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.
Throughput comparison between contention based and collision free
Figure 1. Contention based
2. Collision free
Throughput comparison between collision free
3. Collision free
4. Collision free