Spectrum Handoff Aware AODV Routing Protocol for Cognitive Radio Vehicular Ad Hoc Networks

Figure 5

Cognitive TCP performance evaluation with respect to spectrum handoff. (a) CR-TCP congestion window variation with varied simulation time. (b) End-to-end TCP throughput with respect to simulation time. (c) Spectrum handoff local channel-route discovery with respect to no. of CR nodes. (d) Spectrum handoff local channel-route discovery with respect to the PU transmitters. (e) Spectrum handover packet drop probability with respect to no. of PU transmitters. (f) Average end-to-end CR-TCP throughput with respect to no. of PU transmitters.

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