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Ítem Caracterización del consumo de energía y el desempeño de las aplicaciones streaming sobre redes inalámbricas WLA N(Universidad Icesi, 2008-07-24) Garnica, Juan Pablo; Marín, Andrés; Aedo Cobo, José EdinsonToday’s society requires people to be connected anyplace, anytime, thorough different media, such as test, audio and video. This requirement explains the high adoption rate of streaming applications and wireless LANSs (WLANs), and the increasing research in these topics. This article presents the power consumption characterization for a laptop computer running a streaming multimedia application over a WLAN, as well as the profile for the WLAN performance while the multimedia application is running. We found that the laptop power consumption changes depending of the network adapter in use, and the network performance is related to the type of media being transmitted over the network, to the communication channel conditions, and the protocol stack implementation.Ítem Estudio e implementación de drivers para WIMAX (Worldwide Interoperability Microwave Access) móvil en acompañantes móviles digitales(Universidad Icesi, 2010-11-25T21:59:44Z) Arcila Ramírez, Henry Alberto; Duque Pérez, Eugenio; Aedo Cobo, José EdinsonThe accelerated progress in the mobile industry market has attracted a growing interest in research in the field of wireless communications technologies. Today, the applications and services demand highest connection data transmission rates. The 3G and WiMAX mobile technologies have been proposed to successfully achieve the speed + mobility tradeoff. As Mobile systems are constrained in processing resources, information storage and energy consumption, designers have to take all these characteristics into account when design a system of this type. The present paper is focused on the implementation of mobile systems using WiMAX technology. We study the standard and the required HW/SW resources for the implementation of a specific WiMAX device with the two embedded development systems based on iMXL and PXA-270 available processors. In this study we evaluated the complexity of the implementation of WiMAX connectivity for mobile devices in our local environment, taking into account the Hardware, Software and infrastructure limitations.