The Scientific World Journal / 2014 / Article / Fig 5

Research Article

Design and Performance Evaluation of a Distributed OFDMA-Based MAC Protocol for MANETs

Figure 5

An LET4 takes place because local information cannot reflect the network state completely.
(a) At time , multiple RTS frames are sent simultaneously. The RTS frames sent by and collide at
(b) At time , multiple CTS frames are sent to confirm reservation
(c) At time , the data transmission from to fails because it collides with the data transmission from to