US 12,452,817 B2
On inter-system registration failure case in mobile communications
Matti Moisanen, Oulu (FI)
Assigned to MediaTek Singapore Pte. Ltd., Singapore (SG)
Filed by MediaTek Singapore Pte. Ltd., Singapore (SG)
Filed on Nov. 12, 2022, as Appl. No. 17/985,844.
Claims priority of provisional application 63/283,244, filed on Nov. 25, 2021.
Prior Publication US 2023/0180168 A1, Jun. 8, 2023
Int. Cl. H04W 60/00 (2009.01)
CPC H04W 60/00 (2013.01) 10 Claims
OG exemplary drawing
 
1. A method, comprising:
performing, by a processor of a user equipment (UE), a registration procedure with a wireless network after an inter-system change;
detecting, by the processor, a failure of the registration procedure; and
responsive to the detecting, reattempting, by the processor, the registration procedure upon expiry of a first timer used by the UE which has a shorter duration than a second timer used by the UE,
wherein the reattempting of the registration procedure comprises:
setting a shorter duration for a T3511 timer, as the first timer, to be shorter than a duration of a normal T3511 timer, as the second timer; and
transmitting a registration request to the wireless network upon expiry of the T3511 timer with the shorter duration.