Spectrum Sharing

• US 20110201372A1
• Filed: 10/17/2008
• Published: 08/18/2011
• Est. Priority Date: 10/17/2008
• Status: Active Grant

• Current Assignee: Nokia Solutions and Networks US LLC (Nokia Corporation)
• Original Assignee: Nokia Solutions and Networks US LLC (Nokia Corporation)
• Inventors: Vihriala, Jaakko Eino Ilmari, Luo, Jijun
• Granted Patent: US 9,503,905 B2
• Time in Patent Office: Days
• US Class Current: 455/509
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 72/54 based on quality criteria

Abstract

The invention provides methods, a network device and radio station for spectrum resource allocation in a network employing spectrum sharing among at least a primary and secondary system, including scanning, by a network device of the secondary system, a specific frequency range of a candidate band of the primary system, estimating, by the network device, interference level on the scanned candidate band of the primary system, determining position of the network device, and transmitting the estimation result to a radio station of the secondary system.

Claims

1. Method for spectrum resource allocation in a network employing spectrum sharing among at least a primary and secondary system, comprising:

scanning, by a network device of the secondary system, a specific frequency range of a candidate band of the primary system,

estimating, by the network device, interference level on the scanned candidate band of the primary system,

determining position of the network device,

transmitting the estimation result to a radio station of the secondary system.

2. Method according to claim 1, wherein the estimating is performed frequency selective.

19. A computer program product including a program for a processing device, comprising software code portions for performing the steps of a method according to claim 1 when the program is run on the processing device.

3. Method, comprising:

receiving from at least one network device an estimation of interference level on a scanned frequency range of a candidate band of a primary system and position information of the network device, and

evaluating, based on the at least one estimation of the interference level and the position of the at least one network device, interference level in an entire cell area.

4. Method according to claim 3, further comprising, indicating the network device a suitable frequency for resource request according to the position of the network device.

5. Method according to claim 3, further comprising instructing network devices to scan complementary frequency bands if it is recognized that two or more network devices have similar position.

6. Method according to claim 3, further comprising combining estimation results of a plurality of network devices.

7. Method according to claim 3, further comprising instructing one of the network devices to stop scanning if it is recognized that two or more network devices have similar position.

8. Method according to claim 3, further comprising, when the interference level at a particular position and frequency is lower than a predetermined value, indicating to the network device that spectrum resources of the particular frequency of the primary system can be used at the particular position.

9. Method according to claim 3 implemented in a radio station such as a base station or node B.

10. Network device, comprising:

means for scanning a specific frequency range of a candidate band of the primary system,

means for estimating interference level on the scanned candidate band of the primary system,

means for determining position of the network device, means for transmitting the estimation result to a radio station of the secondary system.

11. Network device according to claim 10, wherein the estimating means is adapted to perform the estimation frequency selective.

12. Radio station, comprising:

means for receiving from at least one network device an estimation of interference level on a scanned candidate band of a primary system and position information of the network device, and

means for evaluating, based on the at least one estimation of the interference level and the position of the at least one network device, interference level in an entire cell area.

13. Radio station according to claim 12, further comprising means for indicating the network device a suitable frequency for resource request according to the position of the network device.

14. Radio station according to claim 12, further comprising means for instructing network devices to scan complementary frequency bands if it is recognized that two or more network devices have similar position.

15. Radio station according to claim 12, further comprising means for combining estimation results of a plurality of network devices.

16. Radio station according to claim 12, further comprising means for instructing one of the network devices to stop scanning if it is recognized that two or more network devices have similar position.

17. Radio station according to claim 12, further comprising, when the interference level at a particular position and frequency is lower than a predetermined value, means for indicating to the network device that spectrum resources of the particular frequency of the primary system can be used at the particular position.

18. Radio station according to claim 12, wherein the radio station is a base station, node B or the like.