Patent ID: 11963252
Assignee: LG ELECTRONICS INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method performed by a distributed unit (DU) of a network node adapted to operate in a wireless communication system, the method comprising:
receiving a UE context release command message from of a central unit (CU)-control plane (CP) of the network node,
wherein the UE context release command message includes a radio resource control (RRC) release message,
wherein the UE context release command message includes a user plane (UP) identifier (ID) for UL data fast transmission (UDFT), and
wherein the UP ID for UDFT is mapped to a F1 uplink (UL) user plane (UP) transport port network (TNL) information for UDFT based on a mapping table in a pre-configuration;
transmitting the RRC release message and the UP ID for UDFT to a wireless device;
receiving an RRC resume request message and the UP ID for UDFT from the wireless device,
wherein user data for UDFT are multiplexed with the RRC resume request message;
identifying TNL address information for a CU-user plane (UP) of a network based on the UP ID for UDFT and the mapping table; and
transmitting the user data to the CU-UP,
wherein the DU is a logical node hosting radio link control (RLC), media access control (MAC) and physical layers of the network node,
wherein the CU-CP is a logical node hosting radio resource control (RRC) and a control plane part of a packet data convergence protocol (PDCP) of the network node, and
wherein the CU-UP is a logical node hosting a user plane part of the PDCP of the network node.