US 12,250,557 B2
Reregistration during network slice failure
Pieter Nooren, Delft (NL); Wieger IJntema, Rotterdam (NL); Toni Dimitrovski, Boskoop (NL); and Jan Willem Martin Kleinrouweler, Pijnacker (NL)
Assigned to Koninklijke KPN N.V., Rotterdam (NL); and Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek TNO, 's-Gravenhage (NL)
Appl. No. 17/780,748
Filed by Koninklijke KPN N.V., Rotterdam (NL); and Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek TNO, 's-Gravenhage (NL)
PCT Filed Dec. 15, 2020, PCT No. PCT/EP2020/086105
§ 371(c)(1), (2) Date May 27, 2022,
PCT Pub. No. WO2021/122516, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 19216368 (EP), filed on Dec. 16, 2019.
Prior Publication US 2022/0417758 A1, Dec. 29, 2022
Int. Cl. H04W 16/04 (2009.01); H04W 48/18 (2009.01); H04W 60/06 (2009.01)
CPC H04W 16/04 (2013.01) [H04W 48/18 (2013.01); H04W 60/06 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A control system for a visited public land mobile network (VPLM) for wireless communication to roaming user equipment, wherein the VPLM network is configured to enable instantiation of network slices which represent virtual networks;
wherein the control system comprises:
a network interface configured to communicate with the VPLM network; and
a processor system configured to provide:
an access and mobility management function (AMF) for managing the communication to at least one roaming user equipment (UE) via one or more instantiated network slices, and
a slice priority management function (SPM) configured to:
receive data indicative of a change in the VPLM network's ability to maintain the instantiated network slices; and
determine to reduce services via at least one affected network slice in dependence of the received data; and
before said slice reduction, inform the access and mobility management function of said slice reduction;
the access and mobility management function (AMF) configured to:
upon being informed of said slice reduction, send a slice reduction message to the at least one roaming user equipment, the message containing slice reduction information on the cause of said slice reduction to enable the user equipment to establish a connection with an alternate VPLM network before the slice reduction.