• 한국컴퓨터정보학회논문지
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• 제27권9호
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• pp.101-112
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• 2022

본 논문에서는 5G 네트워크 슬라이싱에 대해서 분석하고 5G 이동 통신망에서의 효율적인 네트워크 슬라이스 설정 방안을 제안한다. 5G 이동 통신망에서 네트워크 슬라이싱은 네트워크 슬라이스 인스턴스 정보에 기반하여 구분되고 수행된다. 단말과 네트워크 간의 네트워크 슬라이스 인스턴스 정보가 상호 일치하지 않는 경우, 단말의 PDU 세션 연결 요청 실패에 따른 불필요한 시그널링 오버헤드가 발생한다. 본 논문은 이러한 문제를 해결하기 위해서, 두 가지 효율적인 네트워크 슬라이스 설정 기법, 단말 기반 ENSC(Efficient Network Slice Configuration) 기법과 네트워크 기반 ENSC 기법을 제안한다. 제안하는 두 가지 기법들은 신속한 단말과 네트워크 간의 최신 변경 업데이트된 네트워크 슬라이스 정보를 제공 설정 수행하게 되어, 기존 방안과 비교하여 배터리 리소스 효율성을 향상시키고 불필요한 시그널링 오버헤드를 최소화할 수 있다.

• Journal of information and communication convergence engineering
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• 제17권3호
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• pp.185-190
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• 2019

The explosive growth of data traffic and services has created cost challenges for networks. Studies have attempted to effectively apply network slicing in fifth generation networks to provide high speed, low latency, and various compatible services. However, in network slicing using mixed-integer linear programming, the operation count increases exponentially with the number of physical servers and virtual network functions (VNFs) to be allocated. Therefore, we propose an efficient slice allocation method based on cluster technology, comprising the following three steps: i) clustering physical servers; ii) selecting an appropriate cluster to allocate a VNF; iii) selecting an appropriate physical server for VNF allocation. Solver runtimes of the existing and proposed methods are compared, under similar settings, with respect to intra-slice isolation. The results show that solver runtime decreases, by approximately 30% on average, with an increase in the number of physical servers within the cluster in the presence of intra-slice isolation.

• KNOM Review
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• 제21권2호
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• pp.35-45
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• 2018

네트워크 슬라이싱 기능이 모바일 네트워킹에 적용되면서 네트워크 슬라이스를 선택할 수 있는 메커니즘이 필수적이다. 5G 아키텍처에 대한 3GPP 표준 기술 사양에 따라 슬라이스 선택 프로세스를 활용하기 위해 Network Slice Selection Function (NSSF)가 포함되어 있다. 이 네트워크 기능의 실제 구현은 네트워크 인스턴스의 동적 변경 사항을 처리해야하므로 가상 네트워크 기능 (VNF)의 오케스트레이션을 지원하는 플랫폼이 필요하다. 제안 된 솔루션은 Central Office Rearchitected as a Data Center (CORD) 플랫폼에서 모바일 네트워크용으로 특화된 M-CORD를 사용하고 있다. 이는 서비스 오케스트레이터인 XoS를 통합하는 플랫폼 및 Software Defined Networking (SDN), Network Function Virtualization (NFV) 및 클라우드를 관리하는 OpenStack에 기반하고 있다. 이 플랫폼을 통해, 본 논문에서 제시된 NSSF 구현은 백엔드 서비스와 네트워크 기능 인스턴스 간의 동기화를 통해서 동적으로 슬라이스 정보를 얻을 수 있는 적절한 생태계를 제공하고 있다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2004년도 추계학술대회 논문집
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• pp.1221-1224
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• 2004

In this study, we developed a method classifying slice shot during golf practice using backpropagation algorithm. The 144 data based on the backpropagation model(11 inputs, 2 outputs) was used as a learning set and the model was verified based on the extra 50 data in the process to predict a slice shot in golf swing. The results showed 100％ separating rate of learning set and 91.5％ separating rate of verified set. The developed method can be potentially beneficial for the predicting of slice shot in an indoor golf excercise setting without applying any additional equipment.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 ITC-CSCC -2
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• pp.802-805
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• 2002

In the three-dimensional domain image expressed with two-dimensional slice images, such as fMRI images and multi-slice CT images, we propose the three-dimensional domain automatic segmentation for the purpose of extracting region. In this paper, we segmented each domain from the fMRI images of the head of people and monkey. We used the neural network "Pulse-Coupled Neural Network" which is one of the models of visual cortex of the brain based on the knowledge from neurophysiology as the technique. By using this technique, we can segment the region without any learning. Then, we reported the result of division of each domain and extraction to the fMRI slice images of human's head using "three-dimensional Pulse-Coupled Neural Network" which is arranged and created the neuron in the shape of a three-dimensional lattice.

• Annals of Clinical Neurophysiology
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• 제1권2호
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• pp.147-153
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• 1999

Hippocampal slice models can be a powerful tool to study the mechanism of partial epilepsy. Despite the loss of connection with the rest of the brain, in vitro hippocampal slice preparations allow detailed physiological and pharmacological studies, which would be impossible, in vivo. There are several methods to induce electrographic seizures on hippocampal slice models. Those are electrical pulse train stimulation, 0 $Mg^{2+}$ artificial cerebrational fluid and high concentration of extracelluar $K^+$ on bath. Among them, the electrically triggered seizure may mimic the physiological communication between neuronal populations without any deterioration of normal physiologic and chemical status of the hippocampal slice models. Presumably, such communication from hyperexcitable areas to other neuronal populations is involved in the development of epilepsy. Electrographic seizures in hippocampal slice models occur in the network of neurons that are involved in epileptic seizures in the hippocampus in vivo. Because these models have many advantages and are very valuable to research of epileptogenesis on partial epilepsy, I would like to introduce the electrophysiological methods to induce electrographic seizure or epilepsy on hippocampal slice models briefly in this paper.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1997년도 춘계학술대회 논문집
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• pp.321-326
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• 1997

This paper present how VRML file format can be used for RP Technology. VRML standards provids compact and powerful interface between remote RP manufacturer in network independent environment. We have constructed integrated and network-connected server system which can share the CAD data and varios process which is STL-to-VRML translater,slicing process,slice anchor process etc. This Server system consisted in file converter between STL and VRML,CGI system which sends a generated data to VRML client or browser, slice-generator which can re-slice at varied thickness and simulator which can show and check simultaneously status between near slices with support. This system aims to the integrated simulator which supports graphic animator and FEA analysis system.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제17권3호
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• pp.794-815
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• 2023

The rapid development of mobile communication not only has made the industry gradually diversified, but also has enhanced the service quality requirements of users. In this regard, it is imperative to consider jointly network slicing and mobile edge computing. The former mainly ensures the requirements of varied vertical services preferably, and the latter solves the conflict between the user's own energy and harsh latency. At present, the integration of the two faces many challenges and need to carry out at different levels. The main target of the paper is to minimize the energy consumption of the system, and introduce a multi-slice joint task offloading and resource allocation scheme for massive multiple input multiple output enabled heterogeneous networks. The problem is formulated by collaborative optimizing offloading ratios, user association, transmission power and resource slicing, while being limited by the dissimilar latency and rate of multi-slice. To solve it, assign the optimal problem to two sub-problems of offloading decision and resource allocation, then solve them separately by exploiting the alternative optimization technique and Karush-Kuhn-Tucker conditions. Finally, a novel slices task offloading and resource allocation algorithm is proposed to get the offloading and resource allocation strategies. Numerous simulation results manifest that the proposed scheme has certain feasibility and effectiveness, and its performance is better than the other baseline scheme.

• Journal of the Optical Society of Korea
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• 제19권4호
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• pp.340-345
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• 2015

The Internet traffic is forecasted to grow at a compound annual rate of 21 % from 2013 to 2018, according to surveys carried out by Cisco [1]. Network resources are significantly over-provisioned in today's networks, and it is quite common to see link utilization in the 30-40% range [2]. Additionally, the multi-media services have widely divergent bandwidth and Quality of Experience (QoE) requirements. Unfortunately, the huge transmission capacity will increase the power consumption of network equipment [3]. Applications Coordinated with Transport, Internet Protocol and Optical Networks (ACTION) [4] has been proposed to realize a multi-QoE, application-centric, and highly energy-efficient network that leverages flexible elastic optical network technologies [5-7]. This paper provides key network technologies for realizing the ACTION, which are a virtual optical slice core network and a Time Division Multiplexing (TDM)-based deterministic active optical access network.

• 한국경영과학회지
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• 제7권2호
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• pp.5-29
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• 1982

This paper presents the network models for general dynamic conveyor systems which are characterized by transporting and storing materials between work stations over time. With an appropriate choice of time-slice the conveyor system can be represented exactly as a dynamic flow network which can be solved by an efficient pure network algorithm.