Global Patent Index - EP 2654261 B8

EP 2654261 B8 20180228 - Circuit for the fast analysis of packet headers transferred via a data bus

Title (en)

Circuit for the fast analysis of packet headers transferred via a data bus

Title (de)

Schaltkreis für schnelle Analyse von über einen Datenbus übertragenen Paket-headern

Title (fr)

Circuit pour une analyse rapide des en-tetes des paquets transférés par un bus de données

Publication

EP 2654261 B8 20180228 (EN)

Application

EP 13158504 A 20130311

Priority

CZ 2012264 A 20120417

Abstract (en)

[origin: EP2654261A2] The solution deals with a connection for the fast analysis of packet headers by means of a circuit connected directly to the data bus (1), which transfers the packets. This circuit contains sub-circuits (3, 4, 9, 10) for the protocols headers analysis. Furthermore, the circuit contains a counter (2), which informs the sub-circuits (3, 4, 9, 10) about the data bus (1) status. Each of the sub-circuits (3, 4, 9, 10) is equipped with the data input from the data bus (1), the input of the counter (2), the activating input (3.1, 3.4, 5.2, 6.2), which determines the presence of the given protocol header in the packet, and with the input (3.2, 3.6, 7.1, 8.1) of the position of the header start in the packet. Further, each of the sub-circuits (3, 4, 9, 10) is equipped with a set of activating outputs (3.3, 3.4, 4.1, 4.2, 9.1, 10.1), which determine the type of the next protocol header, and with the output (3.6, 4.3, 9.2, 10.2) of the position of the next header start. All sub-circuits (3, 4, 9, 10), using the auxiliary logic circuits (5, 6) and multiplexers (7, 8), are connected in the structure, which corresponds to the number and structure of the anticipated protocols in the packet. Chain thus created from sub-circuits is then in the same manner divided into branches based on the anticipated number of protocols, the headers of which are to be analyzed. The outputs of the whole circuit are formed by the partial activating outputs (3.3, 3.4, 3.5, 4.1, 4.2, 9.1, 10.1) and the outputs (3.6, 4.3, 9.2, 10.2) of the position of the next header start.

IPC 8 full level

H04L 12/40 (2006.01); H04L 12/741 (2013.01); H04L 29/06 (2006.01); H04L 12/26 (2006.01)

CPC (source: EP US)

H04L 12/40 (2013.01 - EP US); H04L 45/74 (2013.01 - EP US); H04L 69/22 (2013.01 - EP US); H04L 43/18 (2013.01 - EP US)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

EP 2654261 A2 20131023; EP 2654261 A3 20170712; EP 2654261 B1 20171220; EP 2654261 B8 20180228; CZ 2012264 A3 20130710; CZ 303954 B6 20130710; US 2013272307 A1 20131017; US 8923300 B2 20141230

DOCDB simple family (application)

EP 13158504 A 20130311; CZ 2012264 A 20120417; US 201313855792 A 20130403