As part of this, the FAA wants to phase in what is known as free flight giving pilots more information about the position of other aircraft and allowing them to make more of the crucial traffic decisions.
Six of the 11 finalists (out of 89 original entrants) finished the course.Unlike pilotless aircraft such as the Predator (used in Afghanistan), which are flown remotely by aircrew on the ground, driverless vehicles in DARPA's competition had to make all handling and traffic decisions themselves.
Channel congestion leads to packet loss, delay and unreliability issues, and has a serious impact on vehicular traffic, including road accidents, road jams, and wrong traffic decisions.
Although their study was able to extract the inherent characteristics of multiple attributes involved in making air traffic decisions during a specific scenario of congestion, it failed to generalize the case of congestion.
Since both delay and reliability depend on the traffic pattern and traffic-forwarding decisions are made based on delay and reliability, this creates a feedback loop that may generate a great variability in the traffic dynamics, and therefore a demand for fast recalculation of the estimates.
In fact, in this manner, they would be able to acquire full knowledge about the current network status as well as about the forthcoming traffic generated by applications, thus allowing to take proper traffic management decisions.
They would make no fancy routing or traffic-management decisions; they would just "deliver the bits".Unlike the telephone circuits of the day, which used their built-in smarts to determine where messages were to be delivered, the data would tell the network where they wanted to go.
In-tunnel air quality requirements and emission limits at discharge points are modeled as nonlinear constraints for traffic control decisions.
One important research question is how to develop algorithms that leverage SDN abstractions to make traffic engineering decisions and ultimately better utilize the network resources?
However, the former is in charge of taking final traffic engineering decisions, while the latter are in charge of collecting information, sending them to the OLT SDN controller, and receive/apply decisions of the former.
