5G New Radio (NR) Release 15 has been specified in June 2018. It introduces numerous changes and potential improvements for physical layer data transmissions, although only point-to-point (PTP) communications are considered. In order to use physical data channels such as the Physical Downlink Shared Channel (PDSCH), it is essential to guarantee a successful transmission of control information via the Physical Downlink Control Channel (PDCCH). Taking into account these two aspects, in this paper, we first analyze the PDCCH processing chain in NR PTP as well as in the state-of-the-art Long Term Evolution (LTE) point-to-multipoint (PTM) solution, i.e., evolved Multimedia Broadcast Multicast Service (eMBMS). Then, via link level simulations, we compare the performance of the two technologies, observing the Bit/Block Error Rate (BER/BLER) for various scenarios. The objective is to identify the performance gap brought by physical layer changes in NR PDCCH as well as provide insightful guidelines on the control channel configuration towards NR PTM scenarios.

中文翻译：

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关于PDCCH在LTE和5G新空域中的性能

5G 新无线电 (NR) 第 15 版已于 2018 年 6 月指定。它为物理层数据传输引入了许多变化和潜在改进，尽管只考虑了点对点 (PTP) 通信。为了使用物理数据信道，例如物理下行链路共享信道 (PDSCH)，必须保证通过物理下行链路控制信道 (PDCCH) 成功传输控制信息。考虑到这两个方面，在本文中，我们首先分析了 NR PTP 以及最先进的长期演进 (LTE) 点对多点 (PTM) 解决方案中的 PDCCH 处理链，即, 演进的多媒体广播组播服务 (eMBMS)。然后，通过链路级模拟，我们比较了两种技术的性能，观察各种场景的比特/块错误率 (BER/BLER)。目标是确定 NR PDCCH 中物理层变化带来的性能差距，并为 NR PTM 场景的控制信道配置提供有见地的指南。