# US 10,484,901 B2 · Method and apparatus for receiving a timing advance command in a wireless communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,484,901 B2 - Document ID: US10484901B2 - Status: Granted - Kind: B2 - Application number: 15/841,596 - Filed: 2017-12-14 - Published: 2018-05-03 - Granted: 2019-11-19 - Earliest claimed: 2010-01-07 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Sung Jun Park; Sung Duck Chun; Sung Hoon Jung; Seung June Yi; Young Dae Lee - Web page: https://patentgrep.com/patent/US10484901B2 ## CPC - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04J 11/003: {at the transmitter (transmission to multiple receive units in multiple input multiple output [MIMO] H04B7/0452; transmit antenna weighting H04B7/0615)} - H04J 11/0079: {Acquisition of downlink reference signals, e.g. detection of cell-ID} - H04W 56/00: Synchronisation arrangements - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S) ## Abstract The present invention provides a method of receiving a timing advance command by a user equipment in a wireless communication system. A terminal receives information on a time advance group from a base station, and also receives the tuning advance command corresponding to the time advance group from the base station. ## Claims ### Claim 1 A method of receiving a timing advance command by a user equipment in a wireless communication system, the method comprising: receiving, from a base station, the timing advance command corresponding to a time alignment group; and applying the received timing advance command to at least one serving cell belonging to the time alignment group, wherein the timing advance command is received together with a time alignment group identifier, wherein the time alignment group identifier identifies the time alignment group to which the timing advance command is applied, wherein the time alignment group identifier is included in a medium access control (MAC) control element (CE), and wherein the MAC CE includes both the time alignment group identifier and the timing advance command. ### Claim 2 (depends on 1) The method of claim 1, wherein the time alignment group identifier is a time advance group identifier or a logical channel identifier. ### Claim 3 (depends on 1) The method of claim 1, wherein the applying of the received timing advance command to the at least one serving cell belonging to the time alignment group comprises restarting an uplink alignment timer for the time alignment group. ### Claim 4 (depends on 1) The method of claim 1, wherein the timing advance command is used for an uplink time alignment. ### Claim 5 A method of transmitting a timing advance command by a base station in a wireless communication system, the method comprising: transmitting, to a user equipment, the timing advance command corresponding to a time alignment group, wherein the timing advance command is transmitted together with a time alignment group identifier, wherein the time alignment group identifier identifies the time alignment group to which the timing advance command is applied, wherein the time alignment group identifier is included in a medium access control (MAC) control element (CE), and wherein the MAC CE includes both the time alignment group identifier and the timing advance command. ### Claim 6 (depends on 5) The method of claim 5, wherein the time alignment group identifier is a time advance group identifier or a logical channel identifier. ### Claim 7 (depends on 5) The method of claim 5, wherein the time alignment group is determined based on a serving cell in which the timing advance command is transmitted. ### Claim 8 (depends on 5) The method of claim 5, wherein the timing advance command is for uplink time alignment. ### Claim 9 A User Equipment (UE) for receiving a timing advance command in a wireless communication system, the UE comprising: a transceiver configured to transmit or receive a data; a memory configured to store the data; and a processor configured to cooperate with the transceiver and the memory to: receive the timing advance command corresponding to the time alignment group from a base station; and apply the received timing advance command to at least one serving cell belonging to the time alignment group, wherein the timing advance command is received together with a time alignment group identifier, wherein the time alignment group identifier identifies the time alignment group to which the timing advance command is applied, wherein the time alignment group identifier is included in a medium access control (MAC) control element (CE), and wherein the MAC CE includes both the time alignment group identifier and the timing advance command. ### Claim 10 (depends on 9) The UE of claim 9, wherein the time alignment group identifier is a time advance group identifier or a logical channel identifier. ### Claim 11 (depends on 9) The UE of claim 9, wherein the applying of the received timing advance command to the at least one serving cell belonging to the time alignment group comprises restarting an uplink alignment timer for the time alignment group. ### Claim 12 (depends on 9) The UE of claim 9, wherein the timing advance command is used for an uplink time alignment. ### Claim 13 A base station (BS) for transmitting a timing advance command in a wireless communication system, the BS comprising: a transceiver configured to transmit or receive a data; a memory configured to store the data; and a processor configured to cooperate with the transceiver and the memory to: transmit the timing advance command corresponding to a time alignment group to a user equipment, wherein the timing advance command is transmitted together with a time alignment group identifier, wherein the time alignment group identifier identifies the time alignment group to which the timing advance command is applied, wherein the time alignment group identifier is included in a medium access control (MAC) control element (CE), and wherein the MAC CE includes both the time alignment group identifier and the timing advance command. ### Claim 14 (depends on 13) The BS of claim 13, wherein the time alignment group identifier is a time advance group identifier or a logical channel identifier. ### Claim 15 (depends on 13) The BS of claim 13, wherein the time alignment group is determined based on a serving cell in which the timing advance command is transmitted. ### Claim 16 (depends on 13) The BS of claim 13, wherein the timing advance command is for uplink time alignment.