This demonstration shows the actual application of our wireless AMI[1] system, AMR Xpider. This system consists of a sink node and multiple relay nodes. Hundreds of sensing nodes, which are connected to the relay node, transfer metering data to the MDMS (meter data management system). A total of 20,000 AMR Xpider units have been installed in apartments in South Korea for gas metering during the past three years. The AMR Xpider units are used for actual billing purposes. They operate with battery life of at least five years (generally, around seven years), with an average communication success rate of 98%.

Traditionally, Internet applications have been identified by using predefined well-known ports with questionable accuracy. An alternative approach, application-layer signature mapping, involves the exhaustive search of reliable signatures but with more promising accuracy. With a prior protocol knowledge, the signature generation can guarantee a high accuracy. As more applications use proprietary protocols, it becomes increasingly difficult to obtain an accurate signature while avoiding time-consuming and manual signature generation process. This paper proposes an automated approach for generating application-level signature, the LASER algorithm, that does not need to be preceded by an analysis of application protocols. We show that our approach is as accurate and efficient as the approach that uses preceding application protocol analysis.