Details of a Researcher - ITO Yoshihiro

Papers - ITO Yoshihiro

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Evaluation of the Impact of Degradation of Accuracy of Time Synchronization of IEEE802.1AS on QoS Control in IEEE802.1TSN Reviewed

Haruto Kawasumi, Yoshihiro Ito

Proceedings of The 15th International Conference on ICT Convergence(ICTC) 2024.10

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

Proposed Multi-Pathization method with SDN for multiple paths for TCP throughput Reviewed

Yuuki kobayashi, Yoshihiro Ito and Ryotaro Fujikami

2024.09

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

Study on Appropriate Configuration of IEEE 802. 1TSN on Ethernet-Based Industrial Networks Reviewed

Momoka Abe, Yoshihiro Ito

2024.09

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

A study on realization of automotive SDN by P4 Reviewed

Yuma Sakurai, Yoshihiro Ito

IEICE Communications Express 1 - 4 2024.08

Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal)

DOI： 10.23919/comex.2024COL0018

A Study on Determination of an Appropriate GCL of Time-Aware Shaper in Ethernet-Based Industrial Networks Reviewed

Akari Yoshimura, Yoshihiro Ito

Proceedings of 2024 Fifteenth International Conference on Ubiquitous and Future Networks (ICUFN) 355 - 359 2024.07

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

DOI： 10.1109/ICUFN61752.2024.10624926

QoS Evaluation of ATS in IEEE 802.1TSN on In-Vehicle Ethernet by Comparing with CBS and TAS Reviewed

Akari Yoshimura, Yoshihiro Ito

IEICE Communications Express 13 ( 9 ) 355 - 358 2024.06

Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal)

DOI： 10.23919/comex.2024XBL0085

Quantitative Evaluation of Effect of Congestion on Accuracy of IEEE 802.1AS Time Synchronization over In-Vehicle Network Reviewed

Maika Koizumi, Yoshihiro Ito

Proceedings of 2024 6th International Conference on Computer Communication and the Internet (ICCCI) 113 - 117 2024.06

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

DOI： 10.1109/ICCCI62159.2024.10674349

Performance Evaluation of IEEE 802.1TSN FP in Automotive Networks Reviewed

Nanako Nakashima, Yoshihiro Ito

Proceedings of 2024 6th International Conference on Computer Communication and the Internet (ICCCI) 124 - 127 2024.06

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

DOI： 10.1109/ICCCI62159.2024.10674202

QoS Comparison between ATS, CBS and TAS in IEEE 802.1TSN over In-Vehicle Ethernet Reviewed

Akari Yoshimura Yoshihiro Ito

Proceedings of ICETC 2023 2023.11

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

Study on Effect of Degradation of Time Synchronization in IEEE 802.1AS Caused by Congestion on QoS of TAS and CBS Reviewed

Yohei Ozawa, Yoshihiro Ito

Proceedings of 6th IEEE ICOIACT 2023 2023.11

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

Evaluation of Effect of Congestion on Time Synchronization Accuracy in IEEE 802.1AS Reviewed

Yohei Ozawa, Yoshihiro Ito

Proceedings of ICTC 2023 2023.10

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

A Proposal of Throughput-Based MPTCP Scheduler for WebQoE Improvement Reviewed

Takeshi Kato, Yoshihiro Ito

Proceedings of ICTC 2023 2023.10

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

Quantitative Evaluation of Effectiveness of FramePreemption in IEEE 802.1TSN on QoS over In-Vehicle Ethernet Reviewed

Honoka Awane, Yoshihiro Ito

Proceedings of ICTC 2023 2023.10

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

A study of a new routing scheme for QoS improvement using SDN Reviewed

Hayato Ito, Yoshihiro Ito

Proceedings of ICTC 2023 2023.10

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

Study on Effect of Variable Traffic on QoS of ATS and TAS in IEEE 802.1TSN on In-Vehicle Ethernet Reviewed

Akari Yoshimura, Yoshihiro Ito

Proceedings of ICTC 2023 2023.10

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

QoS Comparison of ATS and CBS in IEEE 802.1TSN over In-Vehicle Ethernet Based on Automotive Use Case Reviewed

Akari Yoshimura, Yoshihiro Ito

Proceedings of ICTC 2023 2023.10

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

QoS Estimation of In-vehicle Ethernet with CBS and TAS by Multiple Regression Analysis Reviewed

Honoka Awane, Yoshihiro Ito

Proceedings of ICTC 2023 2023.10

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

An Evaluation on Appropriate to Scheduler of MPTCP for Throughput-Based Congestion Control for WebQoE Reviewed

Takeshi Kato, Yoshihiro Ito

Proceedings of URSI-GASS 2023 2023.08

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

Study on adaptive routing with SDN for TCP throughput and fairness Reviewed

Hayato Ito, Yoshihiro Ito

Proceedings of URSI-GASS 2023 2023.08

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

高速化・高信頼化が進む車載イーサネット技術と標準化 Invited Reviewed

伊藤嘉浩, 各務学

自動車技術会誌「自動車技術」 76 ( 11 ) 52 - 57 2022.11

Authorship：Lead author Language：Japanese Publishing type：Research paper (other academic)

Study on QoS Estimation of In-vehicle Ethernet with CBS by Multiple Regression Analysis Reviewed

Honoka Awane, Yoshihiro Ito, Koizumi Maika

Proceedings of ICTC 2022 2022.10

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

A Study of Effect of SPQ on IP Telephony Service with Binaural 3D Sounds Reviewed

Honoka Awane, Yoshihiro Ito, Koizumi Maika

Proceedings of ICTC 2022 2022.10

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

A Proposal of Method of Finding Appropriate idleSlope Values Over In-Vehicle Ethernet With CBS Reviewed

Moe Nitta, Yoshihiro Ito, Akari Yoshimura

Proceedings of ICTC 2022 2022.10

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

Proposal of a New Adaptive Multi-Pathization Method for TCP and UDP by SDN Reviewed

Hayato Ito, Yoshihiro Ito, Shun Sugimoto

Proceedings of IEEE GCCE 2022 2022.10

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

Evaluation of Adaptive Changing Control in Multi-Pathization Method With SDN for Web Services Reviewed

Shun Sugimoto Yoshihiro Ito, Hayato Ito,

Proceedings of IEEE GCCE 2022 2022.10

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

Proposal of Adaptation of 3D Sound IP Phone Service to Online Meetings Reviewed

Moe Nitta, Yoshihiro Ito, Yohei Ozawa

Proceedings of IEEE GCCE 2022 2022.10

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

Study on SPQ and CBS Effect on QoS Over Wired Home Networks Reviewed

Taleb Ennouhe, Yoshihiro Ito

Proceedings of IEEE GCCE 2022 2022.10

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

A Proposal of Throughput-Based Congestion Control of MPTCP for WebQoE Improvement Reviewed

Takeshi Kato, Yoshihiro Ito

Proceedings of IEEE GCCE 2022 2022.10

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

Evaluation of TCP Performance Under In-Vehicle Networks With IEEE 802.1 TSN Reviewed

Yohei Ozawa, Yoshihiro Ito

Proceedings of IEEE GCCE 2022 2022.10

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

QoS Evaluation of In-Vehicle Network with SPQ of IEEE 802.1TSN Reviewed International journal

Moe Nitta, Yoshihiro Ito

Proceedings of IEEE 12th International Conference on ICT Convergence 2021.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

QoS Evaluation of Home Network with IEEE 802.1TSN Reviewed International journal

Taleb Ennouhe, Yoshihiro Ito

Proceedings of IEEE 12th International Conference on ICT Convergence 2021.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

Proposal of Adaptive TCP Multi-Pathization Method with SDN Reviewed International journal

Shun Sugimoto, Yoshihiro Ito

Proceedings of 2021 IEEE 10th Global Conference on Consumer Electronics (GCCE) 2021.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

Study on the Application of IEEE 802.1TSN and EDCA to Home Networking Reviewed International journal

Lei Pan, Yoshihiro Ito

Proceedings of 2021 IEEE 10th Global Conference on Consumer Electronics (GCCE) 2021.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

Study on Combinations of QoS Controls for In-Vehicle Network with IEEE 802.1TSN Reviewed International journal

Kohei Hirano, Yoshihiro Ito

Proceedings of 2021 IEEE 10th Global Conference on Consumer Electronics (GCCE) 2021.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

Study on Effect of Time Synchronization Precision on QoS with Time-Aware Shaper Reviewed International journal

Chisa Kobayashi, Yoshihiro Ito

Proceedings of 2021 IEEE 10th Global Conference on Consumer Electronics (GCCE) 2021.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

QoS Evaluation of combination SPQ, FRER and FP for In-Vehicle Networks Reviewed International journal

Moe Nitta, Yoshihiro Ito, Masato Hayakawa

IEICE Communications Express 2021.06

Language：English Publishing type：Research paper (scientific journal) Publisher：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

Other Link： https://www.jstage.jst.go.jp/article/comex/advpub/0/advpub_2021COL0012/_article

QoS and QoE Evaluation of TCP Multi-Pathization Method with SDN over IoT networks for Web Service Reviewed

140 ( 12 ) 2020.12

Language：Japanese Publishing type：Research paper (scientific journal)

This paper studies the effectiveness of the TCP multi-pathization method with SDN for IoT networks on Web services by experiments of QoS/QoE assessment. The experimental results show that the method is affected less by a difference of delay between paths and can always provide higher QoS than normal TCP for Web services. In addition, the authors indicate that the method can provide higher QoE than normal TCP, and suppresses QoE degradation more. From the above results, the paper confirms that the TCP multi-pathization method with SDN is effective for Web services.

Assessment of QoS/QoE for the Maximum Transmission Rate over Congested IEEE802.11g Wireless LAN for Web Services Reviewed

140 ( 12 ) 2020.12

Language：Japanese Publishing type：Research paper (scientific journal)

This paper studies an appropriate value of the maximum transmission rate under congested for IEEE802.11g wireless LAN by experiments with subjects. In the experiment, the authors studied the appropriate value of maximum trans- mission rate according to Quality of Experience(QoE) for Web services. This paper treats actual two Web services: Google map and Amazon. This paper studied the QoE-based appropriate values of the maximum transmission rate by experiment. As a result, as Google map and Amazon, we found that the suitable maximum transmission rate exits two point to improve QoE. For Google map, one does not change by the degree of congestion and the other change by it. For Amazon, the suitable maximum transmission does not change regardless of the number of user.

Evaluation of QoS Under the Network with SPQ, FRER and FP Reviewed International journal

Masato Hayakawa, Yoshihiro Ito

Proceedings of 2020 IEEE 8th Global Conference on Consumer Electronics (GCCE) 2020.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：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 Reviewed International journal

Rui Nakayama, Yoshihiro Ito

Proceedings of 2020 IEEE 8th Global Conference on Consumer Electronics (GCCE) 2020.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：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 Reviewed International journal

Kohei Hirano, Yoshihiro Ito

Proceedings of 2020 IEEE 8th Global Conference on Consumer Electronics (GCCE) 2020.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：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

Study on a Method of Estimations QoS for In-Vehicle Network with SPQ of IEEE802.1 Reviewed International journal

Chisa Kobayashi, Yoshihiro Ito

Proceedings of 2020 IEEE 8th Global Conference on Consumer Electronics (GCCE) 2020.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：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.

Proposal of a Method of Reducing Delay Difference between Subflows of MPTCP by SDN for Web QoS Improvement Reviewed

Koki Izumi, Yoshihiro Ito

IEICE Transactions on Communications J103-B ( 8 ) 353 - 360 2020.08

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：IEICE

DOI： 10.14923/transcomj.2020JBP3003

Other Link： 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 Reviewed International journal

So Takabayashi,Yoshihiro Ito

Proceedings of The ACM Chapter International Conference on Educational Technology, Language and Technical Communication (ETLTC) 2020 2020.01

Language：English Publishing type：Research paper (international conference proceedings) Publisher：ACM

Assessment of TCP Multi-Pathization Method on IoT Devices by SDN Based on WebQoE Reviewed International journal

Yuki Yoshida,Yoshihiro Ito

Proceedings of The ACM Chapter International Conference on Educational Technology, Language and Technical Communication (ETLTC) 2020 2020.01

Language：English Publishing type：Research paper (international conference proceedings) Publisher：ACM

Study on EDCA Parameter Tuning over Congested Wireless LAN Based on WebQoE Reviewed

Kosuke Niwa, Yoshihiro Ito

J103-B ( 1 ) 22 - 28 2020.01

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Institute of Electronics, Information and Communication Engineers

This paper studies appropriate values of EDCA parameters for the authors' developed wire- less LAN station, which can reduce the bandwidth usage without deteriorating QoE (Quality of Experience) for a Web service. As a QoS control, the wireless LAN station utilizes EDCA, which is standardized in IEEE 802.11e; EDCA has some parameters for QoS control. However appropriate values of the EDCA parameters for the station have never been discussed. The authors study values of EDCA parameters which can reduce more bandwidth usage without degrading QoE by using QoS-QoE mapping equations. Moreover they assess QoE for actual two Web services by an experiment with subjects and confirm that the obtained parameters are effective.

DOI： 10.14923/transcomj.2019JBP3018

Other Link： 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 Reviewed International journal

Kenta Sone, Yoshihiro Ito, Airi Hasegawa

Proceedings of IEEE 10th International Conference on ICT Convergence 2019.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

Study on appropriate EDCA Parameter values of WebQoE-based Wireless LAN Base Station for Multiple services Reviewed International journal

Ryosuke Shiraki, Yoshihiro Ito

Proceedings of IEEE 10th International Conference on ICT Convergence 2019.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

Proposal of a Method of Reducing Difference of Mean Delay Between Paths in MPTCP by SDN Reviewed International journal

Koki Izumi, Yoshihiro Ito

Proceedings of 2019 IEEE 8th Global Conference on Consumer Electronics (GCCE) 2019.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

QoS Evaluation of IEEE 802.1 TSN Network for Video Streaming Reviewed International journal

Rui Nakayama, Yoshihiro Ito

Proceedings of 2019 IEEE 8th Global Conference on Consumer Electronics (GCCE) 2019.10

Language：English Publishing type：Research paper (international conference proceedings)

Study on an Appropriate Value of the Maximum Transmission Rate over Congested IEEE802.11g Wireless LAN Based on WebQoE Reviewed International journal

Masato Hayakawa, Yoshihiro Ito

Proceedings of 2019 IEEE 8th Global Conference on Consumer Electronics (GCCE) 2019.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

Study of Relationship between QoS and QoE for Web Services with Parallax Effect Reviewed International journal

Yoshihiro Ito, Rui Nakayama, Natsumi Nakao

Proceedings of IEEE 4th International Conference on Consumer Electronics Asia 2019 (ICCE-Asia 2019) 2019.06

Authorship：Lead author Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

Proposal of Multi-path TCP Packet Scheduler to Adjust Trade-off between QoS Fluctuation and Throughput for WebQoE Improvement Reviewed International journal

Kensuke Noda, Yoshihiro Ito

Proceedings of 2019 IEEE 4th International Conference on Computer and Communication Systems (ICCCS) 493 - 496 2019.02

Language：English Publishing type：Research paper (international conference proceedings) Publisher：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.

DOI： 10.1109/CCOMS.2019.8821657

Study on Depending on the OpenFlow Controller Placement of Multi-pathization Method Reviewed International journal

Kaori Iwata, Yoshihiro Ito

Proceedings of 2019 IEEE 4th International Conference on Computer and Communication Systems (ICCCS) 712 - 715 2019.02

Language：English Publishing type：Research paper (international conference proceedings) Publisher：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.

DOI： 10.1109/CCOMS.2019.8821736

Study of Multi-Path TCP Scheduler to Suppress QoS Fluctuation for Improving WebQoE Reviewed International journal

Kensuke Noda, Yoshihiro Ito

Proceedings of IEIE/IEEE 2019 International Conference on Electronics, Information, and Communication (ICEIC) 2019.01

Language：English Publishing type：Research paper (international conference proceedings) Publisher：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.

DOI： 10.23919/ELINFOCOM.2019.8706378

Proposal of QoE-based Method of Estimating Appropriate Transmission Rate of IEEE 802.11g Wireless LAN for Web Services Reviewed

Maya Tabuchi, Yoshihiro Ito

IEEJ Transactions on Electronics, Information and Systems 138 ( 12 ) 1464 - 1468 2018.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Institute of Electrical Engineers of Japan

DOI： 10.1541/ieejeiss.138.1464

Application of TCP Multi-Pathization Method with SDN by IoT Devices to Web Service Reviewed International journal

Yuki Yoshida, Yoshihiro Ito

Proceedings of IEEE ICTC 2018 2018.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

DOI： 10.1109/ICTC.2018.8539508

Study of a method of supporting IP routing for MPTCP by SDN Reviewed International journal

Koki Izumi, Yoshihiro Ito

Proceedings of IEEE ICTC 2018 2018.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

DOI： 10.1109/ICTC.2018.8539679

Public Viewing Service with High Presence by Using Binaural 3D Audio IP Phone Reviewed International journal

Yuki Yoshida, Yoshihiro Ito, Kaori Iwata

Proceedings of IEEE GCCE 2018 2018.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

DOI： 10.1109/GCCE.2018.8574650

QoS Evaluation of MPTCP over a Multi-Hop Wireless Network for IoT Devices Reviewed International journal

Koki Izumi, Yoshihiro Ito, Kensuke Noda

Proceedings of IEEE GCCE 2018 2018.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

DOI： 10.1109/GCCE.2018.8574504

EDCA Parameter Tuning for QoE-Centric Wireless LAN Access Point Reviewed International journal

Kosuke Niwa, Yoshihiro Ito

Proceedings of IEEE GCCE 2018 2018.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

Proposal of Novel MPTCP Congestion Control to Suppress QoS Fluctuation for WebQoE Improvement Reviewed International journal

Kensuke Noda, Yoshihiro Ito

Proceedings of IEEE ICCE-Berlin 2018 2018.09

Language：English Publishing type：Research paper (international conference proceedings) Publisher：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.

DOI： 10.1109/ICCE-Berlin.2018.8576208

Proposal of Multi-Pathization Method of UDP with SDN for NFS Reviewed International journal

Kaori Iwata, Yoshihiro Ito

Proceedings of IEEE ISNCC 2018 2018.06

Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

Development of Wireless LAN Base Station with QoS Control Based on Web-QoE by Bandwidth Control and Priority Control Reviewed International journal

Shiho Asano, Yoshihiro Ito

Electronics and Communications in Japan 101 ( 5 ) 12 - 21 2018.05

Language：English Publishing type：Research paper (scientific journal) Publisher：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

Other Link： https://onlinelibrary.wiley.com/doi/abs/10.1002/ecj.12058

Development of Wireless LAN Base Station with QoS Control Based on Web-QoE by Bandwidth Control and Priority Control Reviewed

Shiho Asano, Yoshihiro Ito

IEEJ Transactions on Electronics, Information and Systems 137 ( 12 ) 1 - 9 2017.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：IEE

DOI： 10.1541/ieejeiss.137.1

Proposal and Development of TCP Multi-Pathization Method with SDN by IoT Devices Reviewed International journal

Kaori Iwata, Yoshihiro Ito

Proceedings of 2017 27th International Telecommunication Networks and Applications Conference (ITNAC) 39 - 44 2017.11

Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

Study on Congestion Control of Multipath TCPBased on Web-QoE Reviewed International journal

Kensuke Noda, Yoshihiro Ito

Proceedings of 2017 IEEE 6th Global Conference on Consumere Electronics (GCCE2017) 708 - 710 2017.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

Development of Self-propelled Repeater between Isolated LANs via Wi-Fi Reviewed International journal

Kim YoungJoo, Yoshihiro Ito

Proceedings of 2017 IEEE 6th Global Conference on Consumere Electronics (GCCE2017) 172 - 173 2017.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

A Study on Adjusting EDCA Parameters of QoE-Based Wireless LAN Base Station Reviewed International journal

Kosuke Niwa, Yoshihiro Ito

Proceedings of ICTC 2017 599 - 601 2017.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

Estimation of appropriate transmission rate via a IEEE 802.11 wireless LAN based on WebQoE Reviewed International journal

Maya Tabuchi, Yoshihiro Ito

Proceedings of 2017 IEEE International Symposium on Local and Metropolitan Area Networks (LANMAN) 1 - 2 2017.06

Language：English Publishing type：Research paper (international conference proceedings) Publisher：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.

DOI： 10.1109/LANMAN.2017.7972154

Study on MPTCP Enhancement by IP Routing for WebQoE Improvement Reviewed International journal

Yasuomi Muraki, Yoshihiro Ito, Kasumi Tashiro

Proceedings of 2017 International Conference on Platform Technology and Service (PlatCon) 1 - 4 2017.02

Language：English Publishing type：Research paper (other academic) Publisher：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.

DOI： 10.1109/PlatCon.2017.7883729

Proposal and Evaluation of Mechanism for Selecting Low-Latency Route through Relay Router under IPv4/v6 Coexistence Environment Reviewed

Tomohiko Mizoguchi, Yoshihro Ito

IEICE Transactions on Communicaiotns (Japanese Edition) J99-B ( 12 ) 1 - 9 2016.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：IEICE

DOI： 10.14923/transcomj.2016JBP3029

Study on New TCP Congestion Control for Low QoS Fluctuation Based on Quality of Experience for Web Services Reviewed

Masaki Shibata, Yoshihiro Ito

IEEJ Transactions on Electronics, Information and Systems 136 ( 12 ) 1 - 7 2016.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：IEE

DOI： 10.1541/ieejeiss.136.1

Study of the Effect of the Mean and Standard Deviation of Response Time on QoE in Web Services Reviewed International journal

Maya Tabuchi, Yoshihiro Ito

Proceedings of ICTC 2016 637 - 639 2016.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：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 Reviewed International journal

YeongJoo Kim, Yoshihiro Ito

Proceedings of ICTC 2016 267 - 269 2016.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：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 Reviewed International journal

Kaori Iwata, Yoshihiro Ito

Proceedings of ICTC 2016 646 - 648 2016.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：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 Reviewed International journal

Yuuna Adachi, Yoshihiro Ito

Proceedings of ICTC 2016 637 - 639 2016.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：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 Reviewed International journal

Shiho Asano, Yoshihiro Ito

Proceedings of IEICE APNOMS 2016 2016.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：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.

Effect of Communication Quality Degradation on Web Usability over 6to4 Networks Reviewed

Tomohiko Mizoguchi,Yoshihiro Ito,Ryo Koyashiki

IEEJ Transactions on Electronics, Information and Systems 136 ( 4 ) 493 - 501 2016.04

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：IEEJ

DOI： 10.1541/ieejeiss.136.493

Study on Appropriate TCP Congestion Control for WebQoE Improvement Reviewed

Masaaki Shibata,Yoshihiro Ito

Proceedings of IEICE Workshop on Internet Architecture and Applications 141 - 145 2015.11

Language：English Publishing type：Research paper (international conference proceedings) Publisher：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 Reviewed International journal

Tomohiko Mizoguchi,Yoshihiro Ito

Proceedings of 2015 International Conference on Information and Communication Technology Convergence (ICTC) 576 - 578 2015.10

Language：English Publishing type：Research paper (international conference proceedings)

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.

DOI： 10.1109/ICTC.2015.7354614

Development of Wireless LAN Base Station with Web-QoE Based QoS Control Reviewed International journal

Shiho Asano,Yoshihiro Ito

Proceedings of 2015 International Conference on Information and Communication Technology Convergence (ICTC) 5 - 7 2015.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：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.

DOI： 0.1109/ICTC.2015.7354481

Study on effect of congestion control of multipath TCP on Web-QoE Reviewed International journal

Yasuomi Muraki,Yoshihiro Ito

Proceedings of 2015 IEEE 4th Global Conference on Consumer Electronics (GCCE) 52 - 53 2015.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：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.

DOI： 10.1109/GCCE.2015.7398634

Study of Web Service Estimation Using Only Ethernet Frame Header or IP Packet Header Reviewed International journal

Daichi Sugita,Yoshihiro Ito

Proceedings of 2015 IEEE 4th Global Conference on Consumer Electronics (GCCE) 93 - 94 2015.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：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.

DOI： 10.1109/GCCE.2015.7398648

Effect of QoS degradation on Parallax Effect in Web Services Reviewed International journal

Yuna Adachi, Yoshihiro Ito

Proceedings of 2015 IEEE 4th Global Conference on Consumer Electronics (GCCE) 1 - 2 2015.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：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.

DOI： 10.1109/GCCE.2015.7398639

Assessment of Sense of Presence for 3D IP Phone Service Under Actual Environments Reviewed International journal

Minoru Tsubota,Yoshihiro Ito

Proceedings of 2015 IEEE 4th Global Conference on Consumer Electronics (GCCE) 3 - 4 2015.10

Language：English Publishing type：Research paper (international conference proceedings) Publisher：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.

DOI： 10.1109/GCCE.2015.7398650

A Method of Evaluating Effect of QoS Degradation on Multidimensional QoE of Web Service with ISO - based Usability Reviewed

Daisuke Yamauchi, Yoshihiro Ito

International Journal of Computer Networks & Communications 7 ( 1 ) 19 - 33 2015.01

Language：English Publishing type：Research paper (scientific journal)

DOI： 10.5121/ijcnc.2015.7102

A Method of QoE Management in Online Shopping Web Services with TCP Variables Reviewed International journal

Daisuke Yamauchi, Yoshihiro Ito,Toru Tahara

Internetworking Indonesia Journal 2015.01

Language：English Publishing type：Research paper (scientific journal) Publisher：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 Reviewed

Masaki Shibata, Yoshihiro Ito, Ryosuke Koshimura

Proceedings of 2014 International Conference on Information and Communication Technology Convergence 77 - 81 2014.10

Language：English Publishing type：Research paper (international conference proceedings)

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.

DOI： 10.1109/ICTC.2014.6983087

Evaluation of Relationship between QoS and QoE for Web Services Considering the Hierarchical Structure with Principal Component Analysis and Path Analysis Reviewed

Ryosuke Koshimura, Yoshihiro Ito

Proceedings of 2014 20th Asia-Pacific Conference on Communications 100 - 105 2014.10

Language：English Publishing type：Research paper (international conference proceedings)

Assessment of VoIP phone service with binaural 3D audio for multiple sound sources Reviewed

Minoru Tsubota, Yoshihiro Ito, Ryo Murakami

Proceedings of 2014 IEEE 3rd Global Conference on Consumer Electronics 660 - 661 2014.10

Language：English Publishing type：Research paper (international conference proceedings)

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.

DOI： 10.1109/GCCE.2014.7031129

Assessment of sense of presence for 3D IP phone service Reviewed

Ryo Murakami, Yoshihiro Ito

Proceedings of 2014 IEEE 3rd Global Conference on Consumer Electronic 567 - 570 2014.10

Language：English Publishing type：Research paper (international conference proceedings)

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.

DOI： 10.1109/GCCE.2014.7031212

A study of effect of MPTCP on Web usability Reviewed

Daisuke Yamauchi, Yoshihiro Ito

Proceedings of 2014 IEEE 3rd Global Conference on Consumer Electronic 12 - 15 2014.10

Language：English Publishing type：Research paper (international conference proceedings)

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.

DOI： 10.1109/GCCE.2014.7031214

Empirical Study on Clarification of Relationship Between QoS and QoE for Web Services by Path Analysis Reviewed

Ryosuke Koshimura, Yoshihiro Ito

Proceedings of 2014 IEEE 3rd Global Conference on Consumer Electronics 10 - 11 2014.10

Language：English Publishing type：Research paper (international conference proceedings)

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.

DOI： 10.1109/GCCE.2014.7031220

Effect of QoS Degradation Caused by 6to4 and IPsec on QoE for Web Services Reviewed

Tomohiko Mizoguchi, Yoshihiro Ito

Proceedings of 2014 IEEE 3rd Global Conference on Consumer Electronics 5 - 9 2014.10

Language：English Publishing type：Research paper (international conference proceedings)

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.

DOI： 10.1109/GCCE.2014.7031121

Study of necessary number of simultaneous TCP connections in Web client by Web-QoE assessment Reviewed

Daisuke Yamauchi, Yoshihiro Ito

Proceedings of 2013 International Conference on ICT Convergence 234 - 237 2013.10

Language：English Publishing type：Research paper (international conference proceedings)

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.

DOI： 10.1109/ICTC.2013.6675347

Development of Web-QoE evaluation system for wireless LAN with combination of simulator and network emulator Reviewed

Ryosuke Koshimura, Yoshihiro Ito

Proceedings of 2013 IEEE 2nd Global Conference on Consumer Electronics 431 - 432 2013.10

Language：English Publishing type：Research paper (international conference proceedings)

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.

DOI： 10.1109/GCCE.2013.6664879

Assessment of sound source localization and subjective quality for VoIP phone service with binaural 3D audio Reviewed

Ryo Murakami, Yoshihiro Ito

Proceedings of 2013 IEEE 2nd Global Conference on Consumer Electronics 142 - 146 2013.10

Language：English Publishing type：Research paper (international conference proceedings)

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.

DOI： 10.1109/GCCE.2013.6664777

Evaluation of relationship between network performance and Web usability considering the hierarchical structure of the QoS with path analysis Reviewed

Yosuke Nomura, Yoshihiro Ito

Proceedings of 2013 IEEE 2nd Global Conference on Consumer Electronics 518 - 519 2013.10

Language：English Publishing type：Research paper (international conference proceedings)

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.

DOI： 10.1109/GCCE.2013.6664908

Effect of network performance degradation on web usability over 6to4 networks Reviewed

Ryo Koyashiki, Yoshihiro Ito

Proceedings of 2013 IEEE 2nd Global Conference on Consumer Electronics 516 - 517 2013.10

Language：English Publishing type：Research paper (international conference proceedings)

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.

DOI： 10.1109/GCCE.2013.6664907

Evaluation of Effect of IP Performance Degradation on QoE-Web of Online Shopping Service Reviewed

Yosuke Nomura, Yoshihiro Ito

Proceedings of IEICE 2013 International Workshop on Smart Info-Media Systems in Asia 172 - 176 2013.09

Language：English Publishing type：Research paper (international conference proceedings)

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 Reviewed

Yoshihiro Ito, Yosuke Nomura

Proceedings of IEEE The 9th Asia-Pacific Conference on Communicaitons 404 - 408 2013.08

Authorship：Lead author Language：English Publishing type：Research paper (international conference proceedings)

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 Reviewed

Yoshihiro Ito, Toru Tahara, Susumu Kuroyanagi

Proc. 2012 IIAI International Conference on Advanced Applied Informatics 357 - 361 2012.09

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

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.

DOI： 10.1109/IIAI-AAI.2012.65

Study on Effect of IP Performance Degradation on Web Usability with the Severity Rating Reviewed

Yoshihiro Ito, Hiroyuki Haga

Proc. APCHI'12 2 767 - 768 2012.08

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

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 Reviewed

Yoshihiro Ito, Tohru Tahara

Proc. IEEE/IPSJ SAINT 2011 Workshop C3NET 2011 469 - 473 2011.07

Authorship：Lead author Language：English Publishing type：Research paper (international conference proceedings)

Calculation of necessary QoS for user satisfaction with a QoS mapping matrix Reviewed

Yoshihiro Ito

Proceedings of the 2010 10th IEEE/IPSJ International Symposium on Application and the Internet 1 ( 1 ) 233 - 236 2010.07

Authorship：Lead author Language：English Publishing type：Research paper (international conference proceedings)

DOI： 10.1109/SAINT.2010.95

Feasibility of QoS control based n QoS mapping over IP networks "jointly worked" Reviewed

Y. Ito, S. Tasaka

Elsevier Computer Commnications 31 ( 10 ) 2589 - 2595 2008.06

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

Tradeoff relationship between fedelity and latency in interactive audio-video applicaitons over IP networks "jointly worked" Reviewed

Y. Ito S. Tasaka

IEICE Transactions on Communications E90-B ( 5 ) 1112 - 1121 2007.05

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

User-level QoS assessment of a multipoint-to-multipoint TV conferencing application over IP networks "jointly worked" Reviewed

Y. Ito, S. Tasaka

Proceedings of the 5th IEEE/IFIP Workshop on End-to-End Monitoring Techniques and Sevices (E2EMON2007) 1 - 8 2007.05

Authorship：Lead author Language：English Publishing type：Research paper (international conference proceedings)

Enhancement of user-level QoS in audio-video IP transmission by utilizing the mutually compensatory property "jointly worked" Reviewed

S. Tasaka, J. Sako, Y. Ito

Conference Record of IEEE Global Telecommunicaitons Conference (GLOBECOM2006) MMC02-1 2006.11

Language：English Publishing type：Research paper (international conference proceedings)

A method of user-level QoS guarantee by session controll in audio-video tranmission ove IP networks "jointly worked" Reviewed

S. Tasaka, Y. Ito, Y. Yamada, J. Sako

Conference Record of IEEE Global Telecommunications Conference (GLOBECOM2006) GRP08-2 2006.11

Language：English Publishing type：Research paper (international conference proceedings)

User-level QoS assessment of a multipoint-to-multipoint TV conferencing applications over IP networks "jointly worked" Reviewed

Y. Ito, S. Tasaka

COnference Record of IEEE Global Telecommunications Conference (GLOBECOM2006) QRP08-2 2006.11

Language：English Publishing type：Research paper (international conference proceedings)

Feasibility of QoS control based on QoS mapping in audio-video transmission over IEEE 802.11 wireless LAN "jointly worked" Reviewed

Y. Ito, S. Tasaka

Conference Record of IEEE International Conference on Communications (ICC2006) 2 5097 - 5102 2006.06

Authorship：Lead author Language：English Publishing type：Research paper (international conference proceedings)

Real-time estimation of user-level QoS of audio-video transmission over IP networksn "jointly worked" Reviewed

S. Tasaka, Y. Ito

Comference Record of IEEE International Conference on Communications (ICC2006) 2 884 - 890 2006.06

Language：English Publishing type：Research paper (international conference proceedings)

Continuous time assessment and mapping of user-level QoS in audio-video transmission over IP networks "jointly worked" Reviewed

Y. Ito, S. Tasaka, R. Ito

Proceedings of IASTED Communications and Computer Networks (CCN2005) 230 - 237 2005.10

Authorship：Lead author Language：English Publishing type：Research paper (international conference proceedings)

Effect of monitor size on user-level QoS of audio-video transmission over IP networks in ubiquitous environment "jointly worked" Reviewed

Y. Ito, S. Tasaka

Proceedings of IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC2005) 2005.09

Authorship：Lead author Language：English Publishing type：Research paper (international conference proceedings)

Quantitative assessment of user-level QoS and its mapping "jointly worked" Reviewed

Y.Ito, S. Tasaka

IEEE Trans. Multimedia 7 ( 3 ) 572 - 584 2005.06

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

Multidimensional assessment of user-level QoS for audio-video transmission over IP networks "jointly worked" Reviewed

Y. Ito, S. Tasaka

J88-B ( 3 ) 689 - 702 2005.03

Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)

Psychometric analysis of the effect of the buffering delay on user-level QoS in an interactive audio-visual application "jointly worked" Reviewed

Y. Ito, S. Tasaka, Y. Fukuta

Proc. ACM Workshop on Next-Generation Residential Broadband Challenges 2 - 10 2004.10

Authorship：Lead author Language：English Publishing type：Research paper (international conference proceedings)

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 2004.06

Authorship：Lead author Language：English Publishing type：Research paper (international conference proceedings)

User-level QoS assessment with psychometric methods and QoS mapping "jointly worked" Reviewed

Y. Ito, S. Tasaka

Proceedings of International Conference on Computer, Communication and Control Technologies (CCCT'03) 3 127 - 131 2003.07

Authorship：Lead author Language：English Publishing type：Research paper (international conference proceedings)

Psychometric analysis of the mutually compensatory property of multimedia QoS "jointly worked" Reviewed

S. Tasaka, Y. Ito

Conf. Rec. IEEE ICC2003 1880 - 1886 2003.05

Language：English Publishing type：Research paper (international conference proceedings)

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 Reviewed

伊藤嘉浩, 田坂修二

電子情報通信学会論文誌 J86-B ( 3 ) 485 - 498 2003.03

Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)

Variably Weighted Round Robin Queueing for Core IP Routers Reviewed

Proceedings of IEEE International Performance, Computing, and Communications Conference (IPCCC 2002) 159 - 166 2002.04

Authorship：Lead author Language：English Publishing type：Research paper (international conference proceedings)

Comparison of Multi-Window and SACK TCP over Wireless Links Reviewed

IEICE Transaction of Communications E84-B ( 11 ) 614 - 617 2001.09

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

A proposal for pseudo-traffic model for IP network evaluation Reviewed

Proceedings of the Internet Workshop 2001 (IWS'2001) 127 - 132 2001.02

Authorship：Lead author Language：English Publishing type：Research paper (international conference proceedings)

Development of the flexible and general IP evaluation tool STAGE Reviewed

IEICE Transactions on Information and Systems E83-D ( 5 ) 1003 - 1011 2000.05

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

Rate-adaptive real-time multicast TV conference system with locally adaptive packet flow control

IEICE Transactions on Information and Systems E82-D ( 4 ) 815 - 821 1999.04

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

A traffic measurement tool for IP-based networks Reviewed

IEICE Transactions on Information and Systems E82-D ( 4 ) 756 - 761 1999.04

Language：English Publishing type：Research paper (scientific journal)

A method of service quality estimation with a network measurement tool Reviewed

Proceedings of 18th IEEE International Performance, Computing, and Communications Conference (IPCCC 1999) 201 - 209 1999.02

Language：English Publishing type：Research paper (international conference proceedings)

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） Reviewed

前島治, 伊藤嘉浩, 石倉雅巳, 浅見徹

Proceedings of Internet Conference '98 1998.12

Language：Japanese Publishing type：Research paper (other academic)

A Wide-band IP tunneling router with resource reservation Reviewed

Proceedings of the Internet Workshop '98 (IWS'98) 128 - 134 1998.03

Authorship：Lead author Language：English Publishing type：Research paper (international conference proceedings)

Bandwidth-guaranteed IP tunneling router with RSVP "jointly worked" Reviewed

Y. Ito, M. Ishikura O. Maeshim, T. Asami

Proceedings of IEEE International Performance, Computing, and Communications Conference (IPCCC 1998) 291 - 29７ 1998.02

Authorship：Lead author Language：English Publishing type：Research paper (international conference proceedings)

Multi connection TCP mechanism for high performance transport in an ATM network "jointly worked" Reviewed

M. Ishikura, Y. Ito, K. Yamazaki, T. Asami

Proceedings of the International IFIP-IEEE Conference on Broadband communications’96 443 - 454 1996.04

Language：English Publishing type：Research paper (international conference proceedings)

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.

Physical Distance Measure that Simulates Human Visual Perception for 3D Objects "jointly worked" Reviewed

Y. Ito, Y. Sto

IEICE Transactions on Information and Systems J76-D-II ( 8 ) 1604 - 1611 1993.08

Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)

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