发明授权
- 专利标题: Wireless communication system
- 专利标题(中): 无线通信系统
-
申请号: US14411110申请日: 2013-06-20
-
公开(公告)号: US09042426B1公开(公告)日: 2015-05-26
- 发明人: Munenori Matsumoto , Akira Takaoka , Toshihiro Wakamatsu
- 申请人: DENSO CORPORATION
- 申请人地址: JP Kariya
- 专利权人: DENSO CORPORATION
- 当前专利权人: DENSO CORPORATION
- 当前专利权人地址: JP Kariya
- 代理机构: Harness, Dickey & Pierce, PLC
- 优先权: JP2012-146522 20120629
- 国际申请: PCT/JP2013/003848 WO 20130620
- 国际公布: WO2014/002443 WO 20140103
- 主分类号: H04B1/00
- IPC分类号: H04B1/00 ; H04B1/692 ; H04W72/04
摘要:
A wireless communication system includes a mobile device carried by a user and an in-vehicle apparatus equipped to a vehicle and communicatively connected with the mobile device. The in-vehicle apparatus includes a transmission unit, a transmission control unit, a reception determination unit, and a position determination unit. The transmission unit transmits low-frequency band request signals generated by spread modulating transmission data with predetermined spreading factors. The transmission control unit controls the transmission unit to generate and transmit first and second request signals having first and second attainable ranges by spread modulation using first and second spreading factors, respectively. The reception determination unit performs reception determination to response signal transmitted from the mobile device in response to the request signal. The position determination unit specifies the first attainable range or the second attainable range as a mobile device position area in response to a reception determination result.
公开/授权文献
- US20150146762A1 WIRELESS COMMUNICATION SYSTEM 公开/授权日:2015-05-28
信息查询