As mentioned, the Reachi device has to function in spite of communication infrastructure in an area being destroyed. That requirement, combined with the need for ultra low power consumption, made LinkAiders turn to the Danish wireless mesh network company NeoCortec and their NeoMesh technology.
TechPeople took up the challenge to integrate NeoMesh into the Reachi device. NeoMesh is developed for IOT applications and allows for up to 65K mobile nodes. Moreover, it is able to handle dynamic topologies in real-time. As opposed to other technologies in the IoT workspace, NeoMesh allows any node in the network to dynamically change position. This feature makes NeoMesh ideal for the Reachi use case, as emergency workers equipped with a Reachi device move about and change position constantly, while the devices still can play their part in the network, receiving and transmitting data.
This flexibility is possible due to the NeoMesh Speed Routing Protocol. It replaces a central Network Manager with autonomous intelligent nodes, enabling all network nodes to link to each other automatically and dynamically, forming one single network that works, even if nodes change position or are replaced.
The NeoMesh routing protocol routes data seamlessly through the network and eliminates any concern in performance created by obstacles in the RF path, nodes being blocked or simply moving around within the network. Weak spots in a real life network can easily be fixed by just adding another node. Given it has the right network ID, it automatically becomes a part of the network.
Flexible communication infrastructure
Unlike other routing protocols the Speed Routing Protocol does not create the exact route from A to B in advance. Each NeoMesh node maintains a knowledge of which of the nearest nodes would be the best for the next hop. While data travels through the network this knowledge of the best next hop is used to decide the route of the data. The knowledge is kept up-to-date in real-time and the route is adjusted dynamically according to changes in topology and link quality.
Utilizing these network features the developers have been able to design an extremely flexible communication infrastructure. The network is divided into subsections, consisting of 1,000 Reachi device-equipped emergency workers. For this dedicated long-range deployment NeoCortec has developed a special radio module, with a line-of-sight range of >2,5 km.