|1.Research Institution||Kyoto University|
|2.Research Area||Physical and Engineering Sciences|
|3.Research Field||Intelligent and Dynamic Inter-networking|
|4.Term of Project||FY 1999 - FY 2003|
|6.Title of Project||Self-organizing Network Infrastructure|
|Name||Institution,Department||Title of Position|
|Yasuo, Okabe||Kyoto University, Academic Center for Computing and Media Studies||Professor|
|Names||Institution,Department||Title of Position|
|Motonori, Nakamura||Kyoto University , Academic Center for Computing and Media Studies||Associate Professor|
|Koji ,Okamura||Kyushu University, Computing and Communications Center||Associate Professor|
PPQ (Policed Priority Queuing) has been proposed as a framework for QoS (Quality of Service) guarantee at the network layer, and a router architecture which implements PPQ has been shown based on multi-stage token backet algorithm. A prototype of a hardware router implementation was designed as a joint work with Furukawa Electrics, and routers based on this are now shipped as commercial products.
A modification of TCP, the transport layer protocol, is proposed. In addition to the ordinally congestion control, the packet size is also dynamically changed with self-organizing mechanism. This improvement is drastically effective on IP over ATM networks.
A QoS unicast routing protocol HQLIP and a QoS multicast routing and resource reservation protocol SRSVP are proposed and implemented. These are already deployed on some commercial router products, e.g., Furukawa Electrics Fitel-G series. A suite of transport layer protocols for reliable multicast has been proposed and has been implemented as a general-purpose middleware.
A protocol for "zeroconf" autoconfiguration of IPv6 addresses is designed so that IPv6 can be used in a environment without any administrator like home network. A high-speed authentication and handover protocol is also developed for IPv6 mobile environment.
Theoretical analysis of the transient-loop problem on dynamic self-organizing routing is done and an algorithm for avoiding such situation is proposed. An algorithm for computing backup routing tables for shortest-path routing is presented.
In order to assure the effectiveness and performance of the proposed methods, prototype software is implemented and evaluated, e.g., the multimedia streaming suite EMON system, a high-density video transmission system, an Internet broadcasting system, an autoconfiguration system of home appliances. Some of them are evaluated in real environment, like, the TIDE project, a trans-Pacific distance learning between Kyoto University and UCLA, and the MIAKO.NET public wireless Internet service project.Okayama University, The Graduate School of Natural Science and Technology