Abstract: A receiving device determines that a first PHY needs to be added to a first FlexE group in a working state. The receiving device performs a deskew on the first PHY or each PHY in the first FlexE group based on a received data stream corresponding to the first PHY and a received data stream corresponding to each PHY in the first FlexE group, and restores a data stream corresponding to a client from a PHY in the first FlexE group. If a skew between the data stream corresponding to the first PHY and the data stream corresponding to each PHY in the first FlexE group after the deskew is performed is zero, the receiving device restores a data stream corresponding to a client from a PHY in a second FlexE group so that flexibility of adjusting a PHY in a FlexE group in a working state is improved.

Abstract: A method includes: sending a first boundary bit block; sequentially sending an Ith bit block; determining a first parity check result and a second parity check result, where a check object of the first parity check result includes m consecutive bits of each bit block in the N bit blocks, a check object of the second parity check result includes n consecutive bits of each bit block in the N bit blocks, and at least one of m and n is greater than or equal to 2; and sending a second boundary bit block, the first parity check result, and the second parity check result.

Abstract: A data transmission method is disclosed. The method in the embodiments of the present disclosure includes: obtaining, by a sending apparatus, a code block set; determining, by the sending apparatus, whether the code block set includes an idle code block; if the code block set comprises an idle code block, generating, by the sending apparatus, a dedicated code block, where the dedicated code block includes an indication field and a data field, the data field is used to carry a service, the indication field carries indication information, and the indication information is used to indicate that the dedicated code block and indicate that the data field carries the service; replacing, by the sending apparatus, the idle code block with the dedicated code block to obtain a target code block set, and sending, by the sending apparatus, the target code block set.

Abstract: A communication method, device, and a storage medium to resolve a problem that information about a clock frequency and a clock phase of a service cannot be correctly transmitted to a receiver or correctly recovered because transparent transmission of the information about the clock frequency and the clock phase of the service cannot be implemented. Because a value of k based on a reference data unit is inserted into a second data flow, and the value of k can indicate a quantity of third data units included between a second data unit and the reference data unit in a first data flow, a receive end device can completely recover the first data flow based on the value of k.

Abstract: This application discloses example service processing methods and apparatuses. One example method includes obtaining a quantity of transmission windows corresponding to each of n services within a unit time period or in a unit data frame, wherein the unit time period or the unit data frame comprises m transmission windows, a total quantity of transmission windows corresponding to the n services is not greater than m, and both m and n are integers greater than 1. Corresponding transmission windows from the m transmission windows can then be allocated to each service based on the quantity of transmission windows corresponding to each of the n services. Based on the transmission windows corresponding to each service, service data of then services can then be multiplexed into multiplexed data transmitted in one channel. The multiplexed data can then be sent.

Abstract: A data transmission method includes: obtaining Q first code block streams, wherein Q is an integer greater than 1, the coding type is M1/N1 bit coding, and one code block in the first code block stream comprises a synchronization header area of (N1?M1) bits and a non-synchronization one code block in the second code block stream comprises a synchronization header area of (N1?M1) bits and a non-synchronization header area of M1 bits, and a non-synchronization header area of a code block in the Q first code block streams is carried in a non-synchronization header area of a code block in the second code block stream. header area of M1 bits; and placing non-synchronization header areas of code blocks in the Q first code block streams into a to-be-sent second code block stream, wherein a coding type of the second code block stream is M1/N1 bit coding.

Abstract: Embodiments of this application provide a communication method, a communications device, and a storage medium, to process an invalid block in a data stream. In embodiments of this application, N first block streams are obtained, where N is a positive integer. When there is an invalid block in the N first block streams, the invalid block in the N first block streams is converted into a target block, to obtain a to-be-sent block stream. Then, the to-be-sent block stream is sent. Because the invalid block in the block stream is checked and converted into the target block, an error that occurs in service data at a receive end and that is caused by the invalid block can be reduced.

Abstract: Embodiments of the present invention disclose a service multiplexing method. The method includes: sending, by a sending device, a bit block stream of a first service to a receiving device; if the sending device determines to switch from the first service to a second service for service sending, sending, by the sending device, at least one service switching indication bit block to the receiving device; and sending, by the sending device, a bit block stream of the second service to the receiving device. In addition, a service switching indication bit block is inserted between bit block streams that require service switching, to perform service switching, thereby reducing a latency and jitter in a service switching process, and ensuring a low latency during service switching.

Abstract: A method and an apparatus for transmitting service data are disclosed. In technical solutions of the present disclosure, when an exclusive service does not completely occupy a bandwidth resource allocated to the exclusive service, data transmission of at least two candidate services on an actually unused bandwidth is supported. In this way, a waste of bandwidth resources can be reduced and network utilization can be improved.

Abstract: This application provides a service data transmission method and a communication apparatus. The method includes: generating a multiplex sequence, where the multiplex sequence includes M data units, M is an integer greater than or equal to 2, the multiplex sequence carries N pieces of service data, and N is a positive integer less than or equal to M; and sending the multiplex sequence and first information, where the first information indicates a quantity of data units occupied by each of the N pieces of service data in the multiplex sequence.

Abstract: Embodiments of this application provide a data transmission method, a communications device, and a storage medium to reduce a quantity of cross-connections of an intermediate node in a network. In the embodiments of this application, Q first code block streams that are obtained are multiplexed into one second code block stream for transmission, a coding type of the first code block streams is M1/N1 bit coding, a coding type of the second code block stream is M2/N2 bit coding, and bits corresponding to code blocks in the Q first code block streams are carried in a payload area of a code block in the second code block stream. In other words, in the solutions provided by the embodiments of this application, the code block streams are multiplexed and demultiplexed based on a code block granularity.

Abstract: A method includes: receiving a first result obtained by performing BIP check on a sent first to-be-checked bit stream; performing BIP check on a received second to-be-checked bit stream to obtain a second result, where the second to-be-checked bit stream is a bit stream received by a receiving device after the first to-be-checked bit stream is transmitted; detecting a type of a control block in the second to-be-checked bit stream, and determining a third result based on impact of the type of the control block on a BIP check result; comparing the first result, the second result, and the third result; and if the first result is different from the second result, the first result is different from the third result, and the second result is different from a predetermined result, determining that a bit error occurs when the first to-be-checked bit stream is transmitted.

Abstract: A packet forwarding method and apparatus pertaining to the field of communications technologies are disclosed. The method includes: determining whether a current to-be-sent target packet is a header packet or a following packet in a burst sequence; when the target packet is the following packet in the burst sequence, obtaining port information of an egress port used to send the burst sequence, where the port information of the egress port is determined and stored when the header packet in the burst sequence is sent, and the burst sequence is a sequence including a plurality of packets that belong to a same service flow; and sending the target packet through the obtained egress port.

Abstract: A data transmission method, a transmitter, and a receiver, where the method includes obtaining constant bit rate (CBR) service data, performing physical coding sublayer (PCS) encoding on the CBR service data, inserting a rate adaptation code block in a PCS bitstream obtained by PCS encoding to perform rate adaptation on the PCS bitstream, mapping the adapted PCS bitstream to N timeslots of a flexible Ethernet (FlexE) frame, where N is a positive integer greater than or equal to one, and sending the FlexE frame, where FlexE overhead of the FlexE frame includes information indicating the N timeslots corresponding to the PCS bitstream. Hence, according to the data transmission method, the transmitter, and the receiver, the CBR service data may be mapped to a FlexE, and a carrying capability of the FlexE is improved.

Abstract: Embodiments of this application provide a link group configuration method and an apparatus. The link group configuration method includes: obtaining, by a first network device, candidate groups to which M physical ports of the first network device belong respectively; obtaining, by the first network device from a second network device, candidate groups to which M physical ports of the second network device belong respectively; and selecting N physical links from M physical links, as a link group between the first network device and the second network device, based on the candidate groups to which the M physical ports of the first network device belong respectively and the candidate groups to which the M physical ports of the second network device belong respectively.

Abstract: A method includes: determining a target code block in a code block stream that is in a first rate mode and includes a plurality of code blocks, where the target code block includes a code block of a start type in the first rate mode; modifying information carried in a code block type field of the target code block to target information, where the target information includes information carried in a code block type field of a code block of a start type in a second rate mode; or the target information includes information carried in a code block type field of a code block of a terminate type in a second rate mode; and transmitting a code block stream in the second rate mode to a transport network, where the code block stream in the second rate mode includes a modified target code block.

Abstract: Embodiments of the present invention provide a transmission apparatus, a connection device, and a method, where the apparatus includes N Ethernet Medium Access Control MAC ports, where each Ethernet MAC port is corresponding to a first MII interface, K Ethernet physical layer interfaces, where each Ethernet physical layer interface is corresponding to a second MII interface, and a connection device, where both N and K are positive integers; where the connection device is configured to control a time-division interconnect bus in the connection device or a time-division space-division switching matrix in the connection device to implement a connection between a timeslot of the first MII interface and a timeslot of the second MII interface, where the N Ethernet MAC ports and the K Ethernet physical layer interfaces are separately connected to the connection device by using the first MII interfaces and the second MII interfaces.

Abstract: The present disclosure relates to operation, administration and maintenance (OAM) data transmission methods and apparatus. One example method includes obtaining a first data flow of a client, inserting an OAM data block in the first data flow of the client to obtain a second data flow of the client, where the OAM data block is a 64B/66B code block that carries OAM data, and distributing the second data flow of the client to at least one slot of a channel corresponding to the client.

Abstract: A transmission rate adjustment method and a network device, the method including obtaining, by a network device, a target data stream, where the target data stream includes a first data packet, and where the first data packet includes at least two non-idle units, and inserting or deleting a padding unit between two non-idle units of the at least two non-idle units, in response to bandwidth adjustment needing to be performed, and according to a value of the bandwidth adjustment that needs to be performed, where the padding unit provides adaption to a difference between a bandwidth of an upstream transmission channel of the network device and a bandwidth of a downstream transmission channel of the network device.

Abstract: A link group configuration method includes obtaining first status information of M links between a source end device and a receive end device, where the first status information indicates a status of a differential delay between any two of the M links, obtaining first capability information of the receive end device, where the first capability information indicates a first capability of performing differential delay compensation on the M links by the receive end device, grouping N of the M links into a first link group based on the first status information and the first capability information, and sending first configuration information to a second device, where the first configuration information includes information used to indicate the first link group.