KEYWORDS: Clouds, Internet of things, Data communications, Telecommunications, Design and modelling, Data transmission, Data processing, Visualization, Parallel computing, Control systems
In line with the development trend of deep integration of energy transformation and information technology, the power network will enter the digital era of the Internet of Everything. With the large increase in power IoT equipment, new business needs such as real-time collection, low latency, and remote operation and maintenance have emerged, and the mainstream protocols of the Industrial Internet of Things cannot fully adapt to the proprietary protocols of various power specialties, and it is difficult to meet the access requirements of the Power Internet of Things. Google's Bottleneck Bandwidth and Round-trip propagation time (BBR) has attracted widespread attention and research because of its high bandwidth utilization and low latency. Based on the BBR congestion control algorithm, this paper proposes a high-performance multi-protocol access technology to realize the cloud protocol gateway that supports million-level long-term connection access, hot-loading plugin mechanism, and multi-protocol communication plugin. As a pre-communication component of the IoT management platform, it is tailored for terminals in the power industry, providing MQTT, CoAP, HTTP, DL/T698.45 and other industry protocol resolution services, and can support intelligent terminals such as intelligent terminals, energy controllers, and energy routers to easily migrate to the cloud.
KEYWORDS: Blockchain, Databases, Design and modelling, Data modeling, Telecommunications, Tolerancing, Systems modeling, Failure analysis, Technology, Computing systems
The emergence of cryptocurrencies has promoted the development of blockchain technology. However, due to the low performance and poor scalability of the blockchain, it is difficult to apply the blockchain technology to production. Analysis of its essential reason is mainly caused by the distributed consensus protocol. Distributed consensus protocols provide data transparency, integrity, and immutability in a decentralized and untrusted environment, but good security greatly sacrifices scalability. In order to improve the performance and scalability of the system. This paper first improves the Byzantine consensus protocol and improves the throughput of a single shard; on this basis, an efficient shard formation protocol is designed, which can safely assign nodes to shards. This paper relies on trusted hardware (SGX) to achieve consensus and sharding protocol performance improvements. Second, we design a transaction protocol that ensures transaction security and flexibility even when the transaction coordinator is malicious; finally, our research is extensively evaluated on local clusters and on Google Cloud Platform. The results show that the consensus and shard formation protocol in this paper outperforms other advanced solutions in scale and can well scale the blockchain system through sharding and consensus formation protocol. More importantly, the scalable blockchain system based on the sharding strategy proposed in this paper achieves high throughput and can handle Visa-level workloads.
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