Physical layer frame format for WLAN
First Claim
1. A method for generating a physical layer (PHY) data unit that conforms to a first communication protocol, the method comprising:
- generating, at a first communication device, a PHY preamble for the PHY data unit, including;
generating a legacy portion of the PHY preamble to include a legacy signal field, wherein the legacy portion of the PHY preamble is decodable by one or more second communication devices that conform to a second communication protocol, but do not conform to the first communication protocol, to determine a duration of the PHY data unit based on the legacy portion of the PHY preamble, andincluding a duplicate of the legacy signal field in the PHY preamble, wherein presence of the duplicate of the legacy signal field indicates to one or more third communication devices that conform to the first communication protocol that the PHY data unit conforms to the first communication protocol; and
generating, at the first communication device, the PHY data unit to include the PHY preamble and a PHY payload, the PHY data unit for transmission via a communication channel.
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Accused Products
Abstract
A first communication device generates a physical layer (PHY) preamble for a PHY data unit to be transmitted via a communication channel, the PHY data unit conforming to a first communication protocol. Generating the PHY preamble includes generating a legacy portion of the PHY preamble to include a legacy signal field, which is decodable by one or more second communication devices that conform to a second communication protocol to determine a duration of the PHY data unit. The PHY preamble is generated to also include a duplicate of the legacy signal field in the PHY preamble, wherein presence of the duplicate of the legacy signal field indicates to one or more third communication devices that conform to the first communication protocol that the PHY data unit conforms to the first communication protocol. The first communication device generates the PHY data unit to include the PHY preamble and a PHY payload.
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Citations
20 Claims
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1. A method for generating a physical layer (PHY) data unit that conforms to a first communication protocol, the method comprising:
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generating, at a first communication device, a PHY preamble for the PHY data unit, including; generating a legacy portion of the PHY preamble to include a legacy signal field, wherein the legacy portion of the PHY preamble is decodable by one or more second communication devices that conform to a second communication protocol, but do not conform to the first communication protocol, to determine a duration of the PHY data unit based on the legacy portion of the PHY preamble, and including a duplicate of the legacy signal field in the PHY preamble, wherein presence of the duplicate of the legacy signal field indicates to one or more third communication devices that conform to the first communication protocol that the PHY data unit conforms to the first communication protocol; and generating, at the first communication device, the PHY data unit to include the PHY preamble and a PHY payload, the PHY data unit for transmission via a communication channel. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus, comprising:
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a network interface device associated with a first communication device, the network interface device comprising one or more integrated circuits (ICs) configured to; generate a PHY preamble for the PHY data unit, including; generating a legacy portion of the PHY preamble to include a legacy signal field, wherein the legacy portion of the PHY preamble is decodable by one or more second communication devices that conform to a second communication protocol, but do not conform to the first communication protocol, to determine a duration of the PHY data unit based on the legacy portion of the PHY preamble, and including a duplicate of the legacy signal field in the PHY preamble, wherein presence of the duplicate of the legacy signal field indicates to one or more third communication devices that conform to the first communication protocol that the PHY data unit conforms to the first communication protocol; and wherein the one or more ICs are further configured to generate the PHY data unit to include the PHY preamble and a PHY payload, the PHY data unit for transmission via a communication channel. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification