US 12,114,392 B2
Methods, wireless device, network node and core node for managing reachability of the wireless device
Oscar Zee, Stockholm (SE); Alexander Vesely, Feldbach (AT); Angelo Centonza, Stockholm (SE); and Paul Schliwa-Bertling, Ljungsbro (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Filed by TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Filed on Jul. 14, 2021, as Appl. No. 17/375,422.
Application 17/375,422 is a continuation of application No. 15/749,837, granted, now 11,102,842, previously published as PCT/SE2017/051262, filed on Dec. 13, 2017.
Claims priority of provisional application 62/436,482, filed on Dec. 20, 2016.
Prior Publication US 2022/0007459 A1, Jan. 6, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 76/28 (2018.01); H04W 76/27 (2018.01); H04W 76/38 (2018.01)
CPC H04W 76/38 (2018.02) [H04W 76/27 (2018.02); H04W 76/28 (2018.02)] 16 Claims
OG exemplary drawing
 
1. A method performed by a user equipment, UE, for managing reachability of the UE, the method comprising:
having an RRC connection to a radio base station in a Radio Access Network, RAN, wherein the UE is in a first connected state, wherein in the first connected state there is a first connection between the radio base station and a core node associated with the RAN;
suspending the RRC connection and entering an RRC inactive state during the first connected state;
starting a an Access Stratum, AS, timer when entering the RRC inactive state; and
sending, to the RAN, upon expiry of the AS timer, a first message indicating that the UE is reachable, wherein the first message indicates that the UE is reachable despite there being no established radio connection between the UE and the network, wherein said sending of the first message is initiated when the UE is in the RRC inactive state and when the UE is in the first connected state.