Clustering Concept Using Device-To-Device Communication in Cellular System

We study how direct communication within a group of devices, cluster, can improve the performance of a conventional cellular system. The clusters are formed from devices that are close and communicating with each other, for example, sharing data. The clusters share the radio resources among other devices in the system thus creating a mixed network system comprising directly communicating devices and devices having radio links to and from the base stations. In this kind of a system the additional challenge is to decide when clusters shall use direct communication and when conventional cellular radio links to communicate with each other. Here, in addition to clustering concept description we provide new means to analyse achievable system performance when clustering communication is integrated into a cellular network and especially into an interference limited system.