We have upgraded avionics and mission systems of several types of aircrafts such as fixed wing aircraft, Helicopters to achieve the best performance and cost-effective solution.
The experienced methods are federated avionics integration by using point to point design (ARINC-429, RS-422 …) or using DATA-Busses such as MIL-STD-1553 and High Speed Modular Avionics by using ARINC-664.