SAR DEVICE OF AAL2 TYPE ATM CELL AND SAR METHOD

摘要

PURPOSE: An SAR(Segmentation and Reassembly) device of an AAL2 type ATM cell is provided to reduce performance deterioration of a microprocessor caused when controlling an SAR function of an AAL2 type ATM cell, thereby being applicable to any place using a different AAL2 type ATM cell. CONSTITUTION: The first inner memory(103) stores a perfect short cell payload. The first CAM(Content Addressable Memory)(102) stores a mapping table, searches a stored position of the first inner memory(103), which corresponds to identification information of an inputted short cell, and supplies the searched position. The second inner memory(105) stores an imperfect short cell payload. The second CAM(104) records stored position information of the second inner memory(105) corresponding to identification information of an imperfect short cell. A short cell separator(106) receives an AAL2 type ATM cell to separate into a short cell, and perceives whether the separated short cell is perfect. If so, the separator(106) stores the payload of the short cell in the first inner memory(103). If the short cell is imperfect, the position of the short cell is recorded in the second CAM(104). The separator(106) informs a CPU(200) of the short cell to be outputted. A transmission interface(108) outputs the short cell.