文章基本信息

标题：An Efficient and QoS Guaranteed Network Architecture for Real-Time Premium Traffic over the Internet
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作者：Manodha Gamage
期刊名称：Computer Sciences and Telecommunications
印刷版ISSN：1512-1232
出版年度：2005
期号：03
页码：3-15
出版社：Internet Academy
摘要：The QoS provided by today’s best effort Internet is not good enough for real-time premium traffic (PT). It is believed that QoS guarantees could be better provided by the connection oriented networks such as MPLS. However, these connection oriented networks are inherently more prone to network failures. Failures of connection oriented networks can be broadly classified into two types namely: link/path failures and degraded failures. Degraded failures that account for about 50% of total failures are mostly detected by control plane timers. The control plane and the data plane of connection oriented networks such as MPLS are logically separated and therefore a failure in the control plane should not always disconnect the communications in the data plane. The Virtual Path Hopping (VPH) concept in this study distinguishes these two types of failures and avoids the disconnections of communications in the data plane due to degraded failures. The computer simulations performed and the results are presented to support the concept. The Dynamic Virtual Path Allocation (DVPA) algorithm to improve the availability of the connection oriented backbone networks without compromising the network resource utilization efficiency is also discussed here. DVPA is to achieve very fast re-routing for link/path failures. Therefore the connection oriented architecture with VPH and DVPA could provide QoS guarantees and high availability for real-time applications over the Internet.
关键词：Virtual Path Hopping, Dynamic Virtual Path Allocation, Multi Protocol Label Switching, premium traffic, QoS, connection oriented networks, real-time, degraded failures, link/path failures