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US 10,383,141 B2Granted
Uplink SDMA transmit opportunity scheduling
AssigneeQUALCOMM Incorporated
InventorMaarten Menzo Wentink
Life of this patent
Estimating the term…
Abstract
Certain aspects of the present disclosure present medium access control (MAC) protocols for uplink Spatial Division Multiple Access (SDMA) transmissions by one or more stations (STAs). An access point (AP) may receive one or more requests for uplink SDMA transmission from a plurality of stations. The access point may schedule the transmissions by sending a signal to the stations to notify them of the parameters of the uplink SDMA transmissions such as start time, duration of the transmission, spatial streams assigned to each station, and so on.
Claims45
A method for wireless communications, comprising:
- receiving, from a plurality of apparatuses, a plurality of request messages for a transmission slot for a spatial division multiple access (SDMA) transmission;
- and
- transmitting a transmit opportunity (TXOP) start frame to each apparatus of the plurality of apparatuses to indicate a start of an SDMA TXOP, wherein the TXOP start frame comprises:
- an indication of the apparatuses that are scheduled to transmit during the SDMA TXOP;
- an indication of one or more spatial streams assigned to each of the apparatuses for transmission during the SDMA TXOP;
- and
- a value for a back-off timer that indicates when a request for acknowledgement can be transmitted by at least one apparatus of the plurality of apparatuses.
4 more elements
A method for wireless communications, comprising:
- transmitting a request message for a transmission slot for a spatial division multiple access (SDMA) transmission;
- receiving a transmit opportunity (TXOP) start frame comprising:
- an indication of a start of an SDMA transmission;
- an indication of a plurality of apparatuses that are scheduled to transmit during the TXOP;
- an indication of one or more spatial streams assigned to each of the apparatuses of the plurality of apparatuses for transmission during the TXOP;
- and
- a value for a back-off timer that indicates when a request for acknowledgement can be transmitted by at least one apparatus of the plurality of apparatuses;
- and
- transmitting SDMA data during a TXOP in accordance with the TXOP start frame.
6 more elements
An apparatus for wireless communications, comprising:
- a receiver configured to receive, from a plurality of apparatuses, a plurality of request messages for a transmission slot for a spatial division multiple access (SDMA) transmission;
- a transmitter configured to transmit a transmit opportunity (TXOP) start frame to each apparatus of the plurality of apparatuses to indicate a start of an SDMA TXOP, wherein the TXOP start frame comprises:
- an indication of the apparatuses that are scheduled to transmit during the SDMA TXOP;
- an indication of one or more spatial streams assigned to each of the apparatuses for transmission during the SDMA TXOP;
- and
- a value for a back-off timer that indicates when a request for acknowledgement can be transmitted by at least one apparatus of the plurality of apparatuses.
3 more elements
An apparatus for wireless communications, comprising:
- a transmitter configured to transmit a request message for a transmission slot for a spatial division multiple access (SDMA) transmission;
- a receiver configured to receive a transmit opportunity (TXOP) start frame comprising:
- an indication of a start of an SDMA transmission;
- an indication of a plurality of apparatuses that are scheduled to transmit during the TXOP;
- an indication of one or more spatial streams assigned to each of the apparatuses of the plurality of apparatuses for transmission during the TXOP;
- and
- a value for a back-off timer that indicates when a request for acknowledgement can be transmitted by at least one apparatus of the plurality of apparatuses;
- and
- wherein the transmitter is further configured to transmit SDMA data during a TXOP in accordance with the TXOP start frame.
6 more elements
An apparatus for wireless communications, comprising:
- means for receiving, from a plurality of apparatuses, a plurality of request messages for a transmission slot for a spatial division multiple access (SDMA) transmission;
- means for transmitting a transmit opportunity (TXOP) start frame to each apparatus of the plurality of apparatuses to indicate a start of an SDMA TXOP, wherein the TXOP start frame comprises:
- an indication of the apparatuses that are scheduled to transmit during the SDMA TXOP;
- an indication of one or more spatial streams assigned to each of the apparatuses for transmission during the SDMA TXOP;
- and
- a value for a back-off timer that indicates when a request for acknowledgement can be transmitted by at least one apparatus of the plurality of apparatuses.
3 more elements
An apparatus for wireless communications, comprising:
- means for transmitting a request message for a transmission slot for a spatial division multiple access (SDMA) transmission;
- means for receiving a transmit opportunity (TXOP) start frame comprising;
- an indication of a start of an SDMA transmission
- an indication of a plurality of apparatuses that are scheduled to transmit during the TXOP;
- an indication of one or more spatial streams assigned to each of the apparatuses for transmission during the TXOP;
- and
- a value for a back-off timer that indicates when a request for acknowledgement can be transmitted by at least one apparatus of the plurality of apparatuses;
- and
- wherein the means for transmitting further comprises means for transmitting SDMA data during a TXOP in accordance with the TXOP start frame.
6 more elements
A computer-readable storage device comprising instructions executable for:
- receiving, from a plurality of apparatuses, a plurality of request messages for a transmission slot for a spatial division multiple access (SDMA) transmission;
- and
- transmitting a transmit opportunity (TXOP) start frame to each apparatus of the plurality of apparatuses to indicate a start of an SDMA TXOP, wherein the TXOP start frame comprises:
- an indication of the apparatuses that are scheduled to transmit during the SDMA TXOP;
- an indication of one or more spatial streams assigned to each of the apparatuses for transmission during the SDMA TXOP;
- and
- a value for a back-off timer that indicates when a request for acknowledgement can be transmitted by at least one apparatus of the plurality of apparatuses.
4 more elements
A computer-readable storage device comprising instructions executable for:
- transmitting a request message for a transmission slot for a spatial division multiple access (SDMA) transmission;
- receiving a transmit opportunity (TXOP) start frame comprising:
- an indication of a start of an SDMA transmission;
- an indication of a plurality of apparatuses that are scheduled to transmit during the TXOP
- an indication of one or more spatial streams assigned to each apparatus of the plurality of apparatuses for transmission during the TXOP;
- and
- a value for a back-off timer that indicates when a request for acknowledgement can be transmitted by at least one apparatus of the plurality of apparatuses;
- and
- transmitting SDMA data during a TXOP in accordance with the TXOP start frame.
6 more elements
An access point for wireless communications, comprising:
- a plurality of antennas,
- a receiver configured to receive, via the plurality of antennas, from a plurality of apparatuses, a plurality of request messages for a transmission slot for a spatial division multiple access (SDMA) transmission;
- a transmitter configured to transmit a transmit opportunity (TXOP) start frame to each apparatus of the plurality of the apparatuses to indicate a start of an SDMA TXOP, wherein the TXOP start frame comprises:
- an indication of the apparatuses that are scheduled to transmit during the SDMA TXOP;
- an indication of one or more spatial streams assigned to each of the apparatuses for transmission during the SDMA TXOP;
- and
- a value for a back-off timer that indicates when a request for acknowledgement can be transmitted by at least one apparatus of the plurality of apparatuses.
4 more elements
A station for wireless communications, comprising:
- at least one antenna;
- a transmitter configured to transmit, via the at least one antenna, a request message for a transmission slot for a spatial division multiple access (SDMA) transmission;
- a receiver configured to receive a transmit opportunity (TXOP) start frame comprising:
- an indication of a start of an SDMA transmission
- an indication of a plurality of stations that are scheduled to transmit during the TXOP
- an indication of one or more spatial streams assigned to each station of the plurality of stations for transmission during the TXOP;
- and
- a value for a back-off timer that indicates when a request for acknowledgement can be transmitted by at least one apparatus of the plurality of apparatuses;
- and
- wherein the transmitter is further configured to transmit SDMA data during a TXOP in accordance with the TXOP start frame.
7 more elements
Dependencies are inferred from the claim text.