دانلود رایگان مقاله انگلیسی معماری شبکه هیبریدی مبتنی بر بلاک چین برای شهر هوشمند - الزویر 2018

Abstract:

Recently, the concept of "Smart Cities" has developed considerably with the rise and development of the Internet of Things as new form of sustainable development. Smart cities are based on autonomous and distributed infrastructure that includes intelligent information processing and control systems, heterogeneous network infrastructure, and ubiquitous sensing involving millions of information sources. Due to the continued growth of data volume and number of connected IoT devices, however, issues such as high latency, bandwidth bottlenecks, security and privacy, and scalability arise in the current smart city network architecture. Designing an efficient, secure, and scalable distributed architecture by bringing computational and storage resources closer to endpoints is needed to address the limitations of today's smart city network. In this paper, we propose a novel hybrid network architecture for the smart city by leveraging the strength of emerging Software Defined Networking and blockchain technologies. To achieve efficiency and address the current limitations, our architecture is divided into two parts: core network and edge network. Through the design of a hybrid architecture, our proposed architecture inherits the strength of both centralized and distributed network architectures. We also propose a Proof-of-Work scheme in our model to ensure security and privacy. To evaluate the feasibility and performance of our proposed model, we simulate our model and evaluate it based on various performance metrics. The result of the evaluation shows the effectiveness of our proposed model.

5. Conclusions

With IoT advancing and flourishing, a lot of data will be produced by different devices in the context of smart cities. Achieving low latency, reducing bandwidth usage, and improving security and privacy and scalability are the major challenges of smart cities. In this context, we have focused on these limitations by proposing a hybrid distributed architecture for a sustainable smart city network in this paper. A memory-hardened PoW scheme was used in our proposed model to ensure security and privacy and avoid tampering of information by attackers. The result of the experimental analysis showed the effectiveness of our proposed model. There are still some limitations in our proposed model such as efficient deployment of edge nodes and enabling of caching technique at the edge nodes, so we will carry out related future work.