基于C8051F310的在线监测／软件升级器件设计

研究了利用单总线(One-BUS)对航模无电刷、无传感器电机控制器进行软件升级.利用C8051F310单片机进行控制,并阐述了C8051F310单片机在应用中编程以及利用One-BUS技术实现软件远程升级的方法,着重讨论了单片机远程升级和在线监测的可靠性.整个控制系统充分利用芯片上资源以及其高效的处理能力,省去了以往设计中复杂的硬件电路,简化了系统的硬件结构.     

基于PLC和组态王的激光器功率监控系统

提出了一套采用组态王(KINGVIEW)软件作为上位机 远程监测功率 的变化、利用可编程逻辑控制器(PLC,programmable light controller)作为下位机实现对 激光器功率控制的整体设计方案。实验结果表明,本文提出的系统可以实时监 测和记录激光器功率的变化,提高了激光器功率的监控水平;运用远程调节激光器功率方法 ,不仅提高了实验效率,而且在控制精度方面,通过修改PLC程序 参数自动调 节激光器功率,增强了调节的适应性。系统运行良好,可以更好满足激光干涉仪诊断等离 子体电子密度的需要。     

基于WDM和TDM的串联FBG高速列车定位系统

介绍了一种基于波分复用(WDM)和时分复用(TDM)串联光纤Bragg光栅(FBG)的高速列车定位系统.用快速的光功率监测替代FBG的波长监测,定位时延较小(0.2 s);波长漂移转化为光功率的一对负正脉冲波动,提高了定位自动识别的准确性;同时WDM与TDM相结合的系统结构设计,扩大了列车定位系统监测的总长度.     

基于SYSLOG的网络监测管理系统设计与实现

日志（SYSLOG）对于网络的正常运营和监测管理非常重要。文章对设备日志的管理和监测的基本方法作了介绍。如何对日志信息实施监测、管理，及时、准确地定位网络故障点和质量劣化点，这是众多企业非常关注的问题。在对广电城域网日志分析的基础上设计开发的系统为广电城域网络监测管理提供了一种可行的方法。     

偏振副载波调制在光纤色散与PMD监测技术中的应用

利用偏振副载波调制(SCM)的方法,协同监测光纤通信系统的色散(CD)和偏振模色散(PMD).通过发送端叠加2个不同频率的副载波、接收端监测2副载波对应的功率和功率比值的方法协同监测光纤通信系统的CD和PMD.接收端副载波功率随CD和PMD的增加而增加,其比值随CD的增加而增加、随PMD的增加而减小,通过监测2副载波的功率和其比值,可以实现CD与PMD的协同监测.     

WLAN网络智能管理系统

中国移动通信集团广东有限公司珠海分公司开发的WLAN(无线局域网)网络智能管理系统解决了AP(接入点)设备数量庞大、维护人员数量有限、设备种类繁多、不支持标准网管、提高全网设备的监控力度和系统指标等众多技术难题,利用WLAN智能监控系统网管技术,实现对全网设备的实时监控,包括AP接入用户数、AP流量、热点流量及行为。该系统具有良好的扩展性、高效的稳定性、操作的简洁性,确保了珠海移动不断扩展的无线网络能高效稳定的运行。     

光传送网的性能监测方案

在简要回顾传统性能监测方案的基础上,引入了插入型(Intrusive )和非插入型(Non-intru-sive)在线性能监测的分类方式,着重阐述了基于模拟量监测的非插入型光性能监测方案。     

SDRAM控制器的FPGA设计与实现

介绍了利用现场可编程门阵列(FPGA)实现同步动态随机存储器(SDRAM)控制器的方法,着重于FPGA具体实现过程中的一些常见问题.分析了设计中所用的SDRAM性能、特点,给出了其读写时序状态图,给出SDRAM初始化方式及其相应的模式设置值,并根据本设计的实际情况对SDRAM状态机进行了简化,给出了一种相对容易实现的SDRAM状态机.本设计采用甚高速集成电路硬件描述语言(VHDL)编程,直观而且占用资源较少,其基本设计原理对其他同类SDRAM也适用,对需要大容量存储器的应用是较经济的设计.     

智能微波炉控制器研究与设计

控制器设计微控制器(MCU)为核心,基于RTX51编制软件系统,结合必要的外围电路,完成微波炉的可编程智能控制.系统由计时控制、火力设定、用户界面、音响发生、数据保持及远程信息控制模块组成.能够根据键盘输入完成相应的功能,使用LCD显示系统状态.并且可以通过串口与计算机通信,利用Internet实现远程操作、烹调方案下载、时间同步等信息控制功能.     

创智专栏——HFC网络设备状态监测及网管系统

应广电总局关于加强广播电视网络运营管理系统研究的号召,研制开发具有国内自主知识产权、符合国际开放标准的HFC网络管理系统具有非常重要的意义。随着双向HFC网络的迅速成长,网络的安全性和可靠性变得越来越重要。状态监控和在线测试是提高HFC网络安全性和可靠性最有效的方法。本文主要论述创智宽带系统有限公司与深圳劲成公司联合研制开发的HFC网络设备状态监测及网管系统、国际化标准HMS及以此标准为基础实现的网络管理设备和系统。广电运营商借助此系统可以实现对网络设备配置、状态(故障、性能)的监测,保障网络正常运行。     

一种自主可控ATCA平台的高速数据处理方案设计与实现

随着国产处理器的不断成熟以及国家信息化建设的自主可控要求提高,基于国产处理器的先进通信计算机架构(Advanced Telecommunications Compute Architecture, ATCA)的产品平台设计成为潮流和趋势。FT-2000/4国产处理器凭借其稳定的性能表现被广泛应用于自主可控产品的设计中,但是ATCA平台下,FT-2000/4国产处理器由于传统网络I/O的过高开销,往往无法满足高速线路接入需求,极大限制了其应用场景。针对上述问题,提出了一种基于DPDK软件数据包加速处理技术的数据接入模块设计,并且改进了数据分发策略,提出了一种自适应流量控制算法。实验表明,该模块不仅极大提升了国产化ATCA单板的数据接入能力,自适应流量控制算法也能够通过动态调整数据匹配分发端口的方式,有效缓解流分发策略不合理带来的业务节点超负荷问题。     

A WKNN-based approach for NB-IoT sensors localization

With the recent introduction of NarrowBand Internet of Things (NB-IoT) technology in the 4th and 5th generations of mobile radio networks, the mobile communications context opens up significantly to the world of sensors. By means of NB-IoT, the mobile systems within 3GPP standardization introduce the peculiar functions of sensor networks, thus making it possible to satisfy very specific requirements with respect to those which characterize traditional mobile telecommunications. Among the functions of interest for sensor networks, the possibility of locating the positions of the sensors without an increase in costs and energy consumption of the sensor nodes is of utmost interest. The present work describes a procedure for locating the NB-IoT nodes based on the quality of radio signals received by the mobile terminals, which therefore does not require further hardware implementations on board the nodes. This procedure, based on the RF fingerprinting technique and on machine learning processing, has been tested experimentally and has achieved interesting performances.     

窄带物联网在专变用户防窃电应用中的研究

针对专变用户窃电问题,文中提出了一种基于窄带物联网的防窃电方案,该方案通过实时监测用户电力系统运行参数来判断是否窃电。准确地说是通过使用LoRa对比真空断路器侧和计量箱侧的电流或功率以及监测计量箱状态判断窃电是否发生。如果发生窃电数据将通过NB-IoT上传至OneNET平台,然后通过API将平台数据传送至Web应用。数据通过读取智能电能表、智能开关控制器以及设计高压防窃电监控仪获取。该系统硬件电路以STM32为核心,NB-IoT模块采用中国移动M5311设计。通过安装测试以及数据分析判断,能够有效进行防窃电监测。     

全新的光突发交换网络数据信道性能与故障监测机制

在首次提出探测突发概念的基础上,提出了一种全新的光突发交换网络数据信道性能与故障监测机制,即网元节点向数据信道周期性地或以某种特定方式发送探测突发,并在每个下一跳节点监测探测突发的误码情况,分析其误码特点,依此来评估每两个节点间的数据信道状态,判断被监测网络是否有故障发生.该机制能在很短时间内定位突然中断或恶化的故障信道,还可对所监视网络的老化等软故障进行有效的预警和评估,具有很高的实用价值和可操作性.     

延迟容忍移动传感器网络中基于概率复制的数据传输策略及其性能研究

该文提出了一种基于概率复制的数据传输策略PRD(Probability Replication Delivery scheme)用于空间中间断连通的延迟容忍移动传感器网络(DTMSN)数据传输。PRD由选择复制策略和队列管理组成,前者根据节点将消息传递给汇聚点的可能性,选择下一跳进行复制传输;队列管理则利用引入传输概率及复制数的消息生存时间决定队列中消息丢弃原则。仿真分析表明,与现有的几种数据传输策略相比,PRD能以较低的数据复制数及传输延迟获得较高的数据传输成功率。     

基于LonWorks技术的LED智能照明控制节点设计

介绍了一种基于LonWorks电力载波通信技术的LED照明控制系统的技术方案,该方案采用电力线作为传输介质.LED照明控制系统由上位机、i.LON Smart Server智能服务器和LED照明智能节点组成,以数字信号控制器DsPIC33F和电力线收发器PL3170为核心设计智能节点,实现了LED照明控制系统的环境数据...     

基于分簇的无线多媒体传感器网络数据聚合方案研究

该文提出了一种基于分簇的无线多媒体传感器网络(WMSNs)数据聚合方案(Cluster-based Data Aggregation Algorithm, CDAA)。利用新的分簇方法和数据聚合策略,CDAA可以有效延长网络生命期。根据多媒体节点数据采集的方向性和节点剩余能耗,该文提出新的无线多媒体传感器网络的分簇方法,并基于该分簇方法进行网内多媒体数据聚合。仿真结果表明,该方法能够有效减少冗余数据的传送,与LEACH, PEGASIS等传统WSNs路由协议和针对WMSNs的AntSensNet协议相比,在能耗均衡和节能方面表现出更好的性能。     

An intelligent and knowledge‐based overlapping clustering protocol for wireless sensor networks

Overlapping is one of the topics in wireless sensor networks that is considered by researchers in the last decades. An appropriate overlapping management system can prolong network lifetime and decrease network recovery time. This paper proposes an intelligent and knowledge‐based overlapping clustering protocol for wireless sensor networks, called IKOCP. This protocol uses some of the intelligent and knowledge‐based systems to construct a robust overlapping strategy for sensor networks. The overall network is partitioned to several regions by a proposed multicriteria decision‐making controller to monitor both small‐scale and large‐scale areas. Each region is managed by a sink, where the whole network is managed by a base station. The sensor nodes are categorized by various clusters using the low‐energy adaptive clustering hierarchy (LEACH)‐improved protocol in a way that the value of p is defined by a proposed support vector machine–based mechanism. A proposed fuzzy system determines that noncluster heads associate with several clusters in order to manage overlapping conditions over the network. Cluster heads are changed into clusters in a period by a suggested utility function. Since network lifetime should be prolonged and network traffic should be alleviated, a data aggregation mechanism is proposed to transmit only crucial data packets from cluster heads to sinks. Cluster heads apply a weighted criteria matrix to perform an inner‐cluster routing for transmitting data packets to sinks. Simulation results demonstrate that the proposed protocol surpasses the existing methods in terms of the number of alive nodes, network lifetime, average time to recover, dead time of first node, and dead time of last node.     

Multi-controller balancing deployment strategy based on reliability evaluation in SDN

The control plane has low reliability and controller loads were unbalanced in distributed software defined networks,and a multi-controller balancing deployment strategy based on reliability evaluation was proposed.Firstly,node reliability was evaluated by weighting node efficiency and path quality,optimizing the controller location with balancing factor.Then based on improved k-center clustering,the redundant functions was introduced and the switch allocation was completed according to node attractiveness degree and controller load balancing rate,achieving a reasonable SDN sub-domain planning.The simulations show that compared with the existing strategy the number of required controllers is reduced by an average of 22.1%.The control plane elasticity is enhanced,and the controller load balancing performance has been improved significantly.     

Self-configurable fault monitoring in ad-hoc networks

While fault monitoring is a well-known issue in fixed wired networks, ad-hoc networks provide new challenges with respect to this issue: in particular, the monitoring task may be hindered at any time by the impossibility to observe a given node. This paper proposes a fault monitoring approach for ad-hoc networks which takes into account this constraint. Our approach is based on an information theory measure suitable to the intermittence of ad-hoc nodes and capable to detect network failures by inference. We define a distributed monitoring scheme with several collaborative detection methods, and we detail a self-configuration mechanism based on the K-means classification algorithm. We show how this solution can be integrated into a management architecture and evaluate its performance based an extensive set of simulations.