In recent years, the efficient design of Wireless Sensor Networks (WSN) has become one of the fundamental fields of research. These networks are made up of a large number of sensor nodes characterized by a limited amount of resources so, the energy aspect is a key point in their development. MAC protocols play an important role in energy management, trying to minimize overhead of the physical layer reducing the energy wasted in preamble transmission. In this paper, we have implemented two different MAC protocols on various scenarios of WSNs by using OMNeT++ simulator in combination with INET framework. Our experiments show a comparison between two MAC protocols in terms of received packets and power consumption among networks’ nodes.
The problem of leading dangerous missions or rescue missions in places where some heart quake or tsunami can destroy building, roads and network structures is always becoming a hot issue specially considering how to perform actions to save people in the smallest amount of time and considering that often the actions need to be performed in a distributed way among more regions affected by the disaster. At this purpose, robots and networked robots' systems could be a possible way to support human actions in order to fast the rescue process and to reduce the risk for human operators. This work considers a networking protocol to support the coordination of mobile robots with different capabilities in order to reduce the space discovery time to find the people to rescue and to help them to move out from the destroyed region. The protocol try to support a multi-task allocations considering the distributions of tasks and of robots in the space and trying to reduce the overall cost in terms of rescue time and control overhead in the team coordination.
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