Abstract
In wireless sensor networks, due to the energy and resource constraints, nodes may be unwilling to forward packets for their neighbors. This can render severe deteriorations in the network performance and malfunctions of the system. To tackle such selfish behaviors and enhance the cooperation among sensors, based on reputation and energy consumption of each node, we present a utility function to punish the malicious nodes and encourage cooperation among nodes. Specifically, we firstly give a mixed strategy Nash equilibrium solution for the two nodes. Then we extend the model to multi-nodes scenario. With the unity function, each sensor’s reputation is evaluated according to its degree of cooperation. The extensive simulation results have shown the effectiveness of the mechanism, in that the cooperative behaviors are encouraged, which can ensure the normal functioning of the network system.
Highlights
Wireless sensor networks (WSNs) have recently penetrated deeply into our society and drawn considerable attentions from the academia and industry
This can render severe deteriorations in the network performance and malfunctions of the system. To tackle such selfish behaviors and enhance the cooperation among sensors, based on reputation and energy consumption of each node, we present a utility function to punish the malicious nodes and encourage cooperation among nodes
To conserve limited energy, some selfish nodes may be unwilling to forward data for their neighboring nodes, which can cause the decrease in network throughput and the severe deterioration in system performance
Summary
Wireless sensor networks (WSNs) have recently penetrated deeply into our society and drawn considerable attentions from the academia and industry. WSNs are composed of a large number of cheap and tiny senor nodes deployed in monitored areas. As a novel technology in acquiring and processing information, WSN has been widely applied in many fields, such as military affairs, industry, agriculture, health care, and environmental monitoring, etc. In the deployment of WSN, one of the key concerns is the limited energy constraint, which has restricted the capabilities of sensor nodes in data communication, computing, and information processing. To conserve limited energy, some selfish nodes may be unwilling to forward data for their neighboring nodes, which can cause the decrease in network throughput and the severe deterioration in system performance.
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