METHOD AND APPARATUS FOR CONFIGURING TRAFFIC-TO-PILOT POWER RATIOS IN HETEROGENEOUS NETWORKS

• US 20130107823A1
• Filed: 10/26/2012
• Published: 05/02/2013
• Est. Priority Date: 10/28/2011
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Damnjanovic, Aleksandar, Damnjanovic, Jelena M., Wei, Yongbin
• Granted Patent: US 9,313,744 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04W 52/143 Downlink power control
• CPC Class Codes: H04W 52/16 Deriving transmission power values from another channel
• CPC Class Codes: H04W 52/243 taking into account interferences
• CPC Class Codes: H04W 52/244 Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
• CPC Class Codes: H04W 52/34 TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/542 using measured or perceived quality

Abstract

A method, an apparatus, and a computer program product for wireless communication are provided in connection with specifying a traffic-to-pilot (T/P) ratio per subframe and/or resource block to allow a base station to transmit over the subframes and/or resource blocks using varying transmit powers. In one example, a device communicating with the base station can receive a plurality of T/P ratios each related to a power used by the base station to transmit over one of a plurality of carriers in a specific subframe or resource block, determine a power of a reference signal received from the base station over a carrier of the plurality of carriers, and process a data signal received over the carrier within the specific subframe or resource block based in part on applying, to the power of the reference signal, a T/P ratio of the plurality of T/P ratios corresponding to the carrier.

Claims

1. A method for processing signals from a base station based on a traffic-to-pilot (T/P) ratio, comprising:

receiving a plurality of T/P ratios each related to a power used by a base station to transmit over one of a plurality of carriers in a specific subframe or resource block;

determining a power of a reference signal received from the base station over a carrier of the plurality of carriers; and

processing a data signal received over the carrier within the specific subframe or resource block based in part on applying, to the power of the reference signal, a T/P ratio of the plurality of T/P ratios corresponding to the carrier.

2. The method of claim 1, wherein the processing of the data signal further comprises using the power of the reference signal to demodulate the data signal or to report channel state information based on the data signal.

3. A method for processing signals from a base station based on a traffic-to-pilot (T/P) ratio, comprising:

receiving a reference signal from a base station and an interfering reference signal from an interfering base station over a specific subframe or resource block;

receiving a first T/P ratio utilized by the interfering base station to transmit over the specific subframe or resource block;

partially canceling an interfering data signal of the interfering base station from a data signal of the base station received in the specific subframe or resource block based in part on the first T/P ratio;

receiving a second T/P ratio related to a power used by the base station to transmit the data signal in the specific subframe or resource block;

determining a power of the reference signal received from the base station; and

processing the data signal following partially canceling the interfering data signal based in part on applying the second T/P ratio to the power of the reference signal.

4. The method of claim 3, wherein the processing of the data signal comprises using the power of the reference signal to demodulate the data signal or to report channel state information based on the data signal.

5. The method of claim 3, wherein the partially canceling of the interfering data signal is performed as part of demodulating the data signal.

6. A method of transmission using varying power in a subframe or resource block, comprising:

transmitting a reference signal over each of multiple carriers;

determining a transmit power for communicating data signals over each of the multiple carriers;

indicating a traffic-to-pilot (T/P) ratio for each of the multiple carriers to a device specifying the transmit power for the data signals as compared to a power of the reference signals over each of the multiple carriers; and

transmitting the data signals over each of the multiple carriers according to the transmit power.

7. The method of claim 6, further comprising receiving channel state information feedback related to each of the multiple carriers from the device.

8. A method of transmission using varying power in a subframe or resource block, comprising:

transmitting a reference signal;

negotiating a subframe or resource block with a base station as being protected resources for the base station;

determining a transmit power for communicating data signals over the protected resources for the base station;

indicating one or more traffic-to-pilot (T/P) ratios to a device for the transmit power in the protected resources as compared to a power of the reference signal; and

transmitting the data signals over the protected resources according to the transmit power.

9. The method of claim 8, wherein the negotiating further comprises negotiating the transmit power over the subframe or resource block.

10. The method of claim 8, further comprising:

receiving other T/P ratios from other base stations; and

communicating the other T/P ratios to the device for partially canceling an interfering reference signal from the other base stations.

11. The method of claim 8, wherein the transmitting of the reference signal comprises transmitting over at least one carrier of multiple carriers where carrier aggregation of the multiple carriers is provided for the device.

12. An apparatus for processing signals from a base station based on a traffic-to-pilot (T/P) ratio, comprising:

means for receiving a plurality of T/P ratios each related to a power used by a base station to transmit over one of a plurality of carriers in a specific subframe or resource block;

means for determining a power of a reference signal received from the base station over a carrier of the plurality of carriers; and

means for processing a data signal received over the carrier within the specific subframe or resource block based in part on applying, to the power of the reference signal, a T/P ratio of the plurality of T/P ratios corresponding to the carrier.

13. The apparatus of claim 12, wherein the means for processing of the data signal is further configured to use the power of the reference signal to demodulate the data signal, or to report channel state information based on the data signal.

14. An apparatus for processing signals from a base station based on a traffic-to-pilot (T/P) ratio, comprising:

means for receiving a reference signal from a base station and an interfering reference signal from an interfering base station over a specific subframe or resource block;

means for receiving a first T/P ratio utilized by the interfering base station to transmit over the specific subframe or resource block;

means for partially canceling an interfering data signal of the interfering base station from a data signal of the base station received in the specific subframe or resource block based in part on the first T/P ratio;

means for receiving a second T/P ratio related to a power used by the base station to transmit the data signal in the specific subframe or resource block;

means for determining a power of the reference signal received from the base station; and

means for processing the data signal following partially canceling the interfering data signal based in part on applying the second T/P ratio to the power of the reference signal.

15. The apparatus of claim 14, wherein the means for processing of the data signal is further configured to use the power of the reference signal to demodulate the data signal, or to report channel state information based on the data signal.

16. The apparatus of claim 14, wherein the partially canceling of the interfering data signal is performed as part of demodulating the data signal.

17. An apparatus for transmission using varying power in a subframe or resource block, comprising:

means for transmitting a reference signal over each of multiple carriers;

means for determining a transmit power for communicating data signals over each of the multiple carriers;

means for indicating a traffic-to-pilot (T/P) ratio for each of the multiple carriers to a device specifying the transmit power for the data signals as compared to a power of the reference signals over each of the multiple carriers; and

means for transmitting the data signals over each of the multiple carriers according to the transmit power.

18. The apparatus of claim 17, further comprising means for receiving channel state information feedback related to each of the multiple carriers from the device.

19. An apparatus for transmission using varying power in a subframe or resource block, comprising:

means for transmitting a reference signal;

means for negotiating a subframe or resource block with a base station as being protected resources for the base station;

means for determining a transmit power for communicating data signals over the protected resources for the base station;

means for indicating one or more traffic-to-pilot (T/P) ratios to a device for the transmit power in the protected resources as compared to a power of the reference signal; and

means for transmitting the data signals over the protected resources according to the transmit power.

20. The apparatus of claim 19, wherein the means for negotiating is further configured to negotiate the transmit power over the subframe or resource block.

21. The apparatus of claim 19, further comprising:

means for receiving other T/P ratios from other base stations; and

means for communicating the other T/P ratios to the device for partially canceling an interfering reference signal from the other base stations.

22. The apparatus of claim 19, wherein the means for transmitting of the reference signal is further configured to transmit over at least one carrier of multiple carriers where carrier aggregation of the multiple carriers is provided for the device.

23. An apparatus for wireless communication, comprising:

a processing system configured to;

receive a plurality of T/P ratios each related to a power used by a base station to transmit over one of a plurality of carriers in a specific subframe or resource block;

determine a power of a reference signal received from the base station over a carrier of the plurality of carriers; and

process a data signal received over the carrier within the specific subframe or resource block based in part on applying, to the power of the reference signal, a T/P ratio of the plurality of T/P ratios corresponding to the carrier.

24. The apparatus of claim 23, wherein the processing system is further configured to use the power of the reference signal to demodulate the data signal or to report channel state information based on the data signal.

25. An apparatus for wireless communication, comprising:

a processing system configured to;

receive a reference signal from a base station and an interfering reference signal from an interfering base station over a specific subframe or resource block;

receive a first T/P ratio utilized by the interfering base station to transmit over the specific subframe or resource block;

partially cancel an interfering data signal of the interfering base station from a data signal of the base station received in the specific subframe or resource block based in part on the first T/P ratio;

receive a second T/P ratio related to a power used by the base station to transmit the data signal in the specific subframe or resource block;

determine a power of the reference signal received from the base station; and

process the data signal following partially canceling the interfering data signal based in part on applying the second T/P ratio to the power of the reference signal.

26. The apparatus of claim 25, wherein the processing system is further configured to use the power of the reference signal to demodulate the data signal or to report channel state information based on the data signal.

27. The apparatus of claim 25, wherein the partially canceling of the interfering data signal is performed as part of demodulating the data signal.

28. An apparatus for wireless communication, comprising:

a processing system configured to;

transmit a reference signal over each of multiple carriers;

determine a transmit power for communicating data signals over each of the multiple carriers;

indicate a traffic-to-pilot (T/P) ratio for each of the multiple carriers to a device specifying the transmit power for the data signals as compared to a power of the reference signals over each of the multiple carriers; and

transmit the data signals over each of the multiple carriers according to the transmit power.

29. The apparatus of claim 28, wherein the processing system is further configured to receive channel state information feedback related to each of the multiple carriers from the device.

30. An apparatus for wireless communication, comprising:

a processing system configured to;

transmit a reference signal;

negotiate a subframe or resource block with a base station as being protected resources for the base station;

determine a transmit power for communicating data signals over the protected resources for the base station;

indicate one or more traffic-to-pilot (T/P) ratios to a device for the transmit power in the protected resources as compared to a power of the reference signal; and

transmit the data signals over the protected resources according to the transmit power.

31. The apparatus of claim 30, wherein the processing system is further configured to use negotiate the transmit power over the subframe or resource block.

32. The apparatus of claim 30, wherein the processing system is further configured to:

receive other T/P ratios from other base stations; and

communicate the other T/P ratios to the device for partially canceling an interfering reference signal from the other base stations.

33. The apparatus of claim 30, wherein the processing system is further configured to transmit over at least one carrier of multiple carriers where carrier aggregation of the multiple carriers is provided for the device.

34. A computer program product, comprising:

a computer-readable medium comprising code for;

receiving a plurality of T/P ratios each related to a power used by a base station to transmit over one of a plurality of carriers in a specific subframe or resource block;

determining a power of a reference signal received from the base station over a carrier of the plurality of carriers; and

processing a data signal received over the carrier within the specific subframe or resource block based in part on applying, to the power of the reference signal, a T/P ratio of the plurality of T/P ratios corresponding to the carrier.

35. The computer program product of claim 34, wherein the computer-readable medium further comprises code for using the power of the reference signal to demodulate the data signal or to report channel state information based on the data signal.

36. A computer program product, comprising:

a computer-readable medium comprising code for;

receiving a reference signal from a base station and an interfering reference signal from an interfering base station over a specific subframe or resource block;

receiving a first T/P ratio utilized by the interfering base station to transmit over the specific subframe or resource block;

partially canceling an interfering data signal of the interfering base station from a data signal of the base station received in the specific subframe or resource block based in part on the first T/P ratio;

receiving a second T/P ratio related to a power used by the base station to transmit the data signal in the specific subframe or resource block;

determining a power of the reference signal received from the base station; and

processing the data signal following partially canceling the interfering data signal based in part on applying the second T/P ratio to the power of the reference signal.

37. The computer program product of claim 36, wherein the computer-readable medium further comprises code for using the power of the reference signal to demodulate the data signal or to report channel state information based on the data signal.

38. The computer program product of claim 36, wherein the partially canceling of the interfering data signal is performed as part of demodulating the data signal.

39. A computer program product, comprising:

a computer-readable medium comprising code for;

transmitting a reference signal over each of multiple carriers;

determining a transmit power for communicating data signals over each of the multiple carriers;

indicating a traffic-to-pilot (T/P) ratio for each of the multiple carriers to a device specifying the transmit power for the data signals as compared to a power of the reference signals over each of the multiple carriers; and

transmitting the data signals over each of the multiple carriers according to the transmit power.

40. The computer program product of claim 39, wherein the computer-readable medium further comprises code for receiving channel state information feedback related to each of the multiple carriers from the device.

41. A computer program product, comprising:

a computer-readable medium comprising code for;

transmitting a reference signal;

negotiating a subframe or resource block with a base station as being protected resources for the base station;

determining a transmit power for communicating data signals over the protected resources for the base station;

indicating one or more traffic-to-pilot (T/P) ratios to a device for the transmit power in the protected resources as compared to a power of the reference signal; and

transmitting the data signals over the protected resources according to the transmit power.

42. The computer program product of claim 41, wherein the computer-readable medium further comprises code for negotiating the transmit power over the subframe or resource block.

43. The computer program product of claim 41, wherein the computer-readable medium further comprises code for:

receiving other T/P ratios from other base stations; and

communicating the other T/P ratios to the device for partially canceling an interfering reference signal from the other base stations.

44. The computer program product of claim 41, wherein the computer-readable medium further comprises code for transmitting over at least one carrier of multiple carriers where carrier aggregation of the multiple carriers is provided for the device.