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Investigation of Angle Dependent Errors in Phase-based Ranging with Different Antennas 20

Investigation of Angle Dependent Errors in Phase-based Rangi...

引用

Proceedings of the 2020 International Conference on Embedded Wireless systems and networks

作者： Yannic Schröder Til Koke Christoph Thomas Lars Wolf Institute of Operating Systems and Computer Networks

ISBN: (纸本)9780994988645

Antenna orientation is an often overlooked factor in radiobased localization. Our experience with phase-based ranging suggests that antenna orientation has an impact on measured distances. Therefore, we investigate the impact of antenna orientation on phase-based ranging in the 2.4 GHz ISM band. Four different antenna types are tested in an anechoic chamber. Our evaluation is conducted end-to-end; we do not compare antenna properties by measuring parameters via a vector network analyzer but compare the measured distance between two wireless sensor nodes. Our evaluation shows that some antenna types report varying distance results at different rotation angles while other types are hardly influenced at all.

关键词： Phase-based Ranging IEEE 802.15.4, Active Reflector

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Analysis of Vulnerable Road User Awareness Message Generation Rules for Pedelecs 15

Analysis of Vulnerable Road User Awareness Message Generatio...

引用

15th IEEE Vehicular Networking Conference, VNC 2024

作者： Ostendorf, Nico Garlichs, Keno Wolf, Lars C. Robert Bosch GmbH Corporate Research Hildesheim Germany Institute of Operating Systems and Computer Networks Technische Universität Braunschweig Braunschweig Germany

ISBN: (纸本)9798350362701

Vehicle-To-X communication is increasingly focusing on vulnerable road users. A large group of vulnerable road users are pedelecs. In Vehicle-To-X communication, message generation rules play an important role. These rules can strongly influence the number of messages and the safety. This paper provides an overview of the current Vulnerable Road User Awareness Message generation rules and their impact based on a real pedelec data set. It also evaluates the importance of the rules and the frequency of message generation. All analyses are performed on data sets with different sample rates in order to get an overview of the impact of the sample rate. The results of this paper show that different sample rates lead to significant differences in the impact of the generation rules and also on the message generation frequency. Also a suggestion of a minimum sample rate for recording the sensor data of pedelecs is done. The importance of the different generation rules is measured with the help of an information loss metric. The loss of information caused by ignoring a rule varies significantly among the different rules. This loss also depends on the sample rate. Overall, this paper shows the current state of the generation rules, the different importance of each rule and a suggestion for a minimal sample rate. © 2024 IEEE.

关键词： Roads and streets

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The GAL middleware platform for AAL: A Case Study

The GAL middleware platform for AAL: A Case Study

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12th IEEE International Conference on e-Health Networking, Application and Services, Healthcom 2010

作者： Eichelberg, Marco Rein, Andreas Blisching, Felix Wolf, Lars R and D Division Health OFFIS -Institute for Information Technology Oldenburg Germany Institute of Operating Systems and Computer Networks Technische Universität Braunschweig Braunschweig Germany

ISBN: (纸本)9781424463749

GAL, the Lower Saxony Research Network Design of Environments for Ageing, investigates how information and communication technology can provide for better environments for ageing. This paper describes a service oriented middleware platform for Ambient Assisted Living and its use in a number of different assistive systems developed in the GAL project: personal activity and household assistant, monitoring of preventive and rehabilitation sports, sensor-based activity determination, and sensor-based fall prevention and recognition. Besides a detailed description of the middleware platform and its elements and interfaces, central infrastructure services and their particularly applications in the different use cases are presented. © 2010 IEEE.

关键词： Middleware

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RoadGraph - Graph based environmental modelling and function independent situation analysis for driver assistance systems

RoadGraph - Graph based environmental modelling and function...

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International IEEE Conference on Intelligent Transportation systems

作者： Knaup, Jörn Homeier, Kai Group Research for Driver Assistance and Integrated Safety of Volkswagen AG Germany Institute of Operating Systems and Computer Networks Technische Universität Braunschweig Germany

ISBN: (纸本)9781424476572

RoadGraph is a graph based environmental model for driver assistance systems. It integrates information from different sources like digital maps, onboard sensors and V2X communication into one single model about vehicle's environment. At the moment of information aggregation some function independent situation analysis is done. In this paper the concept of the RoadGraph is described in detail and first results are shown. ©2010 IEEE.

关键词： Graphic methods

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Poster Abstract: HeartBeat the Odds – A Novel Digital Ballistocardiographic Sensor System 15

Poster Abstract: HeartBeat the Odds – A Novel Digital Balli...

引用

15th ACM Conference on Embedded Networked Sensor systems, SenSys 2017

作者： Jähne-Raden, Nico Marschollek, Michael Kulau, Ulf Wolf, Lars Peter L. Reichertz Institute for Medical Informatics TU Braunschweig and Hannover Medical School Germany Institute for Operating Systems and Computer Networks TU Braunschweig Germany

ISBN: (纸本)9781450354592

The Ballistocardiography (BCG) aims to analyze the ballistic forces on the heart in terms of vibrations that are transmitted to the body’s surface. These vibrations can be measured by accelerometers. But instead of highly specialized analog sensors, we propose BCG based on commercially available digital accelerometers. To achieve this, we performed a bunch of trials to gain information about proper acceleration sensor technology, as well as needed requirements to create a full-fledged BCG sensor board. This sensor board as well as first results are presented within this paper. © 2017 Association for Computing Machinery.

关键词： Cardiography

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User study on the feasibility of incentive systems for smartphone-based DTNs in smart cities 1

User study on the feasibility of incentive systems for smart...

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1st ACM International Workshop on Wireless and Mobile Technologies for Smart Cities, WiMobCity 2014

作者： Schildt, Sebastian Lüdtke, Tim Reinprecht, Klaus Wolf, Lars Institute of Operating Systems and Computer Networks Technische Universität Braunschweig Braunschweig Germany Inspectio Forschungsinstitut Dieselstraße 28 Garching/Munich Germany

ISBN: (纸本)9781450330367

The idea that devices in a distributed system share their resources is quite old. Recent research areas which continue to rely on this idea are opportunistic networks and participatory sensing. Substantial theoretical work regarding the design of incentive systems intended to encourage and sustain participation in such applications is available: While most of the existing work deals with technical implementations and the question how to make these systems fair and secure, not much thought has been given to the question what an acceptable and economically feasible incentive could be. In this work we implemented an incentive system for a smartphone-based Delay Tolerant Network (DTN) and performed a 1 month study where users tested and evaluated the system. We analysed the users' motives and the sustainability and feasibility of the examined incentive system. Copyright is held by the owner/author(s).

关键词： Delay tolerant networks

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Efficient routing table lookup for IPv6

Efficient routing table lookup for IPv6

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IEEE Workshop on High-Performance Communication systems, HPCS

作者： M. Zitterbart T. Harbaum D. Meier D. Brokelmann Institute of Operating Systems and Computer Networks Brunswick Germany

High performance internetworking units, such as routers and bridges are key building blocks of current and emerging high performance networks. The aggregate data rate flowing through a router can be in the range of gigabits per second. In order to keep up with very high data rates, processing within the internetworking unit needs to be optimized. This paper concentrates on routing table look up. It presents a design for a routing table look up for gigabit routers running the new version of IP, EPv6. The proposed approach, HeaRT, is viewed as the core engine of an IM router.

关键词： Table lookup Internetworking Heart Search engines Routing protocols operating systems computer networks Bridges Aggregates Hardware

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Reliability analysis of vehicle-to-vehicle applications based on real world measurements

Reliability analysis of vehicle-to-vehicle applications base...

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10th ACM International Workshop on Vehicular Inter-Networking, systems, and Applications, VANET 2013

作者： Zinchenko, Tetiana Tchouankem, Hugues Wolf, Lars Leschke, André Volkswagen AG Wolfsburg Germany Institute of Communications Technology Leibniz Universität Hannover Germany Institute of Operating Systems and Computer Networks Technische Universität Braunschweig Germany

ISBN: (纸本)9781450320733

Safety applications are envisioned to be the first Vehicle-to-Vehicle (V2V) applications delivered to the mass market in the near future. In this paper, we address the question of achievable application-level reliability while operating over the Dedicated Short Range Communication (DSRC) channel. We advocate, that this reliability is a cumulative metric, which combines the main application operational requirements bounded with network performance metrics. In this context, we focus on (i) required information freshness and communication range, as main communication performance requirements and (ii) path prediction error, as application operational requirement. We present a novel simulation approach towards quantifying these metrics based on MATLAB vehicle dynamics models coupled with a driver reaction model. The input data for the simulation study is obtained empirically through real world experiments. This allows us to achieve numerical results with high accuracy. Further, based on data gathered in extensive real world measurement campaigns, we assess application-level reliability under different realistic conditions and perform a feasibility analysis of various NLOS scenarios while showing their potential for future V2V applications on the example of the Intersection Collision Warning (ICW). Finally, we investigate whether the packet delivery ratio (PDR) is capable to capture application-level reliability adequately and compare it with the metrics proposed in this work.

关键词： MATLAB

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REAPer — Adaptive Micro-Source Energy-Harvester for Wireless Sensor Nodes

REAPer — Adaptive Micro-Source Energy-Harvester for Wireles...

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IEEE Conference on ALocal computer networks Workshops (LCN Workshops)

作者： Ulf Kulau Daniel Bräckelmann Felix Büsching Sebastian Schildt Lars Wolf TU Braunschweig Institute of Operating Systems and Computer Networks

Energy Harvesting is a solution for continued operation of WSNs without depending on batteries. This paper introduces REAPer, an adaptive energy harvester for microsources that can be configured and monitored by the supplied WSN node. We combine REAPer with an IdealVolting capable sensor node that can fully exploit the monitoring and control capabilities of REAPer. The efficiency and overhead of the REAPer harvester is analysed. A field test evaluates REAPer with different power sources.

关键词： Wireless sensor networks Energy harvesting Wireless communication Batteries Monitoring Hardware Voltage control

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Platooning at traffic lights

Platooning at traffic lights

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2016 IEEE Intelligent Vehicles Symposium, IV 2016

作者： Gunther, Hendrik-Jorn Kleinau, Sandra Trauer, Oliver Wolf, Lars Volkswagen AG Germany C4c Engineering GmbH Germany Technische Universität Braunschweig Institute for Operating Systems and Computer Networks Germany

ISBN: (纸本)9781509018215

Congested roads not only lead to inattentive and inpatient drivers, but also have a significant negative economic impact. Especially during rush hour traffic at traffic light regulated intersections, inefficient cycle plans and the increased demand raise the need for mechanisms that increase the traffic efficiency. This paper presents a rule based algorithm for realizing platooning at traffic lights, in order to increase the throughput and to reduce the shock wave effect commonly observed at intersections. The algorithm makes use of Vehicle-2-X (V2X) communication technologies, by actively exchanging messages between the vehicles in order to set up the platoon. As a distinction to related work, the algorithm focuses on mixed traffic, in which not all vehicles are necessarily equipped with V2X technologies. The algorithm is implemented into an holistic simulation framework in order to study the effects of the parameters of the algorithm on the traffic efficiency. © 2016 IEEE.

关键词： Vehicles

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