Invention Grant
- Patent Title: Base station and mobile station for OFDMA cellular system
- Patent Title (中): 基站和移动台用于OFDMA蜂窝系统
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Application No.: US12391920Application Date: 2009-02-24
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Publication No.: US08111683B2Publication Date: 2012-02-07
- Inventor: Tomonori Yamamoto , Katsuhiko Tsunehara , Satoshi Tamaki , May Takada , Mikio Kuwahara
- Applicant: Tomonori Yamamoto , Katsuhiko Tsunehara , Satoshi Tamaki , May Takada , Mikio Kuwahara
- Applicant Address: JP Tokyo
- Assignee: Hitachi, Ltd.
- Current Assignee: Hitachi, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Brundidge & Stanger, P.C.
- Priority: JP2008-067994 20080317
- Main IPC: H04J3/06
- IPC: H04J3/06 ; H04J3/16 ; H04L1/00
Abstract:
In a cellular radio communication system, a base station or a mobile station has a TA (Time Alignment)-range-out detection function, so that when a TA-range-out state that is unable to compensate with a guard interval is detected, the transmission condition of an uplink signal at the mobile station is changed by the mobile station autonomously or by the base station and the mobile station cooperatively.
Public/Granted literature
- US20090232236A1 BASE STATION AND MOBILE STATION FOR OFDMA CELLULAR SYSTEM Public/Granted day:2009-09-17
Information query
