OFDMA with block tone assignment for WLAN
First Claim
1. A method, comprising:
- assigning, at an access point (AP) device of a wireless local area network (WLAN), a plurality of different orthogonal frequency division multiplexing (OFDM) sub-channel blocks to a plurality of client stations that are members of the WLAN;
receiving, at the AP device, respective independent data for the plurality of client stations;
generating, at the AP device, an orthogonal frequency division multiple access (OFDMA) data unit that includes a preamble and, for each sub-channel block in the plurality of OFDM sub-channel blocks;
a respective legacy portion of the preamble that spans only the OFDM sub-channel block, the legacy portion including a respective legacy signal field that indicates a duration of the OFDMA data unit,a respective non-legacy signal field in the preamble, the respective non-legacy signal field spanning only the OFDM sub-channel block, andrespective independent data for a respective client station, the respective independent data included within the OFDM sub-channel block; and
transmitting, by the AP device, the OFDMA data unit.
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Accused Products
Abstract
An access point (AP) device of a wireless local area network (WLAN) assigns a plurality of different orthogonal frequency division multiplexing (OFDM) sub-channel blocks to a plurality of client stations that are members of the WLAN. The AP device receives respective independent data for the plurality of client stations, and generates an orthogonal frequency division multiple access (OFDMA) data unit that includes a preamble and, for each sub-channel block in the plurality of OFDM sub-channel blocks: a respective legacy portion of the preamble that spans only the OFDM sub-channel block, the legacy portion including a respective legacy signal field that indicates a duration of the OFDMA data unit, a respective non-legacy signal field in the preamble, the respective non-legacy signal field spanning only the OFDM sub-channel block, and respective independent data for a respective client station, the respective independent data included within the OFDM sub-channel block.
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Citations
34 Claims
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1. A method, comprising:
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assigning, at an access point (AP) device of a wireless local area network (WLAN), a plurality of different orthogonal frequency division multiplexing (OFDM) sub-channel blocks to a plurality of client stations that are members of the WLAN; receiving, at the AP device, respective independent data for the plurality of client stations; generating, at the AP device, an orthogonal frequency division multiple access (OFDMA) data unit that includes a preamble and, for each sub-channel block in the plurality of OFDM sub-channel blocks; a respective legacy portion of the preamble that spans only the OFDM sub-channel block, the legacy portion including a respective legacy signal field that indicates a duration of the OFDMA data unit, a respective non-legacy signal field in the preamble, the respective non-legacy signal field spanning only the OFDM sub-channel block, and respective independent data for a respective client station, the respective independent data included within the OFDM sub-channel block; and transmitting, by the AP device, the OFDMA data unit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus, comprising:
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a wireless local area network (WLAN) network interface device associated with an access point (AP) device of a WLAN, the WLAN network interface device having; one or more integrated circuit (IC) devices, a medium access control (MAC) unit implemented on the one or more IC devices, and a physical layer (PHY) processing unit coupled to the MAC unit and implemented on the one or more IC devices; wherein the one or more IC devices are configured to assign a plurality of different orthogonal frequency division multiplexing (OFDM) sub-channel blocks to a plurality of client stations that are members of the WLAN; wherein the PHY processing unit is configured to; receive respective independent data for the plurality of client stations, and generate an orthogonal frequency division multiple access (OFDMA) data unit that includes a preamble and, for each sub-channel block in the plurality of OFDM sub-channel blocks; a respective legacy portion of the preamble that spans only the OFDM sub-channel block, the legacy portion including a respective legacy signal field that indicates a duration of the OFDMA data unit, a respective non-legacy signal field in the preamble, the respective non-legacy signal field spanning only the OFDM sub-channel block, and respective independent data for a respective client station, the respective independent data included within the OFDM sub-channel block; and wherein the PHY processing unit is further configured to transmit the OFDMA data unit. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method, comprising:
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transmitting, by an access point (AP) device of a wireless local area network (WLAN), a synchronization signal to prompt a plurality of client stations of the WLAN to transmit as part of an uplink orthogonal frequency division multiple access (OFDMA) transmission; and subsequent to transmitting the synchronization signal, receiving, at the AP device, the OFDMA transmission from the plurality of client stations, wherein the OFDMA transmission is responsive to the synchronization signal, and wherein the OFDMA transmission includes, for each orthogonal frequency division multiplex (OFDM) sub-channel block among a plurality of OFDM sub-channel blocks; a respective legacy portion of a preamble that spans only the OFDM sub-channel block, the respective legacy portion including a respective legacy signal field, a respective non-legacy signal field in the preamble, the respective non-legacy signal field spanning only the OFDM sub-channel block, and respective independent data from a respective client station, the respective independent data included within the OFDM sub-channel block. - View Dependent Claims (20, 21, 22, 23, 24)
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25. An apparatus, comprising:
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a wireless local area network (WLAN) network interface device associated with an access point (AP) device of a WLAN, the WLAN network interface device having; one or more integrated circuit (IC) devices, a medium access control (MAC) unit implemented on the one or more IC devices, and a physical layer (PHY) processing unit coupled to the MAC unit and implemented on the one or more IC devices; wherein the PHY processing unit is configured to; transmit a synchronization signal to prompt a plurality of client stations of the WLAN to transmit as part of an uplink orthogonal frequency division multiple access (OFDMA) transmission; subsequent to transmitting the synchronization signal, receive the OFDMA transmission from the plurality of client stations, wherein the OFDMA transmission is responsive to the synchronization signal, and wherein the OFDMA transmission includes, for each orthogonal frequency division multiplex (OFDM) sub-channel block among a plurality of OFDM sub-channel blocks; a respective legacy portion of a preamble that spans only the OFDM sub-channel block, the respective legacy portion including a respective legacy signal field, a respective non-legacy signal field in the preamble, the respective non-legacy signal field spanning only the OFDM sub-channel block, and respective independent data from a respective client station, the respective independent data included within the OFDM sub-channel block. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification