Tag Archives: network

Stochastic Network Optimization with Application to Communication and Queueing Systems (Synthesis Lectures on Communication Networks)

This text presents a modern theory of analysis, control, and optimization for dynamic networks. Mathematical techniques of Lyapunov drift and Lyapunov optimization are developed and shown to enable constrained optimization of time averages in general stochastic systems. The focus is on communication and queueing systems, including wireless networks with time-varying channels, mobility, and randomly arriving traffic. A simple drift-plus-penalty framework is used to optimize time averages such as throughput, throughput-utility, power, and distortion. Explicit performance-delay tradeoffs are provided to illustrate the cost of approaching optimality. This theory is also applicable to problems in operations research and economics, where energy-efficient and profit-maximizing decisions must be made without knowing the future. Topics in the text include the following: – Queue stability theory – Backpressure, max-weight, and virtual queue methods – Primal-dual methods for non-convex stochas

Benefit Analysis of Optimization Models for Network Recovery Design: A Guide for Network Engineering

Network recovery is critical capability that service providers must provide. It can be accomplished in four ways. Span, or local, protection is the most common recovery method. Another common method is path restoration which is accomplished end-to-end. Some service providers apply both span protection and path restoration in different parts of their networks in a “hybrid” configuration. Another more recent alternative is a feature in Multiprotocol Label Switching (MPLS) called “Fast Reroute.” This praxis addresses several fundamental problems related to each of the above network recovery options in large service provider networks. First, the effects of the numbers of links, demand unit sizes, and link size modularity have on the four recovery methods, individually and collectively, are examined. Next, the selection of the minimum cost recovery method given the presence and levels of the other options is determined. Finally, the cost differences of the recovery methods given any

Network Performance and Optimization Guide: The Essential Network Performance Guide For CCNA, CCNP and CCIE Engineers (Design Series)

Network Performance and Optimization is an essential reference to network performance, optimization and capacity planning. This reference guide explains principles, methodologies and techniques used for high performance network design. The book starts with a foundational chapter that teaches networking essentials. The following chapter discusses performance monitoring and a guide for selecting tools. The book continues with traffic behavior topics such as packet structure, traffic types, packet efficiency, performance calculations and HTTP. Capacity design solutions such as link bandwidth, campus switching design, device and server components are presented. In addition topics such as WAN optimization, TCP features, route optimization, high availability and resiliency are discussed. The performance solutions are used to develop optimized campus, WAN, wireless and cloud designs. There are performance troubleshooting case study examples that teach assessment, analysis and design solutions