초록 ▼

An improved method and transceiver for using the method for detecting header errors includes a header processor for reconfiguring an ATM cell header by extracting the 8 bit header error check (HEC) and replacing it with an enhanced 16 or 24 bit HEC (EHEC). On the receive path, the received header is

An improved method and transceiver for using the method for detecting header errors includes a header processor for reconfiguring an ATM cell header by extracting the 8 bit header error check (HEC) and replacing it with an enhanced 16 or 24 bit HEC (EHEC). On the receive path, the received header is compared to the EHEC and if errors are indicated, the cell is discarded. Enhancements include FEC encoding on the entire cell during transmission, and if during reception uncorrectable errors exist using said EHEC to determine whether the error is in the header or is in the payload. If a cell with an error in its payload belongs to a group of related cells, for example an AAL5 frame, the system discontinues the transmission of the remaining cells of the frame.

대표청구항 ▼

An improved method and transceiver for using the method for detecting header errors includes a header processor for reconfiguring an ATM cell header by extracting the 8 bit header error check (HEC) and replacing it with an enhanced 16 or 24 bit HEC (EHEC). On the receive path, the received header is

An improved method and transceiver for using the method for detecting header errors includes a header processor for reconfiguring an ATM cell header by extracting the 8 bit header error check (HEC) and replacing it with an enhanced 16 or 24 bit HEC (EHEC). On the receive path, the received header is compared to the EHEC and if errors are indicated, the cell is discarded. Enhancements include FEC encoding on the entire cell during transmission, and if during reception uncorrectable errors exist using said EHEC to determine whether the error is in the header or is in the payload. If a cell with an error in its payload belongs to a group of related cells, for example an AAL5 frame, the system discontinues the transmission of the remaining cells of the frame. UB>alkyl, SMe, NMe2,R6,or O(CH2)pR7,where p is 3 or 4 and R7is CN, CO2Me, 2-(1,3-dioxolanyl), OH, or OC6H5, wherein: R6is phenyl, heterocyclyl, C3-6cycloalkyl, C1-6alkyl, C2-6alkenyl, C1-6alkyloxyalkyl, C1-6alkylthioalkyl, C1-6alkylsulfinylalkyl, C1-6alkylsulfonylalkyl, or C2-6alkynyl and R6is optionally substituted with halogen, --OH, alkyloxy, --CN, --COO-lower alkyl, --CONH-lower alkyl, --CON(lower alkyl)2,dialkylamino, phenyl, or heterocyclyl, or a pharmaceutically acceptable derivative thereof.