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Massive MIMO is envisioned as a promising technology for 5G wireless networks due to its high potential to improve both spectral and energy efficiency. Although the massive MIMO system is based on innovations in the physical layer, the upper layer techniques also play important roles in harvesting the performance gains of massive MIMO. In this article, we begin with an analysis of the benefits and...
Due to the high potential to enhance spectral efficiency and spatial reuse, small cell networks, SCNs, have emerged as a promising solution to improve the capacity of mobile communication systems so as to satisfy the ever growing demand for high data rate services. However, without proper planning, the dense deployment of SCNs may cause severe interference, resulting in limited capacity. In hotspots...
The femtocell network is regarded as an effective approach to provide better services for indoor users with higher capacity. However, the spectrum allocation problem of the femtocell network is challenging for the wireless operator, since the added femtocell tier either requires additional spectrum resource or brings interference to the existing cellular network. In this paper, we consider the methods...
In this paper, we propose a novel scheme to improve the throughput of femtocell networks. The proposed scheme consists of two steps: spectrum allocation for femtocells and dealing with nearby macro-users with access control strategy. Since the positions of femtocells are relatively stable, we firstly deal with inter-femtocell interference and formulate it as an integer programming problem. Then we...
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