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008			070212s2005 th uu|m rtt 0| a1eng d
035			_a.b12006634
099		9	_aAIT Diss. no.CS-05-05
100	0		_aTippyarat Tansupasiri
245	1	0	_aActive networks technology and dynamic QoS
260			_aPathum Thani, Thailand : _bAsian Institute of Technology, _c2005
300			_a83 p. : _bill.
490	1		_aDissertation ; _vno. CS-05-05
500			_aA dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Technical Science, Schoool of Advanced Technologies
502			_aThesis (Ph.D.) - Asian Institute of Technology, 2005
520			_aThe Internet has been known to be a best-effort network that offers no provision for reliable data transfer or delivery time. Some Internet applications, however, have specific requirements for their transmission and demand a better quality of service (QoS) from the network. This study proposes a dynamic QoS, or D-QoS, model on IP networks where QoS settings can be automatically reconfigured based on the concept of active networks. The system allows authorized users to request network interruptions that allow their privileged flows to be optimally transmitted at the expense of other existing traffic. The requests are carried in the program part of each active packet and instruct each D-QoS node traversed to adjust the QoS settings for the interruption. At the completion of the privileged flow transmission, the network resumes its services for the flows that had been interrupted. Different levels of privilege can be granted to authorized users enabling multi-level interruption on D-QoS nodes, where a number of privileged flows can coexist. The D-QoS model can be incrementally deployed. A network administrator may consider positioning D-QoS nodes to ensure the transmission quality of the privileged flows initially at the links where bandwidth is tight, the bottleneck links. More D-QoS nodes may be added, at a later stage, to guarantee the flow performance along the transmission path. In this dissertation, the design of D-QoS with the proposed interruption mechanism and the QoS reconfiguration scheme are explained. The functions and the performance of the model are evaluated through experiments on a small prototype, and through simulations. The model has been shown to be able to dynamically adjust the network QoS configuration according to the requests of authorized users and to offer assurance for privileged flows with improved network utilization.
650		0	_aComputer networks
700	0		_aKanchana Kanchanasut, _eChairperson
700	0		_aVoratas Kachitvichyanukul, _eExamination Committee
700	0		_aTeerapat Sanguankotchakorn, _eExamination Committee
700	1		_aErkc, Tapio, _eExamination committee
710	2		_aRoyal Thai Government, _eScholarship donor
810	2		_aAsian Institute of Technology. _tDissertations ; _vno. CS-05-05
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B00278
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