ITR: Fast File Transfers Across Optical Circuit-Switched Networks

PI提出了一种称为动态可配置以太网/SONET上的以太网（DREEoS）的网络解决方案，以通过高速光电路实现端到端连接。在这个项目中考虑的主要应用是企业之间（B2B）以及企业和消费者之间（B2C）的大数据传输。DREEoS被提议作为主要互联网接入服务的附加服务。这可以通过为终端主机配备第二个（高速）以太网卡并将这些网卡连接到企业多服务配置平台（MSPP）上的端口来实现。广域SONET电路在企业MSPP之间动态建立，从终端主机到企业MSPP的以太网信号映射到这些广域电路。可以访问DREEoS服务的终端主机必须确定是否值得尝试DREEoS电路。 通过分析，它表明，如果（i）文件大小很大（ii）文件大小很小但往返时间（RTT）很大，以及（iii）文件大小和RTT都很小，那么对于大于某个交叉文件大小的文件，终端主机应首先尝试建立DREEoS电路。交叉文件大小和交叉RTT取决于TCP/IP路径上的丢包概率、链路速率、RTT和光路交换路径上的呼叫阻塞概率。在低负载时，网络可以在高呼叫阻塞概率下运行，以实现高利用率。随着负载的增加，网络可以被设计为保持高利用率，同时提供低呼叫阻塞概率。在该项目中，PI计划实施各种软件模块，例如用于触发电路设置的应用软件，允许终端主机发起传输以确定是否可以通过DREEoS电路到达其对应主机的光连接服务（OCS），允许高速传输的传输协议软件，并将这些模块集成起来，以演示跨PI的大学校园的高速文件传输。这项工作代表了我们目前对电路交换网络潜力的理解的重大进步。通过使用硬件加速的信令引擎，网络可以支持短保持时间的呼叫。这意味着应用程序可以利用电路交换网络的延迟优势，这对交互式应用程序至关重要，而不会影响利用率。这项工作将重新开启我们对电路交换网络的思考，使新的研究成为可能。举例来说，主要督察正考虑以电话接听/排程模式取代本建议所采用的电话阻塞模式。这将通过允许交换机的交错配置来消除传播延迟的影响，这一功能对于非常短的呼叫保持时间非常重要。这项工作在科学和工程领域有着明确的应用，在这些领域，远程合作需要在短时间内传输大量文件。我们的教育和多样性目标将通过工程和管理学院的学生（包括少数民族和妇女）的参与来实现。该项目的多学科性质将有助于我们的学生更好地为未来的工业工作做好准备。拟议研究的预期主要贡献包括：（i）传播我们的软件模块，这将有助于其他研究团队研究类似的光网络概念，（ii）通过我们的经济和市场分析，证明这种服务模式在商业部署中的可行性，及（iii）加强光线路交换网络的研究论文。

The PIs propose a network solution called Dynamically Reconfigurable Ethernet/Ethernet-over-SONET (DREEoS) to enable end-to-end connectivity through high-speed optical circuits. The primary application that is consider in this project is large data transfers between businesses (B2B), and between businesses and consumers (B2C). DREEoS is proposed as an add-on service to the primary Internet access service. This can be achieved by equipping end hosts with second (high-speed) Ethernet cards and connecting these cards to ports on an enterprise Multi-Service Provisioning Platform (MSPP). Wide-area SONET circuits areestablished dynamically between enterprise MSPPs and Ethernet signals from the end hosts to the enterprise MSPPs are mapped to these wide-area circuits. An end host with access to DREEoS service has to determine whether it is worthwhile attempting a DREEoS circuit or not. Through analysis, it showed that an end host should first attempt setting up a DREEoS circuit if (i) file sizes are large (ii) file sizes are small but round-trip times (RTT) are large and (iii) file sizes and RTT are small, then for files larger than some crossover file size. The crossover file size and crossover RTT depend upon the probability of packet loss on the TCP/IP path, link rates, RTT, and call blocking probability on the optical circuit-switched path. The availability of the fallback TCP/IP path allows DREEoS service to be introduced gradually into optical networks. At low loads, the network can be operated at high call blocking probabilities to achieve highutilization. As loads increase, the network can be engineered to retain high utilization while simultaneously offering low call blocking probabilities. In this project, the PIs plan to implement various softwaremodules, such as application software to trigger circuit setup, Optical Connectivity Service (OCS) to allow an end host initiating a transfer to determine whether its correspondent host can even be reached via aDREEoS circuit, transport protocol software to allow for high-speed transfers, and integrate these modules to demonstrate high-speed file transfers across the university campuses of the PIs.This work represents a significant advance in our current understanding of the potential of circuit-switched networks. By using hardware-accelerated signaling engines the network can support calls with short holding times. This means applications can exploit the delay benefits of circuit-switched networks, critical for interactive applications, without compromising utilization. This work will reopen our thinking on circuit-switched networks enabling new research. For example, the PIs are considering replacing the call blocking mode used in this proposal with a call queueing/scheduling mode. This will removethe impact of propagation delay by allowing for staggered configuration of switches, a feature that is important for very small call holding times. This work has a clear application in Science and Engineering, where distant collaborations require massive file transfers in short durations.Our educational and diversity goals will be met through the involvement of students, including minorities and women, from both engineering and management schools. The multidisciplinary nature of this project will help prepare our students better for future industrial jobs.The expected major contributions of the proposed research include (i) the dissemination of our software modules, which will be useful to other research teams working on similar optical network concepts, (ii)demonstrations of the viability of this service model for commercial deployment through our economic and market analysis, and (iii) research papers enhancing the role of optical circuit- switched networks.