US 11,902,461 B2
Systems and methods for detecting network outages
Shon Lonkar, Maple Valley, WA (US)
Assigned to T-Mobile USA, Inc., Bellevue, WA (US)
Filed by T-Mobile USA, Inc., Bellevue, WA (US)
Filed on May 20, 2022, as Appl. No. 17/749,350.
Application 17/749,350 is a continuation of application No. 17/009,443, filed on Sep. 1, 2020, granted, now 11,363,148.
Prior Publication US 2022/0279076 A1, Sep. 1, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04M 15/00 (2006.01); H04W 24/00 (2009.01); H04W 72/20 (2023.01)
CPC H04M 15/66 (2013.01) [H04W 24/00 (2013.01); H04W 72/20 (2023.01)] 15 Claims
OG exemplary drawing
 
1. A computer-implemented method for cellular network outage detection, the method comprising:
receiving requests for connection to a cellular network from a plurality of mobile devices over the cellular network;
sending, in response to the cellular network connection requests, authorization requests between a packet data network gateway (PGW) connected to the cellular network and a policy and charging rules function (PCRF) for a first time period;
monitoring error rates for the authorization requests for the first time period, the error rates including messages from the PCRF;
determining a threshold error rate for the PCRF based on the error rates monitored during the first time period;
detecting an excessive error rate for the authorization requests between the PGW and the PCRF during a second time period subsequent the first time period, the excessive error rate being in excess of the threshold error rate; and
in response to detecting the excessive error rate in the second time period, executing an override rule that includes stopping the authorization requests between the PGW and the PCRF.