# US 2021/0243732 A1 · Timing advance command in downlink control information > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0243732 A1 - Document ID: US20210243732A1 - Status: Published application - Kind: A1 - Application number: 17/137,123 - Filed: 2020-12-29 - Published: 2021-08-05 - Earliest claimed: 2020-01-31 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Qian ZHANG; Yan ZHOU; Tao LUO - Web page: https://patentgrep.com/patent/US20210243732A1 ## CPC - H04W 56/0045: {compensating for timing error by altering transmission time} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - 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, in one or more downlink resources, a timing advance command in downlink control information; and implement the timing advance command after an action time period commencing from receipt of the timing advance command elapses. Numerous other aspects are provided. ## Claims ### Claim 1 A user equipment (UE) for wireless communication, comprising: a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors configured to: receive, in one or more downlink resources, a timing advance command in downlink control information; and implement the timing advance command after an action time period commencing from receipt of the timing advance command elapses. ### Claim 2 (depends on 1) The UE of claim 1, wherein the one or more processors, when receiving the timing advance command in the downlink control information, are configured to: receive the timing advance command in the downlink control information of a physical downlink control channel. ### Claim 3 (depends on 1) The UE of claim 1, wherein the action time period is defined in a specification. ### Claim 4 (depends on 1) The UE of claim 1, wherein the action time period elapses a threshold quantity of time after an end of an uplink resource, wherein the uplink resource overlaps with a last downlink resource, of the one or more downlink resources, in which the timing advance command is received. ### Claim 5 (depends on 1) The UE of claim 1, wherein the one or more processors are further configured to: transmit, in one or more uplink resources, an acknowledgement message as a response to the downlink control information, wherein the action time period elapses a threshold quantity of time after an end of a last uplink resource, of the one or more uplink resources, in which the acknowledgement message is transmitted. ### Claim 6 (depends on 1) The UE of claim 1, wherein the action time period is a threshold quantity of symbols or slots. ### Claim 7 (depends on 1) The UE of claim 1, wherein a subcarrier spacing of the action time period is based at least in part on a minimum subcarrier spacing of a set of configured uplink bandwidth parts of a set of uplink carriers in a timing advance group of the UE. ### Claim 8 (depends on 1) The UE of claim 1, wherein the action time period is based at least in part on at least one of a first component, a second component, and a third component. ### Claim 9 (depends on 8) The UE of claim 8, wherein the first component is a minimum required quantity of symbols from an end of a physical downlink control channel that includes the downlink control information to a start of a physical uplink control channel conveying an acknowledgement message. ### Claim 10 (depends on 8) The UE of claim 8, wherein the second component is a minimum required quantity of symbols from an end of a scheduling downlink control information to a start of a scheduled physical downlink shared channel. ### Claim 11 (depends on 8) The UE of claim 8, wherein a subcarrier spacing of first component and the second component is determined based at least in part on a minimum subcarrier spacing of a set of subcarrier spacings, wherein the set of subcarrier spacings includes one or more subcarrier spacings of a set of configured uplink bandwidth parts of a set of uplink carriers in a timing advance group, and wherein the set of subcarrier spacings includes one or more subcarrier spacings of a set of configured downlink bandwidth parts for a set of downlink carriers corresponding to the set of uplink carriers. ### Claim 12 (depends on 8) The UE of claim 8, wherein the third component is a maximum value of the timing advance command. ### Claim 13 (depends on 8) The UE of claim 8, wherein the third component is determined based at least in part on a minimum subcarrier spacing of a set of subcarrier spacings, wherein the set of subcarrier spacings includes one or more subcarrier spacings of a set of configured uplink bandwidth parts of a set of uplink carriers in a timing advance group, and wherein the set of subcarrier spacings includes one or more subcarrier spacings of a set of configured initial uplink bandwidth parts of an initial uplink bandwidth part configuration message. ### Claim 14 A base station (BS) for wireless communication, comprising: a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors configured to: transmit, in one or more downlink resources and to a user equipment (UE), a timing advance command in downlink control information; and communicate with the UE in accordance with the timing advance command after an action time period elapses. ### Claim 15 (depends on 14) The BS of claim 14, wherein the one or more processors, when transmitting the timing advance command in the downlink control information, are configured to: transmit the timing advance command in the downlink control information of a physical downlink control channel. ### Claim 16 (depends on 14) The BS of claim 14, wherein the action time period is defined in a specification. ### Claim 17 (depends on 14) The BS of claim 14, wherein the action time period elapses a threshold quantity of time after an end of an uplink resource, wherein the uplink resource overlaps with a last downlink resource, of the one or more downlink resources, in which the timing advance command is received. ### Claim 18 (depends on 14) The BS of claim 14, wherein the one or more processors are further configured to: receive, in one or more uplink resources and from the UE, an acknowledgement message as a response to the downlink control information, wherein the action time period elapses a threshold quantity of time after an end of a last uplink resource, of the one or more uplink resources, in which the acknowledgement message is transmitted. ### Claim 19 (depends on 14) The BS of claim 14, wherein the action time period is a threshold quantity of symbols or slots. ### Claim 20 (depends on 14) The BS of claim 14, wherein a subcarrier spacing of the action time period is based at least in part on a minimum subcarrier spacing of a set of configured uplink bandwidth parts of a set of uplink carriers in a timing advance group of the UE. ### Claim 21 (depends on 14) The BS of claim 14, wherein the action time period is based at least in part on at least one of a first component, a second component, and a third component. ### Claim 22 (depends on 21) The BS of claim 21, wherein the first component is a minimum required quantity of symbols from an end of a physical downlink control channel that includes the downlink control information to a start of a physical uplink control channel conveying an acknowledgement message. ### Claim 23 (depends on 21) The BS of claim 21, wherein the second component is a minimum required quantity of symbols from an end of a scheduling downlink control information to a start of a scheduled physical downlink shared channel. ### Claim 24 (depends on 21) The BS of claim 21, wherein a subcarrier spacing of first component and the second component is determined based at least in part on a minimum subcarrier spacing of a set of subcarrier spacings, wherein the set of subcarrier spacings includes one or more subcarrier spacings of a set of configured uplink bandwidth parts of a set of uplink carriers in a timing advance group, and wherein the set of subcarrier spacings includes one or more subcarrier spacings of a set of configured downlink bandwidth parts for a set of downlink carriers corresponding to the set of uplink carriers. ### Claim 25 (depends on 21) The BS of claim 21, wherein the third component is a maximum value of the timing advance command. ### Claim 26 (depends on 21) The BS of claim 21, wherein the third component is determined based at least in part on a minimum subcarrier spacing of a set of subcarrier spacings, wherein the set of subcarrier spacings includes one or more subcarrier spacings of a set of configured uplink bandwidth parts of a set of uplink carriers in a timing advance group, and wherein the set of subcarrier spacings includes one or more subcarrier spacings of a set of configured initial uplink bandwidth parts of an initial uplink bandwidth part configuration message. ### Claim 27 A method of wireless communication performed by a user equipment (UE), comprising: receiving, in one or more downlink resources, a timing advance command in downlink control information; and implementing the timing advance command after an action time period commencing from receipt of the timing advance command elapses. ### Claim 28 (depends on 27) The method of claim 27, wherein receiving the timing advance command in the downlink control information comprises: receiving the timing advance command in the downlink control information of a physical downlink control channel. ### Claim 29 A method of wireless communication performed by a base station (BS), comprising: transmitting, in one or more downlink resources and to a user equipment (UE), a timing advance command in downlink control information; and communicating with the UE in accordance with the timing advance command after an action time period elapses. ### Claim 30 (depends on 29) The method of claim 29, wherein transmitting the timing advance command in the downlink control information comprises: transmitting the timing advance command in the downlink control information of a physical downlink control channel.