US 12,425,950 B2
Robust NAS layer signaling
Prajwol Kumar Nakarmi, Sollentuna (SE); George Foti, Dollard des Ormeaux (CA); and Qian Chen, Mölndal (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Appl. No. 17/792,338
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Jan. 12, 2021, PCT No. PCT/EP2021/050429
§ 371(c)(1), (2) Date Jul. 12, 2022,
PCT Pub. No. WO2021/144238, PCT Pub. Date Jul. 22, 2021.
Claims priority of provisional application 62/960,541, filed on Jan. 13, 2020.
Prior Publication US 2023/0121717 A1, Apr. 20, 2023
Int. Cl. H04W 48/02 (2009.01); H04W 60/04 (2009.01)
CPC H04W 48/02 (2013.01) [H04W 60/04 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method implemented by a user equipment (UE) of sending a non-access stratum (NAS) message to a core network node in a wireless communication network, the method comprising:
determining whether a NAS request message contains a spurious information element, wherein
the NAS request message comprises a first NAS request message with a message container containing a second NAS request message; and
determining whether the NAS request message contains a spurious information element comprises:
determining that the NAS request message does not contain a spurious information element by determining that a type of the second NAS request message matches a type of the first NAS request message, or
determining that the NAS request message contains a spurious information element by determining that the type of the second NAS request message does not match the type of the first NAS request message; and
after determining that the NAS request message does not contain a spurious information element, transmitting the NAS request message; or
after determining that the NAS request message contains a spurious information element, refraining from transmitting the NAS request message.