The Keys to Converged IP Networks:
Traffic Engineering and Quality-of-Service - Techniques, Carrier Current Practices, and Algorithms
A fundamental impetus at every major carrier anywhere on the globe today is network convergence, the notion of eventually putting multiple types of traffic - packet- and circuit-switched - on a common packet-based backbone that uses the Internet
Protocol (IP). Whether it be ATT in the US, France Telecom or BT in Europe, Optus in Australia, KT in Korea, NTT in Japan, or BSNL/MTNL or Reliance in India, each of these carriers is in the process of formulating strategies for efficient network operation
and deployment of profitable packet services.
This requires that carriers not only optimize network performance by better resource allocation to the inherently different traffic demands impinging on the network, but that they also use new and improved techniques to offer graded qualities-of-service (QoS) to different traffic. Thus, voice-over-IP (VoIP) or video-on-demand (VoD) traffic requires a rather different network operation strategy than does SAP traffic or best-effort email traffic. This is especially important with the packet infrastructure becoming a critical business resource for enterprises the world over.
The key to achieving this is traffic engineering (TE), defined as a set of processes that systematically aims to put traffic where there is capacity, and intelligent QoS strategies that determine the resources and priority to be accorded to different traffic types at different times.
Understanding the methods, protocols, practices, and algorithms for TE and QoS, and gaining insights into the network- and deployment-level issues that influence the design of chips, systems and software going into carrier networks is crucial for building both advanced networking chips, systems, and software, and the networks themselves.
With this goal, this workshop covers:
- The move towards convergence: drivers, business benefits, current and future roadmaps
- Drawbacks of traditional IGPs & proposed extensions: equal-cost multipath, metric tuning
- TE process model at a provider: measurement, modeling, analysis, optimization
- Components of Internet TE: MPLS, constraint-based routing (CBR), enhanced IGPs and signaling protocols, or alternatives discussed under TE methods" below
- Components of Internet QoS: service definitions, signaling and admission control, policing/shaping, QoS-based routing, QoS-based forwarding (buffer allocation, RED, queueing disciplines)
- TE methods in operational IP networks: evolution and best current practices; case studies of Sprint and Global Crossing
- On-line & off-line algorithms for TE: theoretical developments, practical approximations
- Considerations for inter-domain TE: controlling congestion and peering traffic across provider boundaries
- Practical techniques for providing QoS: what are some of the provider best-practices to offer QoS and tiered services; protocol details and practical issues
- Canonical service provider approaches to network design: fiber infrastructure, restoration strategies, backbone robustness, IGP convergence & network stability, queueing for voice.