Patent ID: 8374186

Claim:
A method for transmitting client signals, comprising: configuring a low-order Optical Channel Data Unit (ODU) set having rates increased in order; wherein the low-order ODU set comprises ODUxt (x=1, 2, . . . N); the rate of the ODUxt is a natural number multiple of the rate of the ODU1t, and the rate of the ODU1t is the rate of one timeslot unit in the high-order OPUk (k=1, 2, 3, 4); mapping a client signal to be transmitted to a low-order ODU of the low-order ODU set according to the rate of the client signal; mapping the low-order ODU to a timeslot of a high-order Optical Channel Payload Unit (OPU) in a high-order OPU set; adding overhead to the high-order OPU to form an Optical Channel Transport Unit (OTU); and transferring the OTU to an Optical Transport Network (OTN) for transmission.