Patent ID: 11968558
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A data transmission method, comprising:
receiving, by a central unit-user plane (CU-UP) of a radio access network (RAN), data of a quality of service (QoS) flow through a default data radio bearer (DRB); and
sending, by the CU-UP to a central unit-control plane (CU-CP) of the RAN, a data notification message notifying the CU-CP that a data packet of the QoS flow is received for a first time through the default DRB, wherein the data notification message comprises a QoS flow identity (ID) of the QoS flow and a protocol data unit (PDU) session ID identifying a PDU session, wherein the PDU session comprises the data of the QoS flow.