5G trial system coverage evaluation utilizing multi-point transmission in 15 GHz frequency band
5G trial system coverage evaluation utilizing multi-point transmission in 15 GHz frequency band
复制标题
利用15 GHz频段多点传输的5G试验系统覆盖评估
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
B. Halvarsson
中科院分区：
文献类型：
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作者：
K. Hiltunen;A. Simonsson;Peter Ökvist;B. Halvarsson
本文利用路测数据对运行在15 GHz频段的5G试验系统的下行链路覆盖率进行了评估。在测量过程中利用了波束形成、波束跟踪和多点传输等关键5G功能。结果表明，多点传输对下行链路覆盖有明显的改善。由于利用多个传输点提供的宏分集，改善了接收信号强度。此外，分布式MIMO，即用户设备(UE)同时从多个传输点接收独立数据流的可能性，导致平均秩值的大幅改善。对于发射点之间的位置尤其如此，其中UE具有到服务节点的足够好的链路。最后，由于改善了信号强度和更高的秩值，平均下行链路吞吐量提高了33-46%(整个区域)或39-42%(繁忙广场)。总而言之，测试系统能够保持非常高的下行链路吞吐量，对于在繁忙广场内移动的UE，从4到13 Gbps不等，这表明了不同波束和传输点之间无缝移动性的好处。
The downlink coverage of a 5G trial system operating within the 15 GHz frequency band is evaluated in this paper with the help of drive test measurements. Key 5G features, such as beamforming, beam tracking and multi-point transmission have been utilized during the measurements. The results indicate that multi-point transmission provides a clear improvement to the downlink coverage. Received signal strength is improved due to the macro diversity offered by the utilization of multiple transmission points. Furthermore, distributed MIMO, i.e. the possibility for the user equipment (UE) to simultaneously receive independent data streams from multiple transmission points, results in large improvements in the average rank values. This is the case in particular for the locations in between the transmission points, where the UE has sufficiently good links towards the serving nodes. Finally, as a result of both the improved signal strength and higher rank values, the average downlink throughput is improved by 33–46% (whole area) or 39–42% (busy square). All in all, the trial system is able to maintain a very high downlink throughput, varying from 4 to 13 Gbps, towards a UE moving within the busy square, which demonstrates the benefit of seamless mobility between the different beams and transmission points.