An Efficient DSR Protocol to Detect Blackhole Attacks in WMN Using Cross Layer Approach

摘要

Constructing an efficient and secured Wireless Mesh Network is a challenging issue due to its physical channel vulnerability and dynamic change of topology. In this network, attacks on network layer have vital significance since they may lead to disabling of larger scale network services. Secured Routing Protocol plays a major role in providing seamless network services. A Modified DSR protocol is proposed in this paper to overcome the blackhole attacks by detecting malicious nodes in the network. The proposed work computes the trust level of the path in the network layer by calculating the capability of the links. The link forwarding capability of the links is calculated at the link layer and node forwarding capability is calculated at network layer based on the behavior of the nodes. The nodes operate in the promiscuous mode to detect the misbehaving nodes. The performance of the modified DSR protocol is compared with DSR protocol and the simulation results show that the throughput and packet delivery ratio for the proposed work is better than DSR even in the presence of malicious nodes with minimal network overhead.