网格应用中面向服务的层1虚拟专用网

为了满足网格应用的需要,新的网络概念正在出现,在这种网络中,用户能够驱动自己的虚拟网络拓扑结构。介绍了网格应用中面向服务的层1虚拟专用网(VPN),层1VPN的建立是将一个物理网络进行划分,根据开放网格服务体系,这些划分作为网络资源以服务的形式提供给网格应用。首先介绍"光路"的基本概念,并假设"光路"作为光网络划分的基本单元,然后探讨了怎样将一个光路封装为Web服务,列举了光路Web服务(LP-WS)应当支持的主要的操作,这些操作包括:串联、分割等等。讨论了商业过程中的LP-WS,这些商业机构包含在一个相互协作的网格项目中,并且这些机构需要从光载波网络中获得一个LP-WS池,然后将这些LP-WS和具有特殊约束的Web服务集成在一个工作流中。

Service-oriented layer 1 virtual private network for grid applications

A new network concept is now emerging to satisfy Grid application requirements.This is a network where the user will drive its own virtual network topology.In this paper,service-oriented Layer 1 virtual private network(L1 VPN) for Grid applications is introduced.Layer 1 VPNs are created by dividing a physical network into partitions.According to the Open Grid Service Architecture(OGSA),these partitions can be viewed as "network resources" to be offered as services to the Grid application.First,we introduce the concept of fundamental lightpath,and propose that a fundamental lightpath be taken as the basic unit of optical network partitions.We then explore how a lightpath can be encapsulated as a web service and enlist the key web service operations a Lightpath Web Service(LP-WS) should support.Furthermore,we discuss the LP-WS in the context of a business process,where institutions involved in a collaborative Grid project acquire a pool of LP-WSs from optical carrier networks,and then integrate these LP-WSs with discipline-specific web services into a workflow.