Abstract
Due to the unguaranteed connectivity, wireless sensor networks based on delay tolerant network (DTN) are typically characterized by the opportunistic forwarding mechanism in transmission. Such a mechanism requires nodes to participate in forwarding messages actively. However, when the mechanism is used in the real world, selfish nodes will exhibit some non-cooperation behaviors. Therefore, some incentive mechanism may be designed to encourage selfish nodes. In order to solve the selfishness problem, we propose a fair credit-based incentive mechanism for routing in DTN-based sensor networks. In this mechanism, when a source node sends messages to its destination, each relay node will be rewarded with some credits. The accumulated credits are then used to evaluate the level of cooperation in the network. The selfish nodes with few credits are not able to get enough service from other nodes. With the fair incentive, all participating relays will get equal rewards by the trusted third party. In order to evaluate the proposed mechanism, we also perform some simulation, and the results demonstrate that the method can be used to support efficient routing for DTN-based sensor networks.
Highlights
As a kind of wireless technology, wireless sensor networks (WSNs) are systems that comprise large numbers of wirelessly connected heterogeneous sensor nodes that are spatially distributed across a large field of interest [1]
We propose a new incentive mechanism called Fair credit-based incentive mechanism (FCIM) for delay tolerant network (DTN)-based sensor networks with selfish nodes
6 Conclusion This study presents a fair credit-based incentive mechanism called FCIM for DTN-based sensor networks by optimizing the activity of selfish nodes
Summary
As a kind of wireless technology, wireless sensor networks (WSNs) are systems that comprise large numbers (usually hundreds or thousands) of wirelessly connected heterogeneous sensor nodes that are spatially distributed across a large field of interest [1]. We design an incentive mechanism based on credit rewarding to achieve more efficient performance in DTN-based sensor networks under the constraint of nodes’ selfishness. In [26], Zhu et al propose a credit-based incentive scheme called SMART and consider that there exist selfish and malicious nodes in DTN. Rolla and Curado describe a new credit-based mechanism for DTN, which uses a utility function to denote the monetary value and a buffer management algorithm to prevent the selfish behavior of nodes [28].
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