Abstract: Disclosed is a method and apparatus for transmitting an object which includes packets and is significant for an application of a receiver, the method including calculating a network latency between a sender and a receiver through a control message for transmitting a plurality of packets constituting the object, detecting that a specific packet is lost among the plurality of packets, calculating a retransmission required time required for retransmitting the specific packet, comparing the retransmission required time with a deadline, and transmitting a NACK message including information related to retransmission of the specific packet to the sender when the retransmission required time is within the deadline, wherein the network latency is used for calculating the deadline determined by latency times for transmission of the object.

Abstract: A device and method for controlling traffic transmission/reception in a network end terminal is provided. The method includes measuring a transmission/reception processing performance value of a first network stack and a transmission/reception processing performance value of a second network stack according to each central processing unit (CPU) core, reserving network performance required for an application on the basis of the transmission/reception processing performance value of the first network stack and the transmission/reception processing performance value of the second network stack measured according to each CPU core, and allocating a CPU core corresponding to the reserved network performance to a networking thread of the application to control traffic transmission/reception.

Abstract: Disclosed is a method and apparatus for transmitting an object which includes packets and is significant for an application of a receiver, the method including calculating a network latency between a sender and a receiver through a control message for transmitting a plurality of packets constituting the object, detecting that a specific packet is lost among the plurality of packets, calculating a retransmission required time required for retransmitting the specific packet, comparing the retransmission required time with a deadline, and transmitting a NACK message including information related to retransmission of the specific packet to the sender when the retransmission required time is within the deadline, wherein the network latency is used for calculating the deadline determined by latency times for transmission of the object.

Abstract: A device and method for controlling traffic transmission/reception in a network end terminal is provided. The method includes measuring a transmission/reception processing performance value of a first network stack and a transmission/reception processing performance value of a second network stack according to each central processing unit (CPU) core, reserving network performance required for an application on the basis of the transmission/reception processing performance value of the first network stack and the transmission/reception processing performance value of the second network stack measured according to each CPU core, and allocating a CPU core corresponding to the reserved network performance to a networking thread of the application to control traffic transmission/reception.

Abstract: Disclosed herein an application-based data transport device and method. The application-based data transport device includes: an application processing unit configured to generate application data for executing an application; a transport service processing unit configured to identify, in the application data, transport service information including at least one of network connection information, network performance information or combination thereof, which are required to execute the application, and to set a network environment based on the transport service information; and a transport processing unit configured to generate and transmit transport protocol data for transmitting the application data, based on the network environment and a transport protocol.

Abstract: Disclosed are a method of controlling a process based on a network operation mode and an apparatus therefor. A process controlling method performed in a network device includes determining an operation mode for an operating system of the network device, determining an entity for controlling a process based on the determined operation mode, and controlling the process through the determined entity. According to the present invention, it is possible to control a process lifecycle through the same interface regardless of the network operation mode.

Abstract: There are provided a method, a system, and a computer-readable recording medium for processing network traffic. A method for processing network traffic using a switching application specific integrated circuit (ASIC) includes generating, by a software forwarder operated in a software-based network operating system, a message including network processing information, transmitting the message to a switch manager operated in a hardware-based network operating system, learning, by the switch manager, the network processing information, and controlling the switching ASIC with reference to the learned information.

Abstract: A method for transiting an operation mode of a routing processor is provided, which allows each routing processor in a packet processing system to be transited among a slave operation mode, a slave stand-by mode, a master stand-by mode, and a master operation mode to allow the packet processing system to normally operate even though a failure occurs in the routing processor that is set in the master operation mode, a new routing processor is added, or the routing processor set in the master operation mode is initialized.

Abstract: A method and an apparatus for controlling a life-cycle of a process for a network operating system. The method includes, by a process manager, transmitting a first initialize command to processes in a system service space and registering processes that respond to the first initialize command when an operation of the network operating system starts; confirming failure statuses of the registered processes and controlling the registered processes to execute a designated service; transmitting, when the processes in the system service space execute the service, a second initialize command to processes in a networking service space and a networking application space and registering processes that respond to the second initialize command; and confirming failure statuses of the processes registered in response to the second initialize command and allocating roles to the respective processes in the networking service space and the networking application space.

Abstract: Disclosed herein are an apparatus and method for displaying images. The apparatus includes a first image output unit, a second image output unit, an image signal selection unit, and an image display unit. The first image output unit is set to master operation mode, and outputs an image signal to be displayed. The second image output unit is set to slave operation mode, and, if the first image output unit has failed, is switched to master operation mode and then continuously outputs the image signal or a new image signal. The image signal selection unit compares the IP source address of a received master message with previously stored address information, and then selects the image signal that is received from the first image output unit or the second image output unit that has a matching address. The image display unit displays the selected image signal.

Abstract: A method for transiting an operation mode of a routing processor is provided, which allows each routing processor in a packet processing system to be transited among a slave operation mode, a slave stand-by mode, a master stand-by mode, and a master operation mode to allow the packet processing system to normally operate even though a failure occurs in the routing processor that is set in the master operation mode, a new routing processor is added, or the routing processor set in the master operation mode is initialized.

Abstract: Disclosed are a method of controlling a process based on a network operation mode and an apparatus therefor. A process controlling method performed in a network device includes determining an operation mode for an operating system of the network device, determining an entity for controlling a process based on the determined operation mode, and controlling the process through the determined entity. According to the present invention, it is possible to control a process lifecycle through the same interface regardless of the network operation mode.

Abstract: Disclosed are a system for managing virtual private networks (VPNs) includes: terminals configured to transmit user data; a manager configured to transmit information for concealing networks and managing the VPNs; border gateways configured to decrypt the user data and perform a network address translation (NAT) procedure and a filtering procedure on the decrypted user data based on the information; and servers configured to receive the user data subjected to the NAT procedure and the filtering procedure, wherein the filtering procedure is a procedure discarding the user data to be transferred to the servers that are not allowed so as to allow the terminals to access only the allowed servers, the NAT procedure is a procedure changing an Internet protocol (IP) address used in a first network to an IP address used in a second network, and the first network and the second network are different networks.

Abstract: Disclosed is a packet processing method in a below binary stack (BBS) structure. A transmission packet processing method includes receiving a packet from a network layer, reassembling a packet for which a first fragmentation has been performed when the received packet is the packet for which the first fragmentation has been performed, encrypting the reassembled packet, performing a second fragmentation for the encrypted packet when the second fragmentation is necessary for the encrypted packet, adding a header to the packet for which the second fragmentation has been performed, and transmitting the packet with the header added thereto through a physical layer. Accordingly, an encryption function can be provided in the BBS structure.

Abstract: Disclosed herein are an apparatus and method for displaying images. The apparatus includes a first image output unit, a second image output unit, an image signal selection unit, and an image display unit. The first image output unit is set to master operation mode, and outputs an image signal to be displayed. The second image output unit is set to slave operation mode, and, if the first image output unit has failed, is switched to master operation mode and then continuously outputs the image signal or a new image signal. The image signal selection unit compares the IP source address of a received master message with previously stored address information, and then selects the image signal that is received from the first image output unit or the second image output unit that has a matching address. The image display unit displays the selected image signal.

Abstract: In a plurality of virtual tunnel routers including a first virtual tunnel router and a second virtual tunnel router, the first virtual tunnel router and the second virtual tunnel router request virtual network prefix information from a tunnel mapping controller. When the tunnel mapping controller generates virtual network prefix information of the first virtual tunnel router and the second virtual tunnel router, respectively, and transmits the same along with information of a list of adjacent virtual tunnel routers, the first virtual tunnel router and the second virtual tunnel router create a tunnel. With the tunnel established, the virtual network prefix information received by the first virtual tunnel router and second virtual tunnel router, respectively, is linked so that direct communication can be performed between the first virtual tunnel router and the second virtual tunnel router.

Abstract: A system for providing a video conference service is provided. The system includes a Multipoint Processor (MP) configured to process media occurring during a video conference so as to allow the processed media to be transmitted/received between user terminals; and one or more Multipoint Controller (MC) configured to control a session of a user terminal participating in a multi-participant video conference, wherein the MP and the MC are separate from each other.

Abstract: The invention relates to a method and an apparatus for controlling seamless handover between heterogeneous networks based on IPv6 over IPv4 tunneling. When IPv6 service is provided using tunneling in an IPv4 based network environment, handover of a mobile terminal between different networks is achieved through switching of an active tunnel and a standby tunnel, and thus handover between different networks is facilitated and data loss is prevented to secure continuity of service provided to the mobile terminal even when the mobile terminal hands over to a heterogeneous network.

Abstract: In order to select a conference processing device to host a video conference between conference participation devices, a video conference system selects conference processing devices that are positioned most adjacent to each of conference participation devices that participate in the video conference as candidates for a conference processing device. The video conference system forms network topology based on candidate conference processing devices and conference participation devices, and aligns candidate conference processing devices based on preset alignment reference information. The video conference system selects one of the aligned candidate conference processing devices as an optimal conference processing device to host the video conference.

Abstract: The present invention relates to tunneling an IPv6 packet through an IPIv4 network. In using a tunneling method upon transmitting an IPv6 packet in an IP network, when destination nodes desired to be communicated are located within the same IPv6 prefix network, IPv6 prefix information is added for the management of a tunnel entry. Hence, tunneling information on terminals located within the same IPv6 prefix network can be managed as one tunnel entry. Accordingly, the time consumed when retrieving a tunnel entry can be reduced.