System and method for selecting power control modes

• US 6,185,432 B1
• Filed: 09/30/1998
• Issued: 02/06/2001
• Est. Priority Date: 10/13/1997
• Status: Expired due to Term

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Vembu, Sridhar
• Primary Examiner(s): TO, DORIS HA
• Application Number:
  US09/164,383
• Time in Patent Office: 860 Days
• Field of Search: 455/522, 455/68, 455/69, 455/70, 370/342, 370/318
• US Class Current: 455/522
• CPC Class Codes: H04W 52/12 Outer and inner loops
• CPC Class Codes: H04W 52/20 using error rate
• CPC Class Codes: H04W 52/24 using SIR [Signal to Interference Ratio] or other wireless path parameters
• CPC Class Codes: H04W 52/36 with a discrete range or set of values, e.g. step size, ramping or offsets
• CPC Class Codes: H04W 52/362 Aspects of the step size
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range

Abstract

A system and method for switching between power control modes is implemented in a communication system having two or more power control modes for providing a power increase for a transmitted signal. The system and method determine whether performance of the communication system is within nominal bounds. If the performance of the communication system is within nominal bounds, a first mode of power control is selected for controlling transmitter power. If the performance of the communication system is not within the nominal bounds, a second mode of power control for controlling a transmitter is selected.

Claims

1. A system for selecting one of a plurality of power control modes for a transmitter operating in a communication system, the communication system having a first mode of providing one or more power increases of a first amount and a second mode for providing one or more power increases of a second amount, comprising:

means for determining whether performance of the communication system is within nominal bounds;

means for selecting the first mode of power control for controlling transmitter power if the performance of the communication system is within nominal bounds; and

means for continuously selecting the second mode of power for controlling the transmitter to maintain the communication system performance within the nominal bounds, if the performance of the communication system is not within nominal bounds;

wherein the first mode is a tracking mode of power control and the second mode is a burst mode of power control, and

wherein the burst mode of power control provides a greater increase in power than the tracking control of power control when system performance is below a threshold level.

2. The system of claim 1, wherein said performance of the communication system is measured according to one or more of the group comprising signal-to-noise ratio, frame error rate frequency, number of consecutive frame errors, and bit-error rate.

3. The system of claim 2, wherein said performance of the communication system is measured according to a signal-to-noise ratio.

4. The system of claim 1, wherein said means for determining whether performance of the communication system is within nominal bounds comprises means for determining whether a transmitted signal is at, above or below a threshold level.

5. The system of claim 1, wherein said means for determining whether performance of the communication system is within nominal bounds comprises means for determining whether a parameter of the communication system is within a defined range.

6. The system of claim 5, wherein said parameter is chosen from the group comprising signal-to-noise ratio, frame error rate frequency, number of consecutive frame errors, and bit-error rate.

7. The system of claim 6, wherein said performance of the communication system is measured according to a signal-to-noise ratio.

8. The system of claim 1, wherein said increase in power is an incremental power increase.

9. The system of claim 1, wherein said means for selecting the first and second modes of power are located at the transmitter.

10. The system of claim 9, wherein said means for selecting the first and second modes of power are located at a receiver location remote from the transmitter and further comprising means for transmitting a command from the receiver location to the transmitter to select a desired mode.

11. A method of selecting one of a plurality of power control modes for a transmitter operating in a communication system, the communication system having a first mode for providing one or more power increases of a first amount and a second mode for providing one or more power increases of a second amount, the method comprising the steps of:

determining whether performance of the communication system is within nominal bounds;

selecting the first mode of power control for controlling transmitter power if the performance of the communication system is within nominal bounds; and

continually selecting the second mode of power control for controlling the transmitter to maintain the communication system performance within the nominal bounds, if he performance of the communication system is not within nominal bounds;

wherein the first mode is a tracking mode of power control and the second mode is a burst mode of power control, and

wherein the burst mode of power control provides a greater increase in power than the tracking control of power control when system performance is below a threshold level.

12. The method of claim 11, wherein said performance of the communication system is measured according to one or more of the group comprising signal-to-noise ratio, frame error rate frequency, number of consecutive frame errors, and bit-error rate.

13. The method of claim 11, wherein said step of determining whether performance of the communication system is within nominal bounds comprises a step of determining whether said transmitted signal is at, above or below a threshold level.

14. The method of claim 11, wherein said step of determining whether performance of the communication system is within nominal bounds comprises a step of determining whether a parameter of the communication system is within a defined range.

15. The method of claim 14, wherein said parameter is chosen from the group comprising signal-to-noise ratio, frame error rate frequency, number of consecutive frame errors, and bit-error rate.

16. The method claim 11, wherein said increase in power is an incremental power increase.

17. The method of claim 11, wherein said steps of selecting the first and second modes of power are performed at the transmitter.

18. The method of claim 17, wherein said steps of selecting the first and second modes of power are performed at a receiver location remote from the transmitter and further comprise a step of transmitting a command from the receiver location to the transmitter to select a desired mode.

19. The method of claim 12, wherein said performance of the communication system is measured according to a signal-to-noise ratio.

20. The method of claim 15, wherein said performance of the communication system is measured according to a signal-to-noise ratio.