Reverse-link power control overshoot considering mobile station transmission limitations

• US 6,829,468 B2
• Filed: 03/05/2001
• Issued: 12/07/2004
• Est. Priority Date: 03/05/2001
• Status: Expired due to Fees

• Current Assignee: LGS Innovations LLC (CACI International Incorporated)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Song, Lei, Vitebsky, Stanley, Gandhi, Asif Dawoodi, Thomas, Mathew, Ibanez, Marc Benedict
• Primary Examiner(s): Milord, Marceau
• Application Number:
  US09/797,708
• Publication Number:
  US 20030022630A1
• Time in Patent Office: 1,373 Days
• Field of Search: 455/69, 455/522, 455/574, 455/63.1, 455/524, 455/67.11, 455/13.4, 370/335, 370/252, 370/318
• US Class Current: 455/69
• CPC Class Codes: H04W 52/228 using past power values or information
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range

Abstract

In a method for minimizing reverse link power control overshoot in a wireless communications system, the output power of a mobile station is detected to determine whether it falls outside a dynamic range of the mobile station. If outside the dynamic range, a new output power falling within the dynamic range is calculated and set, and the mobile station is instructed to transmit at the new output power.

Claims

1. A method of minimizing reverse link power control overshoot in a communications environment, the method comprising:

receiving a transmission from a mobile station at a first output power level;

determining whether the mobile station should adjust its output power level based on the communications environment;

instructing the mobile station to calculate a second output power level based on an output power level range of the mobile station, if output power level adjustment is required; and

instructing the mobile station to transmit at the second output power level, if output power level adjustment is required.

2. The method of claim 1, wherein the second output power level is obtained by instructing the mobile station to increase its output power level by a first amount when the first output power level is below a lower limit of the output power level range.

3. The method of claim 2, wherein the second output power level is obtained by instructing the mobile station to decrease its output power by a second amount when the first output power level is greater than an upper limit of the output power level range.

4. The method of claim 3, wherein the first amount and the second amount are equal.

5. The method of claim 1, wherein the second output power level is obtained by instructing the mobile station to decrease its output power by a first amount when the first output power level is greater than an upper limit of the output power level range.

6. The method of claim 1, further comprising a step of establishing a communications link with the mobile station upon completing output power level adjustment.

7. A method of minimizing reverse link power control overshoot comprising:

detecting whether a current output power of a mobile station falls outside a dynamic range of mobile station output power levels;

instructing the mobile station to adjust its output power towards the dynamic range to obtain an adjusted output power, if the detected output power falls outside the dynamic range; and

instructing the mobile station to transmit at the adjusted output power, if the detected output power falls outside the dynamic range.

8. The method of claim 7, wherein the adjusted output power is obtained by instructing the mobile station to increase its output power by a first amount when the detected current output power is below a lower limit of the dynamic range.

9. The method of claim 8, wherein the adjusted output power is obtained by instructing the mobile station to decrease its output power by a second amount when the detected current output power is greater than an upper limit of the dynamic range.

10. The method of claim 9, wherein the first amount and the second amount are equal.

11. The method of claim 7, wherein the adjusted output power is obtained by instructing the mobile station to decrease its output power by a first amount when the detected current output power is greater than an upper limit of the dynamic range.

12. A method of minimizing reverse link power control overshoot in a communications environment, the method comprising:

transmitting at a first output power level;

receiving instructions to adjust the first output power level, if output power level adjustment is required;

calculating a second output power level based upon an output power level range in accordance with the received instructions; and

transmitting at the second output power level.

13. The method of claim 12, wherein the second output power level is obtained by increasing the first output power level by a first amount when the first output power level is below a lower limit of the output power level range.

14. The method of claim 13, wherein the second output power level is obtained by decreasing the first output power level by a second amount when the first output power level is greater than an upper limit of the output power level range.

15. The method of claim 14, wherein the first amount and the second amount are equal.

16. The method of claim 12, wherein the second output power level is obtained by decreasing the first output power level by a first amount when the first output power level is greater than an upper limit of the output power level range.

17. The method of claim 12, further comprising a step of establishing a communications link upon completing output power level adjustment.

18. A method of minimizing reverse link power control overshoot comprising:

transmitting at a first output power;

receiving instructions to adjust the first output power towards a dynamic range of mobile station output power levels to obtain a second output power, if the first output power falls outside the dynamic range; and

transmitting at the second output power if the first output power falls outside the dynamic range.

19. The method of claim 18, wherein the second output power is obtained by increasing the first output power by a first amount when the first output power is below a lower limit of the dynamic range.

20. The method of claim 19, wherein the second output power is obtained by decreasing the first output power by a second amount when the first output power is greater than an upper limit of the dynamic range.

21. The method of claim 20, wherein the first amount and the second amount are equal.

22. The method of claim 18, wherein the second output power is obtained by decreasing the detected output power by a first amount when the detected output power is greater than an upper limit of the dynamic range.