Method and apparatus for dynamic spectrum access
AssigneeThe Trustees of the Stevens Institute of Technology
InventorsRajarathnam Chandramouli, Shamik Sengupta, Kai Hong
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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.
Claims13
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 data channel;
- monitoring a plurality of second channels to determine whether they are used by incumbent users;
- sending a management frame from the first communication device to the second communication device through the first data channel, the management frame including a list of the second channels, the list indicating a set of the second channels available for switching communication thereto;
- establishing a second communication link between the first and second communication devices through one of the set of the second channels.
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;
- initiating a channel switching operation upon detecting a channel switching event associated with the first channel, said initiating step including the step of directing data transmitted from an upper layer of a communication protocol of the first communication device to a buffer for storage therein;
- completing the channel switching operation by establishing a second communication link between the first and second communication devices through a second channel;
- and
- transmitting the data stored in the buffer to the second communication device upon completing the completing step.
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;
- determining an in-band threshold dynamically based on a first set of parameters detected in the first channel;
- 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.
Dependencies are inferred from the claim text.