一种基于IoT控制的小区间功率控制方法

该文针对OFDMA蜂窝系统中上行干扰特性,提出了基于IoT控制的小区间功率控制方法。该方法通过相邻小区相互交换干扰信息,对传统的功率控制进行修正,并根据调整原则和调整步长,提出了4种控制方法,使得系统IoT更稳定,吞吐量更高。仿真证实了这4种控制方法都优于传统未加IoT控制的功率控制方法,其中基于固定比较对象的自适应调整步长的功率控制方法最优。     

电信边缘云概述

随着5G和物联网的发展,集中式的云计算模型不能适应新的应用场景,出现了边缘云技术.本文从运营商的角度介绍了电信边缘云的概念、框架、关键技术和服务能力,简介了中国电信一些实践.最后对电信边缘云的发展提出了一些建议.     

基于物联网的智能家居服务网关的设计

为了实现智能家居系统中的远程及近程控制,从物联网的概念出发,设计实现了一个嵌入式的WEB网关服务器,将基于Zigbee协议的无线传感器网络与基于TCP/IP协议的Internet相联。该设计采用STM32F107VC为主控制器,通过串口实现与WSN协调器的通信,外接一个网卡芯片实现与Internet的连接。在软件设计上重点实现智能家居通信控制系统,并引入嵌入式操作系统uCOS-II对系统资源进行管理,移植LwIP协议栈实现TCP/IP的基本功能。     

物联网分布式路由中基于Beta函数的抗攻击信任管理模型

With the rapid development of Internet of Things (IoT), the issue of trust in distributed routing systems has attracted more research attention. The existing trust management frameworks, however, suffer from some possible attacks in hostile environments, such as false accusation, collusion, on-off, and conflicting behavior. Therefore, more comprehensive models should be proposed to predict the trust level of nodes on potential routes more precisely, and to defeat several kinds of possible attacks. This paper makes an attempt to design an attack-resistant trust management model based on beta function for distributed routing strategy in IoT. Our model can evaluate and propagate reputation in distributed routing systems. We first describe possible attacks on existing systems. Our model is then proposed to establish reliable trust relations between self-organized nodes and defeat possible attacks in distributed routing systems. We also propose a theoretical basis and skeleton of our model. Finally, some performance evaluations and security analyses are provided to show the effectiveness and robustness of our model compared with the existing systems.     

A novel energy‐aware routing mechanism for SDN‐enabled WSAN

Energy consumption is one of the most important design constraints when building a wireless sensor and actuator network since each device in the network has a limited battery capacity, and prolonging the lifetime of the network depends on saving energy. Overcoming this challenge requires a smart and reconfigurable network energy management strategy. The Software‐Defined Networking (SDN) paradigm aims at building a flexible and dynamic network structure, especially in wireless sensor networks. In this study, we propose an SDN‐enabled wireless sensor and actuator network architecture that has a new routing discovery mechanism. To build a flexible and energy‐efficient network structure, a new routing decision approach that uses a fuzzy‐based Dijkstra's algorithm is developed in the study. The proposed architecture can change the existing path during data transmission, which is the key property of our model and is achieved through the adoption of the SDN approach. All the components and algorithms of the proposed system are modeled and simulated using the Riverbed Modeler software for more realistic performance evaluation. The results indicate that the proposed SDN‐enabled structure with fuzzy‐based Dijkstra's algorithm outperforms the one using the regular Dijkstra's and the ZigBee‐based counterpart, in terms of the energy consumption ratio, and the proposed architecture can provide an effective cluster routing while prolonging the network lifetime.     

面向多用户室内可见光通信系统优化研究

可见光通信(VLC)技术将照明与通信有机结合,在长距离和短距离传输方面都具有很大应用潜能。本文将VLC系统室内传输模型进行研究,提出了适合多用户的室内传输模型的同时,进一步进行优化、修正,对物联网的室内应用具有参考意义。     

基于物联网的集装箱感知系统研究与应用

介绍了一种基于物联网的集装箱感知系统的实现和应用,为大规模商业应用提供了一种可行性方案。该系统利用RFID、无线数据通信和互联网等技术,实现无人干预下的集装箱自动识别、信息共享和智能管理。     

State-of-the-art survey on digital twin implementations

Digital twin (DT) has garnered attention in both industry and academia. With advances in big data and internet of things (IoTs) technologies, the infrastructure for DT implementation is becoming more readily available. As an emerging technology, there are both potential and challenges. DT is a promising methodology to leverage the modern data explosion to aid engineers, managers, healthcare experts and politicians in managing production lines, patient health and smart cities by providing a comprehensive and high fidelity monitoring, prognostics and diagnostics tools. New research and surveys into the topic are published regularly, as interest in this technology is high although there is a lack of standardization to the definition of a DT. Due to the large amount of information present in a DT system and the dual cyber and physical nature of a DT, augmented reality (AR) is a suitable technology for data visualization and interaction with DTs. This paper seeks to classify different types of DT implementations that have been reported, highlights some researches that have used AR as data visualization tool in DT, and examines the more recent approaches to solve outstanding challenges in DT and the integration of DT and AR.The full text can be downloaded at https://link.springer.com/article/10.1007/s40436-021-00375-w     

面向医疗行业物联网：概念、架构及关键技术研究

从物联网在医疗行业中的应用现状着手,分析了现有的面向医疗行业物联网的概念,并从狭义和广义角度对其进行剖析。借鉴物联网的现有体系架构,针对面向医疗行业物联网的特点,分析了医疗物联网体系架构设计时应考虑的领域业务范畴和体系架构模型标准,并对面向医疗行业物联网的关键技术进行归纳,分析其在医疗领域应用的场合,最后指出未来智慧医疗的发展方向。     

区块链赋能的高效物联网数据激励共享方案

近年来,随着大量设备不断地加入物联网中,数据共享作为物联网市场的主要驱动因素成为了研究热点.然而,当前的物联网数据共享存在着出于安全顾虑和缺乏激励机制等原因导致用户不愿意参与共享数据的问题.在此背景下,区块链技术为解决用户的信任问题和提供安全的数据存储被引入到物联网数据共享中.然而,在构建基于区块链的安全分布式数据共享...