Method and apparatus applied to PON system, system, and storage medium
AssigneeHuawei Technologies Co., Ltd.
InventorsWei Wang, Feng Xia, Gang Zheng
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Abstract
In accordance with an embodiment, a method includes determining, by a standby optical line terminal (OLT), that a primary OLT has stopped sending a downlink optical signal over a first management channel; sending, by the standby OLT, a ranging request to a first optical network unit (ONU), over a second management channel, where the first ONU is one of the at least one ONU, and the second management channel is a channel between the standby OLT and the at least one ONU; and obtaining, by the standby OLT, a distance parameter between the first ONU and the standby OLT based on a ranging response received from the first ONU over the second management channel.
Claims21
A method applied to a passive optical network (PON) system comprising a primary optical line terminal (OLT), a standby OLT, and at least one optical network unit (ONU), wherein the primary OLT is configured to perform window open ranging on the at least one ONU over a first management channel, and is configured to perform service data transmission with any ONU over a first service channel, the method comprising:
- determining, by the standby OLT, that the primary OLT has stopped sending a downlink optical signal over the first management channel;
- sending, by the standby OLT, a ranging request to a first ONU over a second management channel, wherein the first ONU is one of the at least one ONU, and the second management channel is a channel between the standby OLT and the at least one ONU;
- and
- obtaining, by the standby OLT, a distance parameter between the first ONU and the standby OLT based on a ranging response received from the first ONU over the second management channel, wherein determining, by the standby OLT, that the primary OLT has stopped sending the downlink optical signal over the first management channel comprises:
- receiving, by the standby OLT, a ranging notification sent by the primary OLT, wherein the ranging notification indicates that the standby OLT is to perform ranging,
- detecting, by the standby OLT, an uplink optical signal received over the second management channel, and
- in response to a strength of the detected uplink optical signal being lower than a first threshold, determining that the primary OLT has stopped sending the downlink optical signal over the first management channel.
An apparatus applied to a passive optical network (PON) system, wherein a first PON system comprises a primary optical line terminal (OLT), the apparatus, and at least one optical network unit (ONU), the primary OLT is configured to perform window open ranging on the at least one ONU over a first management channel, and the primary OLT is configured to perform service data transmission with any ONU over a first service channel, the apparatus comprising:
- a processor configured to determine that the primary OLT has stopped sending a downlink optical signal over the first management channel;
- and
- a transceiver configured to send a ranging request to a first ONU over a second management channel, wherein the first ONU is one of the at least one ONU, and the second management channel is a channel between the apparatus and the at least one ONU, wherein
- the processor is further configured to:
- obtain a distance parameter between the first ONU and the apparatus based on a ranging response that is received by the transceiver over the second management channel and that is from the first ONU,
- measure an optical signal corresponding to the ranging response, and
- determine a signal quality corresponding to the first ONU.
A passive optical network (PON) system comprising:
- a primary optical line terminal (OLT), a standby OLT, and at least one optical network unit (ONU), the primary OLT performs window open ranging on the at least one ONU over a first management channel, and the primary OLT performs service data transmission with any ONU over a first service channel, wherein:
- the primary OLT is configured to:
- perform window open ranging on the at least one ONU over the first management channel,
- perform service data transmission with any ONU over the first service channel
- in response to stopping sending a downlink management signal over the first management channel, send a ranging notification to the standby OLT, wherein the ranging notification indicates that the standby OLT is to perform ranging;
- and
- the standby OLT is configured to:
- determine that the primary OLT has stopped sending a downlink optical signal over the first management channel,
- send a ranging request to a first ONU over a second management channel, wherein the first ONU is one of the at least one ONU, and the second management channel is a channel between the standby OLT and the at least one ONU, and
- obtain a distance parameter between the first ONU and the standby OLT based on a ranging response received from the first ONU over the second management channel.
Dependencies are inferred from the claim text.