Method of enabling a private IP terminal to receive multimedia data

A terminal connected to a router has a private IP address. When this terminal sends a data packet to the service system via the router, the router will change the private IP to a public IP, then tries to send the data packet to the server. The service system knows only the router´s public IP as the destination address. So the response packet is delivered to the router, and the router cannot deliver it to the private network. In the paper, a means of solving this problem is proposed. As this method enhances the service quality, user satisfaction improves.