Method and apparatus for use of simultaneous multiple channels in the dynamic frequency selection band in wireless networks
First Claim
1. A device, comprising:
- a radar detector that performs a first scan for radar in respective 5 GHz radio channels of a plurality of 5 GHz radio channels; and
a 5 GHz radio transceiver that occupies one or more available 5 GHz radio channels of the plurality of 5 GHz radio channels on which radar was not detected by the radar detector by indicating to a client device that data transmission is available on the one or more available 5 GHz radio channels, wherein the 5 GHz radio transceiver occupies the one or more available 5 GHz radio channels during a transmission duty cycle and a radar detection duty cycle,wherein the transmission duty cycle is a time period during which a specific 5 GHz radio channel of the one or more available 5 GHz radio channels is unoccupied, which is less than or equal to a maximum time period allowable for the client device to remain associated with the specific 5 GHz channel,and wherein the radar detection duty cycle is the time period between successive radar scans, by the radar detector, on the specific 5 GHz channel.
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Abstract
The present invention relates to wireless networks and more specifically to systems and methods for selecting available channels free of radar signals from a plurality of 5 GHz radio frequency channels. In one embodiment, the present invention provides a standalone multi-channel DFS master that includes a switch and embedded processor that are programmed to switch a 5 GHz radio transceiver to a first channel of the plurality of 5 GHz radio channels, cause a beacon generator to generate a beacon in the first channel of the plurality of 5 GHz radio channels, cause a radar detector to scan for the radar signal in the first channel of the plurality of 5 GHz radio channel, and then repeat these steps for each of the other channels of the plurality of 5 GHz radio channels during a single beacon transmission duty cycle.
117 Citations
20 Claims
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1. A device, comprising:
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a radar detector that performs a first scan for radar in respective 5 GHz radio channels of a plurality of 5 GHz radio channels; and a 5 GHz radio transceiver that occupies one or more available 5 GHz radio channels of the plurality of 5 GHz radio channels on which radar was not detected by the radar detector by indicating to a client device that data transmission is available on the one or more available 5 GHz radio channels, wherein the 5 GHz radio transceiver occupies the one or more available 5 GHz radio channels during a transmission duty cycle and a radar detection duty cycle, wherein the transmission duty cycle is a time period during which a specific 5 GHz radio channel of the one or more available 5 GHz radio channels is unoccupied, which is less than or equal to a maximum time period allowable for the client device to remain associated with the specific 5 GHz channel, and wherein the radar detection duty cycle is the time period between successive radar scans, by the radar detector, on the specific 5 GHz channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising;
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scanning a plurality of 5 GHz radio channels for radar; determining one or more 5 GHz radio channels of the plurality of 5 GHz radio channels are available based on radar not being detected during the scanning; and occupying the one or more 5 GHz radio channels during a transmission duty cycle and a radar detection duty cycle by indicating to a client device that data transmission is available on the one or more available 5 GHz radio channels, wherein the transmission duty cycle is a time period during which a specific 5 GHz radio channel of the one or more available 5 GHz radio channels is unoccupied, which is less than or equal to a maximum time period allowable for the client device to remain associated with the specific 5 GHz channel, and wherein the radar detection duty cycle is the time period between successive radar scans on the specific 5 GHz channel. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A standalone multi-channel dynamic frequency selection master, comprising:
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a radar detector that performs a first scan for radar in respective 5 GHz radio channels of a plurality of 5 GHz radio channels; and a 5 GHz radio transceiver that occupies a first 5 GHz radio channel of the plurality of 5 GHz radio channels on which radar was not detected by the radar detector, wherein the 5 GHz radio transceiver occupies the first 5 GHz radio channel during a transmission duty cycle and a radar detection duty cycle by indicating to a client device that data transmission is available on the one or more available 5 GHz radio channels, wherein the transmission duty cycle is a time period during which the first 5 GHz radio channel is unoccupied, which is less than or equal to a maximum time period allowable for the client device to remain associated with the first 5 GHz channel, and wherein the radar detection duty cycle is the time period between successive radar scans on the first 5 GHz channel by the radar detector. - View Dependent Claims (17, 18, 19, 20)
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Specification