The processing and power-consumption constraints of the Internet of Things devices hinder them to offer more complex network services than the simple data transmission in smart city scenarios. The lack of complex services, such as security and quality of service, can even foster disasters in urban centers. In this paper, we propose the integration of complex network services from the IoT devices till a cloud environment through an agile and effective network function virtualization infrastructure of isolated IoT domains. Therefore, our proposal develops a simple gateway access node that virtualizes the domains to which the devices connect. A prototype for services of security and quality of service has been implemented and its evaluation shows that virtualization of the access node does not impact the performance of virtual network functions. The results also show that the proposal provides security for IoT devices, identifying malicious traffic with 99.8% accuracy, avoiding denial of essential services, and ensuring the quality of service.

中文翻译：

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物联网的敏捷有效的网络功能虚拟化基础架构

物联网设备的处理和功耗限制使其在智能城市场景中无法提供比简单数据传输更复杂的网络服务。缺乏诸如安全性和服务质量之类的复杂服务，甚至会加剧城市中心的灾难。在本文中，我们建议通过隔离的IoT域的灵活有效的网络功能虚拟化基础架构，将复杂的网络服务从IoT设备到云环境进行集成。因此，我们的建议是开发一个简单的网关访问节点，以虚拟化设备所连接的域。已实现了安全性和服务质量的服务原型，其评估显示访问节点的虚拟化不会影响虚拟网络功能的性能。