Extension of power headroom reporting and trigger conditions

• US 20090245191A1
• Filed: 03/26/2009
• Published: 10/01/2009
• Est. Priority Date: 03/26/2008
• Status: Active Grant

• Current Assignee: Vivo Mobile Communication Co., Ltd. (Vivo Communication Technology Co. Ltd.)
• Original Assignee: Nokia Solutions and Networks US LLC (Nokia Corporation)
• Inventors: Ball, Carsten, Rosa, Claudio, Mullner, Robert, Lindholm, Jari
• Granted Patent: US 8,570,957 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04W 52/365 Power headroom reporting
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 8/24 Transfer of terminal data

Abstract

A method can include determining a power headroom report, and transmitting the headroom report. The power headroom report can provide both positive and negative values of power headroom according to the determination, in which negative values indicate the missing power in dB to fulfill requirements, such as those given by current resource allocation and modulation and coding scheme. This method can be implemented by encoding instructions for performing this method on a computer-readable medium, such that the instructions when execute cause the computer to execute the method as a computer process. The method can further include receiving a power headroom report. The method can additionally include allocating radio network resources based on the power headroom report.

Claims

1. An apparatus, comprising:

a processor configured to determine a power headroom report; and

a transmitter configured to transmit the headroom report,

wherein the processor is configured to determine the power headroom report with both positive and negative values of power headroom, as applicable, in which negative values indicate the missing power in dB to fulfill transmission requirements.

2. The apparatus of claim 1, wherein the processor is configured to determine the power headroom by subtracting the nominal maximum transmission power and the power that the apparatus would use if it did not apply maximum power limitations, wherein the result of said subtracting is not limited to zero and positive values.

3. The apparatus of claim 1, wherein the apparatus comprises a user equipment.

4. The apparatus of claim 1, wherein the processor is configured to determine the power headroom report comprising a 6 bit report configured to identify a level selected from a range of +40 to −

23 dB, in 1 dB steps.

5. An apparatus, comprising:

a receiver configured to receive a power headroom report;

a processor configured to allocate radio network resources based on the power headroom report,

wherein processor is configured to obtain both positive and negative values of power headroom from the power headroom report, as applicable, in which negative values indicate the missing power in dB to fulfill transmission requirements.

6. The apparatus of claim 5, wherein the processor is configured to allocate additional radio network resources to a user equipment when the power headroom indicates positive headroom, when applicable, and to allocate fewer radio network resources to the user equipment when the power headroom report indicates negative headroom.

7. The apparatus of claim 5, wherein the apparatus comprises an enhanced node B.

8. The apparatus of claim 5, wherein the processor is configured to obtain, from the power headroom report, a 6 bit report configured to identify a level selected from a range of +40 to −

23 dB, in 1 dB steps.

9. A method, comprising:

determining a power headroom report; and

transmitting the headroom report,

wherein the determining comprises determining the power headroom report with both positive and negative values of power headroom, as applicable, in which negative values indicate the missing power in dB to fulfill transmission requirements.

10. The method of claim 9, wherein the determining comprises determining the power headroom by subtracting the nominal maximum transmission power and the power that the apparatus would use if it did not apply maximum power limitations, wherein the result of said subtracting is not limited to zero and positive values.

11. The method of claim 9, wherein the method is performed by a user equipment.

12. The method of claim 9, further comprising:

configuring the power headroom report as a 6 bit report configured to identify a level selected from a range of +40 to −

23 dB, in 1 dB steps.

13. A method, comprising:

receiving a power headroom report;

allocating radio network resources based on the power headroom report,

wherein the allocating comprises obtaining, from the power headroom report, both positive and negative values of power headroom, as applicable, in which negative values indicate the missing power in dB to fulfill transmission requirements.

14. The method of claim 13, wherein the allocating radio resources comprises allocating additional radio network resources to a user equipment when the power headroom indicates positive headroom, when applicable, and to allocate fewer radio network resources to the user equipment when the power headroom report indicates negative headroom.

15. The method of claim 13, wherein the method is performed by an enhanced node B.

16. The method of claim 13, further comprising:

obtaining, from the power headroom report, a 6 bit report configured to identify a level selected from a range of +40 to −

23 dB, in 1 dB steps.

17. A computer-readable storage medium encoded with instructions configured to control a computer to execute a process, the process including:

determining a power headroom report; and

transmitting the headroom report,

wherein the determining comprises determining the power headroom report with both positive and negative values of power headroom, as applicable, in which negative values indicate the missing power in dB to fulfill transmission requirements.

18. A computer-readable storage medium encoded with instructions configured to control a computer to execute a process, the process including:

receiving a power headroom report;

allocating radio network resources based on the power headroom report,

wherein the allocating comprises obtaining, from the power headroom report, both positive and negative values of power headroom, as applicable, in which negative values indicate the missing power in dB to fulfill transmission requirements.

19. An apparatus, comprising:

determining means for determining a power headroom report; and

transmitting means for transmitting the headroom report,

wherein the determining means is configured to determine the power headroom report with both positive and negative values of power headroom, as applicable, in which negative values indicate the missing power in dB to fulfill transmission requirements.

20. An apparatus, comprising:

receiving means for receiving a power headroom report;

allocating means for allocating radio network resources based on the power headroom report,

wherein the allocating means is configured to obtain both positive and negative values of power headroom from the power headroom report, as applicable, in which negative values indicate the missing power in dB to fulfill transmission requirements.