Optical communications – Diagnostic testing – Determination of communication parameter
Reexamination Certificate
2011-04-12
2011-04-12
Vanderpuye, Ken N (Department: 2613)
Optical communications
Diagnostic testing
Determination of communication parameter
C398S016000, C398S066000, C385S024000, C385S014000
Reexamination Certificate
active
07925157
ABSTRACT:
A ranging method and system for passive optical network, and an optical network unit are provided. The ranging method includes: sending an initial ranging signal to a splitter loop-back device and recording a current sending time as a first time; receiving a loop-back ranging signal from the splitter loop-back device, and determining whether the loop-back ranging signal is a return signal of the initial ranging signal; if the loop-back ranging signal is a return signal of the initial ranging signal, recording a current receiving time as a second time; and obtaining ranging information by calculating a difference between the first time and the second time, and performing a ranging on the basis of the ranging information.
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Xu Xiaogeng
Zhao Chan
Huawei Technologies Co. Ltd.
Jacob Oommen
Vanderpuye Ken N
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