For the land deployments the uplink was provided in a
different way. The gateway (the same hardware as for the
sea deployment) is equipped with WLAN and UMTS cards
and is able to choose between them according to application
profiles (based on security, cost, etc.). Additionally as future
logistic WSNs would be tightly integrated with telematics
units, a current telematic unit can be used for data transmission
as well. The telematic unit is additionally providing further
information such as location, ignition state, refrigeration unit
state, etc. This data is provided by the telematic unit operator,
it is accessible over Push Web Services and is integrated with
the WSN data on the Django Web Server.
The user can currently access the information using his web
browser and an RSS feed reader. A diagram created by the
Django Web Server is shown in figure