Abstract

A MANET is a wireless network which operates by themselves without centralized administration. Each node in MANET operates as an end system and a router for all other nodes in the network. The primary challenge in building a MANET is equipping each device to continuously maintain the information required to properly route the traffic. Reactive routing protocols are favoured in MANET's because they generate fewer overheads in network. These protocols suffer due to network flooding in route discovery process. Expanding ring search in terms of early detection of destination cause quality of service to fluctuate randomly. Performance degradation due to quality of service is a bottleneck to fulfill stability and reliability in MANET's. In this paper, a scheme is introduced for controlling the broadcasting of RREQ information focusing on improved quality of service in AODV (Ad hoc on Demand Distance Vector) routing protocol. This is achieved by monitoring the TTL start, TTL increment and TTL threshold values of network and choosing optimum values of TTL suitable to network designed that accounts for reliability and quality of service during route discovery process. It is simulated using OPNET 14. 5 with fixed node density.

References

• Parulpreet Singh, Ekta Barkhodia and gurleen kaur walia," Evaluation of various Traffic loads in MANET with DSR routing protocol through use of OPNET Simulator" , IJDPS,Vol. 3 No. 3, pp 75-83, May 2012
• Huda Al Amri,Mehran Abolhasan and Tadeusz Wysocki," Scalability of MANET routing protocols for heterogeneous and homogeneous networks", Elsevier 2010
• Manijeh Keshtgary and Vahide Babaiyan," Performance Evaluation of Reactive, Proactive and Hybrid Routing Protocols in MANET", IJCSE , Vol. 4, pp 248-254, Feb 2012
• Purvi N. Raanuj and Hiteishi M. Diwanji," Enhanced Expanding Ring Search Algorithm for AODV", IJCA, Jan 2012
• Rupali Mahajan and Rupali Jagtap,"Energy Efficient Routing Protocols for Mobile Ad hoc Networks", IJISME, Vol. 1 Issue 3, pp 27- 31, Feb 2013
• B. Prasad , Dr. S. P. Setty," Analysing the Impact of TTL Sequence based Expanding Ring Search on Energy Aware Routing Protocols for MANETs", IJEST, Vol. 4 , pp 2197-2205, May 2012
• Anurag Porwal et al," Study and Design of New Reactive Routing Protocol Advance AODV for Mobile Adhoc Networks", IJERA, Vol. 2 Issue 3, pp 3195-3204 May- June 2012
• Michael Pan, Sheng- Yan Chuang and Sheng -De Wang, "Local Repair Mechanisms for On – Demand Routing in Mobile Ad hoc Networks"
• Kishan Singh Rao and Laxmi Shrivastav," Efficient Local Route Repair Method in AODV to Reduce Congestion in Manet",Corona Journal of Science and Technology, pp 35-38, Vol. 1 No. 1, Octuber 2012
• N. Javaid et al,"Modelling and Evaluating Enhancements in Expanding Ring Search Algorithm for Wireless Reactive Protocols", IEEE, April 2012
• Lei Guo, Yuhuai Peng, Xingwei Wang, Dingde Jiang and Yinpeng Yu, "Performance evaluation for on-demand routing protocols based on OPNET modules in Wireless Mesh Networks", Computers and Electrical Engineering ,pp 106-114,2011