| 摘要 |
PURPOSE: A method and apparatus for searching channel connection information of an ATM cell are provided to search a VC channel table by using only a VCI value of a received ATM cell and minimize time required for identifying channel connection information according to reduction of the memory occupancy number by obtaining areas of a channel information recording table as many as maximum channels to be used and recording channel connection information in an inherent area of each channel. CONSTITUTION: An ATM system ANDs a virtual pass mask value assigned to an inherent link number of a physical layer used for transmission of an ATM cell and a virtual pass identifier to generate an index of a virtual pass table previously stored in an external memory, and reads a VP(Virtual Path) mask value from an internal register(106) corresponding to the link number. Then, the ATM system ANDs a VPI(Virtual Path Identifier) value(102) of the ATM cell and the VP mask value read from the internal register(106) to generate a VP table index value. The ATM system adds the VP table index value and a VP base address value provided from the internal register(106) to generate a VP table address value. Subsequently, the ATM system reads out a VC(Virtual Channel) mask value stored in the VP table address of the VP table(112) having a plurality of VC mask values, and ANDs the read VC mask value and the VCI(Virtual Channel Identifier) value(104) of the ATM cell to generate a VC index value.
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