US 11,818,797 B2
Method and apparatus for controlling UE context in wireless communication system
Jeongyeob Oak, Suwon-si (KR); and Jisoo Song, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Oct. 18, 2021, as Appl. No. 17/503,548.
Application 17/503,548 is a continuation of application No. 16/791,104, filed on Feb. 14, 2020, granted, now 11,153,749.
Claims priority of application No. 10-2019-0017344 (KR), filed on Feb. 14, 2019; and application No. 10-2019-0018223 (KR), filed on Feb. 15, 2019.
Prior Publication US 2022/0038888 A1, Feb. 3, 2022
Int. Cl. H04W 8/24 (2009.01); H04W 24/02 (2009.01)
CPC H04W 8/24 (2013.01) [H04W 24/02 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method performed by a distributed unit (DU) of a next generation node B (gNB) in a wireless communication system, the method comprising:
transmitting, to a central unit (CU) of the gNB, a user equipment (UE) context modification required message to request a UE context modification;
receiving, from the CU, a UE context modification refuse message indicating that the UE context modification is unsuccessful; and
receiving, from the CU, a UE context modification request message including a complete indicator of a reconfiguration procedure,
wherein the reconfiguration procedure is based on a change of at least one parameter of the DU of the gNB signaled to the gNB-CU,
wherein the reconfiguration procedure is associated with an evolved node B (eNB) and the eNB and the gNB are configured in a dual connectivity,
wherein the UE context modification required message includes a gNB-CU UE identifier (ID) for identifying a UE within the CU and a gNB-DU UE ID for identifying a UE within the DU,
wherein the UE context modification refuse message includes the gNB-CU UE ID, the gNB-DU UE ID, and information on a cause of the unsuccessful UE context modification,
wherein the CU is associated with a radio resource control (RRC) layer and a packet data convergence protocol (PDCP) layer, and
wherein the DU is associated with a radio link control (RLC) layer, a medium access control (MAC) layer, and a physical (PHY) layer.