• Title, Summary, Keyword: Cell planning

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Analysis on the Cell Capacity and Coverage of 3GPP systems (3GPP 시스템의 용량과 셀 커버리지 분석)

  • 양하영
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.25 no.10A
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    • pp.1461-1472
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    • 2000
  • Recently, the mobile users seem to be rapidly increasing and then the capacity limit will be reached at close hand. In these situations, to provide them with good quality of service in the coming future, newly planned cell design is needed. In the next generation mobile communication systems, namely IMT-2000, good quality services will be possible only by designing the cell structure hierarchically with the help of appropriate cell planning. In the research process, the standardization reports on the future mobile cellular IMT-2000 system (3GPP) are investigated and the parameters, that are essential to cell planning, are also researched. Modeling of IMT-2000 radio link and the numerical analysis on that make it possible to calculate the forward/reverse link budget, system capacity call blocking probability Erlang capacity and cell coverage. In planning the cell of IMT-2000 system, various parameters are considered, such as hierarchical cell structure, number of users, data service forms and propagation area environments. From the results, efficient cell planning methods are proposed. Through this thesis efficient cell planning and maximum capacity will be achieved in the beginning of commercial IMT-2000 service.

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Determination of Optimal Cell Capacity for Initial Cell Planning in Wireless Cellular Networks

  • Hwang, Young-Ha;Noh, Sung-Kee;Kim, Sang-Ha
    • Journal of Information Processing Systems
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    • v.2 no.2
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    • pp.88-94
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    • 2006
  • In wireless cellular networks, previous researches on admission control policies and resource allocation algorithm considered the QoS (Quality of Service) in terms of CDP (Call Dropping Probability) and CBP (Call Blocking Probability). However, since the QoS was considered only within a predetermined cell capacity, the results indicated a serious overload problem of systems not guaranteeing both CDP and CBP constraints, especially in the hotspot cell. That is why a close interrelationship between CDP, CBP and cell capacity exists. Thus, it is indispensable to consider optimal cell capacity guaranteeing multiple QoS (CDP and CBP) at the time of initial cell planning for networks deployment. In this paper, we will suggest a distributed determination scheme of optimal cell capacity guaranteeing both CDP and CBP from a long-term perspective for initial cell planning. The cell-provisioning scheme is performed by using both the two-dimensional continuous-time Markov chain and an iterative method called the Gauss-Seidel method. Finally, numerical and simulation results will demonstrate that our scheme successfully determines an optimal cell capacity guaranteeing both CDP and CBP constraints for initial cell planning.

An integrated framwork for a cellular manufacturing system (셀 생산 시스템의 통합 구조)

  • 이노성;임춘우
    • 제어로봇시스템학회:학술대회논문집
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    • pp.89-92
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    • 1997
  • The objective of this paper is to provide an alternative framework for the integration of process planning and scheduling in cellular manufacturing. The concept of an integrated cellular manufacturing system is defined and the system architecture is presented. In an integrated cellular manufacturing system, there are three modules : the process planning module, the manufacturing-cell design module, and the cell-scheduling module. For each module, the tasks and their activities are explained.

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Implementation of 3D GIS technology for Cell Planning System (무선망 설계 시스템에서의 3D GIS 분석 기술 구현)

  • Jeong, Mi-Young;Jung, Hyun-Meen
    • Proceedings of the IEEK Conference
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    • pp.751-752
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    • 2008
  • This paper introduces current technology trend of cell planning system in radio propagation and 3D GIS technologies which are implemented in Cell planning system "CellTREK" for accurate radio propagation analysis. It includes managing of DTM(Digital Terrain Model) data considering building height used by 3D propagation analysis module, and navigation module based on DirectX technology to estimate and eliminate the shadowing area by high rise buildings.

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A Study on RFID Cell Planning Schemes for Indoor Location-awareness (실내 위치 인식을 고려한 RFID 기반 셀 구성 방안에 관한 연구)

  • Kim, Taehoon;Tak, Sungwoo
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.17 no.9
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    • pp.2191-2198
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    • 2013
  • This paper proposes a RFID cell planning scheme for indoor location-awareness. We theoretically develop four objective functions that yield objective goals significant to the optimal design of a RFID cell topology and simulation is conducted to evaluate the performance of the proposed RFID cell planning scheme. We also evaluate the performance of the proposed technique after practically installing RFID readers in an indoor space to configure a RFID cell topology. Performance evaluations are conducted in terms of the following objective goals: minimal number of RFID readers for configuring a RFID cell topology, maximal RFID cell coverage areas for indoor location-awareness, minimal overlapping cells, and maximal indoor location-awareness accuracy.

Analysis of effects on cell planning of IS-95A CDMA network by soft/softer handoff (Upbanded IS-95A CDMA 망에서 Soft/Softer handoff가 망설게에 미치는 영향분석)

  • 최홍석;노종선;박판종
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.23 no.9A
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    • pp.2221-2229
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    • 1998
  • Handoff is an important parameter for system performance and capacity analysis in CDMA cell planning. In this paper, simulation tool for analyzing the effects of soft handoff on cell planning of CDMA network is developed by studying propagation model in 1.9GHz frequency specrum, soft hadnoff algorithm given by IS-95, and several parameters for CDMA cell planning. By using the tool, soft handoff gain and effects of soft handoff on cDMA system performance and capacity are analyzed. Research results and simulation tool developed in this paper can be used for optimal CDMA cell planning for PCS and IMT-2000 in 1.9GHz frequency spectrum such as locating base station and parameter optimization.

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Analyzing the Determinants of the Patent Quality in Fuel Cell and Solar Cell Technology Using Count Data Models (가산자료 회귀모형을 활용한 연료전지 및 태양전지 분야 특허의 질적 수준 결정요인 분석)

  • Park, Jung-Kyu;Heo, Eunn-Yeong
    • Journal of Korea Technology Innovation Society
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    • v.13 no.2
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    • pp.365-378
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    • 2010
  • For sustainable economic growth, the Korea government continues to increase its investment in R&D and at the same time, have reinforced the management of R&D outcomes and enlargement of its infrastructure for utilization. However, a strategic R&D planning that draws an outstanding outcomes is more important than the management of its post-outcomes. The purpose of this study is to propose an implication on the policy of R&D planning for obtaining a good R&D outcomes such as a high quality patent. We compared and analyzed the determinants of the patent quality in fuel cell and solar cell technology using the count data models. Estimated results showed that the determinants of the patent quality in technologies were different from each other. Therefore, having appropriate R&D planning strategies for all technologies was more effective than applying one same strategy for all because of technological differences, and based on the estimated results, we suggested the R&D planning strategy in fuel cell and solar cell technologies that could in result in high R&D outcomes.

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Frequency Planning and Interference Rejection with Co-Channel Dual-Polarization Technique in B-WLL Applications (코채널 이중편파 기술을 적용한 B-WLL 의 주파수 배치 및 채널간섭 제거기에 대한 연구)

  • 이재원;서경환;정한욱
    • Proceedings of the IEEK Conference
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    • pp.821-824
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    • 1999
  • In this article, as a way of pursuing high spectral efficiency and flexible cell planning, co-channel dual-polarization techniques are suggested for B-WLL applications. It provides a double down stream capacity compared with conventional scheme and also makes some flexibility in cell planning. In order to implement co-channel B-WLL system, some frequency plans, interference cancellation methods, and system block diagrams are presented here.

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Performance comparison of Tabu search and genetic algorithm for cell planning of 5G cellular network (5G 이동통신 셀 설계를 위한 타부 탐색과 유전 알고리즘의 성능)

  • Kwon, Ohyun;Ahn, Heungseop;Choi, Seungwon
    • Journal of Korea Society of Digital Industry and Information Management
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    • v.13 no.3
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    • pp.65-73
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    • 2017
  • The fifth generation(5G) of wireless networks will connect not only smart phone but also unimaginable things. Therefore, 5G cellular network is facing the soaring traffic demand of numerous user devices. To solve this problem, a huge amount of 5G base stations will need to be installed. The base station positioning problem is an NP-hard problem that does not know how long it will take to solve the problem. Because, it can not find an answer other than to check the number of all cases. In this paper, to solve the NP hard problem, we compare the tabu search and the genetic algorithm using real maps for optimal cell planning. We also perform Monte Carlo simulations to study the performance of the Tabu search and Genetic algorithm for 5G cell planning. As a results, Tabu search required 2.95 times less computation time than Genetic algorithm and showed accuracy difference of 2dBm.

Tabu Search based Optimization Algorithm for Reporting Cell Planning in Mobile Communication (이동통신에서 리포팅 셀 계획을 위한 타부서치 기반 최적화 알고리즘)

  • Jang, Kil-woong
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.24 no.9
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    • pp.1193-1201
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    • 2020
  • Cell planning, which determines the cell structure for location management of mobile terminals in mobile communications, has been dealt with as an important research task to determine network performance. Among the factors influencing the cell structure planning in mobile communication, the signal cost for location management plays the most important role. In this paper, we propose an optimization algorithm that minimizes the location management cost of all the cells used to plan the cell structure in the network with reporting cell structure in mobile communication. The proposed algorithm uses a Tabu search algorithm, which is a meta-heuristic algorithm, and the proposed algorithm proposes a new neighborhood generation method to obtain a result close to the optimal solution. In order to evaluate the performance of the proposed algorithm, the simulation was performed in terms of location management cost and algorithm execution time. The evaluation results show that the proposed algorithm outperforms the existing genetic algorithm and simulated annealing.