Table 1: Overview of the hardware specifications and software versions.

Name Sensor node Application servers Database server

CPU Geode(TM) AMD Athlon (64) X2 Dual-core AMD
Integrated Dual core processor Processor 2212
CPU speed 498.095 MHz 1000 MHz 2010.325 MHz
RAM 256 MB 2048 MB 4096 MB
Linux Kernel version 2.6.30-voyage 2.6.38-11-generic 2.6.18-6-amd64
Java version 1.6.0u21-b06 1.6.0u21 1.6.0u16-b01
OSGi version Apache felix 3.0.1 Apache felix 3.0.1 Apache felix 3.0.1