Routing Reliability Guaranteed Connections in WDM Mesh Networks

Routing Reliability Guaranteed Connections in WDM Mesh Networks
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WDM 网状网络中的路由可靠性保证连接

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2008
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可靠性是波分复用(WDM)网络中的一个重要问题。为了适应连接请求,必须为连接请求计算活动路径(AP)。在单个AP不能满足可靠性要求的情况下,必须向连接请求分配某些备份资源,使得可以满足所需的可靠性。传统上,计算单个备份段来保护AP的一部分。然而,这种方法在某些情况下无法适应连接请求,即使有足够的资源来适应连接请求。在本文中,我们提出了一种新的算法,称为基于图形的启发式(AUGHT),有效地克服这一不足。在两个典型的mesh网络上进行了大量的仿真,结果表明了AGUHT算法的良好性能。索引词:波分复用(WDM),生存性,可靠性,网状网络。
Reliability has been widely recognized as an important issue in wavelength-division multiplexing (WDM) networks. In order to accommodate a connection request, an active path (AP) has to be computed for the connection request. In case of a single AP cannot meet the reliability requirement, certain backup resources have to be allocated to the connection request such that the required reliability can be met. Traditionally, a single backup segment is computed to protect a part of the AP. This approach, however, fails to accommodate a connection request in some cases, even if there are sufficient resources to accommodate the connection request. In this paper, we propose a novel algorithm, called auxiliary-graphbased heuristic (AUGHT) to efficiently overcome this deficiency. Extensive simulations conducted on two typical mesh networks demonstrate the good performance of the AGUHT algorithm. Index words: wavelength-division multiplexing (WDM), survivability, reliability, mesh networks.
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