Video transmission over IP networks requires appropriate conditions of quality of service, in order to ensure the integrity of the image, which still represents a challenge to be overcome in wireless mesh networks due to traffic capacity limitations inherent to its architecture. In this work we evaluate the performance of high-resolution video over multi-hop mesh networks and we propose a suitable GOP size for encoding video to be streamed, based on traffic conditions to minimize the loss of quality. Experiments were carried out in a wireless mesh network planned for real testing within a 1500m2area of the main UFAM campus, using the IEEE 802.11a and 802.11n network standards.

Video transmission over IP networks requires appropriate conditions of quality of service, in order to ensure the integrity of the image, which still represents a challenge to be overcome in wireless mesh networks due to traffic capacity limitations inherent to its architecture. In this work we evaluate the performance of high-resolution video over multi-hop mesh networks and we propose a suitable GOP size for encoding video to be streamed, based on traffic conditions to minimize the loss of quality. Experiments were carried out in a wireless mesh network planned for real testing within a 1500m2 area of the main UFAM campus, using the IEEE 802.11a and 802.11n network standards.

Evolution strategies (ESs) have been successfully applied to dynamic system identification; that is, to tuning the parameters of (models of) dynamic systems. At the Renato Archer Research Center (Cenpra), Project AURORA is developing a semiautonomous lighter-than-air craft for aerial inspection and environmental monitoring. The development of an autonomous control system for the target airship requires an accurate dynamic model of it. An ES has been used to identify values for the parameters of such a model, and some simulation results are presented here. The approach proposed has the final objective of being applied to real flight data to identify the parameters of the airship itself.

Internet robotic systems have a different role in the use and development of aerial robots compared to that for ground robots. While for ground robotic vehicles, Internet is useful for remote operation or to make remote development, in aerial vehicles, in addition, the safety aspect must be considered very carefully. This paper addresses the requirements to the specific case of Internet aerial robots. It describes the conceptual and implementation aspects of an Internet-based software architecture for the AURORA unmanned autonomous airship project, showing its use in the different project phases.