Method and apparatus for detecting and identifying spectrum opportunities

• US 8,223,699 B2
• Filed: 03/30/2007
• Issued: 07/17/2012
• Est. Priority Date: 03/30/2007
• Status: Active Grant

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola Solutions, Inc.
• Inventors: Rao, Yadunandana N., Chaudhri, Apoorv, Corke, Robert J., Delve, Trefor J., Prysby, Daniel G., Ware, Christopher G., Zeleznik, Michael F.
• Primary Examiner(s): Afshar, Kamran
• Assistant Examiner(s): Obayanju, Omoniyi
• Application Number:
  US11/694,808
• Publication Number:
  US 20080240024A1
• Time in Patent Office: 1,936 Days
• Field of Search: 370/329, 370/330, 455/450
• US Class Current: 370/329
• CPC Class Codes: H04Q 2213/13098 Mobile subscriber
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information

Abstract

A method (20,200) and apparatus (10) for detecting and identifying spectrum opportunities, including the steps of communicating a location of at least one node (12) to at least one base station (14) (24), transmitting a list of at least one channel from the at least one base station (14) to the at least one node (12) (26), and sensing the at least one channel from the list by the at least one node (12) (34). The method (20,200) also includes the steps of determining if the at least one channel is in use, and if the at least one channel is in use, determining the user of the at least one channel that is in use (38).

Claims

1. A method of detecting and identifying spectrum opportunities, the method comprising the steps of:

communicating at least a location of at least one node to at least one base station;

transmitting a list of at least one channel from the at least one base station to the at least one node;

sensing the at least one channel from the list by the at least one node;

determining if the at least one channel is in use;

determining a user of each of the at least one channel that is in use; and

when the at least one base station determines the user of one of the at least one channel that is being used, the at least one base station determines if the user is one of a licensed primary user, a licensed secondary user, and an unlicensed user; and

if the user of the at least one channel is one of a secondary user and an unlicensed user, the node co-exists with the user in the at least one channel.

2. The method of claim 1 further comprising the step of determining soft information for the at least one channel by the at least one node, and transmitting the soft information from the at least one node to the at least one base station.

3. The method of claim 1 further comprising the step of the at least one base station assigning a signal indicator to each of the at least one channels, wherein the signal indicator is included in the transmission of the list of the at least one channel.

4. The method of claim 3 further comprising the step of the at least one node sorting the list of the at least one channel based upon the signal indicator.

5. The method of claim 1 further comprising the step of configuring at least one of the hardware or software of the at least one node for each of the at least one channel based upon the received list of the at least one channel.

6. The method of claim 1 further comprising the step of the at least one node using one of the at least one channel that is unused.

7. The method of claim 1 further comprising the step of the list of the at least one channel being based upon data the at least one base station received from a plurality of nodes of the at least one node and a history of data the at least one base station received from the plurality of nodes.

8. The method of claim 1 further comprising the step of a new node of the at least one node entering a network and in communication with the at least one base station, wherein the new node obtains the soft information from the at least one base station.

9. The method of claim 1 further comprising the step of communicating the velocity of the at least one node to the at least one base station.

10. A method of detecting and identifying spectrum opportunities, the method comprising the steps of:

providing a plurality of nodes in communication with at least one base station;

communicating a location and a velocity of each of the plurality of nodes to the at least one base station;

determining a list of a plurality of channels by the at least one base station wherein the list includes a signal indicator associated with each of the plurality of channels;

transmitting the list of the plurality of channels from the at least one base station to the plurality of nodes;

sorting the plurality of channels based upon the signal indicator by each of the plurality of nodes;

sensing the plurality of channels from the list by each of the plurality of nodes;

configuring at least one of the hardware and software of each of the plurality of nodes for each of the plurality of channels based upon the signal indicator;

determining soft information for the plurality of channels by the plurality of nodes;

transmitting the soft information from the plurality of nodes to the at least one base station;

determining if each of the plurality of channels are in use;

determining a user for each of the plurality of channels that are in use and

when the at least one base station determines the user of one of each of the plurality of channels that are being used, the at least one base station determines if the user is one of a licensed primary user, a licensed secondary user, and an unlicensed user; and

if the user of one of the plurality of channels is one of a secondary user and an unlicensed user, one of the plurality of nodes co-exists with the user on the channel or uses the channel over the user.

11. The method of claim 10 further comprising the step of a node of the plurality of nodes using one of the plurality of channels that is unused.

12. An apparatus of detecting and identifying spectrum opportunities comprising:

at least one base station having at least a microprocessor, a transmitter, and a receiver; and

at least one node in communication with the at least one base station having at least a sensing device, a transmitter, and a receiver, wherein the transmitter of the at least one base station transmits a list of at least one channel that is received by the receiver of the at least one node, and the sensing device of the at least one node senses each of the at least one channel in order to determine soft information of the channel and the transmitter of the at least one node transmits the soft information which is received by the receiver of the at least one base station and processed by the microprocessor of the at least one base station; and

wherein said at least one node transmits a signal over one of the at least one channel being used by a user, such that the at least one node co-exists with the user or transmits over the user.

13. The apparatus of claim 12, wherein the at least one node sorts the at least one channel based upon a signal indicator.

14. The apparatus of claim 12, wherein at least one of the hardware and software of the at least one node is reconfigured for each of the at least one channel.

15. A method of detecting and identifying spectrum opportunities, the method comprising the steps of:

communicating at least a location of at least one node to at least one base station;

transmitting a list of at least one channel from the at least one base station to the at least one node;

sensing the at least one channel from the list by the at least one node;

determining if the at least one channel is in use;

determining a user of each of the at least one channel that is in use; and

when the at least one base station determines the user of one of the at least one channel that is being used, the at least one base station determines if the user is one of a licensed primary user, a licensed secondary user, and an unlicensed user; and

if the user of the at least one channel is one of a secondary user and an unlicensed user, the node uses the at least one channel over the user.

16. A method of detecting and identifying spectrum opportunities, the method comprising the steps of:

broadcasting at least a location of at least one node to at least one base station;

transmitting a list of at least one channel from the at least one base station to the at least one node;

sensing the at least one channel from the list by the at least one node;

determining if the at least one channel is in use;

identifying a user of each of the at least one channel that is in use; and

determining if the user is one of a licensed primary user, a licensed secondary user, and an unlicensed user; and

when the identified user is a licensed secondary user and an unlicensed user, the node either performing one of;

co-existing with the user in the at least one channel; and

using the at least one channel over the user.