DATA PROCESSING METHOD AND SECOND COMMUNICATION DEVICE

This application provides a data processing method and a second communication apparatus, to resolve a problem of relatively long data synchronization time in a conventional technology, and may be applied to augmented reality AR, virtual reality VR, artificial intelligence AI, cloud applications, or other fields. The data processing method includes: A second optical module receives first data from a first optical module, and determines out-of-synchronization lock based on the first data. The second optical module sends, to a second host, first indication information indicating that the second optical module is in out-of-synchronization lock state. The second optical module receives second data from the first optical module, determines synchronization lock based on the second data, and sends, to the second host, second indication information indicating that the second optical module is in synchronization lock state. The second optical module indicates synchronization statuses of the second optical module to the second host by using the first indication information and the second indication information, so that the second host can quickly start (or enter) a synchronization process without waiting for long time, to help reduce data synchronization duration.