A single transmitter transmits K communication bursts in a shared spectrum in a time slot of a time division duplex communication system. % based on the weight of the concentrate. The outer lens structure comprises an outer positive lens, a second transparent substrate and an outer negative lens. The architecture provides for the total integration of vehicle systems and functions, and permits plug-and-play device integration and upgradeability. A set of command primitives are used for communicating information between the one or more IO controllers and the adapters via the physical interface.