Ad-hoc links in cellular networks for public safety communications

Cellular networks are evolving to an increasing number of applications ranging from simple voice calls to video streaming and data transfer. Recently, it has been suggested to extend theses networks to short range communications using device to device links. The aim of such type of operation is to alleviate the data traffic load on cellular networks, and also to provide an alternative option for public safety communications. This paper presents an overview of the potential applications of device to device links in cellular networks and also presents the technical challenges and the potential solutions to implement this feature in near future standards.