Enhancements for coordinated orthogonal block-based resource allocation (COBRA) in WLAN systems
First Claim
1. A method performed by an access point (AP), the method comprising:
- transmitting a multi-user MU request to send (RTS) frame to a plurality of stations (STAs), the MU RTS frame comprising a duration field;
wherein the MU RTS frame solicits clear to send (CTS) frame responses from the plurality of STAs;
receiving, from the plurality of STAs, simultaneous uplink (UL) orthogonal frequency division multiple access (OFDMA) transmissions in response to the MU RTS fame;
transmitting, to the plurality of STAs, another frame comprising UL transmission information for transmission of data frames by the plurality of STAs, wherein the UL transmission information includes a plurality of modulation and coding scheme (MCS) indicators, a plurality of data stream number indicators and a plurality of frequency resource allocations;
receiving, from the plurality of STAs, the data frames simultaneously in accordance with the MCS indicators, the data stream number indicators and the plurality of frequency resource allocations; and
transmitting an acknowledgement of the received data frames, to the plurality of STAs.
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Abstract
A method and apparatus for supporting UL MU diversity are provided. The method may comprise transmitting a MU RTS frame to a plurality of STAs, the MU RTS frame comprising a plurality of MCS indicators, a plurality of data stream number indicators, an indication of a spatial technology, and a duration field. The MU RTS frame solicits clear to send (CTS) frame responses from a plurality of STAs and simultaneous UL OFDMA transmissions may be received in accordance with the MCS indicators, the data stream number indicators and the indicated spatial technology. An AP may transmit another frame comprising UL transmission information for transmission of data frames by the plurality of STAs. The AP may receive from the plurality of STAs, the data frames simultaneously and may additionally transmit acknowledgements of the received data frames to the plurality of STAs.
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Citations
20 Claims
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1. A method performed by an access point (AP), the method comprising:
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transmitting a multi-user MU request to send (RTS) frame to a plurality of stations (STAs), the MU RTS frame comprising a duration field;
wherein the MU RTS frame solicits clear to send (CTS) frame responses from the plurality of STAs;receiving, from the plurality of STAs, simultaneous uplink (UL) orthogonal frequency division multiple access (OFDMA) transmissions in response to the MU RTS fame; transmitting, to the plurality of STAs, another frame comprising UL transmission information for transmission of data frames by the plurality of STAs, wherein the UL transmission information includes a plurality of modulation and coding scheme (MCS) indicators, a plurality of data stream number indicators and a plurality of frequency resource allocations; receiving, from the plurality of STAs, the data frames simultaneously in accordance with the MCS indicators, the data stream number indicators and the plurality of frequency resource allocations; and transmitting an acknowledgement of the received data frames, to the plurality of STAs. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An access point (AP) comprising:
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a transmitter configured to transmit a multi-user (MU) request to send (RTS) frame, to a plurality of stations (STAs), the MU RTS frame comprising a duration field;
wherein the MU RTS frame solicits clear to send (CTS) frame responses from the plurality of STAs;a receiver configured to receive, from the plurality of STAs, simultaneous uplink (UL) orthogonal frequency-division multiple access (OFDMA) transmissions in response to the MU RTS frame; the transmitter further configured to transmit, to the plurality of STAs, another frame comprising UL transmission information for transmission of data frames by the plurality of STAs, wherein the UL transmission information includes a plurality of modulation and coding scheme (MCS) indicators, a plurality of data stream number indicators and a plurality of frequency resource allocations; the receiver further configured to receive, from the plurality of STAs, the data frames simultaneously in accordance with the MCS indicators, the data stream number indicators and the plurality of frequency resource allocations; and the transmitter further configured to transmit an acknowledgement of the received data frames to the plurality of STAs. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method performed by a station (STA), the method comprising:
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receiving a multi-user MU request to send (RTS) frame, from an access point (AP), the MU RTS frame comprising a a duration field;
wherein the MU RTS frame solicits clear to send (CTS) frame responses from a plurality of STAs;transmitting an uplink (UL) MU orthogonal frequency-division multiple access (OFDMA) transmission, in response to the MU RTS frame, simultaneously with another STA of the plurality of STAs; receiving, another frame comprising UL transmission information for transmission of data frames by the plurality of STAs, wherein the UL transmission information includes a plurality of modulation and coding scheme (MCS) indicators, a plurality of data stream number indicators and a pluarlity of frequency resource allocations; transmitting, to the AP, a data frame of the data frames simultaneously with the another STA in accordance with at least one of the the MCS indicators, at least one of the data stream number indicators and at least one of the plurality of frequency resource allocations; and receiving an acknowledgement corresponding to the transmitted data frame, wherein the acknowledgement is transmitted to at least the STA and the another STA. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification