NeTS-NR: Next Generation Protocol Design Using Quantitative Methods

该项目正在设计新的应用程序和网络传输协议，以及改进的工作负载特征和评估协议的模型。在工作负载表征领域，该项目正在评估和扩展一种新的网络流量表征方法，称为贝叶斯块(BB)分析，该方法比以前用于估计突发事件过程的时变率的方法要精确得多，例如网络流中的分组丢失、到达网络中的网关或终端主机的分组或流、或者到达网络服务的请求。预期结果包括：(A)更精确和准确地描述这些网络事件过程；(B)更精确和现实的网络流量综合工作量模型；(C)扩展BB分析方法以提高其准确性。该项目还在研究更精确和准确的对等工作负载特征，以用于改进的对等应用程序的设计。在协议设计领域，该项目正在研究(A)来自多个(对等)服务器的新的近乎最佳的下载协议，以及(B)新传输协议的探索性设计。新的传输协议使用前向纠错来从分组丢失中恢复，并且在接收器处使用BB分析来确定何时向发送器发送关于观察到的分组丢失率的反馈，以用于调节将分组发送到接收器的速率。

This project is designing new application and network transport protocols as well as improved workload characterizations and models for evaluating the protocols. In the domain of workload characterization, the project is evaluating and extending a new method for network traffic characterization called Bayesian Block (BB) analysis that is significantly more accurate than previous methods for estimating the time-varying rate of bursty event processes, such as packet losses in a network flow, packet or flow arrivals to a gateway or end host in the network, or requests arriving to a network service. Anticipated results include (a) more precise and accurate characterizations of these network event processes, (b) more precise and realistic synthetic workload models for network flows, and (c) extensions to the BB analysis method to improve its accuracy. The project is also investigating more precise and accurate peer-to-peer workload characterizations that can be used in the design of improved peer-to-peer applications. In the domain of protocol design, the project is investigating (a) new near-optimal download protocols from multiple (peer-to-peer) servers, and (b) exploratory design of new transport protocols. The new transport protocols employ forward error correction to recover from packet loss as well as BB analysis at the receiver to determine when to send feedback to the sender regarding observed packet loss rate for use in regulating the rate the packets are sent to the receiver.