US Patent No. 9,414,415

CALL SETUP SYSTEM AND METHOD FOR SETTING UP A WIRELESS MEDIA SESSION EXTENDING FROM A FIRST NETWORK TO A SECOND NETWORK


Patent No. 9,414,415
Issue Date August 09, 2016
Title Call Setup System And Method For Setting Up A Wireless Media Session Extending From A First Network To A Second Network
Inventorship Hal S. Beech, Olathe, KS (US)
Nicolas A. Nehme Antoun, Olathe, KS (US)
Philip Martin Kunkel, Overland Park, KS (US)
Assignee Sprint Communications Company L.P., Overland Park, KS (US)

Claim of US Patent No. 9,414,415

1. A method of operating a data communication system to exchange user data between a first wireless communication device and
a second wireless communication device over a first wireless communication network, an interconnect communication network,
and a second wireless communication network, the method comprising:
a first soft-switch in the first wireless communication network receiving a first message transferred by the first wireless
communication device wherein the first message indicates a first telephone number of the first wireless communication device
and a second telephone number of the second wireless communication device;

the first soft-switch in the first wireless communication network identifying the interconnect communication network based
on the first telephone number and the second telephone number and identifying a first gateway network address for a first
media gateway in the interconnect communication network;

after identifying the first gateway network address, the first soft-switch in the first wireless communication network binding
the first wireless communication device to the first wireless communication network and binding the first wireless communication
network to the first media gateway;

the first soft-switch in the first wireless communication network transferring a second message to a second soft-switch in
the second wireless communication network wherein the second message indicates the first telephone number, the second telephone
number, and the first gateway network address;

the second soft-switch in the second wireless communication network identifying the interconnect communication network based
on the first telephone number and the second telephone number and identifying a second gateway network address for a second
media gateway in the interconnect communication network;

after identifying the second gateway network address, the second soft-switch in the second wireless communication network
binding the second media gateway to the second wireless communication network and binding the second wireless communication
network to the second wireless communication device;

the second soft-switch in the second wireless communication network transferring a third message to the first soft-switch
in the first wireless communication network, wherein the third message indicates the second gateway network address; and

the first soft-switch in the first wireless communication network receiving the third message that indicates the second gateway
network address and in response, transferring a setup completion message to the first wireless communication device, wherein
the user data is exchanged between the first wireless communication device and the second wireless communication device over
the first wireless communication network, the first media gateway, the second media gateway, and the second wireless communication
network.