Patent ID: 7831715
Filing Date: 2010-11-09
Classification: H04L

Abstract:
1. A communication system comprising: a first terminal connected to a second terminal over a network; a relay server connected to the first terminal and the second terminal over the network that establishes a first session with the first terminal and a second session with the second terminal; and a session management server connected to the first terminal, the second terminal, and the relay server over the network, the session management server including a session management table that stores, for each of a plurality of relay servers including the relay server, a number of sessions between each of the plurality of relay servers and terminals connected to the plurality of relay servers; wherein the first terminal comprises: wherein the second terminal comprises: wherein the session management server determines that the relay server is a relay server among the plurality of relay servers having a fewest number of sessions in response to the request from the first terminal based on the session management table, designates the relay server as the assigned relay server, and transmits the response including at least one of an IP address and a port number of the relay server as the at least one of the IP address and the port number of the assigned relay server to the first terminal, and wherein said relay server transfers said connection-completed message to said first terminal, and relays communication between said first terminal and said second terminal.