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Partial Interference Cancellation in Heterogeneous LTE-Advanced Networks

机译：异构LTE-Advanced网络中的部分干扰消除

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摘要

In LTE networks, picocells are deployed to take over load from macrocells in areas of high user density or weak coverage. Their support comes at the cost of severe intercell interference if single frequency reuse is implemented. In this paper, a cooperative interference mitigation scheme is presented that combines the theoretical work on rate splitting of Han and Kobayashi with the transmission of MIMO-layers as it is defined in LTE. Two users from different cells form a cooperating pair. A cell-edge user detects a part of the interference such that the effective interference is decreased. Thus, it can be served at a higher data rate. This work focuses on an asymmetric scenario in which a cell-edge user and a cell-center user of neighboring cells form a cooperating pair. Simulations show that the cell-edge user can significantly improve its spectral efficiency compared to treating the whole interference as noise with only small losses for the cell-center user. The proposed scheme uses the tools available in LTE and adds only little overhead for the cooperation.
机译：在LTE网络中，在用户密度高或覆盖范围较弱的区域中，部署了微微小区来接管宏小区的负载。如果实施单频重用，它们的支持将以严重的小区间干扰为代价。本文提出了一种协作干扰缓解方案，该方案将关于Han和Kobayashi的速率分离的理论工作与LTE中定义的MIMO层传输相结合。来自不同小区的两个用户组成一个合作对。小区边缘用户检测到干扰的一部分，从而降低了有效干扰。因此，可以更高的数据速率提供服务。这项工作的重点是非对称场景，其中相邻小区的小区边缘用户和小区中心用户形成协作对。仿真表明，与将整个干扰视为噪声相比，小区边缘用户可以显着提高其频谱效率，而对于小区中心用户则只有很小的损失。所提出的方案使用了LTE中可用的工具，并且仅增加了很少的合作开销。

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