PPT-Revisiting Transport Congestion Control

Jian He UT Austin 1 Why is Congestion Control necessary Data Packets ACK Congested Link Congested link vs reliability long queuing delay packet loss But can delay or packet loss always . 3-. 1. Chapter 3. Transport Layer. Computer Networking: A Top Down Approach . 6. th. edition . Jim Kurose, Keith Ross. Addison-Wesley. March 2012. Part 4: Congestion control. Transport Layer. 3-. 2. MSc Urban & Regional Planning. 28 January 2013. Road pricing in England: has its time finally come?. Agenda. Historical context. The problem as was. The problem looking forward. Experience from London. Ihsan Ayyub Qazi. Background: Congestion Control. What is congestion?. A network state where the arrival rate exceeds the service rate. Throughput starts decreasing (due to packet losses). Delay increases fast (queues build up). T.Najah. Al-. Subaie. Kingdom of Saudi Arabia. Prince Norah . bint. Abdul . Rahman. University. College of Computer Since and Information System. NET331. Data Traffic. The main focus of congestion control is data traffic.. CS 381. 3/7/2017. Transport. . Layer. 3-. 2. Chapter 3 outline. 3.1 transport-layer services. 3.2 multiplexing and . demultiplexing. 3.3 connectionless transport: UDP. 3.4 principles of reliable data transfer. 14. Transport Layer . (Transmission Control Protocol). slides are modified from . J. Kurose & K. Ross. University of Nevada – Reno. Computer Science & Engineering Department. Fall . 2011. CPE 400 / 600. 14-740: Fundamentals of Computer Networks. Credit: . Bill . Nace. Congestion Control (2). Apply some control theory. Region 1: Low throughput. Region 2: High delay. Throughput increases slowly. Delay increases quickly. Success Criteria . I can give at least 5 reasons for traffic congestion in Glasgow. Lesson 5: Need for traffic management schemes - Glasgow. Why do you think there is traffic congestion in Glasgow? . , the scheme is estimated to save £2.5 million per year as a result ofa reduction in vehicle kilometres travelled, fuel consumption and Transport for London website, “Congestion Charging” (2007 Algorithm Identification for Traffic Separation. Elie Kfoury. *. , Jorge Crichigno. *. (Presenter), Elias Bou-Harb. ^. *. College of Engineering and Computing, University of South Carolina. ^. Cyber Center For Security and Analytics, University of Texas at San Antonio, USA. 3.1 transport-layer services. 3.2 multiplexing and demultiplexing. 3.3 connectionless transport: UDP. 3.4 principles of reliable data transfer. 3.5 connection-oriented transport: TCP. segment structure. Ashkan Paya . 1. Based on. An argument for increasing TCP’s initial congestion window. Nandita Dukkipati, Tiziana Refice, Yuchung Cheng, Jerry Chu, Tom Herbert, Amit Agarwal, Arvind Jain and Natalia Sutin. Google Inc.. Summary. . July 28, 2012. What can we do?. Absent changes to the network can we actually do something?. Yes. Is there work in the area of measurements that can we do to create “incentives” to make updates in the network happen?. Dr. Rocky K. C. . Chang October 25, 2010. 1. The network congestion problem. 2. Problem: How to effectively and fairly allocate network resources among a collection of competing users?. Congestion is the state of sustained network overload..