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.

Abstract: An embodiment of this application provides a method and apparatus for testing control software, and a computer-readable storage medium to reduce the time consumed in the simulation-based debugging and enhance efficiency. The method may include obtaining test information of a plurality of fault signals; and injecting, based on the test information of the plurality of fault signals, the plurality of fault signals into a simulation environment in sequence to obtain test results of the plurality of fault signals handled by the control software, where the simulation environment may be a simulation environment of a control object of the control software.

Abstract: Provided are a method for modifying parameters of kinematic pairs. The method includes: acquiring a first parameter modification command used for performing instruction to modify a value of a first pose of first kinematic pairs; determining a plurality of first devices in a plurality of devices according to the first parameter modification command, where, the plurality of devices are configured to have kinematic pair driver software, and the plurality of first devices are a plurality of devices including the first kinematic pairs; acquiring a second parameter modification command including a target value of the first pose of the first kinematic pairs; and invoking the kinematic pair driver software of the plurality of first devices according to the second parameter modification command so as to update the value of the first pose of the plurality of first kinematic pairs into the target value of the first pose.

Abstract: A method for creating kinematic pair objects. Kinematic pairs are included in a first facility. The first facility is equipped with control software. The method includes obtaining a first file that includes names of N kinematic pairs, calling the control software to read the names of the N kinematic pairs in the first file, and calling the control software to create N kinematic pair objects. N is an integer greater than or equal to 1. The N kinematic pair objects are determined based on the names of the N kinematic pairs read by the control software. The names of the N kinematic pairs are in one-to-one correspondence to the N kinematic pair objects.

Abstract: Embodiments of the present application provide a method and an apparatus for modifying a parameter of a kinematic pair, and a storage medium. The kinematic pair may be included in a first device, and the first device may be configured with control software. The method may include: obtaining a target value of a first parameter, where the first parameter is a motion state parameter of a kinematic pair; obtaining N first kinematic pairs, where the N first kinematic pairs have same values of the first parameter, and N is an integer greater than or equal to 1; setting modeling states of the N first kinematic pairs in the control software to an editable state; and calling the control software to modify the values of the first parameter of the N first kinematic pairs to the target value.

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.

Abstract: A status control method, applied to an optical network unit (ONU) or an optical network terminal (ONT) of a passive optical network (PON) includes: receiving a first downlink data frame, where the first downlink data frame includes data of N different rates and indication information, the indication information includes length information of data of each rate in the first downlink data frame, and N?2; determining length information of first data in the data of the N different rates, where a rate of the first data is higher than a working rate of a clock and data recovery (CDR) module; and generating control information based on the length information of the first data, to control the CDR module to be in a specified state within a period of time corresponding to the length information of the first data.

Abstract: This application discloses a communication method and a device, and belongs to the communication field. The method includes: generating a passive optical network PON data frame, where the PON data frame includes an overhead area, the overhead area includes at least a part of a first timestamp, and the first timestamp is for time synchronization; and sending the PON data frame. This application can reduce operation overheads for parsing a PON data frame. This application is for time synchronization between an OLT and an ONU.

Abstract: This application provides a method for uplink FEC encoding. On example method includes: obtaining a grant length of an uplink slot, where the grant length is equal to a product of a grant quantity of the uplink slot and a grant granularity, and the grant granularity is a grant granularity supported by a device to which the uplink slot belongs; and obtaining an FEC codeword of uplink data based on the grant length and an LDPC coding scheme, where the FEC codeword includes an LDPC codeword data bit, and in the LDPC coding scheme, N times the LDPC codeword data bit is divisible by the grant granularity, where N is a positive integer greater than or equal to 1.

Abstract: A data processing method including receiving a data flow sent by an encoder side, where the data flow is a bit stream on which interleaving encoding is used, the data flow includes synchronization information, and the synchronization information is distributed in the data flow based on a first permutation interval, obtaining, from the data flow, first data information based on a first value interval and a first value length, where the first value interval is equal to the first permutation interval, and a difference between the first value length and a length of the synchronization information is less than or equal to a preset error value, and when a similarity between the first data information and the synchronization information exceeds a preset similarity threshold, performing de-interleaving on the data flow based on a start location of the first data information.

Abstract: In an embodiment a method includes generating a raw data frame, wherein the raw data frame includes a physical synchronization block (PSB) and raw data, generating a preload pattern based on a target bit, wherein the target bit is a part of bits in a superframe counter (SFC) value corresponding to the raw data frame and scrambling the raw data based on the preload pattern to obtain target data.

Abstract: This application provides a training sequence determining method and a related device. The method in embodiments of this application includes: An ONU receives a first message sent by an OLT. Then, the ONU determines a target training sequence based on the first message, where the target training sequence is used to determine a working parameter of an equalizer in the OLT. Further, the ONU generates a first data frame including the target training sequence. In this application, the OLT may perform training based on the received target training sequence to determine the working parameter of the equalizer in the OLT.

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.

Abstract: A data processing method and a device, the method including determining, by an optical network unit, in a received data stream, after the optical network unit enters a pre-synchronization state, a position of a forward error correction (FEC) codeword boundary in the data stream based on a position of a physical synchronization sequence (Psync) field, performing an FEC codeword decoding check, where the Psync field is a field that matches a preset Psync, in the data stream, and entering, by the optical network unit, a synchronization state in response to an FEC codeword among N consecutive FEC codewords in the data stream passing the decoding check, where N is an integer greater than or equal to 1.

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.

Abstract: Embodiments of this application provide an upstream resource grant method, a device, a passive optical network, and a computer-readable storage medium. The upstream resource grant method includes: An optical line terminal obtains an upstream grant message on which transformation processing has been performed, where a transformation parameter used for the transformation processing includes a physical identity of an optical network unit (ONU); and the optical line terminal sends the upstream grant message on which the transformation processing has been performed, where the upstream grant message carries an upstream resource grant indication of the optical network unit, and the upstream resource grant indication is used to indicate an upstream resource granted to the optical network unit. The technical solutions provided in the embodiments of this application help reduce an occurrence probability of a rogue ONU phenomenon, and further improve service running stability of a PON system.

Abstract: A communication method, a device, and a system, the method including sending, by an optical line terminal (OLT) of a passive optical network that comprises the OLT and a plurality of optical network units (ONUs), a first downstream frame to the activated ONU using at least one downstream wavelength path, where the OLT and the at least one ONU of the plurality of ONUs communicate with each other using at the least one downstream wavelength path and a plurality of upstream wavelength paths, the plurality of ONUs comprises an activated ONU, wherein the first downstream frame comprises a first path identifier used to identify a first upstream wavelength path, and the first upstream wavelength path is one of the plurality of upstream wavelength paths, and receiving, by the OLT, upstream service data from the activated ONU using the first upstream wavelength path.

Abstract: A status control method, applied to an optical network unit (ONU) or an optical network terminal (ONT) of a passive optical network (PON) includes: receiving a first downlink data frame, where the first downlink data frame includes data of N different rates and indication information, the indication information includes length information of data of each rate in the first downlink data frame, and N?2; determining length information of first data in the data of the N different rates, where a rate of the first data is higher than a working rate of a clock and data recovery (CDR) module; and generating control information based on the length information of the first data, to control the CDR module to be in a specified state within a period of time corresponding to the length information of the first data.

Abstract: An apparatus includes a processor configured to determine a set of first lanes associated with a PON, select a subset of second lanes from the set, and perform lane bonding by bonding the subset to an ONU. A transmitter coupled to the processor is configured to transmit a lane bonding assignment to the ONU. An ONU includes a plurality of receivers configured to receive a first message comprising an announcement indicating an OLT lane capability. A processor coupled to the receivers is configured to process the first message and generate a second message in response to the first message, wherein the second message comprises a report indicating an ONU lane capability and prompting lane bonding in a PON. A plurality of transmitters coupled to the processor is configured to transmit the second message to the OLT.

Abstract: A passive optical network communication method, including receiving an Ethernet packet carrying an optical network unit identifier, determining a correspondence between the optical network unit identifier and an optical network unit type according to the optical network unit identifier, determining that an optical network unit that receives the Ethernet packet is a first type of optical network unit, where the optical network unit type includes the first and second type of optical network unit, and a packet receiving rate of the first type is different from that of the second type, determining a correspondence between the optical network unit type and a channel according to the first type, determining a channel corresponding to the first type, encapsulating the Ethernet packet into a gigabit-capable passive optical network encapsulation method (GEM) frame, and sending the GEM frame to the first type of optical network unit using the determined channel.