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作者 Fritzsche, Brian Neal
書名 Access control and buffer management at the edge of the Internet for multimedia communications
國際標準書號 0496322229
book jacket
說明 258 p
附註 Source: Dissertation Abstracts International, Volume: 64-03, Section: B, page: 1396
Adviser: Mohammed Arozullah
Thesis (Ph.D.)--The Catholic University of America, 2003
The current Internet provides equal access to all users and utilizes a best effort delivery service. It does not provide quality of service (QoS) and hence does not handle multimedia services well. Recently, several protocols have been proposed (RSVP, MPLS, and DiffServ) to provide QoS-based differentiated services in the core of the Internet. Currently, these protocols do not provide intelligent access and user parameter controls that extend to the access nodes
This dissertation presents and evaluates an architecture and buffer management protocol for a typical access node of the Internet that will enable it to better handle multimedia services. The architecture of the access node consists of traffic controller, access controller, user parameter controller, and scheduler. This architecture reduces packet loss by over four times that of standard architectures. The buffer management protocol involves an Active Queue Management (AQM) algorithm that allocates buffer space to incoming traffic on a prioritized basis. The performance of AQM is compared with those of currently available buffer management algorithms including Random Early Detection (RED), Flow Random Early Detection (FRED), and Class Based Queueing (CBQ)
Moreover, the results obtained show that for the Poisson model the delay and loss remains reasonable for buffer occupancy rates up to 50% while for the self-similar model delay and loss increases excessively if the buffer occupancy rates are allowed to rise above 25%. The Poisson model leads designers to use large buffers and not emphasize buffer occupancy. However, when the self-similar model is used large buffers lead to excessively high delay. Thus, buffer size and buffer occupancy must be controlled. The AQM algorithm makes it possible to utilize smaller buffers and control occupancy rates in a way that is superior to the algorithms presently in use
Thus, this dissertation presents a new architecture and algorithm that can be deployed at the access nodes to provide end-to-end QoS to the Internet when DiffServ or MPLS are used in the core. Multimedia is becoming more and more prevalent in the Internet. Hence, the architecture and buffer management protocol developed here will make the Internet more useful to the user community
School code: 0043
DDC
Host Item Dissertation Abstracts International 64-03B
主題 Engineering, Electronics and Electrical
Computer Science
0544
0984
Alt Author The Catholic University of America
記錄 17 之 6058
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