Cell interleaving method in ATM switching system

An asynchronous transfer mode (ATM) switching system, comprising:

• a first buffer for storing a header field of an ATM cell;
• a first data converter to convert data outputted from the first buffer into a first format;
• a second data converter to convert nth bits of n bit segments of an information field of the ATM cell into a second format;
• a second buffer to store bits outputted from the second converter, and output the stored bits in the second format;
• and
• an output controller for sequentially coupling the bits of the header field stored in the first buffer with 1st to (n−1)th bits in the every n bits of the information field to thereby output the coupled result, outputting only nth bits which have not been outputted in a data unit, and outputting bits which correspond to the information field and have not been outputted.

A method of interleaving data, comprising the steps of:

• a) identifying a first group in the data having 40 bits;
• b) identifying a second group in the data having 384 bits;
• c) identifying a third group of data from the bits of the second group of data, the third group comprising 40 segments of 8 bits each;
• d) sequentially combining 1st through 7th bits of each of the segments of the third group with individual bits of the first group to form 8 bit interleaved segments;
• and
• e) outputting the interleaved segments and all remaining bits.

A method of interleaving (x+y) bits of data, comprising the steps of:

• a) identifying and storing a first group of data having x bits;
• b) identifying a second group of data having y bits;
• c) identifying a third group of data from the bits of the second group of data having x segments of n bits each;
• d) sequentially combining every 1st through (n−1)th bit of each of the segments of the third group with individual bits of the first group, and outputting the sequentially combined groups;
• e) storing an nth bit of each of the segments of the third group in a second buffer;
• f) outputting the remaining bits of the second group;
• and
• g) outputting the bits from the second buffer.