method for detecting and compensating for the lack of and / or improperly inserted cells in the asynchronous transfermethode (atm)

摘要

PCT No. PCT/EP96/02255 Sec. 371 Date Nov. 11, 1997 Sec. 102(e) Date Nov. 11, 1997 PCT Filed May 24, 1996 PCT Pub. No. WO94/39003 PCT Pub. Date Dec. 5, 1996A method for detecting and compensating for missing and/or incorrectly inserted cells on the reception side in the transmission of ATM cells with an adaptation layer AAL of type 1, the cells being assigned a sequence number and an error detection and correction code which indicates whether or not the sequence number, and additional information dependent thereon, have been transmitted correctly. It is decided on the basis of these data whether a cell is rejected or transmitted on, and whether there are missing or incorrectly inserted cells. A decision regarding the acceptance or the rejection of a received cell is taken directly without waiting for a following cell, while the possible decision as to whether a cell is preceded by one or more missing cells or whether a cell is an incorrectly inserted cell, is taken after the reception of a following cell. In the event that it is decided that the first-mentioned cell is preceded by one or more missing cells, one or more dummy cells with an equal overall number of bytes are inserted between the first-mentioned cell and the aforesaid, following cell. In the event that it is decided that the first-mentioned cell is an incorrectly inserted cell, this incorrectly inserted cell is nevertheless accepted but, for the purpose of compensation, an equal number of bytes of the aforesaid, following cell, and possibly of a cell following that, are rejected.