Intellectual Ventures I LLC

Xocyst Transfer Ag L.l.c.

Menzo Wentink

Various embodiments of symmetric transmit opportunity (TXOP) truncation (STT) systems and methods are disclosed. One method embodiment, among others, comprises receiving a frame that truncates a TXOP around a first station, and responsive to receiving the frame, sending a second frame that truncates the TXOP around a second station. Others system and method embodiments are disclosed.

Symmetric transmit opportunity (TXOP) truncation

A wireless local area network (WLAN) access point (AP) transmits a ready-to-send (RTS) frame. In response to the transmitted RTS frame and during a transmission opportunity (TXOP), a clear-to-send (CTS) frame from a first station is received. The WLAN AP further transmits at least one data frame in response to the received CTS frame and in response to the transmitted at least one data frame, an acknowledgement from the first station. The WLAN AP further transmits, in response to the received acknowledgement signal, a first medium access control (MAC) frame which is received by a second station, and the WLAN AP receives, in response to the transmitted first MAC frame and during the TXOP, a second MAC frame from the second station.

Disclosed herein are exemplary techniques for the communication of information in a wireless system by using multiple wireless channels. A direct link between two or more wireless devices may be established by performing a direct link setup between two or more wireless devices using an access point, where the direct link setup is conducted over a base channel and the direct link is established on a parallel channel. The two or more wireless devices may switch to the parallel channel and use the established direct link to communicate information directly without the access point as an intermediary. In anticipation of a predetermined event, such as the transmission of a delivery traffic indication map (DTIM) beacon frame by the access point, the two or more wireless devices may switch back to the base channel so that uplink, downlink and/or peer-to-peer information may be transmitted and/or received.

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Utrecht, Netherlands

Menzo Wentink