Low-energy wireless communication network design

Energy-efficient wireless communication network design is an important and challenging problem. Its difficulty lies in the fact that the overall performance depends, in a coupled way, on the following subsystems: antenna, power amplifier, modulation, error control coding, and network protocols. In addition, given an energy constraint, improved operation of one of the aforementioned subsystems may not yield better overall performance. Thus, to optimize performance one must account for the coupling among the above subsystems and simultaneously optimize their operation under an energy constraint. In this article we present a generic integrated design methodology that is suitable for many kinds of mobile systems and achieves global optimization under an energy constraint. By pointing out some important connections among different layers in the design procedure, we explain why our integrated design methodology is better than traditional design methodologies. We present numerical results of the application of our design methodology to a situational awareness scenario in a mobile wireless network with different mobility models. These results illustrate the improvement in performance that our integrated design methodology achieves over traditional design methodologies, and the tradeoff between energy consumption and performance.     

Wireless powered communication network optimization using PSO-CS algorithm

Wireless Networks - Wireless powered communication network (WPCN) is a promising technique to resolve the power constraint issue faced by wireless nodes at the same time it also provides green and...     

机动干线通信网站址规划问题研究

站址规划是对网络节点布设的优化设计,是网络规划的基础。机动干线通信网的 特点使得站址规划的设计显得尤为重要。通信地域的生成是基于规划意图,或者根据已有的 用户或用户群的分布自动确定。站址规划的目的是尽可能使所有用户都能比较方便地入网。 站址的规划设计不但要考虑地理上的可设置性,同时要考虑网络的区域覆盖问题。     

Optimal design improving a communication network reliability

Improvement of the reliability of a communication network is an optimal problem that finds some links to add to the network such that the reliability of the network reaches a given level and the total cost of these links is minimized. A decomposition method based on branch and bound is used for solving the problem. In order to speed up the solution procedure, an upper bound on system reliability in terms of node degrees is applied. Specially, when the threshold P_o is large enough, a new algorithm, the cut tree algorithm, can more effectively give the optimal solution.     

RF bridges to the network [RF IC design]

Chips that dwell at the boundary between the electronics and the transmission medium and run at network speeds are growing in importance, and so are the tools that design them. In this paper, RF IC design tools and their developers are examined by the author     

Wireless communications in the automated factory environment

The networking issues involved in the use of infrared communications in a factory environment are described. A brief history of the use of infrared and radio for indoor (factory environment) communications is given, and the physical infrared environment is reviewed. Topology and protocol alternatives are compared     

河南油田通信网络升级改造方案设计

根据计算机网络技术发展趋势和油田计算机网络的现状,本设计采用接入层、汇聚层、核心层三个层次网络构架,更新出口路由器为防火墙、更新核心交换机、新建缓存系统、认证和网管系统等,进而实现系统整体升级。     

半导体芯片厂有害气体检测器使用经验之探讨

本文除概略介绍气体检测器的种类处，主要对气体检测器的原理和在实际使用中的局限性作一基本归纳叙述。限于篇幅，本文将论述的重点放在气体检测器的选用与设置规划上，提出个人的一点心得与看法，以作为未来设置气体检测器系统时之参考。     

Wireless network design: solution-oriented modeling and mathematical optimization

As the telecommunication industry matures, there is vital interest in good network designs. Many planning tasks in wireless networks are particularly complex and challenging. A solution-oriented modeling approach can help to devise efficient automatic planning and optimization schemes. This article discusses how good mathematical models can be obtained for real-world problems, which model structures facilitate good computational behavior, and which advanced tools are available for solving such models. The trade-off between capturing the fine characteristics of technologies and the simplicity of the model is illustrated for several technologies and example problems     

光通信网络在电力配电自动化系统中的设计思路构架

本文主要通过对电力配电自动化系统通信网络发展过程中存在的问题进行分析,来分析电力配电自动化系统光通网络设计的思路,已制定出科学的配电自动化系统光通信网络设计方案,以保障电力配电自动化系统光通信网络的正常运行。据此,有利于推动电力配电通信网的自动化发展,充分利用现代计算机信息技术,以提高电力配电自动化系统光通信网络的运行效率,从而保障电力事业的可持续发展。     

基于LPC2103的无线传感器网络节点设计

设计合理的网络节点是无限传感器网络的核心问题.根据无线传感器网络的工作原理和节点体系结构,设计了以32位ARM7处理器LPC2103为核心,结合2.4 GHz无线收发器CC2420、存储器AT45DB041以及外围数字温度传感器构建的无线传感器节点.并给出了节点软件部分的设计流程.     

基于MEC的高速铁路无线通信网络优化方案

为实现对高速铁路无线通信网络的优化处理,满足高速铁路安全、可靠、高效运行的多维铁路运输需求,在分析现有高速铁路车地无线通信网络的基础上,结合目前在其他行业广泛应用和推广的MEC技术,提出了基于MEC的高速铁路无线通信网络优化方案。通过实验室搭建仿真环境,对比两种高速铁路无线通信网络的优化方案模型,并对基站和车站MEC服务器功能及MEC平台架构进行阐述,通过高速铁路应用实例,系统地描述基于MEC的无线通信网络优化方案,为后续高速铁路无线通信网络优化提供理论依据,对网络时延、无线传输优化、虚拟化技术等方面的研究和攻关提供模型支持。     

移动通信网络发展及其网络规划设计应对思考

简要论述了移动通信未来的发展趋势,介绍了5G的若干特点和关键技术。最后提出了面向未来网络规划设计的一些思考。     

集成电路设计中的IP设计与集成方法

在集成电路芯片设计中采用IP核(Intellectual Property Core)是IC设计进入SoC时代的必然选择,它可以达到提高设计效率、节省人力、满足及时上市的要求.重点阐述了IP的定义、分类、特征,国内外IP产业的发展状况以及IP的设计、验证、集成过程中的技术.     

汽车车身附件电控系统通信网络设计

针汽车车身附件电控系统的要求,通过将CAN与LIN总线结合,设计了基于OSEK COM规范的通信网络。首先,设计了OSEK COM和NM层,使应用层软件可以独立于底层硬件提供通信服务;接着,建立了CAN-LIN混合的总线网络结构,并以此为基础设计了软硬件系统,建立了基于CAN2.0A格式的通信协议;最后,文章选取了3个代表性较强的节点组成待测网络,对其控制和通信功能进行了验证。     

Wireless ultra-reliable and low-latency communication:key design analysis and challenge

The current fragmented ultra reliable and low latency communication (URLLC) research focusing on a certain point was overcome.From the perspective of panoramic view,starting from the application scenarios and requirements,the system architecture,key technologies and solutions of URLLC were analyzed and introduced.Then,the physical layer detection performance requirements,link adaptation,radio resource management,end-to-end diversity solutions and how to integrate with TSN (time sensitive network) were analyzed in depth,and possible candidates were discussed.It hopes to have a thorough and comprehensive understanding of the theoretical research and application of URLLC,and a clear understanding of its challenges,so as to play a key reference for researchers and engineers in the related fields.     

适合无线IC的封装

应用于无线领域的集成电路和其它元件，它们的封装设计正处于急剧变革之中。人们对于传输大量数据的需求越来越强烈，毫无止境；因此，元器件制造商也不得不不断地改进制造技术，并同时不断地降低成本。通信和数字计算技术方面所使用的集成电路技术，正在不断地向高频率，高速度发展。在目前阶段，限制这些无线零部件使用频率的原因，往往不在集成电路的芯片本身，而是由于其封装的寄生效应所造成的。封装的这些寄生效应(包括物理的，分—设计RF IC时，应该充分了解能够选用的封装布的，和电磁场的等方面)，损害了器件的频率响应，破坏了…