What is the mesh network technical of drone link?

1. What is Mesh networking?

Mesh is a multi-node, centerless, self-organized wireless multi-hop communication network (Note: Currently, some manufacturers and application markets have introduced wired Mesh and hybrid interconnection: the concept of wired + wireless, but here we mainly discuss traditional wireless Mesh, because in many special application scenarios, wiring conditions are not available or wiring is very difficult and inconvenient), any wireless device node in the network can be used as a router to send and receive signals, and can be dynamic in any way Maintain connection and communication with other single or multiple nodes. Wireless Mesh can communicate cooperatively with other networks to solve communication problems in most areas not covered by wired networks.

2. Network form

The topology of the Mesh network is not fixed, and is completely based on the adaptive changes of the channel quality between the nodes. As shown in the following pictures, the network topology changes when four nodes are networked.

1) Chain topology

Each node is distributed in a chain, and only two adjacent nodes can communicate directly.


Nodes 2, 3, and 4 return video data to node 1, but node 4 requires nodes 3 and 2 as relays, and node 3 requires node 2 as a relay.

2) Star topology

Each node is connected to the network in a star-shaped manner. There is a central node in the network, and other nodes are directly connected to the central node.

Nodes 2, 3, and 4 directly return video data to node 1.

3) Mesh topology

Multiple nodes connect multiple types of networks, allowing the network to choose the fastest path to transmit data.

Nodes 2, 3, and 4 transmit video data back to node 1, but node 4 requires node 2 as a relay, and nodes 2 and 3 directly transmit back to node 1.

2. Analysis of characteristics of Mesh networking

1. Mesh networking characteristics

1) No equipment other than communication nodes (base station) is required

2) Composed of two or more nodes, and it is convenient to add nodes

3) Flexible networking without center

4) No or minimal configuration required

5) Support mutual communication between any nodes

6) Support multiple relays

FDZ-150  Drone Video/Data/RC Mesh Networking Transmission System

FDZ-150 is an all-in-one system that integrates video, data, and RC transmission. max transmission is 200km, interface support Ethernet; Serial； PPM/S.bus；USB, FDZ-150 use AES 128&AES256 encryption and H.264&H.265 video compression&decompression technology， have strong anti-jamming and keep data and video transmission stable.

Specifications

Frequency:1.4GHz
Bandwidth: 2.5MHz(uplink) ； 10MHz(downlink)
Power: 150km37dBm/200km 40dBm
Modulation: OFDM
Constellation:  BPSK； QPSK； 16QAM
FEC:   LDPC(1/2， 2/3， 3/4， 5/6)
Duplex:  TDD
Downlink throughput: 2.3Mbps~10Mbps(10MHz)
Uplink throughput: 115200bps
Voltage: 18V~22V
Working temperature: -20°C~50°C
Size:  143.9X122.3X38mm
Weight: 732g(air/ground)
Video Interface: Ethernet; Serial； PPM/S.bus；USB