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Joint 48th IEEE Conference on Decision and Control and 28th Chinese Control Conference

作者： Xiaoxin Zhang Liang Chen Jianwei Huang Minghua Chen Yuping Zhao the State Key Laboratory of Advanced Optical Communication Systems & Networks School of Electronics Engineering and Computer SciencePeking University the Dept.of Information Engineering Chinese University of Hong Kong

Orthogonal frequency division multiplexing(OFDM) is the key component of many emerging broadband wireless access *** resource allocation in OFDM uplink,however,is challenging due to heterogeneity of users' quality of service requirements,channel conditions,and individual resource *** formulate the resource allocation problem as a non-strictly convex optimization problem,which typically has multiple global optimal *** propose a reduced primal-dual algorithm,which is distributed,requires simple local updates,and probably globally converges to a global optimal solution under easily satisfied sufficient technical *** performance of the algorithm is studied through a realistic OFDM simulator based on field *** with the previously proposed standard primal-dual algorithm,the reduced algorithm decreases the total number of iterations by 80%and the variance by 85%.

关键词： RPD Distributed and Optimal Reduced Primal-Dual Algorithm for Uplink OFDM Resource Allocation

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Fabrication of annular photonic crystals by atomic layer deposition and sacrificial etching

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Journal of Vacuum science and Technology B: Microelectronics and Nanometer Structures 2009年第2期27卷 568-572页

作者： Feng, Junbo Chen, Yao Blair, John Kurt, Hamza Hao, Ran Citrin, D.S. Summers, Christopher J. Zhou, Zhiping School of Optoelectronics Science and Engineering Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430074 China Department of Electronic Science and Technology Huazhong University of Science and Technology Wuhan Hubei 430074 China School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332-0245 United States Department of Electrical and Electronics Engineering TOBB University of Economics and Technology Ankara 06560 Turkey School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA 30332-0250 United States Unit Mixte Internationale 2958 Georgia Tech-CNRS Georgia Tech Lorraine 2 rue Marconi 57070 Metz France State Key Laboratory on Advanced Optical Communication Systems and Networks Peking University Beijing 100871 China

In this article, the fabrication process of annular photonic crystals on silicon-on-insulator wafers was addressed for the first time. A self-alignment procedure for nanofabrication using atomic layer deposition and sacrificial etching was established to place accurately nanosized dielectric rods in nanosized circular air holes. Avoiding the challenging electron-beam lithography alignment, this method achieves atomic level precision and shows high stability. © 2009 American Vacuum Society.

关键词： Atomic layer deposition

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On the need for bidirectional coupling of road traffic microsimulation and network simulation

On the need for bidirectional coupling of road traffic micro...

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1st ACM SIGMOBILE Workshop on Mobility Models 2008, Models'08

作者： Somm, Christoph Yao, Zheng German, Reinhard Dressler, Falko Computer Networks and Communication Systems Department of Computer Science University of Erlangen Germany

ISBN: (纸本)9781605581118

Simulation of network protocol behavior in Vehicular Ad Hoc Network (VANET) scenarios is strongly demanded for evaluating the applicability of developed network protocols. In this work, we discuss the need for bidirectional coupling of network simulation and road traffic microsimulation for evaluating such protocols. The implemented mobility model, which defines all movement of nodes, influences the outcome of simulations to a great deal. Therefore, the use of a representative mobility model is essential for producing meaningful results. Based on these observations, we developed the hybrid simulation framework Veins (Vehicles in Network Simulation), composed of the network simulator OMNeT++ and the road traffic simulator SUMO. Based on a proof-of-concept study, we demonstrate the advantages and the need for bidirectionally coupled simulation. Copyright 2008 ACM.

关键词： Vehicular ad hoc networks

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Molecular communication: biological communications technology

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Journal of the National Institute of Information and communications Technology 2008年第4期55卷 75-93页

作者： Tadashi, Nakano Moore, Michael Akihiro, Enomoto Tatsuya, Suda Department of Computer Science University of California Irvine United States Internet Technology Molecular Communication Australia Computer Systems and Networking Design and Development of Communication Systems Using Biological Molecules United States Distributed Systems Sensor Networks Molecular Communication Germany

This article provides a comprehensive overview of state-of-the art research on molecular communication-a molecule-based communication paradigm for biological machines. Unlike current telecommunications based on electric or optical signals, molecular communication exploits biological molecules as information carriers. In molecular communication, senders of communication encode information onto molecules and transmit to the environment. The information coded molecules then propagate in the environment to reach receivers of communication, which capture and biochemically react to the molecules (i.e., decode the information from the information carrying molecules). Since biological molecules are compatible with biological systems, molecular communication is expected to impact medical domains such as human health monitoring where implant biological machines interact with biological cells through molecular communication. This article describes key concepts, architecture, potential applications of molecular communication as well as existing research on engineering molecular communication components and systems.

关键词： Molecules

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Loss temporal dependency characteristic inference in wireless sensor network

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Journal of Computational Information systems 2008年第5期4卷 2303-2308页

作者： Li, Yongjun Ji, Wenli Dai, Yafei Computer Networks and Distributed Systems Laboratory Peking University Beijing 100871 China School of Computer Science Northwestern Polytechnical University Xi'an 710072 China School of Communication Engineering Xi'an University of Science and Technology Xi'an 710075 China State Key Lab. for Adv. Opt. Commun Syst and Networks Beijing 1000871 China

The internal link loss characteristic inference has become an increasingly important issue for operating and evaluating a wireless sensor network. Due to the inherent stringent bandwidth and energy constraints, it is usually impractical to directly collect link loss statistical data from each node in sensor network. Here we consider the problem of inferring the internal link loss characteristics from end-to-end measurement. We use the Gilbert error model to model the sensor link losses, formulate the problem of link loss characteristics estimation as a Bayesian inference problem, and propose a Markov Chain Monte Carlo (MCMC) algorithm to solve it. The simulation shows that the link loss performance parameters can be inferred accurately, and the proposed algorithm scales well according to the sensor network size. © 2008 Binary Information Press.

关键词： Inference engines

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Loss cumulate generating function inference and application in wireless sensor network

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Journal of Computational Information systems 2008年第4期4卷 1399-1407页

The internal link loss characteristic inference has become an increasingly important issue for operating and evaluating a wireless sensor network. Due to the inherent stringent bandwidth and energy constraints of sensors, it is usually impractical to directly monitor each node or link in wireless sensor network. We consider the problem of inferring the internal link loss characteristics from passive end-to-end measurement in this paper. Specifically, the link loss performance inference during the data aggregation is considered. Under the assumptions that the link losses are mutually independent, we elaborate a bias corrected link loss Cumulant Generating Function (CGF) algorithm. The simulation results show that the internal link loss CGF can be inferred accurately comparable to the sampled internal link loss CGF. At the end of this paper, we apply the result of internal link loss CGF inference to identify the lossy link in sensor network.

关键词： Sensor nodes

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A novel link architecture for optical burst switched networks

A novel link architecture for optical burst switched network...

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Network Architectures, Management, and Applications VI

作者： Chi, Yuan Zhengbin, Li Anshi, Xu State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Peking University Beijing China

ISBN: (纸本)9780819473776

Optical burst switching (OBS) is proposed as a high speed, flexible and transparent switching technology. It facilitates the efficient integration of both IP and WDM. And it provides statistical multiplexing gains and avoids long end to end setup time of traditional virtual circuit configuration. However, under the current and foreseeable limitations of optical technology, performance of OBS networks is mainly hampered at the network nodes by resource contention. Due to the fact that the random access memory is not available in the optical domain, there exists a real possibility that bursts may contend with one another at a switching node. Therefore, many contention resolutions are proposed, such as fiber delay lines, wavelength conversion, and deflection routing, etc. These resolutions are focus on the node design. They are increase the complexity of the node. But they can not always take some significant effect and make notable gains in cost-efficiency. In this paper, unlike these schemes are focus on the node design, we proposed a novel link architecture named dual-fiber-link (DFL) for OBS networks. We also proposed a relative media access control protocol. We have developed some scenarios to evaluate this architecture. Simulation results show that the proposed link can decrease packet drop probability in terms of orders of magnitude in OBS networks without optical buffers and wavelength conversions. © 2008 SPIE.

关键词： Quality of service

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Digital post-equalization of intrachannel nonlinearities in coherent DQPSK transmission systems

Digital post-equalization of intrachannel nonlinearities in ...

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Coherent Optical Technologies and Applications, COTA 2008

作者： Gao, Yan Zhang, Fan Dou, Liang Chen, Zhangyuan Xu, Anshi State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Peking University Beijing 100871 China

Digital post-equalization of intrachannel nonlinearities in coherent DQPSK systems is numerically studied. The simulation results show that the simplified channel inversion method is efficient in simultaneous compensa... 详细信息

关键词： Chromatic dispersion

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Phase shift of plasmons excited by slits in a metal film illuminated by oblique incident TM plane wave

Phase shift of plasmons excited by slits in a metal film ill...

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Optoelectronic Materials and Devices III

作者： Li, Guangyuan Xu, Anshi State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Peking University Beijing 100871 China

The interactions between the optical light and sub-wavelength structures in metal film have sparked great interest on surface plasmon polaritons (SPPs). One effective way to interpret these phenomena is to make use of the phase shift between the SPP excited and the incident wave. Many theoretical and experimental studies have shown that this shift approximate to π is intrinsic at normal incidence. In this paper, the phase shift at oblique incidence is analyzed and used to interpret the transmission effect for the first time to our knowledge. A simplified 2D scattering formulation using vector finite element method is set up. Simulations show the phase shift can be approximate to π over a large range of incidence angles. With this shift, the conditions for the enhanced or suppressed transmission and the corresponding destructive or constructive interference of SPPs at oblique incidence are achieved. The transmission effect for incidence angle not satisfying these conditions, as well as its potential applications is also discussed. © 2008 SPIE.

关键词： Finite element method

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Tunable Omnidirectional Surface Plasmon Resonance in Cylindrical Plasmonic Structure

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Chinese Physics Letters 2008年第12期25卷 4388-4390页

作者：汪毅王冰周治平 Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430074 State Key Laboratory on Advanced Optical Communication Systems and Networks Peking University Beijing 100871 School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta Georgia 30332 USA

The tunable omnidirectional surface plasmon resonance in the optical range is theoretically demonstrated in a cylindrical plasmonic crystal by using rigorous coupled-wave analysis. The cylindrical plasmonic crystal consists of an infinite chain of two-dimensional cylindrical metal-dlielectric-dielectric-metal structures. The dispersion relation of the cylindrical plasmonic crystal is obtained by calculating the absorptance as a function of a TM- polarized incident plane wave and its in-plane wave vector. The omnidirectional surface plasmon resonance can be tuned from UV region to visible region by adjusting the thickness of the cylindrical dielectric layers. The absorption spectrum of the infinite chain of nanocylinders is also investigated for comparison.

关键词： field emission molybdenum dioxide enhancement factor

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