ASON网络管理技术研究的新进展

本文主要介绍了在ASON网络管理研究方面的进展情况,主要包括ASON网络管理标准化进展、ASON管理平面体系、ASON管理功能定位和特征、ASON管理平面测试情况以及ASON网管系统建设需要考虑的问题等方面内容。     

ASON节点功能的实现

文章在阐述自动交换光网络(ASON)节点的功能和结构的基础上,从传送平面、控制平面和管理平面3个平面的角度说明了ASON节点功能的实现技术,并分析了ASON设备的演进策略.文章还介绍了中兴通讯最新研究开发出的ASON节点设备--ZXSM-S600.     

自动交换光网络管理平面技术

自动交换光网络(ASON)技术是当前光网络领域研究的热点技术，但是有关ASON管理平面的研究工作和标准化才刚刚起步。本根据下一代光网络向自动交换光网络发展的趋势．介绍了与之相适应的ASON管理平面技术。本阐述了管理平面在ASON体系结构中的作用。ASON网络管理技术的新特点，重点介绍了ASON网络管理的体系结构、管理功能需求以及管理平面的接口和协议，最后结合国内外有关ASON管理平面技术的研究进展。介绍了ASON管理平面的标准化现状和未来发展．     

ASON体系结构及存在的问题研究

介绍了自动交换光网络(ASON)--一种具有灵活性、高可扩展性的能直接在光层上按需提供服务的光网络的发展情况和技术特点,分析了ASON的体系结构,包括3个平面,3个接口、3种连接.最后指出了ASON在规范和应用中存在的问题.     

浅谈ASON控制平面及应用

从ASON的产生入手,阐述了ASON控制平面的理论及优势,介绍了ASON控制平面目前发展状况和存在问题,分析讨论了已建ASON的情况和存在问题,并对规划建设ASON提出了一些建议。     

基于GMPLS的ASON网络故障恢复研究

区别于传统光网络,ASON引入了控制平面进行网络管理控制。控制平面的引入提供了多种生存性方式,可以进行快速的故障恢复。主要研究了基于通用多标签协议（GMPLS）的ASON控制平面的网络恢复机制,分析了常用的恢复和保护策略。以恢复时间作为性能指标,对传统恢复方案和改进的恢复方案进行了分析,并对其网络恢复时间进行了仿真对比,指出各自的优缺点,提出了未来ASON网络中生存性的发展趋势。     

ASON控制平面技术及其仿真试验

介绍了ASON的体系结构、ASON控制平面功能、网络保护和恢复、控制平面协议及其控制平面仿真试验。     

ASON智能化网络管理技术

基于未来网络向ASON智能化方向发展的趋势,介绍了与之相适应的ASON网络管理技术,包括ASON管理平面在ASON体系结构中的位置和作用,以及ASON网络管理的特点,并对ASON管理平面的管理功能需求作了描述。     

基于ASON技术的电力通信网优化及应用

智能电网建设需要新一代智能通信技术做基石和保证,通过研究ASON技术特征及应用,并结合传统电力SDH/MSTP通信网的不足,指出了ASON必然成为电力通信系统发展的主流方向,在现有SDH/MSTP通信网的基础上引进ASON控制平面,承载ASON业务,完善网络拓扑结构,提升带宽利用率,提高核心业务的可靠性和安全性。     

ASON技术及其发展

介绍智能光网络的发展情况及其基本概念,ASON(自动交换光网络)与现有光传送网技术相比的特点及其优势,详细介绍ASON的传送平面、控制平面、管理平面三个组成平面,阐述了各自的特点和功能,ASON技术所支持的三种连接方式,最后对ASON技术的发展进行了展望。     

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.     

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.     

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.     

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