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. 07, 2012
Filed:
Aug. 23, 2007
Toshiyuki Saito, Kokubunji, JP;
Rintaro Katayama, Kokubunji, JP;
Akihiko Yoshida, Yokohama, JP;
Shiro Mazawa, Fujisawa, JP;
Toshiyuki Saito, Kokubunji, JP;
Rintaro Katayama, Kokubunji, JP;
Akihiko Yoshida, Yokohama, JP;
Shiro Mazawa, Fujisawa, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Since the OFDM communication method does not select whether plural sectors use a same terminal as a transmission destination, or always use it as a transmission destination, giving a preference to system throughput deteriorates channel quality of a terminal in a sector boundary, while increasing channel quality in sector boundaries greatly deteriorates system throughput. In a base station, when a sector transmits to a terminal in the front of a beam, only the sector performs the transmission, and when transmission is made to a terminal in a sector boundary off the direction of the beam, a different sector transmits to the same terminal using a same hopping pattern. Thereby, tradeoff between the channel quality of the terminal in a sector boundary and deterioration in system throughput can be minimized.