GENERALIZED DIVISION FREE DUPLEXING TECHNIQUES FOR DECREASING RENDEVOUS TIME
First Claim
1. A method of managing a communication between devices in a network, the method comprising:
- analyzing spectral use using cognitive radio protocols to determine available spectra;
continuously receiving over a band of frequencies; and
transmitting a beacon signal over a beacon frequency within the band of frequencies while receiving over the band of frequencies.
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Accused Products
Abstract
Provided are methods and systems of using division-free duplexing (DFD) to reduce rendezvous time between two or more cognitive radio devices. The cognitive radio devices may opportunistically use available frequency spectra by communicating over available channels. To communicate, a first device may rendezvous with a second device by transmitting a beaconing signal over a frequency on which the second device is listening. DFD techniques may enable each of the devices to listen to a channel while concurrently transmitting beacon signals over the same channel. As periods of listening and periods of transmitting over the same channel need not be separated due to the transmitter cancelling approach used in DFD techniques, rendezvous time may be significantly reduced. Further, embodiments include a generalized DFD (GDFD) approach wherein devices listen to a broad band of frequencies, thus further reducing rendezvous time.
24 Citations
24 Claims
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1. A method of managing a communication between devices in a network, the method comprising:
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analyzing spectral use using cognitive radio protocols to determine available spectra; continuously receiving over a band of frequencies; and transmitting a beacon signal over a beacon frequency within the band of frequencies while receiving over the band of frequencies. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A communication system, comprising:
a plurality of communication devices, each configured to; analyze spectral use of a radio frequency spectrum; select one or more frequencies for communication based on the analysis of the spectral use; and use division free duplexing (DFD) to concurrently receive incoming transmissions from others of the plurality of communication devices in the system and transmit an outgoing beacon signal over the selected one or more frequencies. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 22, 23, 24)
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21. A method, comprising:
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identifying available channels for communication using cognitive radio techniques; listening to a frequency spectrum for an incoming beacon; transmitting an outgoing beacon based on the identified available channels while listening to the frequency spectrum; and cancelling interferences between the incoming beacon and the outgoing beacon using a division-free duplexing (DFD) technique.
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Specification