MATEC Web of Conferences
Volume 56, 20162016 8th International Conference on Computer and Automation Engineering (ICCAE 2016)
|Number of page(s)||6|
|Section||Modern Communication Technology and Applications|
|Published online||26 April 2016|
Interference Alignment for the Uplink Heterogeneous Cellular Networks
Communication Research Center, Harbin Institute of Technology, Harbin, China
Heterogeneous cellular networks, due to its multi-tier topological structure, provide significant improvements in terms of increased data rates and cell coverage. However, there are important intra-tier and inter-tier interference management problem to be solved. In this paper, we model a two-tier uplink heterogeneous network, which include a macrocell and K overlaid femtocells. Meanwhile we constitute a heterogeneous configuration that each femto BS is equipped with two antennas and the macro BS is equipped with A(2 ≤ A ≤ 2K) antennas. We proved that the sum-DoF outer bound of the network is 4K2/4K ‒ A, and the DoF outer bound for the femtocell and macrocell is (2K‒A)/(4K‒A) and A/(4K‒A) respectively. Moreover, we present the achievable scheme, which is based on interference alignment. The simulation results show that the sum rate of the whole HetNet increases as the number of macro BS’s antennas increases.
© Owned by the authors, published by EDP Sciences, 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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