Communication methods and apparatus which may be used in the absence or presence of beacon signals
First Claim
1. A method of operating a mobile wireless communications device, comprising:
- monitoring during a first period of time to detect at least a portion of a first beacon signal including at least one beacon symbol in a first communications band; and
when a beacon signal portion including at least one beacon symbol is not detected during said first period of time, transmitting a first signal over the air during a second period of time following said first period of time, said first signal beinga second beacon signal communicating a session priority level of a communications session in which said wireless communications device is a participant.
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0 Petitions
Accused Products
Abstract
Wireless devices, e.g., in a cognitive radio network, discover and use locally available usable spectrum for communication. Beacon signaling facilitates available spectrum discovery, spectrum usage coordination, and device identification. A wireless terminal, which may have entered a new area and powered up, monitors to detect for the presence of beacon signals in a communications band. When the wireless terminal fails to detect a beacon, the wireless terminal assumes that the spectrum is available and transmits its user beacon signal thereby providing notification of its presence in the area to other wireless terminals. The wireless terminal maintains a coordinated timing relationship between its beacon transmit interval and beacon detect interval, which are performed on an ongoing basis. The combination of beacon TX interval and beacon monitoring interval represents a small fraction of total time, allowing for power conservation. The coordinated timing relationship, known to peers, facilitates efficient peer-peer communications session establishment.
330 Citations
43 Claims
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1. A method of operating a mobile wireless communications device, comprising:
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monitoring during a first period of time to detect at least a portion of a first beacon signal including at least one beacon symbol in a first communications band; and when a beacon signal portion including at least one beacon symbol is not detected during said first period of time, transmitting a first signal over the air during a second period of time following said first period of time, said first signal being a second beacon signal communicating a session priority level of a communications session in which said wireless communications device is a participant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A mobile wireless communications device, comprising:
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a beacon detection module for detecting receipt of at least one beacon symbol communicated in a first communications band; a transmitter; and a transmission control module for controlling signal transmission as a function of an output of said beacon detection module, said transmission control module controlling said transmitter to transmit a first signal over the air during a second period of time following a first period of time when a beacon signal portion including at least one beacon symbol is not detected during said first period of time, said first signal being a second beacon signal communicating a session priority level of a communications session in which said wireless communications device is a participant. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A mobile wireless communications device, comprising:
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means for detecting beacon signals for detecting receipt of at least one beacon symbol communicated in a first communications band; means for transmitting over the air; and means for controlling said means for transmitting over the air for controlling signal transmission as a function of an output of said means for detecting beacon signals, said means for controlling said means for transmitting over the air to transmit a first signal during a second period of time following a first period of time when a beacon signal portion including at least one beacon symbol is not detected during said first period of time, said first signal being a second beacon signal communicating a session priority level of a communications session in which said wireless communications device is a participant. - View Dependent Claims (27, 28, 29, 30, 31)
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32. A non-transitory computer readable medium embodying machine executable instructions for controlling a mobile wireless communications device, to perform the steps of:
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monitoring during a first period of time to detect at least a portion of a first beacon signal including at least one beacon symbol in a first communications band; and when a beacon signal portion including at least one beacon symbol is not detected during said first period of time, transmit a first signal over the air during a second period of time following said first period of time, said first signal being a second beacon signal communicating a session priority level of a communications session in which said wireless communications device is a participant. - View Dependent Claims (33, 34, 35, 36, 37)
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38. An apparatus for use in a mobile wireless communications device, the apparatus comprising:
a processor configured to; monitor during a first period of time to detect at least a portion of a first beacon signal including at least one beacon symbol in a first communications band; and when a beacon signal portion including at least one beacon symbol is not detected during said first period of time, to transmit a first signal over the air during a second period of time following said first period of time, said first signal being a second beacon signal communicating a session priority level of a communications session in which said wireless communications device is a participant. - View Dependent Claims (39, 40, 41, 42, 43)
Specification