Heterogeneous 5G networks that consist of dense deployment of macro base stations, small base stations and device-to-device communications play a central role in improving the spectral efficiency and the delay performance of real-time applications. Enhanced inter-cell interference coordination based on time-domain coordination mitigates the downlink interference at the small base station users’ equipment but degrades the delay performance of the macro base station users’ equipment. In this work we exploit the inactive users’ equipment to serve as relays between the small base station and the macro base station users’ equipment which ensures that the delay requirements of real time users are achieved.
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