Uplink data fast transmission in CU-DU split
AssigneeLG Electronics Inc.
InventorsSeokjung Kim, Jian Xu, Daewook Byun
Life of this patent
Estimating the term…
Abstract
A method for performing uplink data fast transmission. The method includes receiving a UE context release message including a user plane ID (UPID) from control plane (CP) of a central unit (CU) of the network node, forwarding the UPID via a radio resource control (RRC) connection release message to a wireless device, receiving a RRC resume request message including user data with the UPID from the wireless device, transmitting the user data to CU based on the UPID.
Claims13
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.
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.
Dependencies are inferred from the claim text.