Patent ID: 7433344
Filing Date: 2008-10-07
Classification: H04L,H04M,H04W

Abstract:
1. A mobile communication system supporting a messenger service among a plurality of mobile communication terminals, the mobile communication system comprising: a packet data serving node for assigning an Internet Protocol (IP) address to each of the mobile communication terminals, and providing a message exchange service among the mobile communication terminals through a point-to-point protocol connection with the mobile communication terminals; a short message server for providing a short message transmission service among the mobile communication terminals; a host mobile communication terminal from among the mobile communication terminals for receiving the IP address through the point-to-point protocol connection with the packet data serving node, transmitting an invite message, which includes the IP address, in a short message format to the short message server, updating a buddy list using a register message received through the packet data serving node, and transmitting the updated buddy list to the packet data serving node; and at least one client mobile communication terminal from among the mobile communication terminals for receiving the IP address through the point-to-point protocol connection with the packet data serving node when the invite message is received from the short message server, transmitting the register message, including the IP address, to the host mobile communication terminal through the packet data serving node, and receiving the updated buddy list transmitted from the host mobile communication terminal, wherein the host mobile communication terminal and the client mobile communication terminal perform a mutual messenger service through the packet data serving node.