論文 - 伊藤 嘉浩
-
Evaluation of the Impact of Degradation of Accuracy of Time Synchronization of IEEE802.1AS on QoS Control in IEEE802.1TSN 査読あり
Haruto Kawasumi, Yoshihiro Ito
Proceedings of The 15th International Conference on ICT Convergence(ICTC) 2024年10月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Proposed Multi-Pathization method with SDN for multiple paths for TCP throughput 査読あり
Yuuki kobayashi, Yoshihiro Ito and Ryotaro Fujikami
2024年09月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Study on Appropriate Configuration of IEEE 802. 1TSN on Ethernet-Based Industrial Networks 査読あり
Momoka Abe, Yoshihiro Ito
2024年09月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
A study on realization of automotive SDN by P4 査読あり
Yuma Sakurai, Yoshihiro Ito
IEICE Communications Express 1 - 4 2024年08月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（学術雑誌）
-
A Study on Determination of an Appropriate GCL of Time-Aware Shaper in Ethernet-Based Industrial Networks 査読あり
Akari Yoshimura, Yoshihiro Ito
Proceedings of 2024 Fifteenth International Conference on Ubiquitous and Future Networks (ICUFN) 355 - 359 2024年07月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
QoS Evaluation of ATS in IEEE 802.1TSN on In-Vehicle Ethernet by Comparing with CBS and TAS 査読あり
Akari Yoshimura, Yoshihiro Ito
IEICE Communications Express 13 ( 9 ) 355 - 358 2024年06月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（学術雑誌）
-
Quantitative Evaluation of Effect of Congestion on Accuracy of IEEE 802.1AS Time Synchronization over In-Vehicle Network 査読あり
Maika Koizumi, Yoshihiro Ito
Proceedings of 2024 6th International Conference on Computer Communication and the Internet (ICCCI) 113 - 117 2024年06月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Performance Evaluation of IEEE 802.1TSN FP in Automotive Networks 査読あり
Nanako Nakashima, Yoshihiro Ito
Proceedings of 2024 6th International Conference on Computer Communication and the Internet (ICCCI) 124 - 127 2024年06月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
QoS Comparison between ATS, CBS and TAS in IEEE 802.1TSN over In-Vehicle Ethernet 査読あり
Akari Yoshimura Yoshihiro Ito
Proceedings of ICETC 2023 2023年11月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Study on Effect of Degradation of Time Synchronization in IEEE 802.1AS Caused by Congestion on QoS of TAS and CBS 査読あり
Yohei Ozawa, Yoshihiro Ito
Proceedings of 6th IEEE ICOIACT 2023 2023年11月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Evaluation of Effect of Congestion on Time Synchronization Accuracy in IEEE 802.1AS 査読あり
Yohei Ozawa, Yoshihiro Ito
Proceedings of ICTC 2023 2023年10月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
A Proposal of Throughput-Based MPTCP Scheduler for WebQoE Improvement 査読あり
Takeshi Kato, Yoshihiro Ito
Proceedings of ICTC 2023 2023年10月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Quantitative Evaluation of Effectiveness of FramePreemption in IEEE 802.1TSN on QoS over In-Vehicle Ethernet 査読あり
Honoka Awane, Yoshihiro Ito
Proceedings of ICTC 2023 2023年10月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
A study of a new routing scheme for QoS improvement using SDN 査読あり
Hayato Ito, Yoshihiro Ito
Proceedings of ICTC 2023 2023年10月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Study on Effect of Variable Traffic on QoS of ATS and TAS in IEEE 802.1TSN on In-Vehicle Ethernet 査読あり
Akari Yoshimura, Yoshihiro Ito
Proceedings of ICTC 2023 2023年10月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
QoS Comparison of ATS and CBS in IEEE 802.1TSN over In-Vehicle Ethernet Based on Automotive Use Case 査読あり
Akari Yoshimura, Yoshihiro Ito
Proceedings of ICTC 2023 2023年10月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
QoS Estimation of In-vehicle Ethernet with CBS and TAS by Multiple Regression Analysis 査読あり
Honoka Awane, Yoshihiro Ito
Proceedings of ICTC 2023 2023年10月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Study on adaptive routing with SDN for TCP throughput and fairness 査読あり
Hayato Ito, Yoshihiro Ito
Proceedings of URSI-GASS 2023 2023年08月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
An Evaluation on Appropriate to Scheduler of MPTCP for Throughput-Based Congestion Control for WebQoE 査読あり
Takeshi Kato, Yoshihiro Ito
Proceedings of URSI-GASS 2023 2023年08月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
高速化・高信頼化が進む車載イーサネット技術と標準化 招待あり 査読あり
伊藤嘉浩, 各務学
自動車技術会誌「自動車技術」 76 ( 11 ) 52 - 57 2022年11月
担当区分：筆頭著者 記述言語：日本語 掲載種別：研究論文（その他学術会議資料等）
-
Study on QoS Estimation of In-vehicle Ethernet with CBS by Multiple Regression Analysis 査読あり
Honoka Awane, Yoshihiro Ito, Koizumi Maika
Proceedings of ICTC 2022 2022年10月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
A Study of Effect of SPQ on IP Telephony Service with Binaural 3D Sounds 査読あり
Honoka Awane, Yoshihiro Ito, Koizumi Maika
Proceedings of ICTC 2022 2022年10月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
A Proposal of Method of Finding Appropriate idleSlope Values Over In-Vehicle Ethernet With CBS 査読あり
Moe Nitta, Yoshihiro Ito, Akari Yoshimura
Proceedings of ICTC 2022 2022年10月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Proposal of a New Adaptive Multi-Pathization Method for TCP and UDP by SDN 査読あり
Hayato Ito, Yoshihiro Ito, Shun Sugimoto
Proceedings of IEEE GCCE 2022 2022年10月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Evaluation of Adaptive Changing Control in Multi-Pathization Method With SDN for Web Services 査読あり
Shun Sugimoto Yoshihiro Ito, Hayato Ito,
Proceedings of IEEE GCCE 2022 2022年10月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Proposal of Adaptation of 3D Sound IP Phone Service to Online Meetings 査読あり
Moe Nitta, Yoshihiro Ito, Yohei Ozawa
Proceedings of IEEE GCCE 2022 2022年10月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Study on SPQ and CBS Effect on QoS Over Wired Home Networks 査読あり
Taleb Ennouhe, Yoshihiro Ito
Proceedings of IEEE GCCE 2022 2022年10月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
A Proposal of Throughput-Based Congestion Control of MPTCP for WebQoE Improvement 査読あり
Takeshi Kato, Yoshihiro Ito
Proceedings of IEEE GCCE 2022 2022年10月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Evaluation of TCP Performance Under In-Vehicle Networks With IEEE 802.1 TSN 査読あり
Yohei Ozawa, Yoshihiro Ito
Proceedings of IEEE GCCE 2022 2022年10月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
QoS Evaluation of In-Vehicle Network with SPQ of IEEE 802.1TSN 査読あり 国際誌
Moe Nitta, Yoshihiro Ito
Proceedings of IEEE 12th International Conference on ICT Convergence 2021年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
-
QoS Evaluation of Home Network with IEEE 802.1TSN 査読あり 国際誌
Taleb Ennouhe, Yoshihiro Ito
Proceedings of IEEE 12th International Conference on ICT Convergence 2021年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
-
Proposal of Adaptive TCP Multi-Pathization Method with SDN 査読あり 国際誌
Shun Sugimoto, Yoshihiro Ito
Proceedings of 2021 IEEE 10th Global Conference on Consumer Electronics (GCCE) 2021年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
-
Study on the Application of IEEE 802.1TSN and EDCA to Home Networking 査読あり 国際誌
Lei Pan, Yoshihiro Ito
Proceedings of 2021 IEEE 10th Global Conference on Consumer Electronics (GCCE) 2021年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
-
Study on Combinations of QoS Controls for In-Vehicle Network with IEEE 802.1TSN 査読あり 国際誌
Kohei Hirano, Yoshihiro Ito
Proceedings of 2021 IEEE 10th Global Conference on Consumer Electronics (GCCE) 2021年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
-
Study on Effect of Time Synchronization Precision on QoS with Time-Aware Shaper 査読あり 国際誌
Chisa Kobayashi, Yoshihiro Ito
Proceedings of 2021 IEEE 10th Global Conference on Consumer Electronics (GCCE) 2021年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
-
QoS Evaluation of combination SPQ, FRER and FP for In-Vehicle Networks 査読あり 国際誌
Moe Nitta, Yoshihiro Ito, Masato Hayakawa
IEICE Communications Express 2021年06月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：電子情報通信学会
This paper evaluates QoS of the next-generation in-vehicle Ethernet-based networks in combination with the following three controls defined in IEEE 802.1TSN by simulation. The authors target Strict Priority Queueing (SPQ), Frame Replication and Elimination for Reliability (FRER) and Frame Preemption (FP). The experimental results indicate the followings. First, traffic of the highest priority should be applied SPQ to guarantee its QoS. Second, it is necessary to adopt an appropriate combination of QoS control for traffics of other priority in order to prevent them from deteriorating too much.
DOI： 10.1587/comex.2021COL0012
その他リンク： https://www.jstage.jst.go.jp/article/comex/advpub/0/advpub_2021COL0012/_article
-
IoTネットワークに対するSDNを用いたTCPのマルチパス化方式のWebサービスにおけるQoSおよびQoEの評価 査読あり
中山 瑠偉，伊藤 嘉浩，吉田 優希，岩田 夏織
電気学会論文誌C 140 ( 12 ) 2020年12月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：電気学会
-
輻輳時におけるIEEE802.11g無線 LAN の最大伝送速度に対するWebQoSとWebQoEの評価 査読あり
早川 雅人，伊藤 嘉浩
電気学会論文誌C 140 ( 12 ) 2020年12月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：電気学会
-
Study on a Method of Estimations QoS for In-Vehicle Network with SPQ of IEEE802.1 査読あり 国際誌
Chisa Kobayashi, Yoshihiro Ito
Proceedings of 2020 IEEE 8th Global Conference on Consumer Electronics (GCCE) 2020年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
This paper studies a method of estimation QoS for
in-vehicle Ethernet with SPQ. Although SPQ is the simplest and
the most fundamental control, the estimation method of QoS is not yet clear for an in-vehicle Ethernet with multiple switches. The authors evaluate QoS provided by SPQ by simulation. By adapting the regression analysis to the results, the authors obtain an equation of estimating QoS and show its effectiveness. -
Evaluation of QoS Under the Network with SPQ, FRER and FP 査読あり 国際誌
Masato Hayakawa, Yoshihiro Ito
Proceedings of 2020 IEEE 8th Global Conference on Consumer Electronics (GCCE) 2020年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
This paper studies the evaluation of QoS over a network that supports IEEE802.1TSN standards. The authors focus on IEEE802.1Q, IEEE802.1CB, and IEEE802.1Qbu and evaluate the QoS under the environment combined with these standards by simulation. From the results, the paper shows how to utilize these standards to meet the required QoS.
-
Study on Affect of GCL of Time-Aware Shaper on QoS for IEEE802.1 TSN Networks 査読あり 国際誌
Rui Nakayama, Yoshihiro Ito
Proceedings of 2020 IEEE 8th Global Conference on Consumer Electronics (GCCE) 2020年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
—A time-triggered scheduling mechanism called
Time-Aware Shaper (TAS) is one of IEEE802.1 Standards and
has a parameter, which is called Gate Control List (GCL), to
control for each class of stream or traffic. QoS will be degraded if the implementer of TAS does not use an appropriate value of the GCL. This paper studies the effect of the GCL on QoS over a network which supports TAS to search an appropriate value of the GCL. -
Study on Appropriate IdleSlope Value of Credit Based Shaper for QoS Control on In-Vehicle Ethernet 査読あり 国際誌
Kohei Hirano, Yoshihiro Ito
Proceedings of 2020 IEEE 8th Global Conference on Consumer Electronics (GCCE) 2020年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
This paper investigates an appropriate value of IdleSlope which is a controllable value of Credit Based Shaper (CBS) for required Quality of Service (QoS) by simulation. The simulation results indicate that the IdleSlop
-
Webサービスの品質向上のためのSDNによるMPTCPサブフロー間遅延差の抑制方式の提案 査読あり
伊津見 光樹,伊藤 嘉浩
電子情報通信学会論文誌 B J103-B ( 8 ) 353 - 360 2020年08月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：電子情報通信学会
本論文は，MPTCPにおけるQoSを向上させる方式を提案している．MPTCPにおける通信では，サブフロー間に遅延差があると，パケットの到着順序の入れ替わりなどにより，QoSが低下することが知られている．本方式は各サブフローをSDNを用いてマルチパス化することで，既存のプロトコルに変更を加えることなく，サブフロー間の遅延差を軽減するものである．これにより，サブフローレベルではなくコネクションレベルのパケット到着順序の入れ替わりを抑制し，QoSを向上させることができる．筆者らは本方式を実装し，実機を用いた実験により，その有効性を評価している．実験結果より，本方式により，QoSが向上することを確認している．
DOI： 10.14923/transcomj.2020JBP3003
その他リンク： https://search.ieice.org/bin/summary.php?id=j103-b_8_353
-
A Study on QoE Improvement of Online Games with UDP Multipathization by SDN 査読あり 国際誌
So Takabayashi,Yoshihiro Ito
Proceedings of The ACM Chapter International Conference on Educational Technology, Language and Technical Communication (ETLTC) 2020 2020年01月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：ACM
-
Assessment of TCP Multi-Pathization Method on IoT Devices by SDN Based on WebQoE 査読あり 国際誌
Yuki Yoshida,Yoshihiro Ito
Proceedings of The ACM Chapter International Conference on Educational Technology, Language and Technical Communication (ETLTC) 2020 2020年01月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：ACM
-
WebQoEをベースとした輻輳時の無線LANにおけるEDCAパラメータチューニングの提案 査読あり
丹羽晃介,伊藤嘉浩
電子情報通信学会論文誌 B J103-B ( 1 ) 22 - 28 2020年01月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：電子情報通信学会
本論文は，筆者らが開発したWebサービスの体感品質(WebQoE)を基にQoS制御を行う無線LAN基地局において，最適なEDCAパラメータを検討している．この無線LAN基地局は，QoS制御としてIEEE802.11のための制御として標準化されているEDCAを採用している．EDCAはQoS制御に関する幾つかのパラメータをもつが，これらの最適な値はこれまで検討されていない．本研究では，二つの実サービスを対象とし，QoEの推定式を用いQoEを推定し，WebQoEを維持しつつ，より使用帯域を削減することができる最適なEDCAパラメータ値を求めている．また，被験者を用いたQoE評価実験も行い，得られたパラメータの有効性を確認している．
DOI： 10.14923/transcomj.2019JBP3018
その他リンク： https://search.ieice.org/bin/summary.php?id=j103-b_1_22&category=B&year=2020&lang=J&abst=
-
Proposal of new TCP congestion control to suppress QoS Fluctuation for Web services 査読あり 国際誌
Kenta Sone, Yoshihiro Ito, Airi Hasegawa
Proceedings of IEEE 10th International Conference on ICT Convergence 2019年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
-
Study on appropriate EDCA Parameter values of WebQoE-based Wireless LAN Base Station for Multiple services 査読あり 国際誌
Ryosuke Shiraki, Yoshihiro Ito
Proceedings of IEEE 10th International Conference on ICT Convergence 2019年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
-
Proposal of a Method of Reducing Difference of Mean Delay Between Paths in MPTCP by SDN 査読あり 国際誌
Koki Izumi, Yoshihiro Ito
Proceedings of 2019 IEEE 8th Global Conference on Consumer Electronics (GCCE) 2019年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
-
Study on an Appropriate Value of the Maximum Transmission Rate over Congested IEEE802.11g Wireless LAN Based on WebQoE 査読あり 国際誌
Masato Hayakawa, Yoshihiro Ito
Proceedings of 2019 IEEE 8th Global Conference on Consumer Electronics (GCCE) 2019年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
-
QoS Evaluation of IEEE 802.1 TSN Network for Video Streaming 査読あり 国際誌
Rui Nakayama, Yoshihiro Ito
Proceedings of 2019 IEEE 8th Global Conference on Consumer Electronics (GCCE) 2019年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Study of Relationship between QoS and QoE for Web Services with Parallax Effect 査読あり 国際誌
Yoshihiro Ito, Rui Nakayama, Natsumi Nakao
Proceedings of IEEE 4th International Conference on Consumer Electronics Asia 2019 (ICCE-Asia 2019) 2019年06月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
-
Proposal of Multi-path TCP Packet Scheduler to Adjust Trade-off between QoS Fluctuation and Throughput for WebQoE Improvement 査読あり 国際誌
Kensuke Noda, Yoshihiro Ito
Proceedings of 2019 IEEE 4th International Conference on Computer and Communication Systems (ICCCS) 493 - 496 2019年02月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
This paper proposes a new MPTCP packet scheduler for improvement of Quality of Experience for a Web service (WebQoE); it suppresses the Quality of Service (QoS) fluctuation while maintaining the minimum throughput required for a Web service. The proposed scheduler adjusts a trade-off between the degree of QoS fluctuation and the throughput according to the observed Round-Trip-Time (RTT). The authors implemented the proposed scheduler and evaluated its QoS by actual experiments. The results show that the proposed scheduler could adjust the trade-off between the QoS fluctuation and the throughput.
-
Study on Depending on the OpenFlow Controller Placement of Multi-pathization Method 査読あり 国際誌
Kaori Iwata, Yoshihiro Ito
Proceedings of 2019 IEEE 4th International Conference on Computer and Communication Systems (ICCCS) 712 - 715 2019年02月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
This paper proposes a new method of improving multi-pathization method by only selecting the placement of OpenFlow controller. The performance of the multi-pathization is degraded by the difference in delay. The authors implemented their method by actual IoT devices and evaluate QoS by experiment. From the results of experiments, the TCP throughput when the location of the OpenFlow controller is appropriately selected is higher than that of multi-pathization method without our method. Thus, the proposed method decreases the difference in delay by replacing an OpenFlow controller adequately.
-
Study of Multi-Path TCP Scheduler to Suppress QoS Fluctuation for Improving WebQoE 査読あり 国際誌
Kensuke Noda, Yoshihiro Ito
Proceedings of IEIE/IEEE 2019 International Conference on Electronics, Information, and Communication (ICEIC) 2019年01月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
This paper proposes a new packet scheduler of MPTCP to suppress Quality of Service (QoS) fluctuation for improvement of Quality of Experience for a Web service (WebQoE). The scheduler estimates the fluctuation of QoS from that of the packet delay, and preferentially sends a packet to uncongested path to suppress the fluctuation. The authors implement the proposed scheduler and evaluate QoS by experiments under various environments. From the results, they show that the proposed method deteriorates QoS but suppresses the fluctuation as compared with the default scheduler under various environments.
-
WebQoEに基づいたIEEE802.11g無線LANの最大伝送速度制御の提案 査読あり
田渕 茉也, 伊藤 嘉浩
電気学会論文誌C 138 ( 12 ) 1464 - 1468 2018年12月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：電気学会
This paper proposes a method of estimating the most appropriate transmission rate of an IEEE 802.11g wireless LAN based on QoE for Web services. The method utilizes the linear multiple regression analysis to find a formula for calculating QoE from QoS; it then estimates the most appropriate transmission rate by using the multiple regression line. This paper confirms the effectiveness of the method by experiment. In the experiment, the authors target actual two Web services, a shopping service and a map service; they consider the round trip time and the packet loss ratio as QoS parameters and treat the satisfaction as a QoE parameter. The authors performed QoS evaluation and QoE assessment. The experimental results show the appropriateness of the method.
-
Application of TCP Multi-Pathization Method with SDN by IoT Devices to Web Service 査読あり 国際誌
Yuki Yoshida, Yoshihiro Ito
Proceedings of IEEE ICTC 2018 2018年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
-
Study of a method of supporting IP routing for MPTCP by SDN 査読あり 国際誌
Koki Izumi, Yoshihiro Ito
Proceedings of IEEE ICTC 2018 2018年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
-
Public Viewing Service with High Presence by Using Binaural 3D Audio IP Phone 査読あり 国際誌
Yuki Yoshida, Yoshihiro Ito, Kaori Iwata
Proceedings of IEEE GCCE 2018 2018年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
-
QoS Evaluation of MPTCP over a Multi-Hop Wireless Network for IoT Devices 査読あり 国際誌
Koki Izumi, Yoshihiro Ito, Kensuke Noda
Proceedings of IEEE GCCE 2018 2018年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
-
EDCA Parameter Tuning for QoE-Centric Wireless LAN Access Point 査読あり 国際誌
Kosuke Niwa, Yoshihiro Ito
Proceedings of IEEE GCCE 2018 2018年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
-
Proposal of Novel MPTCP Congestion Control to Suppress QoS Fluctuation for WebQoE Improvement 査読あり 国際誌
Kensuke Noda, Yoshihiro Ito
Proceedings of IEEE ICCE-Berlin 2018 2018年09月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
This paper proposes a new congestion control of Multi-Path TCP (MPTCP) for improvement of Quality of Experience (QoE). This method controls the congestion window for each subflow so as to suppress the fluctuation of Quality of Service (QoS). The fluctuation of QoS is estimated from that of the Round Trip Time, and the congestion window is controlled according to the estimated fluctuation. The authors implemented the proposed method and evaluate QoS by experiment. The experimental results show that the proposed method can suppress the fluctuation of QoS as compared with the existing congestion controls of MPTCP under congestion.
-
Proposal of Multi-Pathization Method of UDP with SDN for NFS 査読あり 国際誌
Kaori Iwata, Yoshihiro Ito
Proceedings of IEEE ISNCC 2018 2018年06月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
-
Development of Wireless LAN Base Station with QoS Control Based on Web-QoE by Bandwidth Control and Priority Control 査読あり 国際誌
Shiho Asano, Yoshihiro Ito
Electronics and Communications in Japan 101 ( 5 ) 12 - 21 2018年05月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：John Willey & Sons, Inc.
This paper develops a wireless local area network (LAN) base station with quality of service control based on Web quality of experience (QoE) by bandwidth control and priority control; it evaluates the performance of the developed system by experiments with subjects. By using the relationship between importance of data of a Web service and the distribution of the length of IP packets, the base station can reduce the bandwidth consumption over a wireless LAN without worsening of QoE. The authors have implemented by adopting two technologies for priority control: OpenFlow and Wi‐Fi multimedia. In the experiment, the authors treat three actual Web services and assess QoE for them. From the experimental results, the authors show the effectiveness of the developed base station.
DOI： 10.1002/ecj.12058
その他リンク： https://onlinelibrary.wiley.com/doi/abs/10.1002/ecj.12058
-
帯域制御と優先制御を用いたWeb-QoEに基づくQoS制御を行う 無線LAN基地局の開発 査読あり
淺野志帆, 伊藤嘉浩
電気学会論文誌C 137 ( 12 ) 1 - 9 2017年12月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：電気学会
-
Proposal and Development of TCP Multi-Pathization Method with SDN by IoT Devices 査読あり 国際誌
Kaori Iwata, Yoshihiro Ito
Proceedings of 2017 27th International Telecommunication Networks and Applications Conference (ITNAC) 39 - 44 2017年11月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
-
Study on Congestion Control of Multipath TCPBased on Web-QoE 査読あり 国際誌
Kensuke Noda, Yoshihiro Ito
Proceedings of 2017 IEEE 6th Global Conference on Consumere Electronics (GCCE2017) 708 - 710 2017年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
-
Development of Self-propelled Repeater between Isolated LANs via Wi-Fi 査読あり 国際誌
Kim YoungJoo, Yoshihiro Ito
Proceedings of 2017 IEEE 6th Global Conference on Consumere Electronics (GCCE2017) 172 - 173 2017年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
-
A Study on Adjusting EDCA Parameters of QoE-Based Wireless LAN Base Station 査読あり 国際誌
Kosuke Niwa, Yoshihiro Ito
Proceedings of ICTC 2017 599 - 601 2017年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
-
Estimation of appropriate transmission rate via a IEEE 802.11 wireless LAN based on WebQoE 査読あり 国際誌
Maya Tabuchi, Yoshihiro Ito
Proceedings of 2017 IEEE International Symposium on Local and Metropolitan Area Networks (LANMAN) 1 - 2 2017年06月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
Abstract:
This paper discusses the most appropriate transmission rate of IEEE 802.11 wireless LAN based on QoE for Web services. Since some QoS parameters have trade-off relationship between each other for the transmission rate, it is difficult to decide the appropriate value of the rate. Thus the authors clarify the relationship between QoE and QoS for Web services by the linear multiple regression analysis. They then adapt measured values of the packet loss rate and those of RTT as QoS parameters for the relationship, and estimate the transmission rate which maximizes the QoE. The authors targeted two actual Web services; shop service and map service; they performed experiments. Their experimental results show that the highest satisfaction can be given when the transmission rate are 9.125 Mb/s and 24.472 Mb/s for the shopping service and the map service, respectively. -
Study on MPTCP Enhancement by IP Routing for WebQoE Improvement 査読あり 国際誌
Yasuomi Muraki, Yoshihiro Ito, Kasumi Tashiro
Proceedings of 2017 International Conference on Platform Technology and Service (PlatCon) 1 - 4 2017年02月
記述言語：英語 掲載種別：研究論文（その他学術会議資料等） 出版者・発行元：IEEE
This paper studies enhancement of Multi-Path TCP(MPTCP), which is one of new transport-layer protocols of TCP/IP protocol suites, by IP routing for improvement of Quality of Experience for a Web service (WebQoE). In order to confirm the effect of IP routing on WebQoE, the author performed experiments with subjects. In the experiment, the subjects assess Quality of Experience of two actual Web services for different paths under 5 experimental environments. The author utilizes Web usability as QoE parameters. The results show that it is desirable to use appropriate routing for MPTCP enhancement in order to improve Web- Quality of Experience.
-
IPv4/v6共存環境下におけるリレールータを介した低遅延な経路選択機構の提案と評価 査読あり
溝口知彦, 伊藤嘉浩
電子情報通信学会和文論文誌B J99-B ( 12 ) 1 - 9 2016年12月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：電子情報通信学会
-
WebサービスにおけるQoE向上のためのQoSの変動を抑制する新しいTCP服装制御方式の提案 査読あり
柴田将旭, 伊藤嘉浩
電気学会論文誌C 136 ( 12 ) 1 - 7 2016年12月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：電気学会
-
Study of the Effect of the Mean and Standard Deviation of Response Time on QoE in Web Services 査読あり 国際誌
Maya Tabuchi, Yoshihiro Ito
Proceedings of ICTC 2016 637 - 639 2016年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
This paper assesses the influence of the mean and the standard deviation of the response time on Quality of Experience(QoE) for a Web service by experiments with subjects. In the experiments, the authors target actual two Web services over the Internet: map service and shopping service; they assess QoE with three scales which are based on ISO924111 usability. And then, the authors reveal the relationship the RTT and the QoE parameters by the linear regression analysis. Our experimental results show that QoE of the map service is affected by the standard deviation of the RTT more strongly than the mean of the RTT while QoE of the shopping service is influenced by the mean more than the standard deviation. Therefore, for the map service, QoS control which is reducing the packet loss by buffering and so on to maintain WebQoE. On the other hand, for the shopping service, QoS control which is reducing the delay is appropriate.
-
Study on Relationship between QoS Degradation and QoE for Web services with Personal Digital Assistant 査読あり 国際誌
YeongJoo Kim, Yoshihiro Ito
Proceedings of ICTC 2016 267 - 269 2016年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
ThispaperstudiestheeffectoftheQoSdegradation on WebQoE with personal digital assistant (PDA) by experiment. In the experiment, the authors utilize three types of terminals: PDA, tablet PC and desktop PC; they assess QoE for two actual Web services. The experimental results show that the effect of QoS degradation on QoE with PDA is less than that of a desktop PC for one service. However, for the other service, little different between the effects is recognized. As a result, the paper confirms that the effect of QoS degradation on QoE depends on the type of a terminal.
-
Study on Novel Method of QoE Assessment with Electromyogram for an Electronic Book Webcast Service 査読あり 国際誌
Kaori Iwata, Yoshihiro Ito
Proceedings of ICTC 2016 646 - 648 2016年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
This paper studies a novel method of an electronic book Webcast service with electromyography. The proposed method has the following three features. First, we can perform the proposed method at a low cost. Second, the method does not heavily load down users. Finally, the method is portable so we can do it in many situations. This paper did experiments with 18 subjects for an actual Electronic Comics Webcast service. The experimental results show that it is effective for assessing degree of fatigue of the service to utilize the method.
-
Proposal of Method for Assessing Hierarchical Relationship between QoS and QoE for Web Services 査読あり 国際誌
Yuuna Adachi, Yoshihiro Ito
Proceedings of ICTC 2016 637 - 639 2016年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
This study proposes a novel method of evaluating hierarchical relationship between QoS and QoE for Web services by utilizing the path analysis and the principal component analysis. The proposed method shorten the number of QoS parameters each layer with the principal component analysis; it then clarify the relationship between the QoS and the QoE by performing the path analysis. To confirm the effectiveness of the proposed method, this paper does experiments with subjects for the three actual Web services and analyzes the relationship between QoS and QoE from the results by the proposed method. The experimental results show the effectiveness of this method.
DOI： 978-1-5090-1325-8/16
-
Development of QoE Initiated Wireless LAN Base Station with DPI Based QoS Control 査読あり 国際誌
Shiho Asano, Yoshihiro Ito
Proceedings of IEICE APNOMS 2016 2016年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEICE
In this paper, the authors develop a novel wireless LAN base station with DPI(Deep Packet Inspection) based QoS control, which can maintain QoE during congestion. In the QoS control, the base station always monitors the file type which is found in HTTP messages encapsulated in an IP packet and prioritizes the packet. Since the control is light weight, it can be easily implemented a LAN base station. The authors developed a prototype of the wireless LAN base station with WMM; and they evaluate it by QoE assessment with subjects for actual two Web services. From the experimental results, the authors show the effectiveness of the developed wireless LAN station.
-
6to4 環境下で通信品質の劣化がWeb ユーザビリティに及ぼす影響の定量的評価 査読あり
溝口 知彦,伊藤 嘉浩,小屋敷 涼
電気学会論文誌 C 136 ( 4 ) 493 - 501 2016年04月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：電気学会
This paper evaluates effect of the overheads caused by 6to4 tunneling on QoE for Web services by experiment. The authors consider Web usability as QoE and treat three actual Web services which support both of the IPv4 Internet and the IPv6 Internet. The results show that the effect of QoS degradation caused by 6to4 on Web usability depends on the Web service. According to Web service, QoE degradation caused by 6to4 does not always occur.
-
Study on Appropriate TCP Congestion Control for WebQoE Improvement 査読あり
Masaaki Shibata,Yoshihiro Ito
Proceedings of IEICE Workshop on Internet Architecture and Applications 141 - 145 2015年11月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEICE
This paper studies an appropriate TCP congestion control for a Web service from a user’s point of view by experiment. In the experiment, trying some congestion controls on both of a Web server and a Web client, the
authors assess QoE for a Web service. This paper considers a Web shopping service as a target one and uses three major congestion controls: TCP Cubic, TCP Vegas and TCP Illinois. The experimental results show that the effect
of the difference between the three congestion controls is not remarkable. However, in some case, when a Web client adopts TCP Vegas, the QoE for the Web service can be degraded. They confirm that the difference between congestion controls on the Web client can also affect QoE for the Web server. -
Comparison of WebQoE between 6to4 and Teredo 査読あり 国際誌
Tomohiko Mizoguchi,Yoshihiro Ito
Proceedings of 2015 International Conference on Information and Communication Technology Convergence (ICTC) 576 - 578 2015年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
This paper compares two methods of IPv4/IPv6 coexistence from the point of view of WebQoE (Quality of Experience for Web services) by experiment. The authors adopt 6to4 and Teredo as methods of the coexistence. Almost all of the methods of the coexistence degrade QoS(Quality of Service) owing to their overheads. Consequently, they can also degrade WebQoE. However, the difference of the effect of QoS deterioration on QoE is not clarified. This paper evaluates QoS and WebQoE under both of the environment with 6to4 and that with Teredo. In the experiment, the authors utilize three actual Web services. From the experimental results, the authors confirm that both of 6to4 and Teredo degrade QoS but find the difference between effect on WebQoE with 6to4 and that of Teredo depends on Web services.
-
Development of Wireless LAN Base Station with Web-QoE Based QoS Control 査読あり 国際誌
Shiho Asano,Yoshihiro Ito
Proceedings of 2015 International Conference on Information and Communication Technology Convergence (ICTC) 5 - 7 2015年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
control and evaluate its performance by experiment. By adapting a statistical characteristic of Web service traffic to QoS control, the base station can keep high QoE without worsening of congestion over wireless LAN; it is implemented by adopting two technologies: OpenFlow and WMM. In the experiment, the authors treat three actual Web services and assess QoE for them. From the experimental results, the authors show the effectiveness of the developed base station.
-
Study on effect of congestion control of multipath TCP on Web-QoE 査読あり 国際誌
Yasuomi Muraki,Yoshihiro Ito
Proceedings of 2015 IEEE 4th Global Conference on Consumer Electronics (GCCE) 52 - 53 2015年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
This paper studies effect of congestion control of Multipath TCP(MPTCP) on QoE by experiments for Web services. In the experiment, the authors treat three congestion controls of MPTCP: TCP NewReno, TCP Vegas and MPTCP LIA and target two actual Web services; they utilize the Web usability as QoE parameters. The experimental results show that the difference of congestion control can affect QoS but cannot affect Web-QoE very much.
-
Effect of QoS degradation on Parallax Effect in Web Services 査読あり 国際誌
Yuna Adachi, Yoshihiro Ito
Proceedings of 2015 IEEE 4th Global Conference on Consumer Electronics (GCCE) 1 - 2 2015年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
This paper studies an effect of QoS degradation on the parallax effect for Web services by experiment. In the experiment, the authors consider 23 actual Web services and assess QoE of them. The experimental results show that, even if QoS is deteriorated, the parallax effect can be maintained for some services. Moreover, the authors study the characteristics of such the services and find common characteristics of them. From these results, the authors suggest that if we make Web pages with the parallax effect properly, they can become tolerant to QoS degradation.
-
Assessment of Sense of Presence for 3D IP Phone Service Under Actual Environments 査読あり 国際誌
Minoru Tsubota,Yoshihiro Ito
Proceedings of 2015 IEEE 4th Global Conference on Consumer Electronics (GCCE) 3 - 4 2015年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
This paper assesses the sense of presence for the 3D IP phone service with the binaural recording by experiments under actual environments. In the experiments, the authors consider seven actual environments where we meet in our daily life. The experimental results show that, under the actual environments, the 3D IP phone service can give higher sense of presence than a monaural IP phone even if it utilize a low bit-rate coding. Consequently, the authors confirm the practicality of our 3D IP phone service.
-
Study of Web Service Estimation Using Only Ethernet Frame Header or IP Packet Header 査読あり 国際誌
Daichi Sugita,Yoshihiro Ito
Proceedings of 2015 IEEE 4th Global Conference on Consumer Electronics (GCCE) 93 - 94 2015年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
This paper proposes a Web service estimation method by using only Ethernet frame header or IP packet header and confirms effectiveness of the method by experiment. Within the frame header of packet header, the proposed method uses only information that is not encrypted, such as the length. Therefore, the method can be applied to secure communication. This paper does experiments for 18 Web services, and confirms the effectiveness of the proposed method.
-
A Method of Evaluating Effect of QoS Degradation on Multidimensional QoE of Web Service with ISO - based Usability 査読あり
Daisuke Yamauchi, Yoshihiro Ito
International Journal of Computer Networks & Communications 7 ( 1 ) 19 - 33 2015年01月
記述言語：英語 掲載種別：研究論文（学術雑誌）
-
A Method of QoE Management in Online Shopping Web Services with TCP Variables 査読あり 国際誌
Daisuke Yamauchi, Yoshihiro Ito,Toru Tahara
Internetworking Indonesia Journal 2015年01月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：IIJ
For service level agreement over company networks or community ones, this paper proposes a simple method of QoE evaluation with objective TCP variables in an online shopping Web service for SLM. It also confirms the effectiveness by experiment. In this experiment, the authors measure 31 variables concerned with TCP performance and assess user’s satisfaction as a QoE parameter for three actual shopping Web services. Then, to clarify relationship between the user’s satisfaction and the objective TCP variables, they utilize multivariate statistics: the principal component analysis and the multiple regression analysis. The experimental results show that the user-satisfaction can be easily estimated with three or four objective TCP variables in the online shopping service.
-
Evaluation of QoE of Web services on a mobile host over a wireless LAN by simulator/emulator system 査読あり
Masaki Shibata, Yoshihiro Ito, Ryosuke Koshimura
Proceedings of 2014 International Conference on Information and Communication Technology Convergence 77 - 81 2014年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
This paper studies a method of assessing QoE of Web services on a mobile host over a wireless LAN. To perform QoE assessment, the authors utilize their integrated simulator/emulator system. This experiment assumes six scenarios where pedestrians assess Web services while moving. The authors treat a shopping service and a Wiki service as target Web services and consider Web usability as QoE. The experimental results do not confirm that degradation of QoE depends on that of QoS. Consequently, it is inevitable to assess actual QoE and the integrated simulator/emulator system is effective in performing such assessment.
-
Evaluation of Relationship between QoS and QoE for Web Services Considering the Hierarchical Structure with Principal Component Analysis and Path Analysis 査読あり
Ryosuke Koshimura, Yoshihiro Ito
Proceedings of 2014 20th Asia-Pacific Conference on Communications 100 - 105 2014年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Assessment of VoIP phone service with binaural 3D audio for multiple sound sources 査読あり
Minoru Tsubota, Yoshihiro Ito, Ryo Murakami
Proceedings of 2014 IEEE 3rd Global Conference on Consumer Electronics 660 - 661 2014年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
This paper assesses the 3D sound IP phone service (3D IP phone) developed by the authors under environment with multiple sound sources by experiment. The assessment consists of evaluation of the sound source localization, subjective evaluation and objective one. The authors utilize two sound sources that are conversations carried on by a man and a woman. From the experimental results, this paper shows that multiple sound sources can promote listener's reproduction of sound images. This means that the proposed system can give the higher feeling of being in more real environment.
-
Assessment of sense of presence for 3D IP phone service 査読あり
Ryo Murakami, Yoshihiro Ito
Proceedings of 2014 IEEE 3rd Global Conference on Consumer Electronic 567 - 570 2014年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
This paper assesses the sense of presence for the 3D audio VoIP phone service with the binaural recording which is proposed by the authors by experiment. In the experiment, the authors use sounds recorded with actual heads, and evaluate the sense of presence and the sound source localization. The experimental results show the subjects can perceive high sense of presence by using our service. Moreover, they also indicate that the difference of actual heads for recording affect both the sense of presence and sound source localization.
-
A study of effect of MPTCP on Web usability 査読あり
Daisuke Yamauchi, Yoshihiro Ito
Proceedings of 2014 IEEE 3rd Global Conference on Consumer Electronic 12 - 15 2014年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
This paper studies an effect of utilization of Multi-Path TCP (MPTCP) on QoE for Web services. The authors consider the Web usability as QoE and assess it by experiments with subjects; they compare the results of MPTCP with those of TCP. The experimental results show the followings. Indeed the utilization of MPTCP can provide higher QoS of the target Webservices than that of TCP, but it does not always improve QoE.
-
Empirical Study on Clarification of Relationship Between QoS and QoE for Web Services by Path Analysis 査読あり
Ryosuke Koshimura, Yoshihiro Ito
Proceedings of 2014 IEEE 3rd Global Conference on Consumer Electronics 10 - 11 2014年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
This paper empirically studies clarification of complex relationships between hierarchical QoS and QoE for Web services with the method using the path analysis. In the experiment, the authors treat three Web services and consider 10 parameters of three-layered QoS and four QoE parameters; they suggest a new model for a path diagram. The obtained path diagrams give high goodness-of-fit, 0.916, 0.915, and 0.902, and can clarify the QoS-QoE relationships.
-
Effect of QoS Degradation Caused by 6to4 and IPsec on QoE for Web Services 査読あり
Tomohiko Mizoguchi, Yoshihiro Ito
Proceedings of 2014 IEEE 3rd Global Conference on Consumer Electronics 5 - 9 2014年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
This paper assesses influence of QoS degradation caused by 6to4 and IPsec on QoE of Web services by experiment. Since utilization of 6to4 and IPsec requires some overheads, QoS degradation caused by them is inevitable. The degradation can also deteriorate QoE of the Web service, but the affect of the degradation has not been clarified. From the experimental results, the authors confirm QoS degradation but see little QoE deterioration. This implies 6to4 and IPSec are usable from a user's point of view.
-
Study of necessary number of simultaneous TCP connections in Web client by Web-QoE assessment 査読あり
Daisuke Yamauchi, Yoshihiro Ito
Proceedings of 2013 International Conference on ICT Convergence 234 - 237 2013年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
This paper studies the necessary number of simultaneous TCP connections in a Web client for high Web-QoE. Currently, many Web browsers use multiple TCP connections simultaneously for effective data transmission. However, more simultaneous TCP connections make more establishments/closes of connections and do not always give higher quality of a Web service because users often access to the Web services interactively. Moreover, increase of simultaneous TCP connections causes high load of a Web server. That is, there exist a necessary number of simultaneous TCP connections. The authors assess the necessary number of TCP connections for an online shopping Web service by experiment; here, they utilizes two psychophysical methods: the rating scale method and the method of the limit. From experimental results, they show that the necessary number of simultaneous TCP connections for high TCP throughput is not always the same as that for high Web-QoE.
-
Development of Web-QoE evaluation system for wireless LAN with combination of simulator and network emulator 査読あり
Ryosuke Koshimura, Yoshihiro Ito
Proceedings of 2013 IEEE 2nd Global Conference on Consumer Electronics 431 - 432 2013年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
This paper shows development of a system for assessment of Web-QoE over wireless LANs. By simulation, we can easily consist various types of experimental networks, such as a wireless network, but cannot perform Web-QoE (Quality of Experience of Web services) assessment. On the other hand, we can utilize a network emulator to assess Web-QoE instead of using actual networks. However, such a network emulator cannot imitate many kinds of networks flexibly. Thus, the authors have developed a new system by combining a simulator with a network emulator. This paper confirms that this system is effective in assessment of Web-QoE by experiment.
-
Assessment of sound source localization and subjective quality for VoIP phone service with binaural 3D audio 査読あり
Ryo Murakami, Yoshihiro Ito
Proceedings of 2013 IEEE 2nd Global Conference on Consumer Electronics 142 - 146 2013年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
This paper studies the feasibility of a VoIP phone service with binaural 3D audio. For this purpose, the paper evaluates it with the objective and subjective evaluation that are for the legacy IP phone services by experiment. Moreover, it assesses the sound source localization, which is inherent in evaluation of 3D audio, for the service. By experiment, the authors show that ITU-T G.711 is better than Speex for the encoding of the service; consequently, they indicate the service is feasible over the Internet.
-
Evaluation of relationship between network performance and Web usability considering the hierarchical structure of the QoS with path analysis 査読あり
Yosuke Nomura, Yoshihiro Ito
Proceedings of 2013 IEEE 2nd Global Conference on Consumer Electronics 518 - 519 2013年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
As web services run on the Internet, the deterioration communication quality on the Internet has a great influence on Web usability. The communication quality(QoS) has a hierarchical structure because the Internet architecture is also hierarchical. This paper studies the relationship between multiple communication quality evaluations between layers, including quality of experience. In order to do so, we propose the evaluation method by using path analysis to evaluate the effects on Web usability. The experimental results show that satisfaction, one of the scales for Web usability, has a strong relationship with the number of packet retransmission per unit time in TCP layer and it was influenced by packetloss in IP layer indirectly. As a consequence, we confirmed the effectiveness of the evaluation method by using path analysis.
-
Effect of network performance degradation on web usability over 6to4 networks 査読あり
Ryo Koyashiki, Yoshihiro Ito
Proceedings of 2013 IEEE 2nd Global Conference on Consumer Electronics 516 - 517 2013年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
6to4 is one of the transitional technologies for coexistence of IPv4 and IPv6 and uses tunneling. Using 6to4, however, communication quality is degraded due to overhead of tunneling. In this paper, we investigate the effect of the degradation of communication quality in 6to4 on Web usability that is user experience quality of the Web service. From experimental results, we found that the effect of Web usability due to degradation of 6to4 depends on Web service.
-
Evaluation of Effect of IP Performance Degradation on QoE-Web of Online Shopping Service 査読あり
Yosuke Nomura, Yoshihiro Ito
Proceedings of IEICE 2013 International Workshop on Smart Info-Media Systems in Asia 172 - 176 2013年09月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
paper studies effect of IP performance degradation on quality of experience (QoE) of an online shopping Web service by experiment; it considers the usability based on the ISO 9241-11 as QoE of a Web service (QoE-Web) and the IP performance metrics standardized by the IETF. Moreover, the paper tackles clarification of the relationship between ISO-based QoE-Web and IETF-based IP performance by the multiple regression analysis. The experiment is intended for the two actual Japanese online shopping services and utilizes 35 subjects. From the results, the paper quantitatively discusses how the QoE-Web deteriorates owing to the IP performance degradation and shows that it is appropriate to evaluate the deterioration with ISO-based Web usability.
-
Evaluation of Influence of IP QoS Degradation on Web–QoE by Severity Rating Method 査読あり
Yoshihiro Ito, Yosuke Nomura
Proceedings of IEEE The 9th Asia-Pacific Conference on Communicaitons 404 - 408 2013年08月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
This paper studies evaluation of influence of IP
performance degradation on QoE of a Web service by means of the severity rating method. The authors consider Web usability as the QoE and tackle to evaluate it by using Nielsen’s severity rating. The severity on the Web usability is one of measures
that represent how a problem degrades the usability of a Web service. This paper defines the concrete scales about the severity and evaluates them for the two existing online shopping services by experiments, which consist of the two stages. One is done to clarify problems caused by the IP performance degradation, and the other is for assessment of Web usability with the severity rating. From the results, this study clarifies the four problems and measures the severity for each problem; it then shows how the problems aggravate the Web usability of the services. Consequently, the authors confirm that the severity
rating method is effective in evaluation of the influence of the IP quality deterioration on QoE of a Web service. -
A study on Effect of IP performance degradation on Horizontal Sound Localization in a VoIP Phone Service with 3D Sound Effects 査読あり
Yoshihiro Ito, Toru Tahara, Susumu Kuroyanagi
Proc. 2012 IIAI International Conference on Advanced Applied Informatics 357 - 361 2012年09月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（学術雑誌）
This paper studies a VoIP phone service with 3D sound effects (3D effect phone), which gives users more feeling of being at a live communication than legacy phone services. However, since an IP network is a best-effort one, we must consider effect of IP performance degradation on the 3D effect phone service. This paper evaluates effect of a speech coding IP packet loss on horizontal sound localization by experiment. The experimental results show the following three issues. First, a 3D effect phone service is feasible. Second, ITU-T G. 711 encoding is more suitable to the service than Speex encoding. Third, IP packet losses deteriorate horizontal sound localization.
-
Study on Effect of IP Performance Degradation on Web Usability with the Severity Rating 査読あり
Yoshihiro Ito, Hiroyuki Haga
Proc. APCHI'12 2 767 - 768 2012年08月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（学術雑誌）
This paper studies the effect of IP performance degradation on Web usability by using Nielsen’s severity rating. The severity on the Web usability is one of measures that represent how a problem degrades the usability of a Web service; it is obtained from three attributes: the frequency, the impact and the persistence. This paper defines the concrete scales about the severity and evaluates them for the two existing online shopping services by experiments, which consist of the two stages. One is done to clarify problems caused by the IP performance degradation, and the other is for assessment of Web usability with the severity rating. From the results, this study clarifies the four problems and measures the severity for each problem; it then shows how the problems aggravate the Web usability of the services.
-
Evaluation of User-Satisfaction in Online Shopping Web Services with TCP Variables 査読あり
Yoshihiro Ito, Tohru Tahara
Proc. IEEE/IPSJ SAINT 2011 Workshop C3NET 2011 469 - 473 2011年07月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Calculation of necessary QoS for user satisfaction with a QoS mapping matrix 査読あり
Yoshihiro Ito
Proceedings of the 2010 10th IEEE/IPSJ International Symposium on Application and the Internet 1 ( 1 ) 233 - 236 2010年07月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Feasibility of QoS control based n QoS mapping over IP networks "jointly worked" 査読あり
Y. Ito, S. Tasaka
Elsevier Computer Commnications 31 ( 10 ) 2589 - 2595 2008年06月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（学術雑誌）
-
User-level QoS assessment of a multipoint-to-multipoint TV conferencing application over IP networks "jointly worked" 査読あり
Y. Ito, S. Tasaka
Proceedings of the 5th IEEE/IFIP Workshop on End-to-End Monitoring Techniques and Sevices (E2EMON2007) 1 - 8 2007年05月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Y. Ito S. Tasaka
IEICE Transactions on Communications E90-B ( 5 ) 1112 - 1121 2007年05月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（学術雑誌）
-
User-level QoS assessment of a multipoint-to-multipoint TV conferencing applications over IP networks "jointly worked" 査読あり
Y. Ito, S. Tasaka
COnference Record of IEEE Global Telecommunications Conference (GLOBECOM2006) QRP08-2 2006年11月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
A method of user-level QoS guarantee by session controll in audio-video tranmission ove IP networks "jointly worked" 査読あり
S. Tasaka, Y. Ito, Y. Yamada, J. Sako
Conference Record of IEEE Global Telecommunications Conference (GLOBECOM2006) GRP08-2 2006年11月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Enhancement of user-level QoS in audio-video IP transmission by utilizing the mutually compensatory property "jointly worked" 査読あり
S. Tasaka, J. Sako, Y. Ito
Conference Record of IEEE Global Telecommunicaitons Conference (GLOBECOM2006) MMC02-1 2006年11月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Feasibility of QoS control based on QoS mapping in audio-video transmission over IEEE 802.11 wireless LAN "jointly worked" 査読あり
Y. Ito, S. Tasaka
Conference Record of IEEE International Conference on Communications (ICC2006) 2 5097 - 5102 2006年06月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Real-time estimation of user-level QoS of audio-video transmission over IP networksn "jointly worked" 査読あり
S. Tasaka, Y. Ito
Comference Record of IEEE International Conference on Communications (ICC2006) 2 884 - 890 2006年06月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Continuous time assessment and mapping of user-level QoS in audio-video transmission over IP networks "jointly worked" 査読あり
Y. Ito, S. Tasaka, R. Ito
Proceedings of IASTED Communications and Computer Networks (CCN2005) 230 - 237 2005年10月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Effect of monitor size on user-level QoS of audio-video transmission over IP networks in ubiquitous environment "jointly worked" 査読あり
Y. Ito, S. Tasaka
Proceedings of IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC2005) 2005年09月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Quantitative assessment of user-level QoS and its mapping "jointly worked" 査読あり
Y.Ito, S. Tasaka
IEEE Trans. Multimedia 7 ( 3 ) 572 - 584 2005年06月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（学術雑誌）
-
IPネットワーク上での音声・ビデオ伝送におけるユーザレベルQoSの多次元評価 (共著） 査読あり
伊藤嘉浩, 田坂修二
電子情報通信学会論文誌 J88-B ( 3 ) 689 - 702 2005年03月
担当区分：筆頭著者 記述言語：日本語 掲載種別：研究論文（学術雑誌）
-
Psychometric analysis of the effect of the buffering delay on user-level QoS in an interactive audio-visual application "jointly worked" 査読あり
Y. Ito, S. Tasaka, Y. Fukuta
Proc. ACM Workshop on Next-Generation Residential Broadband Challenges 2 - 10 2004年10月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Psychometric analysis of the effect of end-to-end delay on user-level QoS in live audio-video transmission "jointly worked"
Y. Ito, S. Tasaka, Y. Fukuta
Conf. Rec. IEEE ICC2004 2214 - 2220 2004年06月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
User-level QoS assessment with psychometric methods and QoS mapping "jointly worked" 査読あり
Y. Ito, S. Tasaka
Proceedings of International Conference on Computer, Communication and Control Technologies (CCCT'03) 3 127 - 131 2003年07月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Psychometric analysis of the mutually compensatory property of multimedia QoS "jointly worked" 査読あり
S. Tasaka, Y. Ito
Conf. Rec. IEEE ICC2003 1880 - 1886 2003年05月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
音声・ビデオ伝送におけるメディア同期を対象としたユーザレベルQoSの定量的測定及びマッピング 査読あり
伊藤嘉浩, 田坂修二
電子情報通信学会論文誌 J86-B ( 3 ) 485 - 498 2003年03月
担当区分：筆頭著者 記述言語：日本語 掲載種別：研究論文（学術雑誌）
-
Variably Weighted Round Robin Queueing for Core IP Routers 査読あり
Y. Ito, S. Tasaka, Y. Ishibashi
Proceedings of IEEE International Performance, Computing, and Communications Conference (IPCCC 2002) 159 - 166 2002年04月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Comparison of Multi-Window and SACK TCP over Wireless Links 査読あり
Y. Ito, K. Yamazaki, S. Tasaka
IEICE Transaction of Communications E84-B ( 11 ) 614 - 617 2001年09月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（学術雑誌）
-
A proposal for pseudo-traffic model for IP network evaluation 査読あり
Y. Ito, K. Yamazaki, S. Iisaku, T. Asami
Proceedings of the Internet Workshop 2001 (IWS’2001) 127 - 132 2001年02月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Development of the flexible and general IP evaluation tool STAGE 査読あり
Y. Ito, Y. Hei, M. Ishikura, T. Asami
IEICE Transactions on Information and Systems E83-D ( 5 ) 1003 - 1011 2000年05月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（学術雑誌）
-
Rate-adaptive real-time multicast TV conference system with locally adaptive packet flow control
Y. Ito, S. Sakazawa, M. Ishikura, T. Asami
IEICE Transactions on Information and Systems E82-D ( 4 ) 815 - 821 1999年04月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（学術雑誌）
-
A traffic measurement tool for IP-based networks 査読あり
M. Ishikura, Y. Ito, O. Maeshima, T. Asami
IEICE Transactions on Information and Systems E82-D ( 4 ) 756 - 761 1999年04月
記述言語：英語 掲載種別：研究論文（学術雑誌）
-
A method of service quality estimation with a network measurement tool 査読あり
O. Maeshima, Y. Ito, M. Ishikura, T. Asami
Proceedings of 18th IEEE International Performance, Computing, and Communications Conference (IPCCC 1999) 201 - 209 1999年02月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
ネットワーク特性評価ツールを用いたサービス品質推定法 （共著） 査読あり
前島治, 伊藤嘉浩, 石倉雅巳, 浅見徹
Proceedings of Internet Conference '98 1998年12月
記述言語：日本語 掲載種別：研究論文（その他学術会議資料等）
-
A Wide-band IP tunneling router with resource reservation 査読あり
Y. Ito, O. Maeshima, M. Ishikura, T. Asami
Proceedings of the Internet Workshop ’98 (IWS’98) 128 - 134 1998年03月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Bandwidth-guaranteed IP tunneling router with RSVP "jointly worked" 査読あり
Y. Ito, M. Ishikura O. Maeshim, T. Asami
Proceedings of IEEE International Performance, Computing, and Communications Conference (IPCCC 1998) 291 - 29７ 1998年02月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
-
Multi connection TCP mechanism for high performance transport in an ATM network "jointly worked" 査読あり
M. Ishikura, Y. Ito, K. Yamazaki, T. Asami
Proceedings of the International IFIP-IEEE Conference on Broadband communications’96 443 - 454 1996年04月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
This paper proposes a new transport mechanism, multi-connection TCP, for high-speed and long delay networks. With to the appearance of ATM network services, wide area data comminication networks(WANs) are becoming faster and more world wide oriented. In this situation, the performance of window-based, flow-controlled and connection-oriented transport protocols, such as TCP, is degraded far from the optimum. The throughput of TCP is limited by its window size and round trip delay time(RTT), and the ideal throughput of TCP with 64Kbyte maximum window size over a trans-Pacific ocean link such as TCP-4 is only about 2.6Mbps for a 45Mbps DS3 line with 200ms RTT. In order to achieve high throughput of inter-LAN communications via a high speed, long delay WAN, such as B-ISDN, we propose a multiconnection TCP, and verify its performance by applying it to FTP. A multi-connection FTP can establish up to 16 connections simultaneously, and transfer the data in parallel. The experiment shows multi connection TCP (16 connections and 24Kbytes of each window size ) achieves about 8.5Mbps end-to-end throughput via an emulated OC3 155Mbps WAN with 200ms RTT.
-
物体形状に対する視知覚特性を模する物理的距離の構成 （共著） 査読あり
伊藤嘉浩, 佐藤幸男
電子情報通信学会論文誌 J76-D-II ( 8 ) 1604 - 1611 1993年08月
担当区分：筆頭著者 記述言語：日本語 掲載種別：研究論文（学術雑誌）
本論文では3次元物体の形状に対する人間の視知覚の特性を心理学的に解析する一つの方法について述べると共に，知覚特性に基づいて機械の視覚の中にそのような特性を埋め込むことを試みている．対象物体としては幾何的に単純でありながらその異同を表現しにくい物体である人体幹部を採用している．人体のモデルを用いて心理実験を行い，人間が感じる物体形状間の類似性を定量化し，多次元尺度法によって対象物体を心理的距離空間に布置した．物体形状の物理的な特徴を記述する方法としては大局的特徴に基づく相違性測度である擬距離を用い，五つの擬距離から心理的距離に適合する物理的な距離を合成した．この結果，心理的距離空間を説明する特徴として五つの擬距離が有効であることが示された．
前のページ - 次のページ 