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Mitigating Blackhole attacks in a hybrid VDTN 15

Mitigating Blackhole attacks in a hybrid VDTN

引用

15th IEEE International Symposium on a World of Wireless, Mobile and Multimedia networks, WoWMoM 2014

作者： Guo, Yinghui Schildt, Sebastian Pougel, Tobias Rottmann, Stephan Wolf, Lars Institute of Operating Systems and Computer Networks Technische Universität Braunschweig Braunschweig Germany

ISBN: (纸本)9781479947867

In the past we presented a delay tolerant network that used public buses and trams in the city of Braunschweig to monitor air pollution. Today, as smartphones are becoming computationally more powerful and offer a variety of communication interfaces, it becomes attractive to investigate whether smartphones and vehicular nodes can cooperate with each other, forming a network that can provide better quality of service to applications. In this paper, we evaluate the feasibility of creating an integrated Delay- and Disruption-Tolerant Network (DTN) consisting of smartphones and the public transportation system. Most importantly we propose a Misbehavior Detection System (MDS) to protect the security of the hybrid network. The evaluation results show that our MDS is able to efficiently detect attackers and defend the hybrid network against the interference of malicious nodes. © 2014 IEEE.

关键词： Smartphones

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Impact of radio range on contact characteristics in bus-based delay tolerant networks

Impact of radio range on contact characteristics in bus-base...

引用

2011 8th International Conference on Wireless On-Demand Network systems and Services, WONS 2011

作者： Doering, Michael Pöttner, Wolf-Bastian Pögel, Tobias Wolf, Lars Institute of Operating Systems and Computer Networks Technische Universität Braunschweig Braunschweig Germany

ISBN: (纸本)9781612841885

In bus-based delay tolerant networks the duration of a contact between two nodes limits the amount of data that can be transferred. For the implementation of such networks it is important to determine which contact durations can be expected. Moreover, this information can be used by scheduling and routing algorithms to increase efficiency. In this paper we structure and characterize the different types of contacts and examine the effects of radio range on contact duration. For realistic results we experimentally investigate the typical range of IEEE 802.11a/b and use a real mobility trace of a large-scale public transport network. We report the simulation results for different types of contacts and the probability distribution of contact durations for various realistic ranges. Furthermore we show that the angle of contacts is an appropriate criterion for the classification of contacts, and propose to use it as input for routing and scheduling decisions. © 2010 IEEE.

关键词： Delay tolerant networks

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Time-reference distribution in delay tolerant networks

Time-reference distribution in delay tolerant networks

引用

7th ACM International Workshop on Challenged networks, CHANTS 2012

作者： Morgenroth, Johannes Wolf, Lars Institute of Operating Systems and Computer Networks Technische Universität Braunschweig Braunschweig Germany

ISBN: (纸本)9781450312844

A delay tolerant network (DTN) deals with the issue of frequently interrupted connections and relaxes the need for a continuous end-to-end relation between nodes. The Bundle Protocol is the typical way to set-up a DTN, but requires a common time in the whole network. Further, globally synchronized timestamps are required by many mechanisms like cryptography protocols or global event ordering. Since standard time synchronization approaches from classical networking do not work in DTNs, we introduce a novel algorithm to distribute a time reference in such networks. Our approach rates the quality of the local time with respect to the accuracy of the local clock. We show that this simple and self-aligning algorithm can provide an adequate accuracy depending on the inter-contact times between the nodes. Copyright © 2012 ACM.

关键词： Delay tolerant networks

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AMnet: Active multicasting network 4th

AMnet: Active multicasting network

引用

4th International COST 237 Workshop on From Multimedia Services to Network Services, 1997

作者： Wittmann, Ralph Zitterbart, Martina Institute of Operating Systems and Computer Networks Technical University of Braunschweig Braunschweig38106 Germany

ISBN: (纸本)3540639357

Today we are faced with an increasing variety of networks and end systems. The resulting heterogeneous environment imposes new challenges on communication support for multimedia and collaborative applications. AMnet is an approach that provides multipoint communication support for large-scale groups with heterogeneous receivers. Active network nodes are used to deliver data streams with user-tailored QoS. They provide so-called QoS filters that remove information from continuous media streams in order to reduce data rate for low-end receivers without affecting high-end receivers. A prototype implementation of AMnet based on RSVP is presented. © Springer-Verlag Berlin Heidelberg 1997.

关键词： Multicasting

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Demo: PotatoNet - Robust outdoor testbed for WSNs: Experiment like on your desk. Outside. 10

Demo: PotatoNet - Robust outdoor testbed for WSNs: Experimen...

引用

10th ACM MobiCom Workshop on Challenged networks, CHANTS 2015

作者： Kulau, Ulf Schildt, Sebastian Rottmann, Stephan Gernert, Björn Wolf, Lars Institute of Operating Systems and Computer Networks Technische Universität Braunschweig Braunschweig Germany

We present PotatoNet, an outdoor testbed for Wireless Sensor networks (WSNs). Its primary focus is robustness, reliability and flexibility. PotatoNet is designed to operate without on-site maintenance for extended per... 详细信息

ISBN: (纸本)9781450335430

关键词： Testbeds

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Demonstration of a low-power energy management module with emergency reserve for solar-powered DTN-nodes 11

Demonstration of a low-power energy management module with e...

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3rd Extreme Conference on Communication: The Amazon Expedition, ExtremeCom 2011

作者： Doering, Michael Rottmann, Stephan Wolf, Lars Institute of Operating Systems and Computer Networks Technische Universität Braunschweig Braunschweig Germany

ISBN: (纸本)9781450310796

We propose a field experiment and a demonstration of a solar powered DTN node with a power management module. This module reduces the power consumption of the node by turning it off when the node is idle. It also handles solar charge management, energy management and a discovery mechanism to wakeup sleeping nodes. Copyright 2011 ACM.

关键词： Solar energy

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Piggy-backing link quality measurements to IEEE 802.15.4 acknowledgements

Piggy-backing link quality measurements to IEEE 802.15.4 ack...

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8th IEEE International Conference on Mobile Ad-hoc and Sensor systems, MASS 2011

作者： Pottner, Wolf-Bastian Schildt, Sebastian Meyer, Daniel Wolf, Lars Institute of Operating Systems and Computer Networks Technische Universität Braunschweig Braunschweig Germany

ISBN: (纸本)9780769544694

In this paper we present an approach to piggyback link quality measurements to IEEE 802.15.4 acknowledgement frames by generating acknowledgements in software instead of relying on hardware support. We show that the software-generated ACKs can be sent meeting the timing constraints of IEEE 802.15.4. This allows for a standard conforming, energy neutral dissemination of link quality related information in IEEE 802.15.4 networks. This information is available at no cost when transmitting data and can be used as input for various schemes for adaptive transmission power control and to assess the current channel quality. © 2011 IEEE.

关键词： IEEE Standards

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Impact of Perspectives on Collective Perception 27

Impact of Perspectives on Collective Perception

引用

27th IEEE International Conference on Intelligent Transportation systems, ITSC 2024

作者： Willecke, Alexander Yazici, Cengiz Wolf, Lars C. Technische Universität Braunschweig Institute of Operating Systems and Computer Networks Braunschweig38106 Germany

ISBN: (纸本)9798331505929

Collective Perception (CP) is the key technology for integrating non-connected road users into the Cooperative-Intelligent Transportation System. Thereby, ITS-Stations share locally perceived object data with others via broadcast communication. Previous studies on CP focused on the trade-off between resource usage and Environmental Awareness Ratio, assuming that atomic objects are either known or unknown. However, Perceived Objects consist of multiple attributes describing their state, such as position, speed, and dimensions. Stations perceive the traffic situation and objects from different perspectives, influencing which attributes can be observed. This study shows the performance of CP in three different traffic scenarios and analyzes the completeness of objects and availability of object attributes. It shows that completeness and availability depend on the traffic situation and are influenced by average speed, traffic, building density, and road layouts. Furthermore, results indicate that important object attributes, such as dimensions, are often missing, and the object's center point is often unknown. © 2024 IEEE.

关键词： Economic and social effects

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Object Fusion for Collective Perception: Will it Scale? 27

Object Fusion for Collective Perception: Will it Scale?

引用

27th IEEE International Conference on Intelligent Transportation systems, ITSC 2024

作者： Willecke, Alexander Stahl, Roman Wolf, Lars C. Technische Universität Braunschweig Institute of Operating Systems and Computer Networks Braunschweig38106 Germany

ISBN: (纸本)9798331505929

With Collective Perception, stations exchange information from their local perception with each other via broadcast communication. The information about perceived objects can enhance their awareness, allowing perception beyond their line of sight and increasing traffic safety. Therefore, received object information must be processed by an Object Fusion system that creates a holistic environment model. Solving this fusion problem is not trivial and computationally expensive. However, the computing power required for a single station that implements an Object Fusion system depends on the amount of object data that must be processed. The amount of data will rise with a progressing market introduction as more stations share their perception. For analyzing the scalability of fusion, the Artery V2X Simulation framework was extended with an Object Fusion architecture. The results show how much object data must be processed and stored for three realistic large-scale traffic scenarios at different Market Penetration Rates. © 2024 IEEE.

关键词： Data fusion

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SCTPCL: An SCTP Convergence Layer protocol for DTN 11

SCTPCL: An SCTP Convergence Layer protocol for DTN

引用

11th ACM Workshop on Challenged networks, CHANTS 2016

作者： Wegner, Martin Rottmann, Stephan Wolf, Lars C. Institute of Operating Systems and Computer Networks Technische Universität Braunschweig Braunschweig38106 Germany

ISBN: (纸本)9781450342568

The Stream Control Transmission Protocol (SCTP) offers several distinct features which can be leveraged for Disruption or Delay Tolerant Networking (DTN). SCTP is able to handle an arbitrary number of independent streams in one connection—termed an association—and it also supports using multiple networking devices in one association at the same time (multi-homing). With the latter, either switching between network devices, e. g., for fail-over, or even Concurrent Multipath Transfer (CMT) is possible during a transfer. In this paper, we present SCTPCL, a Convergence Layer protocol for the Bundle Protocol, which brings these benefits to DTN implementations. We leverage the multi-streaming capability to handle priorities, such as those of the Bundle Protocol, as well as a separate control stream in parallel. Multi-homing not only enables an increased reliability, but is also especially useful for energy-aware wireless systems where a transfer may be initiated using a low-power device while for larger data it can be switched to a high bandwidth link. © 2016 Copyright held by the owner/author(s).

关键词： Delay tolerant networks

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