ii) Influence of NAV
Figure 5 shows an example of a transmission failure due to NAV. In Fig. 5, when Node 11 sets NAV because of the transmission of Node 12, Node 11 cannot receive frames from Node 10 during NAV period. As shown in the previous section, the period during which both transmissions may overlap due to the NAV between Node 10 and Node 11 is also {1 . (x + y)}. Transmission failures due to the NAV between Node 10 and Node 11 occur when Node 10 starts to transmit an RTS frame after finishing the RTS transmission of Node 12. The transmission failure probability is bx+y. Therefore,