Third US patent for CESNET

Prague, 7 January 2015. Connection for the fast analysis of packet headers transferred via data bus. This is the name under which CESNET applied for a US patent for yet another of its unique solutions. The United States Patent and Trademark Office found the invention to be really new and useful and granted it patent deed No. 8 923 300 on 30 December 2014.

This is the third US patent received by CESNET. In late 2012, the Office issued a patent deed for a Device for Multicast of Optical Signals in the Internet and Other Networks. Last January, CESNET successfully patented its Modular Set of Devices for Optical Amplification of Signal by Raman Fiber Amplifier.

The patent-protected connection for the fast analysis of packet headers can find industrial applicability in packet processing circuits. When compared to commonly applied solutions, it can accelerate the packet headers analysis process, thus contributing to acceleration of the whole system. The patented invention will be used in further research and development but it has also found direct commercial application in practice already. Under a technology transfer contract, the patent is licensed to INVEA-TECH a. s., a company that integrates it into its hardware-accelerated high-speed network monitoring solutions.

Design principle

The connection for the fast analysis of packet headers is directly connected by a circuit to a data bus that transfers packets. The circuit contains sub-circuits for protocol header analysis and a counter that informs the sub-circuits about data bus status. Each of the sub-circuits is equipped with a data input from the data bus, an input of the counter, an activating input, which determines the presence of a given protocol header in a packet, and an input of the position of the header start in the packet. Furthermore, each of the sub-circuits is equipped with a set of activating outputs, which determine the type of the next protocol header, and with an output of the position of the next header start. Using auxiliary logic circuits and multiplexers, all the sub-circuits are connected in a structure that corresponds to the number and structure of anticipated protocols in the packet. The chain thus created from the sub-circuits is then divided into branches in the same manner, based on the anticipated number of protocols the headers of which are to be analysed.

The CESNET Association was founded by Czech universities and the Academy of Sciences of the Czech Republic in 1996. It is engaged in research and development in information and communication technologies and builds and develops the CESNET national e-infrastructure for research and education. With its research activities and accomplishments, CESNET represents the Czech Republic in international projects, most notably the pan-European GÉANT network building project and grid projects (, and participates actively in their implementation.

Last change: 12.1.2015