US 12,284,712 B2
Methods for enhancing service continuity between a wireless device and a second network, related core network nodes, and related wireless devices
Lars Nord, Lund (SE)
Assigned to Sony Group Corporation, Tokyo (JP)
Appl. No. 17/788,166
Filed by Sony Group Corporation, Tokyo (JP)
PCT Filed Dec. 17, 2020, PCT No. PCT/EP2020/086884
§ 371(c)(1), (2) Date Jun. 22, 2022,
PCT Pub. No. WO2021/140004, PCT Pub. Date Jul. 15, 2021.
Claims priority of application No. 2050005-4 (SE), filed on Jan. 7, 2020.
Prior Publication US 2023/0028197 A1, Jan. 26, 2023
Int. Cl. H04W 4/00 (2018.01); H04W 76/12 (2018.01); H04W 76/22 (2018.01); H04W 76/25 (2018.01)
CPC H04W 76/25 (2018.02) [H04W 76/12 (2018.02); H04W 76/22 (2018.02)] 20 Claims
OG exemplary drawing
 
1. A method, performed by a first core network node, for enhancing service continuity between a wireless device and a second network via a first network, wherein the first core network node is part of the first network, the method comprising:
receiving, from the wireless device and/or from a second core network node of the first network, control signaling indicating that the wireless device requires that a tunnel, between the wireless device and the second network via a gateway of the first network, is maintained, and
controlling a radio access network node and/or the gateway, based on the control signaling and a capability of the first core network node, to maintain the tunnel, wherein the controlling comprises transmitting, to the radio access network (RAN), control signaling indicating that the wireless device is to use one or more specific power saving modes, and
wherein the wireless device is transitioned to the one or more specific power saving modes and the tunnel is maintained while the wireless device is in the one or more specific power saving modes.