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This system adopts a new type of sub-broadband “wireless networking” based on point-to-point, point-to-multi-point, AD-Hoc, and centerless mesh networking. EST-MESH, as a mobile center or a non-centralized organization network, is a wireless broadband system with a central point, distributed, multi-hop relay, dynamic routing, strong survivability, and good scalability. It uses its own routing protocol internally, through wireless Multi-hop transmission completes wireless communication between nodes. A self-organizing distributed broadband wireless network transmission system with efficient MAC layer transmission protocol and two-layer routing protocol. It has excellent sub-broadband performance, strong system technology anti-interference ability, high spectrum efficiency, long transmission distance, anti-fading ability, strong diffraction ability, etc. It can realize real-time, high-quality wireless two-way data transmission in a complex, non-line-of-sight environment.
Facing the information communication transmission of drones, robots, and unmanned boat platforms in complex environments, we follow the design principles of generalization, modularization, and standardization to achieve high-speed real-time transmission of telemetry, remote control, and load data from the ground control station to the unmanned terminals on the water. As well as the information collaboration and interaction function between unmanned terminals, the system works continuously for a long time, stably and reliably.
1.1 No complicated system configuration is required after the central station is turned on. After the site is turned on and powered on, the network is automatically connected, and the communication can be started.
1.2 Arbitrary topology, multi-hop relay, relay and forwarding.
1.3 The logical attributes of each node can be flexibly configured.
1.4 At present, the same-frequency center networking can support the interconnection of 60 nodes, with a maximum of 120 nodes for access, and the self-organizing network supports the interconnection of 40 nodes.
1.5 The channel uses AES encryption.
1.6 The peak value of system data bandwidth is ≥90Mbps.
1.7 The central network supports spectrum sensing, and the terminal self-adaptive frequency hopping.
1.8 Supports high-precision radio ranging, distance location monitoring between nodes (not dependent on GPS and Beidou).
1.9 The system real-time platform monitors wireless spectrum, noise floor, signal-to-noise ratio, field strength, bandwidth, node distance, etc.
1.10 Low power consumption, wide voltage input, small size.
|Software Architecture||center-less, distributed wireless self-organizing network based on the IP system.|
|Anti-multi-path Interference||TDD-OFDM multi-carrier modulation has strong resistance to multi-path interference.|
|Diffraction Ability||with strong diffraction and penetrating power.|
|Dynamic Routing||layer 2 intelligent routing protocol.|
|Flexibility||strong scalability, nodes can dynamically join and exit.|
|Mobility||maximum moving speed of the tested node: ≥160 km/h.|
|Self-healing||the damage of individual terminals will not affect the normal operation of the network, and it has a strong ability to resist damage.|
|Operating Mode||star network, chain network, point-to-point, point-to-multi-point, and multi-point-to-multi-point.|
|IP transparent Transmission||support network port, serial port, IP transparent transmission, interconnection and intercommunication.|
|Internet Expansion||effectively extend the Internet coverage, any terminal in the network can be used as a gateway, and each node of the network can access the Internet through the gateway node.|
|Map Display||under the condition of external GPS/BD, support map location display.|
|Configuration Management||can set the radio channel, bandwidth, power, speed, IP, key and other parameters.|
|Status Display||can dynamically display network topology, link quality, signal strength, environmental noise, etc.|
Marine Unmanned Ship Wireless Broadband Ad Hoc Network Base Station
Model No.: EST-WRC01-MESH
Communication Frequency: 1415~1455MHz, 1MHz step adjustable;
Transmitting Power: 2*37dBm; 1dBm step adjustable;
Bandwidth Mode: 5/10/20 MHz;
Modulation Method: multi-carrier TDD-COFDM;
Carrier Modulation: BPSK/QPSK/16QAM/64QAM (adaptive or fixed);
Receiving Sensitivity: -98dBm @ 10MHz;
70km (ground-air/air-air line-of-sight), 20km (ground-ground line-of-sight);
Communication Rate: peak 90Mbps (adaptive
Transmission Delay: about 2ms per hop;
Multi-hop Capability: video can reach 8 hops;
Start-up Time: ≤25S;
Network Access Time: less than 1 second;
Route Switching: less than 1 second;
Data Interface: network port x 2, RS232 x 2;
Wifi Supports 2.4G or 5.8G (without wifi on the airborne terminal)
Battery Power Supply: 24V/4A; battery capacity 12000mAh;
Ground End: power consumption of the whole machine: 15~45W,
Protection Level: IP65;
Working Temperature: -40~+70℃;
Size: Length: 360mm*width 250mm*height 190mm;
COFDM mobile video wireless ad hoc network transmission technology is used to solve this problem. This wireless transmission technology uses orthogonal frequency division multiplexing technology to transmit high-definition video images with a relatively narrow air bandwidth. The data transmission bandwidth can reach up to 100M. The high-definition video resolution can reach 1080P. The MESH self-organizing network system has the characteristics of light weight, high stability, strong anti-interference ability, and long transmission distance. It can be easily combined with various industry equipment and reduce the load of integrated equipment. Disaster rescue, maritime law enforcement inspections, surveillance of infectious diseases, surveying and mapping, news reports, power inspections, disaster relief, TV shooting and broadcasting, etc., have greatly improved the overall performance of UAVs/unmanned ships. The mesh device generally works in the 1.4GHz frequency band. Due to the low operating frequency, it has strong diffraction and can carry out stable data transmission in a relatively complex environment, and it can also be stabilized during high-speed motion. The data transmission is very suitable for image transmission applications in complex environments. The self-organizing airborne mesh broadband radio can be deployed in land vehicles, ships or buildings. It is simple to install and highly flexible. The self-healing nodes that can be formed by each node can be deployed quickly and support mobility. Airborne radio/car radio’s wireless remote image monitoring, mobile video, image data and voice two-way mobile communication solution can also be applied to railway, public security, fire, and military data transmission control systems, such as drones and unmanned vehicles , Unmanned ship’s remote command and measurement and control and image transmission and other different application solutions.
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