US 12,127,066 B2
Service continuity for PDU session anchor relocation
Tingfang Tang, Beijing (CN); and Genadi Velev, Darmstadt (DE)
Assigned to Lenovo (Beijing) Limited, Beijing (CN)
Appl. No. 17/765,380
Filed by LENOVO (BEIJING) LIMITED, Beijing (CN)
PCT Filed Sep. 30, 2019, PCT No. PCT/CN2019/109431
§ 371(c)(1), (2) Date Mar. 30, 2022,
PCT Pub. No. WO2021/062622, PCT Pub. Date Apr. 8, 2021.
Prior Publication US 2022/0377637 A1, Nov. 24, 2022
Int. Cl. H04W 36/22 (2009.01); H04W 28/08 (2023.01); H04W 36/00 (2009.01)
CPC H04W 36/22 (2013.01) [H04W 28/08 (2013.01); H04W 36/0011 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method performed by a network function, the method comprising:
receiving a charging and policy control (PCC) rule containing a traffic steering control information per application function (AF) request which includes an indication on whether service continuity for offload traffic is supported or not; and
performing a protocol data unit (PDU) session anchor (PSA) relocation based on the information, wherein, if the indication indicates that the service continuity for offload traffic is supported and a source PSA is relocated to a target PSA,
if the source PSA is connected to a source uplink (UL) classifier (ULCL) or branching point (BP) and the target PSA is connected to a target ULCL or BP,
a forwarding tunnel is established between the source ULCL or BP and the target ULCL or BP,
wherein the indication is included in an AF request received from an AF as an independent parameter.