基于内部标签的综合接入系统输入输出调度方案

本文在介绍了综合业务接入系统的基本结构基础上 ,介绍了自治系统内部标签 (ILP)信令格式 ,提出了一种新的基于优先级的参数自适应轮循调度 (Priority -basedParameterAuto -adaptiveRound -robinScheduling)方案 ,以及该方案在基于ILP的综合接入系统I/O调度中的实现方法 ,并对几种调度方案的性能进行了实验比较     

一种基于优先级的综合接入系统自适应I/O调度方案

该文介绍了综合业务接入系统的基本结构,提出了一种新的基于优先级的参数自适应轮询I/O调度(Priority based parameter self adapting round-robin I/O scheduling)方案,给出了该方案在综合接入系统I/O调度中的实现方法,并对几种调度方案的性能进行了实验比较。     

免调度非正交多址接入技术及其系统性能

主要探讨免调度非正交多址接入(NOMA)技术及其系统性能。NOMA技术在实际应用中需要仔细研究并解决用户识别以及信道估计问题,尤其是在有碰撞的情况下。针对该问题,给出了相应的解决方案,以及系统级评估中的建模方法,并对基于预配置方式和随机选择方式的免调度多用户共享接入(MUSA)方案在实际系统中的性能表现进行了系统级仿真评估。仿真结果显示免调度MUSA方案具有明显的性能增益。     

无源光纤网PON的接入控制技术研究

分析了采用TDMA方案按固定信元封装组帧的ATM-PON系统的上行接入控制方案和基于千兆以太网的宽带无源光接入网(EthernetPON)的可变时隙TDMA动态带宽分配的接入控制方案。后一方案采用轮转调度(round-robinscheduling)的方式对各ONU进行轮询,依据它们各自缓冲区中预备发送的长度不定的数据发送请求,根据多用户接入和业务类型进行以太包调度,因此该方案能提供接入网的可扩展性以及ONU之间的统计复用,提高带宽利用率。文中提供了两种接入控制方案的流程,并着重对更具潜力的EPON系统的接入控制方案进行了详尽的分析和研究。     

CTC系统车站设备接入调度所方案比选

简要介绍了CTC系统和CTC系统原有接入方案,对新要求下原有接入方案存在的问题进行了分析。重点提出了四个改进的接入方案,并对四个方案的优缺点进行了比选分析,最终提出了CTC系统车站设备接入调度所的最佳接入方案,供工程设计中参考。     

主干光缆综合承载分析及建设策略

对现有业务光缆接入的方式进行分析，提出了地（市）汇聚区和综合业务接入区划分的思路，详细论述了县到乡主干光缆、城区调度光缆和城区主干光缆环的建设策略和方案优势。     

一种地铁综合监控集成闭路电视子系统的方案设计

根据视频监控系统(CCTV)的数据流特殊性,其接入综合监控系统的设计可以使用数据分流的方式,服务器处理数据量较少的控制数据,实时监控CCTV子系统的工作状态,调度工作站(综合监控系统客户端)承担多媒体数据的解码和显示工作。文章描述了目前综合监控厂商接入CCTV的常用办法及其局限性,提出了一种SVC三角平衡框架,具体描述了CCTV数据源、ISCS服务器以及ISCS客户端各种情况下详细的数据流向。     

基于NGN的矿用综合业务调度通信系统

针对推进我国三网合一以及完善煤矿通信系统的趋势,分析了现代煤矿调度通信系统的业务需求,提出了一种基于下一代网络技术的矿用综合业务调度通信系统,并构建了一个有效的系统模型。基于TDM和IP的多网融合调度平台,采用功能模块化的开发模式,设计并实现了行政电话、调度电话和IP语音接入等语音功能模块,为煤矿井上井下调度通信提供了一种可行方案。     

B3G/TDD系统中随机接入方案研究

提出了一种应用于B3G TDD系统的随机接入方案。该方案结合了媒体接入层的包调度和物理层的信号处理技术,可以有效地避免数据包的碰撞。分析比较和仿真表明,该方案较传统的时隙ALOHA随机接入方案在吞吐率和时延方面都有较大的改善。     

时变信道下基于有效容量的OFDMA系统资源分配方案

该文给出时变信道下多用户正交频分多址接入(OFDMA)系统的有效容量表达式。为了最大化系统平均有效容量,该文利用泰勒近似得到了渐近可达的多用户调度准则,根据用户移动速度、业务时延敏感特性和有效容量的关系调度用户。仿真结果表明,该方案能够更好地提高移动用户有效容量。     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks