US 12,010,615 B2
Mobile device context transfer in a 5G system
Alexandre S. Stojanovski, Paris (FR); and Robert Zaus, Munich (DE)
Assigned to Apple Inc., Cupertino, CA (US)
Appl. No. 17/283,337
Filed by Apple Inc., Cupertino, CA (US)
PCT Filed Oct. 8, 2019, PCT No. PCT/US2019/055093
§ 371(c)(1), (2) Date Apr. 7, 2021,
PCT Pub. No. WO2020/076750, PCT Pub. Date Apr. 16, 2020.
Claims priority of provisional application 62/742,762, filed on Oct. 8, 2018.
Prior Publication US 2022/0007280 A1, Jan. 6, 2022
Int. Cl. H04W 48/20 (2009.01); H04W 8/02 (2009.01); H04W 8/20 (2009.01); H04W 48/16 (2009.01); H04W 84/04 (2009.01)
CPC H04W 48/20 (2013.01) [H04W 8/02 (2013.01); H04W 8/20 (2013.01); H04W 48/16 (2013.01); H04W 84/042 (2013.01)] 16 Claims
OG exemplary drawing
 
1. One or more processors of an Access and Mobility Function (AMF) configured to perform operations comprising:
receiving a request from a new AMF for a user equipment (UE) context transfer for a UE registered to the AMF with a first access type, wherein the request includes an indication of a second access type for the UE to register with the new AMF;
determining that an interface cannot be relocated to the new AMF; and
returning to the new AMF a subscription permanent identifier (SUPI) of the UE and an indication that a registration request procedure is validated for integrity protection without including an entire UE context in response to determining that the interface cannot be relocated to the new AMF.