What Are The Impact Of Detecting Range On The Throughput Of MANET?

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Several studies of routing protocol based on the physical and MAC layers have been done in the literature. Jing Deng, et al. [1] and Kim et al. [2] argued that the carrier sensing range is a tunable parameter that can significantly affect the MAC performance in multihop ad hoc networks. Mustapha, et al. [3] investigated the impact of sensing range on the throughput of MANET by taking into consideration two essential issues in MAC they are concurrent transmission, which is referred to spatial reuse, and collision in terms of transmission range persistent probability and back-off time. Vaidya [4] investigated the impact of choosing an optimal carrier sense range by using an analytical model as well as simulation results. Their results…show more content…
In their approach, a node identified as blackhole node is blacklisted and an ALARM packet is sent so that the RREP packet originated from that malicious node is discarded and the routing table for that node is not updated. However, this algorithm suffers from excessive overhead due to the update of the threshold value at every time interval and the handling of special ALARM control packets. In [11], Tamilselvan et al. proposed a solution for preventing blackhole attacks in MANETs based on AODV protocol. In their solution, the source node waits till other replies with the next hop details. When the source node receives the RREP packets, it records the sequence number along with the time the packet arrived in a collect route reply table (CRRT). After recording the route replies in the CRRT, it calculates the timeout value for each RREP based on the time first RREP arrived, then it checks the CRRT for any repeated next hop nodes. The path with the repeated next hop node is considered to be safe. If there is no repeated next hope node in the CRRT, the algorithm chooses a random path from the CRRT. The main drawback of this solution is that if there are no repeated next hop nodes in the CRRT, therefore the algorithm increases the risk of blackhole attack by choosing a random path. In [12], Weerasinghe and Fu proposed a solution for prevention cooperative blackhole attacks in MANETs. In their solution, each node maintains a table called Data Routing Information (DRI), which

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