Image Processing Reference
In-Depth Information
12.6 Summary
At the present time, TinyOS is the most mature OS framework for sensor nodes. The component-
based architecture of TinyOS allows an easy composition of SNAs. New components can be added
easily to TinyOS to support novel sensing or transmission technologies or to support upcoming sen-
sor node platforms. MATÉ addresses the requirement to change a sensor node's behavior at runtime
by introducing a VM on top of TinyOS. Via transmitting capsules containing high-level instructions,
a wide range of SNAs can be installed dynamically into a deployed sensor network. TinyDB was devel-
oped to simplify data querying from sensor networks. On top of TinyOS, it provides an easy to use
SQL interface to express data queries and addresses the group of users nonexperienced with writing
embedded C code for sensor nodes. TOSSIM is a simulator for wireless sensor networks based on
the TinyOS framework.
EnviroTrack is an object-based programming model to develop sensor network applications for
tracking activities in the physical environment. Its main feature is dynamical grouping of nodes
depending on environmental changes described by predefined aggregate functions, critical mass, and
freshness horizon. SensorWare is a software framework for sensor networks employing lightweight
and mobile control scripts that allow the dynamic deployment of distributed algorithms into a sensor
network. In comparison to the MATÉ framework, the SensorWare runtime environment supports
multiple applications to run concurrently on one SensorWare node. The MiLAN middleware pro-
vides a framework to optimize network performance, which needs sensing probability and energy
costs based on equations. It is the programmer's decision to weight these equations.
EmStar is a software environment for developing and deploying applications for sensor networks
consisting of  bit embedded Microserver platforms. SeNeTs is a new approach to optimize the inter-
faces of sensor network middleware. SeNeTs aims at the development of energy-saving applications
and the resolving of component dependencies at compile time.
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