US Patent No. 10,973,063

DATA FORWARDING METHOD AND DEVICE, NETWORK FUNCTION ENTITY, AND SESSION MANAGEMENT FUNCTION ENTITY


Patent No. 10,973,063
Issue Date April 06, 2021
Title Data Forwarding Method And Device, Network Function Entity, And Session Management Function Entity
Inventorship Hucheng Wang, Beijing (CN)
Assignee CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY, Beijing (CN)

Claim of US Patent No. 10,973,063

1. A data forwarding method for an SMF entity, comprising:receiving a mapping between EPS bearer information and PDU session information from a PGW-C+SMF entity; and
configuring a data forwarding tunnel in accordance with the mapping between the EPS bearer information and the PDU session information,
wherein when data is forwarded from a 5G system to an LTE system, the mapping between the EPS bearer information and the PDU session information is a mapping between IDs of EPS bearers that need to receive the forwarded data and IDs of QoS flows for PDU sessions, wherein the configuring the data forwarding tunnel in accordance with the mapping between the EPS bearer information and the PDU session information comprises:
selecting an UPF entity;
allocating a core network tunnel ID for forwarding the data to a PDU session, and configuring a forwarding tunnel between the UPF entity and a Serving Gateway (SGW) for forwarding the data and a PDU session tunnel between the UPF entity and an NG RAN of the 5G system; and
binding a QoS flow for the PDU session to the forwarding tunnel corresponding to the EPS bearer that needs to receive the forwarded data, so that the UPF entity is capable of forwarding a data packet to a correct EPS bearer forwarding tunnel in accordance with an ID of a QoS flow for the data packet.