Patents by Inventor Nam Seok Ko
Nam Seok Ko has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20130265876Abstract: Provided are an apparatus and method for controlling packet flow in a multi-stage switch. According to an aspect, there is provided an apparatus for controlling packet flow in a multi-stage switch, including: one or more source line cards configured to receive one or more packets, and to transfer the one or more packets to a switch fabric including a plurality of switch modules forming one or more switching stages such that the one or more packets are transferred along different switching paths in the switch fabric; and a destination line card configured to receive the one or more packets output from the switch fabric, and to transfer Acknowledge (ACK) messages for informing that the packets have been received, to the source line cards, in a predetermined time period.Type: ApplicationFiled: November 20, 2012Publication date: October 10, 2013Applicant: Electronics and Telecommunications Research InstituteInventors: Jong-Tae SONG, Yool KWON, Kyung-Gyu CHUN, Heuk PARK, Nam-Seok KO, Hea-Sook PARK
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Patent number: 8514714Abstract: A device for providing forwarding and QoS information in a flow based network environment acquires first information and second information from a flow table therein on the basis of status information of a predetermined flow in order to provide dynamically updated information in a flow based network environment. When it is determined that first information and second information acquired based on a route ID of a series of information are updated, the flow table is updated and the updated information is provided.Type: GrantFiled: October 6, 2010Date of Patent: August 20, 2013Assignee: Electronics and Telecommunications Research InstituteInventors: Nam Seok Ko, Soon Seok Lee, Hyunjoo Kang, Seong Moon, Jong Dae Park, Seungwoo Hong, Kyeong Ho Lee
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Publication number: 20130163610Abstract: Provided is a packet forwarding structure for supporting network based content caching of aggregate contents. The packet forwarding structure includes: a forwarding table including forwarding information on a content in order to forward a request packet from a terminal; a request list table transmitting the request packet to a destination node according to the forwarding table when the request packet arrives; a content caching information table including the forwarding table, the request list table, and position information on where a content cashed based on a content ID or a content name is stored; and a content server function block storing the cached content.Type: ApplicationFiled: September 14, 2012Publication date: June 27, 2013Applicant: Electronics and Telecommunications Research InstituteInventors: Nam Seok KO, Sung Kee NOH, Jong Dae PARK
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Publication number: 20130167219Abstract: Provided are a method of preventing cyber-attack based on a terminal and a terminal apparatus therefor. The terminal apparatus includes: a packet processor configured to determine whether excessive traffic is generated by a transmission packet; an anomalous traffic detecting unit configured to determine whether anomalous traffic is generated, using a first condition of the excessive traffic being maintained for a first time period and a second condition of a generation count of the same kind of transmission packets exceeding a predetermined threshold value for a second time period; and a traffic block request unit configured to generate a traffic block request signal for requesting blockage of the transmission packet according to the result of determining whether anomalous traffic is generated.Type: ApplicationFiled: September 14, 2012Publication date: June 27, 2013Applicant: Electronics and Telecommunications Research InstituteInventors: Woo-Sug JUNG, Jong-Dae PARK, Byung-Ho YAE, Tae-Soo CHUNG, Sung-Kee NOH, Sung-Jin MOON, Nam-Seok KO, Hwan-Jo HEO
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Publication number: 20120147754Abstract: A high-speed content inspection apparatus for minimizing system overhead is provided. The high-speed content inspection apparatus extracts content in unit of sub-pattern by inspecting a payload of a packet in units of sub-pattern, and extract target content by inspecting a correlation between the extracted sub-patterns. If a sub-pattern present at the end of a payload is smaller than a predetermined unit of a sub-pattern, position information of the sub-pattern at the end of the payload is rolled back and the correlation is inspected. Accordingly, without having to add another hardware or high-performance hardware, target content can be efficiently detected in real time.Type: ApplicationFiled: December 13, 2011Publication date: June 14, 2012Applicant: ELECTRONICS AND TELELCOMMUNICATIONS RESEARCH INSTITUTEInventors: Woo-Sug Jung, Jong-Dae Park, Byung-Ho Yae, Sung-Kee Noh, Sung-Jin Moon, Nam-Seok Ko, Hwan-Jo Heo
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Publication number: 20120147749Abstract: A routing apparatus and method for a mobile ad-hoc network are provided. The routing apparatus selects a transmission path differently based on the priority of a message, thereby distributing paths such that the overall energy balance between mobile nodes can be maintained. Accordingly, congestion of traffic on a particular path can be prevented, and the overall performance and the lifetime of the network can be enhanced.Type: ApplicationFiled: November 30, 2011Publication date: June 14, 2012Applicant: Electronics and Telecommunications Research InstituteInventors: Sung-Jin MOON, Hwan-Jo HEO, Nam-Seok KO, Woo-Sug JUNG, Sung-Kee NOH, Byung-Ho YAE, Jong-Dae PARK
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Publication number: 20120147891Abstract: A distributed packet processing apparatus capable of distributing packet load across a plurality of packet processing engines is provided. The distributed packet processing apparatus includes a plurality of processing engines each configured to process allocated packets, a first tag generating unit configured to allocate an input packet to a processing engine, which has a processing engine index corresponding to a tag index for the input packet, among the plurality of processing engines, a second tag generating unit configured to calculate a tag index for an output packet, and an index conversion unit configure to convert the tag index for the output packet to one processing engine index among a plurality of processing indexes for the plurality of the processing engines and allocates the output packet to a processing engine having the one processing engine such that loads are distributed among the plurality of processing engines.Type: ApplicationFiled: December 12, 2011Publication date: June 14, 2012Applicant: Electronics and Telecommunication Research InstituteInventors: Hwan-Jo HEO, Nam-Seok Ko, Woo-Sug Jung, Sung-Jin Moon, Sung-Kee Noh, Jong-Dae Park, Byung-Ho Yae
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Publication number: 20120127858Abstract: A packet scheduling apparatus and method to fairly share network bandwidth between multiple subscribers and to fairly share the bandwidth allocated to each subscriber between multiple flows are provided. The packet scheduling method includes calculating first bandwidth for each subscriber to fairly share total bandwidth set for the transmission of packets between multiple subscribers; calculating second bandwidth for each flow to fairly share the first bandwidth between one or more flows that belong to each of the multiple subscribers; and scheduling a packet of each of the one or more flows based on the second bandwidth.Type: ApplicationFiled: November 18, 2011Publication date: May 24, 2012Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Nam-Seok KO, Jong-Dae Park, Byung-Ho Yae, Sung-Kee Noh, Woo-Sug Jung, Sung-Jin Moon, Hwan-Jo Heo, Soon-Seok Lee
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Publication number: 20120127859Abstract: A packet scheduling method and apparatus which allows multiple flows that require data transmission to the same output port of a network device such as a router to fairly share bandwidth. The packet scheduling method includes calculating an expected time of arrival of a (k+1)-th packet subsequent to a currently input k-th packet of individual flows by use of bandwidth allocated fairly to each of the flows and a length of the k-th packet; in response to the arrival of the (k+1)-th packet, comparing the expected time of arrival of the (k+1)-th packet to an actual time of arrival of the (k+1)-th packet; and scheduling the (k+1)-th packet of each flow according to the comparison result.Type: ApplicationFiled: November 21, 2011Publication date: May 24, 2012Applicant: Electronics and Telecommunications Research InstituteInventors: Nam-Seok KO, Jong-Dae PARK, Byung-Ho YAE, Sung-Kee NOH, Woo-Sug JUNG, Sung-Jin MOON, Hwan-Jo HEO, Soon-Seok LEE
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Publication number: 20110267949Abstract: There are provided a quality of service (QoS)-providing system and a method for providing quality of service for mobile nodes in the QoS-providing system. Under a network environment running a host-based network layer mobility protocol based on tunneling mechanism, the QoS-providing system may be useful to allow effective mobility supports by distributing binding information to the distributed nodes, in order to provide session-based quality of service for tunneled packets between the mobile nodes on the access nodes and distribute traffic load concentrated on the central mobility control platform as well. Also, the QoS-providing system according to one exemplary embodiment of the present invention may be useful to provide the function of hiding locations of mobile nodes since a care-of address of the mobile node is not transferred to a correspondent node and to automatically perform a route optimization procedure even when the mobile node does not directly perform a route optimization procedure.Type: ApplicationFiled: September 17, 2009Publication date: November 3, 2011Inventors: Nam-Seok Ko, Sung-Back Hong, Bong-Tae Kim, Kyeong-Ho Lee
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Patent number: 7933241Abstract: A communication method for using bandwidth efficiently in Internet protocol version 6 (IPv6) is provided to minimize use of header information that is added when the terminal is moved. According to the present invention, while maintaining compatibility between general terminals that conform to the mobile IPv6, bandwidth can be more efficiently used for terminals supporting functions defined in the present invention.Type: GrantFiled: October 17, 2007Date of Patent: April 26, 2011Assignee: Electronics and Telecommunications Research InstituteInventors: Nam Seok Ko, Sung Back Hong, Kyeong Ho Lee
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Publication number: 20110085552Abstract: Technology for forming a virtual private network (VPN) is provided. A VPN gateway that supports mobility with a connection node having a virtual home address (HoA) and a care of address (CoA) includes a mobility support unit, a data security unit, and a virtual address converter. When a packet is transferred from the connection node, the mobility support unit sustains a binding relationship between a home address (HoA) of the connection node and the changed CoA, and processes a mobility tunnel for the packet, thereby generating a first conversion packet. The data security unit performs a security test of the first conversion packet. The virtual address converter converts the HoA of the connection node, which is a source address of the first conversion packet in which the security test is complete, to a private network internal address that can be used in the VPN, thereby generating a second conversion packet.Type: ApplicationFiled: October 14, 2010Publication date: April 14, 2011Applicant: Electronics and Telecommunications Research InstituteInventors: Seungwoo HONG, Jong Dae Park, Sung Kee Noh, Ho Yong Ryu, Kyeong Ho Lee, Seong Moon, Pyung-Koo Park, Ho Sun Yoon, Nam Seok Ko, Sun Cheul Kim, Soon Seok Lee, Sung Back Hong
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Publication number: 20110080830Abstract: A device for providing forwarding and QoS information in a flow based network environment acquires first information and second information from a flow table therein on the basis of status information of a predetermined flow in order to provide dynamically updated information in a flow based network environment. When it is determined that first information and second information acquired based on a route ID of a series of information are updated, the flow table is updated and the updated information is provided.Type: ApplicationFiled: October 6, 2010Publication date: April 7, 2011Applicant: Electronics and Telecommunications Research InstituteInventors: Nam Seok KO, Soon Seok Lee, Hyunjoo Kang, Seong Moon, Jong Dae Park, Seungwoo Hong, Kyeong Ho Lee
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Publication number: 20110080909Abstract: Provided is a network-based Internet Protocol (IP) multicast service reception controlling apparatus and method. Data corresponding to a multicast channel may be controlled based on a snooping table. The snooping table may be updated based on the service profile. The snooping table may be updated based on a control message, and the control message may be based on whether a user is subscribed to the multicast channel. Whether data corresponding to the multicast channel is to be transmitted may be determined based on whether the data is being transmitted to another user in response to a request from the other user.Type: ApplicationFiled: September 23, 2010Publication date: April 7, 2011Applicant: Electronics and Telecommunications Research InstituteInventors: Nam Seok KO, Soon Seok LEE, Yoo Hwa KANG, Sung Kee NOH, Hea Sook PARK, Sung Back HONG
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Publication number: 20110044337Abstract: In a system for providing an IPTV service, if a multicast address of an IPTV channel received from a head-end is a multicast address requested by a mobile node through a tunnel, an end router confirms a care of address (CoA) of the mobile node corresponding to the multicast address of the IPTV channel, sets the multicast address in the first header of broadcasting traffic, sets the CoA of the mobile node in the second header of the broadcasting traffic, and then sends the broadcasting traffic.Type: ApplicationFiled: August 18, 2010Publication date: February 24, 2011Applicant: Electronics and Telecommunications Research InstituteInventors: Pyung-Koo Park, Nam Seok Ko, Jong Dae Park, Sung Kee Noh, Soon Seok Lee, Sung Back Hong
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Publication number: 20110023088Abstract: A traffic analysis and flow-based dynamic access control system and method. The flow-based dynamic access control system for controlling a user's access to an internal communication network through an external communication network includes an access control unit operating in an access control mode in which traffic received from a user is basically blocked, generating state management information of a flow, which is received from the user, based on a specified packet of the flow, and verifying whether access of the flow to the internal communication network is a normal access. As a proactive defense concept of allowing only normal users to access an internal network, a method of blocking attacks from a system contaminated by a worm virus, detecting a cyber attack on a certain system in advance and automatically avoiding the cyber attack, and guaranteeing the quality of normal traffic even under cyber attacks without performance degradation of the internal network is provided.Type: ApplicationFiled: July 23, 2010Publication date: January 27, 2011Applicant: Electronics and Telecommunications Research InstituteInventors: Nam-Seok KO, Soon-Seok Lee, Jong-Dae Park, Sung-Kee Noh, Pyung-Koo Park, Seung-Woo Hong, Sung-Back Hong, Seong Moon
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Publication number: 20100272016Abstract: A method and system for supporting Internet protocol (IP) mobility independently of the IP version of a transport network are provided. The method includes providing a mobility control apparatus, which maps the home addresses of a plurality of mobile terminals, including first and second mobile terminals, and the Care-of-Addresses (CoAs) of the mobile terminals, and setting a first control tunnel between the mobility control apparatus and the first mobile terminal, the care-of-addresses varying from one transport network to another transport network; setting a second control tunnel between the mobility control apparatus and the second mobile terminal; and enabling the first and second mobile terminals to exchange a data packet with each other through the first and second control tunnels.Type: ApplicationFiled: December 4, 2008Publication date: October 28, 2010Inventors: Nam Seok Ko, Ho Yong Ryu, Sung Back Hong, Young Beom Choi, Kyeong Ho Lee, Kyung Pyo Jun
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Patent number: 7782864Abstract: An apparatus and a method for providing a QoS for a multi protocol label switching (MPLS) traffic are provided. According to the apparatus and the method, a label and an experimental (EXP) are extracted from an MPLS packet input to an MPLS network system, and then applied to a predetermined hash function to generate at least one hash value. Also, a QoS policy is applied to an MPLS session, and the MPLS packet is forwarded. Therefore, the QoS for transmitting the MPLS packet input to the MPLS network system can be ensured.Type: GrantFiled: October 6, 2006Date of Patent: August 24, 2010Assignee: Electronics and Telecommunications Research InstituteInventors: Nam Seok Ko, Soo Myung Park, Sung Back Hong
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Patent number: 7664088Abstract: Provided is a QoS providing method using a flow label in providing multimedia service in an IPv6 network and a system applying the same. According to the method, a signal connection server extracts session information from a communication request response signal transmitted from a destination in response to a communication request signal of a source, and transmits the extracted session information to a QoS provisioning server. The QoS provisioning server receives the session information, and generates a session key including flow label, and sets QOS information corresponding to the session key. The QoS provisioning server transmits the session key and the QoS information to an IPv6 node, and transmits QoS provisioning completion information to the signal connection server. When the signal connection server receives the QoS provisioning completion information, the signal connection server transmits the received communication request response signal to the source.Type: GrantFiled: December 7, 2006Date of Patent: February 16, 2010Assignee: Electronics and Telecommunications Research InstituteInventors: Nam Seok Ko, Sung Back Hong
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Patent number: 7394836Abstract: Provided are a packet scheduling system and method capable of fair link resource distribution among a plurality of sessions requesting transmissions to an identical output link in input and output interfaces of a node in a high-speed packet exchange network such as an ATM network or the Internet. The packet scheduling system uses a traffic classifier which classifies traffic input from a plurality of input links, for each session; a central management unit which manages the agreed speed for each session and the virtual time of a system; a virtual finish time calculation unit which in response to the agreed speed and the system virtual time, calculates the virtual finish time of each packet for the traffic and attaches the calculated virtual finish time to the head of the packet as a time stamp.Type: GrantFiled: November 6, 2003Date of Patent: July 1, 2008Assignee: Electronics and Telecommunications Research InstituteInventors: Nam Seok Ko, Dong Yong Kwak