In this letter, we have studied how to use simultaneous collision-free duplexing (SCD) in point-to-multipoint environment. SCD is a method exchanging uplink and downlink signals simultaneously using the same resource for each link and has the advantages in that it does not need complicated self-interference cancellation unlike full duplexing. In addition, SCD is different from dynamic time division duplexing (D-TDD) in which interlink interference can be completely avoided. Therefore, to analyze the effect of interlink interference on SCD, we have derived the upper bound of link capacity and the required value of interlink isolation level for better SCD performance than D-TDD. We have verified the analyzed isolation level and confirmed that SCD has good performance even in practical point-to-multipoint environment through simulation.

中文翻译：

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点对多点环境中同时无碰撞双工方法的性能分析


在这封信中，我们研究了如何在点对多点环境中使用同时无冲突双工（SCD）。 SCD是一种针对每个链路使用相同资源同时交换上行链路和下行链路信号的方法，并且具有与全双工不同的不需要复杂的自干扰消除的优点。此外，SCD不同于动态时分双工(D-TDD)，动态时分双工可以完全避免链路间干扰。因此，为了分析链路间干扰对SCD的影响，我们推导了链路容量的上限以及SCD性能优于D-TDD所需的链路间隔离级别值。我们验证了分析的隔离级别，并通过仿真确认SCD即使在实际的点对多点环境中也具有良好的性能。