1.8GHz&2.1GHz双频RRU在4/5G协同建设中的应用  

Application of 1.8 GHz & 2.1 GHz Dual Band RRU in 4/5G Collaborative Construction

作　　者：张宏亮 ZHANG Hongliang(Anhui Telecom Planning and Design Co.,Ltd.,Hefei 230031,China)

机构地区：[1]安徽电信规划设计有限责任公司,安徽合肥230031

出　　处：《通信电源技术》2023年第12期112-115,共4页Telecom Power Technology

摘　　要：经过电联双方多年的深度共建共享,当前5G已基本完成3.5 GHz频段在城区、县城等高业务流量场景的连续覆盖。3.5 GHz相比于2.1 GHz具有频段高、波长短的特点,因此传播损耗更大,覆盖范围更小,对于乡镇、农村等范围较广的场景,若再采用3.5 GHz频段进行覆盖,则需比2.1 GHz多出2~3倍的站址才能满足网络覆盖指标。因此,对于乡镇、农村等广域覆盖场景,电联可采用2.1 GHz进行5G网络覆盖,1.8 GHz用于4G网络覆盖,且这2个频段设备可共用一副天线,1.8 GHz&2.1 GHz双频设备应运而生。通过对该双频设备的覆盖效果进行测试验证,并与单独建设进行造价对比,进而总结出该双频设备在网络建设中的建设方案及应用场景,为电联双方广域场景覆盖提供建设指导。After years of deep co construction and sharing by both parties of China Telecom,5G has basically completed continuous coverage of the 3.5 GHz frequency band in high business traffic scenarios such as urban and county areas.Compared to 2.1 GHz,3.5 GHz has the characteristics of high frequency band and short wavelength,resulting in greater propagation loss and smaller coverage.For scenarios with a wider range such as towns and rural areas,if the 3.5 GHz frequency band is used for coverage,it will have 2~3 times more station locations than 2.1 GHz to meet the network coverage indicators.Therefore,for wide area coverage scenarios such as towns and rural areas,the power grid can use 2.1 GHz for 5G network coverage,1.8 GHz is used for 4G network coverage,and these two frequency band devices can share a pair of antennas,resulting in the emergence of dual frequency devices at 1.8 GHz and 2.1 GHz.By testing and verifying the coverage effect of the dual frequency equipment,and comparing its cost with that of a separate construction,the construction plan and application scenarios of the dual frequency equipment in network construction are summarized,providing guidance for the construction of wide area scene coverage for both the power grid and the power grid.

关 键 词：双频射频拉远单元(RRU) 5G 无线网 系统建设 

分 类 号：TN929.5[电子电信—通信与信息系统]