# US 12,225,482 B2 · Using automatic gain control to indicate target sidelink receiving UE > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,225,482 B2 - Document ID: US12225482B2 - Status: Granted - Kind: B2 - Application number: 17/650,782 - Filed: 2022-02-11 - Published: 2023-08-17 - Granted: 2025-02-11 - Earliest claimed: 2022-02-11 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Jung Ho Ryu; Sony Akkarakaran; Tao Luo; Junyi Li; Kobi Ravid - Web page: https://patentgrep.com/patent/US12225482B2 ## CPC - H04W 52/52: using AGC [Automatic Gain Control] circuits or amplifiers - 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 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 27/2607: {Cyclic extensions} - H04L 27/2613: {Structure of the reference signals} - H04W 72/02: Selection of wireless resources by user or terminal - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Aspects are provided which allow AGC symbols to be applied for identifying or indicating target Rx UEs of sidelink communications from Tx UEs. A Tx UE transmits an AGC signal to a Rx UE in a RB associated with the Rx UE. The Rx UE receives the AGC signal from the Tx UE. The Tx UE transmits sidelink data to the Rx UE after the AGC signal. The Rx UE decodes sidelink data from the Tx UE in response to the AGC signal being received in a RB associated with the Rx UE. The Rx UE refrains from decoding the sidelink data from the Tx UE in response to the AGC signal being received in a different RB than the RB associated with the Rx UE. In this way, Rx UEs may save monitoring and processing power and time in receiving and decoding sidelink communications. ## Claims ### Claim 1 A method of wireless communication at a first user equipment (UE), comprising: transmitting an automatic gain control (AGC) signal in an AGC symbol to a second UE, the AGC symbol indicating that the second UE is a target of a sidelink communication based on a correspondence of the second UE with a frequency domain location of a resource block (RB including the AGC signal; and transmitting sidelink data in the sidelink communication to the second UE after the AGC signal. ### Claim 2 (depends on 1) The method of claim 1, wherein the RB is a function of an identifier of the second UE. ### Claim 3 (depends on 2) The method of claim 2, wherein the RB is also a function of an identifier of the first UE. ### Claim 4 (depends on 1) The method of claim 1, wherein the RB is one of a plurality of RBs in a sidelink transmission resource pool. ### Claim 5 (depends on 4) The method of claim 4, wherein the RB is a function of a quantity of the RBs in the sidelink transmission resource pool. ### Claim 6 (depends on 1) The method of claim 1, wherein the RB is one of a plurality of RBs in a designated set of RBs for AGC signals indicating sidelink UEs. ### Claim 7 (depends on 6) The method of claim 6, wherein the RB is a function of a quantity of the RBs in the designated set of RBs. ### Claim 8 (depends on 1) The method of claim 1, wherein the AGC signal and the sidelink data are transmitted in a mini-slot. ### Claim 9 (depends on 1) The method of claim 1, wherein the sidelink data is transmitted in a mini-slot, and the AGC signal is transmitted prior to the mini-slot in a first symbol of a slot including the mini-slot. ### Claim 10 (depends on 9) The method of claim 9, wherein the AGC signal includes a sequence indicating the mini-slot. ### Claim 11 (depends on 10) The method of claim 10, wherein the sequence includes a cyclic shift associated with an index for the mini-slot. ### Claim 12 (depends on 9) The method of claim 9, further comprising: transmitting another AGC signal to a third UE, wherein the another AGC signal is transmitted in another RB associated with the third UE, and the RB and the another RB are within the first symbol of the slot; and transmitting another sidelink data to the third UE after the another AGC signal, wherein the another sidelink data is transmitted in another mini-slot. ### Claim 13 (depends on 12) The method of claim 12, wherein the AGC signal includes a cyclic shift associated with the mini-slot, and the another AGC signal includes another cyclic shift associated with the another mini-slot. ### Claim 14 An apparatus for wireless communication, comprising: a processor; memory coupled with the processor; and instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to: transmit an automatic gain control (AGC) signal in an AGC symbol to a user equipment (UE), the AGC symbol indicating that the UE is a target of a sidelink communication based on a correspondence of the UE with a frequency domain location of a resource block (RB) including the AGC signal; and transmit sidelink data in the sidelink communication to the UE after the AGC signal. ### Claim 15 (depends on 14) The apparatus of claim 14, wherein the sidelink data is transmitted in a mini-slot, and the AGC signal is transmitted prior to the mini-slot in a first symbol of a slot including the mini-slot. ### Claim 16 (depends on 15) The apparatus of claim 15, wherein the instructions, when executed by the processor, further cause the apparatus to: transmit another AGC signal to a second UE, wherein the another AGC signal is transmitted in another RB associated with the second UE, and the RB and the another RB are within the first symbol of the slot; and transmit another sidelink data to the second UE after the another AGC signal, wherein the another sidelink data is transmitted in another mini-slot. ### Claim 17 A method of wireless communication at a first user equipment (UE), comprising: receiving an automatic gain control (AGC) signal in an AGC symbol from a second UE, the AGC symbol indicating that the first UE is a target of a sidelink communication based on a correspondence of the first UE with a frequency domain location of a resource block (RB) including the AGC signal; and decoding sidelink data in the sidelink communication from the second UE in response to the AGC signal. ### Claim 18 (depends on 17) The method of claim 17, wherein the RB is a function of an identifier of the first UE. ### Claim 19 (depends on 18) The method of claim 18, wherein the RB is also a function of an identifier of the second UE. ### Claim 20 (depends on 17) The method of claim 17, wherein the RB is one of a plurality of RBs in a sidelink transmission resource pool. ### Claim 21 (depends on 20) The method of claim 20, wherein the RB is a function of a quantity of the RBs in the sidelink transmission resource pool. ### Claim 22 (depends on 17) The method of claim 17, wherein the RB is one of a plurality of RBs in a designated set of RBs for AGC signals indicating sidelink UEs. ### Claim 23 (depends on 22) The method of claim 22, wherein the RB is a function of a quantity of the RBs in the designated set of RBs. ### Claim 24 (depends on 17) The method of claim 17, wherein the AGC signal and the sidelink data are received in a mini-slot. ### Claim 25 (depends on 17) The method of claim 17, wherein the sidelink data is received in a mini-slot, and the AGC signal is received prior to the mini-slot in a first symbol of a slot including the mini-slot. ### Claim 26 (depends on 25) The method of claim 25, wherein the AGC signal includes a sequence indicating the mini-slot. ### Claim 27 (depends on 26) The method of claim 26, wherein the sequence includes a cyclic shift associated with an index for the mini-slot. ### Claim 28 (depends on 17) The method of claim 17, further comprising: refraining from decoding the sidelink data from the second UE in response to the AGC signal being received in a different RB than the RB associated with the first UE. ### Claim 29 An apparatus for wireless communication, comprising: a processor; memory coupled with the processor; and instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to: receive an automatic gain control (AGC) signal in an AGC symbol from a user equipment (UE), the AGC symbol indicating that the apparatus is a target of a sidelink communication based on a correspondence of the apparatus with a frequency domain location of a resource block (RB) including the AGC signal; and decode sidelink data in the sidelink communication from the UE in response to the AGC signal. ### Claim 30 (depends on 29) The apparatus of claim 29, wherein the instructions, when executed by the processor, further cause the apparatus to: refrain from decoding the sidelink data from the UE in response to the AGC signal being received in a different RB than the RB associated with the apparatus.