An apparatus for subsea environment sensing. In one aspect, the apparatus may include a repeater assembly, disposed in an optical repeater; and an environmental sensor assembly, disposed proximate to the repeater assembly, the environmental sensor assembly being coupled to receive power from the repeater assembly over an optical link.

A communication method and a communication apparatus are provided. The method includes: An optical line terminal (OLT) may obtain a cycle period and a data amount of periodic data, and allocate a first slot and a second slot based on the data amount of the periodic data and the cycle period, where the first slot is used to transmit the periodic data, the second slot is used for windowing, and the second slot is a part or all of slots other than the first slot in the cycle period. The OLT uniformly allocates the first slot used to transmit the periodic data and the second slot used for windowing.

A communication method and a communication apparatus are provided. The method includes: An optical line terminal (OLT) may obtain a cycle period and a data amount of periodic data, and allocate a first slot and a second slot based on the data amount of the periodic data and the cycle period, where the first slot is used to transmit the periodic data, the second slot is used for windowing, and the second slot is a part or all of slots other than the first slot in the cycle period. The OLT uniformly allocates the first slot used to transmit the periodic data and the second slot used for windowing.

This application relates to clock synchronization methods optical head ends, and optical terminals. In an example method, the optical head end receives a first packet from a controller. The first packet includes service data to be transmitted to a plurality of slave stations. The optical head end generates a second packet based on the first packet. The second packet includes the service data and time information. The time information indicates an execution time point at which the plurality of slave stations perform an operation based on the service data. The optical head end further sends the second packet to the plurality of optical terminals to request the plurality of optical terminals to control the plurality of slave stations to perform the operation at the execution time point based on the service data.

This application relates to clock synchronization methods optical head ends, and optical terminals. In an example method, the optical head end receives a first packet from a controller. The first packet includes service data to be transmitted to a plurality of slave stations. The optical head end generates a second packet based on the first packet. The second packet includes the service data and time information. The time information indicates an execution time point at which the plurality of slave stations perform an operation based on the service data. The optical head end further sends the second packet to the plurality of optical terminals to request the plurality of optical terminals to control the plurality of slave stations to perform the operation at the execution time point based on the service data.

A communication method and apparatus, and an optical bus network are provided. This application relates to the field of industrial data communication technologies. In the method, a controller sends, when discovering a target optical head end, a target optical head end identifier to the target optical head end, where the target optical head end identifier is for identifying the target optical head end; the controller determines a target management protocol from management protocols supported by the target optical head end; and the controller communicates target information with the target optical head end based on the target optical head end identifier and the target management protocol, where the target information is used by the controller to manage the target optical head end and/or at least one optical terminal managed by the target optical head end.

A communication method and apparatus, and an optical bus network are provided. This application relates to the field of industrial data communication technologies. In the method, a controller sends, when discovering a target optical head end, a target optical head end identifier to the target optical head end, where the target optical head end identifier is for identifying the target optical head end; the controller determines a target management protocol from management protocols supported by the target optical head end; and the controller communicates target information with the target optical head end based on the target optical head end identifier and the target management protocol, where the target information is used by the controller to manage the target optical head end and/or at least one optical terminal managed by the target optical head end.

In a method, an optical head end first determines a first correspondence, where the first correspondence indicates a correspondence between a slave station device identifier and a slave station node identifier. Then the optical head end receives a first message from an optical terminal, where the first message includes device information, the device information includes a first device identifier, and the first device identifier indicates a first slave station connected to the optical terminal. Then, the optical head end determines, from the first correspondence, a first node identifier corresponding to the first device identifier. Further, the optical head end sends the first node identifier to the optical terminal.

In a method, an optical head end first determines a first correspondence, where the first correspondence indicates a correspondence between a slave station device identifier and a slave station node identifier. Then the optical head end receives a first message from an optical terminal, where the first message includes device information, the device information includes a first device identifier, and the first device identifier indicates a first slave station connected to the optical terminal. Then, the optical head end determines, from the first correspondence, a first node identifier corresponding to the first device identifier. Further, the optical head end sends the first node identifier to the optical terminal.

Extending a communication distance range of an electronic data interface involves establishing a data communicating link between a first and second electronic device in accordance which communicate in accordance with a predetermined electronic interface standard (PEIS). An optical fiber bus extender embedment (FBEE) disposed intermediate of the first and second electronic device includes first and second transport modules, respectively disposed proximate to the first and second electronic devices. These transport modules interface the FBEE directly with both of the first and second electronic device in accordance with the PEIS. Electronic data signals received from the first electronic device are used to modulate a first optical signal so as to form a first modulated optical data signal (MODS). The first MODS is coupled to an optical fiber to communicate the first MODS to the second transport module.