USER EQUIPMENT FOR CONTROLLING TRANSMISSION POWER LEVELS

• US 20090080496A1
• Filed: 12/09/2008
• Published: 03/26/2009
• Est. Priority Date: 03/22/2000
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Shin, Sung-Hyuk, Dick, Stephen G., Zeira, Ariela
• Granted Patent: US 8,842,711 B2
• Time in Patent Office: Days
• US Class Current: 375/130
• CPC Class Codes: H04W 52/12 Outer and inner loops
• CPC Class Codes: H04W 52/225 Calculation of statistics, e.g. average, variance
• CPC Class Codes: H04W 52/24 using SIR [Signal to Interference Ratio] or other wireless path parameters

Abstract

A user equipment (UE) with circuitry configured to determine a pathloss associated with a received signal. The circuitry is configured to receive an adjustment and adjust a value in response to the received adjustment. The circuitry is configured to determine a transmit power level based on multiplying the determined pathloss by a parameter and adding the adjusted value to a result of the multiplying, wherein the parameter is value in the range of 0 to 1. The circuitry is configured to transmit a signal at the determined transmit power level.

Claims

1. A user equipment comprising:

circuitry configured to determine a pathloss associated with a received signal;

circuitry configured to receive an adjustment and adjust a value in response to the received adjustment;

circuitry configured to determine a transmit power level based on multiplying the determined pathloss by a parameter and adding the adjusted value to a result of the multiplying;

wherein the parameter is value in the range of 0 to 1; and

circuitry configured to transmit a signal at the determined transmit power level.

2. The user equipment of claim 1 wherein the pathloss is derived by measuring a received power level of the received signal.

3. The user equipment of claim 1 wherein the pathloss is derived by measuring a received power level of a control channel.

4. The user equipment of claim 1 wherein the pathloss is derived by measuring a received power level of a broadcast control channel.

5. The user equipment of claim 1 wherein the circuitry configured to determine the transmit power level is based on the multiplying the determined pathloss by the parameter and adding the adjusted value to the result of the multiplication and at least one other value received by the user equipment from a base station.

6. The user equipment of claim 1 wherein the adjustment is a power control adjustment.

7. The user equipment of claim 6 wherein the adjustment is an outer loop power control adjustment.

8. The user equipment of claim 1 wherein the circuitry for transmitting the signal transmits the signal over at least one time slot of a radio frame divided into time slots.

9. The user equipment of claim 8 comprising circuitry configured to transmit a subsequent signal over a subsequent at least one time slot and a transmit power level of the subsequent signal is determined by multiplying an updated determined pathloss by the parameter and adding an updated adjusted value to a result of the multiplication of the updated determined pathloss.

10. The user equipment of claim 1 comprising an antenna for radiating the transmitted signal.

11. The user equipment of claim 1 comprising circuitry operatively coupled to the antenna to demodulate signals received by the antenna to produce a baseband signal.

12. The user equipment of claim 1 wherein the received signal and the transmitted signal are in a code division multiple access format.

13. A user equipment comprising:

a power measurement device and a pathloss estimation device configured to determine a pathloss associated with a received signal;

an update device configured to receive an adjustment and adjust a value in response to the received adjustment;

a transmit power calculation device configured to determine a transmit power level based on multiplying the determined pathloss by a parameter and adding the adjusted value to a result of the multiplying;

wherein the parameter is value in the range of 0 to 1; and

an amplifier and an antenna configured to transmit a signal at the determined transmit power level.

14. The user equipment of claim 13 wherein the power measurement device measures a received power level of the received signal.

15. The user equipment of claim 13 wherein the power measurement device measures a received power level of a control channel.

16. The user equipment of claim 13 wherein the power measurement device measures a received power level of a broadcast control channel.

17. The user equipment of claim 13 wherein the transmit power calculation device is configured to determine the transmit power level based on the multiplying the determined pathloss by the parameter and adding the adjusted value to the result of the multiplication and at least one other value received by the user equipment from a base station.

18. The user equipment of claim 13 wherein the adjustment is a power control adjustment.

19. The user equipment of claim 18 wherein the adjustment is an outer loop power control adjustment.

20. The user equipment of claim 13 wherein the amplifier and antenna are configured to transmit the signal over at least one time slot of a radio frame divided into time slots.

21. The user equipment of claim 20 wherein the amplifier and antenna are configured to transmit a subsequent signal over a subsequent at least one time slot and a transmit power level of the subsequent signal is determined by multiplying an updated determined pathloss by the parameter and adding an updated adjusted value to a result of the multiplication of the updated determined pathloss.

22. The user equipment of claim 13 comprising an isolator configured to separate the received and transmitted signals.

23. The user equipment of claim 13 comprising a demodulator configured to demodulate signals received by the antenna to produce a baseband signal.

24. The user equipment of claim 13 wherein the received signal and the transmitted signal are in a code division multiple access format.

25. A method comprising:

determining a pathloss associated with a received signal by a user equipment (UE);

receiving an adjustment and adjusting a value in response to the received adjustment by the UE;

determining a transmit power level based on multiplying the determined pathloss by a parameter and adding the adjusted value to a result of the multiplying by the UE;

wherein the parameter is value in the range of 0 to 1; and

transmitting a signal at the determined transmit power level by the UE.

26. The method of claim 25 wherein the pathloss is derived by measuring a received power level of the received signal.

27. The method of claim 25 wherein the pathloss is derived by measuring a received power level of a control channel.

28. The method of claim 25 wherein the pathloss is derived by measuring a received power level of a broadcast control channel.

29. The method of claim 25 wherein the determined transmit power level is based on the multiplying the determined pathloss by the parameter and adding the adjusted value to the result of the multiplication and at least one other value received by the user equipment from a base station.

30. The method of claim 25 wherein the adjustment is a power control adjustment.

31. The method of claim 30 wherein the adjustment is an outer loop power control adjustment.

32. The method of claim 25 wherein the transmitting of the signal is over at least one time slot of a radio frame divided into time slots.

33. The method of claim 32 comprising transmitting a subsequent signal over a subsequent at least one time slot and a transmit power level of the subsequent signal is determined by multiplying an updated determined pathloss by the parameter and adding an updated adjusted value to a result of the multiplication of the updated determined pathloss.

34. The method of claim 25 comprising radiating the transmitted signal by an antenna of the UE.

35. The method of claim 25 comprising demodulating signals received by the antenna to produce a baseband signal.

36. The method of claim 25 wherein the received signal and the transmitted signal are in a code division multiple access format.