INFORMATION SEARCH ENGINE Russian patent published in 1998 - IPC

FIELD: electric communication, in particular, for identification of TFTP communication protocol used in digital communication systems. SUBSTANCE: device has frequency divider 1, subtraction counter 3, commutator 4 which provide connection of input signal to different circuits of logical units. Memory unit 2 serves for storage of one packet of protocol under investigation. First selection unit 5 performs preliminary selection of input digital flow into packet bytes with code of operation. Second to fourth selection units 6-8 perform selection of packet structure in packet flow. Search strategy register 9 checks compliance of order of arrival of packets of digital flow under investigation with requirements of information exchange. Time interval generator 10 provides detection of moment when connection is closed. When signal passes through specific circuits of logical units, indication unit 11 generates information messages about search results. EFFECT: real-time operations, increased validity of search, zero probability of miss (in case of a priori information about protocol), simplified design and modification for arbitrary interface protocol. 8 cl, 11 dwg