Method and apparatus for dynamic spectrum access
First Claim
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1. A method for facilitating communication between first and second communication devices, comprising the steps of:
- establishing a first communication link between the first and second communication devices through a first channel, the first channel being licensed to a primary user, and the first and second communication devices being unlicensed devices permitted to use the first channel when it is not in use by the primary user;
monitoring the first channel to determine whether the first channel is used by the primary user in establishing a communication link therethrough, said monitoring step including the steps of determining an in-band threshold dynamically based on a first set of parameters detected in the first channel and determining a channel quality of the first channel dynamically based on a second set of parameters detected in the first channel; and
establishing a second communication link between the first and second communication devices through a second channel if the channel quality of the first channel at a given time exceeds the threshold.
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Abstract
Methods and apparatus are provided for the efficient use of cognitive radios in the performance of dynamic spectrum access. This includes spectrum sensing algorithms, adaptive optimized sensing of parameters based on changing radio environments, and identifying vacant channels. Protocols for switching communication links to different channels, and synchronizing communicating nodes in order to maintain reliable connectively while maximizing spectrum usage are also provided.
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Citations
18 Claims
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1. A method for facilitating communication between first and second communication devices, comprising the steps of:
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establishing a first communication link between the first and second communication devices through a first channel, the first channel being licensed to a primary user, and the first and second communication devices being unlicensed devices permitted to use the first channel when it is not in use by the primary user; monitoring the first channel to determine whether the first channel is used by the primary user in establishing a communication link therethrough, said monitoring step including the steps of determining an in-band threshold dynamically based on a first set of parameters detected in the first channel and determining a channel quality of the first channel dynamically based on a second set of parameters detected in the first channel; and establishing a second communication link between the first and second communication devices through a second channel if the channel quality of the first channel at a given time exceeds the threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification