基于CoAP的物联网Web服务统一访问方法

提出了1种将不同规范的RFID网络无缝接入到Internet的Web服务统一访问架构,并在此基础上进一步提出了1种基于CoAP协议的Web服务访问方法——SOAP/CoAP绑定。实验结果表明,SOAP/CoAP绑定是实现RFID网络Web服务统一访问的有效方法,且相比传统的SOAP/HTTP绑定方法,具有更低的网络开销。     

Reliable M2M/IoT data delivery from FANETs via satellite

The use of unmanned aerial vehicles (UAVs) is rising in several application fields. This work deals with the communication challenges in UAV swarms, or flying ad hoc network (FANET), when taking into account non–line‐of‐sight scenarios. The use of satellites is a necessity in such operating conditions; thus, this work provides architectural considerations and performance assessments when several (FANETs) share an uplink random access satellite channel, fed with M2M/IoT traffic generated from on‐board sensors, to be reliably delivered to a remote ground destination.     

基于CoAP的智能燃气数据管理系统

在近年来物联网技术快速发展,如何将智能物联网设备数据与企业信息系统集成是物联网技术的核心.本文首先介绍了企业信息系统SOA架构与底层传感器网络集成已有的两种方案,然后提出了一种回避两种已有方案缺点的混合方案,并依据燃气公司远程抄表的实际背景实现该方案,即实现了一种基于CoAP的智能燃气数据管理系统.实验结果表明,该设计方案是可行的,具有扩展性强,传输效率高等特点.     

CoAP协议研究

针对某些M2M应用中存在网络和节点资源受限的情况,不适用HTTP,介绍和分析了受限应用协议CoAP(Constrained Application Protocol)的特点及其与HTTP的映射,并将CoAP和HTTP进行对比研究,发现CoAP简单、开销小,能很好地满足资源受限环境的应用层通信需求.     

Lightweight and Secure Mutual Authentication Scheme for IoT Devices Using CoAP Protocol

Internet of things enables every real world objects to be seamlessly integrated with traditional internet. Heterogeneous objects of real world are enhanced with capability to communicate, computing capabilities and standards to interoperate with existing network and these entities are resource constrained and vulnerable to various security attacks. Huge number of research works are being carried out to analyze various possible attacks and to propose standards for securing communication between devices in internet of things (IoT). In this article, a robust and lightweight authentication scheme for mutual authentication between client and server using constrained application protocol is proposed. Internet of things enables devices with different characteristics and capabilities to be integrated with internet. These heterogeneous devices should interoperate with each other to accumulate, process and transmit data for facilitating smart services. The growth of IoT applications leads to the rapid growth of IoT devices incorporated to the global network and network traffic over the traditional network. This scheme greatly reduces the authentication overhead between the devices by reducing the packet size of messages, number of messages transmitted and processing overhead on communicating devices. Efficiency of this authentication scheme against attacks such as DoS (denial of service), replay attacks and attacks to exhaust the resources are also examined. Message transmission time reduced upto 50% of using proposed techniques.     

SecureSense: End-to-end secure communication architecture for the cloud-connected Internet of Things

Constrained Application Protocol (CoAP) has become the de-facto web standard for the IoT. Unlike traditional wireless sensor networks, Internet-connected smart thing deployments require security. CoAP mandates the use of the Datagram TLS (DTLS) protocol as the underlying secure communication protocol. In this paper we implement DTLS-protected secure CoAP for both resource-constrained IoT devices and a cloud backend and evaluate all three security modes (pre-shared key, raw-public key, and certificate-based) of CoAP in a real cloud-connected IoT setup. We extend Sics^thSense– a cloud platform for the IoT– with secure CoAP capabilities, and compliment a DTLS implementation for resource-constrained IoT devices with raw-public key and certificate-based asymmetric cryptography. To the best of our knowledge, this is the first effort toward providing end-to-end secure communication between resource-constrained smart things and cloud back-ends which supports all three security modes of CoAP both on the client side and the server side. SecureSense– our End-to-End (E2E) secure communication architecture for the IoT– consists of all standard-based protocols, and implementation of these protocols are open source and BSD-licensed. The SecureSense evaluation benchmarks and open source and open license implementation make it possible for future IoT product and service providers to account for security overhead while using all standardized protocols and while ensuring interoperability among different vendors. The core contributions of this paper are: (i) a complete implementation for CoAP security modes for E2E IoT security,  (ii) IoT security and communication protocols for a cloud platform for the IoT, and (iii) detailed experimental evaluation and benchmarking of E2E security between a network of smart things and a cloud platform.     

基于IPv6的配电物联网通信单元设计

国家电网有限公司2019年提出"三型两网、世界一流"战略目标,但是当前台区仅具备配电变压器附近各类电气设备监测功能,从配电变压器出线到用户之间的低压配电网仍然缺乏智能监测管控手段,用户用能信息感知不及时。同时在网络部署结构上无法支撑综合能源服务、数据运营等新业态发展。因此,在配电台区侧提出一种配电物联网通信单元技术方案,基于轻量级物联网操作系统、IPv6高速载波芯片、即插即用组网等技术,研发物联网通信单元,解决低压电力设备通信协议不一致、无统一的IP地址、调试运维困难等问题。最后在某配电室开展试点应用,全面验证了方案及设备的可行性,结果表明物联网通信单元在设备在线率、数据采集成功率方面均具备批量应用能力。     

WSN应用层协议MQTT-SN与CoAP的剖析与改进

针对WSN网络通讯中急需适合其特点的应用层通讯协议的问题,剖析了两种主流的WSN应用层通讯协议并做出改进。通过剖析应用层通讯协议MQTT-SN与CoAP的设计理念与工作机制,展示了协议性能与适用的场景的差异。借助CoAP的优点进一步提出了MQTT-SN的改进方案,使之适合于点对点通讯与大块数据传输的情况。     

智能燃气系统中的通信加密方法

在信息技术快速发展的今天,物联网技术在各行各业中都得到了广泛的应用,其中对硬件设备信息的采集以及传输是其主要应用,但是数据传输过程中会出现严重的数据安全问题,因此本文提出了一种混合通信加密方法.本文首先从物联网设备角度出发,介绍物联网无线通信技术和CoAP传输协议以及加密方法,然后结合物联网设备资源受限制情况,采用NB-IoT技术,并在智能燃气系统中实现了上述加密方法,实验以及测试比较的结果表明,本方法具有可行性.     

基于使用IPv6的低功耗无线个人局域网的无线传感网在智慧路灯中的应用

针对现有的采用电力载波通信(PLC)技术的智慧路灯系统中存在系统结构复杂、兼容性与扩展性差、开发部署周期长和安全性与抗干扰性低的问题,提出了一种基于IPv6的低功耗无线个人局域网(6LoWPAN)的智慧路灯系统。将6LoWPAN应用在对基于PLC的智慧路灯系统的改造中,把原有的PLC节点改成6LoWPAN无线节点,把集中控制器改造为边界路由器,并在应用层上采用了受限应用协议(CoAP)和智能物体网际协议(IPSO)应用框架。通过与基于PLC的智慧路灯进行对比,结果表明采用6LoWPAN无线网络的智慧路灯系统结构简化、兼容性与扩展性高、系统开发部署周期缩短一半以上并且网络安全性和抗干扰性较高。