US 12,267,808 B2
Paging and signaling optimisation
Patrick Maguire, Athlone (IE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 17/797,162
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Feb. 7, 2020, PCT No. PCT/EP2020/053217
§ 371(c)(1), (2) Date Aug. 3, 2022,
PCT Pub. No. WO2021/155957, PCT Pub. Date Aug. 12, 2021.
Prior Publication US 2023/0052947 A1, Feb. 16, 2023
Int. Cl. H04W 68/02 (2009.01)
CPC H04W 68/02 (2013.01) 14 Claims
OG exemplary drawing
 
1. A method performed by a first network function, the method comprising:
receiving, from a second network function, a first message indicating that a core network needs to signal with a wireless device in delivering a service to said wireless device, wherein the service is delivered via a network slice;
determining an identifier of the network slice associated with the service;
determining a connection management state (CM-state) of the wireless device; and
sending a second message in response to said first message, wherein said second message is based on said CM-state and said identifier of the network slice associated with the service,
wherein the first network function determines that the CM-state of the wireless device is CONNECTED and the method comprises, in response, determining whether the wireless device is in the coverage area of said network slice associated with the service; and
wherein the first network function determines that the wireless device is in the coverage area of said network slice and, in response, the second message comprises an indication that the first network function is able to successfully send messages towards a radio access network serving the wireless device and the method comprises sending the second message to the second network function, and inhibiting paging towards said radio access network; or
wherein the first network function determines that the wireless device is in an area which is not served by the coverage area of said network slice and, in response, the second message comprises an indication that the first network function is not able to successfully send messages towards a radio access network serving the wireless device and the method comprises sending the second message to the second network function, and inhibiting paging towards said radio access network; or
wherein the first network function determines that the wireless device is in an area which is not served by the coverage area of said network slice and, in response, the second message comprises an indication that the wireless device is in a Non-Allowed Service Area and the method comprises sending the second message to the second network function, and inhibiting paging towards said radio access network.