Abstract: An electronic device and a method of improving a performance of a software-defined networking (SDN) of the electronic device are provided. The method includes: identifying at least one policy from a flow table of the software-defined networking; identifying performance index parameters based on information about the at least one policy; determining whether or not an improvement in the performance of the software-defined networking is required based on the performance index parameters and a target performance index; when the improvement in the performance of the software-defined networking is determined to be required, executing a predetermined algorithm based on information about the performance index parameters to check execution information about the at least one policy; and updating the at least one policy based on the execution information.

Abstract: A method for modeling an information transmission network having a hierarchical structure, and an apparatus thereof. The apparatus is adapted to model an information transmission network having a hierarchical structure in which information transmission is conducted between pairs of nodes to which pre-defined relationships are assigned, the apparatus including: a connectivity map generating unit for generating connection relationship information for each node, on a basis of traffic information including data transmission direction information for nodes contained in the information transmission network and a connectivity map for the nodes on a basis of the connection relationship information for each node: and a traffic map generating unit for generating a traffic information map accounting for traffic intensities between pairs of the nodes by applying inter-node traffic information to the connectivity map.

Abstract: A method for modeling an information transmission network having a hierarchical structure, and an apparatus thereof. The apparatus is adapted to model an information transmission network having a hierarchical structure in which information transmission is conducted between pairs of nodes to which pre-defined relationships are assigned, the apparatus including: a connectivity map generating unit for generating connection relationship information for each node, on a basis of traffic information including data transmission direction information for nodes contained in the information transmission network and a connectivity map for the nodes on a basis of the connection relationship information for each node: and a traffic map generating unit for generating a traffic information map accounting for traffic intensities between pairs of the nodes by applying inter-node traffic information to the connectivity map.

Abstract: An Internet protocol (IP)-based ubiquitous sensor network (USN) system is disclosed. The IP-based USN includes a plurality of sensor nodes having unique IP addresses and an IP-USN router. The IP-USN router has a table that stores each location address of the sensor nodes and periodically broadcasts its own presence information for updating the location addresses stored in the table. The sensor nodes in the IP-based USN system have unique IP addresses. Therefore, desired information and services from any external network may be obtained.

Abstract: An Internet protocol (IP)-based ubiquitous sensor network (USN) system is disclosed. The IP-based USN includes a plurality of sensor nodes having unique IP addresses and an IP-USN router. The IP-USN router has a table that stores each location address of the sensor nodes and periodically broadcasts its own presence information for updating the location addresses stored in the table. The sensor nodes in the IP-based USN system have unique IP addresses. Therefore, desired information and services from any external network may be obtained.

Abstract: A blind watermarking method by grouping codewords for VQ-quantized images is disclosed. Especially there is provided a watermark insertion method in which a codebook is divided into three groups satisfying specific standards and a codeword is allocated based on the group to which the corresponding codeword belongs to insert watermark information, and a watermark extraction method for extracting the watermark inserted by the watermark insertion method. According to the present invention, watermark information can be uniformly inserted into an input vector space and the original image is not needed for extracting the watermark information.

Abstract: The method disclosed herein restricts overflooding due to address registration of an unstable asynchronous transfer mode (ATM) terminal through an interim local management interface (ILMI) protocol in an asynchronous transfer mode switch. The asynchronous transfer mode switch registers an address of the asynchronous transfer mode terminal using the interim local management interface protocol, and then determines whether the asynchronous transfer mode terminal is stable or not stable. When the asynchronous transfer mode terminal is not stable, the asynchronous transfer mode switch defers application of a private network-to-network interface (PNNI) until the asynchronous transfer mode terminal becomes stable.

Abstract: The present invention relates to a method and system for distinguishing higher layer protocols of the Internet traffic. The method comprises the steps of abstracting basic data from an arrival packet, determining whether or not the abstracted basic data exists in a predetermined administration table, registering a target protocol by selecting the target protocol in corresponding with a higher layer protocol of the arrival packet from a plurality of predetermined target protocols when the abstracted basic data don't exist in the predetermined administration table, renewing the administration table in accordance with the abstracted basic data when the abstracted basic data exists in the predetermined administration table.

Abstract: A blind watermarking method by grouping codewords for VQ-quantized images is disclosed. Especially there is provided a watermark insertion method in which a codebook is divided into three groups satisfying specific standards and a codeword is allocated based on the group to which the corresponding codeword belongs to insert watermark information, and a watermark extraction method for extracting the watermark inserted by the watermark insertion method. According to the present invention, watermark information can be uniformly inserted into an input vector space and the original image is not needed for extracting the watermark information.