M2M功能架构与安全研究

M2M通信被看作是一种不需要人际互动的机器之间的通信形式,通过通信网络传递信息从而实现机器与机器或人与机器的数据交换。M2M作为物联网在现阶段发展的主要存在形式,其功能架构和安全问题值得重视,文中主要围绕M2M功能架构与安全问题展开研究。针对此问题,欧洲电信标准化协会详细说明了M2M系统相关的安全需求,对机密性、完整性、身份认证以及授权批准进行了研究。此外ETSI还对M2M系统的功能架构进行了设计,提出了概要层的架构方案。最后对该功能架构中各部分涉及安全的模块作了进一步分析。     

M2M技术能否促进RFID应用

通信网络技术的出现和发展,给社会生活面貌带来了极大的变化。人与人之间可以更加快捷地沟通,信息的交流更顺畅。但是目前只是计算机和其他一些IT类设备具备这种通信和网络能力,普通机器设备几乎不具备联网和通信能力,如家电、车辆、自动售货机、工厂设备等。M2M技术的目标就是使所有机器设备都具备连网和通信能力,     

M2M的发展状况与未来

作为物联网在现阶段最普遍的应用形式,M2M已经引起了越来越多的关注。对M2M的发展背景、研究现状及其市场前景进行了深入分析和研究,分析了传统的工业领域、汽车领域以及移动终端之间通信的美好前景,指出了M2M的发展思路与对策。最后给出结论:M2M将改变人们身边的机器,从而最终改变人们的生活。     

无线传感器网络M2M网关的设计与实现

本文主要论述了无线传感器网络与M2M平台对接的关键性技术——M2M网关的设计与实现。无线传感器网络（WSN）具有独立自组网和超低功耗等优点,但是由于其短距离通信的特征,使其应用范围有所限制。将WSN与M2M平台进行对接,是无线传感器网络发展的必然趋势;而M2M网关则是实现对接的关键性技术。无线传感器网络M2M网关,采用嵌入式ARM9处理器S3C2440为核心;以CC2530作为汇聚节点采集WSN数据;利用GPRS模块EM310为网络数据的出口,对接M2M平台服务器。该M2M网关可将WSN与M2M平台相连接,具有很好的通用性,可广泛使用在众多物联网的实际应用中。     

M2M技术助力政府管理的三条路径

基于定位的机器对机器(M2M)技术可以从发布紧急警报到包裹快递和公共安全等方面推动定位M2M技术的市场规模呈爆炸式增长。文章从加强港口安全、智能车队管理和刑事监控等三个方面对美国应用M2M解决方案的情况进行了介绍和分析。     

Man还是Machine？——M2M的意义呈现

M2M,或物联网,正催生下一代引领性新概念。IBM主张的智慧地球,从举的例子——如智能电网——来看,也八九不离M2M或物联网。喜欢思考的人不禁会想,M2M对我们意味着什么：难道互联网会从以人为中心,转向以物为中心？     

LwM2M在智能电表通信模块上的应用

通信模块是智能电表重要的数据传输单元，在目前的电力系统中仍缺少有效的通信模块管理方法。该文利用LwM2M协议可容纳广泛的应用程序的特点，提出了一种智能电表通信模块的管理方法。该方法将LwM2M客户端部署到通信模块中，将通信模块数据抽象化为LwM2M对象实例以供LwM2M服务端访问，从而实现通信状态的监测及通信模块软件的在线升级。测试结果表明，该方法能简单、可靠、高效地管理通信模块，功能可扩展性强。     

面向M2M通信的传输控制机制与方法

M2M通信是物联网的重要组成部分,其中基于IP的M2M通信方式实现了网络节点的统一编址、统一协调和统一管理,成为当前的研究重点和热点。传统TCP差错控制机制把数据丢失原因简单地归结为网络拥塞,并采用拥塞控制机制来解决,而忽略了无线连接存在的链路高比特误码率、拓扑频繁变化、信道非对称性、MAC协议的不公平性等缺陷,使得传统TCP不适合在高可靠性M2M通信中使用。分析了影响M2M通信的TCP因素和改进方法,以端对端连接、拆连接和混合连接3种方式分别讨论了相应的解决方案,提出了TCP在M2M通信中的改进思路和研究方向。     

M2M设备远程签约信息管理研究

M2M通信被看作是一种可能没有人际互动的实体与实体之间的通信形式.它面临的一个重大挑战是设备在没有人员值守的情况下的远程管理问题.针对此问题,3GPP标准化组织提出了一种基于可信环境(Trusted Environment,TRE)的M2M设备远程签约信息管理方案和基于通用集成电子卡(Universal Integrated Circuit Card,UICC)的两类解决方案.前者不需要给每一个设备安装UICC,而是可以将重要的认证数据和功能集成在M2M设备上TRE模块里.最后对方案的安全性和性能作了进一步研究和说明.     

德国电信推全球首个M2M市场

德国电信公司近日推出了面向全球的M2M市场平台,供厂商和开发商提供与M2M通信相关的硬件、软件、应用和整体解决方案等。该公司称,这是全球首个针对M2M的应用市场。德国电信称,该M2M市场可以说是一个全球分销平台。厂商除自有渠道外,可在该市场平台上发布自己的产品,附上详细的说明和图片。而用户则可看到全球的M2M产品并充分比较,可下载技术说明书,找到最适合自己的单个产品或是打包服务。     

Dynamic LTE resource reservation for critical M2M deployments

Machine-to-machine (M2M) communications are envisioned to be major contenders for long term evolution (LTE) cellular resources in the time of fifth generation (5G) wireless communications and beyond. They will be used for a variety of applications on which users will rely for managing many aspects of their daily life. One of the promising fields in which M2M communications can play a major role is the field of emergency services. In such situations, it is crucial to ensure the reliable allocation of communication resources to M2M communications to ensure the right decisions and actions are taken in a timely manner. One of the techniques that could be used to ensure sustained and reliable resource allocation is to use an LTE-based virtual resource-slicing scheme. This scheme ensures a dynamic and an uninterrupted allocation of the resources dedicated to M2M communications in such a way that accommodates the changing needs of the emergency operations. In this paper, we introduce two schemes to allocate LTE resources to M2M emergency deployments in an adaptive manner. These schemes ensure that the resource allocation responds to the changing needs of the underlying emergency application. The adaptation period is also varied in response to the speed of change of the allocation requirements. This is done to ensure that the devices involved in critical missions are not competing for resources with the rest of network clients. We conduct several experiments to assess the success of the proposed schemes in responding to the needs of emergency M2M deployments.     

Towards smart city: M2M communications with software agent intelligence

Recent advances in the fields of wireless technology have exhibited a strong potential and tendency on improving human life by means of ubiquitous communications devices that enable smart, distributed services. In fact, traditional human to human (H2H) communications are gradually falling behind the scale of necessity. Consequently, machine to machine (M2M) communications have surpassed H2H, thus drawing significant interest from industry and the research community recently. This paper first presents a four-layer architecture for internet of things (IoT). Based on this architecture, we employ the second generation RFID technology to propose a novel intelligent system for M2M communications.     

对电信运营商发展M2M业务的思考

M2M作为典型的物联网业务,受到产业链的广泛关注。本文在总结国际标准化组织对M2M热点问题的标准化研究以及电信运营商对M2M业务开展现状的基础上,对电信运营商发展M2M业务过程中已经出现和将要产生的需求进行分析,最后,对电信运营商发展M2M业务进行支撑平台、专用网元等技术方面的探索。     

利用ZigBee技术和安卓平台实现M2M通信

M2M通信(Machine to Machine Communication)目前已在物联网范畴内获得巨大的应用,基于灵活易用和良好的移动性,M2M主要采用无线系统架构来实现,例如ZigBee、WiFi和蜂窝网络等.本文采用ZigBee技术,在Android平台采用Java语言设计实现了一种新的M2M应用:近距离即时通讯,该应用可在车联网或其它小区域内数据共享等低速率传输领域获得较好的推广.     

物联网M2M的安全分析及策略

物联网M2M的先进理念引来了新一轮的无线革命,也暴露出物联网的安全隐患。在此以M2M的前端传感器及设备、网络和末端IT系统三个部分为出发点,提出了从十三个方面来分析物联网所面临的安全隐患问题,并大胆提出了相应的解决策略。     

基于物联网的矿山环境在线实时监测系统研究与实现

针对矿山实际需求情况,应用物联网技术,实现矿山环境的在线实时监测;建立一个无线传感网络,通过GSM、Wifi接人Internet,实现自动采集矿山环境数据,构建一个矿山环境在线实时监测网络;对Zigbee技术与环境检测传感器相结合应用技术进行研究,实现矿山整体环境实时在线监测,并已投入实际应用,具有很好的推广应用前景.     

2M光接口及其在电力通信线路保护业务中的应用研究

本文针对中山电网电力通信线路保护业务的现状及存在的问题,在分析2M光接口应用研究情况的基础上,提出了2M光接口的线路保护业务模型。随着61850标准的推广、统一的2M光接口的应用,该模型将使线路保护业务与其他控制系统在厂站端更加趋向融合。     

Efficient cooperative access class barring with load balancing and traffic adaptive radio resource management for M2M communications over LTE-A

We propose two efficient cooperative access class barring with load balancing (CACB-LB) and traffic adaptive radio resource management (TARRM) schemes for M2M communications over LTE-A. The proposed CACB-LB uses the percentage of the number of Machine-Type Communication (MTC) devices that can only access one eNB between two adjacent eNBs as a criterion to allocate those MTC devices that are located in the overlapped coverage area to each eNB. Note that an eNB is a base station of LTE-A. In this way, the proposed CACB-LB can achieve better load balancing among eNBs than CACB, which is the best available related work. The proposed CACB-LB also uses the ratio of the channel quality indication that an MTC device received from an eNB over the number of MTC devices that attach to the eNB as a criterion to adjust the estimated number of MTC devices that may access the eNB. As a result, the proposed CACB-LB can have a better set of barring rates of access class barring than CACB and can reduce random access delay experienced by an MTC device, which is also applicable to user equipment (UE). After an MTC device successfully accesses to an eNB, the eNB needs to allocate radio resources for the MTC device. In addition, the proposed TARRM allocates radio resources for an MTC device based on the random access rate of the MTC device and the amount of data uploaded and downloaded by the MTC device in a homogeneous MTC device network, and the priority of an MTC device in a heterogeneous MTC device network. Furthermore, we use the concept from cognitive radio networks such that if there are unused physical resource blocks (PRBs) of UEs, an eNB can schedule MTC devices to use these PRBs to enhance the throughput performance. Simulation results show that either in a homogeneous MTC device network or in a heterogeneous MTC device network, the proposed CACB-LB’s average access delay of UEs/MTC devices and average throughput from UEs/MTC devices are better than CACB’s. The proposed CACB-LB with TARRM’s average throughput from UEs/MTC devices is also higher than CACB’s. Therefore, the proposed CACB-LB with TARRM is feasible for M2M communications over LTE-A.     

基于M2M技术的矿区环境监测平台研究

为了有效监控矿区环境状况,预防安全事故的发生,介绍了一种基于M2M技术的矿区环境监测平台的设计方案。该平台采用M2M技术对矿区温湿度、瓦斯体积分数、土壤压力等环境数据进行监测,并采用RSSI算法实现矿区人员定位功能;采用最小二乘法对各环境监测数据进行曲线拟合处理后在上位机监控界面进行实时显示。实验结果表明,该平台运行良好,通信正常,且经拟合处理后的环境监测数据曲线更光滑,大大减小了数据误差。