Patent 11438069 was granted and assigned to Huawei on September, 2022 by the United States Patent and Trademark Office.
This application provides data transmission methods and apparatuses. One method includes: processing, by a network device, a first optical data unit (ODU) to obtain a second ODU, wherein a bit rate of the second ODU is lower than a bit rate of the first ODU; and sending, by the network device, the second ODU.