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As the number of small cells is increased to improve mobile network capacity, disparity in the traffic load between small cells will unexpectedly widen, and then user throughput in a small cell with high traffic load will decrease. We propose a novel coverage control method that adaptively controls cell coverage for areas where users are densely located by using cell-specific beamforming with multiple...
The use of mobile data is rapidly increasing along with the popularity of smartphones and tablets. The use of indoor data, especially, is expected to be further increased. Indoor cell evolved Node Bs (eNBs) are being installed and they are expected to increase the areas overlaid by indoor and outdoor cells to offload indoor mobile data. We confirmed increases in the handover (HO) failure rates from...
In LTE, uplink (UL) transmit power control is important to mitigate the UL aggregate interference from all femtocells to the macrocell, which is increased as the number of femtocells is increased. We propose an UL power control method for LTE femtocells adaptively setting target received power by using the aggregation of the resource usage of femtocells. With this method, when the aggregate resource...
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