Global Maritime Highest 5G base station
About Equivalent to more than 90 stories high
The deep and middle channel is a world-class cross-sea cluster project that integrates "bridges, islands, tunnels and underwater interconnections". It is a link between Guangdong since It is an important transportation link connecting the two major functional groups of the Pearl River Delta, "Shenzhen-Dongguanhui" and "Pearl Central River". Among them, the Lingdingyang Bridge has a main span of 1,666 meters, making it the world's largest offshore steel box girder suspension bridge.
Flying over the Lingdingyang Channel, the highest point of the catwalk on the bridge is about 270 meters from the sea, which is approximately equivalent to the height of more than 90 stories. The lowest point is 105 meters from the sea. It is the highest catwalk in Shanghai in the world. The catwalk is laid in a U-shaped arc. The entire length of a single catwalk is about 3,000 meters, and the bottom is composed of hollow steel mesh. On the catwalk, the builders will complete a series of processes such as traction of bridge cable strands, tightening cable clamps, installation of slings, of main cables, and subsequent hoisting of steel box beams, which can be called "high-altitude scaffolding." To achieve full 5G network coverage from the sea to the top of the tower and conduct a global live broadcast of the catwalk challenge is an extremely glorious and challenging task.
16 kilometers! How to build a digital "passage" in the high-altitude "sky chasm"? The longest distance between the east and west bridge towers of the Lingdingyang Bridge and the land base station is 16 kilometers. To provide a stable data transmission channel to ensure uninterrupted 5G base stations and uninterrupted live broadcasts, wired optical cables are basically not feasible. After repeated surveys and rigorous demonstrations, technicians proposed a solution using microwave transmission and built a 5G base station on the top of the east and west main towers to ensure the transmission rate and delay required for live broadcast. During the construction process of
, due to the strong reflection interference from the sea surface and the impact of large-scale ferries at sea, the 5G base station frequently interrupted and the network was basically unable to be used normally. To this end, the technical team continued to explore and improve, and finally decided to innovatively use two microwave transmission channels at the same time to form an aggregate link, and use Huawei microwave multi-antenna space diversity technology for 1+1 protection. Practice has proven that this solution can not only effectively resist fading caused by long-distance sea surface propagation, but also increase channel protection, making the transmission link more reliable.
3 days! "Seize the day" is what the global audience demands of China Unicom people. On June 12, 13 days before the official event, China Unicom Zhongshan Branch received a network support task; in a race against time, technicians braved heavy rain to go out to survey the next day and determined the microwave transmission plan. Microwave equipment that can meet long-distance transmission requirements on the sea is not common and requires customized production. With the full support of Huawei , the equipment arrival date is locked on June 22. At this time, there are only 3 days of installation and commissioning time before the official start of the event!
In order to install the huge microwave antenna with a diameter of 1.2 meters, construction workers went to an altitude of more than 200 meters for debugging and testing. At a distance of 16 kilometers, an angular error of 0.1° may cause signal deviations of up to tens of meters. The construction is extremely difficult and the work intensity is extremely high. Finally, with the unremitting efforts of the technical team, the equipment was successfully installed on the 23rd; on the 24th, the trial broadcast of Global Network was successful; in the early morning of the 25th, the long-distance microwave debugging was successful, and the site initially had the network conditions for global online live broadcast.
30 degrees! In the face of high temperatures and frequent thunderstorms, should we "look at the ocean and sigh" or "man can conquer nature"? In mid-June, the weather was extremely unstable, with the highest temperature reaching 30 degrees for several days, and frequent thunderstorms. The two 270-meter-high main towers were very vulnerable to lightning attacks. There is only one ship to and from the bridge tower every day, and the operation time is short, which makes equipment transportation and construction more difficult.In order to ensure the timely completion of the base station construction, the construction workers closely monitor the weather conditions every day. When the construction period is tight, they even live directly at sea. Once the operating conditions are met, they will immediately go to the tower to work. As long as there is no heavy rain, the construction workers will sweat profusely on the tower and finally complete the base station construction task as scheduled.
Zero network interruption, zero lag
Lingdingyang central area achieves high-speed 5G network coverage
"The world's highest 5G base station in the sea" was successfully built. The on-site 5G network Speedtest speed test downlink rate is as high as 750Mbps, and the uplink rate is 240Mbps. In the center of the vast Lingdingyang City The district has achieved high-speed 5G network coverage! At this point, the network communication guarantee work is all ready and waiting for actual combat testing!
html On June 25, the live broadcast on-site support team of China Unicom Zhongshan Branch was stationed on the island one day in advance. The background monitoring team monitored the status of the 5G base station and the stability of the microwave circuit in real time 24 hours a day. The land-side support team was stationed at key base stations in the early morning of the 26th and equipped with two powered support vehicles to achieve uninterrupted network monitoring and support. During the event, the overall network operation was stable, and the live broadcast was uploaded and watched smoothly. html On June 26, the "World's Highest Catwalk in the Sea" Extreme Challenge officially kicked off. Well-known Internet experts and bloggers from all over the country came to the world's highest catwalk in the sea to check in through slow live broadcast + boat sailing " New Landmark of the Greater Bay Area", and launched four challenges on the 270-meter-high sea catwalk: "Bridge" you can, high-altitude "work", poetry competition, and chasing waves alone. The on-site low-latency, zero-lag 5G network experience allowed global audiences to appreciate the charm of the highest catwalk in the world's oceans. It also fully demonstrated China Unicom's 5G hard power and reflected the new achievements of China Unicom's national new infrastructure national team. Take responsibility!
"Strengthen the foundation of the network and solidify the foundation of services." China Unicom will continue to fulfill its responsibilities as a central enterprise this time, focus on building high-quality networks, enhance network differentiation capabilities, implement network security, and better fulfill the "national team, main force, The mission of "vanguard" is to contribute more to the development of digital economy society!
