• Title/Summary/Keyword: 매크로 셀

Search Result 112, Processing Time 0.023 seconds

Hybrid ABS based Inter-Cell Scheduling Algorithms for QoS Improvement of Heterogeneous Networks (이기종 네트워크의 QoS 향상을 위한 Hybrid ABS기반 셀 간 스케줄링 알고리즘)

  • Kim, Myung-Dong;Seong, Hyeon-Kyeong
    • Journal of the Institute of Convergence Signal Processing
    • /
    • v.17 no.1
    • /
    • pp.1-9
    • /
    • 2016
  • In this paper, for the improvement of quality of service(QoS) performance of heterogeneous networks, multi-cell scheduling is proposed. In order to implement the proposed algorithm, for the recognition of the impact on the throughput performance of users, macro-pico-cells that form distributed architecture were proposed. In operating heterogeneous networks, considering the centralized structure, a macro-RRH(Remote Radio Head) deployment scenario was proposed. For interference mitigation of the proposed system, by applying the optional sub-frame, through CQI(Channel Quality Indicator) measurement for each sub-frame period, constraint conditions were measured according to system situations. For the simplification, the pattern of the same ABS muting was assumed. In the above two multi-cell environments, the algorithm of high-speed load balancing maintenance was proposed.

Performance Analysis of DS/CDMA Hierarchical Cellular System on Shadowing and Imperfect Power Control (전파음영과 불완전 전력제어를 고려한 DS/CDMA 계층 셀룰라 시스템의 성능 분석)

  • 윤석재;김항래
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.12 no.7
    • /
    • pp.1037-1047
    • /
    • 2001
  • In this paper, the capacity for the reverse link of the imperfect power controlled DS/CDMA hierarchical cellular system is analyzed considering imperfect sectorization in shadowing environment. Unlike the theoretical assumption, the power control of the DS/CDMA hierarchical cellular system is not perfect. Therefore, we consider various parameters such as the imperfect power control, the imperfect sectorization, the processing gain and the number of microcell interferers, which cause the capacity variation of the DS/CDMA hierarchical cellular system. It is shown that the capacity of DS/CDMA hierarchical cellular system is decreased according to the increase of the deviation of the imperfect power control, the overlapped angle, the power ratio between macrocell and microcell and to the decrease of processing gain, the number of microcell interfering users. Also, it is observed that the hierarchical cellular system can increase the user capacity from 1.54 to 3.89 times compared to the homogeneous macro-cellular system.

  • PDF

Simulation Model of Mobile Communication Systems with Hierarchical Cell Structure (이동 통신 시스템의 계층 셀 구조를 위한 시뮬레이션 모델)

  • 김기완;김태훈;김두용;최덕규
    • Proceedings of the Korean Information Science Society Conference
    • /
    • 1998.10a
    • /
    • pp.214-216
    • /
    • 1998
  • 이동 통신 시스템에서는 더 많은 사용자의 수요와 서비스의 질을 향상시키기 위하여 마이크로셀을 포함하는 매크로셀의 계층구조가 설계되고 있다. 그러나 계층 셀 구조를 이용하여 서로 다른 이동 성질을 갖는 사용자를 서비스 할 수 있다. 본 논문에서는 이와 같은 계층 셀 구조의 이동 통신 시스템의 성능을 분석하기 위해 큐잉네트워크 모델을 이용한 시뮬레이션모델을 제안한다. 제안된 모델을 트래픽의 변화에 따른 계층 셀 구조 할당 방식의 연구에 적용될 수 있을 것이다.

  • PDF

Performance Evaluation of Mobile Communication System with Multi-layer Cell Structure (다층 셀 구조를 갖는 이동 통신 시스템의 성능 평가)

  • 김기완
    • Proceedings of the Korea Society for Simulation Conference
    • /
    • 1998.03a
    • /
    • pp.17-20
    • /
    • 1998
  • 현재 늘어나는 개인 이동 통신 수요를 만족시키기 위하여 시스템의 용량 증가가 필요하다. 서로 다른 이동성을 갖는 사용자에 대한 서비스를 위해 매크로 셀 내에 마이크로 셀들로 이루어진 다층 셀구조가 제안되고 있다. 본 논문에서는 급증하는 이동 통신 수요를 만족시키기 위한 다층 셀 구조를 갖는 이동 통신 시스템의 성능 분석을 위해 큐잉 네트워크 모델을 이용한 해석적 분석 방법을 제안하고 컴퓨터 시뮬레이션을 이용하여 제안된 해석적 방법의 유효성을 검증한다. 제안된 해석적 방법은 수학적 분석 결과를 얻는데 상당한 용이성을 제공하고, 더 나아가 다층 셀 구조의 채널 할당 방식에 대한 시스템의 성능분석을 위해 사용될 수 있을 것이다.

  • PDF

Resource Allocation and Handoff for Mobile Multimedia Service (모바일 멀티미디어 서비스를 위한 자원 할당 및 핸드오프)

  • Lee, Gi-Sung
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.11 no.12
    • /
    • pp.5029-5035
    • /
    • 2010
  • This paper proposes a scheme to maximize traffic capacity for supporting mobile multimedia services. For a handoff session, we suggest a novel resource reservation scheme to adjust the number of reserved resources in macrocell, depending on the number of saturated microcells. The proposed schemes are able to accommodate much more mobile sessions in the microcell and significantly reduce the blocking probability in the macrocell at the expense of the small increment of a forced termination in the microcell. Therefore, our system is more flexible to the increase of traffic in macrocell.

A New Cell Selection Scheme For Heterogeneous Mobile Communication Networks (이종 이동통신 네트워크를 위한 새로운 셀 선택 기법)

  • Ban, Tae-Won;Jung, Bang Chul;Jo, Jung-Yeon;Sung, Kil-Young
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.18 no.10
    • /
    • pp.2397-2402
    • /
    • 2014
  • Recently, heterogeneous mobile communication network is attracting plenty of interest to serve explosively increasing mobile data traffic. Although the heterogeneous mobile communication network can enhance spatial reuse ratio by using both conventional macro cells and small cells simultaneously, it causes the unbalance in performance of downlink and uplink. In this paper, we propose a new cell selection scheme for heterogeneous mobile communication network. In the proposed cell selection scheme, mobiles select their home cells by considering both uplink and downlink performance, contrary to conventional schemes. We analyze the performance of the proposed scheme in terms of average cell transmission rate through system level simulations and compare it with those of conventional schemes.

An Adaptive Cell Selection Scheme for Ultra Dense Heterogeneous Mobile Communication Networks (초밀집 이종 이동 통신망을 위한 적응형 셀 선택 기법)

  • Jo, Jung-Yeon;Ban, Tae-Won;Jung, Bang Chul
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.19 no.6
    • /
    • pp.1307-1312
    • /
    • 2015
  • As smart-phones become popular, mobile data traffic has been dramatically increasing and intensive researches on the next-generation mobile communication network is in progress to meet the increasing demand for mobile data traffic. In particular, heterogeneous network (HetNet) is attracting much interest because it can significantly enhance the network capacity by increasing the spatial reuse with macro and small cells. In the HetNet, we have several problems such as load imbalance and interference because of the difference in transmit power between macro and small cells and cell range expansion (CRE) can mitigate the problems. In this paper, we propose a new cell selection scheme with adaptive cell range expansion bias (CREB) for ultra dense HetNet and we analyze the performance of the proposed scheme in terms of average cell transmission rate through system-level simulations and compare it with those of other schemes.

3GPP Standardization Activity for Small Cell Enhancement (3GPP 소형셀 향상 표준화 기술 동향)

  • Baek, SeungKwon;Chang, SungCheol
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
    • /
    • 2014.10a
    • /
    • pp.628-631
    • /
    • 2014
  • Recently, the proliferation of new applications, e.g., mobile TV, Internet gaming, large file transfer, and the various of user terminals, e.g., smart phones and notebooks, has dramatically increased user traffic and network load. In order to meet this traffic growth, vendors and cellular operators are working on the development of new technologies and cellular standards. Within them, small cell deployment has been heralded as one of most promising way to increase both coverage and capacity of future cellular network. Small cell technology enables to improve capacity of cellular radio network by tight cooperation between small cell and macro cell in multi-tier network where small cells are densely deployed within macro cell coverage. In this paper, we describe the deployment scenarios for cooperation between macro cell and small cells and state-of-the-art technologies related to dense small cell deployment. Then, we also provide design principles and standardization trends for small cell enhancement in 3GPP.

  • PDF

Adaptive Frequency Resource Allocation For FFR Based Femtocell Network Environment (FFR 기반의 Femtocell 네트워크를 위한 적응 주파수 자원 할당 방법)

  • Bae, Won-Geon;Kim, Jeong-Gon
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.37 no.7B
    • /
    • pp.505-516
    • /
    • 2012
  • According to distribute of resource of macro cell and reduce distance between transmitter and receiver, Femto cell system is promising to provide costeffective strategy for high data traffic and high spectral efficient services in future wireless cellular system environment. However, the co-channel operation with existing Macro networks occurs some severe interference between Macro and Femto cells. Hence, the interference cancellation or management schemes are imperative between Macro and Femto cells in order to avoid the decrease of total cell throughput. First, we briefly investigate the conventional resource allocation and interference cancellation scheme between Macro and Femto cells. So we found that cell throughput and frequency reuse ware decreased Then, we propose an adaptive resource allocation scheme based on the distribution of Femtocell traffic in order to increase the cell throughput and also maximize the spectral efficiency over the FFR (Fractional Frequency Reuse) based conventional resource allocation schemes. Simulation Results show that the proposed scheme attains a bit similar SINR (Signal to Interference Noise Ratio) distribution but achieves much higher total cell throughput performance distribution over the conventional resource allocation schemes for FFR and future IEEE 802.16m based Femtocell network environment.

Design and Performance Analysis of Bandwidth-Efficient Handoff Scheme in Proxy Mobile IPv6 Networks (프록시 모바일 IPv6 네트워크에서 대역폭에 효율적인 핸드오프 기법의 설계 및 성능 분석)

  • Yoo, Seung-Beak;Jeong, Jongpil
    • The Journal of the Institute of Internet, Broadcasting and Communication
    • /
    • v.14 no.1
    • /
    • pp.219-236
    • /
    • 2014
  • In this paper, we propose a novel Proxy Mobile IPv6 network bandwidth-efficient handoff scheme. MN are classified into slow and fast one. At first MN should be registered in the microcell for bandwidth efficient handoff scheme. microcell is overlapped to handle the overflow session request which is nested. Overflow session request in macrocell requests to go back from the boundary of the microcell to new microcell. If idle session traffic is in a cell, it is requested by the target microcell. Analysis model was developed, an existing session of the session blocking probability and forcing termination probability of the session request have improved considerably. If the total traffic load of the system is not very large, the proposed scheme has the best bandwidth efficiency and provides better quality of service (QoS) to MN without costs of a lot of processing on the system.