plurality of active TCI states; and each PDSCH beam is determined based on an active TCI state. ### Claim 9 A method for wireless communications by a second device, comprising: receiving, from a first device, a first indication of first device's capability associated with beam switch latency, wherein the first indication includes a first beam switch latency; transmitting, from the second device to the first device, a second indication triggering communication of one or more reference signals, wherein the second indication comprises a downlink control information (DCI), and the one or more reference signals comprise one or more aperiodic channel state information reference signals (A-CSI-RSs); and transmitting, from the second device to the first device, the one or more reference signals after transmitting the second indication, wherein a delay between transmitting the second indication and the one or more reference signals is based on the first beam switch latency, wherein the first beam switch latency indicates a delay between the DCI and the one or more A-CSI-RSs. ### Claim 10 (depends on 9) The method of claim 9, wherein the first device includes a user equipment (UE), and wherein the second device includes a base station (BS). ### Claim 11 (depends on 9) The method of claim 9, wherein: the beam switch includes reception beam switch in downlink receiving signal from the second device, or the beam switch includes transmission beam switch in uplink transmitting signal to the second device. ### Claim 12 (depends on 9) The method of claim 9, wherein the transmitted one or more A-CSI-RSs are part of a P3 beam management. ### Claim 13 (depends on 12) The method of claim 12, wherein the transmitted one or more A-CSI-RSs scheduled by the DCI. ### Claim 14 (depends on 12) The method of claim 12, wherein the first beam switch latency is fixed beam switch latency. ### Claim 15 (depends on 12) The method of claim 12, wherein the first beam switch latency is configurable beam switch latency. ### Claim 16 An apparatus for wireless communications by a first device, comprising: at least one processor configured to: transmit, from the first device to a second device, a first indication of first device's capability associated with beam switch latency, wherein the first indication includes a first beam switch latency; receive, from the second device, a second indication triggering communication of one or more reference signals, wherein the second indication comprises a downlink control information (DCI), and the one or more reference signals comprise one or more aperiodic channel state information reference signals (A-CSI-RSs); and receive, from the second device, the one or more reference signals after receiving the second indication, wherein a delay between receiving the second indication and the one or more reference signals is based on the first beam switch latency, wherein the first beam switch latency indicates a delay between the DCI and the one or more A-CSI-RSs; and a memory coupled to the at least one processor. ### Claim 17 An apparatus for wireless communications by a second device, comprising: at least one processor configured to: receive, from a first device, a first indication of first device's capability associated with beam switch latency, wherein the first indication includes a first beam switch latency; transmit, from the second device to the first device, a second indication triggering communication of one or more reference signals, wherein the second indication comprises a downlink control information (DCI), and the one or more reference signals comprise one or more aperiodic channel state information reference signals (A-CSI-RSs); and transmit, from the second device to the first device, the one or more reference signals after transmitting the second indication, wherein a delay between transmitting the second indication and the one or more reference signals is based on the first beam switch latency, wherein the first beam switch latency indicates a delay between the DCI and the one or more A-CSI-RSs; and a memory coupled to the at least one processor. ### Claim 18 (depends on 16) The apparatus of claim 16, wherein the first device includes a user equipment (UE), and wherein the second device includes a base station (BS). ### Claim 19 (depends on 16) The apparatus of claim 16, wherein the beam switch includes reception beam switch in downlink receiving signal from the second device, or the beam switch includes transmission beam switch in uplink transmitting signal to the second device. ### Claim 20 (depends on 16) The apparatus of claim 16, wherein the received one or more A-CSI-RSs are part of a P3 beam management. ### Claim 21 (depends on 20) The apparatus of claim 20, wherein the received one or more A-CSI-RSs scheduled by the DCI. ### Claim 22 (depends on 20) The apparatus of claim 20, wherein the first beam switch latency is fixed beam switch latency. ### Claim 23 (depends on 20) The apparatus of claim 20, wherein the first beam switch latency is configurable beam switch latency. ### Claim 24 (depends on 17) The apparatus of claim 17, wherein the first device includes a user equipment (UE), and wherein the second device includes a base station (BS). ### Claim 25 (depends on 17) The apparatus of claim 17, wherein the beam switch includes reception beam switch in downlink receiving signal from the second device, or the beam switch includes transmission beam switch in uplink transmitting signal to the second device. ### Claim 26 (depends on 17) The apparatus of claim 17, wherein the received one or more A-CSI-RSs are part of a P3 beam management. ### Claim 27 (depends on 26) The apparatus of claim 26, wherein the received one or more A-CSI-RSs scheduled by the DCI. ### Claim 28 (depends on 26) The apparatus of claim 26, wherein the first beam switch latency is fixed beam switch latency. ### Claim 29 (depends on 26) The apparatus of claim 26, wherein the first beam switch latency is configurable beam switch latency.