China Unicom has introduced its first oceanic private network of the 'shore-sea-vessel-satellite' type in Guangdong province. This system integrates nearly 1,500 ultra-long-range coastal base stations equipped with offshore wind turbines, vessel cells, and satellite backup.
The launch of this network aligns with a national program to establish a six-network infrastructure that connects communication, power supply, computing, logistics, and associated networks. The core issue addressed by this development is the rationale for continuously adding marine base stations despite the expansion of internet access via low-Earth orbit satellites in the same waters.
Close to the coast, terrestrial radio communication remains preferable due to lower cost and higher bandwidth. The coastal level provides continuous coverage up to about 22 kilometers from the shore, supporting communication for over 100,000 fishing vessels in Guangdong, where traffic generated by daily activities would exceed a budget calculated solely for satellite access.
Further out at sea, base stations installed on booster stations and wind farm towers form a marine chain spanning approximately 40 to 80 kilometers. These stations serve aquaculture and energy operations where fiber optics and traditional towers are unavailable.
Vessel nodes form a mobile layer: the 3+10+N scheme utilizes large rescue ships and patrol boats as emergency cells. Each such vessel restores local coverage within a radius of about 10 kilometers around itself. When operating together, the combination of vessels, coastal links, and the satellite backbone allows the entire relay chain to provide service over a distance exceeding 200 kilometers from the shore.
This figure of 200 kilometers represents the overall operational range of the system, not the radius of a single cell. A rescue ship creates a temporary communication hub at the scene, allowing standard phones to re-establish connection, after which video and command traffic are transmitted back home via high-gain antennas and space communication channels. Satellite communication is viewed as a backup option for deep-sea areas, rather than the primary channel for intensive near-shore traffic.
The hybrid logic involves using high-performance terrestrial and marine stations where traffic is high and transport is economical, switching to space channels only where towers or fiber optics are absent. High and low orbital level connections with intelligent 5G data transmission are still under testing.
The same assets demonstrate the principle of connecting six networks. For instance, a wind turbine can power both the power grid and the communication network; a maintenance vessel on a logistics route can carry a communication cell; and telemetry from distant seas ultimately feeds into the computing infrastructure.
Planned additions include spectrum sensors, weather analysis, and underwater detection, bringing the network closer to the convergence of communications and perception, although it does not confirm the completion of 6G deployment.
Commercial viability will depend on more than just rescue drills. Operators require stable paid use cases in wind energy, fishing, insurance, and smart shipping, as well as reliability in salty fog conditions as more Class N vessels join. For the aerospace and telecommunications industries, the Guangdong network serves more as a reminder of the complementary nature of marine cellular networks and low-orbit constellations within a unified coverage budget, rather than a statement about the obsolescence of satellites.