发明名称 |
Transmission method, transmitter-receiver, and transmitting-receiving system |
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.
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申请公布号 |
US7580634(B2) |
申请公布日期 |
2009.08.25 |
申请号 |
US20040971047 |
申请日期 |
2004.10.25 |
申请人 |
NEC CORPORATION |
发明人 |
TAKEUCHI TAKESHI;TAJIMA AKIO;HARADA SHIGEKAZU;TANAKA AKIHIRO;MAEDA WAKAKO |
分类号 |
H04B10/08;H04B10/00;H04B10/04;H04B10/06;H04B10/14;H04B17/00 |
主分类号 |
H04B10/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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