Wireless Site Surveillance System

Abstract: In order to monitor telecommunications base stations more closely more and new sensors
are needed. Installing new sensors can however prove difficult and costly since it will
most probably include installing wiring to and from these sensors.
This master thesis examines the possibility to use existing wireless technology to con-
nect such sensors within a base station and to a broader surveillance system. A small
sensor node is designed, built and tested.
The Mulle wireless platform is used to collect sensor data and communicate over Blue-
tooth. The receiving end is an Internet connected, PAN-GW enabled unit running python
and acting site controller.
Communication is kept secure with pre-shared secrets and AES encryption, three-way
handshakes, sequence numbering and heartbeats.
Temperature and humidity is measured at very low power for proof-of-concept. The
site controller communicates with OSS when preset thresholds are crossed.
Heartbeats and watchdog timers makes the system robust and reliable.
It is shown that the Mulle platform is well suited for implementing wireless battery
powered sensors using Bluetooth communication.