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:
Jul. 23, 2013
Filed:
Oct. 25, 2007
Hironobu Tanigawa, Kanagawa, JP;
Yasuhiro Nakamura, Kanagawa, JP;
Nobuaki Takamatsu, Kanagawa, JP;
Kyocera Corporation, Kyoto, JP;
Abstract
There are provided an OFDMA communication system capable of reducing a time necessary for a handover without releasing a wireless communication with a base station as a handover source to search base stations, a base station and a mobile station used in the communication system, and a base station switching method. In an OFDMA communication system in which data communication is performed between a plurality of base stationsand a plurality of mobile stations, each base stationincludes subchannel assignment setting unit-which sets assignment of subchannels including a first subchannel and a second subchannel for each of the mobile stations, the first subchannel including information indicating usable or unusable subchannels of the respective mobile stations and being assigned to the respective mobile stations, the second subchannel including actually-used data. When a request for switching the first subchannel is received from one of the mobile stations, the second subchannel is collected and assigned to a same slot as the first subchannel assigned to the one of the mobile stations