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.

A method for adjusting a transmission rate includes obtaining first data at a first rate; and sending the second data at a second rate, where the second data comprises the first data and a specific proportion of additional data, the second rate is greater than the first rate.

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.

An embodiment of this application provides a data transmission method. The method includes: A first communication apparatus sends an i.sup.th AM group to a second communication apparatus, and sends first data of a plurality of service flows to the second communication apparatus based on a mapping relationship. The first data is carried in M time units between the i.sup.th AM group and an (i+1).sup.th AM group, the mapping relationship is a mapping relationship between a slot of a first calendar and the plurality of service flows, and the first calendar includes s slots. The M time units between the i.sup.th AM group and the (i+1).sup.th AM group include N first counting periods, each time unit of the first counting period corresponds to one slot of the first calendar, and different time units of a same first counting period correspond to different slots of the first calendar.

Time transfer systems and methods implemented in a first node steps of communicating a stream of encoded blocks with a second node; and communicating synchronization messages with the second node via a synchronization message channel in overhead associated with the stream of encoded blocks, wherein the synchronization messages are utilized for synchronization of a clock at the second node. Each block in the stream of encoded blocks can be one of a data block and an overhead block.

According to an aspect of an embodiment, operations may include receiving a first Ethernet signal having a first data rate less than a second data rate, the second data rate being a ZR data rate. The operations may also include dividing the first Ethernet signal into a plurality of first-signal sub-signals that each have a third data rate that is less than the first data rate. Moreover, the operations may include generating a second Ethernet signal having the second data rate, the generating of the second Ethernet signal being based on the plurality of first-signal sub-signals such that the second Ethernet signal includes the plurality of first-signal sub-signals. Further, the operations may include providing the second Ethernet signal to a ZR network such that the second Ethernet signal is a ZR signal.

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.

A service data processing method and apparatus is disclosed. A data frame is divided into code blocks with smaller granularity, and service data is mapped to a corresponding quantity of code blocks in the data frame based on a service requirement. In addition, the data frame is used to indicate a location of a code block carrying the service data. In one manner, a code block in a payload area of the data frame is divided into a data code block and an overhead code block, and the overhead code block is used to indicate a location of a data code block carrying the service data. In the another manner, an indication field is configured in an overhead area of the data frame to indicate a location of a code block that carries the service data and that is in the payload area of the data frame.

Methods and apparatus are provided for transmitting data. In one aspect, a method of transmitting data comprises identifying a start of a Common Public Radio Interface (CPRI) frame, identifying CPRI data blocks of the CPRI frame, and transmitting the CPRI data blocks of the CPRI frame in slots of a FlexE calendar of a Flex Ethernet physical layer group (FlexE PHY group).

A method and a network device for establishing FlexE path includes a first forwarding node receiving a first path establishment request message sent by a first source node, where the first path establishment request message is used to establish a first FlexE path between the first source node and a first destination node, and the first FlexE path is used to transmit a first service flow; the first forwarding node establishing a second FlexE path between the first forwarding node and a second forwarding node based on the first path establishment request message, and deleting an established third FlexE path between the first forwarding node and the second forwarding node after the second FlexE path is established; and the first forwarding node establishing and storing a correspondence between the first FlexE path and the second FlexE path.