COORDINATION IN WIRELESS NETWORKS HAVING DEVICES WITH DIFFERENT PHYSICAL LAYER TRANSMISSION SCHEMES
First Claim
1. A wireless device (200, 310) adapted to communicate in a wireless network (300), the wireless device (200, 310) comprising:
- a transmitter (214) adapted to transmit beacons (325) of a first type using a first transmission scheme that cannot be received by the wireless device (200, 310), and further adapted to transmit beacons (315) of a second type using a second transmission scheme that is different than the first transmission scheme; and
a receiver (212) adapted to receive the beacons (315) of the second type using the second transmission scheme.
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Accused Products
Abstract
A wireless network (300) operates with at least two different types of wireless devices, including Type-A wireless devices (320) that communicate using a first transmission scheme and Type-B wireless devices (310) that communicate using a second transmission scheme. Type-A wireless devices (320) can transmit Type-A beacons (325) using the first transmission scheme. Type-B wireless devices (310) can transmit and receive Type-B beacons (315) using the second transmission scheme. Type-B wireless devices (310) can also transmit Type-A beacons (325) using the first transmission scheme, but cannot receive the Type-A beacons (325). Before establishing communications in a new channel, a Type-B wireless device (310) performs power sensing to detect the presence of any non-Type-B wireless devices (200), and if such wireless devices (200) are detected, it switches to another channel. Otherwise, it transmits a Type-A beacon (325) and a Type-B beacon (315) to establish communications in the channel.
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Citations
18 Claims
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1. A wireless device (200, 310) adapted to communicate in a wireless network (300), the wireless device (200, 310) comprising:
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a transmitter (214) adapted to transmit beacons (325) of a first type using a first transmission scheme that cannot be received by the wireless device (200, 310), and further adapted to transmit beacons (315) of a second type using a second transmission scheme that is different than the first transmission scheme; and a receiver (212) adapted to receive the beacons (315) of the second type using the second transmission scheme. - View Dependent Claims (2, 3, 4, 5, 6)
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7. In a wireless network (300) adapted to include at least two different types of wireless devices including Type-A wireless devices (320) adapted to communicate using a first transmission scheme and Type-B wireless devices (310) adapted to communicate using a second transmission scheme, a method of communication by a Type-B wireless device (310), comprising:
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testing the availability of a first communication channel by performing a power sensing operation to determine whether the channel is being used by any other wireless device (200) that operates using a transmission scheme different from the second transmission scheme; when the power sensing indicates that the channel is being used by another wireless device (200) that operates using a transmission scheme different from the second transmission scheme, then switching to another channel and performing a new power sensing operation in the other channel; and when the power sensing indicates that that the channel is not being used by any other wireless device (320) that operates using a transmission scheme different from the second transmission scheme, then transmitting a beacon (325) of a first type using the first transmission scheme that cannot be received by the Type-B wireless device (310), and transmitting a beacon (315) of a second type using the second transmission scheme. - View Dependent Claims (8, 9, 10, 11)
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12. In a wireless network (300) adapted to include at least two different types of wireless devices including Type-A wireless devices (320) adapted to communicate using a first transmission scheme and Type-B wireless devices (310) adapted to communicate using a second transmission scheme different from the first transmission scheme, a method of communication by a first Type-A wireless device (320), comprising:
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searching a channel for any beacons (325) of a first type transmitted using the first transmission scheme that cannot be received by the Type-B wireless devices (310); decoding any received beacons (325) of the first type to determine if any wireless devices (200) other than Type-A wireless devices (320) are operating in the channel; and when no beacons (325) of the first type are received that indicate that any wireless devices (200) other than Type-A wireless devices (320) are operating in the channel, then transmitting in the channel a beacon (325) of the first type using the first transmission scheme that cannot be received by the Type-B wireless devices (310). - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification