NEWS CENTER

When selecting a self-organizing network (SON) base station equipment, you may consider the following factors:

►High-power transmission capability: Choose equipment with high-power output to ensure signal stability and strength during long-distance transmission.
►Anti-interference capability: Look for equipment with strong anti-interference capabilities to effectively handle wireless signal interference in maritime environments and ensure stable and reliable transmission.
►Self-organizing network (SON) function: SON technology can establish dynamic network connections between devices, offering greater flexibility and robustness. This will help adapt to the complex and variable maritime environment.
►Bandwidth requirements: Ensure the selected equipment provides sufficient transmission bandwidth, at least 8 Mbps or higher, to meet the demands of video transmission.

System Architecture Design

►Based on the comprehensive considerations above, we have decided to adopt a  shipborne self-organizing network (SON) + ground base station  solution to meet the project requirements. The selected equipment features 4W high-power transmission, utilizing an omnidirectional antenna for the 1.4GHz band and a directional antenna for the 2.4GHz WiFi band, which significantly enhances transmission capability. Furthermore, selecting the 1.4GHz wireless frequency band** can mitigate signal interference caused by the complex and variable maritime environment.

►To achieve real-time monitoring and dispatch, we will deploy ground base station equipment and a base station on the lookout tower on the shore. Correspondingly, the unmanned surface vehicle (USV) and the command center will be equipped with shipborne base stations and base stations. This configuration establishes a mesh network connecting the lookout tower with the USV, and the lookout tower with the command center. Consequently, the USV can transmit surveillance video data back to the command center via the lookout tower.

►For network configuration, we can choose between an infrastructure-less intelligent mesh mode or a point-to-point and point-to-multipoint base station-client mode. Additionally, a fiber optic cable can be deployed between the lookout tower and the command center, enabling data transmission via a public network, This multi-link approach ensures data transmission stability, establishing reliable connections between the command center and the USV.

►Two channels of surveillance video from the USV will be transmitted back to the shore-based command center. This allows the command center to remotely control the USV in real time, gain situational awareness through the dual-camera feeds, and conduct **immediate dispatch and management.

Project Background and Requirements

The ratio of personnel between the offshore operations platform and mobile operation vessels is approximately 2:1. The distance from the offshore platform to the vessels is about 30 km. The command center-to-mobile vessel height ratio is approximately 3:1.

Based on our technical assessment, it has been decided to deploy long-range wireless equipment and MESH self-organizing network base station equipment. A fixed backbone link will be established using 1.4 GHz base stations to ensure stable transmission between the platforms themselves. For communication between the platforms and the mobile operation vessels, MESH self-organizing network devices will be utilized to enable transmission in a mobile state. This setup will wirelessly connect the offshore platform with the mobile operation vessels, ensuring that crew members on the vessels can maintain real-time information exchange with external parties.

System Overview
This system consists of three main components:

1. The signal transmission end on the offshore operations platform.

2. The wireless self-organizing network communication link.

3. The signal reception and coverage system on the mobile operation vessels.

The operation vessels will be equipped with wireless self-organizing network base stations and terminal signal coverage equipment. This configuration will provide a stable, real-time communication link for the construction platform and ensure signal coverage for terminal devices.

Network Design
The design involves several operation vessels performing construction work within an approximate 6 km radius of the offshore platform. The distance between individual platforms is 10 km.

The height of the offshore platform above sea level versus the potential installation height on the operation vessels maintains the 3:1 ratio. According to Earth curvature calculations, this height differential essentially satisfies the line-of-sight condition for signal transmission between the two points.

Application Scenarios: Unmanned Surface Vessels (USVs) and Manned Ships

Solution Advantages

• Seamless Handover Based on Core Principles
  Supports hierarchical grouping and roaming network formation, thereby expanding the system's communication capacity.

• Flexible, Infrastructure-Independent Deployment for Each Link
  The system operates without a central network hub, enabling flexible deployment as needed. It requires no supporting infrastructure such as data centers or dedicated transmission networks and can be configured arbitrarily. Coverage can be further extended through multi-hop relay networks.

• Multi-Link Data Diversity and Fault Tolerance
  Incorporates frequency hopping functionality to effectively enhance anti-interference and anti-tracking capabilities. Digital filtering is implemented to efficiently suppress remote interference. Concurrently, the use of an ARQ (Automatic Repeat Request) transmission mechanism reduces data packet loss and improves overall data transmission reliability.

• Robust Anti-Multipath Capability
  Utilizes COFDM (Coded Orthogonal Frequency Division Multiplexing) technology, offering strong resistance to multipath interference. The system supports transparent transmission of various service data types without requiring differential coding. Through its broadband transmission capability, it can support clear voice, broadband data, high-definition video, and other multimedia services.