Patent ID: 6310561
Filing Date: 2001-10-30
Classification: G01S,G08G

Abstract:
A transmission system for use with a mobile unit along a predetermined route comprising:a plurality of modules installed at different positions along the predetermined route, each of the plurality of modules includesi) first receiving means for receiving a first input signal containing information from a further module of said plurality of modules;ii) first transmission means for transmitting a first output signal based on said first input signal in accordance with a first radio scheme, andiii) at least one of a) second receiving means for receiving a second input signal from said mobile unit moving along said predetermined route, and b) a second transmission means for transmitting a second output signal to said mobile unit in accordance with a second radio scheme;wherein said first output signal from each of the plurality of modules contains at least a portion of the information contained in said first input signal and said first output signal is transmitted along at least a portion of said predetermined route;said mobile unit includes a transmission means and a receiving is means for communication with one of the modules located between a forward end and a rear end of said mobile unit;said mobile unit further includes an extraction means for extracting the information addressed to said mobile unit from the second output signal;the second input signal transmitted from the transmission means of said mobile unit contains the extracted information;the first transmission means of each of the plurality of said modules further transmits said first output signal based on said extracted information;each of the plurality of said modules further includes a priority information detection means for detecting predetermined priority information from at least one of the first input signal and the second input signal received by at least one of the first receiving means and the second receiving means, respectively, of said module; andthe first transmission means of said module further transmits said first output signal based on a detection result of said priority information detection means.