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Vol. 22, Special Issue, June 2013, pp. 97-103




A Reputation-based Mechanism to Stimulate Cooperation in Wireless Sensor Networks
1, 2 Li Fengyun, 2 Gao Fuxiang, 2 Yao Lan, and 2 Li Peng

1 Computing Center, Northeastern University, Shenyang 110819, P. R. China

 2 School of Information Science and Engineering, Northeastern University, Shenyang 110819, P. R. China

E-mail: lifengyun@cc.neu.edu.cn, gaofuxiang@ise.neu.edu.cn


Received: 15 April 2013   /Accepted: 20 June 2013   /Published: 28 June 2013

Digital Sensors and Sensor Sysstems


Abstract: In wireless sensor networks, the sensor nodes need to collaborate with each other to transmit packets to the destination. However, some malicious nodes are not cooperative. The paper introduces a new reputation-based mechanism to stimulate nodes to forward packets for other nodes and enforce the security of the networks. All nodes are encouraged to maintain a good reputation so that their packets can be forwarded by other nodes, and a node will be isolated and punished if it acts maliciously. The impact of collisions and interference on nodes' reputation is reduced, and nodes can have chance to restore cooperation after being mistaken for the selfish ones. The low competitive nodes that do not have enough energy to help other nodes can also be treated well. While searching a route to the destination, the factors of reputation, remaining energy and the distance to the destination are taken into consideration. Simulation results show that our strategy can achieve relatively high throughput even when there are malicious nodes in the networks.


Keywords: Wireless sensor networks, Reputation mechanism, Cooperation, Collision, Security.


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