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. 22, 2009
Filed:
Mar. 04, 2005
Jae-hyok Lee, Seoul, KR;
Jae-ho Jeon, Seongnam-si, KR;
Soon-young Yoon, Seoul, KR;
Seung-joo Maeng, Seongnam-si, KR;
Jeong-tae OH, Yongin-si, KR;
Ji-ho Jang, Seoul, KR;
Jae-Hyok Lee, Seoul, KR;
Jae-Ho Jeon, Seongnam-si, KR;
Soon-Young Yoon, Seoul, KR;
Seung-Joo Maeng, Seongnam-si, KR;
Jeong-Tae Oh, Yongin-si, KR;
Ji-Ho Jang, Seoul, KR;
Samsung Electronics Co., Ltd, , KR;
Abstract
A method for allocating a frequency to a subscriber station (SS) in handover operation in an Orthogonal Frequency Division Multiple Access (OFDMA) system. In the method, the SS checks safety channel frequencies for a target base station (BS), generates a safety channel frequency request message for requesting allocation of the checked safety channel frequencies, and transmits the safety channel frequency request message. Upon receiving the safety channel frequency request message from the SS, a serving BS allocates frequencies for a requested channel, and transmits an allocation message with the frequency allocation information to the SS. The serving BS transmits a channel allocation request message to the target BS according to the frequency allocation information. Upon receiving the channel allocation request message, the target BS allocates the safety channel frequencies to the SS.