wChain A Fast Fault-Tolerant Blockchain Protocol for Multihop Wireless Networks
ABSTARCT :
This paper presents wChain, a blockchain protocol specifically designed for multihop wireless networks that deeply integrates wireless communication properties and blockchain technologies under the realistic SINR model. We adopt a hierarchical spanner as the communication backbone to address medium contention and achieve fast data aggregation within O(logNlog ?) slots where N is the network size and ? refers to the ratio of the maximum distance to the minimum distance between any two nodes. Besides, wChain employs data aggregation and reaggregation as well as node recovery mechanisms to ensure efficiency, fault tolerance, persistence, and liveness. The worst-case runtime of wChain is upper bounded by O(flogNlog ?), where f=?N/2? is the upper bound of the number of faulty nodes. To validate our design, we conduct both theoretical analysis and simulation studies. The results not only demonstrate the nice properties of wChain, but also point to a large new space for the exploration of blockchain protocols in wireless networks.
EXISTING SYSTEM :
? The existing scheme of incentive mechanisms such as the vehicle’s reputation-based and payment-based generally use a central trusted authority.
? While many fundamental ideas existed about twenty to thirty years ago, recent years we see tremendous research activity in wireless ad hoc networks due to its applications in various situations such as battlefield, emergency relief, and so on.
? There exist several works that focus on the study of blockchain in vehicular networks.
? Besides improving the performance of other system metrics and implementing a vehicle authentication mechanism, we also consider integrating artificial intelligence (e.g., deep learning) into the blockchain platform in the VECNets framework.
DISADVANTAGE :
? Transforming fault-tolerant or Byzantine faulttolerant protocols used in wired networks to wireless environments remains a tricky problem.
? The popularity of 5G and IoT has arisen more security and privacy issues relevant to identity management, data sharing, and distributed computing in wireless networks.
? Most existing studies on consensus and leader election for wireless networks assume a high-level wireless network abstraction or a realistic model grappling with issues in physical and link layers.
? We perform four experiments to explore how the SINR model parameters, namely a and ß, impact the performance of wChain.
PROPOSED SYSTEM :
• An incentive mechanism is proposed to motivate vehicles to contribute honestly and share their data to maintain and improve system reliability.
• We conduct the simulation to show that our proposed architecture increases the vehicular network’s general parameter performance.
• The authors of proposed DREAMS, an efficient distributed reputation management in VECNets.
• We define the entities used in this paper, describe the design architecture in each layer, and give each step’s detailed procedures in the proposed system.
• We conduct the simulation to implement our proposed architecture based on the performance parameters of vehicular networks.
ADVANTAGE :
? The wChain protocol ensures high performance by employing a spanner as the communication backbone.
? On the other hand, it is harder to balance performance and security in blockchain since consensus and leader elections offer more straightforward services without requiring a strong security guarantee.
? We perform four experiments to explore how the SINR model parameters, namely a and ß, impact the performance of wChain.
? Traditional protocols commonly used on the Internet are not efficient enough in wireless networks.
? One needs a blockchain protocol that can take into consideration the unique features of wireless networking by deeply integrating wireless communications with blockchain to achieve the necessary properties of efficiency, fault-tolerance, persistence, and liveness.
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