Cell
delineation (2)
Method 2 is usually preferred over
Method 1 (better
performance)
Method 2: using the HEC byte
We take 4 x 8 consecutive bits from the received bit stream and calculate
the checksum
If the checksum = the next byte (= HEC byte), we have found the header of
an ATM cell. If not, we shift one bit position and repeat the calculation ...
Checksum =
HEC byte ?