US 11,778,475 B2
Supporting interworking and/or mobility between different wireless communication systems
Noamen Ben Henda, Vällingby (SE); and Monica Wifvesson, Lund (SE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Filed on Aug. 16, 2022, as Appl. No. 17/889,172.
Application 17/889,172 is a continuation of application No. 16/332,973, granted, now 11,418,961, previously published as PCT/EP2019/052618, filed on Feb. 4, 2019.
Claims priority of provisional application 62/632,072, filed on Feb. 19, 2018.
Prior Publication US 2022/0394485 A1, Dec. 8, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04M 1/66 (2006.01); H04W 12/60 (2021.01); H04W 12/106 (2021.01); H04W 8/02 (2009.01); H04W 36/00 (2009.01); H04W 60/04 (2009.01)
CPC H04W 12/60 (2021.01) [H04W 8/02 (2013.01); H04W 12/106 (2021.01); H04W 36/0038 (2013.01); H04W 60/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, performed by a network unit, for supporting interworking between different wireless communication systems, including a higher generation wireless system and a lower generation wireless system, to enable secure communication with a wireless communication device, wherein the method comprises:
selecting, in connection with a registration procedure and/or a security context activation procedure of the wireless communication device with the higher generation wireless system, at least one security algorithm of the lower generation wireless system, also referred to as lower generation security algorithm(s);
sending a control message including information on the selected lower generation security algorithm(s) to the wireless communication device; and
storing information on the selected lower generation security algorithm(s) in the network unit.