Collaborative Research: Exploring Architectures and Algorithms for Optical Networks

未来的网络有望为各种应用的通信需求提供解决方案。提出的研究目标是解决与未来光网络设计相关的问题。特别是，设计可伸缩的体系结构和算法来有效地管理、控制和交付所需的服务级别是主要目标。该方案基于使用光纤技术、波分复用、波长转换和波长共享。目标是开发支持源、目标和网络之间契约的解决方案，并允许为用户应用程序使用千兆带宽。该方案基于在多个用户之间共享有限数量的波长，利用网络中有限的波长转换能力，以及使用多光纤链路通过为每个连接分配专用资源来支持单个用户的无丢失和无冲突通信。具体而言，将解决以下研究问题。将确定可用的WDM技术、波长共享、波长转换、多光纤链路和用户需求所支持的可分配资源的最小粒度之间的平衡。利用这些信息库，将开发出有效利用网络资源的资源分配策略的新架构和相应算法。架构解决方案将包括备用容量，以容忍单光纤故障。当采用波长共享时，不同的源可以以受控的方式传输，从而使它们达到平均速率。然而，根据共享机制，延迟可能是一个重要因素。最小化会话阻塞概率和数据传递中的延迟是设置会话请求的主要问题。这项建议的目的之一是为这个问题找到有效的解决办法。将开发和评估在设置端到端请求时最小化这两个指标的分布式路由算法。所提出的研究结果有望在使用基于wdm的全光技术方面取得重大进展。解决所提出问题的最初方法是使用分析模型和模拟来评估所提出的体系结构。初步研究的结果将用于开发替代架构和复杂的路由算法。

Future networks are expected to offer solutions for the communication needs of a wide variety of applications. The goals of the proposed research are to address the issues related to the design of future optical networks. In particular, the design of scalable architectures and algorithms to manage, control, and deliver the required level of service efficiently is the primary goal. The proposal is based on the use of optical fiber technology, wavelength division multiplexing, wavelength conversion, and wavelength sharing. The objective is to develop solutions that will support a contract between source, destination, and network, and allow the use of gigabit bandwidths for user applications. The proposal is based on the sharing of a limited number of wavelengths among multiple users, the utilization of limited wavelength conversion capability in the network, and the use of multi-fiber links to support loss- and conflict-free communication for individual users by allocating dedicated resources to each connection. Specifically, the following research issues will be addressed. The balance between the minimum granularity of allocatable resources that can be supported by the available technology of WDM, wavelength sharing, wavelength conversion, multi-fiber links, and user needs will be indentified. Using this information base, new architectures and corresponding algorithms for resource allocation policies that efficiently utilize network resources will be developed. The architectural solutions will include spare capacity to tolerate single-fiber failures. When wavelength sharing is employed, different sources may transmit in a controlled manner such that they achieve their average rates. However, depending on the sharing mechanism, delay may be an important factor. Minimizing session blocking probabilities and delays in data delivery are the main issues in setting up session requests. An aim of this proposal is to develop effective solutions for this problem. Distributed routing algorithms that minimize both of these metrics in setting up an end-to-end request will be developed and evaluated. The results of the proposed research are expected to make significant advances towards the use of WDM-based all-optical technology. The initial approach to solve the proposed problems is to evaluate the proposed architectures using analytical models and simulations. The results of the initial studies will be used in developing alternative architectures and sophisticated routing algorithms.