US Patent No. 9,288,724

MOBILE DEVICE HANDOFF OPTIMIZATION


Patent No. 9,288,724
Issue Date March 15, 2016
Title Mobile Device Handoff Optimization
Inventorship Pawankumar C. Narang, Herndon, VA (US)
James J. Bae, Chantilly, VA (US)
Assignee Sprint Communications Company L.P., Overland Park, KS (US)

Claim of US Patent No. 9,288,724

1. A method for optimizing a seamless transition of a mobile device from a 3G network to a 4G network in a failure scenario,
the method comprising:
authenticating the mobile device to the 3G network;
at a network component, determining that the mobile device is initiating a first handoff attempt to access the 4G network;
accessing a subscriber profile database to determine whether a packet gateway identifier associated with the mobile device
is stored on the subscriber profile database;

upon determining that the packet gateway identifier associated with the mobile device is not stored on the subscriber profile
database, denying the first handoff attempt by the mobile device to access the 4G network;

based on the first handoff attempt by the mobile device to access the 4G network being denied, triggering an authorization
request that comprises the packet gateway identifier associated with the mobile device, the packet gateway identifier being
forwarded to the subscriber profile database;

storing the packet gateway identifier on the subscriber profile database;
determining that the mobile device is initiating a second handoff attempt to access the 4G network; and
authorizing the second handoff attempt of the mobile device to access the 4G network based on the packet gateway identifier
associated with the mobile device being stored on the subscriber profile database.