Spectrum sharing algorithm for device to device communication in cellular networks
Nabisere, Daphine Mwenkanya
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Device-to-Device (D2D) communication is considered as one of the key technologies for 5G wireless communications system, since it oﬀers several advantages compared with traditional cellular networks, i.e. low end-to-end latency and high spectral eﬃciency. By allowing underlaying direct D2D communications, a D2D link which reuses the spectral resources of a cellular user causes increased interference to this cellular link. In this work, we consider Quality of Service (QoS) as a guarantee for Device to Device (D2D) users co-existing with a cellular system where the D2D communication links are sharing radio spectrum resources with macrocell users in the downlink. Despite the lofty advantages associated with D2D communications, one major concern is the resulting interference from the D2D users, which should not infringe on the service quality requirements of the User Equipments (UEs). In this work, we investigate the scenario in which D2D communications operates simultaneously with downlink transmissions from the Evolved Node B (eNB). This project proposes a spectrum sharing algorithm that minimizes on the intracell interference. The Base Station (BS) chooses suitable multiple D2D users that are allowed to share a given cellular user’s radio resources using a distance based selection criteria. Our results show increased total cell spectral eﬃciency with the algorithm and all users have a guarantee of achieving their QoS requirements.