Methods and systems for providing efficient operation of multiple modes in a WLAN system
First Claim
Patent Images
1. A method for use in a station (STA), the method comprising:
- receiving an indication of a transmission opportunity (TXOP);
transmitting packet data;
transmitting, on a condition that the STA does not have further packet data to transmit, an indication of truncation of the TXOP; and
receiving a space-time block code (STBC) contention free (CF)-End frame and a non-STBC CF-End frame in response to the indication of truncation of the TXOP.
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Abstract
A method and system applies MAC transmission opportunity (TXOP) protection for multiple mode operation in a WLAN system. In particular, MAC mechanisms are defined to support multiple mode CTS frames, and multiple mode CF-End frames sent by the AP, each in a format appropriate for the corresponding mode which also applies to a single mode as a trivial case. MAC mechanisms permit truncation of TXOP duration for releasing the unused portion of the TXOP when no further data for transmission is available. Release of unused protected TXOP is possible for both protected AP transmissions and STA transmissions.
34 Citations
45 Claims
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1. A method for use in a station (STA), the method comprising:
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receiving an indication of a transmission opportunity (TXOP); transmitting packet data; transmitting, on a condition that the STA does not have further packet data to transmit, an indication of truncation of the TXOP; and receiving a space-time block code (STBC) contention free (CF)-End frame and a non-STBC CF-End frame in response to the indication of truncation of the TXOP. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A station (STA) comprising:
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a receiver configured to receive an indication of a transmission opportunity (TXOP); a transmitter configured to transmit packet data; and a processor configured to determine whether there is further packet data to transmit; wherein the transmitter is further configured to transmit an indication of truncation of the TXOP on a condition that the processor determines that there is no further packet data to transmit, and wherein the receiver is further configured to receive a space-time block code (STBC) contention free (CF)-End frame and a non-STBC CF-End frame in response to the indication of truncation of the TXOP. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method for use in an access point (AP), the method comprising:
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transmitting an indication of a transmission opportunity (TXOP) to a station (STA); receiving a first contention free (CF)-End frame during the TXOP; and transmitting a space-time block code (STBC) CF-End frame and a non-STBC CF-End frame in response to the first CF-End frame. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. An access point (AP) comprising:
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a transmitter configured to transmit an indication of a transmission opportunity (TXOP) to a station (STA); and a receiver configured to receive a first contention free (CF)-End frame from the STA during the TXOP; wherein the transmitter is further configured to transmit a space-time block code (STBC) CF-End frame and a non-STBC CF-End frame in response to the first CF-End frame. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45)
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Specification