On the contrary, the delivery ratio of ED router decreases when everyone in the network is forwarding messages (Figure 2), because a large amount of messages stored by all nodes is dropped, as buffer constraint is a pivotal factor of this routing performance.
We find that exploring local users’ mobility patterns, D2D2C infrastructure gives a better message delivery performance (µ = 31.69, σ = 5.05) than storing data into hubs (µ = 14.29, σ = 2.23).
But as expected, in the baseline EF, the message delivery performance is higher (µ = 61.26, σ = 6.22); a two-way analysis of variance (ANOVA) shows significant differences in the overall rate of the message delivery ratio [F (2,891) = 0.00, p < 0.05].