Dynamic TDD support in the LTE-B enhanced Local Area architecture
Dynamic TDD support in the LTE-B enhanced Local Area architecture
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DOI：
10.1109/glocomw.2012.6477639
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发表时间：
2012-12
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影响因子：
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通讯作者：
Bo Yu;S. Mukherjee;H. Ishii;Liuqing Yang
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文献类型：
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作者：
Bo Yu;S. Mukherjee;H. Ishii;Liuqing Yang
自长期演进 (LTE) Rel. 以来，第三代合作伙伴项目 (3GPP) 一直在研究时分双工 (TDD) 中子帧到上行链路 (UL) 或下行链路 (DL) 的动态分配，称为“动态 TDD”。 11 时间范围。与此同时，3GPP 还在对增强型局域 (eLA) 小蜂窝异构架构进行标准化，以将其纳入 LTE-B (LTE Rel. 12)，作为一种解决方案，通过频谱的空间复用为用户终端 (UE) 提供高数据速率和高系统容量。在本文中，我们重点关注 DOCOMO 提出的一种特殊的 eLA 架构，称为 Phantom Cell 架构，它可以选择支持动态 TDD。对于 eLA 小区网络中任意位置的 UE，我们应用随机几何结果来推导任意 UE 的 DL 信号与干扰加噪声比 (SINR) 的分布以及其服务 eLA 基站 (BS) 的 UL SINR 的分布表达式。我们利用这些结果来研究 eLA 小区系统设计的各个方面，以及 SINR 对采用动态 TDD 的 eLA 小区之间的协调程度的敏感性。
The Third Generation Partnership Project (3GPP) has been studying dynamic allocation of sub-frames to uplink (UL) or downlink (DL) in Time Division Duplex (TDD), called `Dynamic TDD,' since the Long Term Evolution (LTE) Rel. 11 timeframe. At the same time, 3GPP is also standardizing Enhanced Local Area (eLA) small-cell heterogeneous architectures for inclusion in LTE-B (LTE Rel. 12) as a solution offering high data rate to user terminals (UEs) along with high system capacity through spatial reuse of spectrum. In this paper, we focus on a particular eLA architecture proposed by DOCOMO, called the Phantom Cell architecture, that has the option to support dynamic TDD. For an arbitrarily-located UE in an eLA cell network, we apply results from stochastic geometry to derive expressions for the distribution of DL signal to interference plus noise ratio (SINR) at an arbitrary UE and the distribution of UL SINR at its serving eLA base station (BS). We use these results to study aspects of eLA cell system design, and the sensitivity of SINR to the extent of coordination across eLA cells employing dynamic TDD.