• Title/Summary/Keyword: 자원 재할당

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A Resource Reallocation Scheme Enhancing the Survivability of Essential Services (필수 서비스 생존성 향상을 위한 자원 재할당 기법)

  • Kim, Sung-Ki;Min, Byoung-Joon;Choi, Joong-Sup;Kim, Hong-Geun
    • The KIPS Transactions:PartC
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    • v.10C no.1
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    • pp.95-102
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    • 2003
  • In order to guarantee the survivability of essential services against attacks based on new methodology, we need a solution to recognize important resources for the services and to adapt the urgent situation properly. In this paper, we present a dynamic resource reallocation scheme which is one of the core technologies for the construction of intrusion tolerant systems. By means of resource reallocation within a host, this scheme enables selected essential services to survive even after the occurrence if a system attack. Experimental result obtained on a test-bed reveals the validity of the proposed scheme for resource reallocation. This scheme may work together with IDS (Intrusion Detection System) to produce more effective responsive mechanisms against attacks.

A Radio Resource Allocation Scheme for Improving Cell Throughput in Device-to-Device Communication Multiply Reusing Resources of Cellular Networks (이동통신망의 자원을 다중 재사용하는 D2D 통신에서 셀 수율 향상을 위한 무선자원 할당기법)

  • Lee, Jungha;Gu, Jaheon;Chung, Min Young
    • Annual Conference of KIPS
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    • 2012.11a
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    • pp.712-714
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    • 2012
  • D2D(Device-to-Device) 통신은 이동통신망을 기반으로 동작할 경우 이동통신망의 자원을 재사용함으로써 주파수 자원사용의 효율성을 높일 수 있다. 그러나 D2D 통신 단말(DUE; D2D user equipment)이 이동통신망의 자원을 재사용하는 경우 동일자원을 사용하는 이동통신개체와 DUE 간 및 D2D 통신 쌍 간에 신호 간섭이 발생할 수 있어 이를 고려한 자원할당기법에 대한 연구가 필요하다. 본 논문에서는 다수의 DUE가 이동통신망의 상향링크 자원을 다중으로 재사용할 때 이동통신개체 및 DUE가 달성가능 한 주파수 효율을 고려하여 DUE에게 자원을 할당함으로써 셀 수율을 향상시킬 수 있는 자원할당 기법을 제안한다.

Resource Reallocation for the Protection of Essential Services (필수 서비스 보호를 위한 자원 재할당)

  • 민병준;김성기;최중섭;김홍근
    • Journal of KIISE:Computer Systems and Theory
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    • v.30 no.12
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    • pp.714-723
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    • 2003
  • In order to guarantee system survivability against attacks based on new methodology, we need a solution to recognize important resources for essential services and to adapt the urgent situation properly. In this paper, we present a dynamic resource reallocation scheme which is one of the core technologies for the implementation of intrusion tolerant systems. By means of resource reallocation within a node, this scheme enables the essential services to survive even after the occurrence of a system attack. If the settlement does not work within the node, resource reallocation among nodes takes places, thus the essential services are transferred to another prepared server node. Experimental result obtained on a testbed reveals the validity of the proposed scheme for resource reallocation. This scheme may work together with IDS(Intrusion Detection System) to produce effective responsive mechanism against attacks.

A Resource Allocation Scheme for D2D communication Reusing Uplink Resource of Cellular Networks (이동통신망의 상향링크자원을 재사용하는 D2D 통신을 위한 자원할당기법)

  • Lee, Jungha;Bae, Sueng Jae;Chung, Min Young
    • Annual Conference of KIPS
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    • 2012.04a
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    • pp.597-599
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    • 2012
  • D2D(Device-to-Device) 통신은 이동통신망을 기반으로 동작할 경우 이동통신망의 자원을 재사용함으로써 자원이용의 효율성을 높일 수 있다. 그러나 동일자원을 사용하는 이동통신개체와 D2D 통신 단말(DUE) 사이에 신호 간섭이 발생할 수 있어 이를 고려한 자원할당기법에 대한 연구가 필요하다. 본 논문에서는 D2D 통신이 이동통신망의 상향링크자원을 재사용할 때 DUE로부터 기지국으로의 간섭으로 인한 CUE의 상향링크 전송률 손실 대비 DUE로 얻는 전송률 이득이 극대화하는 DUE에게 자원을 할당함으로써 동일자원을 사용하는 DUE와 이동통신개체 간 간섭을 완화하고 망의 수율 성능을 향상시킬 수 있는 자원할당기법을 제안한다.

Performance Analysis of Fractional Frequency Reuse Scheme for Enterprise Femtocell Networks (기업형 펨토셀 네트워크에서 부분 주파수 재사용 방법의 성능분석)

  • Kim, Se-Jin
    • Journal of Internet Computing and Services
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    • v.19 no.1
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    • pp.11-17
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    • 2018
  • In this paper, we propose a novel frequency reuse method using the fractional frequency reuse (FFR) for enterprise femtocell networks (EFNs) in which a lot of femtocell base stations (fBSs) are deployed in a buinding, e.g., business companies, department stores, etc, and evaluate the system performance for the downlink of EFNs. First, we introduce the concept of the split reuse method to allocate the frequency bandwidth with considering the interference between the macrocell and femtocell. Then, we propose the resource allocation with the FFR for fBSs of EFNs to reduce the interference and increase the system capacity. Through simulations, we show that the proposed FFR method outperforms a traditional resource allocation method with frequency reuse factor 4 in terms of the mean fUE capacity, total EFN capacity, and outage probability.

An Adaptive Resource Allocation Scheme based on Renegotiation for QoS Provisioning in Wireless Mobile Netwerks (무선 이동 통신망에서 QoS 제공을 위한 재할당 기반의 적응적인 자원 할당 기법)

  • Hong, Jung-Pyo;Kim, Hwa-Sung
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.29 no.9A
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    • pp.1067-1074
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    • 2004
  • In the wireless mobile networks, it IS important to provide the quality-of-service (QoS) guarantees as they are increasingly expected to support the multimedia applications Although the QoS provisioning problem arises in the wire-line networks as well, the mobility of hosts and the scarcity of bandwidth make QoS provisioning a challenging task in wireless mobile networks. The resource allocation to multimedia applications of varying QoS reqUlrement 15 a complex issue. In this paper, we propose a new adaptive resource allocation scheme based on the concept of the resource reservation and the renegotiation in order to guarantee the QoS of the real-tune traffic. The proposed scheme is aimed at improving the perfonnance in terms of the new call blocking rate, the bandoff dropping rate, and the bandwIdth utilization.

FFFR-Based Resource Allocation Mechanism for Interference Mitigation of D2D Communications in LTE-Advanced Networks (LTE-Advanced 네트워크에서 간섭 완화를 위한 FFFR 기반의 D2D 자원 할당 기법)

  • Na, Lee Han;Kim, Hyang-Mi;Kim, SangKyung
    • KIPS Transactions on Computer and Communication Systems
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    • v.4 no.1
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    • pp.5-10
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    • 2015
  • D2D (Device-to-Device) communication underlaying LTE-advanced networks is a promising technology to improve the system capacity and spectral efficiency. By sharing the same radio resources with cellular user equipments, D2D communications can significantly enhance the overall spectral efficiency. However, it may cause interference between D2D link and cellular link. Careful resource allocation and interference coordination between cellular and D2D communications are very important and need to be properly handled. This paper proposes a radio resource allocation scheme based on FFFR (Flexible Fractional Frequency Reuse) for D2D communication underlaying cellular networks. The base station selects randomly resource blocks assigned to cellular users, and reuses them for a D2D pair. Through simulations, we have confirmed that the proposed scheme improves the system throughput, reduces the computational complexity, and mitigates the interference of D2D link and cellular link.

A study on Resource Allocation for Service Load Balancing in the XenServer-based Virtual Environment (XenServer 기반 가상화 환경에서 서비스 부하분산을 위한 자원할당 방안 연구)

  • Oh, Soo-Jeong;Nkosi, Domingos;Park, Chul-Geun;Kim, Sung-Ki
    • Annual Conference of KIPS
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    • 2014.11a
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    • pp.257-258
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    • 2014
  • 클라우드 가상화 환경에서 물리서버 노드 단위의 자원할당이 정적 로드밸런싱에 기반을 두고 있어 서비스 요청에 대한 효과적인 자원 할당의 문제가 대두되고 있다. 본 논문에서는 XenServer 기반 가상화 환경에서의 물리서버의 자원 사용량과 사용자 요청 트래픽을 모니터링하여, 동적 자원재할당하는 방안을 제시한다.

Improvement of Computational Complexity of Device-to-Device (D2D) Resource Allocation Algorithm in LTE-Advanced Networks (LTE-Advanced 환경에서 D2D 자원 할당 알고리즘의 계산 복잡도 개선)

  • Lee, Han Na;Kim, Hyang-Mi;Kim, SangKyung
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.40 no.4
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    • pp.762-768
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    • 2015
  • D2D communication as an underlaying LTE-Advanced network has proven to be efficient in improving the network performance and decreasing the traffic load of eNodeB(enhanced NodeB). However large amount of interference can be caused by sharing the resources between the cellular users and D2D pairs. So, a resource allocation for D2D communication to coordinate the interference is necessary. Related works for resource allocation that D2D can reuse the resources of more than one cellular user with best CQI(Channel Quality Indicator) have been proposed. D2D communications may still cause interference to the primary cellular network when radio resource are shared between them. To avoid this problem, we propose a radio resource allocation algorithm with low computational complexity for D2D communication in OFDM-based wireless cellular networks. Unlike the previous works, the proposed algorithm utilizes unused ones of the whole resource. The unused resource allocate to on D2D pair can be shared only with other D2D pairs. In other words, if the distance between the D2D pairs is sufficient, we allowed more than two D2D pairs to share the same resources. The simulation results have proven that the proposed algorithm has up to 11 times lower computational complexity than the compared one according to the number of D2D.

A Fast Resource Reallocation Protocol (FRRP) for rt-VBR MPEG-2 video services over ATM Networks (ATM 상에서 실시간 가변비트율 MPEG-2 동영상 서비스를 위한 고속 자원 재할당 프로토콜)

  • 홍승은;장경훈;김덕진;고성제
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.24 no.8B
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    • pp.1426-1437
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    • 1999
  • The introduction of fast packet switching networks such as the ATM leads to the possibility of video services with constant quality. However, the fixed traffic descriptor(TD), which is defined by ATM Forum and ITU-T, can not simultaneously satisfy network efficiency and video quality. This paper presents fast resource reallocation protocol (FRRP) which can provide an effective compromise between network efficiency and video quality. This protocol reallocates the network resources and then adapts the traffic to the reallocated resources. In the proposed method, a video session is divided into several time-intervals according to its generated traffic and TD is calculated which well characterizes the traffic during the specific subdivided interval. In addition, a system model, where MPEG coding algorithm and network control are unified, is proposal and the performance of the FRRP in terms of cell loss rate(CLR) is evaluated though the simulation using real video traffic(Star Wars). Simulation results show that the FRRP has only 5 ~35% CLR of the fixed TD.

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