US 12,225,617 B2
Method and apparatus for resume procedure for data transfer in RRC_INACTIVE state in mobile wireless communication system
Soenghun Kim, Gyeonggi-do (KR)
Assigned to BLACKPIN INC., Seoul (KR); and Soenghun Kim, Gyeonggi-do (KR)
Filed by BLACKPIN INC., Seoul (KR)
Filed on Oct. 19, 2023, as Appl. No. 18/381,642.
Application 18/381,642 is a continuation of application No. 18/122,138, filed on Mar. 16, 2023, granted, now 11,832,333.
Application 18/122,138 is a continuation of application No. PCT/KR2022/011385, filed on Aug. 2, 2022.
Claims priority of application No. 10-2021-0108996 (KR), filed on Aug. 18, 2021.
Prior Publication US 2024/0049338 A1, Feb. 8, 2024
Int. Cl. H04W 76/27 (2018.01); H04W 12/03 (2021.01); H04W 12/041 (2021.01); H04W 76/19 (2018.01); H04W 76/30 (2018.01); H04W 72/231 (2023.01); H04W 74/0833 (2024.01)
CPC H04W 76/27 (2018.02) [H04W 12/03 (2021.01); H04W 12/041 (2021.01); H04W 76/19 (2018.02); H04W 76/30 (2018.02); H04W 72/231 (2023.01); H04W 74/0833 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method performed by a terminal, the method comprising:
receiving from a base station a first Radio Resource Control (RRC) message, wherein the first RRC message comprises a set of parameters for RRC_INACTIVE state;
storing RRC configuration in User Equipment (UE) context, wherein the RRC configuration comprises a first security key and a second security key;
transitioning to the RRC_INACTIVE state;
receiving from the base station a system information;
determining to initiate a second resume procedure based on the set of parameters for the RRC_INACTIVE state and the system information;
restoring a first configuration from the UE context, wherein the first configuration comprises a Packet Data Convergence Protocol (PDCP) configuration and a bearer configuration;
reestablishing PDCP entity:
transmitting to the base station a second RRC message, wherein the second RRC message comprises a specific part of a Message Authentication Code, wherein the Message Authentication Code is calculated based on:
the second security key;
a cell identifier; and
a terminal identifier;
performing with the base station data transfer in the RRC_INACTIVE state based on:
a third security key;
a fourth security key; and
the first configuration;
receiving from the base station a third RRC message; and
terminating the second resume procedure.