IP VPN的拓扑抽象服务：基于资源共享的核心网划分
Topology Abstraction Service for IP VPNs: Core Network Partitioning for Resource Sharing
摘要：
VPN服务提供商（VSP）和IP-VPN客户传统上在其路由和信令实体之间维持服务分界边界。这导致VPN将VSP网络视为不透明的实体，因此限制了VSP和VPN之间的任何有意义的交互。一个关键的挑战是通过一个既准确又公平的抽象（TA）[1]将每个VPN暴露给有关可用网络资源的信息。在[2]中，我们提出了三种分散的方案，假设所有执行抽象的边界节点都可以访问整个核心网络拓扑。这种假设可能会导致超额或认购不足。在本文中，我们开发了集中式方案来划分核心网络容量，并将每个分区分配给特定的VPN，以应用[2]中提出的分散式抽象方案。首先，我们提出了两个计划的基础上的最大并发流和最大多商品流（MMCF）配方。然后，我们提出的方法来解决的公平性问题时出现的MMCF制定使用。我们目前的结果的基础上广泛的模拟几种拓扑结构，并提供了一个比较评估的不同方案的抽象效率，公平性VPN和呼叫性能特性实现。
英文摘要：
VPN service providers (VSP) and IP-VPN customers have traditionally maintained service demarcation boundaries between their routing and signaling entities. This has resulted in the VPNs viewing the VSP network as an opaque entity and therefore limiting any meaningful interaction between the VSP and the VPNs. A key challenge is to expose each VPN to information about available network resources through an abstraction (TA) [1] which is both accurate and fair. In [2] we proposed three decentralized schemes assuming that all the border nodes performing the abstraction have access to the entire core network topology. This assumption likely leads to over- or under-subscription. In this paper we develop centralized schemes to partition the core network capacities, and assign each partition to a specific VPN for applying the decentralized abstraction schemes presented in [2]. First, we present two schemes based on the maximum concurrent flow and the maximum multicommodity flow (MMCF) formulations. We then propose approaches to address the fairness concerns that arise when MMCF formulation is used. We present results based on extensive simulations on several topologies, and provide a comparative evaluation of the different schemes in terms of abstraction efficiency, fairness to VPNs and call performance characteristics achieved.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
