This article aims to present the results from a study of the quality of service of 5G networks provided by two major 5G network providers, using a field trial approach within 60 BTS SkyTrain stations. The results obtained from the tests using 4 applications on a 5G mobile phone showed that the performance of 5G networks provided by both operators are different. When calculated for the average values, it was found both operators had the download speed of 240.3 Mbps and the upload speed of 87.3 Mbps. Besides these values, it was also found the average latency, the average jitter and the average loss from both major operators that are 19 ms, 8 ms and 0.299 % respectively. Comparing the average values derived from the results of this study with the results of another study in the Asia-Pacific region that was undertaken during the similar period of time, it was found that the Bangkok download speed is ranked in the 4th place, whereas the upload speed is ranked in the 1st place. However, it is noted that this study only covered the area of BTS SkyTrain stations. In the future, the study should be extended to cover other parts of the Bangkok metropolitan area, and other provinces. In addition, the study should be conducted by a credible organization.

翻译：本文旨在通过现场试验方法，对BTS天铁站内60个站点中两家主要5G网络运营商提供的服务质量进行研究。基于5G手机端四种应用程序的测试结果显示，两家运营商的5G网络性能存在差异。计算平均值后发现，两家运营商的下载速度均为240.3 Mbps，上传速度均为87.3 Mbps。除上述数值外，两家主要运营商的平均延迟为19 ms，平均抖动为8 ms，平均丢包率为0.299%。将本研究所得平均值与同期亚太地区另一项研究结果进行对比可知，曼谷下载速度排名第四，而上传速度排名第一。但需指出的是，本研究仅覆盖BTS天铁站区域。未来应将研究范围扩展至曼谷大都会区其他区域及外府地区，同时建议由权威机构开展相关研究。