Adaptive A-MPR in inter-band carrier aggregation

• US 8,725,193 B2
• Filed: 11/03/2011
• Issued: 05/13/2014
• Est. Priority Date: 11/03/2011
• Status: Active Grant

• Current Assignee: Xiaomi H.K. Ltd. (Xiaomi Corp.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Henttonen, Tero M., Kaukovuori, Jouni K., Immonen, Antti O.
• Primary Examiner(s): Rego, Dominic E
• Application Number:
  US13/288,270
• Publication Number:
  US 20130115997A1
• Time in Patent Office: 922 Days
• Field of Search: 455/522, 455/67.11, 455 68- 70, 455/115.3, 455/126, 455/127.1, 455/127.2, 455/135, 455/226.3, 455/277.2, 455/296, 370/318
• US Class Current: 455/522
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• 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 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 52/40 during macro-diversity or soft handoff

Abstract

A method to prevent reception interference caused by inter-band CA is described. The method includes receiving instructions to concurrently operate on a first and second band. A first MPR is associated with the first band and a second MPR is associated with the second band. In response to determining that the concurrent operation on the first band and the second band would cause desensitization, a power adjustment is selected. The power adjustment includes a first A-MPR for the first band and/or a second A-MPR for the second band. In response to determining that the device can concurrently operate on the first band and the second band when the power adjustment is applied, the power adjustment is applied. Apparatus and computer readable media are also described.

Claims

1. A method comprising:

receiving instructions to concurrently operate on a first band and a second band, where a first maximum power reduction is associated with the first band and a second maximum power reduction is associated with the second band;

determining whether concurrent operation on the first band and the second band would cause desensitization in at least one receiver band;

in response to determining that the concurrent operation on the first band and the second band would cause desensitization, selecting a power adjustment, where the power adjustment comprises at least one of;

a first additional maximum power reduction for the first band and a second additional maximum power reduction for the second band;

determining whether a device can concurrently operate on the first band and the second band when the power adjustment is applied; and

in response to determining that the device can concurrently operate on the first band and the second band when the power adjustment is applied, applying the power adjustment.

2. The method of claim 1, further comprising in response to determining that the device cannot concurrently operate on the first band and the second band when the power adjustment is applied, performing at least one of:

switching the device to a one uplink and two downlink mode,

decreasing the output power of one of the first band and the second band to a minimum output power level and

informing a network element that the device cannot concurrently operate on the first band and the second band.

3. The method of claim 1, where selecting the power adjustment comprises selecting a power adjustment based at least in part on the first band and the second band.

4. The method of claim 1, where applying the power adjustment comprises at least one of:

adding the first additional maximum power reduction on top of the first maximum power reduction of the first band and

adding the second additional maximum power reduction on top of the second maximum power reduction of the second band.

5. The method of claim 1, where determining whether the device can concurrently operate on the first band and the second band when the power adjustment is applied comprises determining whether applying the power adjustment would cause the device to be outside a coverage area for at least one of:

the first band and the second band.

6. The method of claim 1, where determining whether concurrent operation on the first band and the second band would cause desensitization comprises determining whether transmission on one of the first band and the second band creates a harmonic interference for reception on at least one of the first band and the second band.

7. The method of claim 1, where determining whether concurrent operation on the first band and the second band would cause desensitization comprises determining whether transmission on both the first band and the second band creates an inter-modulation interference for reception on at least one of the first band and the second band.

8. An apparatus, comprising at least one processor;

and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to perform at least the following;

to receive instructions to concurrently operate on a first band and a second band, where a first maximum power reduction is associated with the first band and a second maximum power reduction is associated with the second band;

to determine whether concurrent operation on the first band and the second band would cause desensitization in at least one receiver band;

in response to determining that the concurrent operation on the first band and the second band would cause desensitization, to select a power adjustment, where the power adjustment comprises at least one of;

a first additional maximum power reduction for the first band and a second additional maximum power reduction for the second band;

to determine whether a device can concurrently operate on the first band and the second band when the power adjustment is applied; and

in response to determining that the device can concurrently operate on the first band and the second band when the power adjustment is applied, to apply the power adjustment.

9. The apparatus of claim 8, where the at least one memory and the computer program code are further configured to cause the apparatus, in response to determining that the device cannot concurrently operate on the first band and the second band when the power adjustment is applied, to perform at least one of:

switching the device to a one uplink and two downlink mode,

decreasing the output power of one of the first band and the second band to a minimum output power level and

informing a network element that the device cannot concurrently operate on the first band and the second band.

10. The apparatus of claim 8, where selecting the power adjustment comprises selecting a power adjustment based at least in part on the first band and the second band.

11. The apparatus of claim 8, where applying the power adjustment comprises at least one of:

adding the first additional maximum power reduction on top of the first maximum power reduction of the first band and

adding the second additional maximum power reduction on top of the second maximum power reduction of the second band.

12. The apparatus of claim 8, where determining whether the device can concurrently operate on the first band and the second band when the power adjustment is applied comprises determining whether applying the power adjustment would cause the device to be outside a coverage area for at least one of:

the first band and the second band.

13. The apparatus of claim 8, where determining whether concurrent operation on the first band and the second band would cause desensitization comprises determining whether transmission on one of the first band and the second band creates one of:

a harmonic interference and an inter-modulation interference for reception on at least one of one of the first band and the second band for reception.

14. A computer readable medium tangibly encoded with a computer program executable by a processor to perform actions comprising:

receiving instructions to concurrently operate on a first band and a second band, where a first maximum power reduction is associated with the first band and a second maximum power reduction is associated with the second band;

determining whether concurrent operation on the first band and the second band would cause desensitization in at least one receiver band;

in response to determining that the concurrent operation on the first band and the second band would cause desensitization, selecting a power adjustment, where the power adjustment comprises at least one of;

a first additional maximum power reduction for the first band and a second additional maximum power reduction for the second band;

determining whether a device can concurrently operate on the first band and the second band when the power adjustment is applied; and

in response to determining that the device can concurrently operate on the first band and the second band when the power adjustment is applied, applying the power adjustment.

15. The computer readable medium of claim 14, where the actions further comprise in response to determining that the device cannot concurrently operate on the first band and the second band when the power adjustment is applied, performing at least one of:

switching the device to a one uplink and two downlink mode,

decreasing the output power of one of the first band and the second band to a minimum output power level and

informing a network element that the device cannot concurrently operate on the first band and the second band.

16. The computer readable medium of claim 14, where selecting the power adjustment comprises selecting a power adjustment based at least in part on the first band and the second band.

17. An apparatus comprising:

means for receiving instructions to concurrently operate on a first band and a second band, where a first maximum power reduction is associated with the first band and a second maximum power reduction is associated with the second band;

first means for determining whether concurrent operation on the first band and the second band would cause desensitization in at least one receiver band;

means for selecting a power adjustment in response to determining that the concurrent operation on the first band and the second band would cause desensitization, where the power adjustment comprises at least one of;

a first additional maximum power reduction for the first band and a second additional maximum power reduction for the second band;

second means for determining whether a device can concurrently operate on the first band and the second band when the power adjustment is applied; and

means for applying the power adjustment in response to determining that the device can concurrently operate on the first band and the second band when the power adjustment is applied.

18. The apparatus of claim 17, further comprising means for performing, in response to determining that the device cannot concurrently operate on the first band and the second band when the power adjustment is applied, at least one of:

switching the apparatus to a one uplink and two downlink mode,

decreasing the output power of one of the first band and the second band to a minimum output power level and

informing a network element that the device cannot concurrently operate on the first band and the second band.

19. The apparatus of claim 17, where the selecting means comprises means for selecting a power adjustment based at least in part on the first band and the second band.

20. The apparatus of claim 17, where the second determining means comprises means for determining whether applying the power adjustment would cause the device to be outside a coverage area for at least one of:

the first band and the second band.