Patent ID: 9203809
Filing Date: 2015-12-01
Classification: H04L

Abstract:
1. A method of transmitting media data of a camera to a user terminal in a communication environment in which the camera connected to a first network and the user terminal connected to a third network are connected to a second network, the method comprising: obtaining, by the camera, first address information of the first network of the camera; obtaining, by the camera, second address information of the second network from an address conversion apparatus connected to the camera; obtaining, by the camera, third address information of the second network from an address providing apparatus connected to the second network; transmitting, by the camera, the first through third address information to the user terminal through a session control server connected to the second network in response to a request for session information from the user terminal through the session control server; receiving, by the camera, a camera control signal from the user terminal through the session control server and notifying, by the camera, an event to the user terminal through the session control server; and transmitting, by the camera, the media data to the user terminal based on at least one of the first through third address information, wherein the first address information is a private address of the camera, the second address information is an external address of the address conversion apparatus connected to the camera, and the third address information is an official address of the address conversion apparatus connected to the camera which is obtained from the address providing apparatus connected to the camera, wherein the transmitting the media data comprises transmitting the media data to the user terminal through the session control server if direct transmission of the media data to the user terminal has failed.