A cluster based detection and prevention mechanism against novel datagram chunk dropping attack in MANET multimedia transmission

All Denial of Service Attacks (DoS) is malignant. Their occurrence in the network affects the entire network performance. Dropping attack either Packet Dropping or Datagram Dropping is DoS in nature. Both these attacks occur corresponding to Transport layer of Mobile Ad hoc Network (MANET) stack which affects the entire functionality of transport layer. In this paper we have discussed a novel kind of Datagram Chunk Dropping Attack occurring in the MANET multimedia transmission. If multimedia transmission is datagram oriented, the datagram are transferred in the form of certain data streams called Chunks. In this attack an intermediate intruder node drops some data streams decreasing the throughput of the network in turn affecting the Quality of Service (QoS). Thus the detection and prevention of this attack becomes very crucial. The Datagram Chunk Dropping Attack detection and prevention technique i.e. Cluster Based Datagram Chunk Dropping Detection and Prevention Technique (CBDCDDPT) is proposed. The network performance parameter i.e. throughput shows considerable amount of improvement by the use of proposed technique.