Dynamic Data Flow Management in Mobile Adhoc Network

Abstract

The Modern world is fully occupied by Wireless communication which leads to research in the field of Mobile Ad hoc network (MANET). Because of the high adaptability, low establishment and maintenance cost, MANET is preferred over other networks. MANET is a network created by a collection of mobile nodes communicating using wireless link via intermediate nodes which agree to route messaging with each other. MANET have issues like restricted bandwidth, constrained resources, varying topology, wireless link, inadequate resources and a decentralised approach. Data loss is a major issue faced by MANET. Data loss occurs due to congestion, link failure, traffic, attacks like denial of service and coverage problem. Data loss adversely degrades the performance of the wireless network to a great extent. This entire work focuses on the causes of degradation of network performance due to data loss on a particular category of wireless network called adhoc wireless network. Major contributions of this research are the Transmission and Reception Rate based Ad hoc On-demand Distance Vector (TRR-AODV), cooperative communication and Secure routing Ad hoc On-demand Distance Vector (SRAODV) . newlineTRR-AODV avoids data loss due to congestion by selecting a routing path based on the transmission and receiving rate of the intermediate nodes. SRAODV solves data loss problem due to denial of service attacks. In SRAODV the average communication time between the source and destination to transmit a packet is calculated using heartbeat timer and a threshold value is fixed. The acknowledgment node id is checked if the communication time is greater or lower than the fixed allowable limit. In Cooperative communication, data loss due to coverage problem is focused. When a receiving node moves out of the coverage area, in order to maintain the continuity the remaining data packets are transmitted by considering the neighbor node as a carrier node. This avoids the disconnection of data transmitted and the request for new route to resume the data transmission. The proposed solutions were simulated and tested. The simulation results of the proposed system give an improved routing performance such as Packet Delivery Ratio, end to end delay, and throughput. newline newline newline newline newline newline newline newline