# US 12,113,602 B2 · Beam changing for a repeater node > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,113,602 B2 - Document ID: US12113602B2 - Status: Granted - Kind: B2 - Application number: 18/156,792 - Filed: 2023-01-19 - Published: 2023-07-20 - Granted: 2024-10-08 - Earliest claimed: 2021-03-23 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Muhammad Nazmul Islam; Navid Abedini; Junyi Li; Ori Shental - Web page: https://patentgrep.com/patent/US12113602B2 ## CPC - H04B 7/0617: {for beam forming} - H04B 7/1555: {Selecting relay station antenna mode, e.g. selecting omnidirectional -, directional beams, selecting polarizations} - H04B 7/0621: {Feedback content} - H04B 7/06952: {Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping} - H04B 7/15528: {Control of operation parameters of a relay station to exploit the physical medium} - H04L 5/0098: {Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands} - H04L 27/2666: {Acquisition of further OFDM parameters, e.g. bandwidth, subcarrier spacing, or guard interval length} - H04W 72/046: {the resource being in the space domain, e.g. beams} - 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 This disclosure provides systems, apparatus, methods, and computer-readable media for beam switching by a repeater node that forwards communications from one of a first node or a second node to the other of the first node or the second node. For example, after a change of position by the second node, the first node may provide the repeater node an instruction to perform a beam change operation to communicate with the second node. In some aspects, performing the beam change operation by the repeater node may improve reliability of wireless communications, such as by focusing signal energy in a particular direction. Further, a beam change delay time interval or a scheduling of the beam change delay time interval may be selected based on scheduling associated with other nodes, which may reduce a number of messages sent to the repeater node (such as by reducing instructions to change beam directions). ## Claims ### Claim 1 A method for wireless communication by a repeater node, comprising: relaying a first message using a first beam, the first message being relayed from a first node to a second node or from the second node to the first node; receiving an instruction to perform a beam change operation from the first beam to a second beam, the beam change operation being associated with a beam change delay time interval that is less than or equal to a threshold beam change delay time interval; and relaying, from one of the first node or the second node to the other of the first node or the second node, a second message using the second beam. ### Claim 2 (depends on 1) The method of claim 1, the beam change delay time interval being associated with one or more of: a first subcarrier spacing (SCS) of a first link associated with the repeater node and the first node, a second SCS of a second link associated with the repeater node and the second node prior to the beam change operation, or a third SCS of the second link after the beam change operation. ### Claim 3 (depends on 2) The method of claim 2, wherein the first SCS is associated with a first beam change delay, wherein the second SCS is associated with a second beam change delay, wherein the third SCS is associated with a third beam change delay, and wherein the beam change delay time interval is selected from among the first beam change delay, the second beam change delay, and the third beam change delay. ### Claim 4 (depends on 1) The method of claim 1, further comprising receiving a configuration message indicating the threshold beam change delay time interval, the threshold beam change delay time interval being associated with a subcarrier spacing (SCS). ### Claim 5 (depends on 4) The method of claim 4, further comprising transmitting a message indicating a beam change delay capability associated with the repeater node, wherein the threshold beam change delay time interval is associated with the beam change delay capability and with the SCS. ### Claim 6 (depends on 1) The method of claim 1, wherein the threshold beam change delay time interval is associated with a plurality of threshold beam change delay time intervals associated with a plurality of repeater nodes that includes the repeater node and at least one other repeater node. ### Claim 7 (depends on 1) The method of claim 1, wherein the threshold beam change delay time interval is common to a plurality of repeater nodes that includes the repeater node and at least one other repeater node. ### Claim 8 (depends on 1) The method of claim 1, further comprising: receiving a first downlink control information (DCI) message, wherein the first DCI message indicates the beam change delay time interval, the beam change delay time interval being associated with the repeater node; receiving a second DCI message, wherein the second DCI message indicates a second beam change delay time interval associated with the first node or the second node and that is less than the beam change delay time interval; and forwarding the second DCI message to the first node or the second node, wherein the beam change operation is performed in accordance with the beam change delay time interval. ### Claim 9 (depends on 8) The method of claim 8, wherein the first DCI message includes the instruction to perform the beam change operation. ### Claim 10 (depends on 8) The method of claim 8, further comprising transmitting a message indicating a beam change delay capability associated with the repeater node, wherein the beam change delay capability corresponds to a difference between the beam change delay time interval and the second beam change delay time interval. ### Claim 11 (depends on 1) The method of claim 1, wherein the instruction is of a dynamic scheduling type that indicates to perform the beam change operation dynamically. ### Claim 12 (depends on 1) The method of claim 1, wherein the instruction is of a semi-static scheduling type that indicates to perform the beam change operation semi-statically. ### Claim 13 (depends on 1) The method of claim 1, wherein the repeater node is in communication with multiple user equipments (UEs), and wherein each UE of the multiple UEs is associated with one or both of a respective beam or a respective scheduling type. ### Claim 14 (depends on 13) The method of claim 13, wherein the instruction indicates to perform the beam change operation semi-statically according to a scheduling pattern associated with the multiple UEs. ### Claim 15 (depends on 1) The method of claim 1, wherein the instruction is included in a downlink control information (DCI) message, a medium access control (MAC) control element (MAC-CE), or a radio resource control (RRC) signal. ### Claim 16 (depends on 1) The method of claim 1, further comprising, during the beam change delay time interval associated with the beam change operation, communicating using the first beam. ### Claim 17 (depends on 1) The method of claim 1, further comprising: during the beam change delay time interval associated with the beam change operation, buffering one or more messages from one of the first node or the second node; and after performing the beam change operation, transmitting the one or more messages to the other of the first node or the second node using the second beam. ### Claim 18 (depends on 1) The method of claim 1, the repeater node being included in a multi-hop network that includes at least a second repeater node, and the beam change delay time interval being different than a second beam change delay time interval associated with the second repeater node. ### Claim 19 (depends on 1) The method of claim 1, wherein the repeater node is included in a multi-hop network that includes at least a second repeater node, and wherein a first scheduling associated with the repeater node is different than a second scheduling associated with the second repeater node. ### Claim 20 (depends on 19) The method of claim 19, wherein the first scheduling is one of a periodic type or a semi-static type, and wherein the second scheduling is one of the periodic type or the semi-static type. ### Claim 21 (depends on 19) The method of claim 19, wherein the first scheduling is applied to first downlink transmit beams or first uplink receive beams associated with the repeater node, and wherein the second scheduling is applied to second downlink transmit beams or second uplink receive beams associated with the second repeater node. ### Claim 22 A repeater node for wireless communication, comprising: a transmitter; and a receiver configured to: receive an instruction to perform a beam change operation from a first beam to a second beam, the beam change operation being associated with a beam change delay time interval that is less than or equal to a threshold beam change delay time interval, one or more of the transmitter or the receiver being configured to relay a first message using the first beam from a first node to a second node or from the second node to the first node and to relay, from one of the first node or the second node to the other of the first node or the second node, a second message using the second beam. ### Claim 23 (depends on 22) The repeater node of claim 22, wherein the repeater node and the first node are associated with a first link, and wherein the first link corresponds to an access link or a fronthaul link. ### Claim 24 (depends on 22) The repeater node of claim 22, wherein the repeater node and the second node are associated with a second link, and wherein the second link corresponds to a fronthaul link or an access link. ### Claim 25 (depends on 22) The repeater node of claim 22, wherein the first node corresponds to at least one of: a user equipment (UE); a repeater node; a distributed unit (DU); a base station; a parent node; or a central unit (CU). ### Claim 26 (depends on 22) The repeater node of claim 22, wherein the second node corresponds to at least one of: a user equipment (UE); a repeater node; a distributed unit (DU); a base station; a parent node; or a central unit (CU). ### Claim 27 A method for wireless communication by a first node, comprising: receiving, from a second node via a repeater node, one or more signals associated with the second node; and transmitting, to the repeater node, an instruction for the repeater node to perform a beam change operation, the beam change operation being associated with a beam change delay time interval that is less than or equal to a threshold beam change delay time interval. ### Claim 28 (depends on 27) The method of claim 27, wherein the instruction is of one of a dynamic scheduling type that indicates to perform the beam change operation dynamically or a semi-static scheduling type that indicates to perform the beam change operation semi-statically. ### Claim 29 An apparatus for wireless communication, comprising: a receiver configured to receive, via a repeater node from a second node, one or more signals associated with the second node; and a transmitter configured to transmit, to the repeater node, an instruction for the repeater node to perform a beam change operation, the beam change operation being associated with a beam change delay time interval that is less than or equal to a threshold beam change delay time interval. ### Claim 30 (depends on 29) The apparatus of claim 29, wherein the instruction is of one of a dynamic scheduling type that indicates to perform the beam change operation dynamically or a semi-static scheduling type that indicates to perform the beam change operation semi-statically.