System for enabling a receiver for only a fix amount of time and disabling the receiver thereafter

• US 6,668,329 B1
• Filed: 09/09/1999
• Issued: 12/23/2003
• Est. Priority Date: 09/09/1999
• Status: Expired due to Term

• Current Assignee: MOSAID Technologies Inc. (f/k/a Conversant Intellectual Property Management)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Smith, Kevin N, Hariri, Steven D, Rudd, Michael L
• Primary Examiner(s): Lee, Thomas
• Assistant Examiner(s): SURYAWANSHI, SURESH
• Application Number:
  US09/392,424
• Time in Patent Office: 1,566 Days
• Field of Search: 713/320, 713/401, 709/232, 370/311
• US Class Current: 713/320
• CPC Class Codes: H04B 10/114 Indoor or close-range type systems
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Disclosed is a method for conserving power in a battery-powered electronic appliance having a communications interface including receive mode circuitry and a battery that supplies power to the receive mode circuitry when the receive mode circuitry is enabled. Upon power up of the appliance, the communications interface is initialized, and the receive mode circuitry is enabled to operate in a receive mode. A predetermined enable time is then timed. When the predetermined enable time expires, the receive mode circuitry is disabled.

Claims

1. A method for conserving power in a battery-powered, functionally discrete, computer peripheral, said computer peripheral comprising a communications interface comprising receive mode circuitry and a battery that supplies power to said receive mode circuitry when said receive mode circuitry is enabled, said method comprising the steps of:

upon power up of said functionally discrete, computer peripheral, initializing said communications interface and enabling said receive mode circuitry to operate in a receive mode for direct communication with other devices;

timing a predetermined enable time; and

disabling said receive mode circuitry when said predetermined enable time expires.

2. A method in accordance with claim 1, wherein:

said enabling step comprises supplying said battery power to said receive mode circuitry.

3. A method in accordance with claim 2, wherein:

said disabling step comprises not supplying said battery power to said receive mode circuitry.

4. A method in accordance with claim 1, wherein:

if said predetermined enable time expires and said receive mode circuitry is currently receiving input, timing a predetermined enable extension time; and

when said predetermined enable extension time expires, repeating said timing a predetermined enable extension time until said receive mode circuitry is no longer receiving input.

5. A method in accordance with claim 1, comprising:

after said disabling step, timing a predetermined disable time; and

repeating said enabling step through said repeating step.

6. A method in accordance with claim 5, wherein:

if said predetermined enable time expires and said receive mode circuitry is currently receiving input, timing a predetermined enable extension time; and

when said predetermined enable extension time expires, repeating said timing a predetermined enable extension time until said receive mode circuitry is no longer receiving input.

15. A method in accordance with claim 1, wherein said computer peripheral is selected from a group consisting of:

a printer, a scanner, a whiteboard, an overhead projector, and a facsimile machine.

16. A method in accordance with claim 1, wherein said communications interface is an IR interface.

7. A functionally discrete computer peripheral that is powered by a battery, comprising:

a communications interface comprising receive mode circuitry that allows said functionally discrete computer peripheral to receive input, said receive mode circuitry receiving power from said battery when said receive mode circuitry is enabled;

a program memory;

an automatic receive mode process, stored in said program memory, which upon power up of said computer peripheral, i) enables said receive mode circuitry to operate in said receive mode for direct communication with other devices, ii) times a predetermined receive mode enable time, and iii) disables said receive mode circuitry when said predetermined receive mode enable time expires; and

a processor which executes said automatic receive mode process.

8. A functionally discrete computer peripheral in accordance with claim 7, comprising:

a timer which times said receive mode enable time and alerts said processor when said receive mode enable time expires.

17. A computer peripheral in accordance with claim 7, wherein said computer peripheral is selected from a group consisting of:

a printer, a scanner, a whiteboard, an overhead projector, and a facsimile machine.

18. A computer peripheral in accordance with claim 7, wherein said communications interface is an IR interface.

9. A computer readable storage medium tangibly embodying program instructions for conserving power in a battery-powered, functionally discrete, computer peripheral, said computer peripheral comprising a communications interface comprising receive mode circuitry and a battery that supplies power to said receive mode circuitry when said receive mode circuitry is enabled, said program instructions comprising instructions for:

upon power up of said functionally discrete computer peripheral, initializing said communications interface and enabling said receive mode circuitry to operate in a receive mode for direct communication with other devices;

timing a predetermined enable time;

disabling said receive mode circuitry when said predetermined enable time expires.

10. A computer readable storage medium in accordance with claim 9, wherein:

said program instructions for enabling said receive mode circuitry comprise instructions for supplying said battery power to said receive mode circuitry.

11. A computer readable storage medium in accordance with claim 10, wherein:

said program instructions for disabling said receive mode circuitry comprise instructions for not supplying said battery power to said receive mode circuitry.

12. A computer readable storage medium in accordance with claim 9, further comprising program instructions for:

if said predetermined enable time expires and said receive mode circuitry is currently receiving input, timing a predetermined enable extension time; and

when said predetermined enable extension time expires, repeating said timing a predetermined enable extension time until said receive mode circuitry is no longer receiving input.

13. A computer readable storage medium in accordance with claim 9, further comprising program instructions for:

after said disabling step, timing a predetermined disable time; and

repeating said enabling step through said repeating step.

14. A computer readable storage medium in accordance with claim 13, further comprising program instructions for:

if said predetermined enable time expires and said receive mode circuitry is currently receiving input, timing a predetermined enable extension time; and

when said predetermined enable extension time expires, repeating said timing a predetermined enable extension time until said receive mode circuitry is no longer receiving input.

19. A computer readable storage medium in accordance with claim 9, wherein said computer peripheral is selected from a group consisting of:

a printer, a scanner, a whiteboard, an overhead projector, and a facsimile machine.

20. A computer readable storage medium in accordance with claim 9, wherein said communications interface is an IR interface.

21. A system, comprising:

at least two functionally discrete computer peripherals, powered by batteries, each comprising;

an infrared communications interface comprising receive mode circuitry that allows said computer peripheral to receive input directly from another of the computer peripherals, said receive mode circuitry receiving power from said battery when said receive mode circuitry is enabled;

a program memory;

an automatic receive mode process, stored in said program memory, which upon power up of said computer peripheral, i) enables said receive mode circuitry to operate in said receive mode for direct communication with other devices, ii) times a predetermined receive mode enable time, and iii) disables said receive mode circuitry when said predetermined receive mode enable time expires; and

a processor which executes said automatic receive mode process.

22. The system of claim 21, wherein said computer peripherals are selected from a group consisting of:

a printer, a scanner, a whiteboard, an overhead projector, and a facsimile machine.