Methods and systems for providing efficient operation of multiple modes in a WLAN system
First Claim
Patent Images
1. A method for use in an access point (AP), the method comprising:
- receiving a request-to-send (RTS) frame from a station (STA), wherein the RTS frame indicates a request for a transmit opportunity (TXOP);
transmitting, in response to the RTS frame, an indication of a TXOP, wherein the indication of a TXOP is a clear-to-send (CTS) frame;
receiving packet data from the STA during the TXOP;
receiving, on a condition that the STA does not have further packet data to transmit, an indication of truncation of the TXOP including a first space-time block code (STBC) contention free (CF)-End frame or a first non-STBC CF-End frame; and
transmitting a second STBC CF-End frame and a second non-STBC CF-End frame.
0 Assignments
0 Petitions
Accused Products
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.
-
Citations
20 Claims
-
1. A method for use in an access point (AP), the method comprising:
-
receiving a request-to-send (RTS) frame from a station (STA), wherein the RTS frame indicates a request for a transmit opportunity (TXOP); transmitting, in response to the RTS frame, an indication of a TXOP, wherein the indication of a TXOP is a clear-to-send (CTS) frame; receiving packet data from the STA during the TXOP; receiving, on a condition that the STA does not have further packet data to transmit, an indication of truncation of the TXOP including a first space-time block code (STBC) contention free (CF)-End frame or a first non-STBC CF-End frame; and transmitting a second STBC CF-End frame and a second non-STBC CF-End frame. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. An access point (AP) comprising:
-
a receiver configured to receive a request-to-send (RTS) frame from a station (STA), wherein the RTS frame indicates a request for a transmit opportunity (TXOP); and a transmitter configured to transmit, in response to the RTS frame, an indication of a TXOP, wherein the indication of a TXOP is a clear-to-send (CTS) frame; wherein the receiver is further configured to receive packet data from the STA during the TXOP, and receive, on a condition that the STA does not have further packet data to transmit, an indication of truncation of the TXOP including a first space-time block code (STBC) contention free (CF)-End frame or a first non-STBC CF-End frame; and wherein the transmitter is further configured to transmit a second STBC CF-End frame and a second non-STBC CF-End frame. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
-
15. A method for use in a station (STA), the method comprising:
-
transmitting a request-to-send (RTS) frame to an access point (AP), wherein the RTS frame indicates a request for a transmit opportunity (TXOP); receiving, in response to the RTS frame, an indication of a TXOP, wherein the indication of a TXOP is a clear-to-send (CTS) frame; transmitting packet data using space-time block code (STBC) to the AP during the TXOP; and transmitting, on a condition that the STA does not have further packet data to transmit, an indication of truncation of the TxOP including a first STBC CF-End frame; and receiving a second STBC CF-End frame from the AP in response to the transmission of the indication of truncation of the TxOP and a non-STBC CF-End frame. - View Dependent Claims (16, 17)
-
-
18. A station (STA) comprising:
-
a transmitter configured to transmit a request-to-send (RTS) frame to an access point (AP), wherein the RTS frame indicates a request for a transmit opportunity (TXOP); and a receiver configured to receive, in response to the RTS frame, and indication of a TXOP, wherein the indication of a TXOP is a clear-to-send (CTS) frame; wherein the transmitter is further configured to transmit packet data to the AP during the TXOP, and transmit, on a condition that the STA does not have further packet data to transmit, an indication of truncation of the TXOP including a space-time block code (STBC) CF-End frame and a non-STBC CF-End frame. - View Dependent Claims (19, 20)
-
Specification