Systems and methods for interoperability positive train control
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United States of America Patent
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Dec 25, 2012
Grant Date -
Mar 31, 2011
app pub date -
Sep 23, 2010
filing date -
Sep 25, 2009
priority date (Note) -
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Abstract
A method for implementing communications in a railroad communications system having a base station radio and remote radios, the remote radios including a mobile radio and a wayside radio. The method includes assigning a common radio communications channel for allowing a remote radio to connect with the base station radio using a carrier sense multiple access (CSMA) communications protocol and assigning a local channel for allowing communications between the radio base station and the remote radios and between the remote radios, wherein communications on the local channel utilizes a selected one of fixed time division multiple access (FTDMA) and dynamic time division multiple access (DTDMA) communications protocols.
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