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IEEE Vehicular Networking Conference (VNC)

作者： David Eckhoff Alexander Brummer Christoph Sommer Computer Networks and Communication Systems University of Erlangen Germany Dept. of Computer Science Paderborn University Germany

ISBN: (纸本)9781509051984

Although the level of realism in vehicular network simulation is constantly increasing, antenna radiation patterns have only rarely entered the picture. In this paper we investigate the impact of these antenna patterns on the outcome of a city-wide simulation with hundreds of cars as well as an isolated intersection collision avoidance scenario. We show that in both cases pronounced differences can be observed: Compared to idealistic isotropic antennas, using realistic antennas changes the distribution of angle of arrival, affecting network topology dynamics. In collision avoidance applications, the antenna radiation pattern can make the difference between a crash and a successful emergency brake, strongly indicating that antenna characteristics should find more consideration in vehicular network simulation.

关键词： Antenna radiation patterns Vehicles Receiving antennas Safety Computational modeling Antenna measurements

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Index modulation for 5G: Striving to do more with less

arXiv

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arXiv 2017年

作者： Cheng, Xiang Zhang, Meng Wen, Miaowen Yang, Liuqing State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics and Computer Science Peking University Beijing100871 China State Key Laboratory of Integrated Services Networks Xidian University Xi'an710000 China China Telecom Technology Innovation Center Beijing102209 China School of Electronic and Information Engineering South China University of Technology Guangzhou510640 China Department of Electrical and Computer Engineering Colorado State University Fort CollinsCO80523 United States

The fifth generation (5G) wireless communications brag both high spectrum efficiency and high energy efficiency. To meet the requirements, various new techniques have been proposed. Among these, the recently-emerging index modulation has attracted significant interests. By judiciously activating a subset of certain communication building blocks, such as antenna, subcarrier and time slot, index modulation is claimed to have the potential to meet the challenging 5G needs. In this article, we will discuss index modulation and its general and specific representations, enhancements, and potential applications in various 5G scenarios. The objective is to reveal whether, and how, index modulation may strive for more performance gains with less medium resource occupation. Copyright © 2017, The Authors. All rights reserved.

关键词： Orthogonal frequency division multiplexing

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Jitter floor elimination for blind feedforward/feedback symbol-timing recovery exploiting the extended zero-crossing property

Jitter floor elimination for blind feedforward/feedback symb...

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作者： Gappmair, Wilfried Cioni, Stefano Corazza, Giovanni E. Koudelka, Otto Institute of Communication Networks and Satellite Communications Graz University of Technology Graz Austria European Space Agency ESA/ESTEC Noordwijk Noordwijk Netherlands Department of Electronics Computer Science and Systems University of Bologna Bologna Italy

Carrier-blind and non-data-aided recovery of the symbol timing is of paramount importance in digital receivers, that is, detailed knowledge about carrier frequency and phase or any pilot sequence is not necessary for proper operation. In this context, feedforward algorithms are particularly helpful in packet-oriented systems, where rapid and stable acquisition of the major transmission parameters is essential for subsequent processing stages. On the other hand, feedback algorithms are typically used to track small deviations from the stable equilibrium point. In the current paper, we propose a new approach for blind feedforward and feedback recovery of the symbol timing, which needs just one or two samples per symbol. The method is characterized by a second filter operated in parallel to the receiver-matched filter. Under Nyquist conditions, exemplified by baseband pulses having a square-root raised cosine spectrum, this filter exhibits an impulse response satisfying the extended zero-crossing property, that is, it vanishes for all integer multiples of the symbol period including the origin. Using this idea for symbol-timing recovery, it is shown that the annoying jitter floor – typical for most timing recovery schemes and caused by inter-symbol interference – can be avoided irrespective of the selected modulation scheme. Copyright © 2015 John Wiley & Sons, Ltd. Copyright © 2015 John Wiley & Sons, Ltd.

关键词： Floors

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Distributed relay selection for heterogeneous UAV communication networks using a many-to-many matching game without substitutability

arXiv

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arXiv 2017年

作者： Liu, Dianxiong Xu, Yuhua Xu, Yitao Wu, Qihui Jing, Jianjun Zhang, Yuanhui Anpalagan, Alagan College of Communications Engineering PLA Army Engineering University Nanjing China Science and Technology on Communication Networks Laboratory Shijiazhuang China College of Electronic and Information Engineer Nanjing University of Aeronautics and Astronautics Nanjing China PLA Zhenjiang Watercraft College China Department of Electrical and Computer Engineering Ryerson University Toronto Canada

—This paper proposes a distributed multiple relay selection scheme to maximize the satisfaction experiences of unmanned aerial vehicles (UAV) communication networks. The multi-radio and multi-channel (MRMC) UAV communication system is considered in this paper. One source UAV can select one or more relay radios, and each relay radio can be shared by multiple source UAVs equally. Without the center controller, source UAVs with heterogeneous requirements compete for channels dominated by relay radios. In order to optimize the global satisfaction performance, we model the UAV communication network as a many-to-many matching market without substitutability. We design a potential matching approach to address the optimization problem, in which the optimizing of local matching process will lead to the improvement of global matching results. Simulation results show that the proposed distributed matching approach yields good matching performance of satisfaction, which is close to the global optimum result. Moreover, the many-to-many potential matching approach outperforms existing schemes sufficiently in terms of global satisfaction within a reasonable convergence time. Copyright © 2017, The Authors. All rights reserved.

关键词： Unmanned aerial vehicles (UAV)

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Research and implementation of cache node backup strategy in distributed caching system 2nd

Research and implementation of cache node backup strategy in...

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2nd International Conference on Human Centered Computing, HCC 2016

作者： Liu, Wenlin Zhang, Haiyang Xu, Saihong Ma, Yue Sun, Siyuan School of Computer Science Beijing University of Posts and Telecommunications Beijing100876 China Science and Technology on Information Transmission and Dissemination in Communication Networks Laboratory Beijing China Beijing Branch China United Network Communications Group Co. Ltd Beijing China

ISBN: (纸本)9783319318530

This paper studies the mutual backup strategy of cache nodes in the distributed caching system, and proposes a new dynamic adaptive mutual backup strategy for the cache nodes by analyzing the specific application scenarios and requirements. Experimental results show that the proposed method supports the hot switch of the distributed caching system, can improve the availability and scalability of the system, and realize the functions of load balance and fault tolerance of the system. © Springer International Publishing Switzerland 2016.

关键词： Fault tolerance

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Power-Aware Lightpath Management for SDN-Based Elastic Optical networks

Power-Aware Lightpath Management for SDN-Based Elastic Optic...

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International Conference on computer communication and networks

作者： Yu Xiong Jin Shi Yi Lv George N. Rouskas Key Laboratory of Optical Communication and Networks Chongqing University of Posts and Telecommunications Chongqing China Department of Computer Science North Carolina State University Raleigh NC USA

Elastic optical networks (EONs) are considered as the most promising technology for interconnecting data centers. With the rapid growth of inter-datacenter traffic, power consumption of EONs becomes a significant challenge. In this work, we present a lightpath management algorithm that uses traffic prediction techniques to eliminate unnecessary lightpath termination and re-establishment so as to decrease switching power and enhance the energy efficiency of the network. Our algorithm builds upon the centralized control and capabilities of software defined networking (SDN) technology. Numerical results show that the proposed algorithm is effective in achieving substantial savings in power consumption while maintaining a bandwidth blocking ratio at levels comparable to those of earlier algorithms.

关键词： results proposed interconnecting

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Efficient test case derivation from statecharts-based models 11

Efficient test case derivation from statecharts-based models

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11th International Network Conference, INC 2016

作者： Wacht, Patrick Trick, Ulrich Fuhrmann, Woldemar Ghita, Bogdan Research Group for Telecommunication Networks Frankfurt University of Applied Sciences Frankfurt Germany Department of Computer Science University of Applied Sciences Darmstadt Darmstadt Germany Centre for Security Communication and Network Research Plymouth University Plymouth United Kingdom

This paper presents important aspects of a novel framework for the automated functional testing of value-added telecommunication services. Besides the introduction of a new approach to model the potential behaviour of... 详细信息

ISBN: (纸本)9781841024103

关键词： Telecommunication services

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Considering Pigeons for Carrying Delay Tolerant Networking Based Internet Traffic in Developing Countries

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THE ELECTRONIC JOURNAL OF INFORMATION SYSTEMS IN DEVELOPING COUNTRIES 2017年第1期54卷

作者： Jeremiah Scholl Anders Lindgren Health Informatics Centre Karolinska Institutet Sweden Communication Networks and Systems Lab Swedish Institute of Computer Science Sweden

There are many regions in the developing world that suffer from poor infrastructure and lack of connection to the Internet and Public Switched Telephone networks (PSTN). Delay Tolerant Networking (DTN) is a technology that has been advocated for providing store-and-forward network connectivity in these regions over the past few years. DTN often relies on human mobility in one form or another to support transportation of DTN data. This presents a socio-technical problem related to organizing how the data should be transported. In some situations the demand for DTN traffic can exceed that which is possible to support with human mobility, so alternative mechanisms are needed. In this paper we propose using live carrier pigeons (columba livia) to transport DTN data. Carrier pigeons have been used for transporting packets of information for a long time, but have not yet been seriously considered for transporting DTN traffic. We provide arguements that this mode of DTN data transport provides promise, and should receive attention from research and development projects. We provide an overview of pigeon characteristics to analyze the feasibility of using them for data transport, and present simulations of a DTN network that utilizes pigeon transport in order to provide an initial investigation into expected performance characteristics.

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Smart and Connected e-Health Lab for Standards Validation and Conformance

Smart and Connected e-Health Lab for Standards Validation an...

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International Conference on Computing, Networking and communications

作者： W. Liu U. Krieger E. K. Park S. S. Zhu School of Science & Technology Georgia Gwinnett College Computer Science in Communication and Networks University of Bamberg VP for Research and Dean of Graduate Studies Department of Computer Science Shantou University

ISBN: (纸本)9781467385800

This paper reports our innovation in a Smart and Connected e-Health Service (SCeHS) lab approach for e-Health standards validation. The lab platform has been designed for SCeHS which is a next generation solution following the initial Big Data e-Health Service (BDeHS) initiative. After a number of e-Health standards are summarized, we present our validation designs for conformance to those e-Health standards.

关键词： Smart-and-Connected e-Health E-Health Lab Platform E-Health Services Flow Validation E-Health Standards Conformance

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Comparative analysis of routing protocols for wireless mesh networks

Comparative analysis of routing protocols for wireless mesh ...

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International Symposium on communication Systems, networks and Digital Signal Processing, CNSDSP

作者： Maciej Piechowiak Piotr Zwierzykowski Piotr Owczarek Michał Wasłowicz Kazimierz Wielki University Institute of Mechanics and Computer Science Bydgoszcz Poland Chair of Communication and Computer Networks Poznan University of Technology Poznan Poland

The article considers the efficiency of routing protocols for wireless mesh networks. Routing protocols are crucial element for performance of mesh networks, they ensure even flow of data packets and reduce negative influence of interferences. The article contains an overview of routing protocols used in the network mesh. As part of the research includes a comparative analysis of representative routing protocols carried out in the OMNeT++ environment. Results of simulation has been presented and compared.

关键词： Routing protocols Routing Wireless mesh networks Mesh networks Delays Energy consumption

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