Service Transmission Method And First Transmission Device

A first transmission device, wherein the first transmission device comprises

• at least one processor;
• and
• a non-transitory computer-readable storage medium coupled to the at least one processor and storing programming instructions for execution by the at least one processor, wherein the programming instructions instruct the at least one processor to perform operations comprising:
• mapping n client signals with a rate of t to ms/t load subareas of m lanes of flexible optical transport network (FlexO) frames, wherein each client signal is mapped to one load subarea, a payload area of each of the m lanes of FlexO frames is divided into s/t load subareas, and each lane of FlexO frame is transmitted by using a FlexO lane with a transmission rate of s, wherein s, t, m, and s/t are all positive integers;
• configuring FlexO type information, timeslot overhead information, and signal mapping information for each lane of FlexO frame, wherein:
• the FlexO type information indicates a FlexO group interface type, and the FlexO group interface type indicates the transmission rate of the FlexO lane for transmitting each lane of FlexO frame and indicates that the payload area of each lane of FlexO frame is divided into the s/t load subareas;
• the timeslot overhead information indicates client signals mapped to the s/t load subareas of each lane of FlexO frame;
• and
• the signal mapping information indicates distribution, in each load subarea, of a client signal carried in each of the s/t load subareas of each lane of FlexO frame;
• and
• transmitting the m lanes of FlexO frames to a second transmission device by using m FlexO lanes with the transmission rate of s.