Methods and systems for providing efficient operation of multiple modes in a WLAN system
First Claim
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1. A method for use in an access point (AP), the method comprising:
- transmitting packet data to a station (STA) during a transmission opportunity (TXOP); and
transmitting, on a condition that the AP does not have further packet data to transmit, an indication of truncation of the TXOP including a space-time block code (STBC) contention free (CF)-End frame and a non-STBC CF-End frame.
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Abstract
A method and apparatus that applies medium access control (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 may also apply to a single mode. 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.
20 Citations
22 Claims
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1. A method for use in an access point (AP), the method comprising:
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transmitting packet data to a station (STA) during a transmission opportunity (TXOP); and transmitting, on a condition that the AP does not have further packet data to transmit, an indication of truncation of the TXOP including a space-time block code (STBC) contention free (CF)-End frame and a non-STBC CF-End frame. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An access point (AP) comprising:
a transmitter configured to transmit packet data to a station (STA) during a transmission opportunity (TXOP), wherein the transmitter is further configured to transmit, on a condition that the AP does not have further packet data to transmit, an indication of truncation of the TXOP including a space-time block code (STBC) contention free (CF)-End frame and a non-STBC CF-End frame. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for use in a station (STA), the method comprising:
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receiving packet data from an access point (AP) during a transmission opportunity (TXOP) held by the AP; and receiving a space-time block code (STBC) CF-End frame that indicates truncation of the TXOP held by the AP and receiving a non-STBC CF-End frame that indicates truncation of the TXOP held by the AP. - View Dependent Claims (16, 17, 18)
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19. A station (STA) comprising:
a receiver configured to receive packet data from an access point (AP) during a transmission opportunity (TXOP) held by the AP, wherein the receiver is further configured to receive a space-time block code (STBC) CF-End frame that indicates truncation of the TXOP held by the AP and a non-STBC CF-End frame that indicates truncation of the TXOP held by the AP. - View Dependent Claims (20, 21, 22)
Specification