US 11,943,678 B2
Controlled handover from an incoming access network to a cellular access network of a visited network while in roaming
George Foti, Dollard des Ormeaux (CA); and Ralf Keller, Würselen (DE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 17/280,261
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Sep. 11, 2019, PCT No. PCT/IB2019/057672
§ 371(c)(1), (2) Date Mar. 26, 2021,
PCT Pub. No. WO2020/065432, PCT Pub. Date Apr. 2, 2020.
Claims priority of provisional application 62/754,922, filed on Nov. 2, 2018.
Claims priority of provisional application 62/736,792, filed on Sep. 26, 2018.
Prior Publication US 2022/0053401 A1, Feb. 17, 2022
Int. Cl. H04W 36/32 (2009.01); H04W 8/12 (2009.01); H04W 36/00 (2009.01); H04W 36/14 (2009.01); H04W 84/12 (2009.01)
CPC H04W 36/32 (2013.01) [H04W 8/12 (2013.01); H04W 36/0022 (2013.01); H04W 36/14 (2013.01); H04W 84/12 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A method for handover of a wireless device from an incoming access network to a cellular access network of a visited cellular network while in roaming, the method comprising:
at the wireless device:
sending a message to the visited cellular network, wherein:
the message is related to a handover of the wireless device from the incoming access network to the cellular access network of the visited cellular network; and
the message comprises an incoming access indication, wherein the incoming access indication is an indication of the incoming access network from which the handover of the wireless device is desired; and
at a core network node:
receiving the message;
making a decision as to whether to accept or reject the handover based on the incoming access indication, wherein making the decision as to whether to accept or reject the handover based on the incoming access indication comprises deciding to reject the handover based on the incoming access information;
upon deciding to reject the handover, rejecting the handover using a code that indicates that the handover failed due to a non-allowed incoming access network; and
sending a message to the wireless device that indicates that the handover is rejected, the message comprising the code that indicates that the handover failed due to a non-allowed incoming access network.