BIDIRECTIONAL COMMUNICATION SYSTEM AND SERVER APPARATUS USED THEREIN

• US 20130060847A1
• Filed: 05/11/2010
• Published: 03/07/2013
• Est. Priority Date: 05/11/2010
• Status: Active Grant

• Current Assignee: Chepro Corporation
• Original Assignee: Chepro Company Limited
• Inventors: Fukuda, Reiji
• Granted Patent: US 9,838,223 B2
• Time in Patent Office: Days
• US Class Current: 709/203
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
• CPC Class Codes: H04L 2101/30 Types of network names
• CPC Class Codes: H04L 61/2514 between local and global IP addresses
• CPC Class Codes: H04L 61/256 NAT traversal

Abstract

When a client has accessed a server via routers, the server inherits an IP address used during the access and further adds an arbitrary system ID thereto, thereby generating a new connection address. The server then notifies the system ID to the client and further generates a communication process for communicating with the client. The communication between the client and the server from then on is performed, based on the new connection address, by the communication process. Since the connection address, which is generated anew for the communication between the communication process of the server and the client, includes the same IP address as was used during the initial access, the NAT functions of the routers can be used without any problems.

Claims

1. A bidirectional communication system having a structure in which a client can be connected to a server through a router on internet and the server offers a service to meet a demand sent from the client by application software,

wherein the server includes an access accepting portion for accepting access to be given from the client through the router in order to demand a service;

an address generating portion for giving optional identification information to an IP address sent with a conversion from a global address to a local address by the router, thereby generating a new connection address when the access is accepted by the access accepting portion;

an identification information notifying portion for notifying the client of the identification information through the router by using the new connection address generated by the address generating portion; and

a communication process generating portion for generating a communication process for carrying out a communication with the client based on the new connection address generated by the address generating portion, and the client includes a first communication processing portion for giving the access to the access accepting portion of the server; and

a second communication processing portion for using the new connection address generated by giving the IP address the identification information sent from the identification information notifying portion to carry out a communication with the communication process generated by the communication process generating portion, thereby receiving an offer of the service.

2. The bidirectional communication system according to claim 1, wherein the first communication processing portion of the client gives the access to the access accepting portion by using a connection address obtained by adding predetermined identification information to an IP address, and

the address generating portion of the server exchanges, into the optional identification information, the predetermined identification information given to the IP address sent with the conversion from the global address to the local address through the router, thereby generating the new connection address.

3. A server apparatus having such a structure as to be connectable to a client through a router on internet and to offer a service to meet a demand sent from the client by application software, comprising:

an access accepting portion for accepting access to be given from the client through the router in order to demand a service;

an address generating portion for giving optional identification information to an IP address sent with a conversion from a global address to a local address by the router, thereby generating a new connection address when the access is accepted by the access accepting portion;

an identification information notifying portion for notifying the client of the identification information through the router by using the new connection address generated by the address generating portion; and

a communication process generating portion for generating a communication process for carrying out a communication with the client based on the new connection address generated by the address generating portion,

wherein the communication process generated by the communication process generating portion is constituted to communicate with the client by using the new connection address.