US 11,751,269 B2
Methods providing UE state indication upon delivery failure and related networks and network nodes
Angelo Centonza, Stockholm (SE); Paul Schliwa-Bertling, Ljungsbro (SE); and Qian Chen, Mölndal (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Appl. No. 16/631,918
Filed by TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
PCT Filed Aug. 22, 2018, PCT No. PCT/IB2018/056374
§ 371(c)(1), (2) Date Jan. 17, 2020,
PCT Pub. No. WO2019/038702, PCT Pub. Date Feb. 28, 2019.
Claims priority of provisional application 62/549,188, filed on Aug. 23, 2017.
Prior Publication US 2020/0163146 A1, May 21, 2020
Int. Cl. H04W 76/18 (2018.01); H04W 76/25 (2018.01); H04W 76/27 (2018.01); H04W 8/08 (2009.01); H04W 48/16 (2009.01); H04W 68/00 (2009.01); H04W 92/10 (2009.01)
CPC H04W 76/18 (2018.02) [H04W 8/08 (2013.01); H04W 48/16 (2013.01); H04W 68/005 (2013.01); H04W 76/25 (2018.02); H04W 76/27 (2018.02); H04W 92/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of operating a radio access network (“RAN”) node, the method comprising:
receiving a non-access stratum (“NAS”) packet data unit (“PDU”) for a wireless device from a core network (“CN”) node, the wireless device being in an inactive state in which the wireless device is in a low power mode with discontinuous reception (“DRX”);
paging the wireless device in response to receiving the PDU; and
sending a NAS non-delivery message to the CN node in response to failure of the paging for the wireless device, the NAS non-delivery message including an indication that the wireless device is in the inactive state.