METHOD AND APPARATUS FOR PROTECTING HIGH THROUGHPUT STATIONS
First Claim
1. A high throughput (HT) transmission method implemented in a wireless communication system including a first type of station (STA) and a second type of STA, the method comprising:
- the first STA transmitting at least one HT physical layer (PHY) packet data unit (PPDU), the PPDU including an HT preamble and an HT PHY payload, the HT preamble including information associated with the HT PHY payload;
the second STA receiving the PPDU from the first STA; and
the second STA extracting the information associated with the HT PHY payload from the HT preamble without being able to decode the HT PHY payload.
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Accused Products
Abstract
A method and apparatus for protecting high throughput (HT) stations (STAs) are disclosed. In one embodiment, a physical layer (PHY) legacy preamble transmitted by one STA is decoded by another STA that does not use a legacy preamble. In another embodiment, one STA is identified by another STA by using bits in the preamble of a packet to indicate which PHY type will be used in the remaining portion of the packet. In yet another embodiment, one STA sends ready-to-send (RTS)/clear-to-send (CTS) or CTS-to-self messages for reserving a medium in the presence of another STA of a different type than the one STA. In yet another embodiment, an access point (AP) transmits a beacon or an association message including a capability information element (IE) that indicates operation or support for a legacy preamble, HT STA preambles and a medium access control (MAC) packet transmission with HT protection mechanisms.
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Citations
19 Claims
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1. A high throughput (HT) transmission method implemented in a wireless communication system including a first type of station (STA) and a second type of STA, the method comprising:
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the first STA transmitting at least one HT physical layer (PHY) packet data unit (PPDU), the PPDU including an HT preamble and an HT PHY payload, the HT preamble including information associated with the HT PHY payload;
the second STA receiving the PPDU from the first STA; and
the second STA extracting the information associated with the HT PHY payload from the HT preamble without being able to decode the HT PHY payload. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A high throughput (HT) station (STA) comprising:
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a transmitter for transmitting protected HT transmissions;
a processor for generating at least one HT physical layer (PHY) packet data unit (PPDU), the PPDU including an HT preamble and an HT PHY payload, the HT preamble including information associated with the HT PHY payload; and
a receiver for decoding legacy PHY preambles received from other HT STAs. - View Dependent Claims (12, 13, 14, 15)
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16. A method of protecting high throughput (HT) transmissions, the method comprising:
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a non-access point (non-AP) station (STA) initiating a transmit opportunity (TXOP) by transmitting a request signal including a ready-to-send (RTS) frame to an access point (AP); and
the AP responding to the non-AP STA with a response clear-to-send (CTS) frame. - View Dependent Claims (17)
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18. An access point (AP) comprising:
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a processor configured to generate an association message, wherein the association message includes a capability information element (IE) having a plurality of fields which indicate operation or support for a legacy preamble, high throughput (HT) station (STA) preambles and a medium access control (MAC) packet transmission with HT protection mechanisms;
an antenna; and
a transmitter electrically coupled to the processor and the antenna for transmitting the association message.
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19. An access point (AP) comprising:
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a processor configured to generate a beacon, wherein the beacon includes a capability information element (IE) having a plurality of fields which indicate operation or support for a legacy preamble, high throughput (HT) station (STA) preambles and a medium access control (MAC) packet transmission with HT protection mechanisms;
an antenna; and
a transmitter electrically coupled to the processor and the antenna for transmitting the beacon.
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Specification