Method and apparatus for transmission management in a wireless communication system
AssigneeInterDigital Technology Corporation
InventorsMohammed Sammour, Sudheer A. Grandhi, Robert Lind Olesen
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Abstract
In a wireless communication system comprising at least one access point (AP) and a plurality of stations (STAs), a method for transmission management of the wireless medium comprises the AP configuring a Multiple Receiver Aggregate Multi-Poll/Power Save Aggregation Descriptor (MMP/PSAD) frame with scheduled Uplink Transmission Time (ULT) information for the plurality of STAs. The AP then transmits the MMP/PSAD frame to the plurality of STAs. Upon successfully receiving and decoding the MMP/PSAD frame, STAs transmit during their scheduled ULT.
Claims42
A method for use in an Institute of Electrical and Electronics Engineers (IEEE) 802.11 access point (AP), the method comprising:
- transmitting, to a plurality of IEEE 802.11 stations (STAB), a first power save frame that includes a plurality of Downlink Transmission Times (DLTs) and a plurality of Uplink Transmission Times (ULTs), wherein each of the plurality of DLTs and the plurality of ULTs comprise a start offset field and a duration field;
- monitoring a wireless medium during each of the plurality of ULTs for an uplink transmission from a respective IEEE 802.11 STA;
- and
- on a condition that the IEEE 802.11 AP fails to receive an uplink transmission from one of the plurality of IEEE 802.11 STAB during a respective ULT, transmitting a second power save frame to the plurality of IEEE 802.11 STAB, wherein the second power save frame includes a modified ULT for the IEEE 802.11 STA that failed to transmit during its respective ULT and an unmodified ULT for an IEEE 802.11 STA that has yet to transmit during its respective ULT, wherein the second power save frame is transmitted before the ULT associated with the IEEE 802.11 STA that has yet to transmit.
An Institute of Electrical and Electronics Engineers (IEEE) 802.11 station (STA) comprising:
- a transmitter;
- a receiver configured to receive a first power save frame that includes a plurality of Downlink Transmission Times (DLTs) and a plurality of Uplink Transmission Times (ULTs), wherein each of the plurality of DLTs and the plurality of ULTs comprise a start offset field and a duration field, and wherein one of the plurality of ULTs is a scheduled ULT for the IEEE 802.11 STA;
- wherein, on a condition that the transmitter does not transmit during the scheduled ULT for the IEEE 802.11 STA, the receiver is further configured to receive a second power save frame that includes a modified ULT for the IEEE 802.11 STA and an unmodified ULT for an IEEE 802.11 STA that has yet to transmit during its respective ULT, wherein the second power save frame is received before the ULT associated with the IEEE 802.11 STA that has yet to transmit;
- and
- wherein the transmitter is configured to transmit packet data based on the modified ULT for the IEEE 802.11 STA.
An Institute of Electrical and Electronics Engineers (IEEE) 802.11 access point (AP) comprising:
- a receiver;
- a transmitter configured to transmit, to a plurality of IEEE 802.11 stations (STAs), a first power save frame that includes a plurality of Downlink Transmission Times (DLTs) and a plurality of Uplink Transmission Times (ULTs), wherein each of the plurality of DLTs and the plurality of ULTs comprise a start offset field and a duration field;
- and
- a processor in communication with the receiver and the transmitter, the processor configured to monitor a wireless medium during each of the plurality of ULTs for an uplink transmission from a respective IEEE 802.11 STA;
- wherein, on a condition that the IEEE 802.11 AP fails to receive an uplink transmission from one of the plurality of IEEE 802.11 STAs during a respective ULT, the transmitter is further configured to transmit a second power save frame that includes a modified ULT for the IEEE 802.11 STA that failed to transmit during its respective ULT and an unmodified ULT for an IEEE 802.11 STA that has yet to transmit during its respective ULT, wherein the second power save frame is transmitted before the ULT associated with the IEEE 802.11 STA that has yet to transmit.
A method for use in an Institute of Electrical and Electronics Engineers (IEEE) station (STA), the method comprising:
- receiving a first power save frame that includes a plurality of scheduled Downlink Transmission Times (DLTs) and a plurality of Uplink Transmission Times (ULTs), wherein each of the plurality of DLTs and the plurality of ULTs comprise a start offset field and a duration field, and wherein one of the plurality of ULTs is a scheduled ULT for the IEEE 802.11 STA;
- receiving, on a condition that the IEEE 802.11 STA does not transmit during the scheduled ULT for the IEEE 802.11 STA, a second power save frame that includes a modified ULT for the IEEE 802.11 STA and an unmodified ULT for an IEEE 802.11 STA that has yet to transmit during its respective ULT, wherein the second power save frame is received before the ULT associated with the IEEE 802.11 STA that has yet to transmit;
- and
- transmitting packet data based on the modified ULT for the IEEE 802.11 STA.
Dependencies are inferred from the claim text.