Relaying results for indoor coverage in long-term evolution and beyond

Future cellular networks aim to improve the data rate to users in office and residential buildings. Wireless relaying is one of the possible solutions. In this approach, a relay is placed inside a building to get around the building penetration path loss. Decode and forward operation is employed for full re-use of the licensed bandwidth with frequency dependent link adaptation. In this paper, we report indoor measurement results using state of the art macrocellular and relay. Orthogonal frequency division duplexing (OFDM) and multiple input multiple output (MIMO) are used in both links. The relay measurements were performed for a single cell three terminal relay network setup. Results show that (a) relay provides better data rate and coverage as compared to macro and (b) feedback can further improve relay coverage. A relay is able to deliver data rate exceeding 40 Mbps to locations well inside the building.