METHOD AND APPARATUS FOR COMMUNICATION BY A SECONDARY USER OF SPECTRUM
First Claim
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1. A method for communicating by a secondary communication device over spectrum utilized by a primary communication device, the method comprising the steps of:
- selecting a best route to utilize based on a function of intervening nodes'"'"' distance to a primary communication device or signal-strength measurements of the primary communication device; and
utilizing the best route to transmit data to the destination node.
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Abstract
A method and apparatus is provided for allowing communication of a secondary communication device over spectrum allocated to a primary user. During operation a node wishing to communicate will determine a route to a destination device that will cause a least amount of interference to a primary communication system. Communication will then take place only if the sum of all communications along the route will not cause interference to the primary communication system.
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Citations
19 Claims
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1. A method for communicating by a secondary communication device over spectrum utilized by a primary communication device, the method comprising the steps of:
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selecting a best route to utilize based on a function of intervening nodes'"'"' distance to a primary communication device or signal-strength measurements of the primary communication device; and utilizing the best route to transmit data to the destination node. - View Dependent Claims (2, 3, 4, 5)
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6. A method for communicating by a secondary communication device over spectrum utilized by a primary communication device, the method comprising the steps of:
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selecting at least one route to a destination node using a cost, wherein the cost of the route is a function of intervening nodes'"'"' signal-strength measurements of a primary communication device; and utilizing a route to the destination node having a least cost. - View Dependent Claims (7, 8, 9, 10)
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11. A method comprising the steps of:
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receiving a route reply (RREP) message, wherein the route reply message comprises a cost for a route, and wherein the cost for the route is a function of intervening nodes'"'"' signal-strength measurements of a primary spectrum user; determining a signal strength measurement of the primary spectrum user; modifying the cost of the route based on the signal strength measurement of the primary spectrum user; and forwarding the modified RREP message.
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12. An apparatus comprising:
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logic circuitry selecting at least one route to a destination node using a cost, wherein the cost of the route is a function of intervening nodes'"'"' signal-strength measurements of a primary communication device; and a transmitter utilizing a route to the destination node having a least cost. - View Dependent Claims (13, 14, 15, 16)
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17. An apparatus for communicating by a secondary communication device over spectrum utilized by a primary communication device, the apparatus comprising:
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logic circuitry selecting a best route to utilize based on a function of intervening nodes'"'"' distance to a primary communication device and/or signal-strength measurements of the primary communication device; and a transmitter utilizing the best route to transmit data to the destination node. - View Dependent Claims (18, 19)
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Specification