US 12,231,973 B2
Method and apparatus for performing small data transmission for a terminal in wireless mobile communication system
Soenghun Kim, Gyeonggi-do (KR)
Assigned to Blackpin Inc., Seoul (KR); and Soenghun Kim, Hanam-si (KR)
Filed by BLACKPIN INC., Seoul (KR); and Soenghun Kim, Gyeonggi-do (KR)
Filed on Apr. 21, 2023, as Appl. No. 18/137,439.
Claims priority of application No. 10-2022-0057689 (KR), filed on May 11, 2022.
Prior Publication US 2023/0370914 A1, Nov. 16, 2023
Int. Cl. H04W 72/21 (2023.01); H04W 36/00 (2009.01); H04W 36/30 (2009.01); H04W 72/231 (2023.01); H04W 76/30 (2018.01)
CPC H04W 36/0077 (2013.01) [H04W 36/30 (2013.01); H04W 72/21 (2023.01); H04W 72/231 (2023.01); H04W 76/30 (2018.02)] 4 Claims
OG exemplary drawing
 
1. A method by a terminal in a communication system, the method comprising:
receiving a RRCRelease from a base station, wherein the RRCRelease comprises first information for small data transmission (SDT), the first information comprises a signaling radio bearer2 (SRB2) indicator, a data radio bearer (DRB) list, and a first timer value;
performing cell selection;
receiving a SystemInformationBlock1 in selected cell, wherein the SystemInformationBlock1 comprises second information for SDT, wherein the second information comprises a first threshold value and a second threshold value, wherein the first threshold value is related to a reference signal received power and the second threshold value is related to data volume;
initiating a SDT procedure based on the first information and the second information;
transmitting a Medium Access Control (MAC) Protocol Data Unit (PDU) comprising Common Control Channel (CCCH) Service Data Unit (SDU) for initial Physical Uplink Shared Channel (PUSCH) transmission;
starting a first timer;
monitoring a Physical Downlink Control Channel (PDCCH) for a first identifier based on a first search space or a second search space; and
stopping the first timer in case that a downlink assignment for the first identifier is received via the PDCCH,
wherein state transition to RRC_IDLE state is performed in case that the first timer expires.