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:
Jun. 02, 2015
Filed:
Aug. 20, 2010
Jun Woo Jung, Suwon-si, KR;
Jae Sung Lim, Suwon-si, KR;
Jun woo Jung, Suwon-si, KR;
Jae sung Lim, Suwon-si, KR;
AJOU UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION, Suwon-Si, Gyeonggi-Do, KR;
Abstract
An OFDM-based multiple access method and a communication device controlling the same are provided. The OFDM-based multiple access method includes transmitting a predetermined synchronization control signal to many and unspecified terminals, and receiving a test message from the terminals in response to the synchronization control signal; classifying the terminals that receive the test message in a first unit time from a predetermined reference time after the transmission of the synchronization control signal into a first group, and classifying the terminals that receive the test message in a certain n-th unit time from the reference time into an n-th group; allocating use permission time of sub-channels to the groups; and the terminals transmitting/receiving data through partial occupation of the sub-channels and symbols at a time allocated to the corresponding groups.