Résumé:
RFID and WSN technologies are widely used in
today’s pervasive computing. In Wireless Sensor Networks,
sensor nodes sense the physical environment and send the sensed
data to the sink by multi-hops. WSN are used in many
applications such as military and environment monitoring. In
Radio Frequency Identification, a unique ID is assigned to a
RFID tag which is associated with a real world object. RFID
applications cover many areas such as Supply Chain
Management (SCM), healthcare, library management, automatic
toll collection, etc. The integration of both technologies will bring
many advantages in the future of ubiquitous computing, through
the provision of real-world tracking and context information
about the objects. This will increase considerably the automation
of an information system. In order to process the large volume of
data captured by sensors and RFID readers in real time, a
middleware solution is needed. This middleware should be
designed in a way to allow the aggregation, filtering and grouping
of the data captured by the hardware devices before sending
them to the backend applications. In this paper we demonstrate
how our middleware solution called FlexRFID handles large
amount of RFID and sensor scan data, and executes applications’
business rules in real time through its policy-based Business
Rules layer. The FlexRFID middleware provides easy addition
and removal of hardware devices that capture data, as well as
uses the business rules of the applications to control all its
services. We demonstrate how the middleware controls some
defined healthcare scenarios, and deals with the access control
security concern to sensitive healthcare data through the use of
policies.
