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:
Dec. 11, 2007
Filed:
Nov. 29, 2004
Bong-gee Song, Seongnam-si, KR;
Kwang-seop Eom, Seongnam-si, KR;
Min-hee Cho, Anyang-si, KR;
Hyeong-jong Ju, Seoul, KR;
Seung-eun Hong, Suwon-si, KR;
Bong-Gee Song, Seongnam-si, KR;
Kwang-Seop Eom, Seongnam-si, KR;
Min-Hee Cho, Anyang-si, KR;
Hyeong-Jong Ju, Seoul, KR;
Seung-Eun Hong, Suwon-si, KR;
Abstract
A mobile communication system using an orthogonal frequency division multiplexing (OFDM)/orthogonal frequency division multiple access (OFDMA) scheme. The method for assigning ranging codes in the OFDM/OFDMA communication system includes classifying rangings between a base station and a mobile subscriber station (MSS) of the OFDM/OFDMA communication system into an initial ranging, a periodic ranging, a bandwidth request ranging, and a handover ranging. A first number of ranging codes used for the rangings are created and a second number of ranging codes selected from the first number of ranging codes are assigned as handover ranging codes used for the handover ranging.