New Hybrid Gateway for Wireless Sensor Network

摘要

In this paper we will focus on how to use table driven, on demand and tree architecture protocol at the same time by introducing our hybrid gateway. At first we will describe the principal behind our gateway, how the solution is combination between hardware and software. As an example how we use usb wifi card that support Ad-Hoc mode to connect to each other using either AODV or OLSR, and xbee serie 2 for Zigbee. The broadcasting service is ensured by hostapd, the routing by linux deamon in case of olsr and aodv, however in Zigbee case the protocol is embedded in the radio card its self and we use SPI communication "after all the routing is done" to collect data from root card. Afterwards we describe how the data is treated and assembled in one formatted XML file or simply send in formatted way by SMS. After that, we will put our gateway on stressful environment (worst use case scenario) and see its reaction in terms of bandwidth and energy, and if those results are suitable for some applications types of WSN. In this order we will present two use cases of our gateway in real life although it can support more than that by a simple and easy code refactoring, or simply by using linux features.