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International Conference on Computational Intelligence and Security

作者： Zhao, Xiaohui Pang, Liaojun Bi, Jingjuan Pei, Qingqi Li, Huixian Key Lab of Computer Networks and Information Security of Ministry of Education Xidian University Xi'an 710071 China Department of Computer Science and Engineering Northwestern Polytechnical University Xi'an 710072 China

ISBN: (纸本)9780769542973

In order to solve the problems in wireless sensor networks, such as node failure and losing of master key, a secure communication model based on secret sharing in wireless sensor networks is presented in this paper. In this model, with the secret sharing mechanism, the master key is divided into n parts which are distributed to the council nodes. Accordingly the council nodes can protect the master key, distribute keys to the nodes in the domain, periodically monitor the key node to avoid failure and improve the date output rate. © 2010 IEEE.

关键词： Sensor nodes

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Traffic prediction-based routing algorithm over structured P2P networks

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Journal of China Universities of Posts and Telecommunications 2011年第SUPPL. 1期18卷 23-27页

作者： Li, Zhi-Yuan Wang, Ru-Chuan Han, Zhi-Jie Bi, Jun-Lei Han, Chong College of Computer Nanjing University of Posts and Telecommunications Nanjing 210003 China High Technology Research Key Lab of Wireless Sensor Networks Nanjing 210003 China Institute of Computer Nanjing University of Posts and Telecommunications Nanjing 210003 China Department of Computer Engineering Henan Polytechnic Institute Nanyang 473009 China

Routing has always been a great challenge for structured Peer-to-Peer (P2P) networks. There are a lot of representative structured routing algorithms for P2P networks, but these algorithms do not guarantee the quality of service (QoS) for real-time P2P applications. Addressing this challenge, a traffic prediction-based structured routing algorithm over P2P networks (TPSR) is proposed. Our contributions are described as below. We firstly analyze P2P traffic features and then build a wavelet neural-network predicting model. Secondly, we employ the traffic prediction model to predict the future state of each peer, such as normal or congestion, and let each peer update its routing table. In this way the requesting peers always get a resource list which contains the best resource peers. Simulation results demonstrate that TPSR has higher transmission success rate and lower end to end delay than other structured routing algorithms. Thus, TPSR can guarantee the QoS for real-time P2P applications. © 2011 The Journal of China Universities of Posts and Telecommunications.

关键词： Quality of service

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XPM statistics in 100% pre-compensated WDM transmission for different modulation formats and transmission fibres

XPM statistics in 100% pre-compensated WDM transmission for ...

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2009 14th OptoElectronics and Communications Conference, OECC 2009

作者： Fan, Zhang State Key Lab. of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Peking University Beijing 100871 China

XPM statistics in 100% pre-compensated WDM transmission depends on bit rates, transmission fibres and modulation formats. XPM in DPSK systems shows much less stochastic than that in OOK systems. © 2009 IEEE.

ISBN: (纸本)9781424441037

关键词： Stochastic systems

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Conflict Resolution Strategy in Handover Management for 4G and 5G networks

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computers, Materials & Continua 2022年第9期72卷 5215-5232页

作者： Abdulraqeb Alhammadi Wan Haslina Hassan Ayman A.El-Saleh Ibraheem Shayea Hafizal Mohamad Yousef Ibrahim Daradkeh Communication Systems and Networks Research Lab Malaysia-Japan International Institute of TechnologyUniversiti Teknologi Malaysia54100Kuala LumpurMalaysia College of Engineering A’sharqiyah University(ASU)Ibra400Oman Department of Electronics and Communication Engineering Faculty of Electrical and Electronics EngineeringIstanbul Technical University(ITU)Istanbul34467Turke Faculty of Engineering and Built Environment Universiti Sains Islam MalaysiaBandar Baru Nilai71800Malaysia Department of Computer Engineering and Networks College of Engineering at Wadi AddawasirPrince Sattam Bin Abdulaziz UniversityAl Kharj11991KSA

Fifth-generation(5G)cellular networks offer high transmission rates in dense urban ***,a massive deployment of small cells will be required to provide wide-area coverage,which leads to an increase in the number of handovers(HOs).Mobility management is an important issue that requires considerable attention in heterogeneous networks,where 5G ultra-dense small cells coexist with current fourth-generation(4G)*** mobility robustness optimization(MRO)and load balancing optimization(LBO)functions have been introduced in the 3GPP standard to address HO problems,non-robust and nonoptimal algorithms for selecting appropriate HO control parameters(HCPs)still exist,and an optimal solution is subjected to compromise between LBO and MRO ***,HO decision algorithms become *** paper proposes a conflict resolution technique to address the contradiction between MRO and LBO *** proposed technique exploits received signal reference power(RSRP),cell load and user speed to adapt HO margin(HM)and time to trigger(TTT).Estimated HM and TTT depend on a weighting function and HO type which is represented by user status during *** proposed technique is validated with other existing algorithms from the *** results demonstrate that the proposed technique outperforms existing algorithms overall performance *** proposed technique reduces the overall average HO ping-pong probability,HO failure rate and interruption time by more than 90%,46%and 58%,respectively,compared with the other schemes overall speed scenarios and simulation time.

关键词： Mobility management handover 5G heterogeneous networks

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Generation and transmission of 86 Gbit/s hybrid polarization-division multiplexed OOK/DPSK signal

Generation and transmission of 86 Gbit/s hybrid polarization...

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Optical Transmission, Switching, and Subsystems VI

作者： Wu, Lin Li, Mingjin Luo, Yazhi Zhang, Fan Chen, Zhangyuan Xu, Anshi State Key Lab. of Advanced Optical Communication Systems and Networks School of Electronic Engineering and Computer Science Peking University Beijing 100871 China

86 Gbit/s hybrid polarization multiplexed OOK/DPSK signal is generated and transmitted at the same wavelength. Clear eye diagrams of demultiplexed OOK and DPSK signals are obtained after transmission over a 106.5 km S... 详细信息

关键词： Amplitude shift keying

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Automated Pollen Detection with an Affordable Technology

Automated Pollen Detection with an Affordable Technology

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2020 International Conference on Embedded Wireless Systems and networks, EWSN 2020

作者： Cao, Nam Meyer, Matthias Thiele, Lothar Saukh, Olga Institute of Technical Informatics Graz University of Technology Austria Computer Engineering and Networks Lab ETH Zurich Switzerland Complexity Science Hub Vienna Austria

ISBN: (纸本)9780994988645

Airborne pollen cause seasonal allergies and the number of people affected increases yearly due to global warming and urbanization. Governmental pollen sensing stations are sampling traps which require manual pollen identification and counting by trained personnel in the lab. In the past years, a number of researchers and startups started working towards automated pollen measurements by exploring a wide range of techniques. Many solutions reported in the literature are expensive or work for a limited number of pollen species. In this paper, we present the design of a prototype of an automated and affordable pollen detection device built from off-the-shelf components. The design consists of three subsystems operating in the field and communicating the data to the backend server: (1) a particle trap with automatic filtering, (2) a particle concentration subsystem, and (3) a digital transmitted light microscope with layer-wise focus. The prototype shows effective particle gathering, filtering and concentration in a tiny-sized area. As a result, we reduce particle loss and improve image quality taken by the optical system when searching and focusing on pollen grains. The test results show that our device achieves high efficiency with up to 150 l/min air flow rates, evaluates over 90% of captured pollen grains, and achieves 1 h measurement delay on average (2 h at maximum). The prototype collects raw time-stamped microscopic images of pollen with 5-60 depth layers per sample depending on the number of objects contained in one sample. All images are transmitted to the backend server where we run a pollen detection algorithm to extract individual pollen grains from every image. We achieve 0.90 average precision and F1-score of 0.88 when detecting pollen in the images of individual layers taken in the field. Our prototype successfully operated in the wild for 115 days between April and August 2019, and shows high stability under a wide range of varying weather conditions, l

关键词： Global warming

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Design and implementation of a SHARC digital signal processor core in Verilog HDL 7

Design and implementation of a SHARC digital signal processo...

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7th IEEE International Multi Topic Conference, INMIC 2003

作者： Mozaffar, N. Azeemi, N.Z. Department of Hardware Streaming Networks Pvt. Ltd. Islamabad Pakistan Department of Computer Engineering VLSI Lab. CIIT Islamabad Pakistan

ISBN: (纸本)0780381831

This work describes the design and implementation of an 8-bit fixed point digital signal processor core in Verilog HDL. The architecture exploits the principles of pipelining and parallelism in order to obtain high speed and throughput. The modules of the design fit on a Xilinx XC4010XL FPGA with 130 K gates running at a clock frequency of 32.31 MHz. The proposed architecture follows the Analog Devices SHARC® (super Harvard architecture) DSP standard. This DSP architecture balances a high performance processor core with high performance buses, program memory (PM) and data memory (DM). In the core, every instruction can execute in a single cycle. The buses and instruction cache provide rapid, unimpeded dataflow to the core to maintain the execution rate. © 2003 IEEE.

关键词： Field programmable gate arrays (FPGA)

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EvAnT: Analysis and checking of event traces for wireless sensor networks

EvAnT: Analysis and checking of event traces for wireless se...

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2008 IEEE International Conference on Sensor networks, Ubiquitous, and Trustworthy Computing, SUTC 2008

作者： Woehrle, Matthias Plessl, Christian Lim, Roman Beutel, Jan Thiele, Lothar ETH Zurich Computer Engineering and Networks Lab. 8092 Zurich Switzerland University of Paderborn Paderborn Center for Parallel Computing 33102 Paderborn Germany

ISBN: (纸本)9780769531588

Testing and verification methodologies for Wireless Sensor networks (WSN) systems in pre-deployment are vital for a successful deployment. Increased visibility of the internal state of a WSN application is established by instrumenting the application for logging execution traces at runtime. While the interpretation of the event traces is application-specific, a common method for analysis can be devised. This method should allow for a concise formulation of explorative queries to determine the occurrence and the cause of functional or performance problems. The contribution of this paper is an event analysis methodology that is implemented in the EvAnT framework. EvAnT allows for specifying queries that are executed on the collected traces. EvAnT is specifically tailored to WSN testing and debugging. We demonstrate the applicability of EvAnT by a case study in a building monitoring project. © 2008 IEEE.

关键词： Wireless sensor networks

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Performance analysis of the affine projection CM algorithm

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Journal of Information and Computational Science 2011年第14期8卷 3275-3280页

作者： Ma, Lili Chen, Jinguang Wang, Huiran School of Computer Science Xi'an Polytechnic University Xi'an 710048 China School of Electronic Engineering Xidian University Xi'an 710071 China Science and Technology on Information Transmission and Dissemination in Communication Networks Lab. Shijiazhuang 050081 China

In this paper, we discuss the performance of the affine projection CM algorithm, which can deal with the cases that the input signals are correlated and decrease the filtering error. We describe the derivation of algorithm process and analysis the error performance and computational complexity. And an example of adaptive blind equalization is given to verify this algorithm. Some conclusions are obtained which are benefit to the researchers and engineers in the adaptive filtering field. 1548-7741/Copyright © 2011 Binary Information Press December 2011.

关键词： Adaptive filters

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Secure password authentication for keystroke dynamics

Secure password authentication for keystroke dynamics

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9th International Conference on Knowledge-Based Intelligent Information and engineering Systems, KES 2005

作者： Choe, YeongGeun Kim, Soon-Ja Graduate School of Electronic Engineering Computer Networks Lab. Kyungpook National University 1370 Sankyuk-dong Buk-gu Daegu Korea Republic of

ISBN: (纸本)3540288961

Keystroke dynamics is an intelligent data processing technique of analyzing the user's habitual typing patterns to identify him. Keystroke dynamics combined with password authentication has been widely used as a means to enhance user authentication system. However, the user authentication system's security does not rely solely on the keystroke dynamics. To guarantee a high level of security, more secure password authentication is needed. The design and development of a secure password authentication protocol for keystroke dynamics is discussed in this paper. We propose a new efficient password authentication protocol that is secure against all types of attacks considered in the paper. We also show that our two-party protocol is extended to a three-party protocol, where each user only shares a password with a trusted server. As a result, our protocols with keystroke dynamics can provide a secure and intelligent means of authentication and access control of computer users. © Springer-Verlag Berlin Heidelberg 2005.

关键词： Security of data

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