2005 Fiscal Year Final Research Report Summary
Studies on the mechanisms of traffic management and control required for the deeper Internet
| Project/Area Number |
15200005
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Computer system/Network
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| Research Institution | Kyusyu Institute of Technology |
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Principal Investigator |
OIE Yuji Kyusyu Institute of Technology, Faculty of Computer Science & Systems Engineering, Professor, 情報工学部, 教授 (50167293)
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| Co-Investigator(Kenkyū-buntansha) |
KAWAHARA Kenji Kyusyu Institute of Technology, Faculty of Computer Science & Systems Engineering, Associate Professor, 情報工学部, 助教授 (40273859)
TSURU Masato Kyusyu Institute of Technology, Faculty of Computer Science & Systems Engineering, Associate Professor, 情報工学部, 助教授 (40231443)
IKENAGA Takeshi Kyusyu Institute of Technology, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (50284716)
KATO Manabu Ariake National College of Technology, Department of Electronics and Information Engineering, Associate Professor, 電子情報工学科, 助教授 (40270376)
HORI Yoshiaki Kyushu University, Graduate School of Information Science and Electrical Engineering, Associate Professor, 大学院・システム情報科学研究院, 助教授 (90264126)
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| Project Period (FY) |
2003 – 2005
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| Keywords | Network Tomography / Traffic Control / Multi-class QoS / Routing / Handover / Wireless LAN / Mobile Networks |
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| Research Abstract |
In this research, we have studied the mechanisms of traffic management and control required for the deeper Internet.
Research results are the following.
1)Fundamental studies on the network tomography to measure network characteristics :
As precise packet delay information is valuable for understanding network characteristics, methods of inferring delay-related information such as per-flow queuing delay statistics from partial measurements and per-link queuing delay variance from end-to-end path measurements have been developed. We also have shown the effectiveness of very precise time-stamp in network measurement.
2)Fundamental studies on multi-class QoS routing
With the increasing diversity of network applications, it has become crucial for the Internet to offer various services. We propose a distributed link state QoS routing with multiple routing tables obtained upon different link costs to effectively accommodate multi-class traffic. From our extensive simulation results, we found that
… More
the proposed scheme is successful in improving performance.
3)Fundamental studies on effective utilization of wireless resource on mobile networks
As for the mobile networks consisting of wireless LAN (WAN), we have proposed a decentralized access point selection architecture in order to use the wireless access resources effectively, and a dynamic gateway selection scheme for load balancing within wireless mesh networks. In addition, to achieve seamless handover between WLANs consisting of different IP subnets, a handover manager based on the number of frame retransmissions has been proposed. We have shown the effectiveness of these methods.
4)Fundamental studies on traffic control mechanisms in response to sudden traffic variations :
For improving queuing delay performance by traffic control, a method for dynamic assignment of traffic flows to multiple upper-paths by edge-routers based on traffic measurement and a method of proactively discarding packets by intermediate-routers based on the allowable delay limit enforced by the application characteristics have been developed. Less
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