The Experts below are selected from a list of 27627 Experts worldwide ranked by ideXlab platform
Paul Rimba - One of the best experts on this subject based on the ideXlab platform.
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Proof-of-QoS: QoS based blockchain Consensus Protocol
Computers & Security, 2019Co-Authors: Joseph K. Liu, Surya Nepal, Paul RimbaAbstract:Abstract The Consensus Protocol is the foundation of all blockchain systems. Existing Consensus Protocols like Proof-of-Work (PoW) consume a vast amount of energy. However, they are severely limited to transaction throughput. Consensus Protocols like Proof-of-Stake (PoS) have been proposed to address this challenge. However, these Protocols have compromised the fairness by discouraging the “poorer” participants and allowing “richest” stakeholders to have full control over the generation of blocks. Towards meeting these conflicting requirements on throughput and fairness, we propose a blockchain Consensus Protocol based on the Quality-of-Service (QoS). In our Proof-of-QoS (PoQ) Protocol, the entire network is divided into small regions. Each region nominates a node based on its QoS. A deterministic Byzantine Fault Tolerance (BFT) Consensus is then run among all nominated nodes. PoQ aims to achieve a very high transaction throughput as a permissionless Protocol and provides a fairer environment for participants. Our experimental results show that PoQ can achieve 9.7K transactions per second (TPS) for a network of 12 regions.
Wei Peng - One of the best experts on this subject based on the ideXlab platform.
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proof of reputation a reputation based Consensus Protocol for peer to peer network
Database Systems for Advanced Applications, 2018Co-Authors: Fangyu Gai, Baosheng Wang, Wenping Deng, Wei PengAbstract:The advent of blockchain sheds light on addressing trust issues of peer-to-peer networks by providing a distributed tamper-resistant ledger. Beyond cryptocurrencies, it is believed that blockchain can also be used to protect other properties such as reputation. Most of the existing studies of enhancing reputation systems using blockchains are built on top of the bitcoin-like blockchains, so they are inherently constrained by the low-efficiency and high-consumption of the underlying blockchain. To fill this gap, we present a reputation-based Consensus Protocol called Proof of Reputation (PoR), which guarantees the reliability and integrity of transaction outcomes in an efficient way. In PoR, we let reputation serves as the incentive for both good behavior and block publication instead of digital coins, therefore no miners are needed. We also implement a prototype and our scalability experiments show that our Protocol can scale to over a thousand participants in a peer-to-peer network with throughput of hundreds of transactions per second.
Peter Wall - One of the best experts on this subject based on the ideXlab platform.
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an affine arithmetic based Consensus Protocol for smart grid computing in the presence of data uncertainties
IEEE Transactions on Industrial Electronics, 2015Co-Authors: Vincenzo Loia, Vladimir Terzija, Alfredo Vaccaro, Peter WallAbstract:The recent advances in cooperative and bio-inspired computing based on self-organizing sensor networks have been recognized as a very promising enabling technology for future smart grids (SGs). Although many papers outline the important role of these paradigms in decentralized SG monitoring and control, they do not explicitly consider the effect of the uncertainties that characterize the actual power system environment. The effects of these uncertainties could compromise the convergence of Consensus-based algorithms in the form of unwanted changes in the convergence time, increasing the convergence errors and compromising the repeatability of the convergence. To address this problem, this paper proposes a new Consensus Protocol based on the use of affine arithmetic. The application of this reliable Consensus Protocol to decentralized SG computing is explained in detail. Furthermore, several numerical results are presented and discussed to demonstrate the effectiveness of the proposed methodology.
Jun Xie - One of the best experts on this subject based on the ideXlab platform.
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A Distributed Control Strategy for Frequency Regulation in Smart Grids Based on the Consensus Protocol
Energies, 2015Co-Authors: Hailong Wang, Jun XieAbstract:This paper considers the problem of distributed frequency regulation based on the Consensus control Protocol in smart grids. In this problem, each system component is coordinated to collectively provide active power for the provision of ancillary frequency regulation service. Firstly, an approximate model is proposed for the frequency dynamic process. A distributed control algorithm is investigated, while each agent exchanges information with neighboring agents and performs behaviors based on communication interactions. The objective of each agent is to converge to a common state considering different dynamic load characteristics, and distributed frequency control strategy is developed to enable the agents to provide active power support. Then, the distributed proportional integral controllers with the state feedback are designed considering the Consensus Protocol with topology . The theory of distributed Consensus Protocol isfurther developed to prove the stability of the proposed control algorithm. Whenproperly controlled, the controllers can provide grid support services in a distributed manner that turn out the grid balanced globally. Finally, simulations of the proposed distributed control algorithm are tested to validate the availability of the proposed approach and the performance in the electrical networks
Joseph K. Liu - One of the best experts on this subject based on the ideXlab platform.
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Proof-of-QoS: QoS based blockchain Consensus Protocol
Computers & Security, 2019Co-Authors: Joseph K. Liu, Surya Nepal, Paul RimbaAbstract:Abstract The Consensus Protocol is the foundation of all blockchain systems. Existing Consensus Protocols like Proof-of-Work (PoW) consume a vast amount of energy. However, they are severely limited to transaction throughput. Consensus Protocols like Proof-of-Stake (PoS) have been proposed to address this challenge. However, these Protocols have compromised the fairness by discouraging the “poorer” participants and allowing “richest” stakeholders to have full control over the generation of blocks. Towards meeting these conflicting requirements on throughput and fairness, we propose a blockchain Consensus Protocol based on the Quality-of-Service (QoS). In our Proof-of-QoS (PoQ) Protocol, the entire network is divided into small regions. Each region nominates a node based on its QoS. A deterministic Byzantine Fault Tolerance (BFT) Consensus is then run among all nominated nodes. PoQ aims to achieve a very high transaction throughput as a permissionless Protocol and provides a fairer environment for participants. Our experimental results show that PoQ can achieve 9.7K transactions per second (TPS) for a network of 12 regions.