RELAY DEVICE AND PROGRAM PRODUCT

• US 20080046574A1
• Filed: 07/03/2007
• Published: 02/21/2008
• Est. Priority Date: 07/03/2006
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Takahashi, Yasuhiro, Takeshima, Yoshiteru, Kinoshita, Masafumi, Nakahara, Masahiko, Nakashiro, Koki
• Granted Patent: US 8,099,510 B2
• Time in Patent Office: Days
• US Class Current: 709/228
• CPC Class Codes: H04L 67/02 based on web technology, e.g. hypertext transfer protocol [HTTP]
• CPC Class Codes: H04L 67/56 Provisioning of proxy services store-and-forward switching systems in data switching networks H04L12/54
• CPC Class Codes: H04L 67/568 Storing data temporarily at an intermediate stage, e.g. caching
• CPC Class Codes: H04L 67/59 Providing operational support to end devices by off-loading in the network or by emulation, e.g. when they are unavailable

Abstract

A communication system in which, even when an HTTP session is disconnected from a mobile device, the HTTP session can be continued or a response from a Web server can be returned to a user, without installing a special application in the mobile device. A load-distributable system is provided for realizing such operation. To that end, in a communication system having a relay device that relays a request from a portable telephone terminal (110) to a Web server (120), the relay device (130) relays a processing request from the portable telephone terminal (110) to the Web server, and stores a processing response from the Web server. The relay device (130) sends the portable telephone terminal a message to the effect that the processing response should be acquired from the relay device (130) or a message with the processing response added.

Claims

1. A relay device that relays communication between a communication terminal and a communication server, the apparatus comprising:

a storage part that stores a response from the communication server; and

a control part that controls processing of sending a message, according to a predetermined protocol, to the communication terminal when the response is received.

2. A relay device of claim 1, wherein:

the protocol makes the communication terminal send a request for receiving the response.

3. A relay device of claim 1, wherein:

the protocol sends, to the communication terminal, a message with the response attached.

4. A relay device of claim 1, wherein:

the control part selects one protocol of;

a push-type protocol that makes the communication terminal send a receiving request for the response, a mail protocol that sends, to the communication terminal a message with the response added, and HTTP protocol.

5. A relay device of claim 4, wherein:

the control part changes protocols by judging a condition of at least one of a line to the communication terminal and a line to the communication server.

6. A relay device of claim 5, wherein:

the control part changes protocols when disconnection of a session with the communication terminal is detected a predetermined number of times.

7. A relay device of claim 5, wherein:

the control part changes protocols in one case of;

a case in which a time-out period for a session with the communication server elapses and a case in which a session with the communication server is disconnected.

8. A relay device of claim 5, wherein:

the control part changes protocols when number of lines of communication terminals connected to the relay device reaches a predetermined number.

9. A relay device of claim 5, wherein:

the relay device has a CPU and a memory; and

the control part changes protocols when usage rate of one of the CPU and the memory exceeds a predetermined value.

10. A relay device of claim 1, wherein:

when a predetermined character string exists in a request from the communication terminal to the communication server, the control part controls processing of sending, to the communication terminal, a message that changes a time-out period for a session from the communication terminal to the communication server.

11. A program product having a medium that provides an program executable on a computer, the program product comprising code such that the program makes the computer store a response from a communication server;

and

control processing of relaying a request from a communication terminal to the communication server, and processing of sending a message according to a predetermined protocol, to the communication terminal, when the response is received.

12. A program product of claim 11, wherein:

the protocol makes the communication terminal send a request for receiving the response.

13. A program product of claim 11, wherein:

the protocol sends, to the communication terminal, a message with the response added.

14. A program product of claim 11, wherein:

the control unit selects one protocol of;

a push-type protocol that makes the communication terminal send a receiving request for the response, a mail protocol that sends, to the communication terminal, a message with the response added, and HTTP protocol.

15. A program product of claim 14, wherein:

the control unit changes protocols by judging a condition of at least one of a line to the communication terminal and a line to the communication server.

16. A program product of claim 15, wherein:

the control unit changes protocols when disconnection of a session with the communication terminal is detected a predetermined number of times.

17. A program product of claim 15, wherein:

the control unit changes protocols in one case of;

a case in which a time-out period for a session with the communication server elapses, and a case in which a session with the communication server is disconnected.

18. A program product of claim 15, wherein:

the control unit changes protocols when number of lines of communication terminals connected to the computer reaches a predetermined number.

19. A program product of claim 15, wherein:

the computer has a CPU and a memory; and

the control unit changes protocols when usage rate of one of the CPU and the memory exceeds a predetermined value.

20. A program product of claim 11, wherein:

when a predetermined character string exists in a request from the communication terminal to the communication server, the control unit is made to control processing of sending, to the communication terminal, a message that changes a time-out period for a session from the communication terminal to the communication server.