US 12,114,222 B2
Method and apparatus for switching UPFs
Dinand Roeland, Sollentuna (SE); Göran Eriksson, Norrtälje (SE); and Gunnar Mildh, Sollentuna (SE)
Assigned to Telefonaktiebolaget LM Ericsson (Publ), Stockholm (SE)
Appl. No. 17/437,611
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Mar. 15, 2019, PCT No. PCT/SE2019/050235
§ 371(c)(1), (2) Date Sep. 9, 2021,
PCT Pub. No. WO2020/190180, PCT Pub. Date Sep. 24, 2020.
Prior Publication US 2022/0191763 A1, Jun. 16, 2022
Int. Cl. H04W 36/32 (2009.01); H04W 36/00 (2009.01); H04W 76/15 (2018.01)
CPC H04W 36/32 (2013.01) [H04W 36/00837 (2018.08); H04W 76/15 (2018.02)] 14 Claims
OG exemplary drawing
 
1. A method, performed by a core network node of a wireless communications network, the wireless communications network further comprising a first gNB and a second gNB, a wireless device, WD, is connected to the first gNB, and there is a first Packet Data Unit, PDU, session established between the WD and a Data Network, DN, over a first User Plane Function, UPF, the DN comprising an application server, AS, the method comprising:
obtaining information regarding a predicted positional change of the WD indicating a new future position of the WD;
selecting a second UPF which is more suitable than the first UPF for transmission of data between the application server and the WD for the new future position;
triggering establishment of the second PDU session over the second UPF, the triggering establishment of the second PDU session over the second UPF including triggering establishment of the second PDU session over the second UPF via the second qNB, the triggering establishment of the second PDU session over the second UPF via the second qNB including triggering establishment of the second PDU session over the second UPF via the first gNB;
in response to the establishment of the second PDU session over the second UPF via the first qNB, facilitating a transfer of the second PDU session over the second UPF from the first qNB to the second gNB; and
in response to the triggering establishment of the second PDU session over the second UPF, triggering a first move of packet flows from the first PDU session to the second PDU session.