The promising emergence of cloud systems can bring significant benefits to cloud-centric IoT applications in terms of both their platform management and improvements to quality of service. Edge or fog computing, where edge nodes mainly contribute their computing resources voluntarily, has been attracting great attention for their ability to overcome scalability problems and to alleviate the load of cloud computing servers in the traditional cloud-centric IoT architecture. However, since high-data-rate devices have become ubiquitous in IoT and huge amounts of data need to be transmitted to end users, providing such a platform by renting a service from commercial clouds is costly and inefficient. Thus, this article describes a novel approach for edge-node-assisted data transmission in the cloud-centric IoT architecture (ETC-IoT) to overcome the problem of overwhelming bandwidth consumption in the cloud. It explores the bandwidth resources of edge nodes by extending the existing paradigm of edge computing in the cloud-centric IoT architecture. Specifically, the central cloud sends the replicas of IoT data to edge nodes according to designed replica distribution strategies. Then an edge node owning the replicas can respond to multiple requests from its associated local end users by using its bandwidth resources, while the central cloud supplements any shortfall to satisfy end-user demands if edge nodes cannot accommodate requests.

中文翻译：

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ETC-IoT：以云为中心的物联网的边缘节点辅助传输

云系统的有前途的兴起可以在以平台为中心并提高服务质量方面为以云为中心的物联网应用带来巨大的好处。边缘节点主要依靠自愿贡献其计算资源的边缘或雾计算，由于其克服了可伸缩性问题并减轻了传统的以云为中心的物联网架构中的云计算服务器的负载的能力而备受关注。但是，由于高数据速率设备已在物联网中无处不在，并且需要将大量数据传输给最终用户，因此通过从商业云租用服务来提供这样的平台既昂贵又效率低下。因此，本文介绍了一种以云为中心的物联网架构（ETC-IoT）中边缘节点辅助数据传输的新颖方法，以克服云中压倒性的带宽消耗问题。它通过扩展以云为中心的物联网架构中边缘计算的现有范例来探索边缘节点的带宽资源。具体来说，中央云根据设计的副本分发策略将IoT数据的副本发送到边缘节点。然后，拥有副本的边缘节点可以通过使用其带宽资源来响应与其关联的本地最终用户的多个请求，而如果边缘节点无法容纳请求，则中央云将补充任何不足之处，以满足最终用户的需求。它通过扩展以云为中心的物联网架构中边缘计算的现有范例来探索边缘节点的带宽资源。具体来说，中央云根据设计的副本分发策略将IoT数据的副本发送到边缘节点。然后，拥有副本的边缘节点可以通过使用其带宽资源来响应与其关联的本地最终用户的多个请求，而如果边缘节点无法容纳请求，则中央云将补充任何不足之处，以满足最终用户的需求。它通过扩展以云为中心的物联网架构中边缘计算的现有范例来探索边缘节点的带宽资源。具体来说，中央云根据设计的副本分发策略将IoT数据的副本发送到边缘节点。然后，拥有副本的边缘节点可以通过使用其带宽资源来响应与其关联的本地最终用户的多个请求，而如果边缘节点无法容纳请求，则中央云将补充任何不足之处，以满足最终用户的需求。