Method and apparatus for time synchronization in a communication system

摘要: A method and apparatus for time synchronization in a communications system such as including cable modems is provided. The comprises the steps of receiving first timestamp from headend unit with modem, generating modem reference response to receipt timestamp. then receives second generates difference comprising timestamps generated references. clock error that well correction factor time. local synchronized master through adjusting output factor. one instance an offset value representative amount per pulse. This added accumulator on each pulse, adjusted when rolls over. signal can be utilized determine slot which transmit upstream without colliding signals other system.