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:
Apr. 14, 2015
Filed:
Mar. 08, 2012
Applicants:
Sun-shin an, Seoul, KR;
Sea Young Ahn, Gyeonggi-do, KR;
Inventors:
Sun-Shin An, Seoul, KR;
Sea Young Ahn, Gyeonggi-do, KR;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04W 52/02 (2009.01); H04W 28/04 (2009.01); H04W 84/18 (2009.01); H04W 4/00 (2009.01);
U.S. Cl.
CPC ...
H04W 28/044 (2013.01); H04W 52/0225 (2013.01); H04W 28/04 (2013.01); H04W 52/0216 (2013.01); H04W 52/0219 (2013.01); H04W 84/18 (2013.01); H04W 4/006 (2013.01);
Abstract
Disclosed is a method and apparatus for collision avoidance in a sensor network. The method includes transmitting data by a transmitter; comparing, by the transmitter, a remaining time between the data transmission and a backoff period with a turnaround time taken for the transmitter to switch from a transmit (Tx) mode to a receive (Rx) mode; selectively transmitting, by the transmitter, a busy signal indicating that a channel is in use, according to the comparison result; and receiving, by the transmitter, an acknowledgement (ACK) signal from a receiver after the turnaround time has elapsed.