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

Claim 7:
8. A distributed unit (DU) of a network node adapted to operate in a wireless communication system, the DU comprising:
a memory;
a transceiver; and
a processor, operably coupled to the memory and the transceiver, and configured to:
control the transceiver to receiving a UE context release command message from 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;
control the transceiver to transmitting the RRC release message and the UP ID for UDFT to a wireless device;
control the transceiver to receive 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;
identify TNL address information for a CU-user plane (UP) of a network based on the UP ID for UDFT and the mapping table; and
control the transceiver to transmit 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.