On reception of a corrupted frame, only the virtual fragments in error are retransmitted.
Finally, the last task is to apply the predefined set of weights during transmission or reception of a training frame: this procedure is denoted as weight setting.
Both link directions are considered, since successful frame transmission requires the reception of an ACK frame in many link layer protocols, as in 802.11 CSMA/CA.
After a loss in the arbitration process or the reception of an error frame, the sender automatically performs a retransmission of the corresponding communication object.
For successful reception of each frame in a superframe, a BANCO can broadcast its acknowledgement (ACK) packet only in the beacon frame of the next superframe.
The transmission is not considered successful until the successful reception of complete frame.
Accordingly, upon reception of the frame, collisions can be post-detected as explained in the following paragraph.
The first one is D S, the average time delay from the transmission of the CCTS frame to the successful reception of the ACK frame, and the second one is D E, the average time delay from the transmission of the CCTS frame to transmission failure with the CCTS, RTH, CTS, DATA, or ACK frame.
In response to the RAK frame, the first recipient transmits its ACK frame, on which its uplink data frame can be piggybacked, an SIFS (Short Inter-Frame Space) period after the reception of the RAK frame.
The average time delays from the transmission of the CCTS frame to the successful reception of the ACK frame for direct and cooperative transmission, respectively, correspond to begin{array}rcl@ D_{S1} &=& D_{S}^{1} + D_{E}^{2} + D_{S}^{7} + D_{S}^{6}~~~~~~~~~~~~~~~~~~~~~~ end{array} (17).
