Method of processing anchor user plane function (UPF) for local offloading in 5G cellular network

Patent metadata

Field	Value
Publication number	US-10602415-B2
Application number	US-201816103483-A
Country	US
Kind code	B2
Filing date	Aug 14, 2018
Priority date	Aug 14, 2017
Publication date	Mar 24, 2020
Grant date	Mar 24, 2020

Abstract

Disclosed are a communication scheme and a system thereof for converging an IoT technology and a 5G communication system for supporting a high data transmission rate beyond that of a 4G system. The present disclosure can be applied to intelligent services (for example, services related to a smart home, smart building, smart city, smart car, connected car, health care, digital education, retail business, security, and safety) based on the 5G communication technology and the IoT-related technology. The present disclosure relates to a method of processing an anchor UPF for local offloading when a UE moves in a 5G cellular wireless communication system.

First claim

What is claimed is:

1. A method performed by a session management function (SMF) entity in a wireless communication system, the method comprising:
allocating a first protocol data unit (PDU) session anchor at a procedure for establishing a PDU session on a user equipment (UE); and
allocating a second PDU session anchor for selective traffic routing to a data network, the second PDU session anchor being associated with the PDU session,
wherein the first PDU session anchor is associated with a service and session continuity (SSC) mode of the PDU session, and
wherein the second PDU session anchor is independent of the SSC mode of the PDU session.

2. The method of claim 1 , further comprising maintaining the first PDU session anchor regardless of a mobility of the UE in case that the SSC mode of the PDU session is SCC mode 1.

3. The method of claim 1 , further comprising releasing the second PDU session anchor based on a mobility of the UE.

4. The method of claim 3 , wherein releasing the second PDU session anchor comprises:
identifying whether the UE is located out of a service coverage of the second PDU session anchor; and
releasing the second PDU session anchor regardless of the SSC mode of the PDU session, in case that the UE is located out of the service coverage of the second PDU session anchor.

5. The method of claim 2 , wherein maintaining the first PDU session anchor comprises:
identifying whether the UE is located out of a service coverage of the first PDU session anchor; and
adding an intermediate PDU session anchor for data forwarding between the first PDU session anchor and the UE.

6. A session management function (SMF) entity in a wireless communication system, the SMF entity comprising:
a transceiver; and
a controller coupled with the transceiver and configured to:
allocate a first protocol data unit (PDU) session anchor at a precedure for establishing a PDU session on a user equipment (UE), and
allocate a second PDU session anchor for selective traffic routing to a data network, the second PDU session anchor being associated with the PDU session,

wherein the first PDU session anchor is associated with a service and session continuity (SSC) mode of the PDU session, and
wherein the second PDU session anchor is independent of the SSC mode of the PDU session.

7. The SMF entity of claim 6 , wherein the controller is further configured to:
maintain the first PDU session anchor regardless of a mobility of the UE in case that the SSC mode of the PDU session is SSC mode 1.

8. The SMF entity of claim 6 , wherein the controller is further configured to:
release the second PDU session anchor based on a mobility of the UE.

9. The SMF entity of claim 8 , wherein the controller is further configured to:
identify whether the UE is located out of a service coverage of the second PDU session anchor, and
release the second PDU session anchor regardless of the SSC mode of the PDU session, in case that the UE is located out of the service coverage of the second PDU session anchor.

10. The SMF entity of claim 7 , wherein the controller is further configured to:
identify whether the UE is located out of a service coverage of the first PDU session anchor, and
add an intermediate PDU session anchor for data forwarding between the first PDU session anchor and the UE.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Bae Beomsik
• Lee Jinsung
• Lee Jicheol
• Kweon Kisuk
• Moon Sangjun
• Park Jungshin

Classifications

• H04W8/082

  for traffic bypassing of mobility servers, e.g. location registers, home PLMNs or home agents · CPC title

• H04W36/0027

  for a plurality of data sessions of end-to-end connections, e.g. multi-call or multi-bearer end-to-end data connections · CPC title

• H04W76/32

  Release of transport tunnels · CPC title

• H04W76/30

  Connection release · CPC title

• H04W36/165 Primary

  for reducing network power consumption (H04W36/18 - H04W36/22 take precedence) · CPC title