System and Method for WLAN OFDMA Design of Uplink and Downlink Transmissions
First Claim
1. A method by an access point (AP) for Orthogonal Frequency Division Multiple Access (OFDMA) downlink transmission in a Wireless Local Area Network (WLAN), the method comprising:
- sending a signaling requesting protection of a transmission channel for downlink transmissions from access by stations (STAs) associated with the AP;
sending an OFDMA physical layer Protocol Data Unit (PPDU) to the STAs;
sending a Block Acknowledgement Request (BAR) to the STAs; and
receiving a Block Acknowledgement (BA) from each one of the STAs.
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Accused Products
Abstract
Embodiments are provided for WLAN OFDMA operations in uplink and downlink transmissions. For OFDMA downlink transmission, an access point (AP) sends a signaling requesting protection of a transmission channel from access by stations (STAs) associated with the AP. The AP then sends an OFDMA physical layer Protocol Data Unit (PPDU) and a Block Acknowledgement Request (BAR) to the STAs, and receives a Block Acknowledgement (BA) from each one of the STAs. For OFDMA uplink transmissions, an STA sends a signaling requesting protection of a transmission channel from access by the AP. The STA then sends, to the AP, a frame indicating start of OFDMA transmission by the STA, and receives, from the AP, an OFDMA Begin Receive (OBR) frame, which is sent by the AP to participating STAs. The STA then sends an OFDMA PPDU and a BAR to the AP, and receives a BA in return.
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Citations
27 Claims
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1. A method by an access point (AP) for Orthogonal Frequency Division Multiple Access (OFDMA) downlink transmission in a Wireless Local Area Network (WLAN), the method comprising:
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sending a signaling requesting protection of a transmission channel for downlink transmissions from access by stations (STAs) associated with the AP; sending an OFDMA physical layer Protocol Data Unit (PPDU) to the STAs; sending a Block Acknowledgement Request (BAR) to the STAs; and receiving a Block Acknowledgement (BA) from each one of the STAs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method by a station (STA) for Orthogonal Frequency Division Multiple Access (OFDMA) downlink transmission in a Wireless Local Area Network (WLAN), the method comprising:
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detecting a signaling from an access point (AP), the signaling indicating the AP requesting protection of a transmission channel from access by a plurality of STAs associated with the AP including the STA; receiving, from the AP an OFDMA physical layer Protocol Data Unit (PPDU); receiving, from the AP, a Block Acknowledgement Request (BAR), wherein the BAR is sent to the STAs; and sending, to the AP, a Block Acknowledgement (BA). - View Dependent Claims (11, 12)
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13. A method by a station (STA) for Orthogonal Frequency Division Multiple Access (OFDMA) uplink transmissions in a Wireless Local Area Network (WLAN), the method comprising:
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sending a signaling requesting protection of a transmission channel for uplink transmissions from access by an access point (AP) of the STA; sending, to the AP, a frame indicating start of OFDMA transmission by the STA; receiving, from the AP, an OFDMA Begin Receive (OBR) frame, wherein the OBR frame is sent by the AP to a plurality of STAs associated with the AP including the STA; sending, to the AP, an Orthogonal Frequency Division Multiple Access (OFDMA) physical layer Protocol Data Unit (PPDU); sending a Block Acknowledgement Request (BAR) to the AP; and receiving a Block Acknowledgement (BA) from the AP. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A method by an access point (AP) for Orthogonal Frequency Division Multiple Access (OFDMA) uplink transmission in a Wireless Local Area Network (WLAN), the method comprising:
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detecting a signaling from a station (STA), the signaling indicating the STA requesting protection of a transmission channel from access by the AP; receiving, from the STA, a frame indicating start of OFDMA transmission by the STA; sending, to a plurality of STAs associated with the AP including the STA, an OFDMA Begin Receive (OBR) frame; receiving, from the STA, an OFDMA physical layer Protocol Data Unit (PPDU); receiving, from the STA, a Block Acknowledgement Request (BAR); and sending, to the STA, a Block Acknowledgement (BA). - View Dependent Claims (21, 22, 23)
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24. An access point (AP) supporting Orthogonal Frequency Division Multiple Access (OFDMA) transmission in a Wireless Local Area Network (WLAN), the AP comprising:
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a processor; and a computer readable storage medium storing programming for execution by the processor, the programming including instructions to; send a signaling requesting protection of a transmission channel from access by stations (STAs) associated with the AP; send an Orthogonal Frequency Division Multiple Access (OFDMA) physical layer Protocol Data Unit (PPDU) to the STAs; send a Block Acknowledgement Request (BAR) to the STAs; and receive a Block Acknowledgement (BA) from each one of the STAs. - View Dependent Claims (25)
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26. A user station supporting Orthogonal Frequency Division Multiple Access (OFDMA) transmission in a Wireless Local Area Network (WLAN), the user station comprising:
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a processor; and a computer readable storage medium storing programming for execution by the processor, the programming including instructions to; send a signaling requesting protection of a transmission channel from access by an access point (AP) of the user station; send, to the AP, a frame indicating start of OFDMA transmission by the STA; receive, from the AP, an OFDMA Begin Receive (OBR) frame, wherein the OBR frame is sent by the AP to a plurality of STAs associated with the AP including the user station; send, to the AP, an OFDMA physical layer Protocol Data Unit (PPDU); send a Block Acknowledgement Request (BAR) to the AP; and receive a Block Acknowledgement (BA) from the AP. - View Dependent Claims (27)
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Specification