US 12,464,334 B2
Device IMEI/IMEISV/TAC screening and steering while roaming in wireless networks
Nandita Sharma, Sammamish, WA (US)
Assigned to T-Mobile USA, Inc., Bellevue, WA (US)
Filed by T-Mobile USA, Inc., Bellevue, WA (US)
Filed on Nov. 1, 2022, as Appl. No. 17/978,402.
Application 17/978,402 is a continuation of application No. 17/157,372, filed on Jan. 25, 2021, granted, now 11,516,648.
Prior Publication US 2023/0052844 A1, Feb. 16, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 48/04 (2009.01); H04W 8/02 (2009.01); H04W 8/06 (2009.01); H04W 8/08 (2009.01); H04W 48/20 (2009.01); H04W 64/00 (2009.01)
CPC H04W 8/08 (2013.01) [H04W 8/06 (2013.01); H04W 48/04 (2013.01); H04W 48/20 (2013.01); H04W 64/00 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A home network mobility management entity (MME) for screening and steering an electronic device to an approved foreign network during roaming, the home network MME comprising a processor and a memory storing instructions for execution by the processor for:
receiving a request from a foreign network base station for the electronic device to attach to the foreign network base station, wherein the request is received prior to the electronic device attaching to the foreign network base station and the request includes a location update that comprises a first address corresponding to the foreign network base station that sent the request and a second address corresponding to the electronic device;
determining an attach status of the electronic device for the foreign network base station based on the request, the attach status indicating that the electronic device is blocked from the foreign network base station; and
in response to the attach status, automatically sending a control signal for the electronic device to block attachment of the electronic device to the foreign network base station.