Browsing by Issue Date, starting with "2007-07"
Now showing 1 - 2 of 2
Results Per Page
Sort Options
- Simulation of IEEE 802.11e in the context of interoperabilityPublication . Cabral, Orlando; Segarra, Alberto; Velez, Fernando JoséThis work provides the specification of a MAC layer simulator that evaluates the service quality in WiFi, and presents initial results as a stand-alone simulator. The simulator will account for inter-working with WiMAX and HSDPA in the context of the IT-MOTION tool. Higher throughputs are found for the FTP service and for the video service, mainly because the frames transmitted in these services are longer than the ones for the voice application. However, the number of supported users is higher for voice. This simulator will allow for tuning-up several parameters like the ones related to how to use BlockACK, normal ACK, and NO ACK policies.
- Applications of Wireless Sensor NetworksPublication . Ferro, João Miguel; Borges, Luís M.; Velez, Fernando J.; Lebres, AntonioWireless Sensor Networks (WSNs) are spreading around in multiple fields of applications because they perform measuring tasks in a flexible way. This paper presents a survey on nowadays research efforts on the application of these WSNs to the automobile industry, to agriculture, and to wearable technologies (healthcare and athletes monitoring). From our practical deployments, it is important to highlight the functionalities for the automotive industry, and the results extracted from our application to a vineyard. Research on wearable technologies constitutes a challenge, and wireless healthcare solutions in the context of fabrics are being addressed.