@INPROCEEDINGS{Muthukrishnan06a,
AUTHOR = {K. Muthukrishnan and N. Meratnia and M. E. Lijding and G. Koprinkov and P.J.M. Havinga},
TITLE = {{WLAN} location sharing through a privacy observant architecture},
BOOKTITLE = {1st Int. Conf. on Communication System Software and Middleware ({COMSWARE})},
PUBLISHER = {IEEE Computer Society Press, Los Alamitos, California},
ADDRESS = {New Delhi, India},
MONTH = JAN,
YEAR = {2006},
PAGES = {to appear},
ABSTRACT = {In the last few years, WLAN has seen immense growth and it will
continue this trend due to the fact that it provides convenient
connectivity as well as high speed links. Furthermore, the
infrastructure already exists in most public places and is cheap
to extend. These advantages, together with the fact that WLAN
covers a large area and is not restricted to line of sight, have
led to developing many WLAN localization techniques and
applications based on them. In this paper we present a novel
calibration-free localization technique using the existing WLAN
infrastructure that enables conference participants to determine
their location without the need of a centralized system. The
evaluation results illustrate the superiority of our technique
compared to existing methods.
In addition, we present a privacy observant architecture to share
location information. We handle both the location of people and
the resources in the infrastructure as services, which can be
easily discovered and used. An important design issue for us was
to avoid tracking people and giving the users control over who
they share their location information with and under which
conditions.},
URL = {http://wwwes.cs.utwente.nl/smartsurroundings/publications/Muthukrishnan06a.pdf}
}
@INPROCEEDINGS{Muthukrishnan05c,
AUTHOR = {Kavitha Muthukrishnan and Nirvana Meratnia and Maria Lijding and Georgi Koprinkov and Paul Havinga},
TITLE = {Demonstrating FLAVOUR: Friendly Location-aware conference Assistant with priVacy Observant architectURe},
BOOKTITLE = {Proceedings of the third international conference on Service oriented Computing},
NOTE = {to appear},
YEAR = {2005},
MONTH = {December},
ISBN = {3-540-25896-5},
LOCATION = {Amsterdam, The Netherlands},
PUBLISHER = {Springer Verlag},
ABSTRACT = {In this paper, we describe an implementation of
FLAVOUR (Friendly Location-aware conference Assistant with
priVacy Observant architectURe), in which people/infrastructure
resources act as individual service providers offering their
location as a service. By subscribing to this service, in the one
hand, conference participants can be aware of each others
whereabouts as well as being able to chat. On the other hand,
conference organizers can notify interested attendants about
special events such as cancellation of a track or change in the
presentation rooms. The presented architecture uses existing WLAN
infrastructure for cost efficiency, and uniquely incorporates the
location information as a service into Jini service discovery
platform. Location itself is determined with high accuracy by
using a calibration free technique.},
ANNOTE = {Demo paper},
URL = {http://wwwes.cs.utwente.nl/smartsurroundings/publications/Muthukrishnan05c.pdf}
}
@INPROCEEDINGS{Muthukrishnan05b,
AUTHOR = {K. Muthukrishnan AND M. Lijding AND P. J. M. Havinga},
MONTH = MAY,
YEAR = 2005,
TITLE = {Towards Smart Surroundings: Enabling Techniques and Technologies
for Localization.},
BOOKTITLE = {Proceedings of the First International Workshop on
Location- and Context-Awareness ({LoCA} 2005)},
EDITOR = {Thomas Strang AND Claudia Linnhoff-Popien},
ISBN = {3-540-25896-5},
CONFERENCE = {International Workshop on Location- and Context-Awareness (LoCA 2005)
held in cooperation with Pervasive 2005},
LOCATION = {Oberpfaffenhofen, Germany},
PUBLISHER = {Springer Verlag, Berlin},
PAGES = {350-362},
SERIES = {Lecture Notes in Computer Science},
VOLUME = 3479,
ABSTRACT = {In this paper we identify the common techniques and technologies that
are enabling location identification in a ubiquitous computing environment.
We also address the important parameters for evaluating such systems.
Through this survey, we explore the current trends in commercial
products and research in the area of localization. Although localization
is an old concept, further research is needed to make it really usable
for ubiquitous computing. Therefore, we indicate future research directions and
address localization in the framework of our Smart Surroundings project.},
URL = {http://wwwes.cs.utwente.nl/smartsurroundings/publications/Muthukrishnan05b.pdf}
}
@INPROCEEDINGS{Law05,
AUTHOR = {Y. W. Law and P. H. Hartel and J. I. den Hartog and P. J. M Havinga},
TITLE = {Link-layer jamming attacks on {{S}-MAC}},
BOOKTITLE = {2nd {European} Workshop on Wireless Sensor Networks ({EWSN})},
PUBLISHER = {IEEE},
LOCATION = {Istanbul, Turkey},
MONTH = {January},
YEAR = {2005},
PAGES = {217-225},
URL = {http://www.ub.utwente.nl/webdocs/ctit/1/00000114.pdf},
ISBN = {0-7803-8801-1},
ABSTRACT = {We argue that among denial-of-service (DoS) attacks, link-layer jamming is a more attractive option to attackers than radio jamming is. By exploiting the semantics of the link-layer protocol (aka MAC protocol), an attacker can achieve better efficiency than blindly jamming the radio signals alone. We investigate some jamming attacks of S-MAC, what level of effectiveness and efficiency the attack can potentially achieve, and what countermeasures can be implemented against these attacks.},
ANNOTE = {GROUP DIES},
ANNOTE = {TOPIC Security},
ANNOTE = {PROGRAM ISTRICE},
ANNOTE = {PROJECT Eyes},
ANNOTE = {refs},
ANNOTE = {inproceedings}
}
@ARTICLE{Havinga04b,
AUTHOR = {Paul Havinga AND Jennifer C. Hou AND Mani Srivastava AND Feng Zhao},
TITLE = {Wireless Sensor Networks},
JOURNAL = {IEEE Wireless Communication magazine},
MONTH = {December},
YEAR = 2004,
VOLUME = 11,
NUMBER = 6,
PAGES = {4-5},
ISSN = {1536-1284},
NOTE = {Guest editorial},
URL = {http://ieeexplore.ieee.org/iel5/7742/29957/01368892.pdf?isnumber=29957&arnumber=1368892}
}
@INPROCEEDINGS{Chatterjea04a,
AUTHOR = {S. Chatterjea AND L.F.W. van Hoesel AND P.J.M. Havinga},
TITLE = {{AI-LMAC}: An Adaptive, Information-centric and Lightweight MAC Protocol for Wireless Sensor Networks},
BOOKTITLE = {2nd Int. Conf. on Intelligent Sensors, Sensor Networks and Information Processing},
PUBLISHER = {{IEEE} Computer Society, Washington, DC},
LOCATION = {Melbourne, Australia},
MONTH = {December},
YEAR = {2004},
ABSTRACT = {In this paper we present a novel TDMA-based medium access
control (MAC) protocol for wireless sensor networks. Unlike
conventional MAC protocols which function independently of the
application, we introduce an Adaptive, Informationcentric and
Lightweight MAC(AI-LMAC) protocol that adapts its operation
depending on the requirements of the application. We also present
a completely localised data management framework that helps
capture information about traffic patterns in the network. This
information is subsequently used by AI-LMAC to modify its
operation accordingly. The data management framework can
additionally be used for efficient query dissemination and query
optimisation. We present preliminary results showing how the MAC
protocol efficiently manages the issues of fairness and latency.},
URL = {http://wwwhome.cs.utwente.nl/~hoesel/publications/issnip2004-Chatterjea.pdf}
}
@INPROCEEDINGS{Dulman04a,
AUTHOR = {S.Dulman and P.Havinga},
TITLE = {Statistically enhanced localization schemes for randomly deployed wireless sensor networks},
BOOKTITLE = {2nd Int. Conf. on Intelligent Sensors, Sensor Networks and Information Processing},
PUBLISHER = {{IEEE} Computer Society, Washington, DC},
LOCATION = {Melbourne, Australia},
MONTH = {December},
YEAR = {2004},
ABSTRACT = {In this paper we address the localization problem for semistatic,
randomly deployed, wireless sensor networks. The influence
of the underlying random topology is taken in discussion
and based on it we derive distance estimations function of the
number of hops two nodes are separated by, and characterize
the precision of these estimations.
The results are applied to two well-known localization
schemes (DVHop and DVDistance) and improvements of
roughly 26% for the first algorithm and 20% for the second
algorithm in the positioning error are obtained. The introduced
overhead is kept at a minimum as the resulting protocols are
simpler than the original ones and only density information
needs to be broadcasted to the nodes.},
URL = {http://wwwhome.cs.utwente.nl/~dulman/docs/paper_australia.pdf}
}
@ARTICLE{vanHoesel04a,
AUTHOR = {van Hoesel, L. AND Nieberg, T. AND Jian Wu AND Havinga, P.J.M.},
TITLE = {Prolonging the lifetime of wireless sensor networks by cross-layer interaction},
JOURNAL = {{IEEE} Wireless Communications},
MONTH = {December},
YEAR = 2004,
VOLUME = 11,
NUMBER = 6,
PAGES = {78-86},
ISSN = {1536-1284},
ABSTRACT = {This article presents a cross-layered approach for
networking in wireless sensor networks. WSNs differ greatly
from traditional ad hoc wireless networks and therefore
require the use of new types of network protocols that are
energy-efficient to ensure a node lifetime of several years on
a single battery and can operate without assistance of central
managers in a dynamic network topology. We show that a tightly
integrated set of networking protocols is a good solution to
reach the target of highly energy-efficient WSNs. Our approach
combines medium access organization with routing.},
URL = {http://ieeexplore.ieee.org/iel5/7742/29957/01368900.pdf?arnumber=1368900}
}
@INPROCEEDINGS{vanHoesel04b,
AUTHOR = {L.F.W. van Hoesel AND S. Chatterjea AND P.J.M. Havinga},
TITLE = {A Low-Latency, Information-Centric Medium Access Protocol for Wireless Sensor Networks},
BOOKTITLE = {Proceedings of {ProRisc}},
CONFERENCE = {ProRisc},
LOCATION = {Veldhoven, The Netherlands},
MONTH = {November},
YEAR = 2004,
ABSTRACT = {In this paper we present a novel TDMA-based
medium access control (MAC) protocol for wireless sensor
networks. Unlike conventional MAC protocols which function
independently of the application, we introduce an Adaptive,
Information-centric and Lightweight MAC(AI-LMAC)
protocol that adapts its operation depending on the requirements
of the application. We also present a completely localised
data management framework that helps capture information
about traffic patterns in the network. This information
is subsequently used by AI-LMAC to modify its operation
accordingly. We present preliminary results showing
how the MAC protocol efficiently manages the issues of fairness,
latency and message buffer management.},
URL = {http://wwwhome.cs.utwente.nl/~hoesel/publications/VanHoesel-ProRisc2004.pdf}
}
@INPROCEEDINGS{vanHoesel04c,
AUTHOR = {L.F.W. van Hoesel AND P.J.M. Havinga},
TITLE = {An Energy-efficient Medium Access Protocol for Wireless Sensor Networks},
BOOKTITLE = {Proceedings of {SenSys}},
CONFERENCE = {SenSys},
LOCATION = {Baltimore, USA},
YEAR = 2004,
MONTH = {November},
ABSTRACT = {In this document we explore a TDMA based
MAC protocol for WSNs. WSNs differ greatly from traditional
ad hoc wireless networks like IEEE 802:11. This requires
the usage of new types of MAC protocols, that are
energy-efficient to ensure a node lifetime of several years
on a single battery and can operate without assistance of
base-stations. In the MAC protocol we present, nodes can
autonomously choose a time slot, the transceiver usage is
reduced to minimum, while nodes are provided with local
topology information. The latter helps routing in the WSN
and reduces routing messages. The MAC protocol also enables
efficient transmission of short omni cast network maintenance
messages, like routing and clustering messages.},
URL = {http://wwwhome.cs.utwente.nl/~hoesel/publications/VanHoesel-ProRisc2003.pdf}
}
@INPROCEEDINGS{Dulman04b,
AUTHOR = {Stefan Dulman AND Tjerk Hofmeijer AND Paul Havinga},
TITLE = {AmbientRT - Real Time, Data Centric System Software for Wireless Sensor Networks},
BOOKTITLE = {Proceedings of the 21st sensor symposium on sensors, micromachine and applied systems {(SMAS 2004)}},
CONFERENCE = {21st sensor symposium on sensors, micromachine and applied systems (SMAS 2004)},
MONTH = {October},
YEAR = 2004,
LOCATION = {Kyoto, Japan},
ABSTRACT = {We present the architecture and design of a real time operating
system for mobile wireless sensor networks. AmbientRT is
being developed for environments with very limited resources
in order to relieve the burden of the developer and to efficiently
use the resources of the node. This paper presents the main
concepts used and trade-offs involved in the system. Initial
results show that with the current hardware available for
sensor networks, the real time concept is feasible.
For real-time scheduling we have designed EDFI. EDFI
is a lightweight real-time scheduling protocol that combines
EDF with deadline inheritance over shared resources. EDFI
is precise with task admission control, very efficient with
scheduling and dispatching, and straightforward in feasibility
analysis.},
URL = {http://www.ub.utwente.nl/webdocs/ctit/1/00000116.pdf}
}
@INPROCEEDINGS{Wu04a,
AUTHOR = {Jian Wu AND Stefan Dulman AND Paul Havinga},
TITLE = {Reliable Splitted Multipath Routing for Wireless Sensor Networks},
BOOKTITLE = {Proceedings of IFIP International Conference on Network and Parallel Computing {(NPC 2004)}},
PUBLISHER = {Springer-Verlag GmbH},
SERIES = {Lecture Notes in Computer Science},
ISSN = {0302-9743},
EDITOR = {Hai Jin AND Guang R. Gao AND Zhiwei Xu},
ISBN = {3-540-23388-1},
YEAR = 2004,
MONTH = OCT,
PAGES = {592-600},
ABSTRACT = {In wireless sensor networks (WSN) the reliability
of the system can be increased by providing several paths from
the source node to the destination node and by sending the
same packet through each of them (the algorithm is known as
multipath routing). Using this technique, the traffic
increases significantly. In this paper, we analyze the
combination between a new multipath routing mechanism and a
data-splitting scheme that results in an efficient solution
for achieving high delivery ratios while keeping the traffic
at a low value. Simulation results are presented in order to
characterize the performances of the algorithm.},
URL = {http://wwwhome.cs.utwente.nl/~dulman/docs/paper_bison.pdf}
}
@INPROCEEDINGS{vanHoesel04d,
AUTHOR = {L.F.W. van Hoesel AND P.J.M. Havinga},
TITLE = {A Lightweight Medium Access Protocol ({LMAC}) for Wireless Sensor Networks: Reducing Preamble Transmissions and Transceiver State Switches},
BOOKTITLE = {1st International Workshop on Networked Sensing Systems {(INSS 2004)}},
LOCATION = {Tokyo, Japan},
MONTH = JUN,
YEAR = 2004,
ABSTRACT = {In this paper, we present an energy-efficient medium access protocol designed for wireless sensor networks. Although
the protocol uses TDMA to give nodes in the WSN the opportunity to communicate collision-free, the network is
self-organizing in terms of time slot assignment and synchronization. The main goal of the medium access protocol is
to minimize overhead of the physical layer. The protocol reduces the number of transceiver state switches and hence
the energy wasted in preamble transmissions. The protocol is compared to SMAC and EMACs by simulation. The
LMAC protocol is able to extend the network lifetime by a factor 2.4 and 3.8, compared to EMACs and SMAC
respectively.},
URL = {http://wwwhome.cs.utwente.nl/~hoesel/publications/VanHoesel-INSS2004.pdf}
}
@INPROCEEDINGS{Chatterjea04b,
AUTHOR = {Supriyo Chatterjea AND Paul Havinga},
TITLE = {A Framework for a Distributed and Adaptive Query Processing Engine for Wireless Sensor Networks},
BOOKTITLE = {1st International Workshop on Networked Sensing Systems {(INSS 2004)}},
LOCATION = {Tokyo, Japan},
MONTH = JUN,
YEAR = 2004,
ABSTRACT = {Wireless sensor networks (WSNs) are formed of tiny, highly energy-constrained sensor nodes that are equipped with
wireless transceivers and can be used primarily in environmental monitoring applications. The nodes communicate
with one another by autonomously creating ad-hoc multihop networks which are subsequently used to gather sensor
data. WSNs also process the data within the network itself and only forward the result to the requesting node. This is
referred to as in-network data aggregation and results in the substantial reduction of the amount of data that needs to
be transmitted by any single node in the network. We present a framework for WSNs which would allow optimised
query execution plans to be generated in a distributed manner within the network thus preventing the need to
transmit network metadata all the way to a central server. Query plans also adapt continuously by monitoring varying
network conditions to maintain energy-efficient operation thus maximising network lifetime.},
URL = {http://wwwhome.cs.utwente.nl/~supriyo/papers/INSS2004-chatterjea_havinga.pdf}
}
@INPROCEEDINGS{vanHoesel04e,
AUTHOR = {L.F.W. van Hoesel AND T. Nieberg AND J.Wu and P.J.M. Havinga},
TITLE = {Communciation in the {EYES} Wireless Sensor Network: Tight Integration of Networking Layers Extends Lifetime},
BOOKTITLE = {Proceedings of the International Workshop on Wireless Ad hoc Networks, EU cluster day},
LOCATION = {Finland},
MONTH = JUN,
YEAR = 2004,
ABSTRACT = {This paper reports on work-in-progress of a cross-layered
approach for networking in wireless sensor networks (WSNs) as currently
being developed as part of the European research project EYES (IST-
2001-34734).
Part of the overall goal of the EYES project is to develop new protocols
and mechanism for WSNs, which are energy-ecient to ensure a node
lifetime of several years on batteries, and which can operate without
assistance of central managers in a dynamic network topology.
The approach presented combines medium access organization, an im-
plicit infrastructure creation, and routing. We show that a tightly inte-
grated set of networking protocols is a viable solution to reach this target
of highly energy-ecient WSNs.
The medium access protocol consists of a fully distributed and self-
organizing TDMA scheme, in which so called active nodes broadcast
short control messages in their autonomously chosen time slot. At the
same time, these short control messages are also used to create a con-
nected subnetwork of these active nodes, while other, redundant nodes
are passive and able to save energy by exploiting the so-created infras-
tructure. The control message is also used by the routing protocol to
establish and maintain ecient routes in a dynamic topology.
The presented approach is compared to an existing communication solu-
tion for WSNs, consisiting of SMAC for medium access control and DSR
for the multi-hop routing of messages.},
URL = {http://wwwhome.cs.utwente.nl/~hoesel/publications/VanHoesel-EUClusterday2004.pdf}
}
@INPROCEEDINGS{Ruzzelli04,
AUTHOR = {A.G. Ruzzelli AND L. Evers AND S.O. Dulman AND L.F.W. van Hoesel AND P.J.M. Havinga},
TITLE = {On the design of an energy-efficient low-latency integrated protocol for distributed mobile sensor networks},
BOOKTITLE = {Proceedings of the International Workshop on Wireless Ad hoc Networks, EU cluster day},
LOCATION = {Finland},
MONTH = JUN,
YEAR = 2004,
ABSTRACT = {Self organizing, wireless sensors networks are an
emergent and challenging technology that is at-
tracting large attention in the sensing and moni-
toring community. Impressive progress has been
done in recent years even if we need to assume that
an optimal protocol for every kind of sensor net-
work applications can not exist. As a result it is
necessary to optimize the protocol for certain sce-
narios. In many applications for instance latency is
a crucial factor in addition to energy consumption.
MERLIN performs its best in such WSNs where
there is the need to reduce the latency while ensur-
ing that energy consumption is kept to a minimum.
By means of that, the low latency characteristic
of MERLIN can be used as a trade o® to extend
node lifetimes. The performance in terms of energy
consumption and latency is optimized by acting on
the slot length. MERLIN is designed speci¯cally to
integrate routing, MAC and localization protocols
together. Furthermore it can support data queries
which is a typical application for WSNs. The MER-
LIN protocol eliminates the necessity to have any
explicit handshake mechanism among nodes. Fur-
thermore, the reliability is improved using multiple
path message propagation in combination with an
overhearing mechanism. The protocol divides the
network into subsets where nodes are grouped in
time zones. As a result MERLIN also shows a good
scalability by utilizing an appropriate scheduling
mechanism in combination with a contention pe-
riod.},
URL = {http://wwwhome.cs.utwente.nl/~hoesel/publications/Ruzzelli-IWWAN2004.pdf}
}
@INPROCEEDINGS{vanHoesel04f,
AUTHOR = {van Hoesel, L.F.W. AND Nieberg, T. AND Kip, H.J. AND Havinga, P.J.M.},
TITLE = {Advantages of a {TDMA} based, energy-efficient, self-organizing mac protocol for {WSN}},
BOOKTITLE = {Proceedings of the IEEE 59th Vehicular Technology Conference {(VTC 2004-Spring)}},
YEAR = 2004,
MONTH = MAY,
PAGES = {1598 - 1602},
VOLUME = 3,
ISSN = {1550-2252},
ABSTRACT = {This paper presents EMACs, a medium access
protocol especially designed for wireless sensor networks.
The medium access protocol consists of a fully distributed
and self-organizing TDMA scheme, in which each active node
periodically listens to the channel and broadcasts a short control
message. This control message is needed for medium access
operation and is also used to piggy bag various types of
information at low energy costs.
Information in the control message is used to create a maximal
independent set of nodes. This set of nodes creates a connected
network and nodes in the set are active, while other nodes are
passive and save energy by exploiting the infrastructure created
by the connected network.
The presented approach is compared in simulation with the
SMAC protocol (a medium access protocol with coordinated
adaptive sleeping) in a realistic multi-hop network setup where
sensor reading are transported to a specific node and routes are
established using the dynamic source routing protocol.
The EMACs protocol is able to extend the network lifetime
30\% to 55\% compared to SMAC in a static network topology and
in a dynamic network topology, EMACs prolongs the network
lifetime with a factor 2.9 to 4.2.},
URL = {http://wwwhome.cs.utwente.nl/~hoesel/publications/VanHoesel-IEEEVTC2004S.pdf}
}
@INPROCEEDINGS{Evers04,
AUTHOR = {Leon Evers AND Stefan Dulman AND Paul Havinga},
TITLE = {A Distributed Precision Based Localization Algorithm
for Ad-Hoc Networks},
CROSSREF = {Pervasive2004},
PAGES = {269--286},
ABSTRACT = {In this paper we introduce a new distributed
algorithm for location discovery. It can be used in
wireless ad-hoc sensor networks that are equipped
with means of measuring the distances between the
nodes (like the intensity of the received signal
strength). The algorithm takes the reliability of
measurements into account during calculation of the
nodes positions. Simulation results are presented,
showing the algorithms performance in relation to
its accuracy, communication and calculation
costs. The simulation results of our approach yield
2 to 4 times better results in position accuracy
than other systems described previously. This level
of performance can be reached using only few
broadcast messages with small and constant size, for
each node in the network.},
AFFILIATION = {Embedded Systems, Univerity of Twente},
URL = {http://wwwhome.cs.utwente.nl/~dulman/docs/paper_austria.pdf}
}
@PROCEEDINGS{Pervasive2004,
BOOKTITLE = {PERVASIVE 2004},
TITLE = {Proceedings of the Second International Conference
on Pervasive Computing ({PERVASIVE} 2004)},
EDITOR = {Alois Ferscha AND Friedemann Mattern},
ISSN = {0302-9743},
ISBN = {3-540-21835-1},
PUBLISHER = {Springer Verlag, Berlin},
SERIES = {Lecture Notes in Computer Science},
VOLUME = {3001},
MONTH = APR,
YEAR = 2004,
CONFERENCE = {PERVASIVE 2004},
LOCATION = {Linz/Vienna, Austria}
}
@INPROCEEDINGS{Hofmeijer04,
AUTHOR = {T. Hofmeijer and S. Dulman and P. G. Jansen and P. J. M. Havinga},
TITLE = {{DCOS}, a {Real-Time} Light-weight Data Centric Operating System},
BOOKTITLE = {{IASTED} Int. Conf. on Advances in Computer Science and Technology ({ACST})},
EDITOR = {S. Sahni},
PUBLISHER = {ACTA Press, Calgary, Canada},
LOCATION = {St. Thomas, Virgin Islands, USA},
MONTH = NOV,
YEAR = {2004},
PAGES = {259-264},
URL = {http://www.ub.utwente.nl/webdocs/ctit/1/0000010f.pdf},
ISBN = {0-88986-437-3},
ABSTRACT = {DCOS is a Data Centric lightweight Operating System for embedded devices. Despite limited energy and hardware resources, it supports a data driven architecture with provisions for dynamic loadable Modules. It combines these with Real-Time provisions based on Earliest Deadline First with a simple but smart resource handling mechanism. We will give an overview of the capabilities of DCOS and we will describe the basics of the main mechanisms.}
}
@INPROCEEDINGS{Hofmeijer04a,
AUTHOR = {T. Hofmeijer and S. Dulman and P. G. Jansen and P. J. M. Havinga},
TITLE = {{AmbientRT} - real time system software support for data centric sensor networks},
BOOKTITLE = {2nd Int. Conf. on Intelligent Sensors, Sensor Networks and Information Processing},
PUBLISHER = {IEEE Computer Society, Washington, DC},
LOCATION = {Melbourne, Australia},
MONTH = DEC,
YEAR = {2004},
PAGES = {61-66},
ISBN = {0-78038894-1},
ABSTRACT = {}
}
@INPROCEEDINGS{Havinga04,
AUTHOR = {Paul Havinga AND Pierre Jansen AND Maria Lijding AND Hans Scholten},
TITLE = {Smart Surroundings},
BOOKTITLE = {Proceedings of the 5th {PROGRESS} Symposium on Embedded Systems},
CONFERENCE = {5th {PROGRESS} Symposium on Embedded Systems},
LOCATION = {Nieuwegein, The Netherlands},
MONTH = OCT,
YEAR = 2004,
PAGES = {64--69},
URL = {http://www.stw.nl/progress/proceedings2004/havinga.pdf},
ISBN = {90-73461-41-3},
ABSTRACT = {Ambient systems are networked embedded systems
integrated with everyday environments and supporting people in
their activities. These systems will create a Smart
Surrounding for people to facilitate and enrich daily life and
increase productivity at work. These systems will be quite
different from current computer systems, as they will be based
on an unbounded set of hardware artefacts and software
entities, embedded in everyday objects or realized as new
types of device. The ubiquitous computing vision has over the
last 10 years inspired research into computing systems and
applications that become pervasively embedded in our everyday
environments, and that bring the unique flexibility of digital
technology to the activities around which our lives evolve.
Caused by rapid progress in technology, this early research
tended to focus on experimental prototypes of infrastructure,
devices, and applications. As the field is progressing, the
most important research challenge and focus of this project is
to develop the fundamental architecture of ubiquitous
computing environments. Our approach to enable ambient systems
depends on highly distributed, reliable, and secure
information systems that can evolve and adapt to radical
changes in their environment, delivering information services
that adapt to the people and the services that use them. These
distributed systems must easily and naturally integrate
devices, ranging from tiny sensors and actuators to hand-held
information appliances. Such devices will be connected
primarily by short-range wireless networks, as well as by
high-bandwidth local backbones.}
}
@ARTICLE{Haartsen04,
AUTHOR = {J.C. Haartsen},
TITLE = {Innovatie in de vrije band: groei of wildgroei?},
JOURNAL = {Nederlands Elektronica- en Radiogenootschap (NERG)},
VOLUME = 69,
NUMBER = 1,
YEAR = 2004
}
@INPROCEEDINGS{Krohn04,
AUTHOR = {Albert Krohn AND Michael Beigl AND Christian Decker AND Uwe Kochendörfer AND Philip Robinson AND Tobias Zimmer},
TITLE = {Inexpensive and Automatic Calibration for Acceleration Sensors},
BOOKTITLE = {Proceedings of the 2nd International Symposium on Ubiquitous Computing Systems (UCS 2004)},
CONFERENCE = {2nd International Symposium on Ubiquitous Computing Systems (UCS 2004)},
LOCATION = {Tokyo, Japan},
MONTH = NOV,
YEAR = 2004,
AFFILIATION = {TECO},
URL = {http://www.teco.edu/~krohn/krohn_accl.pdf},
ABSTRACT = {In this paper, we present two methods for calibration
of acceleration sensors that are inexpensive, in-situ, require
minimum user interaction and are targeted to a broad set of
acceleration sensor applications and devices. We overcome the
necessity of orthogonal axes alignment by extending existing
calibration methods with a non-orthogonal axes model. Our
non-orthogonal method can furthermore be used to enable
automatic calibration for 1- or 2-axes accelerometers or realize
a simultaneous mass-calibration of sensors with minimum effort.
The influence of noise to the presented calibration methods is
analysed.}
}
@INPROCEEDINGS{Krohn04b,
AUTHOR = {Albert Krohn AND Michael Beigl AND Sabin Wendhack},
TITLE = {SDJS: Efficient Statistics in Wireless Networks},
BOOKTITLE = {Proceedings of the 12th IEEE International Conference on Network Protocols (ICNP)},
CONFERENCE = {12th IEEE International Conference on Network Protocols (ICNP) 2004},
LOCATION = {Berlin, Germany},
MONTH = OCT,
YEAR = 2004,
AFFILIATION = {TECO},
URL = {http://www.teco.edu/~krohn/sdjs.pdf},
ABSTRACT = {Synchronous Distributed Jam Signalling (SDJS) is a new
transmission scheme targeted to highly mobile and ad hoc
wireless systems. It is based on the synchronous, parallel
and superimposing emission of jam signal on the physical
layer. SDJS is intended to be implemented as a feature on
existing standards. It enables those system with the ability
to fast estimate statistical parameters. This paper presents
SDJS in general and then focuses on the application to estimate
the parameter number of devices in a mobile setting.
We studied SDJS and its application through a mathematical
model and simulations and proved the idea in a realworld
implementation on a mobile network, where we estimated
the number of devices in real time (within 5ms), increasing
the estimation speed compared to traditional approaches
by factor 1000.}
}
@PROCEEDINGS{DBLP:conf/arcs/2005,
KEY = {DBLP:conf/arcs/2005},
EDITOR = {Michael Beigl and
Paul Lukowicz},
TITLE = {Systems Aspects in Organic and Pervasive Computing - ARCS
2005, 18th International Conference on Architecture of Computing
Systems, Innsbruck, Austria, March 14-17, 2005, Proceedings},
BOOKTITLE = {ARCS},
PUBLISHER = {Springer},
SERIES = {Lecture Notes in Computer Science},
VOLUME = {3432},
YEAR = {2005},
MONTH = MAR,
ISBN = {3-540-25273-8},
BIBSOURCE = {DBLP, http://dblp.uni-trier.de}
}
@INPROCEEDINGS{Decker05a,
AUTHOR = {Christian Decker AND Michael Beigl AND Albert Krohn},
TITLE = {A File System for System Programming in Ubiquitous Computing},
BOOKTITLE = {Proceedings of the 18th International Conference on Architecture of Computing Systems {(ARCS 2005)}},
CONFERENCE = {18th International Conference on Architecture of Computing Systems (ARCS 2005)},
DATE = {March 14-17 2005},
YEAR = 2005,
MONTH = MAR,
LOCATION = {Insbruck, Austria},
PAGES = {249-264},
URL = {http://www.teco.edu/~cdecker/pub/decker_arcs05.pdf},
ABSTRACT = {In Ubiquitous computing small embedded sensor and computing nodes
are one of the main enabling technologies. System programming for
such small embedded systems is a challenging task involving
various hardware components with different characteristics. This
paper presents a file system for sensor nodes platforms providing
a common organization structure and a lightweight and uniform
access model for sensors and all other resources on sensor nodes.
This mechanism forms an abstraction from different hardware, makes
functions reuseable and simplifies the development on such
systems. With ParticleFS an file system implementation on a sensor
node platform is shown. As an example a telnet application running
on sensor nodes was implemented demonstrating the usage of the
approach for system programming on such platforms.}
}
@INPROCEEDINGS{Krohn05a,
AUTHOR = {Albert Krohn AND Tobias Zimmer AND Christian Decker AND Michael Beigl},
TITLE = {Collaborative Sensing in a Retail Store using Snychronous Distributed Jam Signalling},
BOOKTITLE = {Proceedings of the the 3rd International Conference on Pervasive Computing 2005},
CONFERENCE = {the 3rd International Conference on Pervasive Computing 2005},
LOCATION = {Munich, Germany},
MONTH = MAY,
YEAR = 2005,
URL = {http://www.teco.edu/~krohn/collaborative.pdf},
ABSTRACT = {The retail store environment is a challenging application area
for Pervasive Computing technologies. It has demanding base conditions
due to the number and complexity of the interdependent processes involved.
We present first results of an ongoing study with dm-drogerie
markt, a large chemist’s retailer, that indicate that supporting product
monitoring tasks with novel pervasive technology is useful but still needs
technical advances. Based on this study, we uncover problems that occur
when using identification technology (such as RFID) for product monitoring.
The individual identification struggles with data overload and
inefficient channel access due to the high number of tags involved. We
address these problems with the concept of Radio Channel Computing,
combining approaches from information theory, such as the method of
types and multiple access adder channels. We realise data pre-processing
on the physical layer and significantly improve response time and scalability.
With mathematical formulation, simulations and a real world
implementation, we evaluate and prove the usefulness of the proposed
system.}
}
@INPROCEEDINGS{Krohn05b,
AUTHOR = {Albert Krohn AND Michael Beigl AND Mike Hazas AND Hans-Werner Gellersen},
TITLE = {Using Fine-Grained Infrared Positioning to Support the Surface-Based Activities of Mobile Users},
BOOKTITLE = {Proceedings of the 5th International Workshop on Smart Appliances and Wearable Computing {(IWSAWC 2005)}},
CONFERENCE = {5th International Workshop on Smart Appliances and Wearable Computing {(IWSAWC 2005)}, held with ICDCS 2005},
LOCATION = {Columbus, Ohio, USA},
MONTH = JUN,
YEAR = 2005,
PAGES = {463--468},
PUBLISHER = {IEEE Computer Society},
ADDRESS = {Washington, DC, USA},
DATE = {June 10, 2005},
URL = {http://www.teco.edu/~krohn/infrared.pdf},
ABSTRACT = {Knowledge of the fine-grained location and orientation
of devices on a surface can be used to enhance the
surface-based computing tasks of mobile users in the home
and workplace. However, existing systems which provide
surface-based positioning information are often not a practical
solution for mobile users, since the systems all rely
upon pre-installed and calibrated environmental infrastructure.
In this paper, we present prototype positioning devices
for surfaces which do not rely on such infrastructure. We
show that inexpensive infrared transducers can be used to
effectively sense relative location and orientation of surface
devices. We evaluate the novel approach of using intensity
of light pulses for fine-grained location measurements.}
}
@INPROCEEDINGS{Decker05b,
AUTHOR = {Christian Decker AND Albert Krohn AND Michael Beigl AND Tobias Zimmer},
TITLE = {The Particle Computer System},
URL = {http://www.teco.edu/%7Ekrohn/spots.pdf},
BOOKTITLE = {IPSN Track on Sensor Platform, Tools and Design Methods for Networked Embedded Systems
(SPOTS). Proceedings of the ACM/IEEE Fourth International
Conference on Information Processing in Sensor Networks 2005},
LOCATION = {Los Angeles, USA},
DATE = {25-27 April 2005},
NOTE = {to appear},
MONTH = APR,
YEAR = 2005,
ABSTRACT = {This paper presents a sensor-based, networked embedded
system, referred to as the Particle computer system. It is
comprised of tiny wireless sensor nodes, capable of communication
with each other, as well as connectivity with backend, PCbased
systems, thereby facilitating software development and
data analysis in an integrated systems package. The core design
principles of the sensor nodes enable operation in very mobile
settings and truly ad-hoc, peer-to-peer interoperation without the
intervention of a master or explicit middleware layer. The two
main system properties highlighted in this paper are: 1) information
distribution to all components within the system and 2) the
usage of a common communication language in all system components.
This language has been proprietarily developed for the
Particle system and is known as ConCom. As a result of these
system properties, we have found the Particle system to be very
extensible and applicable in many everyday scenarios. The paper
presents insights to the implementation of the Particle computer
system, including software development and data analysis capabilities,
and the overall system integration.}
}
@INPROCEEDINGS{Krohn05c,
AUTHOR = {Albert Krohn AND Michael Beigl AND Christian Decker AND Tobias Zimmer},
TITLE = {TOMAC- Real-Time Message Ordering in Wireless Sensor Networks
Using the MAC Layer},
URL = {http://www.teco.edu/%7Ekrohn/tomac.pdf},
BOOKTITLE = {Proceedings of the 2nd International Workshop on Networked Sensing Systems (INSS)},
CONFERENCE = {2nd International Workshop
on Networked Sensing Systems (INSS)},
LOCATION = {San Diego, USA},
DATE = {June 27 - 28, 2005},
YEAR = 2005,
MONTH = JUN,
ABSTRACT = {The ordering of messages according to a given time measure is a largely discussed topic. Nevertheless,
wireless or wired systems considering the order of messages do not use the access layer to accomplish this
task. In this paper, we discuss the use of non-destructive bit-wise arbitration on the MAC layer for real-time
message ordering in wireless sensor networks. With this access method, it is possible to use the measure
of elapsed waiting time of a message as an input parameter to the channel access. Through the use of
adaptive priorities, messages carrying older information get higher priorities and can therefore gather access
¯rst. This hard real-time message ordering mechanism realizes message ordering for one-hop distance mesh
topologies. Additionally it is an ideal basis for message-ordering transport protocols. We discuss the system
in the parameter context of WiFi (IEEE 802.11a) and Zigbee (IEEE 802.15.4) and successfully implemented
the access method on a wireless sensor network.}
}
@MASTERSTHESIS{Root04,
AUTHOR = {Ilja Root},
TITLE = {Adaptive Routing-Verfahren in ubiquitären Umgebungen},
SCHOOL = {Telecooperation Office ({TecO}), University of Karlsruhe},
YEAR = 2004,
MONTH = DEC,
SUPERVISOR = {Albert Krohn}
}
@INPROCEEDINGS{Hazas05a,
AUTHOR = {Mike Hazas and Christian Kray and Hans Gellersen and Henoc Agbota and Gerd Kortuem and Albert Krohn},
TITLE = {A relative positioning system for co-located mobile devices},
BOOKTITLE = {MobiSys '05: Proceedings of the 3rd international conference on Mobile systems, applications, and services},
YEAR = {2005},
ISBN = {1-931971-31-5},
PAGES = {177--190},
LOCATION = {Seattle, Washington},
DOI = {http://doi.acm.org/10.1145/1067170.1067190},
PUBLISHER = {ACM Press},
ADDRESS = {New York, NY, USA},
URL = {http://www.teco.edu/~krohn/ultrasound.pdf},
ABSTRACT = {If a mobile computing device knows how it is
positioned and oriented in relation to other devices nearby, then
it can provide enhanced support for multi-device and multi-user
interactions. Existing systems that provide position information
to mobile computers are reliant on externally deployed
infrastructure, such as beacons or sensors in the environment. We
introduce the Relate system, which provides fine-grained relative
position information to co-located devices on the basis of
peer-to-peer sensing, thus overcoming dependence on any external
infrastructure. The system is realised as a hardware/software
plug-in, using ultrasound for peer-to-peer sensing, USB to
interface with standard mobile devices, and data abstraction and
inferencing to map sensor data to a spatial model that maintains
both quantitative and qualitative relationships. We present a set
of services and applications to demonstrate the utility of the
system. We report experimental results on the accuracy of the
relative position and orientation estimates, and other aspects of
system performance.}
}
@INPROCEEDINGS{Berkvens05,
AUTHOR = {Winfried A. H. Berkvens and Arjan Claassen and Joep P. van Gassel and Alexander Sinitsyn},
TITLE = {Media Distribution in a Pervasive Computing Environment},
BOOKTITLE = {Proceedings of the Third IEEE International Conference on Pervasive Computing and Communications Workshops {(PERCOMW'05)}},
CONFERENCE = {PerWare 2005 (In conjunction with 3rd IEEE PerCom 2005 Conference)},
LOCATION = {Kauai, HI, USA},
YEAR = 2005,
MONTH = MAR,
ISBN = {0-7695-2300-5},
PAGES = {204--208},
DOI = {http://dx.doi.org/10.1109/PERCOMW.2005.47},
PUBLISHER = {IEEE Computer Society},
ADDRESS = {Washington, DC, USA},
AFFILIATION = {Philips Research},
ABSTRACT = {Distribution of media in the fast growing world of
digital stored content and multimedia supporting devices with
connectivity, calls for a new media distribution architecture.
The user should be provided with the experience of having an
overview of his full media collection, regardless of the time,
the place, and the connectivity. The architecture presented in
this paper, fulfils these needs and can cooperate furthermore
with non-compliant devices.},
URL = {http://ieeexplore.ieee.org/iel5/9593/30313/01392832.pdf?tp=&arnumber=1392832&isnumber=30313}
}
@ARTICLE{Hummels04a,
AUTHOR = {Caroline Hummels and Aadjan van der Helm},
TITLE = {ISH and the search for resonant tangible interaction},
JOURNAL = {Personal Ubiquitous Comput.},
VOLUME = {8},
NUMBER = {5},
YEAR = {2004},
ISSN = {1617-4909},
PAGES = {385--388},
DOI = {http://dx.doi.org/10.1007/s00779-004-0303-x},
PUBLISHER = {Springer-Verlag},
ADDRESS = {London, UK},
URL = {http://delivery.acm.org/10.1145/1030000/1023825/40080385.pdf?key1=1023825&key2=7499251311&coll=GUIDE&dl=GUIDE&CFID=57720310&CFTOKEN=82969465},
AFFILIATION = {Industrial Design Engineering (ID-StudioLab), Delft University of Technology}
}
@INPROCEEDINGS{Hummels04b,
AUTHOR = {C.C.M Hummels},
TITLE = {Educating interaction, experience and diversity},
EDITOR = {P. Loyd AND N. Roozenburg AND C. McMahon AND L. Brodhurst},
BOOKTITLE = {The changing face of design education; Proceedings of the 2nd International Engineering and Product Design Education Conference},
YEAR = 2004,
MONTH = SEP,
PAGES = {247-254},
LOCATION = {Delft, The Netherlands},
AFFILIATION = {Industrial Design Engineering (ID-StudioLab), Delft University of Technology},
ABSTRACT = {When we look at the developments within design over the last years, two major buzzwords
emerge: interaction and experience. At the Faculty of Industrial Design
Engineering we try to anticipate and respond to these directions in design tuning our
assignments towards experience and interaction and by developing new design tools,
techniques and even a new structure for our design courses. These tools, techniques and
courses do not only aim at supporting and enhancing interaction and experience, they
also aim at diversity. Because experiences are highly personal, we believe that diversity
is one of the key-issues to be addressed [1]. The new structure, called the Boulevard of
Inspiration, trains design students to take advantage of and expand their personal
competencies, capitalise on their drive and passion and explore an abundant number of
tools and techniques especially through the first phases of the design process in order to
gain a rich variety of products, which fit the diversity of users.
In this paper we will show a few of our achievements and discuss that designing for
interaction and experience using the Boulevard of Inspiration and design techniques
such as Tinkering and IA-Cards, seems a tempting, rewarding and feasible concept for
contemporary design education.},
URL = {http://www2.io.tudelft.nl/iepde04/Documents%20for%20Downloads/Final%20Papers/EF_Hummels.pdf}
}
@INPROCEEDINGS{Keyson04a,
AUTHOR = {D. V. Keyson and P. Ross},
TITLE = {Designing Expressive Tangible Interaction},
BOOKTITLE = {The Sense of Contact VI (Proc. Sensor workshop for industry and science)},
CONFERENCE = {The Sense of Contact VI},
YEAR = 2004,
MONTH = MAR,
LOCATION = {Wageningen, The Netherlands},
AFFILIATION = {Industrial Design Engineering (ID-StudioLab), Delft University of Technology},
EDITOR = {G.C.M. Meijer}
}
@INPROCEEDINGS{Vastenburg04a,
AUTHOR = {M. Vastenburg AND D.V. Keyson AND H. de Ridder},
TITLE = {Interrupting People at Home},
BOOKTITLE = {Procedings of the IEEE 2004 International Conference on Systems, Man and Cybernetics},
MONTH = OCT,
YEAR = 2004,
CONFERENCE = {IEEE 2004 International Conference on Systems, Man and Cybernetics},
LOCATION = {The Hague, The Netherlands},
ABSTRACT = {Several factors were examined towards
considering what influences users’ acceptability of
alerting and informational messages in a field study
conducted at ten homes. Through the simulation study
message urgency was found to be a better predictor of
acceptability than the degree of user engagement during
ongoing activities. A model is proposed for including a
range of additional factors expected to influence
acceptability. The factors will be examined in
forthcoming studies.},
URL = {http://static.studiolab.io.tudelft.nl/gems/vastenburg/IEEESMC2004IPAH.pdf}
}
@INPROCEEDINGS{Keyson05a,
AUTHOR = {David Keyson AND Miguel Bruns Alonso AND Marco Rozendaal AND Philip Ross},
TITLE = {Tangible Interaction with Digital Media},
BOOKTITLE = {Proceedings of the 11th International Conference on Human-Computer Interaction {(HCI'05)}},
CONFERENCE = {11th International Conference on Human-Computer Interaction (HCI'05)},
LOCATION = {Las Vegas, USA},
MONTH = JUL,
YEAR = 2005
}
@INPROCEEDINGS{Dijk04,
AUTHOR = {Gert J. A. van Dijk and Marinus G. Maris},
EDITOR = {Edward M. Carapezza},
TITLE = {Wireless sensor network for mobile surveillance systems},
PUBLISHER = {SPIE},
YEAR = {2004},
MONTH = NOV,
BOOKTITLE = {Unmanned/Unattended Sensors and Sensor Networks},
VOLUME = {5611},
PAGES = {185-191},
LOCATION = {London, United Kingdom},
URL = {http://link.aip.org/link/?PSI/5611/185/1},
AFFILIATION = {TNO},
ABSTRACT = {Guarding safety and security within industrial,
commercial and military areas is an important issue nowadays.
A specific challenge lies in the design of portable
surveillance systems that can be rapidly deployed, installed
and easily operated. Conventional surveillance systems
typically employ stand alone sensors that transmit their data
to a central control station for data-processing. One of the
disadvantages of these kinds of systems is that they generate
a lot of data that may induce processing or storage problems.
Moreover, data from the sensors must be constantly observed
and assessed by human operators. In this paper, a surveillance
concept based on distributed intelligence in wireless sensor
networks is proposed. In this concept, surveillance is
automatically performed by means of many small sensing devices
including cameras. The requirements for such surveillance
systems are investigated. Experiments with a demonstration
system were conducted to verify some of the claims made
throughout this paper.},
URL = {http://spiedl.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=PSISDG005611000001000185000001&idtype=cvips&prog=normal}
}
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