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  • 確率モデルを用いた東京国際空港における到着機制御に関する研究

    北詰 有人 , 田村 恵一 , 宮沢 与和

    … A stochastic model presenting the queueing mechanism of the procedure is constructed. … Parameters in the model are derived from real traffic data. …

    航空宇宙技術 17(0), 11-17, 2018


  • Performance Analysis of IEEE 802.11 DCF Based on a Macroscopic State Description

    LI Xiang , NARITA Yuki , GOTOH Yuta , SHIODA Shigeo

    … <p>We propose an analytical model for IEEE 802.11 wireless local area networks (WLANs). … The analytical model uses macroscopic descriptions of the distributed coordination function (DCF): the backoff process is described by a few macroscopic states (medium-idle, transmission, and medium-busy), which obviates the need to track the specific backoff counter/backoff stages. …

    IEICE Transactions on Communications, 2018


  • Queueing network model for obstetric patient flow in a hospital

    Takagi Hideaki , Kanai Yuta , Misue Kazuo

    … A queueing network is used to model the flow of patients in a hospital using the observed admission rate of patients and the histogram for the length of stay for patients in each ward. … We confirm Little's law of queueing theory for the patient flow in each ward. …

    Health care management science 20(3), 433-451, 2017-09

    機関リポジトリ DOI

  • OneM2M Communication Based on the Internet of Things

    Oh Am-Suk

    Information : an international Interdisciplinary journal 20(8), 5727-5732, 2017-08

  • フォグコンピューティングにおけるジョブ割り振り戦略の検討 (情報ネットワーク)

    森 友哉 , 宇都宮 陽一 , 田 学軍 , 奥田 隆史

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 116(400), 25-30, 2017-01-19

  • ビジネスプロセスにおける「待ち」の形式化と検証

    白木 稜也 , 新川 芳行

    従来のビジネスプロセスモデリングでは、タスクの実行順序とタスク実行にかかわる資源や組織についての情報を体系的に記述することに重点が置かれ、時間的な特性は処理による遅延やデッドラインの指定など単純なものに限られている。しかし、現実のプロセスでは様々な原因による「待ち」が非同期に発生し、これによりタスクごとに待ち行列ができるため、複雑な待ち行列ネットワークが形成されることになる。本論文は時間付カラーペ …

    経営情報学会 全国研究発表大会要旨集 2017f(0), 115-118, 2017


  • Delay-aware sleep control of optical network unit in EPONs using disturbance observer

    Kikuchi Takahiro , Kubo Ryogo

    … Proportional-integral-derivative (PID)-based cyclic sleep controllers can maintain the average downstream queueing delay in an optical line terminal (OLT) at a constant level. … However, conventional PID-based controllers generate errors between a target queueing delay and an actual delay because of the nonlinear characteristics of the cyclic sleep mechanism. …

    IEICE Communications Express 6(11), 615-620, 2017


  • A TDMA-based hybrid transmission MAC protocol for Heterogeneous Vehicular Network

    ZHANG Tianjiao , ZHU Qi , LIANG Guangjun , XIN Jianfang , PAN Ziyu

    … Existing studies of vehicular ad hoc network usually consider only one data transmission model, while the increasing density of traffic data sources means that the vehicular ad hoc network is evolving into Heterogeneous Vehicular Network (HetVNET) which needs hybrid data transmission scheme. … In this paper, the queueing models of the vehicles and base station are analyzed respectively by one-dimensional and two-dimensional Markov Chain, and the expressions of throughput, packet drop rate and delay are also derived. …

    IEICE Transactions on Communications, 2017


  • vEPC Optimal Resource Assignment Method for Accommodating M2M Communications

    TANABE Kazuki , NAKAYAMA Hiroki , HAYASHI Tsunemasa , YAMAOKA Katsunori

    … We distinguish the communications of M2M devices and smartphones and model the vEPC server by using queueing theory. …

    IEICE Transactions on Communications, 2017


  • Bufferbloat Avoidance with Frame-Dropping Threshold Notification in Ring Aggregation Networks


    … queue model to demonstrate how bufferbloat is avoided with NRN+1CM's frame-dropping threshold-notification process. … The state probabilities and average queue size of each ring node were calculated with the model, proving that the average queue size is suppressed in several frames, but not in the most congested queue. … Computer simulation results confirm the validity of the queue model. …

    IEICE Transactions on Communications E100.B(2), 313-322, 2017


  • OpenFlowスイッチモデルの待ち行列理論を用いた性能解析 (ネットワークシステム)

    後藤 祐希 , 増山 博之 , Ng Bryan , Seah Winston K. G. , 高橋 豊

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 116(111), 85-90, 2016-06-23

  • BS-3-18 MULTISERVICE QUEUING SYSTEM WITH ELASTIC TRAFFIC(BS-3. Advanced Networking Technologies for Innovative Information Networks)

    Hanczewski Slawomir , Kmiecik Damian , Stasiak Maciej , Weissenberg Joanna

    … This article proposes a new model of a multiservice queueing system with elastic traffic. … The model makes it possible to determine individual delay characteristics in network nodes for each serviced call class. … The proposed model can be used to analyse present-day network systems. …

    電子情報通信学会総合大会講演論文集 2016年_通信(2), "S-46"-"S-47", 2016-03-01

  • Queuing Systems for the Internet

    STASIAK Maciej

    … This article proposes a versatile model of a multiservice queueing system with elastic traffic. … The model can provide a basis for an analysis of telecommunications and computer network systems, internet network systems in particular. …

    IEICE Transactions on Communications E99.B(6), 1234-1242, 2016



    Katou Ken'ichi , Takahashi Yukio

    … A new queueing model for customers requesting service positions at a counter is proposed. … This model was devised to evaluate the performance of a movable compact shelving system in a recently built university library, and it was used to plan that system. … In this paper, we analyze two simple cases, and then some variations of the model are discussed in connection with different service disciplines. …

    日本オペレーションズ・リサーチ学会論文誌 59(2), 147-173, 2016



    Okamura Hiroyuki , Dohi Tadashi

    … PH distribution is widely used in model-based performance evaluation such as reliability and queueing system, and is defied by an absorbing continuous-time Markov chain (CTMC). … Since non-Markovian model can be approximated by a CTMC by replacing general distributions with PH distributions, the parameter estimation is a challenging issue in stochastic modeling. …

    日本オペレーションズ・リサーチ学会論文誌 59(1), 72-109, 2016


  • Average Delay Analysis for an Opportunistic Spectrum Access Mechanism

    Jin Shunfu , Yue Wuyi , Ge Shiying

    甲南大学紀要. 知能情報学編 8(2), 99-108, 2015

  • Performance Evaluation for the Channel Aggregation Strategy in Cognitive Radio Networks

    Jin Shunfu , Yue Wuyi , Li Gang

    甲南大学紀要. 知能情報学編 8(2), 89-98, 2015

  • キスアンドライド車両の乗降位置選択行動を考慮した駅前広場交通シミュレーション

    井料(浅野) 美帆

    駅前広場の車両通行部分では,様々な利用者が錯綜することによる混雑が発生し,その影響は時に街路へと及ぶ.中でもキスアンドライド車両は乗降位置を自由に選択できるものの,その行動特性や,選択結果が渋滞発生へ与える影響は分かっていない.本論文は,キスアンドライド車両の送り・迎えの種別ごとの乗降位置選択行動と駅前広場の待ち行列発生パターンとの関連性を明らかにし,それを定量的に表現可能なシミュレーションモデル …

    土木学会論文集D3(土木計画学) 71(5), I_931-I_941, 2015


  • Availability Analysis of a Multibase System with Lateral Resupply between Bases

    OKUDA Naoki , TAMURA Nobuyuki , YUGE Tetsushi , YANAGI Shigeru

    … We construct a basic model that a spare item of a base is transported for operation to another base without spare upon occurrence of failure, and simultaneously, the base that supplies the spare item receives the failed item of the other base for repair. … Also, two modified models are constructed to show the efficiency of the basic model. … The two models modify the assumption on the lateral resupply of spare items between bases in the basic model. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E98.A(10), 2084-2090, 2015


  • 緊急時回線留保制御における到着呼量に基づく閾値設定法 (コミュニケーションクオリティ)

    田辺 和輝 , 宮田 純子 , 馬場 健一 [他] , 山岡 克式

    緊急時における輻輳対策として,回線交換機の一部を優先電話のために留保する回線留保制御が存在するが,余剰な回線の留保は一般電話収容数の減少を招くおそれがあり,優先電話が確保可能である範囲において,留保回線数は可能である限り少ない方が望ましい.また,更なる一般電話の収容数増大には,一般電話の適切な通話時間制限が有効であると考える.そこで本研究では,回線留保制御下での,優先電話および一般電話の予測呼量の …

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 114(298), 83-88, 2014-11-13