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:
Jun. 18, 2001
Nahoko Takano, Tokyo, JP;
Kojiro Hamabe, Tokyo, JP;
Nahoko Takano, Tokyo, JP;
Kojiro Hamabe, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
To decrease the number of base stations transmitting when a mobile station is connected to a plurality of base stations during handover and to let a base station having the best reception quality perform transmission so as to decrease interference in downlink and increase the link capacity. A mobile station periodically measures a pilot signal transmitted from a base station in a reception monitorand estimates its own movement speed at predetermined intervals based upon the reception electric field strength of the pilot signal in a speed estimate devicein soft handover state. A time length for measuring the pilot signal transmitted from the base station corresponding to the movement speed and an inner threshold value for deciding transmission base stations during handover are altered in a control section. In this case, when the movement speed is slow, the pilot signal measurement time length is set short, and the inner threshold value is set small, and when the movement speed is fast, the pilot signal measurement time length is set long, and the inner threshold value is set large.