Data transmission method, related apparatus, and system
AssigneeHuawei Technologies Co., Ltd.
InventorsXuming Wu, Shengping Li, Lei Zhou, Xiaofei Zeng
Life of this patent
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Abstract
A data transmission method includes receiving, by an optical line terminal (OLT) from an optical network unit (ONU), uplink burst data that includes a synchronization data block and a payload, where the synchronization data block includes first synchronization data, wherein the first synchronization data includes a first preamble and an ONU identifier, and a first bandwidth occupied by the first frequency distribution of the first synchronization data is narrower than a second bandwidth occupied by the second frequency distribution of the payload, and obtaining, by the OLT from the first synchronization data, the ONU identifier.
Claims20
A method implemented by an optical line terminal (OLT), wherein the method comprises:
- sending a first code type and a second code type to an optical network unit (ONU);
- receiving, from the ONU, uplink burst data comprising a synchronization data block and a payload, wherein the synchronization data block comprises first synchronization data and second synchronization data, wherein the first synchronization data comprises a first preamble and a first delimiter, wherein the first preamble is of the first code type, wherein the second synchronization data comprises a second preamble and a second delimiter, and wherein the second preamble is of the second code type;
- recovering a clock based on the synchronization data block;
- obtaining an equalization parameter based on the synchronization data block;
- and
- recovering the payload using the clock and the equalization parameter.
A method implemented by an optical network unit (ONU), wherein the method comprises:
- receiving a first code type and a second code type from an optical line terminal (OLT);
- generating uplink burst data comprising a synchronization data block and a payload, wherein the synchronization data block comprises first synchronization data and second synchronization data, wherein the first synchronization data comprises a first preamble and a first delimiter, wherein the first preamble is of the first code type, wherein the second synchronization data comprises a second preamble and a second delimiter, and wherein the second preamble is of the second code type;
- and
- sending, to the OLT, the uplink burst data.
An optical line terminal (OLT) comprising:
- a transmitter configured to send, to an optical network unit (ONU), a first code type and a second code type;
- a receiver configured to receive, from the ONU, uplink burst data comprising a synchronization data block and a payload, wherein the synchronization data block comprises first synchronization data and second synchronization data, wherein the first synchronization data comprises a first preamble and a first delimiter, wherein the first preamble is of the first code type, wherein the second synchronization data comprises a second preamble and a second delimiter, and wherein the second preamble is of the second code type;
- and
- a processor coupled to the receiver and configured to:
- recover a clock based on the synchronization data block;
- obtain an equalization parameter based on the synchronization data block;
- and
- recover the payload using the clock and the equalization parameter.
An optical network unit (ONU) comprising:
- a receiver configured to receive a first code type and a second code type from an optical line terminal (OLT);
- a processor configured to generate uplink burst data comprising a synchronization data block and a payload, wherein the synchronization data block comprises first synchronization data and second synchronization data, wherein the first synchronization data comprises a first preamble and a first delimiter, wherein the first preamble is of the first code type, wherein the second synchronization data comprises a second preamble and wherein a second delimiter, and the second preamble is of the second code type;
- and
- a transmitter coupled to the processor and configured to send, to the OLT, the uplink burst data.
Dependencies are inferred from the claim text.