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In the 5G era, due to the further increase of the frequency range, the traditional cable leakage is difficult to support the needs of 3.5GHz 5G systems, which also poses a huge challenge for 5G tunnel coverage.
China Unicom has jointly innovated with Hengxin Technology and Jingxin Communications, and proposed and verified road tunnel coverage solutions such as “New 5/4 Leaky Cable” and “New 4T4R Adherent Antenna”. The “New 5/4 Leakage Cable” solution jointly developed with Hengxin Technology adopts “equal level leakage cable”, which realizes uniform coverage of wireless signals in tunnel scenes and improves signal coverage distance to meet the coverage of 5G long tunnels. Demand; "New 4T4R Adherent Antenna" jointly developed with Jingxin Communication adopts streamlined design and wall-mounted new 5G tunnel antenna, which can realize 4-stream Massive MIMO on the basis of meeting tunnel safety installation, effectively improving coverage. And capacity capabilities. This test uses ZTE 5G network equipment, the cable is deployed in double cable, and the antenna is deployed in 4T4R. After testing, the average download rate in the road during the road tunnel has reached 206Mbps, the average upload speed can reach 43Mbps; the maximum download rate in the car is 333Mbps, and the maximum upload rate is 81Mbps. The maximum downlink rate of the sidewalk walk in the tunnel is 488 Mbps, and the maximum uplink rate is 90 Mbps. All indicators perform well.
As an important part of the highway, as of the end of 2016, there were a total of 15,181 Chinese highway tunnels, with a length of 14,039 kilometers, of which 3520 were long road tunnels of 1-3 kilometers, and 815 were long road tunnels of more than 3 kilometers. . The successful implementation and verification of the 5G coverage scheme of Yangling Highway Tunnel provided a real and reliable reference for the subsequent construction of 5G highway tunnels in China and even the whole world, which greatly promoted the implementation and industrial development of 5G networks in China, and also provided for the deployment of vehicle networks. A strong guarantee for driving inside the tunnel.