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An Overview of µDTN: Unifying DTNs and WSNs
"... Abstract—Wireless Sensor Networkss (WSNs) nowadays are deployed in miscellaneous fields of application. Some use cases – especially those which include mobility – would benefit from a communication protocol that handles connection losses by design instead of assuming a continuous end-to-end connecti ..."
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Abstract—Wireless Sensor Networkss (WSNs) nowadays are deployed in miscellaneous fields of application. Some use cases – especially those which include mobility – would benefit from a communication protocol that handles connection losses by design instead of assuming a continuous end-to-end connection. In this work, we describe the implementation of a Delay Tolerant Network (DTN) protocol for WSNs, that is based on the Bundle Protocol (BP) specifications. The BP specifies a “store, carry and forward ” network protocol that can be used in scenarios with changing network topologies and unstable links. With µDTN, we present a DTN implementation for Contiki OS which is compatible to Contiki’s network stack and is able to handle disruptions without packet loss. Furthermore, it is interoperable with BP implementations running on Linux. I.
Data Elevators: Applying the Bundle Protocol in Delay Tolerant Wireless Sensor Networks
- In Proceedings of the 9th IEEE International Conference on Mobile Ad-hoc and Sensor Systems (IEEE MASS
, 2012
"... Abstract—Delay Tolerant Networking (DTN) enables transfer of data where conventional network protocols fail to deliver data because no continuous end-to-end connectivity is available. While the Bundle Protocol (BP) has been established as the standard DTN protocol in many application areas, Wireless ..."
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Abstract—Delay Tolerant Networking (DTN) enables transfer of data where conventional network protocols fail to deliver data because no continuous end-to-end connectivity is available. While the Bundle Protocol (BP) has been established as the standard DTN protocol in many application areas, Wireless Sensor Networks (WSN) often use proprietary protocols with a subset of the BP features. In this paper we use an exemplary application to demonstrate how the BP can be beneficial for many WSN-based projects. We show, how low-power sensor nodes can transport bundles by exploiting existing movement in the environment. More importantly we show, how 8-bit WSN nodes can seamlessly interact with standard BP implementations running on standard PCs. Our application, a sensor that is installed on the roof of a 15story building, is using an elevator to transport bundles carrying measured values to our lab. We analytically compare the BP to existing protocols for WSNs, evaluate our application scenario and give insight into principal limitations. I.
Delay-Tolerant Networking in Restricted Networks
"... For security reasons, many companies usually allow only strictly regulated communication, specific system configurations and predetermined software components. Therefore, often only communication over the HTTP protocol is possible, which operates by using a request-response approach. In this paper w ..."
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For security reasons, many companies usually allow only strictly regulated communication, specific system configurations and predetermined software components. Therefore, often only communication over the HTTP protocol is possible, which operates by using a request-response approach. In this paper we present the design and evaluation of a convergence layer for our DTN implementation IBR-DTN using HTTP as underlying protocol. On the remote side we use a web server and a database for the connection management. Through the usage of long-polling we realize a bidirectional communication. In the evaluation, we show the results of bandwidth and latency measurements.
Demo: Using DTN for Controlling A Vehicle With A Self Deployed WSN
"... We present an experimental mobile platform which can drop self contained sensor nodes to deploy a Wireless Sensor Net-work (WSN). At the same time, this network can be used to increase the operation range of the mobile platform. 1. ..."
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We present an experimental mobile platform which can drop self contained sensor nodes to deploy a Wireless Sensor Net-work (WSN). At the same time, this network can be used to increase the operation range of the mobile platform. 1.
A Survey of Delay- and Disruption-Tolerant Networking Applications
"... is a new communication paradigm that can span across multiple networks and cope with harsh conditions not envisioned in the Internet model. After more than ten years of active research in the field, numerous implementations and applications have emerged with a wide variety of performance and applica ..."
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is a new communication paradigm that can span across multiple networks and cope with harsh conditions not envisioned in the Internet model. After more than ten years of active research in the field, numerous implementations and applications have emerged with a wide variety of performance and application domains. In this survey, we summarize recent developments in the field and highlight those areas with high potential for future development.
Communication Architecture, Challenges and Paradigms for Robotic Firefighters
"... Mobile robots can be helpful for post disaster management, e.g., to explore hazardous and damaged environments. How-ever, many challenges in various areas have to be solved, e.g., mechanical issues, situation awareness, communication ca-pabilities. We present the interdisciplinary research project R ..."
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Mobile robots can be helpful for post disaster management, e.g., to explore hazardous and damaged environments. How-ever, many challenges in various areas have to be solved, e.g., mechanical issues, situation awareness, communication ca-pabilities. We present the interdisciplinary research project Robotic Firefighters (RFF) which addresses some of the IT problems. We take a detailed look at the proposed dis-tributed communication infrastructure enabling communi-cation between different autonomous mobile RFF units. Be-sides direct multihop communication, the RFF communica-tion architecture includes the ability to have an RFF robot physically distribute communication nodes called Dropboxes. They can be used to deploy a WSN or act as data exchange points enabling communication and coordination between RFF units. Prototype implementations of the RFF Dropbox concept, including two kinds of Dropboxes, and an experi-mental platform for automatic deployment, are introduced.
Secure Smartphone-based Registration and Key Deployment for Vehicle-to-Cloud Communications
- in Proceedings of the ACM Workshop on Security, Privacy and Dependability for Cyber Vehicles (CyCAR ’13
, 2013
"... Intelligent Transportation Systems that rely on Vehicle-to-Cloud communications are emerging. Of particular inter-est to us is the question how drivers can securely register their vehicle with cloud services and deploy keys for secur-ing vehicular communications. We therefore present a secure smartp ..."
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Intelligent Transportation Systems that rely on Vehicle-to-Cloud communications are emerging. Of particular inter-est to us is the question how drivers can securely register their vehicle with cloud services and deploy keys for secur-ing vehicular communications. We therefore present a secure smartphone-based registration and key deployment process for these applications. We combine an adapted OAuth flow for Smartphone-to-Cloud communications with a novel key deployment mechanism for Public Key Infrastructures in ve-hicular networks. The primary contributions of the proposed key deployment process are a high degree of independence from central authorities and feasible security audits due to an open protocol design. As an instance of future Intelligent Transportation System applications that facilitate Vehicle-to-Cloud communications, we utilize the V-Charge project as a running example to discuss potential attack scenarios and their mitigations.
Version Date Comment 1.0 2011-09-16 Initial VersionAn Empirical Performance Comparison of DTN Bundle Protocol Implementations
, 2011
"... In recent years, Delay Tolerant Networking (DTN) has received a lot of interest from the networking community. Today the Bundle Protocol (RFC 5050) is the standard communication protocol in DTNs and three major implementations are available. Since DTN is still a young research area, specifications a ..."
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In recent years, Delay Tolerant Networking (DTN) has received a lot of interest from the networking community. Today the Bundle Protocol (RFC 5050) is the standard communication protocol in DTNs and three major implementations are available. Since DTN is still a young research area, specifications as well as implementations have not yet reached the same state of maturity as e.g. TCP protocol stacks. As of now no quantitative analysis of the different implementation’s performance or a structured evaluation of interoperability has been undertaken. In this paper we present an interoperability check and perform an extensive quantitative performance analysis of the three main Bundle Protocol implementations. While the overall results show that all implementations provide some baseline compatibility with each other, the stability and achieved performance under stress situations varies widely between implementations. 1
Live-Streaming in Delay Tolerant Networks
"... Streaming of audiovisual media contents such as video or music using mobile devices and wireless networks leads to new challenges because these network connections are typically not very reliable. In this demo, we show streaming of live video using a Delay Tolerant Network (DTN) approach. This allow ..."
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Streaming of audiovisual media contents such as video or music using mobile devices and wireless networks leads to new challenges because these network connections are typically not very reliable. In this demo, we show streaming of live video using a Delay Tolerant Network (DTN) approach. This allows the integration of multiple connections which leads to a higher availability and enables a video transmission without loss in the data stream.
With Wireless Body Area Networks (WBANs), several
"... Abstract—Delay or disruption tolerant protocols can be used in several application areas. In the area of Ambient Assisted Living (AAL) or healthcare, these protocols are well-suited to provide a seamless handover between online and offline monitoring of vital parameters or activity data; this also i ..."
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Abstract—Delay or disruption tolerant protocols can be used in several application areas. In the area of Ambient Assisted Living (AAL) or healthcare, these protocols are well-suited to provide a seamless handover between online and offline monitoring of vital parameters or activity data; this also implies a synchronization of offline gathered data. In this paper, we analyze the expected data rates for several medical sensors and applications and give an insight into how to dimension such disruption tolerant protocols and systems. We also developed a scenario for activity recognition in which we constantly monitor the acceleration data of a wearable sensor node. We implemented and evaluated this scenario with our disruption tolerant protocol for wireless sensor nodes and show its overall functionality, its utility, and its limits.
