Dynamic frequency selection with recovery for a basic service set network
First Claim
1. A portion of a wireless communications system comprising:
- a station wirelessly transmitting a management frame including a dynamic frequency selection element defining a dynamic frequency selection owner, a dynamic frequency selection interval specifying a maximum period that a channel will be employed by stations within the wireless communications system, a dynamic frequency selection count specifying a time remaining until dynamic selection of a next channel is initiated, and a dynamic frequency selection recovery interval specifying a time after an end of the dynamic frequency selection interval when recovery procedures are initiated if no channel switch information is received during the dynamic frequency selection interval, wherein each station within the wireless communications system receiving the management frame includes the dynamic frequency selection element in subsequent management frames transmitted by the respective station during the dynamic frequency selection interval, and switches to the next channel at the announced channel switch instant.
1 Assignment
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Accused Products
Abstract
Dynamic frequency selection for an IEEE 802.11 basic service set network is enabled by a dynamic frequency selection (DFS) element within beacon and probe response frames defining a DFS owner, a DFS interval specifying the time until channel switch in beacon intervals, a DFS count specifying a time in beacon intervals until the DFS owner initiates selection of the next channel frequency from the supported channel set, and a DFS recovery interval specifying a time after the end of the DFS interval when recovery procedures are initiated if no channel switch information was received during that DFS interval. Channel switch information is presented in beacons following the end of the channel selection process, and within beacons during the DFS recovery interval.
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Citations
44 Claims
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1. A portion of a wireless communications system comprising:
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a station wirelessly transmitting a management frame including a dynamic frequency selection element defining a dynamic frequency selection owner, a dynamic frequency selection interval specifying a maximum period that a channel will be employed by stations within the wireless communications system, a dynamic frequency selection count specifying a time remaining until dynamic selection of a next channel is initiated, and a dynamic frequency selection recovery interval specifying a time after an end of the dynamic frequency selection interval when recovery procedures are initiated if no channel switch information is received during the dynamic frequency selection interval, wherein each station within the wireless communications system receiving the management frame includes the dynamic frequency selection element in subsequent management frames transmitted by the respective station during the dynamic frequency selection interval, and switches to the next channel at the announced channel switch instant. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A wireless communications system comprising:
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a plurality of stations, at least one station within the plurality of stations wirelessly transmitting a management frame including a dynamic frequency selection element defining a dynamic frequency selection owner, a dynamic frequency selection interval specifying a maximum period that a channel will be employed by stations within the wireless communications system, a dynamic frequency selection count specifying a time remaining until dynamic selection of a next channel is initiated, and a dynamic frequency selection recovery interval specifying a time after an end of the dynamic frequency selection interval when recovery procedures are initiated if no channel switch information is received during the dynamic frequency selection interval, wherein each remaining station within the plurality of stations includes the dynamic frequency selection element in subsequent management frames transmitted by the respective station during the dynamic frequency selection interval, and switches to the next channel at the announced channel switch instant. - View Dependent Claims (9, 10, 11, 12, 14, 15, 16, 17, 18, 19)
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13. A method of wireless communications comprising:
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wirelessly transmitting a management frame from at least one station within a plurality of stations forming a wireless communications system, the management frame including a dynamic frequency selection element defining a dynamic frequency selection owner, a dynamic frequency selection interval specifying a maximum period that a channel will be employed by stations within the wireless communications system, a dynamic frequency selection count specifying a time remaining until dynamic selection of a next channel is initiated, and a dynamic frequency selection recovery interval specifying a time after an end of the dynamic frequency selection interval when recovery procedures are initiated if no channel switch information is received during the dynamic frequency selection interval;
including the dynamic frequency selection element in subsequent management frames transmitted by other stations within the plurality of stations during the dynamic frequency selection interval; and
switching the plurality of stations to the next channel at the announced channel switch time.
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20. A wireless communications message comprising:
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a dynamic frequency selection element defining a dynamic frequency selection owner, a dynamic frequency selection interval specifying a maximum period that a channel will be employed by stations within the wireless communications system, a dynamic frequency selection count specifying a time remaining until dynamic selection of a next channel is initiated, and a dynamic frequency selection recovery interval specifying a time after an end of the dynamic frequency selection interval when recovery procedures are initiated if no channel switch information is received during the dynamic frequency selection interval, wherein the dynamic frequency selection element is included within management frames transmitted by stations in a wireless communications system during the dynamic frequency selection interval. - View Dependent Claims (21, 22, 23, 24, 26, 27, 28, 29)
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25. A portion of a wireless communications system comprising:
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a station wirelessly transmitting a management frame including a dynamic frequency selection element defining a dynamic frequency selection owner, a dynamic frequency selection interval specifying a maximum period that a channel will be employed by stations within the wireless communications system, and a dynamic frequency selection count specifying a time remaining until dynamic selection of a next channel is initiated, wherein each station within the wireless communications system receiving the management frame includes the dynamic frequency selection element in subsequent management frames transmitted by the respective station during the dynamic frequency selection interval, and switches to the next channel at an announced channel switch instant.
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30. A wireless communications system comprising:
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a plurality of stations, at least one station within the plurality of stations wirelessly transmitting a management frame including a dynamic frequency selection element defining a dynamic frequency selection owner, a dynamic frequency selection interval specifying a maximum period that a channel will be employed by stations within the wireless communications system, and a dynamic frequency selection count specifying a time remaining until dynamic selection of a next channel is initiated, wherein each remaining station within the plurality of stations includes the dynamic frequency selection element in subsequent management frames transmitted by the respective station during the dynamic frequency selection interval, and switches to the next channel at an announced channel switch time. - View Dependent Claims (31, 32, 33, 34, 36, 37, 38, 39)
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35. A method of wireless communications comprising:
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wirelessly transmitting a management frame from at least one station within a plurality of stations forming a wireless communications system, the management frame including a dynamic frequency selection element defining a dynamic frequency selection owner, a dynamic frequency selection interval specifying a maximum period that a channel will be employed by stations within the wireless communications system, and a dynamic frequency selection count specifying a time remaining until dynamic selection of a next channel is initiated;
including the dynamic frequency selection element in subsequent management frames transmitted by other stations within the plurality of stations during the dynamic frequency selection interval; and
switching the plurality of stations to the next channel at an announced channel switch time.
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40. A wireless communications message comprising:
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a dynamic frequency selection element defining a dynamic frequency selection owner, a dynamic frequency selection interval specifying a maximum period that a channel will be employed by stations within the wireless communications system, and a dynamic frequency selection count specifying a time remaining until dynamic selection of a next channel is initiated, wherein the dynamic frequency selection element is included within management frames transmitted by stations in a wireless communications system during the dynamic frequency selection interval. - View Dependent Claims (41, 42, 43, 44)
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Specification