专业英语翻译
Time-aware admission control on top of time-unaware
network infrastructures
Abstract
Users conceive advance negotiation as the most natural way to subscribe to a service with quality guarantees. Regrettably, the existing
network infrastructures are unable to process requests involving time as a Quality of Service parameter. Rather than designing a new
integrated approach to time-aware resource management, in this paper we show how to build time-aware admission control on top of existing
time-unaware solutions. Reuse of current achievements in the field of admission control is made possible by exploiting the orthogonality,
which exists between the time dimension and the resource plane. Decomposition of functions and separation of concerns are the key aspects
of our algorithm. The approach and the algorithm are presented in a formal way, and then analysed by means of practical examples. A
scalability analysis is also conducted, which helps set the limits of applicability of our approach.
q 2004 Elsevier B.V. All rights reserved.
1. Rationale and approach
In the last years, growing attention has been paid to
enabling the Internet to support explicit negotiation of
services with a specified level of quality. The design of
architectures capable of addressing this issue poses several
challenges, which can be grouped in two categories: those
pertaining to the field of network management, and those
more specifically related to service negotiation.
From the network management standpoint, the main
concern is how to define an effective mechanism for
providing packet delivery guarantees. The original besteffort
Internet behavior no longer meets the requirements
imposed by the ever increasing number of heterogeneous
applications running over the network. Different and
complementary approaches to network management have
been proposed in Quality of Service and Traffic Engineering
research areas. Quality of Service relies on classification,discrimination, and scheduling of packets inside individual
network nodes. Traffic engineering aims at better exploiting
the available resources by controlling the routing of packets
within the network. The joint adoption of these two
approaches favors network resource optimization.
参考答案:通过没有时间意识的互联网实现对时间有意识的控制
摘要
客户认为取得有质量的服务最正常的途径是通过事先的交易谈判.很遗憾,现有的网络条件不能满足人们要取得高质量服务对时间的要求.本文将说明怎样通过没有时间意识的互联网实现对时间有意识的控制,而不是设计一套新的完整的方法来实现对时间有意识的管理.通过对时间和资源的结合进行开发,人们对时间控制领域现已取得的成绩进行重新利用才成为可能.我们法则的两个重点是分解功能和转移顾虑.首先,我们正式提出方法和法则;然后,举出具体例子对其分析.同时也进行了可测量性的分析,这个分析说明了方法的适用范围.
1.基本原理和方法
近几年来,人们越来越关注如何通过互联网的帮助进行谈判以实现一定质量的服务交易.为解决这一问题而设计机构体系时遇到了很多的挑战,这些挑战主要分为两类:网络管理方面的和具体的交易谈判方面的.从网络管理方面来看,主要问题是怎样建立一个有效的机构来保障数据包的传送.互联网的最大能力已不再能满足来自网络日益增长的种类繁多的申请要求.人们从服务质量和通讯工程两个方面对互联网的管理提出了不同和补充的方法.服务质量取决于对网络中数据包的分类区别和安排.而通讯工程则依赖于通过对网络内数据包传输路线的控制以很好地开发现有资源.这两种方法的结合有助于实现网络资源的优化.