In multihop wireless networks, when a mobile node wants to communicate with a destination, it relies on the other nodes to forward the packets. This multihop packet transmission can extend the network coverage area using limited power and improve area distance efficiency. In the proposed multihop wireless network E-STAR integrates the payment and trust systems with the routing protocol with the goal of enhancing route reliability and stability. The payment system describes to charge the nodes that send packets and reward those forwarding packets. The trust system is important to evaluate the nodes’ trustworthiness and reliability in forwarding packets in terms of multi-dimensional trust values and the trust values are calculated for each node and developed two routing protocol is used to send the packets through highly trusted nodes having sufficient energy to minimize the possibility of breaking the route. To strengthen the trust evaluation, recommendation from each node is included in trust calculation by TP (Trusted Party). This protocol is implemented over the MANET network and simulated using NS2. Performance evaluated from the parameters such as packet delivery ratio, call acceptance ratio and route lifetime.
 S. Marti, T. Giuli, K. Lai, and M. Baker, “Mitigating routing misbehavior in mobile ad hoc networks”, in Proc. IEEE/AC, pp. 255–265, August 6-11, 2000.  M. Mahmoud and X. Shen, “ESIP: Secure incentive protocol with limited use Of public-key cryptography for multi-hop wireless networks”, IEEE Transactions On Mobile Computing, vol. 10, no. 7, pp. 997-1010, July 2011.  P. Velloso, R. Laufer, D. Cunha, O. Duarte, and G. Pujolle, “Trust management in mobile ad hoc networks using a scalable maturity-basedmodel”,IEEE Transactions on Network and Service Management, vol. 7, no. 3, pp.172–185, September 2010.  Shilpa S G , Mrs. N.R. Sunitha, B.B. Amberker, “A Trust Model for Secure and QoS Routing in MANET”, International Journal of Innovative Technology & Creative Engineering (ISSN: 20458711), vol.1no.5 may 2011.  M. Mahmoud and X. Shen, “PIS: A practical incentive system for multi-hop wireless networks”, IEEE Transactions on Vehicular Technology, vol. 59, no.8, pp. 4012-4025, 2010.  N. Bhalaji and A. Shanmugam, “Reliable routing against selective packet drop attack in DSR based MANET”, Journal of Software, vol. 4, no. 6, pp. 536-543, August 2009.  J.Gunasekaran, M.Ezhilvendan, P.Vijayanand, S.Rajasekaran, S.Murugesan “Report Based Payment Scheme for Multihop Wireless Networks”. ISSN: 2319 – 1163 vol. 2, Issue. 4, pp. 459 – 464, APR 2013.
Securing heterogeneous multihop wireless networks, packet dropping , trust systems, and secure routing protocols