Abstract: Systems and methods for performing wireless transceiver self-tests in an aircraft are described. An example method includes receiving, by an in-flight entertainment (IFE) system of a current seat on the aircraft, a message comprising an indication to perform a self-test for a wireless transceiver associated with the IFE system. A configuration in the message determines a first set of seats from which the current seat receives data and a second set of seats to which the current seat transmits data. The method then performs a first test for a receiver of the wireless transceiver and a second test for a transmitter of the wireless transceiver. Upon completion of the tests, the method transmits a report including an indication of whether the receiver is operational, an indication of whether the second test was completed, and a list of successful transmitters and failed transmitters associated with the first set of seats.

Abstract: A power supply system for use in an airplane is described. The power supply system includes N alternating current (AC) power outlets configured to provide AC power output at a passenger seat in an airplane, M direct current (DC) power outlets configured to provide DC power output at the passenger seat and a controller configured to control allocation of power from a power supply to the N AC power outlets and M DC power outlet according to a phase of a plurality of phases of operation of the power supply system, where N and M are positive integers.

Abstract: Embodiments described herein relate to managing wireless connections within a spatially-dense setting like a passenger vehicle, thereby improving quality and reliability of individual wireless connections. An example method includes detecting a connection request from a passenger device requesting a wireless connection with a seatback device in a first in-vehicle location. The method includes defining a density zone that includes other in-vehicle locations surrounding the first in-vehicle location. The density zone localizes an area within which other wireless connections may be disruptive to the wireless connection. The method includes determining, via a token server that stores connection tokens that each describe an existing connection, a number of particular tokens that describe existing connections located within the density zone.