摘要:
A system, method and device for communicating information from a wayside device to a vehicle are provided. In one embodiment, the device comprises. a first light unit configured to emit a first pattern of light in a non-visible spectrum; a second light unit configured to emit a second pattern of light in the non-visible spectrum; wherein said first pattern is distinct from said second pattern; an interface in communication with the first and second light units and configured to receive information of an operational mode of the wayside device; wherein the first and second light units are responsive to one or more first control signals from said interface to operate in a first mode, corresponding to a first operational mode of the wayside device, in which said first pattern of light is on and said second pattern of light is off; and wherein the first and second light units are responsive to one or more second control signals from said interface to operate in a second mode, corresponding to a second operational mode of the wayside device, in which said first pattern of light is off and said second pattern of light is on.
摘要:
A communication method includes the steps of, at a first system, communicating with a second system for the establishment of a mutual clock and, at the first system, performing a first set of operations based on the mutual clock and performing a different, second set of operations based on a first clock of the first system, wherein the first clock is different from the mutual clock.