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:
Mar. 11, 2014
Filed:
Dec. 27, 2007
Yoshiaki Ofuji, Yokohama, JP;
Kenichi Higuchi, Yokohama, JP;
Mamoru Sawahashi, Yokohama, JP;
NTT DoCoMo, Inc., Tokyo, JP;
Abstract
A disclosed base station is used in a radio communication system where sounding reference signals from user terminals are multiplexed using distributed FDMA in which distributed frequency blocks each including frequency subcarriers discretely distributed in a system bandwidth are allocated to the user terminals, and the system bandwidth is repeatedly halved into frequency band segments according to a binary-tree structure. The base station includes a transmission bandwidth determining unit for determining transmission bandwidths to be allocated to the respective user terminals for transmission of the sounding reference signals based on path losses between the user terminals and the base station; a transmission frequency determining unit for allocating the frequency band segments corresponding to the determined transmission bandwidths as transmission frequency bands for the sounding reference signals; and a transmission method reporting unit for reporting the transmission bandwidths and the transmission frequency bands to the respective user terminals.