Service function chaining deployed in an NFV environment: An availability modeling

Hybrid optimization algorithm for security aware cluster head selection process to aid hierarchical routing in wireless sensor network

“…Levels of security of the proposed GU-WOA with respect to the number of rounds is 33.86%, 42.38%, 31.69%, 17.89%, 27.93%, 16.36% and 14.98% better than ACI-GSO, GSO, ACO, PSO algorithms and algorithms proposed by Shankar, et al[39], Vinitha and Rukmini[50], and Sharma, et al[12] at the 80th round. Also, on observing it is clear that the Figure9(b), attains minimum communication cost, which is 19.57%, 30.02%, 39.12%, 36.46%, 35.82%, 18.45% and 13.44% better than ACI-GSO, GSO, ACO, PSO algorithms, and algorithms proposed by Shankar, et al[39], Vinitha and Rukmini[50],Sharma, et al …”

“…The packet delivery ratio (PDR) analysis of the adopted GU-WOA model over other existing models is depicted in Figure 7. From Figure 7(a), the adopted model for 50 nodes has acquired more PDR that is better than ACI-GSO, GSO, ACO, PSO, Shankar, et al [39], Vinitha and Rukmini [50], and Sharma, et al [12] at the 80th round 1.27%, 5.89%, 17.43%, 8.70%,3.53%, 1.18% and 1.01%. Besides, from Figure 7(b), the PDR of the implemented GU-WOA for 100 nodes is 9.04%, 2.13%, 6.25%, 8.02%, 2.21%, 11.99% and 0.20% better than ACI-GSO, GSO, ACO, PSO algorithms and algorithms by Shankar, et al [39], Vinitha and Rukmini [50], and Sharma, et al [12] in the 80th round.…”

“…The objective function of the adopted CH model is shown by Equation ( 10), in which the value of should rely on 0 < < 1. Here, v m and v n point out the operations as shown by Equations ( 11) and (12), correspondingly. The constraints on delay, energy, distance and security are specified by 1 , 2 , 3 and 4 .…”

“…Specifically from Figure 5(a), the adopted model for 50 nodes is 13.77%, 41.56%, 18.31%, 32.71%, 22.17%, 40.48% and 12.19% superior to ACI-GSO, GSO, ACO, PSO, Shankar, et al [39], Vinitha and Rukmini [50], and Sharma, et al [12] algorithms at 80th round with high energy. Likewise, from Figure 5(b), the suggested technique for 100 nodes at the 80th round is 49.72%, 79.54%, 65.26%, 70.72%, 21.050%, 32.41% and 47.11% superior to ACI-GSO, GSO, ACO, PSO, Shankar, et al [39], Vinitha and Rukmini [50], and Sharma, et al [12] algorithms. Therefore, the enhancements of the adopted GU-WOA for optimal CHS in WSN have been validated effectively.…”

“…Hence, the number of nodes deal with probably consists of thousands of nodes [9]. WSN owing to its features such as resource-restricted and infrastructure-less deployment nature it introduces several issues that might change the system performance [10][11][12][13]. The most challenging issues of WSN are energy efficiency, appropriate CH selection and secure data delivery.…”