METHOD AND APPARATUS FOR MANAGING UPLINK INTERFERENCE

• US 20130229990A1
• Filed: 10/13/2010
• Published: 09/05/2013
• Est. Priority Date: 03/12/2010
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Fan, Michael, Guo, Jiming, Chen, Bo
• Application Number:
  US13/578,585
• Publication Number:
  US 20130229990A1
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04W 72/52 based on load

Abstract

A method and apparatus for effectively managing uplink interference in a TD-SCDMA HSUPA system is provided. The method may comprise receiving a load indicator from each of one or more non-serving Node Bs, calculating a load factor for each of the one or more non-serving Node Bs, generating a weighted serving and neighbor Node B path loss (SNPL) metric by applying the calculated load factor to a non-weighted SNPL metric determination, and transmitting the generated weighted SNPL metric to a serving Node B.

Claims

1. A method of wireless communication in a time division synchronous code division multiple access (TD-SCDMA) system, comprising:

receiving a load indicator from each of one or more non-serving Node Bs;

calculating a load factor for each of the one or more non-serving Node Bs;

generating a weighted serving and neighbor Node B path loss (SNPL) metric by applying the calculated load factor to a non-weighted SNPL metric determination; and

transmitting the generated weighted SNPL metric to a serving Node B.

2. The method of claim 1, further comprising:

receiving a resource allocation from the serving Node B in response to the transmitted weighted SNPL metric.

3. The method of claim 2, wherein the resource allocation is assigned to minimize a UE interference to a region serviced by highly loaded non-serving Node B.

4. The method of claim 2, wherein the resource allocation is assigned to maximize a data rate to a UE located near a region serviced by a non-serving Node B which has a low load.

5. The method of claim 1, further comprising:

transmitting the calculated load factor using a request message.

6. The method of claim 1, wherein the load indicator is broadcast by each of the one or more non-serving Node Bs as a one bit element in each subframe.

7. The method of claim 6, wherein the one bit element is included in each subframe by applying a phase shift to a midamble shift assignment.

8. The method of claim 7, wherein the load indicator is indicated as on when the applied phase shift is opposite to a phase shift of a common control channel, and the load indicator is indicated as off when the applied phase shift is the same as the phase shift of the common control channel.

9. The method of claim 1, wherein the non-weighted SNPL metric is determined either by calculating a reciprocal of a harmonic sum of a ratio of a serving Node B path loss to each of the one or more non-serving Node B path losses, or by calculating a ratio of the serving Node B path loss to a minimum of the one or more non-serving Node B path losses.

10. The method of claim 1, wherein the wireless communication is performed in a time division high speed uplink packet access (TD-HSUPA) system.

11. An apparatus for wireless communication in a TD-SCDMA system, comprising:

means for receiving a load indicator from each of one or more non-serving Node Bs;

means for calculating a load factor for each of the one or more non-serving Node Bs;

means for generating a weighted SNPL metric by applying the calculated load factor to a non-weighted SNPL metric determination; and

means for transmitting the generated weighted SNPL metric to a serving Node B.

12. The apparatus of claim 11, wherein the means for receiving further comprises:

means for receiving a resource allocation from the serving Node B in response to the transmitted weighted SNPL metric.

13. The apparatus of claim 12, wherein the resource allocation is assigned to minimize a UE interference to a region serviced by highly loaded non-serving Node B.

14. The apparatus of claim 12, wherein the resource allocation is assigned to maximize a data rate to a UE located near a region serviced by a non-serving Node B which has a low load.

15. The apparatus of claim 12, wherein the means for transmitting further comprises:

means for transmitting the calculated load factor using a request message.

16. The apparatus of claim 11, wherein the load indicator is broadcast by each of the one or more non-serving Node Bs as a one bit element in each subframe.

17. The apparatus of claim 16, wherein the one bit element is included in each subframe by applying a phase shift to a midamble shift assignment.

18. The apparatus of claim 17, wherein the load indicator is indicated as on when the applied phase shift is opposite to a phase shift of a common control channel, and the load indicator is indicated as off when the applied phase shift is the same as the phase shift of the common control channel.

19. The apparatus of claim 11, wherein the non-weighted SNPL metric is determined either by calculating a reciprocal of a harmonic sum of a ratio of a serving Node B path loss to each of the one or more non-serving Node B path losses, or by calculating a ratio of the serving Node B path loss to a minimum of the one or more non-serving Node B path losses.

20. The apparatus of claim 11, wherein the wireless communication is performed in a TD-HSUPA system

21. A computer program product, comprising:

a computer-readable medium comprising code for;

receiving a load indicator from each of one or more non-serving Node Bs;

calculating a load factor for each of the one or more non-serving Node Bs;

generating a weighted SNPL metric by applying the calculated load factor to a non-weighted SNPL metric determination; and

transmitting the generated weighted SNPL metric to a serving Node B.

22. The computer program product of claim 21, wherein the computer-readable medium further comprises code for:

receiving a resource allocation from the serving Node B in response to the transmitted weighted SNPL metric.

23. The computer program product of claim 22, wherein the resource allocation is assigned to minimize a UE interference to a region serviced by highly loaded non-serving Node B.

24. The computer program product of claim 22, wherein the resource allocation is assigned to maximize a data rate to a UE located near a region serviced by a non-serving Node B which has a low load.

25. The computer program product of claim 21, wherein the computer-readable medium further comprises code for:

transmitting the calculated load factor using a request message.

26. The computer program product of claim 21, wherein the load indicator is broadcast by each of the one or more non-serving Node Bs as a one bit element in each subframe.

27. The computer program product of claim 26, wherein the one bit element is included in each subframe by applying a phase shift to a midamble shift assignment.

28. The computer program product of claim 27, wherein the load indicator is indicated as on when the applied phase shift is opposite to a phase shift of a common control channel, and the load indicator is indicated as off when the applied phase shift is the same as the phase shift of the common control channel.

29. The computer program product of claim 21, wherein the non-weighted SNPL metric is determined either by calculating a reciprocal of a harmonic sum of a ratio of a serving Node B path loss to each of the one or more non-serving Node B path losses, or by calculating a ratio of the serving Node B path loss to a minimum of the one or more non-serving Node B path losses.

30. The computer program product of claim 21, wherein the wireless communication is performed in a TD-HSUPA system

31. An apparatus for wireless communication in a TD-SCDMA system, comprising:

at least one processor; and

a memory coupled to the at least one processor,

a receiver configured to receive a load indicator from each of one or more non-serving Node Bs;

wherein the at least one processor is configured to;

calculate a load factor for each of the one or more non-serving Node Bs; and

generate a weighted SNPL metric by applying the calculated load factor to a non-weighted SNPL metric determination; and

a transmitter configured to transmit the generated weighted SNPL metric to a serving Node B.

32. The apparatus of claim 31, wherein the receiver is further configured to:

receive a resource allocation from the serving Node B in response to the transmitted weighted SNPL metric.

33. The apparatus of claim 32, wherein the resource allocation is assigned to minimize a UE interference to a region serviced by highly loaded non-serving Node B.

34. The apparatus of claim 32, wherein the resource allocation is assigned to maximize a data rate to a UE located near a region serviced by a non-serving Node B which has a low load.

35. The apparatus of claim 31, wherein the transmitter is further configured to:

transmit the calculated load factor using a request message.

36. The apparatus of claim 31, wherein the load indicator is broadcast by each of the one or more non-serving Node Bs as a one bit element in each subframe.

37. The apparatus of claim 36, wherein the one bit element is included in each subframe by applying a phase shift to a midamble shift assignment.

38. The apparatus of claim 37, wherein the load indicator is indicated as on when the applied phase shift is opposite to a phase shift of a common control channel, and the load indicator is indicated as off when the applied phase shift is the same as the phase shift of the common control channel.

39. The apparatus of claim 31, wherein the non-weighted SNPL metric is determined either by calculating a reciprocal of a harmonic sum of a ratio of a serving Node B path loss to each of the one or more non-serving Node B path losses, or by calculating a ratio of the serving Node B path loss to a minimum of the one or more non-serving Node B path losses.

40. The apparatus of claim 31, wherein the wireless communication is performed in a TD-HSUPA system.