US 12,245,310 B2
Method and apparatus for fast small data transmission in a wireless communication system
Seokjung Kim, Seoul (KR); Jian Xu, Seoul (KR); and Daewook Byun, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/759,186
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Jan. 20, 2021, PCT No. PCT/KR2021/000792
§ 371(c)(1), (2) Date Jul. 20, 2022,
PCT Pub. No. WO2021/150015, PCT Pub. Date Jul. 29, 2021.
Claims priority of application No. 10-2020-0008844 (KR), filed on Jan. 22, 2020; and application No. 10-2020-0128178 (KR), filed on Oct. 5, 2020.
Prior Publication US 2023/0083985 A1, Mar. 16, 2023
Int. Cl. H04W 36/28 (2009.01); H04W 76/12 (2018.01); H04W 76/15 (2018.01); H04W 76/19 (2018.01); H04W 76/20 (2018.01); H04W 76/30 (2018.01)
CPC H04W 76/20 (2018.02) [H04W 76/12 (2018.02); H04W 76/19 (2018.02); H04W 76/30 (2018.02)] 20 Claims
OG exemplary drawing
 
1. A method performed by a last serving Radio Access Network (RAN) node in a wireless communication system, the method comprising,
suspending a Radio Resource Control (RRC) connection with a wireless device;
receiving, from the wireless device and via a new RAN node, an Access Stratum (AS)-Release Assistance Information (RAI) related to early data transmission, wherein the AS-RAI informs whether there is Uplink (UL) data transmission and/or Downlink (DL) data transmission for the wireless device subsequent to the early data transmission, or not;
deciding whether a UE context relocation to the new RAN node for the wireless device is required or not based on the received AS-RAI; and
transmitting, to the new RAN node, an RRC message based on the decision.