Patent application number | Description | Published |
20120143939 | MOBILE NODE AND METHOD FOR MAINTAINING SESSION USING LOGICAL INTERFACE - A mobile node and method suitable to allocate a single Internet protocol (IP) address to a physically independent interface and to provide a logical interface that connects between an application layer and the physical interface are provided. The mobile node includes an upper layer processing unit configured to perform a packet service; a physical interface unit configured to comprise multiple physical interfaces for access to multiple wireless networks; and a logical interface unit configured to allocate a single home IP address to the multiple physical interfaces and enable the upper layer processing unit to process a packet using the single home IP address, and to process packets belonging to the same session to be transmitted and received through the same physical interface from among the multiple physical interfaces. | 06-07-2012 |
20120151593 | DISTRIBUTED DENIAL OF SERVICE ATTACK DETECTION APPARATUS AND METHOD, AND DISTRIBUTED DENIAL OF SERVICE ATTACK DETECTION AND PREVENTION APPARATUS FOR REDUCING FALSE-POSITIVE - Provided is a DDoS attack detection apparatus including an information collecting unit to collect DDoS detection information including rate information about traffic change, variation of a first type flow and a Packet Per Second (PPS) for a second type flow, in which the rate information about traffic change is obtained using packet count of packets input per a unit time, flow count of flows input per the unit time and the byte count of bytes input per the unit time; and a testing unit to calculate a probability of occurrence of the DDoS attack by use of a first probability determined by the rate information about traffic change, a second probability determined by the variation of the first type flow and a third probability determined by the PPS for the second type flow and detect occurrence of the DDoS attack based on the probability of occurrence of the DDoS attack. | 06-14-2012 |
20130212241 | SYSTEM AND METHOD FOR OPERATING NETWORK BASED ON NETWORK VIRTUALIZATION - A virtual network operating apparatus and method are provided. The virtual network operating method includes configuring, by a virtual network operating apparatus, a plurality of virtual networks identified by domain names, setting, by the virtual network operating apparatus, representative virtual routers representing each of the virtual networks for each virtual network, setting, by the virtual network operating apparatus, representative routing information including an IP address of each of the representative virtual routers in each virtual router included in the virtual networks, and transmitting, by each virtual router, a packet using the set representative routing information. | 08-15-2013 |
Patent application number | Description | Published |
20100149965 | APPARATUS AND METHOD FOR RESTORING NETWORK CONNECTED WITH USERS HAVING DIFFERENT RECOVERY REQUIREMENTS - A method of restoring a target network to which users having different recovery requirements are connected is provided. The method includes analyzing network components including availability information of each user and parameters reflecting characteristics of the target network; and determining optimized restoration architecture for the target network based on the result of the analysis. Accordingly, when failure occurs in a network to which various subscribers having different recovery requirements are connected, the network can be promptly recovered from the failure. | 06-17-2010 |
20100158513 | APPARATUS AND METHOD FOR MEASURING SIGNAL PERFORMANCE AND APPARATUS FOR SELECTING SIGNAL - Provided are an apparatus and method for measuring signal performance and an apparatus for selecting a signal. The apparatus includes a wavelength selector selecting a signal having a specific wavelength from an input signal, a time selector selecting a signal input at a specific time from the selected signal having the specific wavelength, and a performance measurer measuring signal performance for the signal of the specific wavelength that is input at the specific time and selected by the time selector. Thus, it is possible to measure signal quality of each wavelength-division multiplexing (WDM)-time-division multiplexing (TDM) channel in a WDM-TDM hybrid environment. | 06-24-2010 |
20110044691 | APPARATUS AND METHOD FOR DETECTING OPTICAL SIGNALS - Disclosed are an apparatus and method for detecting optical signals. The optical signal detection apparatus includes: a signal receiver to convert a received optical signal into an electrical signal; a threshold decision unit to establish a mathematical model based on the electrical signal and to decide an optimized threshold value based on the mathematical model; and a signal detector to detect the electrical signal based on the optimized threshold value. Hence, since threshold values optimized adaptively according to received signals are used, a bit error rate may be lowered and accordingly detection performance may be improved. | 02-24-2011 |
20120128360 | OPEN OPTICAL ACCESS NETWORK SYSTEM - The present invention relates to an open optical access network system in which one optical access network is open to enable a plurality of service providers and a plurality of subscribers to simultaneously use the optical access network, to thereby improve the efficiency of using the optical access network, wherein each subscriber can be provided with a plurality of different services from the plurality of service providers, thereby enabling the flexible selection of services and the flexible change in services, thus improving the efficiency of using an optical infrastructure. | 05-24-2012 |
20120155876 | SEED LIGHT MODULE FOR WAVELENGTH DIVISION MULTIPLEXING-PASSIVE OPTICAL NETWORK AND METHOD FOR DRIVING THE SAME - A seed light module for a WDM-PON system is provided. The seed light module includes a reflector configured to reflect a part of seed light that is generated from a light source generator, and an optical attenuator configured to attenuate the intensity of the reflected seed light and provide the attenuated seed light, which corresponds to a signal generated by attenuating the intensity of the reflected seed light, to the light source generator. | 06-21-2012 |
20120163802 | WDM-TDM PON REMOTE TERMINAL AND WDM-TDM PON LINK PROTECTION SYSTEM - A wavelength division multiplexing (WDM)-time division multiplexing (TDM) passive optical network (PON) remote terminal (RT) is provided. The wavelength division multiplexing (WDM)-time division multiplexing (TDM) passive optical network (PON) remote terminal (RT), includes: a WDM-TDM converter configured to convert a WDM downstream optical signal that is received from a central office terminal (COT) into a TDM downstream optical signal or to convert a TDM upstream optical signal that is received from an optical network terminal (ONT) into a WDM upstream optical signal; an error detector configured to detect an error; and a controller configured to, in response to an error being detected, transmit the WDM upstream optical signal to the COT via a first standby link or transmit the TDM downstream optical signal to the ONT via a second standby link. | 06-28-2012 |
20120163819 | DATA TRANSMISSION APPARATUS AND METHOD FOR USE IN SEPARATE-TYPE BASE STATION - A data transmission apparatus for use in a separate-type base station is provided. The data transmission apparatus includes: a digital unit configured to generate first data that includes transmission method information indicating a selected transmission method and data to be transmitted; a time-division synchronization control unit configured to, in response to the selected transmission method being time-division multiplexing (TDM), generate second data by including synchronization information for transmitting the first data using TDM in the first data; and a wavelength conversion unit configured to convert at least one of the first data and the second data into one or more wavelength optical signals using a predefined wavelength or a predefined group of wavelengths and transmit the wavelength optical signals to one or more radio stations. | 06-28-2012 |
20120163822 | APPARATUS AND METHOD FOR DRIVING WAVELENGTH-INDEPENDENT LIGHT SOURCE - An apparatus for driving a wavelength-independent light source is provided. The apparatus includes a seed light signal generation unit configured to generate seed light signals with one or more wavelengths based on a wavelength identification signal, a wavelength light detection unit configured to detect the wavelength identification signal from the seed light signals, an extraction unit configured to extract wavelength information corresponding to the detected wavelength identification signal and extract a driving condition of a wavelength-independent light source corresponding to the extracted wavelength information, and a driving unit configured to drive the wavelength-independent light source according to the extracted driving condition. | 06-28-2012 |
20130004165 | AUTOMATIC WAVELENGTH RECOGNITION APPARATUS AND METHOD - Provided are an automatic wavelength recognition apparatus and method. The automatic wavelength recognition apparatus includes: a division unit receiving a single optical signal and dividing the received optical signal into a plurality of optical signals; a plurality of filter units filtering the optical signals and having different and wavelength-dependent pass characteristics; a plurality of detection units detecting the filtered optical signals and measuring intensities of the detected optical signals; at least one comparison unit comparing outputs of any two of the detection units; and a wavelength determination unit receiving an output of the at least one comparison unit and determining a wavelength of the above single optical signal using a pre-stored look-up table. | 01-03-2013 |
20130004174 | LINK SETUP METHOD FOR WAVELENGTH DIVISION MULTIPLEXING WAVELENGTH PASSIVE OPTICAL NETWORK(WDM PON) SYSTEM - A link setup method for a wavelength-division-multiplexing passive optical network (WDM PON) system. The system includes a service providing device, a local node, and a plurality of subscriber devices. The link setup method includes assigning an initial wavelength for communication between the service providing device and a new subscriber device to be installed in the local node. The assigning of the initial wavelength may be performed as a part of process for activating the subscriber device, and this procedure may be performed between a physical layer of the service providing device and a physical layer of the new subscriber device. | 01-03-2013 |
20130163629 | USER-SELECTABLE LASER AND OPTICAL TRANSMITTER HAVING THE SAME - Provided are a user-selectable laser and an optical transmitter including the same. The user-selectable laser is an external cavity laser including a semiconductor laser diode for outputting an optical signal, and a wavelength selection filter. The user-selectable laser may allow a user to select a wavelength selection filter which is optically coupled with the semiconductor laser diode and selectively causes oscillation at the wavelength of an optical signal output from the semiconductor laser diode. | 06-27-2013 |
20130223796 | ARRAYED WAVELENGTH GRATING ROUTER (AWGR) FOR WAVELENGTH MULTIPLEXING AND DEMULTIPLEXING - An Arrayed Waveguide Grating Router (AWGR) for wavelength multiplexing and demultiplexing is provided. According to an aspect, by generating phase differences of a plurality of received optical signals through an arrayed wavelength in which a plurality of waveguides having a predetermined length difference with respect to each other are arranged, and then coupling the optical signals with the different phase differences, wavelength multiplexing and wavelength demultiplexing are simultaneously performed using the maximum constructive interference and/or destructive interference effect of optical signals. | 08-29-2013 |
20130294768 | OPTICAL LAYER MONITORING APPARATUS AND METHOD THEREOF - An optical layer monitoring apparatus and method thereof are provided. According to an embodiment of the present invention, an optical layer monitoring apparatus including an optical time domain reflectometer (OTDR) function so as to monitor an optical path of a passive optical network (PON), and a method for improving accuracy of measured monitoring results using the optical layer monitoring apparatus are provided. Therefore, it is possible to enable a user to continuously detect distortion or attenuation along the optical path, and to quickly recover from the distortion or attenuation along the optical path when distortion or attenuation is detected. | 11-07-2013 |
20140133502 | WAVELENGTH-TUNABLE OPTICAL TRANSMISSION APPARATUS - A wavelength-tunable optical transmission apparatus including an optical array unit comprising a plurality of light sources whose wavelengths are changed, an optical driving unit configured to receive an electrical signal transmitted from an external circuit, generate the current and input the generated current to the optical array unit, and a control unit configured to control the magnitude of current input to the optical array unit by controlling the optical driving unit. | 05-15-2014 |
20140147118 | APPARATUS FOR TRANSMITTING/RECEIVING VARIABLE-WAVELENGTH OPTICAL SIGNAL - There is provided an optical transceiver apparatus including an optical transmitter configured to transmit light of variable wavelength, an optical receiver configured to receive light generated from an opposite light source, and a controller configured to perform initialization to a wavelength corresponding to when an intensity of light received by the optical receiver is greater than or equal to a reference power, while varying the wavelength of light output by the optical transmitter. | 05-29-2014 |
20140153933 | TRANSMITTER OPTICAL SUB-ASSEMBLY - A multi-channel transmitter optical sub-assembly (TOSA) is provided. The multi-channel TOSA includes a stem including a sub-mount, a plurality of light sources mounted on the sub-mount, a common ground pad disposed at the sub-mount and connected to ground electrodes of the light sources in common, a common lead pin installed at the stem, and connected to the common ground pad, and a thermistor mounted on the sub-mount along with the light sources. | 06-05-2014 |
20140186042 | OPTICAL RECEIVER HAVING WAVELENGTH RECOGNITION FUNCTION, AND DEVICE AND METHOD FOR RECOGNIZING WAVELENGTHS USING THE SAME - Provided are an optical receiver having a wavelength recognition function, and a device and method for recognizing wavelengths using the same. The optical receiver according to an embodiment of the invention includes a splitter configured to split light intensity of input optical signals, a first receiver configured to photoelectrically convert the optical signals split using the splitter, a filter having different pass band characteristics based on wavelengths of the optical signals split using the splitter, a second receiver configured to photoelectrically convert the optical signals passing through the filter, and a comparator configured to compare the optical signals respectively, photoelectrically converted by the first and second receivers and recognize wavelengths of the input optical signals. | 07-03-2014 |
Patent application number | Description | Published |
20120135675 | METHOD AND APPARATUS FOR CANCELING INTRODUCED SIGNAL AND COGNITIVE RADIO COMMUNICATION APPARATUS USING THE SAME - The present invention relates to a wireless communication system and, more particularly, to a spectrum sensing method in cognitive radio communication. According to an aspect of the present invention, a method of canceling an introduced transmission signal includes generating a first signal, having an inverse phase, using a data transmission signal transmitted by a data transmission unit, adjusting a path and/or an amplitude of the first signal, and generating a first signal, having an inverse phase, using a data transmission signal transmitted by a data transmission unit, adjusting a path and/or an amplitude of the first signal, and canceling a second signal, introduced through a data receiving unit, and the first signal by the data transmission signal. | 05-31-2012 |
20120140799 | METHOD AND APPARATUS FOR DETECTING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SIGNAL - Disclosed is a method for detecting single channel orthogonal frequency division multiplexing (OFDM) and channel bonded signals through a single channel receiver, the method including: receiving sensing data through a single channel receiving radio frequency chain; obtaining a cyclostationary feature of the sensing data; and determining presence of a signal on the basis of the cyclostationary feature of the sensing data. If it is determine that the signal exists, the kind of signal is determined by comparing the cyclostationary feature of the sensing data with a cyclostationary feature of a known OFDM signal. If it is determine that the signal exists, whether channels of the signal are bonded is determined by comparing the cyclostationary feature of the sensing data with a cyclostationary feature of a known OFDM signal. | 06-07-2012 |
20130170464 | APPARATUS AND METHOD FOR CONTROLLING SUBCARRIER SPACING IN A WIRELESS COMMUNICATION SYSTEM - Provided is an apparatus for controlling subcarrier spacing in a system supporting multiple frequency bands. The apparatus for controlling a subcarrier spacing comprises: an interference detection unit detecting interference over multiple frequency bands; a system parameter provision unit providing system parameters related to a subcarrier spacing between the multiple frequency bands—for example RF, FFT size, and channel bandwidth; a subcarrier spacing control unit controlling the subcarrier spacing such that the detected interference is reduced, on the basis of the system parameters. In a system operating with multiple bands, different subcarrier spacing can be applied by each band, thereby controlling interference occurring in each band. | 07-04-2013 |
20130177098 | METHOD AND DEVICE FOR SELECTING ANTENNA IN MULTI- ANTENNA SYSTEM - Provided is a method for selecting an antenna performed by a receiver in a multi-antenna system. The method for selecting the antenna performed by the receiver in the multi-antenna system, comprises: a subcarrier group setting step for setting subcarrier groups by grouping subcarriers; a channel information acquisition step for acquiring channel information between a receiving end antenna and each of a plurality of transmission end antennas; an antenna selecting step for determining said subcarrier groups, which are to be transmitted to each of the plurality of said transmission end antennas on the basis of said channel information; and an antenna selection information transmission step for transmitting antenna selection information, which contains the result of said antenna selection, to a transmission end. | 07-11-2013 |
Patent application number | Description | Published |
20110031007 | Electromagnetic interference noise reduction board using electromagnetic bandgap structure - As a multi-layered board, an EMI noise reduction board, having an electromagnetic bandgap structure with band stop frequency properties inserted into an inner portion of the board, includes a first area, in which a ground layer and a power layer are formed, and a second area, placed on a side surface of the first area, in which it has the electromagnetic bandgap structure formed therein so as to shield an EMI noise radiated to the outside through the side surface of the first area. The electromagnetic bandgap structure includes a plurality of first conductive plates, placed along the edge of the board, a plurality of second conductive plates, disposed on a planar surface that is different from the first conductive plates such that the second conductive plates are alternately disposed with the first conductive plates, and a via, which connects the first conductive plates to the second conductive plates. | 02-10-2011 |
20110067914 | Printed circuit board having electromagnetic bandgap structure - Disclosed is a printed circuit board into which an electromagnetic bandgap structure for blocking a noise is inserted. The electromagnetic bandgap structure can include a first conductor and a second conductor arranged on different planar surfaces, a third conductor arranged on a same planar surface that is different from a planar surface where the second conductor is arranged, and a first stitching via unit configured to connect the first conductor to the third connector through the planar surface where the second conductor is arranged and being electrically separated from the second conductor. The first conductor can include a first plate, a second plate spaced from the first plate, and a second stitching unit configured to electrically connect the first plate to the second plate through a planar surface that is different from a planar surface where the first plate and the second plate are arranged. | 03-24-2011 |
20110067915 | Electromagnetic interference noise reduction board using electromagnetic bandgap structure - An EMI noise reduction board is disclosed. The electromagnetic interference (EMI) noise reduction board having an electromagnetic bandgap structure for shielding a noise includes: a first area having a ground layer and a power layer; a second area placed in a side portion of the first area having an electromagnetic bandgap structure therein. The electromagnetic bandgap structure includes: a plurality of first conductive plates and a plurality of second conductive plates placed on a same planar surface along the side portion of the first area; and a stitching via configured to electrically connect the first conductive plate to the second conductive plate through a planar surface that is different from the first conductive plate and the second conductive plate. | 03-24-2011 |
20110067916 | Printed circuit board having electromagnetic bandgap structure - Disclosed is a printed circuit board into which an electromagnetic bandgap structure for blocking a noise is inserted. The electromagnetic bandgap structure can include a first conductive plate, a second conductive plate arranged on a planar surface that is different from that of the first conductive plate, a third conductive plate arranged on a planar surface that is different from that of the second conductive plate, a connection pattern arranged on a planar surface that is different from that of the second conductive plate, a first stitching via unit configured to connect the first conductive plate to one end of the connection pattern through the planar surface where the second conductive plate is arranged, and a second stitching via unit configured to connect the third conductive plate to the other end of the connection pattern through the planar surface where the second conductive plate is arranged. | 03-24-2011 |
Patent application number | Description | Published |
20120139712 | HYBRID SWITCH FOR EXTENDING ANTENNA PORT AND METHOD OF CONTROLLING THE SAME, AND RFID SYSTEM USING THE HYBRID SWITCH - A hybrid switch includes a plurality of antenna ports, a switching module for setting up a path so that a signal received from a reader passes through a designated antenna port from among the plurality of antenna ports, an antenna sense module for determining whether antennas have been attached to the plurality of antenna ports, and a communication module for processing a communication signal with the reader or a communication signal with other switch. According to the present invention, an electric wave fading zone can be obviated and RFID tags can be more efficiently recognized by increasing the number of antenna ports, without generating problems, such as the attenuation of transmission output of a reader and a reduction of the recognition ratio due to a collision between tags resulting from the constant transmission of power of the reader. | 06-07-2012 |
20120139795 | NEAR-FIELD ANTENNA - The present invention relates to a near-field antenna. In an aspect, the near-field antenna may include a dielectric layer, a ground plane formed on one side of the dielectric layer, a plurality of U-shaped slots periodically disposed in the ground plane for radiation, and a microstrip line provided on the other side of the dielectric layer for power feeding. In another aspect, the near-field antenna may include a dielectric layer, a ground plane formed on one side of the dielectric layer, a plurality of U-shaped slots periodically disposed in the ground plane for radiation, and a microstrip line configured to have a plurality of U-shaped slots diverged on the other side of the dielectric layer in parallel for power feeding, have the plurality of U-shaped slots periodically disposed in series in respective diverged lines, and have an end shorted to form standing waves. | 06-07-2012 |
Patent application number | Description | Published |
20100254399 | METHOD OF UPLINK IP PACKET FILTERING CONTROL IN MOBILE TERMINAL - A method for controlling uplink IP packet filtering in a mobile terminal in a 3GPP Evolved Packet System (EPS) is provided, including an information receiving operation of receiving IP address information allocated to user equipment, and filtering information required for delivering an uplink IP packet received from the user equipment; and a filtering operation for determining which packet data network and a bearer the IP packet is delivered to, based on the IP address information and the filtering information. In a 3GPP evolved packet system supporting a default bearer function, a packet data network to which an uplink IP packet is delivered and a bearer identifier can be efficiently determined when the user equipment simultaneously accesses one or more packet data networks and is allocated several IP addresses, resulting in effective uplink packet filtering. | 10-07-2010 |
20110038280 | USER EQUIPMENT AND BASE STATION IN CARRIER AGGREGATION SYSTEM, AND CALL ADMISSION CONTROL METHOD FOR USE WITH THE USER EQUIPMENT AND BASE STATION - Disclosed are user equipment and a base station in a carrier aggregation system, and a call admission method thereof. The user equipment includes a plurality of physical layers, and the base station provides multiple component carriers. When messages for connection setup are transmitted and received between the user equipment and base station, the messages include information about what component carriers are selected by the physical layers, information about what component carriers are selectable by the physical layers, and information about calculations for uplink timing alignment, and call admission control and load balancing is performed based on the information included in the messages. Accordingly, in the carrier aggregation system, quicker call admission and load balancing are achieved. | 02-17-2011 |
20140044068 | USER EQUIPMENT AND BASE STATION IN CARRIER AGGREGATION SYSTEM, AND CALL ADMISSION CONTROL METHOD FOR USE WITH THE USER EQUIPMENT AND BASE STATION - Disclosed are user equipment and a base station in a carrier aggregation system, and a call admission method thereof. The user equipment includes a plurality of physical layers, and the base station provides multiple component carriers. When messages for connection setup are transmitted and received between the user equipment and base station, the messages include information about what component carriers are selected by the physical layers, information about what component carriers are selectable by the physical layers, and information about calculations for uplink timing alignment, and call admission control and load balancing is performed based on the information included in the messages. Accordingly, in the carrier aggregation system, quicker call admission and load balancing are achieved. | 02-13-2014 |
Patent application number | Description | Published |
20110196015 | N 1-2-THIOPHENE-2-YLETHYL-N2-SUBSTITUTED BIGUANIDE DERIVATE, PREPARATION METHOD THEREOF, AND PHARMACEUTICAL COMPOSITION CONTAINING THE SAME AS ACTIVE INGREDIENTS - The present invention provides an N1-2-thiophen-2-ylethyl-N2-substituted biguanide derivative of formula (I) or a pharmaceutically acceptable salt thereof, a method for preparing same, and a pharmaceutical composition comprising same as an active ingredient. The inventive N1-2-thiophen-2-ylethyl-N2-substituted biguanide derivative exhibits improved blood glucose level- and lipid level-lowering effects even with a reduced dosage as compared to conventional drugs, and thus, it is useful for preventing or treating diabetes, metabolic syndromes such as insulin-independent diabetes, obesity and atherosclerosis, or a P53 gene defect-related cancer. | 08-11-2011 |
20110207810 | N1-BENZO[1,3]DIOXOL-5-YLMETHYL-N2-SUBSTITUTED BIGUANIDE DERIVATIVE, PREPARATION METHOD THEREOF, AND PHARMACEUTICAL COMPOSITION CONTAINING SAME - The present invention provides an N1-benzo[1,3]dioxol-5-ylmethyl-N2-substituted biguanide derivative of formula (I) or a pharmaceutically acceptable salt thereof, a method for preparing same, and a pharmaceutical composition comprising same as an active ingredient. The inventive N1-benzo[1,3]dioxol-5-ylmethyl-N2-substituted biguanide derivative exhibits improved blood glucose level- and lipid level-lowering effects even with a reduced dosage as compared to conventional drugs, and thus, it is useful for preventing or treating diabetes, metabolic syndromes such as insulin-independent diabetes, obesity and atherosclerosis, or a P53 gene defect-related cancer. | 08-25-2011 |
Patent application number | Description | Published |
20120127858 | METHOD AND APPARATUS FOR PROVIDING PER-SUBSCRIBER-AWARE-FLOW QOS - 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. | 05-24-2012 |
20120127859 | PACKET SCHEDULING METHOD AND APPARATUS BASED ON FAIR BANDWIDTH ALLOCATION - 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. | 05-24-2012 |
20120147749 | ROUTING APPARATUS AND METHOD FOR MOBILE AD-HOC NETWORK - 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. | 06-14-2012 |
20120147754 | HIGH-SPEED CONTENT INSPECTION APPARATUS FOR MINIMIZING SYSTEM OVERHEAD - 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. | 06-14-2012 |
20120147891 | APPARATUS AND METHOD FOR BALANCING LOAD ACROSS MULTIPLE PACKET PROCESSING ENGINES - 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. | 06-14-2012 |
20130167219 | APPARATUS AND METHOD FOR CYBER-ATTACK PREVENTION - 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. | 06-27-2013 |
20130215839 | METHOD AND APPARATUS FOR PROVIDING FAIRNESS-ASSURED QUALITY OF SERVICE IN CONTENTION-BASED WIRELESS NETWORK - A method of assuring QoS in consideration of fairness in a contention-based wireless network and a terminal for the same are provided. When a token is allocated by a wireless access point, the terminal determines priority of a data frame which the terminal intends to use in communication, through a scheme of splitting the allocated token. Therefore, fairness can be assured by selection of the terminal. | 08-22-2013 |