Session Relaying Apparatus, Session Relay Method, and Session Relay Program

• US 20080285447A1
• Filed: 12/01/2004
• Published: 11/20/2008
• Est. Priority Date: 12/03/2003
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Yamasaki, Yasuhiro
• Granted Patent: US 8,793,394 B2
• Time in Patent Office: Days
• US Class Current: 370/231
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/30 in combination with information about buffer occupancy at either end or at transit nodes
• CPC Class Codes: H04L 67/14 Session management for real-time applications in data packet communications networks H04L65/1066
• CPC Class Codes: H04L 67/568 Storing data temporarily at an intermediate stage, e.g. caching
• CPC Class Codes: H04L 69/16 Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• CPC Class Codes: H04L 69/163 In-band adaptation of TCP data exchange; In-band control procedures

Abstract

In a data reception processor (210a) in a session relaying apparatus (20-3), a data amount monitor (201) monitors the data amount within the session relaying apparatus (20-3), a receivable amount calculating unit (212) requires a data receivable amount which is informed from the session relaying apparatus (20-3) to a data transmission terminal (10) in a devaluating way according to a predetermined function, a receivable amount informing unit (213) informs the data transmission terminal (10) of the value, and in the data output processor (220a), an initialization judging unit (223) makes a judgment about initialization of the transmission amount, according to the amount resulting from the data monitor (201) monitoring the data amount within the session relaying apparatus (20-3), and a transmissive amount calculating unit (222) determines the data transmissive amount by using the result.

Claims

1. A session relay method for relaying a session between a data transmission terminal and a data reception terminal, comprising the steps of:

a step of monitoring data amount within a data storing unit;

a step of requiring a receivable amount to take a value smaller than empty data amount of the data storing unit, obtained according to said data amount; and

a step of informing the data transmission terminal of said receivable amount.

4. The session relay method as set forth in claim 1 or claim 3, further comprising

a step of setting a plurality of thresholds for said empty data amount within the data storing unit and determining a receivable amount to take a value smaller than said empty data amount within the data storing unit, according to another function within a range of the respective thresholds.

5. The session relay method as set forth in claim 1 or claim 3, comprising

a step of setting a plurality of thresholds for said empty data amount within the data storing unit and fixing a value in proportion to one divided by positive of said empty data amount within the data storing unit, a value in proportion to a value multiplied by positive of said empty data amount within the data storing unit, a fixed value less than the empty data amount within the data storing unit, or a value required in these combination, as a receivable amount, within the range of the respective thresholds.

6. The session relay method as set forth in claim 1 or claim 3, comprising

a step of setting a plurality of thresholds for said empty data amount within the data storing unit and fixing as a receivable amount, a value of a function which decreases monotonously according as the empty data amount within the data storing unit decreases, which is continuous on the whole and gets a value smaller than said empty data amount within the data storing unit, using the individual function for each threshold.

2. A session relay method for relaying a session between a data transmission terminal and a data reception terminal, comprising the steps of:

a step of determining transmissive amount in data transmission processing, according to a judgment result whether transmission amount is reduced or not, when transmission data based on the monitoring result of the data amount within the data storing unit and a network situation, does not exist for a predetermined period.

7. The session relay method as set forth in claim 2 or claim 3, comprising

a step of judging whether the transmissive amount is reduced or not, according to information for specifying a user such as IP address, ID of VLAN, and MAC address, information for specifying an application such as port number of TCP, and information for specifying priority of data such as TOS field in the IP header, priority in the VLAN header, and priority in the MPLS header.

8. The session relay method as set forth in claim 2 or claim 3, comprising

a step of judging that the transmissive amount is initialized when the data storing unit continues empty of data for a predetermined period.

9. The session relay method as set forth in claim 2 or claim 3, comprising

a step of judging that the transmissive amount is initialized when the data storing unit continues empty of data for a predetermined period, said predetermined period being determined according to the information for specifying a user such as IP address, ID of VLAN, and MAC address, the information for specifying an application such as port number of TCP, and the information for specifying priority of data such as TOS field in IP header, priority in VLAN header, and priority in MPLS header.

10. The session relay method as set forth in claim 2 or claim 3, comprising a step of judging that the transmissive amount is not initialized.

3. A session relay method for relaying a session between a data transmission terminal and a data reception terminal, comprising the steps of:

a step of monitoring data amount within a data storing unit;

a step of requiring a receivable amount to take a value smaller than empty data amount of the data storing unit, obtained according to said data amount as a transmissive amount to be informed to the data transmission terminal; and

a step of determining data transfer amount in data transmission processing, according to a judgment result whether transmission amount is reduced or not when transmission data based on the monitoring result of the data amount within the data storing unit and a network situation does not exist for a predetermined period.

11. A session relaying apparatus for relaying a session between a data transmission terminal and a data reception terminal, comprising:

a unit which receives data transmitted from the data transmission terminal;

a unit which monitors data amount within a data storing unit;

a unit which requires a receivable amount to take a value smaller than said data amount; and

a unit which creates an acknowledgement signal based on said receivable amount and transmits the signal to the data transmission terminal.

14. The session relaying apparatus as set forth in claim 11 or claim 13, in which

a plurality of thresholds is set for said empty data amount within the data storing unit, and a receivable amount is determined to take a value smaller than said empty data amount within the data storing unit, according to another function within a range of the respective thresholds.

15. The session relaying apparatus as set forth in claim 11 or claim 13, in which

a plurality of thresholds are set for said empty data amount within the data storing unit, and a value in proportion to one divided by positive of said empty data amount within the data storing unit, a value in proportion to a value multiplied by positive of said empty data amount within the data storing unit, a fixed value less than said empty data amount within the data storing unit, or a value required in these combination, is fixed as a receivable amount within the range of the respective thresholds.

16. The session relaying apparatus as set forth in claim 11 or claim 13, in which

a plurality of thresholds are set for said empty data amount within the data storing unit, and a value of a function which decreases monotonously according as said empty data amount within the data storing unit decreases, which is continuous on the whole and gets a value smaller than the empty data amount within the data storing unit, is fixed as the receivable amount, using the individual function for each threshold.

12. A session relaying apparatus for relaying a session between a data transmission terminal and a data reception terminal, comprising:

a unit which receives an acknowledgement signal from the data reception terminal;

a unit which monitors data amount within a data storing unit;

an initialization judging unit which judges whether transmission amount is reduced or not when transmission data does not exist for a predetermined period based on a network situation; and

a unit which determines transmissive amount according to the monitoring result of said data monitor and the judgment of said initialization judging unit and transmits the data.

17. The session relaying apparatus as set forth in claim 12 or claim 13, in which

whether the transmissive amount is reduced or not, is judged, according to information for specifying a user such as IP address, ID of VLAN, and MAC address, information for specifying an application such as port number of TCP, and information for specifying priority of data such as TOS field in the IP header, priority in the VLAN header, and priority in the MPLS header.

18. The session relaying apparatus as set forth in claim 12 or claim 13, in which

said initialization judging unit judges that the transmissive amount is initialized when the data storing unit continues empty of data for a predetermined period.

19. The session relaying apparatus as set forth in claim 12 or claim 13, in which

said initialization judging unit judges that the transmissive amount is initialized when the data storing unit continues empty of data for a predetermined period, said predetermined period being determined according to the information for specifying a user such as IP address, ID of VLAN, and MAC address, the information for specifying an application such as port number of TCP, and the information for specifying priority of data such as TOS field in IP header, priority in VLAN header, and priority in MPLS header.

20. The session relaying apparatus as set forth in claim 12 or claim 13, in which

said initialization judging unit judges that the transmissive amount is not initialized.

13. A session relaying apparatus for relaying a session between a data transmission terminal and a data reception terminal, comprising:

a unit which receives data transmitted from the data transmission terminal;

a unit which monitors data amount within a data storing unit;

a unit which requires a receivable amount to take a value smaller than said data amount;

a unit which informs the data transmission terminal of said receivable amount;

a unit which creates an acknowledgement signal based on said informed amount;

a unit which receives an acknowledgement signal from the data reception terminal;

an initialization judging unit which judges whether transmission amount is reduced or not when transmission data does not exist for a predetermined period based on a network situation; and

a unit which determines transmissive amount according to the monitoring result of said data monitor and the judgment of said initialization judging unit and transmits the data.

21. A session relay program for relaying a session between a data transmission terminal and a data reception terminal, executed on a computer, comprising the function of:

a function of monitoring data amount within a data storing unit, requiring a receivable amount to take a value smaller than empty data amount of the data storing unit, obtained according to said data amount, and informing the data transmission terminal of said receivable amount.

24. The session relay program as set forth in claim 21 or claim 23, comprising

a function of setting a plurality of thresholds for said empty data amount within the data storing unit and determining a receivable amount to take a value smaller than said empty data amount within the data storing unit, according to another function within a range of the respective thresholds.

25. The session relay program as set forth in claim 21 or claim 23, comprising

a function of setting a plurality of thresholds for said empty data amount within the data storing unit and fixing a value in proportion to one divided by positive of said empty data amount within the data storing unit, a value in proportion to a value multiplied by positive of said empty data amount within the data storing unit, a fixed value less than the empty data amount within the data storing unit, or a value required in these combination, as a receivable amount, within the range of the respective thresholds.

26. The session relay program as set forth in claim 21 or claim 23, comprising

a function of setting a plurality of thresholds for said empty data amount within the data storing unit and fixing as the receivable amount, a value of a function which decreases monotonously according as the empty data amount within the data storing unit decreases, which is continuous on the whole and gets a value smaller than said empty data amount within the data storing unit, using the individual function for each threshold.

22. A session relay program for relaying a session between a data transmission terminal and a data reception terminal, executed on a computer, comprising the function of:

a function of determining transmissive amount in data transmission processing, according to a judgment result whether transmission amount is reduced or not, when transmission data based on the monitoring result of the data amount within the data storing unit and a network situation, does not exist for a predetermined period.

27. The session relay program as set forth in claim 22 or claim 23, comprising

a function of judging whether the transmissive amount is reduced or not, according to information for specifying a user such as IP address, ID of VLAN, and MAC address, information for specifying an application such as port number of TCP, and information for specifying priority of data such as TOS field in the IP header, priority in the VLAN header, and priority in the MPLS header.

28. The session relay program as set forth in claim 22 or claim 23, comprising

a function of judging that the transmissive amount is initialized when the data storing unit continues empty of data for a predetermined period.

29. The session relay program as set forth in claim 22 or claim 23, comprising

a function of judging that the transmissive amount is initialized when the data storing unit continues empty of data for a predetermined period, said predetermined period being determined according to the information for specifying a user such as IP address, ID of VLAN, and MAC address, the information for specifying an application such as port number of TCP, and the information for specifying priority of data such as TOS field in IP header, priority in VLAN header, and priority in MPLS header.

30. The session relay program as set forth in claim 22 or claim 23, comprising a function of judging that the transmissive amount is not initialized.

23. A session relay program for relaying a session between a data transmission terminal and a data reception terminal, executed on a computer, comprising the function of:

a function of monitoring data amount within a data storing unit, requiring a value smaller than empty data amount of the data storing unit, obtained according to said data amount as a receivable amount to be informed to the data transmission terminal, and determining data transfer amount in data transmission processing, according to a judgment result whether transmission amount is reduced or not when transmission data based on the monitoring result of the data amount within the data storing unit and a network situation does not exist for a predetermined period.