Military Communications and Information Technology: A Trusted ...

Chapter 3: Information Technology for Interoperability and Decision...
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the RM responsible for reasoning about the event and MD that forwards the notifications
to subscribed public safety services.
The implementation of SIP server for ENS is based on the SIP Express Router
software (SER) [7] and its capability to interface with external software modules
through the inter-process communication mechanisms. The SER was used because
of its flexibility due to its high modularization and programmability of core functions.
The developed CM provides the interface between SER and RM. It basically
works as a translator of SIMPLE messages to the remote procedure calls based
on Web Service technology. The translator was needed because of requirements
of RM software, which provides Web Service interface only. Additionally the CM
processes data about events and feeds them to the ER. The CM was implemented
as a standalone program linked with “libpq” library available in the PostgreSQL
package [8]. ER uses PostgreSQL 8.4.1 relational database system. The system environment
for notification module is provided by Slackware Linux 12.0 operating
system. The more detailed description of ENS service can be found in [3].
Event reports are prepared on a mobile terminal running dedicated client
application. The client software provides graphical user interface (see Fig. 2) which
helps to describe the event by assigning observed circumstances to the predefined
types (e.g. event results like leakage of dangerous substance, person jammed
in the vehicle, etc.).
Figure 2. Graphical user interface view
ENS client was created as an application dedicated for the Android platform. User
with the graphical interface indicates: event location, its type and time of occurrence.