发明授权
- 专利标题: Transmission method, transmitter-receiver, and transmitting-receiving system
- 专利标题(中): 传输方式,发射机和发射接收系统
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申请号: US10971047申请日: 2004-10-25
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公开(公告)号: US07580634B2公开(公告)日: 2009-08-25
- 发明人: Takeshi Takeuchi , Akio Tajima , Shigekazu Harada , Akihiro Tanaka , Wakako Maeda
- 申请人: Takeshi Takeuchi , Akio Tajima , Shigekazu Harada , Akihiro Tanaka , Wakako Maeda
- 申请人地址: JP Tokyo
- 专利权人: NEC Corporation
- 当前专利权人: NEC Corporation
- 当前专利权人地址: JP Tokyo
- 代理机构: Sughrue Mion, PLLC
- 优先权: JP2003-367880 20031028
- 主分类号: H04B10/08
- IPC分类号: H04B10/08
摘要:
A transmitter-receiver having a means for automatically determining the status of transmission medium such as optical fiber, and a means for automatically setting and resetting the transmission rate and/or output power according to the status of the transmission medium, a transmission loss and gain measurement method, and a transmitting-receiving system. A transmitter-receiver comprises at least: an output power controller for controlling the output power of a transmitter; an input power measuring section for measuring the strength of input signals; and an information processor for deriving the loss or gain of a path to change the output power of the transmitter and/or the rate of data transmission according to the derived loss or gain of the path. A transmission loss and gain measurement method applied to a system comprising transmission media and a plurality of the transmitter-receivers connected via the transmission media, comprises the steps of: transmitting information on the output power of a first transmitter-receiver from the first transmitter-receiver to a second transmitter-receiver; measuring reception strength by the second transmitter-receiver when the second transmitter-receiver receives the output power information; reading the output power information by the second transmitter-receiver; and comparing the reception strength with the output power information to calculate a transmission loss or gain by the second transmitter-receiver.