Diagnosing and resolving wireless network malfunctions

摘要

A preconditioned air unit (10) for supplying preconditioned air to an aircraft parked on the ground, the preconditioned air unit comprising a main unit with a housing (12) accommodating a flow duct (20) with an air inlet (22) for ambient air and an air outlet (25) for connection to the parked aircraft, a blower (30) connected with the flow duct for generation of an air flow from the air inlet toward the air outlet, and a plurality of compartments (34), each of which is configured for accommodation of a self-contained cooling module comprising at least one refrigeration system, each of which includes at least one compressor (38), at least one condenser (40), at least one expansion valve (42), and at least one evaporator (44) connected in a flow circuit containing a refrigerant, and wherein each compartment is further configured so that the at least one evaporator interacts with the air flow in the flow duct when the self-contained cooling module is installed in the compartment, and wherein at least one self-contained cooling module is installed in the plurality of compartments.

主权项

1. A method for diagnosing an error encountered in response to an attempt to newly add a first wireless device to a wireless communication network having a plurality of components selected from wireless devices, access points, and routers, the method comprising acts of:
providing a diagnostic tool on one of the plurality of components of the wireless communication network; embedding into a communication protocol a description of the error encountered in response to the attempt to newly add the first wireless device to the wireless communication network; transmitting the embedded description over the wireless communication network using the communication protocol; the diagnostic tool receiving and analyzing the description of the error embedded into the communication protocol and determining a cause of the error and an associated solution, wherein the communication protocol is in compliance with IEEE 802.11 and the description is embedded in a Probe Request Management Frame and is transmitted over the wireless communication network.