The OpenIoT Approach to Sensor Mobility with Quality-Driven Data Acquisition Management - Interoperability and Open-Source Solutions for the Internet of Things - page 54

Fig. 4. Example assignment of virtual sensors to MGRS areas. All physical sensors in
a given area are mapped to the corresponding virtual sensor.
their virtual sensor representations, the QoS Manager need to create and maintain
virtual sensor instances that provide sensor data for the X-GSN component.
In order to link geographically close sensor data readings, each geographi-
cal area (in our implementation this is an MGRS area) is represented by one
X-GSN virtual sensor, as shown in Fig. 4 . When a mobile sensor is located inside
a specific area, the QoS Manager component finds a corresponding virtual sensor
which serves as a gateway to the X-GSN. In case this is the first mobile data
source announced in an observed geographical area, the prerequisite for sending
sensor data to the X-GSN is to register a new virtual sensor instance in the
X-GSN, while the area center is defined as the location of the virtual sensor. All
sensor data from mobile ICOs located within a geographical area covered by a
virtual sensor are transmitted to the X-GSN component via this virtual sensor
instance.
When a virtual sensor instance is successfully registered with the X-GSN,
data readings from mobile data sources located in the virtual sensor area can be
Fig. 5. Forwarding sensor readings to the OpenIoT platform