Abstract:Wireless sensor networks (WSN) have been widely used in many applications, such as climate monitoring systems,fire detection, ocean activity monitoring, and smart cities. These networks can be homogeneous or heterogeneous, depending on the types of wireless devices used. WSNs play an important role monitoring and reporting environment information and collecting surrounding context to send it to a sink. The sink acts as a bridge between the WSN and the final user. The sink could be static,such as a base station or a gateway node or could be mobile similar to a drone or an smartphone.When the sink is mobile, the path to reach the sink from any node in the network is obsolete very frequently. Then, the problem to address in this case is how to reach the sink, without consuming to much energy in the network.This paper focus on the networking protocols used to report events to a mobile sink and presents the state of the art in networking protocols to report events to a mobile sink.
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