Power shutoff method for TCP/IP network device and recording medium recording the program therefor

• US 20010003164A1
• Filed: 12/01/2000
• Published: 06/07/2001
• Est. Priority Date: 12/03/1999
• Status: Active Grant

• Current Assignee: Rakuten Group, Inc.
• Original Assignee: NEC Corporation
• Inventors: Murakami, Takuya
• Granted Patent: US 6,760,853 B2
• Time in Patent Office: Days
• US Class Current: 700/22
• CPC Class Codes: G06F 1/26 Power supply means, e.g. regulation thereof for memories G11C

Abstract

According to the power shutoff method for the TCP/IP network device, the connection status of the terminal connected to the TCP/IP network is monitored, whether the power can be shut off or not is judged based on the result of the monitoring, and the power for the terminal is shut off when it is judged acceptable to shut off the power in the judgment step.

Claims

1. A power shutoff method for the TCP/IP network device comprising the steps of:

a step to monitor the connection status of the terminal connected to the TCP/IP network and judge whether the power for said terminal can be shut off according to the result of said monitoring; and

a step to shut off the power for said terminal when it is judged acceptable to shut off the power in said judgment step.

2. A power shutoff method for the TCP/IP network device as set forth in

claim 1

further comprising:

a step to provide a power shutoff permit notice to said terminal when the power shutoff for said terminal is judged acceptable, and

a step to shut off the power for said terminal upon receipt of said power shutoff permit notice.

3. A power shutoff method for the TCP/IP network device as set forth in

claim 1

, wherein

the power shutoff is judged acceptable in said judgment step

when said connection status satisfies all of these conditions:

TCP send buffer is empty;

Delayed ACK is not in operation; and

TCP status is not any of SYN_RCVD, SYN_SENT, LAST_ACK, FIN_WAIT_1 and CLOSING.

4. A power shutoff method for the TCP/IP network device as set forth in

claim 1

, wherein

the connection status of the terminal connected to the TCP/IP network is monitored all the time and said judgment step is executed all the time.

5. A power shutoff method for the TCP/IP network device as set forth in

claim 1

, wherein

said judgment step is executed only when the power shutoff is requested by the application of said terminal.

6. A power shutoff method for the TCP/IP network device as set forth in

claim 1

, wherein

said terminal is a portable terminal.

7. A computer readable memory storing the program which controls the computer and shuts off the power for the TCP/IP network device,

said program

monitoring the connection status of the terminal connected to the TCP/IP network and judging whether the power for said terminal can be shut off according to the result of said monitoring, and

executing the power shutoff for said terminal when it is judged acceptable to shut off the power in said judgment step.

8. A computer readable memory storing the program for power shutoff processing of the TCP/IP network device as set forth in

claim 7

, wherein

said program

provides a power shutoff permit notice to said terminal when it is judged acceptable to shut off the power for said terminal and the power shutoff processing is executed for said terminal upon receipt of said power shutoff permit notice.

9. A computer readable memory storing the program for power shutoff processing of the TCP/IP network device as set forth in

claim 7

, wherein

said program judges it acceptable to shut off the power

when said connection status satisfies all of these conditions:

TCP send buffer is empty;

Delayed ACK is not in operation; and

TCP status is not any of SYN_RCVD, SYN-SENT, LAST_ACK, FIN WAIT1 and CLOSING.

10. A computer readable memory storing the program for power shutoff processing of the TCP/IP network device as set forth in

claim 7

, wherein

the connection status of the terminal connected to the TCP/IP network is monitored all the time and said judgment step is executed all the time.

11. A computer readable memory storing the program for power shutoff processing of the TCP/IP network device as set forth in

claim 7

, wherein

said judgment step is executed only when the power shutoff is requested by the application of said terminal.

12. A computer readable memory storing the program for power shutoff processing of the TCP/IP network device as set forth in

claim 7

, wherein

said terminal is a portable terminal.