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arXiv 1708.00366cs.NI
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RAN虚拟化对前传延迟预算的影响:实验评估

Impact of RAN Virtualization on Fronthaul Latency Budget: An Experimental Evaluation

F. Giannone, H. Gupta, D. Manicone, K. Kondepu, A. Franklin, P. Castoldi, L. Valcarenghi

摘要:

在3GPP中,已经定义了新无线电接入网络(New RAN)的架构,其中演进节点B(eNB)功能可以在分布式单元(DU)和中央单元(CU)之间划分。此外,在虚拟RAN(VRAN)方法中,这样的功能可以被虚拟化(例如,简单地说,部署在虚拟机中)。基于分离类型,向网络请求在容量和等待时间方面的不同性能(即,前传)连接DU和CU。这项研究在网络运行高级研究(ARNO)测试平台(ARNO-5G)的5G部分中,对标准开发组织(SDO)(在此特定情况下为3GPP)规定的前传延迟要求进行了实验评估。此外,它还评估了虚拟化对Option 7-1功能划分的前传延迟预算的影响程度。所获得的结果表明,在所考虑的选项7-1功能划分中,前传延迟要求约为250 us,但它们取决于无线电信道带宽和连接的UE的数量。最后,虚拟化进一步降低了延迟预算。

英文摘要:

In 3GPP the architecture of a New Radio Access Network (New RAN) has been defined where the evolved NodeB (eNB) functions can be split between a Distributed Unit (DU) and Central Unit (CU). Furthermore, in the virtual RAN (VRAN) approach, such functions can be virtualized (e.g., in simple terms, deployed in virtual machines). Based on the split type, different performance in terms of capacity and latency are requested to the network (i.e., fronthaul) connecting DU and CU. This study experimentally evaluates, in the 5G segment of the Advanced Research on NetwOrking (ARNO) testbed (ARNO-5G), the fronthaul latency requirements specified by Standard Developing Organizations (SDO) (3GPP in this specific case). Moreover it evaluates how much virtualization impacts the fronthaul latency budget for the the Option 7-1 functional split. The obtained results show that, in the considered Option 7-1 functional split, the fronthaul latency requirements are about 250us but they depend on the radio channel bandwidth and the number of the connected UEs. Finally virtualization further decreases the latency budget.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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