307 research outputs found
EMMON - EMbedded MONitoring
Despite the steady increase in experimental deployments, most of research work on WSNs has focused only on
communication protocols and algorithms, with a clear lack of effective, feasible and usable system architectures,
integrated in a modular platform able to address both functional and non–functional requirements. In this paper, we
outline EMMON [1], a full WSN-based system architecture for large–scale, dense and real–time embedded monitoring
[3] applications. EMMON provides a hierarchical communication architecture together with integrated middleware and
command and control software. Then, EM-Set, the EMMON engineering toolset will be presented. EM-Set includes a
network deployment planning, worst–case analysis and dimensioning, protocol simulation and automatic remote
programming and hardware testing tools. This toolset was crucial for the development of EMMON which was designed
to use standard commercially available technologies, while maintaining as much flexibility as possible to meet specific
applications requirements. Finally, the EMMON architecture has been validated through extensive simulation and
experimental evaluation, including a 300+ nodes testbed
EMMON: a system architecture for large- scale, dense and real-time WSNs
In spite of the significant amount of scientific work
in Wireless Sensor Networks (WSNs), there is a clear lack of
effective, feasible and usable WSN system architectures that
address both functional and non-functional requirements in an
integrated fashion. This poster abstract outlines the EMMON
system architecture for large-scale, dense, real-time embedded
monitoring. EMMON relies on a hierarchical network architecture
together with integrated middleware and command&control
mechanisms. It has been designed to use standard commercially–
available technologies, while maintaining as much flexibility
as possible to meet specific applications’ requirements. The
EMMON WSN architecture has been validated through extensive
simulation and experimental evaluation, including through a
300+ node test-bed, the largest WSN test-bed in Europe to dat
3rd International Workshop on Object Orientation in Operating Systems
This paper presents a design for the use of DSM techniques and system-supported synchronisation to support shared access to persistent objects in a distributed environment. We adopt a hybrid approach where the system granularity is sometimes pages and sometimes objects. We are interested in providing shared access to small (i.e., less than a page) objects in a general purpose, language-independent environment, and supporting both DSM and RPC object access mechanisms. 1 Introduction Object-oriented systems have traditionally relied on remote procedure calls (RPC) as the fundamental method for accessing remote objects in distributed environments. However, the RPC model of shipping invocations to an object can be limiting, preventing, for example, simultaneous legal accesses to copies of an object on multiple nodes
Using trust for secure collaboration in uncertain environments
The SECURE project investigates the design of security mechanisms for
pervasive computing based on trust. It addresses how entities in
unfamiliar pervasive computing environments can overcome initial
suspicion to provide secure collaboration
3rd International Symposium on Object-Oriented Real-time Distributed Computing (ISORC 2000),
Distributed application programmers rely on
middleware such as CORBA in order to handle the
complexity that arises from the distributed and
heterogeneous nature of the underlying computing
platform. CORBA, in particular, provides a media
streaming mechanism that can be used for media
streaming and for associating QoS requirements with
media streams. Despite defining the interfaces of the
media streaming mechanism, the corresponding
specification does not prescribe how QoS is enforced at
low-level by the middleware. This paper describes the
design and implementation of a QoS architecture, called
Quartz, which has been integrated with CORBA in order
to provide a framework that allows applications to
transfer real-time media in open systems. This framework
is employed to model and simulate a pattern recognition
mechanism for use in an automated manufacturing cell,
which is also described and analysed in this paper
8th World Congress on Intelligent Transport Systems
Modern Urban Traffic Control (UTC) and traffic information systems create considerable
quantities of real-time data. Unfortunately, this data is then frequently discarded or stored in a
proprietary format that makes it difficult to use for purposes such as historical data analysis
or other end-user applications. This paper describes an open architecture for the management
of real-time traffic information that uses a three-tiered structure in conjunction with the
eXtensible Markup Language (XML) in order to allow traffic data to be stored and used by
any number of third party applications. An example of how the architecture was used in
conjunction with a SCATS UTC system to create Dublin?s online urban traffic congestion
map is also described in order to illustrate the effectiveness of this approach
- …