K.Muthumayil et al./ Elixir Adoc Network 46 (2012) 8494-8497 8494 Introduction Current research on MANETs focuses on source initiated on-demand routing protocols. These source initiated on demand routing protocols can be classified into many types like AODV, DSR, TORA, LAR and so on. Among these protocols LAR uses position information of the nodes to communicate. The use of position information used for location tracking and navigation. Global Positioning Systems (GPS) is the technique to determine its own position by using the Global Positioning System. Each node may have a location table to store the location information of other nodes. Based on location information in location table a sender can determine the location of the destination. Because of higher mobility of mobile devices in MANET’s communication performance will suffer if data are routed based on location information alone. Recent research has shown that ABR can be a good alternative to Location Aided Routing (LAR) in large MANET’s. By using associativity ticks of all the nodes, the path can be determined by the source, specifically associativity is measured by the nodes connectivity relationship with its neighbors changes as it is migrating and its transition period can be identified by associativity ticks or counts. Related work As many popular MANET On-Demand Routing[19] algorithms are available, we will present related work on link stability based routing protocol in this section. Link stability depends on the mobility of the nodes that are constituting the path from one to another node. A link is available when the radio quality of the link satisfies the minimal requirement for a successful transmission. Stability based protocols use stability or variations of stability as the routing metric. The implicit goal of most stability based routing protocols is to find and select the long(est)-lived routes. Associativity Based Routing (ABR) [12][13][14][15][16][17][18][20] is probably the first protocol in the class of stability based protocols for MANETs. In ABR, a new metric called associativity is defined to determine link stability. In simple terms, ABR is based on the idea that nodes which are neighbors for a threshold period are more likely to remain as neighbors for longer time, or less likely to move away. ABR assumes that after the threshold period, nodes move with similar speeds and directions and tend to stay together. One of the problem with ABR is the choice of the threshold value. This value may vary depending on the mobility patterns. Different types of mobility models that had been discussed in [1], like Random mobility models and Group based mobility models. In these previous work, they had discussed the comparison of various on-demand routing protocols on the various mobility models.In [5] [6], the AODV protocol is discussed on various mobility models and in [3] [9], DSR and DSDV were discussed on mobility models and the evaluations are given like measurement of efiiciency, packet delivery ratio, end-to-end delay and routing load and routing overhead. Random Waypoint model [4] [5] [6] and Reference Point Group Mobility model[1] [2] [7][8] [10] [11] were applied on the AODV, DSR, DSDV and etc., and evaluations are made by using performance parameters. In this simulation study, we have discussed the performance of Associativity Based Long-Lived Routing(ABR) protocol on Random Waypoint model, Reference Point Group Mobility model and Random Direction Mobility Model. Proposed work Associativity is determined by many factors such as residual battery life time, link stability, storage capacity, processing power and etc., In this paper we consider link stability to determine the associativity of the nodes. Link stability refers to Elixir Adoc Network 46 (2012) 8494-8497 Performance analysis of reference point group mobility model, random mobility models in associativity based Long-Lived Routing(ABR) Protocol K.Muthumayil 1 , V.Rajamani 2 , S.Manikandan 3 and M.Buvana 4 1,4 PSNA College of Engineering & Tech, Dindigul, Tamilnadu, India. 2 Indra Ganesan College of Engineering, Trichy, Tamilnadu, India. 3 R.M.D Engineering, College, Gummudipoondi, Chennai, Tamilnadu, India. ABSTRACT In MANETs, the Associativity Based Long-Lived Routing (ABR) protocol is an good alternative to the position-based and the location-aided routing protocols.In ABR, the associativity is determined by many factors such as residual battery life time, link stability, storage capacity, processing power and etc., In this paper we consider link stability to determine the associativity of the nodes. Link stability refers to how long any two nodes can communicate with each other. If a mobile host is in high mobility , there will be low stability. If there is low mobility, there will be high stability between any two nodes. Moblity causes frequent topology changes and can break the existing path. In this work, we use various mobility models like random waypoint(RWP) model, reference point group mobility(RPGM) and random direction mobility(RDM) models to study the performance of ABR protocol. These models capture the behaviors of ABR protocol in the simulator. The simulation results can show the performance of the ABR protocol varies based on the mobility models across different performance parameters. © 2012 Elixir All rights reserved. Adoc Network ARTICLE INFO Article history: Received: 31 March 2012; Received in revised form: 15 May 2012; Accepted: 25 May 2012; Keywords ABR, Link Stability, RWP,RPGM, RDM. Available online at www.elixirjournal.org Tele: E-mail addresses: muthumayil@yahoo.com © 2012 Elixir All rights reserved