The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 27, 2013
Filed:
Jul. 20, 2012
Applicants:
Byung Sik Yoon, Daejeon-si, KR;
Sook-jin Lee, Daejeon-si, KR;
Inventors:
Byung Sik Yoon, Daejeon-si, KR;
Sook-Jin Lee, Daejeon-si, KR;
Assignee:
Electronics and Telecommunications Research Institute, Daejeon-si, KR;
Primary Examiner:
Int. Cl.
CPC ...
H04M 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A frequency control apparatus and method for railway wireless communication are provided. The frequency control apparatus includes a variable frequency processor and a fixed frequency processor. The variable frequency processor selects an available variable frequency and wirelessly receives non-safety-related train running information from a base station at the selected variable frequency. The fixed frequency processor wirelessly receives safety-related train running information at a predetermined fixed frequency.