Title:
METHOD AND DEVICE FOR UPLINK SYNCHRONIZATION OF TERMINAL IN INACTIVE STATE IN WIRELESS COMMUNICATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/182812
Kind Code:
A1
Abstract:
The present disclosure relates to a method and a device for uplink synchronization of a terminal in an inactive state in a wireless communication system. A method for uplink synchronization of a terminal in an inactive state in a wireless communication system according to an embodiment of the present disclosure may comprise the steps of: receiving periodic uplink transmission resource configuration information from a base station; receiving a timing advance command (TAC) from the base station and starting a timing alignment timer (TAT); receiving a radio resource control (RRC) release message including a suspend configuration from the base station and transitioning to an inactive state; if a predetermined trigger condition is satisfied in the inactive state, performing uplink transmission to the base station on the basis of the periodic uplink transmission resource configuration information, wherein the predetermined trigger condition includes at least one of a condition related to a time elapsed after the TAT starts, a condition related to a time remaining until the TAT expires, a condition related to the expiry of a periodic notification area update timer, and a condition related to reception of a timer advance (TA) update command from the base station, and the uplink transmission includes at least one of small data and dummy data; and receiving an additional TAC from the base station to restart the TAT.
Inventors:
LEE WON SEOK (KR)
KWON KI BUM (KR)
KWON KI BUM (KR)
Application Number:
PCT/KR2021/002797
Publication Date:
September 16, 2021
Filing Date:
March 08, 2021
Export Citation:
Assignee:
INNOVATIVE TECH LAB CO LTD (KR)
International Classes:
H04W56/00; H04W72/04; H04W72/12; H04W76/27
Domestic Patent References:
| WO2018084565A1 | 2018-05-11 |
Foreign References:
| KR20190129340A | 2019-11-20 |
Other References:
ERICSSON, NOKIA, NOKIA SHANGHAI BELL: "Power and signalling savings at TAT expiry and reaching sr-TransMax", 3GPP DRAFT; R2-1916252, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), vol. RAN WG2, no. Reno, U.S.; 20191118 - 20191122, 8 November 2019 (2019-11-08), XP051817791
SAMSUNG: "TA handling in 2-step RACH", 3GPP DRAFT; R2-1915225, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), vol. RAN WG2, no. Reno, NV, USA; 20191118 - 20191122, 8 November 2019 (2019-11-08), XP051817108
LENOVO, MOTOROLA MOBILITY: "Maintenance of Timing Advance at TA timer expiry", 3GPP DRAFT; R2-1800678, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), vol. RAN WG2, no. Vancouver, Canada; 20180122 - 20180126, 11 January 2018 (2018-01-11), XP051385801
SAMSUNG: "TA handling in 2-step RACH", 3GPP DRAFT; R2-1915225, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), vol. RAN WG2, no. Reno, NV, USA; 20191118 - 20191122, 8 November 2019 (2019-11-08), XP051817108
LENOVO, MOTOROLA MOBILITY: "Maintenance of Timing Advance at TA timer expiry", 3GPP DRAFT; R2-1800678, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), vol. RAN WG2, no. Vancouver, Canada; 20180122 - 20180126, 11 January 2018 (2018-01-11), XP051385801
Attorney, Agent or Firm:
CHOE, Yun Seo et al. (KR)
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