Patent ID: 8160081

Claim:
A method for sharing content using a DLNA (Digital Living Network Alliance) network, the method comprising the steps of: creating a DLNA VPN (Virtual Private Network) between an inside-home DLNA network containing a gateway and at least one outside-home DLNA device; and delivering content from an inside-home DLNA device connected to the inside-home DLNA network to an outside-home DLNA device contained in the DLNA VPN in response to a request for content from the outside-home DLNA device; wherein the outside-home DLNA device and the gateway are connected via the DLNA VPN, and the gateway and the inside-home DLNA device are connected via the inside-home DLNA network; and wherein the gateway delivers requests between the inside-home DLNA device and the outside-home DLNA device using a registered IP address of each device; wherein creating a DLNA VPN further comprises the steps of: continuously self-monitoring respective IP addresses by the gateway and at least one outside-home DLNA device registered in the network management server; notifying the network management server of a change in the IP address by a first device; updating the IP address of the first device having an IP address that matches the account information to register a new IP address; delivering the new IP address of the first device to other devices having IP addresses that match the account information; and establishing a new VPN between the first device and other devices by using the changed IP address.