Electronics and Telecommunications Research Institute

Kt Corporation

Young-Sun Kim

Do-Young Kim

Byungjun Ahn

Jong-Arm Jun

Byung-Tak Lee

Sung-Hyuk Byun

Woon-Seob So

Sim-Kwon Yoon

Gil-Haeng Lee

JongMo Sung

Woo-Young Choi

Jae-Wook Lee

Il-Kyun Park

Seok-Kap Ko

Gwan-Joong Kim

Provided is a method of supporting CoAP-based sensor data transmission between a sensor data collector in a sensor node relay and one or more 6LoWPAN-unsupported sensor nodes. The method includes receiving a CoAP sensor data request message from the sensor data collector, transmitting a CoAP sensor data request message to a corresponding 6LoWPAN-unsupported sensor node by analyzing the received CoAP sensor data request message, and responding to the sensor data collector by creating a CoAP sensor data response message including sensor data received from one or more of the 6LoWPAN-unsupported sensor nodes.

Device and method for supporting internet-based sensor data transmission

A caller identification system provides a caller identifier of an actual user rather than the conventional telephone number dependent on a caller terminal. Further, a caller base billing method and its system can bill an actual user by carrying out user authentication through a certification authority for a caller identifier that is independent of a caller terminal. The method includes the steps of receiving authentication information of the caller from a caller terminal; verifying the authentication information; and carrying out call setup if the authentication information and the certificate match, wherein the authentication information is generated by using a caller identifier and a private key that are applied by the caller, with no dependency on the caller terminal, and caller information corresponding to the caller identifier is transmitted to a callee terminal during call setup.

Caller identification method, and billing system and method using the same in internet telephony

A system for measuring a communication quality and a method thereof are disclosed. The system includes: a first communication quality measuring unit for requesting a second communication quality measuring unit to transmit a test traffic, measuring a communication quality from the test traffic received from the second communication quality measuring unit as a response of the request, and controlling a generation frequency and an amount of test traffic for a next communication quality measuring stage by analyzing the measured communication quality; and the second communication quality measuring unit for generating a test traffic by controlling a generation frequency and an amount of the test traffic according to a request of the first communication quality measuring unit.

System for measuring communication quality and method thereof

There is provided a packet forwarding processing apparatus of a high speed routing system and a routing lookup method using the same. The packet forwarding processing apparatus includes: a routing table storage unit; a routing table management unit; and a routing table lookup unit. The routing table storage unit is used for storing routing table entries which are built based on a collected routing information. The routing table management unit is used for modifying, creating, and deleting the table entries of the routing table storage unit. The routing table lookup unit is used for looking up destination route information from the routing tables stored in routing table storage unit, in which the destination route information is associated with destination address extracted from an input data packet.

Packet forwarding apparatus of high speed routing system and routing lookup method using the same

Provided is an apparatus for developing and verifying a system-on-chip for an Internet phone. The object of the present invention is to provide the system-on-chip developing and verifying apparatus for the Internet phone, which can develop and verify the system-on-chip simultaneously by integrating an Advanced RISC Machine(ARM) core module, a field programmable gate array (FPGA), a peripheral interface and the system-on-chip. The apparatus includes an ARM core module performing a core processor function, a peripheral interface including a memory and many external input/output devices, a FPGA controlling the ARM core module and performing a control function for connecting the ARM core module and the peripheral interface, and a system-on-chip integrating the functions of the ARM core module and the FPGA.

Apparatus for developing and verifying system-on-chip for internet phone

A high speed and high capacity switching apparatus is disclosed. The apparatus includes: N input ports each of which for outputting maximum l cells in a time slot, wherein each of the N input ports includes N virtual output queues (VOQs) which are grouped in l virtual output queues group with n VOQs; N&#xd7;N switch fabric having lcrossbar switch units for scheduling cells inputted from N input ports based on a first arbitration function based on a round-robin, wherein l VOQ groups are connected to l XSUs; and N output ports connected to l XSUs for selecting one cell from l XSUs in a cell time slot by scheduling cells by a second arbitration function based on a backlog weighed round-robin, which operates independently of the first arbitration function, and transferring the selected cell to its output link.

Scalable crossbar matrix switching apparatus and distributed scheduling method thereof

A maintenance method for a subscriber line of a B-NT in an ATM PVC switching system which is capable of more expanding a maintenance range of an OAM cell loopback function disclosed in the article 2. The method includes the steps of a first step in which a loopback OAM cell is transmitted to a B-NT when the ATM PVC switching system receives a request of a state information of subscriber links of a B-NT from an operator, or a loopback operation timer becomes time-out, a second step in which the B-NT, which receives a loopback OAM cell from the ATM PVC switching system, carries the statement information of subscriber lines of B-NT apparatus on a loopback OAM cell and then transmits the information to the ATM PVC switching system, and a third step in which the ATM PVC switching system, which receives a loopback OAM cell from the B-NT apparatus, stores a state information of subscriber lines into a state management table, reports a state information of subscriber lines to the system operator.

Growing community of inventors

Daejon, South Korea

Young-Sun Kim