A method for interleaving and demultiplexing of sdh frame and corresponding device.

摘要

In particular, the invention concerns a method of interlacing and deinterleaving of pointers of the sdh frames of type stm - 1 and stm - n transmitted between a transmitter and receiver. Each frame comprises three areas: - a section overhead; - a pointer area; - a payload area comprising, in particular, the useful data to transmit. The process of the invention is characterized in that, at the level of the transmitter, the interleaving consists in the interlacing of the bits of the pointer area and those of the payload area according to a law of interlacing preserving their rank interleaved with the bits modulo 24, the interleaving providing an interleaved frame transmitted to the receiver and in that it consists, at the level of the receiver to deinterleave the interleaved frame according to a law reciprocal of the law of interweaving. this way thus, all the bits of the pointers in the frame while preserving the values of the parity control bytes b1 and b2.