Communication devices and methods

A first communication device configured to communicate with a second communication device and a third communication device, the first communication device comprising circuitry configured to

• receive a truncation notification during an ongoing exchange of data units with the second communication device, the truncation notification indicating that the ongoing transmission of a data unit shall be truncated and a preemptive data unit shall be received from and/or transmitted to the third communication device,
• transmit an end notification indicating an end of a current transmit opportunity before the end of the current transmit opportunity, and
• establish a new transmit opportunity with the third communication device, wherein a duration of said new transmit opportunity covers at least the transmission of the preemptive data to and/or the reception of the preemptive data from the third communication device,
• wherein the notification is received on a different link than the one on which the ongoing data exchange between the first and second communication device is performed.

A third communication device configured to communicate with a first communication device, the third communication device comprising circuitry configured to

• receive a data unit addressed to a second communication device,
• determine a duration indication indicating an expected duration of an ongoing transmission of a data unit and/or of an ongoing transmit opportunity,
• determine if transmission of a data unit has been terminated before an estimated transmission time of the data unit,
• reset a network allocation vector (NAV) upon determining that the transmission of the data unit has been terminated before the estimated transmission time of the data unit, and
• receive from and/or transmit to the first communication device a preemptive data unit within a remaining duration of the truncated data unit and/or within the remaining duration of the transmit opportunity.

A first communication method for communicating with a second communication device and a third communication device, the first communication method comprising:

• receiving a truncation notification during an ongoing exchange of data units with the second communication device, the truncation notification indicating that ongoing transmission of a data unit shall be truncated and a preemptive data unit shall be received from and/or transmitted to the third communication device,
• terminating the ongoing transmission of the data unit before an estimated transmission time of the data unit, and
• receiving from and/or transmitting to the third communication device the preemptive data unit within a remaining duration of the truncated data unit or within a remaining duration of the transmit opportunity, established between the first and the second communication devices for the ongoing data unit exchange,
• wherein the notification is received on a different link than the one on which the ongoing data exchange between the first and second communication device is performed.

The first communication method for communicating with a second communication device and a third communication device, the first communication method comprising:

• receiving a truncation notification during an ongoing exchange of data units with the second communication device, the truncation notification indicating that ongoing transmission of a data unit shall be truncated and a preemptive data unit shall be received from and/or transmitted to the third communication device,
• transmitting an end notification indicating an end of a current transmit opportunity before the end of the current transmit opportunity, and
• establishing a new transmit opportunity with the third communication device, wherein a duration of said new transmit opportunity covers at least the transmission of the preemptive data to and/or the reception of the preemptive data from the third communication device,
• wherein the notification is received on a different link than the one on which the ongoing data exchange between the first and second communication device is performed.

A third communication method for communicating with a first communication device, the third communication device comprising:

• receiving a data unit addressed to a second communication device,
• determining a duration indication indicating an expected duration of an ongoing transmission of a data unit and/or of an ongoing transmit opportunity,
• determining if transmission of a data unit has been terminated before an estimated transmission time of the data unit,
• resetting a network allocation vector (NAV) upon determining that the transmission of the data unit has been terminated before the estimated transmission time of the data unit, and
• receiving from and/or transmitting to the first communication device a preemptive data unit within a remaining duration of the truncated data unit and/or within a remaining duration of the transmit opportunity.