Patent ID: 8199697

Claim:
A network system for sharing files, comprising: an IP Multimedia Subsystem (IMS) to provide a primary cellular data connection between engaged devices, the engaged devices including at least one device that is engaged in a voice communication with another device that is part of an emergency response service, the voice communication occurring over a cellular voice connection, the IMS to further provide a secondary cellular data connection to share a file between the engaged devices; and a plurality of units capable of acting as a gateway between the devices and an IP network, wherein the plurality of units initiate, maintain, and terminate the cellular data connections while the devices are engaged in voice communication; wherein data connection requests between the engaged devices are initiated using a Session Initiation Protocol (SIP) or Packet Delivery Protocol (PDP); and wherein the PDP connection between the engaged devices uses the primary cellular data connection to send and receive a plurality of file requests and the secondary cellular data connection to send and receive a plurality of files.