A spare bandwidth sharing scheme based on network reliability
A spare bandwidth sharing scheme based on network reliability
复制标题
一种基于网络可靠性的闲置带宽共享方案
DOI：
10.1109/tr.2004.842532
复制
发表时间：
2005
影响因子：
5.9
通讯作者：
D. Sung
中科院分区：
文献类型：
--
作者：
Kyu;S. Nam;D. Sung
网络故障时，需要有空闲的带宽来恢复网络服务。然而，它降低了网络利用效率。通过在多个网络服务之间共享空闲带宽，可以显着减少空闲带宽需求。如果一组网络服务不同时受到网络故障的影响，则在网络元件上保留的备用带宽可以由一组网络服务共享以用于网络故障。本文提出了一种新的、更实用的基于网络可靠性的备用带宽共享方案。在所提出的方案中，在给定的链路故障率下允许多个链路故障，并且合理的恢复水平接近100%；而传统方案只考虑单条链路故障，恢复水平为100%。为了开发备用带宽共享方案，我们首先研究了评估基于路径的网络服务可靠性的框架，然后用路径寿命、恢复级别和备份链路可以保护的最大工作路径数量等决策参数来解释所提出的备用带宽共享方案。仿真结果表明，所提出的备用带宽共享方案比传统方案需要更小的备用带宽。
Spare bandwidth is required for recovering the network service from network faults. However, it degrades the efficiency of network utilization. Spare bandwidth demand can be reduced significantly by letting spare bandwidth be shared among several network services. Spare bandwidth reserved on a network element can be shared by a set of network services for a network fault if they are not simultaneously affected by the network fault. A new, and more practical spare bandwidth sharing scheme, which is based on the network reliability, is proposed in this paper. In the proposed scheme, multiple link failures are allowed with a given link failure rate, and a reasonable restoration level of near 100%; while in the conventional scheme, only a single link failure, and 100% restoration level are considered. To develop the spare bandwidth sharing scheme, we first investigate the framework for evaluating the reliability of path-based network services, and then we explain the proposed spare bandwidth sharing scheme with decision parameters such as lifetime of the path, restoration level, and the maximum number of working paths which can be protected by a backup link. Simulation results show that the proposed spare bandwidth sharing scheme requires a smaller amount of spare bandwidth than the conventional scheme.