Electronics and Telecommunications Research Institute

Chei-Yol Kim

Young-Ho Kim

Su-Min Jang

Jin-Ho On

Gyu-Il Cha

Sung-In Jung

Sang-Min Lee

Hee-Bum Jung

Hong-Yeon Kim

Soo-Young Kim

Kang-Ho Kim

Young-Kyun Kim

Young-Chang Kim

Eun-Ji Lim

Jin Ho On

Jeong-Sook Park

SooCheol Oh

Gyuil Cha

Myung-Joon Kim

Kwang-Won Koh

Dong-Jae Kang

Sung Hoon Son

Seung-Hyub Jeon

Chang-Won Ahn

Dong-Oh Kim

Young-Chul Kim

Sung-Hoon Son

Disclosed is an operating method of a surface code-based quantum simulation device including physical qubit storage, which includes storing initialized entanglement states of logical qubits corresponding to different distances, receiving a surface code-based initialization request corresponding to a specific distance, and storing an initialized entanglement state of a logical qubit corresponding to the specific distance from among the initialized entanglement states of the logical qubits corresponding to the different distances in the physical qubit storage.

Quantum simulation device and operating method of quantum simulation device

Disclosed is a quantum computing system including a first quantum chip including first physical qubits, a second quantum chip including second physical qubits, and a management device. The management device includes a physical qubit layer that manages physical qubit mapping including information about physical channels between first and second physical qubits, an abstraction qubit layer that manages abstraction qubit mapping including information about abstraction qubits and abstraction channels between the abstraction qubits based on the physical qubit mapping, a logical qubit layer that divides the abstraction qubits into logical qubits and to manage logical qubit mapping including information about logical channels between the logical qubits, based on the abstraction qubit mapping, and an application qubit layer that allocates at least one logical qubit corresponding to a qubit request received from a quantum application program based on the logical qubit mapping.

Quantum computing system and operation method thereof

A method and apparatus are disclosed which relate generally to worker-scheduling technology in a serverless cloud-computing environment, and more particularly, to technology that allocates workers for executing functions on a micro-function platform which provides a function-level micro-service. The method and apparatus process a worker allocation task in a distributed manner as two-step pre-allocation schemes before a worker allocation request occurs, and pre-allocates workers required for a service using a function request period and a function execution time, thus minimizing scheduling costs incurred by worker allocation requests.

Worker-scheduling method in cloud-computing system and apparatus for the same

Disclosed herein are an apparatus and method for setting the allocation rate of a parallel-computing accelerator. The method includes monitoring the utilization rate of the parallel-computing accelerator by an application and setting a start point, at which measurement of utilization data to be used for setting the allocation rate of the parallel-computing accelerator for the application is started, using the result of monitoring the utilization rate; setting an end point, at which the measurement of the utilization data is finished, based on the monitoring result; and setting the allocation rate of the parallel-computing accelerator using the utilization data measured during a time period from the start point to the end point.

Apparatus and method for setting allocation rate of parallel-computing accelerator

An apparatus and method for executing a function. The apparatus includes one or more processors and executable memory for storing at least one program executed by the one or more processors, and the at least one program is configured to determine whether it is possible to reengineer a user function source using interface description language (IDL) code, to generate a reengineered function source by reengineering the user function source, and to execute the reengineered function source.

Apparatus and method for executing function

Disclosed herein is a distributed file system using a torus network. The distributed file system includes multiple servers. The location of a master server may be determined to shorten the latency of data input/output. The location of the master server may be determined such that the distance between the master server and a node farthest away from the master server, among nodes, is minimized. When the location of the master server is determined, the characteristics of the torus network and the features of a propagation transmission scheme may be taken into consideration.

Distributed file system using torus network and method for operating the same

Disclosed herein is a network selecting apparatus including: a determining unit checking an operation state of a cache server in which replicated data corresponding to a data request signal are stored and determining whether the cache server is normally operated, when the data request signal is received from a client; and a selecting unit selecting a first network so that the replicated data are transmitted to input and output devices when the cache server is normally operated and selecting a second network so that original data corresponding to the data request signal are transmitted from a storage server in which the original data are stored to the input and output devices when the cache server is not normally operated.

Network selecting apparatus and operating method thereof

There are provided a system and method for providing a virtual desktop service using a cache server. A system for providing a virtual desktop service according to the invention includes a host server configured to provide a virtual desktop service to a client terminal using a virtual machine, a distributed file system configured to store data for the virtual machine, and a cache server that is provided for each host server group having at least one host server, and performs a read process or a write process of data using physically separate caches when the read process or write process of the data is requested from the virtual machine in the host server.

System and method for providing virtual desktop service using cache server

Disclosed herein is a method and apparatus for supporting virtualization. In the method, conversion of source code of a loadable module is initiated. A virtualization-sensitive instruction is searched for during the conversion of the source code. If the virtualization-sensitive instruction has been found, a virtualization-sensitive instruction table is generated based on the found virtualization-sensitive instruction. The virtualization-sensitive instruction is substituted with an instruction recognizable in a privileged mode, based on the generated virtualization-sensitive instruction table. The loadable module is loaded and executed in a kernel. Accordingly, the present invention supports virtualization, thus minimizing overhead occurring in full virtualization, and guaranteeing the high performance provided by para-virtualization without modifying a source.

Method and apparatus for supporting virtualization of loadable module

Provided are a network scheduler and a network scheduling method capable of effectively managing network bandwidths by selectively supporting a work conserving mode to network entities by using an improved token bucket scheme. The network scheduler selectively supports a work conserving mode to network scheduling units (NSUs) serving as network entities by using a token bucket scheme, such that the network scheduler ensures an allocated network bandwidth or enables the NSUs to use a remaining bandwidth. The network scheduler manages the NSUs by classifying the NSUs into a green state, a red state, a yellow state, and a black state according to a token value, a selection/non-selection of the work conserving mode, and an existence/non-existence of the packet request to be processed.

Network scheduler for selectively supporting work conserving mode and network scheduling method thereof

There is provided a socket compatibility layer for a TOE in a high quality server system. The socket compatibility layer for a TOE provides a standard socket API to an application program and provides binary-level compatibility so that a networking function of a TOE can be used without modifying the conventional socket application program thereby supporting simultaneous use of a TOE and a general Ethernet-based NIC. In a kernel structure of the Linux operation system, the socket compatibility layer for a TOE is located below a BSD socket layer receiving a socket system call from an application program through a standard socket API, is located above an INET socket layer and a TOE driver to control connection between an upper layer and a lower layer, and transmits the socket system call received from the BSD socket layer to the TOE driver or the INET socket layer according to call contents of the socket system call. The socket compatibility layer for a TOE includes a TOE socket generation module, a virtual TOE socket, a TOE STREAM module unit and a TOE DGRAM module unit.

Socket compatibility layer for TOE

The present invention propose a new mechanism, IP check layer which enables to use TOE cards and legacy NICs simultaneously within same protocol family in a Linux or a UNIX computing environment. The IP check layer is inserted between a BSD socket layer and an INET socket layer. IP check layer maintains a routing information and, information of IP addresses of each network interfaces and each socket's bind state. Using this information, IP check layer determines how to process a socket call and which layer (TOE layer, host INET layer) will take over the socket call. By means of the above mechanism, the present invention makes existing socket applications to use TOE cards and legacy NICs at the same time without modification or recompiling.

Growing community of inventors

Daejeon, South Korea

Chei-Yol Kim