Delay Tolerant Network (DTN) supports the concepts of uni-casting and multicasting both but the multicasting approach is better and advanced than the unicasting approach while group communication needed. The network is dynamic and the sender first creates the bundle of same messages for different destination nodes in network. Multicast senders should be aware of their multicast recipients ahead of time. In ad hoc based delay tolerant (DTN) communication whiles multiple node use bundle-based communication which increases the network congestion so in proposed approach fuzzy logic concept is helpful for detecting the congestion in network. The congestion status information actually shows the status of network. In fuzzy logic approach measures the channel capacity, buffer space and delay and decides the level of congestion i.e. acceptable or not. The status of congestion divided into more than one level or set the different threshold for different level of congestion. When transferring data in a DTN, it is standard practice to utilize a store and forward technique. In addition, a node can store and transfer data from its own buffer, and this data can be sent to other nodes as they become available. A network node can register itself with any receiver group by specifying the destination for the group to which it wishes to be registered. These researches demonstrate that upgrading the group communication mechanism of the ODMRP protocol may significantly improve the routing performance of the protocol. In this technique, the number of participants for group communication in the DTN network is taken into consideration. The proposed NCDP performance is compared to the performance of the CASPeR. The proposed protocol's performance increases the storing and forwarding capabilities of mobile nodes, as well as the capacity to communicate in a bundled manner to many destinations. The simulation results demonstrate that the performance of the proposed multicast routing scheme is assessed using performance measures such as latency, overhead, and throughput, among others. ...
Authors: Deepak Singh Tomar, Dr. Megha Kamble.