Patent ID: 8886155
Filing Date: 2014-11-11
Classification: H04W

Abstract:
1. A method performed by a network device, the method comprising: determining that a request received at the network device includes a first indication that an emergency call, initiated by a user device and routed from a source base station in a long term evolution (LTE) network to a public safety access point (PSAP) via a first gateway device serving the source base station, is to be handed off to a target base station associated with a non-LTE network; transmitting, from the network device to a server device and responsive to the first indication, a request for context information associated with the user device, the source base station, and the first gateway device; obtaining, at the network device and from a response to the request for context information, information identifying the first gateway device; transmitting, from the network device to a second gateway device serving the target base station, a bearer request including the information identifying the first gateway device; receiving, at the network device, a second indication that a connection between the first gateway device and the second gateway device has been established for transfer of the emergency call to the PSAP; and transmitting, from the network device and responsive to the second indication, an instruction to the source base station to handoff the emergency call to the target base station.