中继节点缓冲区对LTE-A系统性能影响研究

在LTE Advanced（长期演进技术升级版,简写为LTE A）中,接入中继节点的前向和后向链路之间存在着链路质量间的不匹配问题,首先分析了当缓冲区上溢或者下溢发生时,缓冲区的大小对整个系统的影响。然后基于仿真结果,得出中继节点缓冲区大小能够有效的影响服务用户的吞吐量性能,并且着重研究了具有有限缓冲区大小中继节点的LTE A辅助系统的性能。最后,阐述了对于LTE A系统中不同的中继节点,尤其是当缓冲区进入上溢或者下溢状态时,缓冲区的大小设置对系统整体性能起着至关重要的作用。

LTE advanced system performance impact assessment for its RNs buffering configuration

In presence of a link quality mismatch between the backhaul and access links of the relay node, we analyze the impact of the buffer size on the occurrence of undesirable events such as buffer overflows or underflows on the LTE Advanced system. Moreover, based on simulations, we find out that the size of the buffer at the RN can positively influence the throughput performance of the served users. Finally, we observe that in different relaying conditions, the buffer size setting plays an important role on the overall system performance, especially in terms of underflow and overflow occurrence.