Patent ID: 8159989

Claim:
A relay network system comprising: a terminal adaptor apparatus that has a management table where a transmission-source address of a packet, destination information indicating a destination address or a destination domain name of the packet, and relay path information indicating either through a fixed network or through a mobile network are stored in advance in association with each other, and that relays packets sent from a fixed terminal and a mobile terminal to the fixed network and the mobile network; and a termination network apparatus that accommodates a server for providing services for the fixed terminal and the mobile terminal, and that terminates a session through the fixed network and a session through the mobile network with the terminal adaptor apparatus; wherein the terminal adaptor apparatus receives session establishment request which includes a transmission source address and destination information indicating the server, from either the fixed terminal or the mobile terminal; refers to the management table according to the transmission source address and the destination information to acquire corresponding relay path information; establishes session with the termination network apparatus through the fixed network or the mobile network according to the acquired relay path information; stores session identifier for identifying the session in the management table in association with the transmission source address and the destination information of the session establishment request; when receiving packet that includes transmission source address and destination information, from the fixed terminal or the mobile terminal, refers to the management table to acquire the session identifier corresponding to the transmission source address and the destination information; and relays the packet to the termination network apparatus by using the session through either the fixed network or the mobile network according to the acquired session identifier.