Abstract:
A method for generating a de-mapping clock for service data is provided, comprising: receiving a data frame and obtaining a payload value from the data frame; obtaining distribution of valid service data in a certain time cycle according to the payload value in the data frame; generating a data writing clock according to the distribution of the valid service data, performing a homogenization treatment on the data writing clock, and obtaining the data writing virtual clock; comparing a non-gap statistical quantity of the data writing virtual clock with a non-gap statistical quantity of the service clock gap, and generating a de-mapping clock gap according to the comparison result; generating a service clock gap according to the de-mapping clock gap; and performing a phase-locked loop process on the de-mapping clock gap, so as to obtain a recovery clock signal required by a de-mapping process.
Abstract:
This application discloses a dynamic time adjustment method, apparatus, and system, and pertains to the field of network communications. The method includes: determining a length of a new downstream transmission duration; updating lengths of upstream and downstream transmission durations based on the determined length of the new downstream transmission duration; and keeping silent or sending an idle symbol or another symbol with known content in a transition zone until all user-side devices complete updating of the lengths of the upstream and downstream transmission durations, where the transition zone is an additional zone of the new downstream transmission duration compared with a currently used downstream transmission duration, or an additional zone of a new upstream transmission duration compared with a currently used upstream transmission duration.