Patent ID: 11902461
Assignee: T-MOBILE USA, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 10:
11. A system for improving cellular network outage detection, the system comprising:
a packet data network gateway (PGW) connected to a cellular network, the PGW configured to receive and respond to cellular network connection requests from a plurality of mobile devices;
a policy and charging rules function (PCRF) connected to the cellular network, the PCRF configured to receive and respond to authorization requests from the PGW for a first time period; and
an outage detection system connected to the PGW, the outage detection system configured to:
monitor error rates for the authorization requests for the first time period, the error rates including messages from the PCRF;
determine a threshold error rate for the PCRF based on the error rates monitored during the first time period,
detect an excessive error rate for 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, execute an override rule that includes stopping authorization requests between the PGW and the PCRF.