Abstract: An automatic door operator includes a lead screw having a first end connected to an output end of an actuating unit and a second end extending away from the output end. A lead screw nut is attached to the lead screw. A slider is attached to the lead screw nut. The slider is provided with a rack portion extending in a direction parallel to an axial direction of the lead screw, and during a movement of the lead screw nut, a length of an overlap of the rack portion and the lead screw in the axial direction varies. The operator includes a housing having a guide hole configured to be slidably engaged with the slider and an output shaft is mounted in a mounting hole disposed on the housing. The output shaft has a gear portion positioned in the guide hole and engaged with the rack portion.

Abstract: An automatic door operator and a drive mechanism thereof are disclosed. The drive mechanism of the automatic door includes a planetary reducer driven by an electric motor, and a drive shaft driven by a planetary reducer. The planetary reducer includes a housing and a planetary gear train mounted in the housing. The planetary gear train includes a final-stage planet carrier configured to output torque, and a center of the final-stage planet carrier is provided with a torque output hole. A first end of the drive shaft is detachably inserted in the torque output hole and is non-rotatably connected to the torque output hole, and a second end of the drive shaft extends out of the housing. The drive mechanism of the automatic door operator is advantageous to the miniaturization design of the automatic door operator.

Abstract: The present disclosure relates generally to systems and methods for providing sets of compatible firmware versions (e.g., cross-compatibility solution) for flashing (e.g., programming or re-programming) different devices of a network of devices (e.g., an industrial automation system) when using a flashing application. Providing the compatible firmware versions of such network of devices may facilitate flashing the devices with compatible firmware, based on a topology of the network of devices, to prevent functional errors in the network of devices. The present systems and methods may also be applicable to determining and providing cross-compatibility solution between different firmware, as well as software, used by different devices of a network of devices.

Abstract: The present disclosure relates generally to systems and methods for providing sets of compatible firmware versions (e.g., cross-compatibility solution) for flashing (e.g., programming or re-programming) different devices of a network of devices (e.g., an industrial automation system) when using a flashing application. Providing the compatible firmware versions of such network of devices may facilitate flashing the devices with compatible firmware, based on a topology of the network of devices, to prevent functional errors in the network of devices. The present systems and methods may also be applicable to determining and providing cross-compatibility solution between different firmware, as well as software, used by different devices of a network of devices.

Abstract: A clock synchronization method includes receiving, by a receiving apparatus, a plurality of data blocks using a plurality of physical layer modules (PHYs), where the plurality of data blocks include a plurality of head data blocks, performing, by the receiving apparatus, timestamp sampling on the plurality of data blocks to generate a plurality of receipt timestamps, aligning, by the receiving apparatus, the plurality of receipt timestamps using a first receipt timestamp as a reference, generating, by the receiving apparatus, a clock synchronization packet based on the plurality of data blocks, and writing, by the receiving apparatus, a value of a second receipt timestamp into the clock synchronization packet, where the second receipt timestamp is a receipt timestamp that is of a second data block and that is determined based on the plurality of aligned receipt timestamps.

Abstract: A communication method and device, and a chip system adjust, by adjusting a quantity of slot resources included in a multiframe, a bandwidth resource corresponding to one multiframe. A first communication device sends a first request message. The first request message is used to request to adjust a quantity of basic frames in a multiframe included in a first block sequence. The first communication device multiplexes, based on S1 slot resources corresponding to the adjusted multiframe in the first block sequence, Q1 first block sequences corresponding to a slot resource in the S1 slot resources, to obtain and send the first block sequence.

Abstract: This disclosure provides a method for sending and receiving a clock synchronization packet in FlexE. The method includes: generating, by a sending apparatus, indication information and a plurality of data blocks, where the plurality of data blocks are obtained by encoding a first clock synchronization packet, the indication information is used to indicate a first data block, and the first data block is a data block used for timestamp sampling in the plurality of data blocks; determining, by the sending apparatus, according to the indication information, a moment at which the first data block arrives at a medium dependent interface MDI of the sending apparatus, and generating a sending timestamp, where the sending timestamp is used to record a sending moment of the first clock synchronization packet; generating a second clock synchronization packet carrying the sending timestamp; and sending, by the sending apparatus, the second clock synchronization packet.

Abstract: A data transmission method in FlexE includes: obtaining multiple data blocks sent by L FlexE clients, where L is greater than or equal to 1; and sending a data frame including the multiple data blocks to a physical-layer device, where a transmission rate of the data frame is N*100 Gbit/s, the data frame includes T data block groups, each of the T data block groups includes M continuous data block subgroups, each of the M continuous data block subgroups includes R*N continuous data blocks, the data frame further includes T overhead block groups, a tth overhead block group includes N continuous overhead blocks. According to the method, each data block subgroup in a data frame can include R*N data blocks, and each overhead block group can include N overhead blocks, and a data transmission rate can be adjusted flexibly.

Abstract: This application provides an isolation and recovery method and related network device for a case when one or more physical layer apparatuses (PHYs) in a flexible Ethernet group (FlexE group) are faulty. In the method, if a network device determines that a first overhead block corresponding to each current available PHY is stored in a corresponding memory, the network device determines that a FlexE group meets a PHY alignment condition, and starts to simultaneously read cached data from all memories. Therefore, there is no need to insert local fault LF code blocks to all clients, and there is no need to recreate a group. This effectively reduces the impact of a faulty PHY on client services carried by a normal PHY.

Abstract: A method includes: a first network device obtains a synchronization mode indication and synchronization information, where the synchronization mode indication indicates a target network device to perform synchronization based on the synchronization information. The first network device sends the synchronization mode indication and the synchronization information through a network that supports FlexE. A second network device receives the synchronization mode indication and the synchronization information through a network that supports FlexE. The second network device performs synchronization based on the synchronization mode indication and the synchronization information.

Abstract: This application discloses a bit error indication method for a service stream and a communication apparatus, so that when a quantity of bit errors that is counted inside a device exceeds a preset threshold, it can be ensured that the device continues to work normally. The method includes: A network device receives a first signal stream from a first node by using N slots of a first bonding group, determines a first check value based on a first check code in the first signal stream, determines a second check value based on the first check value and a current check value, and sends a second signal stream to a second node by using M slots of the first bonding group. The second signal stream includes a target check value determined based on the second check value.

Abstract: This application provides a data transmission method, a communications apparatus, a network device, a communications system, a storage medium, and a computer program product, to resolve a current problem that bandwidth waste is relatively severe when a service is carried based on a FlexE technology. In this application, a frame structure of a fine-granularity service frame is newly defined, so that service data can be transmitted in a time division multiplexing mode by using an Ethernet (ETH) interface.

Abstract: A clock synchronization method includes receiving, by a receiving apparatus, a plurality of data blocks using a plurality of physical layer modules (PHYs), where the plurality of data blocks include a plurality of head data blocks, performing, by the receiving apparatus, timestamp sampling on the plurality of data blocks to generate a plurality of receipt timestamps, aligning, by the receiving apparatus, the plurality of receipt timestamps using a first receipt timestamp as a reference, generating, by the receiving apparatus, a clock synchronization packet based on the plurality of data blocks, and writing, by the receiving apparatus, a value of a second receipt timestamp into the clock synchronization packet, where the second receipt timestamp is a receipt timestamp that is of a second data block and that is determined based on the plurality of aligned receipt timestamps.

Abstract: A clock synchronization method includes receiving, by a receiving apparatus, a plurality of data blocks using a plurality of physical layer modules (PHYs), where the plurality of data blocks include a plurality of head data blocks, performing, by the receiving apparatus, timestamp sampling on the plurality of data blocks to generate a plurality of receipt timestamps, aligning, by the receiving apparatus, the plurality of receipt timestamps using a first receipt timestamp as a reference, generating, by the receiving apparatus, a clock synchronization packet based on the plurality of data blocks, and writing, by the receiving apparatus, a value of a second receipt timestamp into the clock synchronization packet, where the second receipt timestamp is a receipt timestamp that is of a second data block and that is determined based on the plurality of aligned receipt timestamps.

Abstract: The present disclosure relates generally to systems and methods for providing sets of compatible firmware versions (e.g., cross-compatibility solution) for flashing (e.g., programming or re-programming) different devices of a network of devices (e.g., an industrial automation system) when using a flashing application. Providing the compatible firmware versions of such network of devices may facilitate flashing the devices with compatible firmware, based on a topology of the network of devices, to prevent functional errors in the network of devices. The present systems and methods may also be applicable to determining and providing cross-compatibility solution between different firmware, as well as software, used by different devices of a network of devices.

Abstract: This disclosure provides a method for sending and receiving a clock synchronization packet in FlexE. The method includes: generating, by a sending apparatus, indication information and a plurality of data blocks, where the plurality of data blocks are obtained by encoding a first clock synchronization packet, the indication information is used to indicate a first data block, and the first data block is a data block used for timestamp sampling in the plurality of data blocks; determining, by the sending apparatus, according to the indication information, a moment at which the first data block arrives at a medium dependent interface MDI of the sending apparatus, and generating a sending timestamp, where the sending timestamp is used to record a sending moment of the first clock synchronization packet; generating a second clock synchronization packet carrying the sending timestamp; and sending, by the sending apparatus, the second clock synchronization packet.

Abstract: The present disclosure relates generally to systems and methods for providing sets of compatible firmware versions (e.g., cross-compatibility solution) for flashing (e.g., programming or re-programming) different devices of a network of devices (e.g., an industrial automation system) when using a flashing application. Providing the compatible firmware versions of such network of devices may facilitate flashing the devices with compatible firmware, based on a topology of the network of devices, to prevent functional errors in the network of devices. The present systems and methods may also be applicable to determining and providing cross-compatibility solution between different firmware, as well as software, used by different devices of a network of devices.

Abstract: This application provides a method for sending and receiving a clock synchronization packet in FlexE. The method includes: generating, by a sending apparatus, indication information and a plurality of data blocks, where the plurality of data blocks are obtained by encoding a first clock synchronization packet, the indication information is used to indicate a first data block, and the first data block is a data block used for timestamp sampling in the plurality of data blocks; determining, by the sending apparatus, according to the indication information, a moment at which the first data block arrives at a medium dependent interface MDI of the sending apparatus, and generating a sending timestamp, where the sending timestamp is used to record a sending moment of the first clock synchronization packet; generating a second clock synchronization packet carrying the sending timestamp; and sending, by the sending apparatus, the second clock synchronization packet.

Abstract: A data transmission method in FlexE includes: obtaining multiple data blocks sent by L FlexE clients, where L is greater than or equal to 1; and sending a data frame including the multiple data blocks to a physical-layer device, where a transmission rate of the data frame is N*100 Gbit/s, the data frame includes T data block groups, each of the T data block groups includes M continuous data block subgroups, each of the M continuous data block subgroups includes R*N continuous data blocks, the data frame further includes T overhead block groups, a tth overhead block group includes N continuous overhead blocks. According to the method, each data block subgroup in a data frame can include R*N data blocks, and each overhead block group can include N overhead blocks, and a data transmission rate can be adjusted flexibly.

Abstract: In an embodiment, the application provides a flexible Ethernet (FlexE) communication method, which includes: receiving, by a first network device by using a FlexE group, n first overhead blocks sent by a second network device, the FlexE group comprising n physical layer apparatuses (PHYs); and storing, by the first network device, the n first overhead blocks in n memories in the first time period. The method further includes simultaneously reading, by the first network device, the n first overhead blocks from the n memories, after a preset duration T starting from a moment at which a first overhead block is stored in a corresponding memory. The first overhead block is a last stored first overhead block in the n first overhead blocks, the duration T is greater than or equal to one clock cycle.