Signaling phy preamble formats
DCFirst Claim
1. A method, comprising:
- determining, at a communication device, a format according to which a physical layer (PHY) data unit is to be generated;
selecting, at the communication device, i) length information to be included in a field in a legacy portion of a PHY preamble of the PHY data unit, and ii) a phase of modulation of an orthogonal frequency division modulation (OFDM) symbol in a non-legacy portion of the PHY preamble, whereinthe length information and the phase of modulation are selected to indicate the format from a set of multiple PHY formats defined by a communication protocol;
generating, at the communication device, the PHY data unit to include the selected length information in the field in the legacy portion of the PHY preamble and to modulate the OFDM symbol in the non-legacy portion of the PHY preamble with the selected phase; and
transmitting, by the communication device, the PHY data unit.
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Abstract
A communication device determines a format according to which a physical layer (PHY) data unit is to be generated. The communication device selects i) length information to be included in a field in a legacy portion of a PHY preamble of the PHY data unit, and ii) a phase of modulation of an orthogonal frequency division modulation (OFDM) symbol in a non-legacy portion of the PHY preamble, wherein the length information and the phase of modulation are selected to indicate the format from a set of multiple PHY formats defined by a communication protocol. The communication device generates the PHY data unit to include the selected length information in the field in the legacy portion of the PHY preamble and to modulate the OFDM symbol in the non-legacy portion of the PHY preamble with the selected phase, and transmits the PHY data unit.
97 Citations
20 Claims
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1. A method, comprising:
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determining, at a communication device, a format according to which a physical layer (PHY) data unit is to be generated; selecting, at the communication device, i) length information to be included in a field in a legacy portion of a PHY preamble of the PHY data unit, and ii) a phase of modulation of an orthogonal frequency division modulation (OFDM) symbol in a non-legacy portion of the PHY preamble, wherein the length information and the phase of modulation are selected to indicate the format from a set of multiple PHY formats defined by a communication protocol; generating, at the communication device, the PHY data unit to include the selected length information in the field in the legacy portion of the PHY preamble and to modulate the OFDM symbol in the non-legacy portion of the PHY preamble with the selected phase; and transmitting, by the communication device, the PHY data unit. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus, comprising:
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a network interface device having one or more integrated circuits (ICs) configured to determine a format according to which a physical layer (PHY) data unit is to be generated; select i) length information to be included in a field in a legacy portion of a PHY preamble of the PHY data unit, and ii) a phase of modulation of an orthogonal frequency division modulation (OFDM) symbol in a non-legacy portion of the PHY preamble, wherein the length information and the phase of modulation are selected to indicate the format from a set of multiple PHY formats defined by a communication protocol; wherein the one or more ICs are further configured to generate the data unit to include the selected length information in the field in the legacy portion of the PHY preamble and to modulate the OFDM symbol in the non-legacy portion of the PHY preamble with the selected phase, and transmit the data unit. - View Dependent Claims (7, 8, 9, 10)
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11. A method, comprising:
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receiving, at a communication device, a physical layer (PHY) data unit via a communication channel; analyzing, at the communication device, i) length information in a field in a legacy portion of a PHY preamble of the PHY data unit, and ii) a phase of modulation of an orthogonal frequency division modulation (OFDM) symbol in a non-legacy portion of the PHY preamble; determining, at the communication device, a format of the received PHY data unit corresponding to the analysis of i) the length information and ii) the phase of modulation of the OFDM symbol in the non-legacy portion of the PHY preamble; and processing, at the communication device, the received PHY data unit according to the determined format. - View Dependent Claims (12, 13, 14, 15)
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16. An apparatus, comprising:
a network interface device having one or more integrated circuits (ICs) configured to receive a physical layer (PHY) data unit via a communication channel, analyze i) length information in a field in a legacy portion of a PHY preamble of the PHY data unit, and ii) a phase of modulation of an orthogonal frequency division modulation (OFDM) symbol in a non-legacy portion of the PHY preamble, determine a format of the received PHY data unit corresponding to the analysis of i) the length information and ii) the phase of modulation of the OFDM symbol in the non-legacy portion of the PHY preamble, and process the received PHY data unit according to the determined format. - View Dependent Claims (17, 18, 19, 20)
Specification