Blockchain technology is a decentralized data storage method. The application of blockchain technology to virtual power plants will have an important impact on its operation mode. This paper first expounds the blockchain technology and analyzes the applicability of its combination with virtual power plants. On this basis, it designs the virtual power plant transaction and management framework based on blockchain technology, and establishes the power transaction mode of virtual power plants based on blockchain technology. Finally, on the Ethereum platform, the simulation test is carried out. The results show that the virtual power plant transaction mode based on blockchain technology, combined with the continuous double auction mechanism, can realize the peer-to-peer transaction of distributed resources and loads within the virtual power plant, promote the local elimination of distributed energy source, and reduce the cost of power transaction and energy loss.
Bin Cao, Xuesong Wang, Weizheng Zhang, Houbing Song · 5 authors
The Industrial Internet of Things (IIoT) has developed rapidly in recent years. Private blockchains with decentralization, flexible rules, and good privacy protection can be applied in the IIoT to process the massive data and tackle the security problem. However, the scalability of blockchain places a restriction on IIoT. Accordingly, this article proposes an improved algorithm based on Two_Arch2 to improve the scalability and decentralization while reducing the latency and cost of the blockchain. By integrating the private blockchain theory to IIoT and simultaneously considering the above four objectives, a many-objective blockchain-enabled IIoT model is constructed. Then an improved Two_Arch2 algorithm is utilized to solve the model. Experimental results show that the improved algorithm can effectively optimize four indicators of the model.
Blockchain is regarded as one of the most promising technologies to upgrade e-commerce. This article analyzes the challenges that current e-commerce is facing and introduces a new scenario of e-commerce enabled by blockchain. A framework is proposed for mining tasks in this scenario offloaded onto edge servers based on mobile edge computing. Then, the offloading issue is modeled as a multi-constrained optimization problem, and evolutionary algorithms are utilized and re-designed as solvers. The experimental results validate the efficiency of the framework and algorithms and also show that the lower bound of computation resources exists to obtain the maximum overall revenue.
Improving transaction throughput is an important challenge for Bitcoin. However, shortening the block generation interval or increasing the block size to improve throughput makes it sharing blocks within the network slower and increases the number of orphan blocks. Consequently, the security of the blockchain is sacrificed. To mitigate this, it is necessary to reduce the block propagation delay. Because of the contribution of new Bitcoin protocols and evolution of the Internet, the block propagation delay in the Bitcoin network has been shortened in recent years. In this study, we measure the block propagation delay on the Bitcoin network using a simulator, and investigate the effect of compact block relay---an up-to-date Bitcoin protocol---and Internet improvements from 2015 to 2019. The experimental results reveal that the block propagation delay is reduced by 64.5% for the 50th percentile and 63.7% for the 90th percentile due to Internet improvements, and by 90.1% for the 90th percentile and by 87.6% for the 90th percentile due to compact block relay.
Vel S Rathina, B. Rebekka, N. Gunavathi, B. Malarkodi
Traditionally for providing communication service in the new region, Communication Service Providers (CSP) have to deploy new hardware appliances like Evolved Packet Core (EPC), Home Location Register (HLR) etc. This results in huge capital expenses (CAPEX) and operational expenses (OPEX) for telecom providers. So in order to reduce hardware costs, generic hardware with high capacity storage, memory and compute power can be virtualized to multiple virtual network functions (VNF) which will perform functions like routing, switching etc. This virtualization concept is called Network Function Virtualization (NFV). As NFV based telecom service involves different operators, it requires Multi-domain Orchestration (Md-O). To overcome trust issues, management of NFV entities needs to be done in a distributed manner by involving all organizations, who involved in NFV environment. As blockchain technology is distributed ledger technology, blockchain based decentralized applications seem to be effective in managing NFV entities. In this paper schema for managing multi-domain orchestrated NFV entities using blockchain was proposed. For performing identity management of NFV entities, Proof of Concept blockchain was proposed with Hyperledger Indy. Also for performing life cycle management of VNFs, blockchain was designed with Hyperledger fabric.
K. Rajeswari Amrita B. Chavan Amrita B. Chavan, TJPRC
a showcase of ethereum Dapps, where the encryption keys are prolonged and open just to the end client. The client can also share the reports safely with various clients that they pick. Also the ID document will be stored in the hash format. The solidity smart contracts help to make tamper-proof records. It provides animmutability.
Dec 21, 2018·Proceedings of the Asia-Pacific Conference on Intelligent Medical 2018 & International Conference on Transportation and Traffic Engineering 2018
As a new decentralized infrastructure, blockchain has received attention and research in various fields. The decentralization, openness, autonomy and anonymity of the blockchain are of great significance to the development of the shipping industry. This paper outlines the characteristics and key technologies of the blockchain and introduces the infrastructure model of the blockchain. Combined with the characteristics of blockchain and shipping industry, this paper expounds the application status of blockchain in the shipping industry, analyzes the application prospects of the shipping industry to exploit the advantages of blockchain, and proposes the application barriers in the process of integration. This presents the development path of the blockchain in the shipping industry.