Please note that Maccon and Macng are based on simple-mac in NS-2. The channel selection algorithm we are using is simple. Hence, collision exist in both these two MACs. But these simulation results prove that the functionality provided by CRCN is correct.

A.      Throughput comparison between contention based and collision free MAC under the same topology and traffic settings.

 

Maccon 3 channels.png

                                                           Figure 1. Contention based MAC

 

 

 

Macng 3 channels.png

Figure 2. Collision free MAC

B.   Throughput comparison between collision free MAC with 2 channels and 5 channels under the same topology and traffic settings.

 

 

 

Macng 2 channels random topo.png

Figure 3. Collision free MAC with 2 channels

 

 

 

Macng 5 channels random topo.png

Figure 4. Collision free MAC with 5 channels