Patent ID: 6606324
Filing Date: 2003-08-12
Classification: H04J,H04L,H04Q

Abstract:
A method for the clock recovery in transport in constant bit rate (CBR) channels, for implementation of the adaptation layer of the asynchronous transfer made (AAL), comprising the steps of: temporarily storing data at receiving end; using a clock frequency, with which data are polled out from said storing means, and calculating a series of time differences (zk), characterised in that it further comprises the steps: of sending said difference series to a control block where the instant value (zk) of said differences is multiplied by the value of its own index (k); of subsequently comparing the obtained result to the sum (sum) of the previous values (zk) considered up to the moment (up to kâˆ’th value); of checking that the absolute value of the difference outcoming from said comparison is less than the error (err) multiplied by the index (kâˆ’1) of the previous value (zk) and by the absolute sum value (sum); and of calculating the control value (ei) of the clock correction by dividing the sum value (sum) by index (k) and by multiplying the same by gain.