Scalable Performance Signalling and Congestion Avoidance

ISBN-13: 9781461351177 / Angielski / Miękka / 2012 / 167 str.

Michael Welzl

Opis

This book answers a question which came about while the author was work- ing on his diploma thesis 1]: would it be better to ask for the available band- width instead of probing the network (like TCP does)? The diploma thesis was concerned with long-distance musical interaction ("NetMusic"). This is a very peculiar application: only a small amount of bandwidth may be necessary, but timely delivery and reduced loss are very important. Back then, these require- ments led to a thorough investigation of existing telecommunication network mechanisms, but a satisfactory answer to the question could not be found. Simply put, the answer is "yes" - this work describes a mechanism which indeed enables an application to "ask for the available bandwidth." This obvi- ously does not only concern online musical collaboration any longer. Among others, the mechanism yields the following advantages over existing alterna- tives: - good throughput while maintaining close to zero loss and a small bottleneck queue length - usefulness for streaming media applications due to a very smooth rate - feasibility for satellite and wireless links - high scalability Additionally, a reusable framework for future applications that need to "ask the network" for certain performance data was developed.

Spis treści

Foreword by Jon Crowcroft. Foreword by Max Mühlhäuser. Acknowledgments. 1: Introduction. 1.1. Reader's Guide. 1.2. Work done. 2: Related Work. 2.1. Congestion Control in Packet Networks. 2.2. Problems and Issues. 2.3. A Trend towards Explicit Signalling. 2.4. Congestion Control in ATM: ABR. 2.5. Quality of Service. 2.6. QoS and Congestion Control. 2.7. TCP-friendly QoS: A Comparative Evaluation. 2.8. Explicit Traffic Signalling in Packet Networks. 3: PTP: A Framework For Explicit Performance Signalling. 3.1. End-to-end Arguments revisited. 3.2. Architecture. 3.3. Performance Parameters. 3.4. Policy Considerations. 3.5. The Performance Transparency Protocol. 3.6. Content Type Definitions. 3.7. Usage Scenarios. 3.8. Realisation. 4: Congestion Avoidance With Distributed Proportional Control. 4.1. Architecture. 4.2. Design Phase 1: Fluid Model. 4.3. Analysis. 4.4. Design Phase 2: Discrete Model. 4.5. Evaluation 1: Dynamic Behaviour. 4.6. Evaluation 2: Long-term Performance. 4.7. Final Comments. 5: Conclusion. 5.1. Future Work. Appendices: A. The ns Network Simulator. A.1. Overview. A.2. Using ns. References. About the Author. Index.