A service processing method and apparatus and a device is disclosed. Synchronization headers of four 66b code blocks are removed, and a 1-bit code block type indication is added as control information of service data, to be encoded as a 257b code block. This avoids a bandwidth waste caused by the synchronization headers, and improves bandwidth utilization. When a 257b code block stream is mapped to an OSUflex frame, the code block type indication is mapped to an overhead area of the OSUflex frame, the four 66b code blocks from which the synchronization headers are removed are mapped to a payload area of the OSUflex frame, and check information obtained by checking the control information is mapped to the overhead area of the OSUflex frame, so that bit error protection is performed on the control information.

This application provides a service processing method and apparatus. The method includes: A transmitting device generates a plurality of transmission frames, where an i.sup.th frame in the plurality of transmission frames carries first information, the first information is used to indicate an amount of data of a service that is carried in each of t transmission frames, the t transmission frames include an (i−t).sup.th frame to an (i−1).sup.th frame in the plurality of transmission frames, i−t>0, and t≥1; and sends the plurality of transmission frames to a receiving device. A transmission frame carries information about an amount of data of the service that is carried in a transmission frame before the transmission frame.

Embodiments of the present invention disclose a bandwidth adjustment method and a related device, configured to adjust a bandwidth of a first payload subarea included in a transmission frame flexibly. The method of embodiments of this application includes the following steps: First, determine the first payload subarea and a second payload subarea from a payload area of the transmission frame; second, determine that a bandwidth of at least one service does not match a bandwidth of the first payload subarea; finally, adjust the bandwidth of the first payload subarea, where an adjusted bandwidth of the first payload subarea matches the bandwidth of the at least one service.

Embodiments of this application provide a signal frame processing method and a related device. A sink node performs delay compensation on a received service, so that delay variation generated in a transmission process of the service can be effectively eliminated. The method in embodiments of this application includes the following steps. First, the sink node receives a signal frame. A payload area of the signal frame is used to bear a target service, and an overhead area of the signal frame includes a node quantity field. Then, the sink node determines, based on the node quantity field, a quantity of nodes through which the target service passes during transmission. Further, the sink node performs delay compensation on the target service based on the quantity of nodes.

Embodiments of the present invention provide a method and an apparatus for transmitting and receiving a client signal in an optical transport network. In the transmission method, a received client signal is mapped into a variable-rate container OTU-N, wherein a rate of the OTU-N is N times as high as a preset reference rate; and then, the variable-rate container OTU-N is split into N optical stab-channel transport units OTUsubs by column, where a rate of each OTUsub equals to the reference rate; next, the N optical sub-channel transport units OTUsubs are modulated onto one or more optical carriers; at last, the one or more optical carriers is transmitted through a fiber.

A technique is provided for transmitting client data included in a client signal via an optical transmission path of an optical transport network. The optical transport network uses transport frames include a transport frame period for transmitting client data. The method includes receiving multiple client entities comprising multiple client data bits; determining the number of client data entities received during a transport frame period to establish a mean number of client data entities to be included in a transport frame, the mean number of client data entities corresponding to a mean number of client data bits; mapping multiple client data entities into the transport frame wherein mapping comprises alternately adding and subtracting an amount of client data bits to/from the mean number of client data bits for at least two consecutive transport frames; and transmitting the transport frames comprising the client data via the optical transport network.

Provided are a method and apparatus for sending and receiving a multiframe, a communication device, and a communication network system. The method includes: determining a multiframe identifier used for identifying a multiframe number according to a number of timeslots of a physical layer, where the multiframe number is the number of frames constituting one multiframe; and sending the multiframe to a receiving end, where the multiframe carries the multiframe identifier. Further provided is a computer storage medium.

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.

The present disclosure discloses example method and apparatus for switching a line bandwidth of an optical transport network. One example method includes a network device switching an optical transport network (OTN) frame from a first bandwidth to a second bandwidth at a granularity of a substructure to generate a first OTN frame with the second bandwidth, where a bandwidth of the substructure is a specified value, and a difference between the first bandwidth and the second bandwidth is a multiple of the specified value. The first OTN frame with the second bandwidth is encapsulated as an encapsulated frame with the second bandwidth according to a first encapsulation protocol. The encapsulated frame with the second bandwidth is transmitted at an optical layer.

A method for processing service data in an optical transport network includes receiving service data, where the service data is to be mapped to a plurality of consecutive data frames, determining a quantity of code blocks, occupied by the service data, of each of the plurality of consecutive data frames and locations of the code blocks, where the code block includes a payload area and an overhead area, the payload area of the code block is used to carry the service data, and the overhead area of the code block includes identification information of the service data, and mapping the service data to the plurality of consecutive data frames based on the quantity of code blocks and the locations of the code blocks.