INCUMBENT SPECTRUM HOLD DEVICE

• US 20090111463A1
• Filed: 10/31/2007
• Published: 04/30/2009
• Est. Priority Date: 10/31/2007
• Status: Active Grant

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Rao, Yadunandana N., Chaudhri, Apoorv, Simms, Matthew E.
• Granted Patent: US 8,014,345 B2
• Time in Patent Office: Days
• US Class Current: 455/424
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks

Abstract

A monitoring device (141) can include a transceiver (202) to receive a radio signal, and a controller (203) communicatively coupled to the transceiver to detect an infringement on the radio signal and report the infringement to a database. One or more policies within the database can be updated to mitigate the infringement. The monitoring device can also detect whether a cognitive radio (111) is generating interference on a primary spectrum used by an incumbent device (151). Other embodiments are disclosed.

Claims

1. A monitoring device, comprising

a transceiver to receive a radio signal;

and

a processor communicatively coupled to the transceiver to detect an interference on a primary spectrum of the radio signal, wherein the interference is caused by a cognitive radio (CR) in a vicinity of the monitoring device, and

report the interference as an infringement to a database.

2. The monitoring device of claim 1, wherein the processor by way of the transceiver logs the interference to a policy database accessible to a CR base station that manages cognitive devices in the vicinity, thereby notifying the CR base station of the infringement.

3. The monitoring device of claim 1, wherein the processor by way of the transceiver emits a beacon signal to report that an infringement has been detected on a frequency of the primary spectrum.

4. The monitoring device of claim 1, wherein the processor identifies a cognitive radio signature signal of a cognitive radio and addresses a beacon signal to that cognitive radio.

5. The monitoring device of claim 1, wherein at least one cognitive device accesses a policy database to determine if the at least one cognitive device is transmitting on a frequency in the vicinity and causing the interference.

6. The monitoring device of claim 3, wherein the beacon signal requests a hold on a channel of the radio signal and requests cognitive device causing the interference on the channel to suppress or cease transmission at a frequency causing the interference.

7. The monitoring device of claim 1, wherein the processor by way of the transceiver notifies an incumbent device holding the primary spectrum that a cognitive device in the vicinity is producing the interference on the primary spectrum.

8. The monitoring device of claim 1, wherein the processor scans a list of channels in the vicinity, measures the interference in the channels, and reports the interference to the database if the interference exceeds a threshold.

9. The monitoring device of claim 1, wherein the processor reports to the CR base station at least one communication channel experiencing interference.

10. The monitoring device of claim 1, wherein the processor reports to frequencies used in the vicinity, a duration and time of the interference on the frequencies, and interference levels on the frequencies.

11. The monitoring device of claim 1, further comprising a Global Positioning System (GPS) to identify a location of the monitoring device, wherein the processor by way of the transceiver

transmits the location to the CR base station, and

reports contour information related to the location.

12. A cognitive radio (CR) base station managing a plurality of cognitive devices, the CR base station comprising:

a transceiver; and

a processor communicatively coupled to the transceiver to receive an infringement from a CR monitoring device,

evaluate a transmit operation of the plurality of cognitive devices in view of the infringement based on access policies retrieved from a database; and

update the access polices to manage operation of the plurality of cognitive devices to mitigate the infringement.

13. The CR base station of claim 12, wherein the processor retrieves the infringement in response to the CR monitoring device logging the interference to the policy database.

14. The CR base station of claim 12, wherein the processor receives the infringement by way of a beacon signal transmitted by the CR monitoring device identifying the interference.

15. The CR base station of claim 12, wherein the infringement identifies at least one among a channel or frequency on which an interference was detected, a change in power spectrum levels, historical power spectrum levels, interference patterns, a time the interference was detected, a duration of the interference, and a location of the CR monitoring device.

16. The CR base station of claim 12, wherein the processor receives the infringement by way of a beacon signal transmitted by the CR monitoring device identifying the interference.

17. The CR base station of claim 12, wherein the processor recalculates a transmit power based on the infringement and updates the access policies to prevent transmission on the channel identified in the infringement

18. A Cognitive Radio (CR) having a processor that establishes a transmit operation based on access policies retrieved from a database, and that responsive to receiving an infringement from a CR monitoring device adjusts the operation to mitigate the infringement caused by the transmit operation.

19. The CR of claim 18, wherein the processor receives the infringement by way of a beacon signal transmitted by an incumbent device or by way of a base station directing the CR to cease operation in response to receiving the infringement via an update of the access policies in the database.