US Patent No. 9,380,608

ENHANCED EMERGENCY CALL MOBILITY SUPPORT


Patent No. 9,380,608
Issue Date June 28, 2016
Title Enhanced Emergency Call Mobility Support
Inventorship Kevin D. Bowles, Lenexa, KS (US)
Robert H. Burcham, Overland Park, KS (US)
Jason R. Delker, Olathe, KS (US)
Assignee Sprint Communications Company L.P., Overland Park, KS (US)

Claim of US Patent No. 9,380,608

1. A system for connecting a mobile emergency call to a public safety answering point, comprising:
a processor;
a non-transitory memory; and
an application stored in the memory that, when executed by the processor,
receives an emergency call from a mobile station that originated from a roaming communication service provider network, wherein
the mobile station is associated with a non-dialable number allocated by a home communication service provider network, and
wherein the roaming communication service provider network routes the emergency call into the home communication service provider
network based on a routable number to which the emergency call is directed that references a network node in the home communication
service provider network,

in response to receiving the emergency call from the mobile station in the roaming communication service provider network,
associates, by the home communication service provider network, a temporary dialable number to the non-dialable number, and

promotes establishing a communication link between the mobile station in the roaming communication service provider network
and a public safety answering point and providing the temporary dialable number to the public safety answering point, wherein,
when the public safety answering point drops the communication link with the mobile station, the public safety answering point
reconnects to the mobile station by calling the temporary dialable number, and wherein the temporary dialable number routes
into the home communication service provider network to a signaling node and the signaling node and the roaming communication
service provider network work together to connect the public safety answering point to the mobile station.