The aim of this Master Thesis is to present the investigation results of the different routing schemes that are used in opportunistic networks, the so-called opportunistic routing schemes. In special the routing scheme with mobile infrastructure DataMULEs is subject of an exhaustive study. Opportunistic routing schemes are from great interest and the subject of several studies, as they offer the possibility to communicate networks that cannot be successfully connected using traditional routing schemes. They allow communications in very sparse networks and also where traditional end- to-end transmissions are not possible. This work begin with the description and characteristics of opportunistic networks and opportunistic routing schemes, it is also presented an extensive description of the classification for these schemes. Furthermore, in this work an important interest is given to the routing schemes that used mobile infrastructures in its communication, such as Message Ferrying and DataMULEs. Finally the main focus is given to two study cases of the DataMULEs routing scheme, they were in detail analyzed and their features and functionality were addressed to summaries the benefits.