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.