Sensor Networks’ Integration - Application and Multidisciplinary Aspects of Wireless Sensor Networks - page 106

and privacy support. The authors defined a set of needed core functionalities in the
CommonSense domain. The most important function is the
Service Control Function (SCF) which controls the interaction with all external
parties. High-level service requests from applications are analyzed by the SCF with
the support from the Request Analyzer (RA) and sensors, sensor networks, or existing
sensor mash-ups. The Request Analyzer (RA) is a decision engine that can decom-
pose a request from an application to multiple individual information requests, and
then recompose an aggregated answer. The output from the RA is used to search
the SR (a database containing registration descriptions of all attached WSNs) and
find WSNs with matching capabilities. Once suitable WSNs are identified, the SCF
issues either standardized low-level service requests or special legacy WSN
requests using a mediating function (called Service Gateway). The WSN provider
functionality on the Application enablers' plane is represented by Service Gateways
(SGW). The SGW represents atomic sensor network services and is responsible for
mapping the SCF requests onto the sensor network technology specific commands,
which is a core requirement for interoperability. The CommonSense domain enti-
ties will use third-party services as an additional tool in creation of application
responses. The applications can also use the third-party services directly if they are
required by the application logic. Some of the already existing services provided by
the network are considered as the third-party services in the network of the future.
Examples of the third-party service providers are presence servers, location providers,
object identity resolution providers, etc.
The communication services plane provides the underlying secure and reliable
communications services to the Application enablers and the Application plane and
enables interaction of all their entities across the different domains. The
Communications service plane is divided into three domains: Peripheral refers to
the local connectivity functionality (e.g., Bluetooth, Zigbee), Access refers to the
wireless and wired last hop connectivity functionality (e.g., WCDMA, ADSL), and
Core refers to the actual backbone.

5.3.2 SENSEI

FP7 SENSEI ( www.sensei-project.eu ) is a large integrated project under the EU
FP7 program. It has the following objectives: to create a common, global, WS&AN
(wireless sensor and actuator networks) framework that will enable making the
WS&AN available to services and applications via universal service interfaces. The
following are the main planned tangible results of the project:

• A highly scalable architectural framework with corresponding protocol solu-
tions that enable easy plug-and-play integration of a large number of globally
distributed WS&AN into a global system - providing support for network and
information management, security, privacy and trust, and accounting.
• An open service interface and corresponding semantic specification to unify the
access to context information and actuation services offered by the system for
services and applications.