scholarly journals Performance Analysis of CAT Swarm Optimization Algorithm in Disruption Tolerant Networks

2021 ◽  
Vol 9 ◽  
Author(s):  
Sangeetha R ◽  
◽  
Dr.R. Vijayabhasker ◽  

Disruption tolerant networks (DTN) are networks that provide unguided technologies. Solar technologies and Radio frequencies are used to operate the network. In DTN networks the connectivity does not last for a long time and they do not provide end to end connectivity. Therefore it uses store and forward technique to forward the packets to the destination nodes. When N number of nodes is participating in the network, each node receives packets from the previous node and sends acknowledgment to the sender node. Time delay occurs on receiving and sending acknowledgment continuously. Collision occurs due to the congestion in the network. Due to the irregular connectivity in the network, the compromised nodes try to drop the whole packet or part of the packet. The Blackhole and Greyhole attacks occur due to the packet loss. Optimized algorithm can be used to solve the above attacks. By using CAT Swarm optimization algorithm, the attacks can be prevented and it minimizes the Time delay in delivering the packets.


2013 ◽  
Vol 846-847 ◽  
pp. 795-798
Author(s):  
Jiao Meng ◽  
Qi Hua Xu ◽  
Xiao Xiao

Improving network control system---NCS reliability and safety has important practical significance because NCS is a hot research subject in these years. Fault diagnosis methods are researched in this paper according to NCS with long-time delay and data packet loss. Firstly, given a NCS with long-time delay, a state observer is structured. Secondly, make the state estimation error equation equivalent to an asynchronous dynamical system having event incidence constraint according to whether the system having data packets loss. The problem of fault diagnosis is converted to filtering problem through structuring filtering residual system based on the observer, then giving a corresponding filter designing algorithm. The designed fault diagnosis filter system not only make sure the stability of the closed loop system but also make the residual systems norm less than given reduction level. Finally, the simulation results prove that the algorithm can diagnose faults effectively.





Author(s):  
Hugo Siqueira ◽  
Elliackin Figueiredo ◽  
Mariana Macedo ◽  
Clodomir J. Santana ◽  
Carmelo J. A. Bastos-Filho ◽  
...  




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