System and method for WLAN OFDMA design of subcarrier groups and frame format
First Claim
1. A method for provisioning subcarriers for orthogonal frequency division multiple access (OFDMA) communications to a plurality of stations (STAs) in a wireless local area network (WLAN), the method comprising:
- signaling, by a network component to the plurality of STAs, a physical layer (PHY) protocol data unit (PPDU) comprising;
a first preamble portion, which is a legacy preamble comprising a Legacy Short Training Field (L-STF), a Legacy Long Training Field (L-LTF), and a Legacy Signal Field (L-SIG) in a non-High Throughput (non-HT) format; and
a second preamble portion, prior to any user data in the PPDU, and comprising a short training field (STF) providing synchronizing information, a long training field (LTF) providing channel estimation information, and a signal (SIG) field including an OFDMA mapping field for mapping subcarrier groups to the plurality of STAs according to a predefined and deterministic grouping structure.
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Abstract
Embodiments are provided for WLAN Orthogonal Frequency Division Multiple Access (OFDMA) design of subcarrier groups and corresponding frame format. An embodiment method includes grouping a plurality of subcarriers for OFDMA transmissions into a plurality of subcarrier groups in accordance with a pre-defined grouping structure for subcarriers. The method further includes allocating the subcarrier groups to a plurality of corresponding users, and signaling, to the users, a map of the subcarrier groups to the corresponding users. According to the pre-defined grouping structure, each one of the subcarrier groups includes a plurality of consecutive subcarriers, a plurality of non-consecutive subcarriers, or a combination of consecutive and non-consecutive subcarriers according to a deterministic structure. The map is signaled using an OFDMA PPDU comprising a legacy preamble portion configured to silence legacy users that do not use OFDMA communications, an OFDMA preamble portion indicating the map, and a data portion.
101 Citations
30 Claims
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1. A method for provisioning subcarriers for orthogonal frequency division multiple access (OFDMA) communications to a plurality of stations (STAs) in a wireless local area network (WLAN), the method comprising:
signaling, by a network component to the plurality of STAs, a physical layer (PHY) protocol data unit (PPDU) comprising; a first preamble portion, which is a legacy preamble comprising a Legacy Short Training Field (L-STF), a Legacy Long Training Field (L-LTF), and a Legacy Signal Field (L-SIG) in a non-High Throughput (non-HT) format; and a second preamble portion, prior to any user data in the PPDU, and comprising a short training field (STF) providing synchronizing information, a long training field (LTF) providing channel estimation information, and a signal (SIG) field including an OFDMA mapping field for mapping subcarrier groups to the plurality of STAs according to a predefined and deterministic grouping structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for provisioning subcarriers for orthogonal frequency division multiple access (OFDMA) communications to a plurality of stations (STAs) in a wireless local area network (WLAN), the apparatus comprising:
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a memory; and a transmitter configured to signal, to the plurality of STAs, a physical layer (PHY) protocol data unit (PPDU) comprising; a first preamble portion, which is a legacy preamble comprising a Legacy Short Training Field (L-STF), a Legacy Long Training Field (L-LTF), and a Legacy Signal Field (L-SIG) in a non-High Throughput (non-HT) format; and a second preamble portion, prior to any user data in the PPDU, and comprising a short training field (STF) providing synchronizing information, a long training field (LTF) providing channel estimation information, and a signal (SIG) field including an OFDMA mapping field for mapping subcarrier groups to the plurality of STAs according to a predefined and deterministic grouping structure. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method for orthogonal frequency division multiple access (OFDMA) communications in a wireless local area network (WLAN), the method comprising:
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receiving, by a station (STA), a physical layer (PHY) protocol data unit (PPDU) comprising; a first preamble portion, which is a legacy preamble comprising a Legacy Short Training Field (L-STF), a Legacy Long Training Field (L-LTF), and a Legacy Signal Field (L-SIG) in a non-High Throughput (non-HT) format; and a second preamble portion, prior to any user data in the PPDU, and comprising a short training field (STF) providing synchronizing information, a long training field (LTF) providing channel estimation information, and a signal (SIG) field including an OFDMA mapping field for mapping subcarrier groups to a plurality of STAs according to a predefined and deterministic grouping structure; and exchanging, by the STA, OFDMA transmissions on one or more subcarriers belonging to one of the subcarrier groups allocated to the STA. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. An apparatus supporting orthogonal frequency division multiple access (OFDMA) communications in a wireless local area network (WLAN), the apparatus comprising:
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a memory; a receiver configured to receive a physical layer (PHY) protocol data unit (PPDU) comprising; a first preamble portion, which is a legacy preamble comprising a Legacy Short Training Field (L-STF), a Legacy Long Training Field (L-LTF), and a Legacy Signal Field (L-SIG) in a non-High Throughput (non-HT) format; and a second preamble portion, prior to any user data in the PPDU, and comprising a short training field (STF) providing synchronizing information, a long training field (LTF) providing channel estimation information, and a signal (SIG) field including an OFDMA mapping field for mapping subcarrier groups to plurality of STAs according to a predefined and deterministic grouping structure; and the receiver and/or a transmitter configured to exchange OFDMA transmissions on one or more subcarriers belonging to one of the subcarrier groups allocated to the STA. - View Dependent Claims (25, 26, 27, 28, 29, 30)
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Specification