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:
Nov. 04, 2014
Filed:
Mar. 05, 2013
Megachips Corporation, Osaka, JP;
Handa Chen, Osaka, JP;
MegaChips Corporation, Osaka-shi, JP;
Abstract
A communication system includes a first communication device and a second communication device that performs power line communication with the first communication device via an electric power line, wherein the first communication device transmits a plurality of times an initial packet signal added with an error detection code in each of reference timing at regular intervals in the vicinity of zero crossing timing. The second communication device determines whether a reception state is good or poor based on a result of the error detection on each of the received initial packet signals, and when the reception state is poor, the second communication device transmits an ACK signal in timing shifted by micro time from the reference timing after receiving the initial packet signal. Then, the first communication device transmits a data packet signal in timing at the regular interval after the timing of receiving the ACK signal.