Sensor Networks’ Integration - Application and Multidisciplinary Aspects of Wireless Sensor Networks - page 107

• Efficient WS&AN island solutions consisting of a set of cross-optimized and
energy-aware protocol stacks including an ultra low-power multimode trans-
ceiver targeting 5 nJ/bit.
• Pan European test platform , enabling large-scale experimental evaluation of the
SENSEI results and execution of field trials - providing a tool for long-term
evaluation of WS&AN integration into the Future Internet.

5.3.2.1 Initial SENSEI Architecture

The high-level overview of the SENSEI architecture is given in Fig. 5.2 . The central
part of the architecture is the SENSEI (Real-World) Resource layer. This layer pro-
vides a set of interfaces that applications and services use to interact with the physical
world. Within the SENSEI Resource Layer, the main concept is that of a resource.
A resource is a conceptual representation of any information source that enables
real-world sensing or has the ability to act upon the environment and entities within
it. The concept covers not just the actual entities that have direct access to the physi-
cal world, but also the entities with indirect access acquired via aggregation, fusion,
or inference from other SENSEI Resources. All WS&ANs are presented by their
descriptions (Resource Description) detailing the capabilities of the corresponding
WS&ANs including location, access policies, available operations, type of informa-
tion produced, etc.
The SENSEI resource layer interacts with the communication layer to map all
requests received from the applications and services to appropriate communication
channel. SENSEI community management is responsible for management of all
SENSEI entities.

Application Layer

Context Aware /
Control Applications

Management
Applications

SENSEI (Real World) Resource Layer

SENSEI
Support
Services

SENSEI
Community
Management

SENSEI
Resources

Communication Services Layer

Fig. 5.2 High-level overview of SENSEI architecture