Patent ID: 7830924
Filing Date: 2010-11-09
Classification: H04J

Abstract:
1. Transmitting equipment for receiving a first client signal, speed converting the first client signal to generate a second client signal, and transmitting a high-order transmission frame including the second client signal, the transmitting equipment comprising: a clock data recovery (CDR) part for extracting a clock signal from the first client signal; a frequency divider for frequency dividing the extracted clock signal, wherein the frequency divider divides the extracted clock signal to a frequency within a frequency range suitable for a counting operation by a received data number count part that counts the number of data pieces of the first client signal received within a unit time; a transmitted data number selection part for selecting and outputting a value representing the number of data pieces of the second client signal transmitted to the high-order transmission frame within the unit time; an integration counter for integrating a difference between outputs of the received data number count part and of the transmitted data number selection part for each unit time; a stuff determination part for making stuff determination when the output of the integration counter exceeds a threshold, wherein the stuff determination part performs stuffing insertion so that the output of the integration counter approaches zero on a time average basis; a first multiplier for multiplying the output of the received data number count part by a first coefficient; and a second multiplier for multiplying the output of the transmitted data number selection part by a second coefficient, wherein the integration counter integrates a difference between outputs of the first multiplier and the second multiplier for each unit time.