Passive Duplicate Address Detection in DYMO Routing Protocol for MANETS

M ANET (M obile Ad Hoc Networks) is a wireless network in which all movable nodes can communicate with each other without depend on a fixed infrastructure. Here packet forwarding and routing is achieved by intermediate nodes. In reactive protocols, a routing path is acquired on-demand when a source desires to send data packets to destination. In order to send and receive packets between two nodes, they should have their unique address in the network. Since IP is also used in M ANETs, a unique IP address should be assigned to each node. Therefore, IP address autoconfiguration schemes have been developed to remove the overhead of manual configuration. M obility is one of the reasons for partitioning of the network. When a node having unique IP address in one partition, moves into another partition, there may arise a chance of duplication of the IP address. Since, IP address has to be unique, address conflicts need to be detected through a DAD (Duplicate Address Detection) procedure. This paper mainly focused on passive DAD schemes such as LOC-SD-INT (Location Source Destination with Intermediate nodes) over DYM O routing protocol. In this paper improved accuracy of detecting address conflicts, improved detection success ratio and reduced detection delay to detect address conflicts has been achieved. Through extensive simulations using the ns-2 simulator, PDAD schemes verified and better results are achieved when compared to the PACM AN scheme. By using PDAD schemes better throughput can be obtained and hence quality of service improved. In this paper, PDAD schemes achieved better detection efficiency compared to PACM AN schemes. The performance evaluations and results are analyzed and verified by using NS 2 (Network Simulator 2) simulator and compared with the results of existing method PACM AN (Passive Auto Configuration for M obile Ad Hoc Networks).