Efficient Dynamic Spectrum Sharing for LTE-NR Networks
Efficient Dynamic Spectrum Sharing for LTE-NR Networks
复制标题
LTE-NR 网络的高效动态频谱共享
DOI：
10.1109/cecit53797.2021.00101
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
S. Xiong
中科院分区：
文献类型：
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作者：
Jincan Xin;Sen Xu;Hua Zhang;S. Xiong
为了满足5G对数据速率和容量的要求，提出了动态频谱共享（DSS）以提高频谱效率。然而，在4G和5G用户之间动态共享频谱将导致显著的干扰。特别是，来自LTE小区的小区参考信号引起的小区间干扰严重降低了5G系统性能。为了减少干扰，提出了诸如RE级速率匹配、RB级速率匹配和控制信道避免的机制。然而，这些方法引入了额外的频谱开销。为了进一步提高5G系统性能，引入了一些增强机制，例如多个小区特定参考信号（CRS）模式、类型B增强和跨载波调度。具体地说，本文介绍了决策支持系统的机制，并分析了这些机制的成本。最后给出了2.1G 40M部分DSS的测试结果，并对40M部分DSS在不同场景下的性能进行了比较。最后，对决策支持系统的部署提出了一些建议。
To cater to the 5G requirements for the data rate and capacity, dynamic spectrum sharing (DSS) is proposed to improve spectrum efficiency. However, sharing the spectrum between the 4G and 5G users dynamically will result in significant interference. Especially, the inter-cell interference caused by cell reference signals from LTE cells reduces the 5G system performance severely. To reduce the interference, mechanisms such as RE-level rate matching, RB-level rate matching, and control channel avoidance are proposed. However, these methods introduce additional spectrum overhead. To further improve the 5G system performance, some enhanced mechanisms such as multiple cell-specific reference signals (CRS) patterns, Type B enhancements, and cross-carrier scheduling are introduced. Specifically, the paper introduces the mechanisms of DSS, and analyses the cost of these mechanisms. In addition, the paper illustrates the test results of 2.1G 40M partial DSS and compares the performance of 40M partial DSS in different scenarios. Finally, we give some suggestions for the DSS deployment.