Patent ID: 11877178
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A system, comprising:
a core network (CN) device; and
a radio access network (RAN) device,
wherein the CN device and the RAN device are separate devices connected through a next generation (NG) interface, and wherein the CN device includes at least one of a mobility management function (AMF), a session management function (SMF), or a user plane network element (UPF),
wherein the CN device comprises at least one first processor and a first non-transitory computer-readable storage medium coupled with the at least one first processor and configured to store a first program including first instructions which, when being executed by the at least one first processor, cause the CN device to:
determine a quality of service (QoS) flow identifier (QFI) length of a QFI from a plurality of QFI lengths, the QFI associated with downlink transmission of a QoS flow when a protocol data unit (PDU) session is established or modified for a terminal device,
send, to a RAN device, a first message, wherein the first message comprises QFI length information of the QFI, wherein the QFI length information indicates at least one of: a length value of the QFI, a value range of the QFI, or a length class of the QFI, and
send a third message to the RAN device, the third message includes a QFI mapping relationship of a plurality of QFIs including the QFI, wherein the QFI mapping relationship includes a correspondence between the QFI and the QFI length used by at least one QoS flow after the PDU session is modified, and wherein the QFI mapping relationship further includes a second correspondence between a second QFI and a second length used by the at least one QoS flow in the PDU session before the PDU session is modified; and

wherein the RAN device comprises at least one second processor and a second non-transitory computer-readable storage medium coupled with the at least one second processor and configured to store a second program including second instructions which, when being executed by the at least one second processor, cause the RAN device to:
receive, from the CN device, the first message;
send a second message to the terminal device, wherein the second message comprises the QFI length information of the QFI indicating the QFI length determined by the CN device,
wherein the QFI length indicated by the QFI length information of the QFI is a PDU session-specific QFI length, and the PDU session-specific QFI length is used for all QoS flows in the PDU session, or
wherein the QFI length indicated by the QFI length information of the QFI is a QoS flow-specific QFI length, and different QoS flows in the PDU session use different QFI lengths; and
receive the third message from the CN device.