Station-side apparatus and PON system
AssigneeFujitsu Limited
InventorsMotoyuki Takizawa, Tetsuya Yokomoto, Koichi Seki, Takashi Ohira
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Abstract
An OLT, which is a station-side apparatus in a PON system, is connected to an ONU via an optical fiber. The OLT includes: an optical receiver which receives a burst signal from an ONU; a burst header detection unit which detects a certain delimiter pattern included in a received burst signal so as to establish synchronization of the burst signal; and a control unit which allows the burst header detection unit to perform detection of a delimiter pattern during a predicted reception period of a burst signal.
Claims4
A station-side apparatus for a PON system connected to a subscriber-side apparatus via an optical fiber, the station-side apparatus comprising:
- a receiving unit configured to receive a burst signal from the subscriber-side apparatus;
- a detection unit configured to detect a predetermined synchronization pattern included in the received burst signal so as to establish synchronization of the burst signal;
- and
- a control unit configured to allow the detection unit to perform detection of a synchronization pattern during a predicted reception period of a burst signal,
- wherein the control unit allows the detection unit to perform detection of a synchronization pattern during a discovery period for which a registration request frame from an unregistered subscriber-side apparatus is accepted, and
- wherein, in response to a receive error in which the synchronization pattern does not match a fixed pattern occurring within the discovery period, the control unit sets discovery periods subsequent to the receive error shorter than discovery periods before the receive error.
Dependencies are inferred from the claim text.