Early data transmission in CU-DU split
AssigneeLG Electronics Inc.
InventorsSeokjung Kim, Jian Xu, Daewook Byun
Life of this patent
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Abstract
Provided are a method for early data transmission. According to an embodiment of the present disclosure, the method includes transmitting a radio resource control (RRC) connection resume request message to a control plane (CP) of central unit (CU) of the network node, receiving information informing that downlink (DL) data exists from the CP, receiving DL data from a user plane (UP) of the CU, transmitting the DL data to a wireless device in response to the information, upon receiving the DL data, and releasing transmission resources after transmitting the DL data.
Claims13
A method performed by a distributed unit (DU) of a network node adapted to operate in a wireless communication system, the method comprising:
- transmitting a radio resource control (RRC) resume request message to a central unit (CU) control plane (CP) of the network node;
- upon a determination by the CU-CP to perform early data transmission (EDT) based on the RRC resume request message, transmitting uplink (UL) data to a CU-user plane (UP) of the network node;
- receiving information informing that downlink (DL) data exists from the CU-CP;
- receiving the DL data from the CU-UP;
- transmitting the DL data to a wireless device in response to the information, upon receiving the DL data;
- and
- releasing transmission resources after transmitting the DL data,
- 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 transmit a radio resource control (RRC) resume request message to a CU) control plane (CP) of the network node;
- upon a determination by the CU-CP to perform early data transmission (EDT) based on the RRC resume request message, control the transceiver to transmit uplink (UL) data to a CU-user plane (UP) of the network node;
- control the transceiver to receive information informing that downlink (DL) data exists from the CU-CP;
- control the transceiver to receive the DL data from the CU-UP;
- control the transceiver to transmit the DL data to a wireless device in response to the information, upon receiving the DL data;
- and
- release transmission resources after transmitting the DL data,
- 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.