Maximum transmission power in white spaces

• US 9,144,031 B2
• Filed: 09/15/2011
• Issued: 09/22/2015
• Est. Priority Date: 09/15/2011
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Technologies Oy (Nokia Corporation)
• Inventors: Almeida, Erika Portela Lopes De, Chaves, Fabiano de Sousa, Vieira, Robson Domingos
• Primary Examiner(s): Rego, Dominic E
• Application Number:
  US14/344,053
• Publication Number:
  US 20140228065A1
• Time in Patent Office: 1,468 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: 1/1
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 52/241 taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
• CPC Class Codes: H04W 52/243 taking into account interferences
• CPC Class Codes: H04W 52/283 Power depending on the position of the mobile
• CPC Class Codes: H04W 52/343 taking into account loading or congestion level
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 72/0473 the resource being transmission power

Abstract

In accordance with the example embodiments of the invention there is at least a method, apparatus, and executable computer program to receive a location of a white space device, determine an original probability with which a primary receiver would operate correctly at the location, wherein the original probability is determined without taking interference due to the white space device into account, determine a maximum degradation to the original probability that the white space device may cause at the location, wherein the maximum degradation is based at least in part on an estimated signal quality of a primary system at the location, and determine a maximum transmission power for the white space device based on the maximum degradation.

Claims

1. A method comprising:

receiving a location of a white space device;

determining an original probability with which a primary receiver would operate correctly at the location, wherein the original probability is determined without taking interference due to the white space device into account;

determining a maximum degradation to the original probability that the white space device may cause at the location, wherein the maximum degradation is based at least in part on an estimated signal quality of a primary system at the location; and

determining a maximum transmission power for the white space device based on the maximum degradation.

2. The method according to claim 1, wherein the estimated signal quality is determined based at least partly on the original probability.

3. The method according to claim 1, wherein the maximum transmission power is a maximum equivalent isotropic radiated power.

4. The method according to claim 1, wherein the maximum degradation is based on an accuracy of the location of the white space device.

5. The method according to claim 1, wherein the determining the maximum degradation is based in part on an original location probability degradation value such that the maximum degradation level is higher when the original location probability degradation value is higher.

6. The method according to claim 1, wherein the maximum degradation is based on at least one of a determined and an estimated density of primary receivers within a determined neighborhood of the location.

7. The method according to claim 6, wherein the estimated density of primary receivers is based on a region classification of the location.

8. The method according to claim 7, wherein the region classification is one of urban, suburban, and rural.

9. A non-transitory computer readable medium encoded with a computer program executable by a processor to perform the following actions

receiving a location of a white space device;

determining an original probability with which a primary receiver would operate correctly at the location, wherein the original probability is determined without taking interference due to the white space device into account;

determining a maximum degradation to the original probability that the white space device may cause at the location, wherein the maximum degradation is based at least in part on an estimated signal quality of a primary system at the location; and

determining a maximum transmission power for the white space device based on the maximum degradation.

10. An apparatus comprising:

at least one processor; and

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

receive a location of a white space device;

determine an original probability with which a primary receiver would operate correctly at the location, wherein the original probability is determined without taking interference due to the white space device into account;

determine a maximum degradation to the original probability that the white space device may cause at the location, wherein the maximum degradation is based at least in part on an estimated signal quality of a primary system at the location; and

determine a maximum transmission power for the white space device based on the maximum degradation.

11. The apparatus according to claim 10, wherein the estimated signal quality is determined based at least partly on the original probability.

12. The apparatus according to claim 10, wherein the maximum transmission power is a maximum equivalent isotropic radiated power.

13. The apparatus according to claim 10, wherein the maximum degradation is based on an accuracy of the location of the white space device.

14. The apparatus according to claim 10, wherein the at least one memory including the computer code is configured, with the at least one processor, to cause the apparatus to determine the maximum degradation based in part on an original location probability degradation value such that the maximum degradation level is higher when the original location probability degradation value is higher.

15. The apparatus according to claim 10, wherein the maximum degradation is based on at least one of a determined and an estimated density of primary receivers within a determined neighborhood of the location.

16. The apparatus according to claim 15, wherein the estimated density of primary receivers is based on a region classification of the location.

17. The apparatus according to claim 16, wherein the region classification is one of urban, suburban, and rural.

18. An apparatus comprising:

means for receiving a location of a white space device;

means for determining an original probability with which a primary receiver would operate correctly at the location, wherein the original probability is determined without taking interference due to the white space device into account;

means for determining a maximum degradation to the original probability that the white space device may cause at the location, wherein the maximum degradation is based at least in part on an estimated signal quality of a primary system at the location; and

means for determining a maximum transmission power for the white space device, based on the maximum degradation.

19. The apparatus according to claim 18, wherein the means for receiving comprises an interface to a wireless communications network, and wherein the means for determining comprises computer program code, embodied on at least one non-transitory memory, executed by at least one processor.