Improved Ad-Hoc Network Using Ant based Protocol and Threshold Signal

Ad-hoc networks are known for various specifications like dynamic in nature, multi-hop transmission, frequently changing network topology. To maintain above features, an efficient routing protocol needed, which can satisfied Ad- hoc network specifications. In this paper, issue related to weak signal strength of nodes moving away from covering area. So in this proposed algorithm, signal strength is incorporating into route metrics. The proposed algorithm is compared with AODV and ANT routing protocols. The Antnet algorithm [1] without using signal strength criteria, has been found yield throughput of 2.05 MBPS, whereas proposed algorithm results throughput of 2.2 MBPS which is improved by around 7%. The packet delivery fraction ratio obtained in the proposed method is 0.92 as compared to Mohammed Bouhorma etal [2] which is 0.8, therefore ratio improved by 15%. The delay in AODV is 0.57sec, in ANT based routing protocol is 0.46 whereas proposed ANT have delay of .40 sec, with improvement of 13% from ANT and 29.82% from AODV. All above said routing algorithms are simulated in to NS2 and their performance is calculated on basis of three parameters and which are End to End Delay, Throughput of system and Packet Delivery Fraction (PDF). By simulation we concluded that the improved ANT or proposed algorithm produced better results all in three routing algorithms.