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Carter, Donald E.Congestion control using saturation feedback for multihop packet radio networks
Master of Science (MS), Ohio University, 1991, Electrical Engineering & Computer Science (Engineering and Technology)
Congestion control using saturation feedback for multihop packet radio networks

Committee:

Jeffrey Dill (Advisor)

Keywords:

Congestion Control; Saturation Feedback; Multihop Packet Radio Networks

Jero, Samuel C.Performance Analysis of the Datagram Congestion Control Protocol DCCP for Real-Time Streaming Media Applications
Master of Science (MS), Ohio University, 2013, Computer Science (Engineering and Technology)
The growth of real-time, streaming media application traffic in the Internet presents a number of challenges because the real-time constraints and interactive nature of these applications render the use of TCP ineffective. These streaming media application flows are usually high bandwidth and long duration, which means they should utilize network congestion control to avoid congestion collapse and ensure fairness. The Internet Engineering Task Force (IETF) developed the Datagram Congestion Control Protocol (DCCP) to provide congestion control for these types of real-time applications. A major factor behind this effort was the desire to eliminate the duplication of effort and potential for error resulting from each application implementing its own congestion control. In this research, we examine the difference in network performance and video quality for a typical application, a high bandwidth video telephony client, when using DCCP instead of the default transport protocol. We discuss several challenges to porting an application to DCCP and then examine the impact of DCCP on network and application performance in both testbed and Internet environments. We show that DCCP responds to changing network conditions within a few round trip times and provides better fairness to other network traffic than typical real-time, streaming media congestion control methods. Given fair bandwidth allocation, DCCP provides equivalent or better video quality, as measured by Peak Signal to Noise Ratio (PSNR) and Structural Similarity (SSIM).

Committee:

Shawn Ostermann (Advisor)

Subjects:

Computer Science

Keywords:

DCCP; Datagram Congestion Control Protocol; TFRC; TCP-Friendly Rate Control; network congestion; RTP; Real-Time Transport Protocol; network performance analysis; real-time streaming media; streaming media; streaming video

Afifi, Mohammed Ahmed Melegy MohammedTCP FTAT (Fast Transmit Adaptive Transmission): A New End-To- End Congestion Control Algorithm
Master of Science in Electrical Engineering, Cleveland State University, 2014, Washkewicz College of Engineering
Congestion Control in TCP is the algorithm that controls allocation of network resources for a number of competing users sharing a network. The nature of computer networks, which can be described from the TCP protocol perspective as unknown resources for unknown traffic of users, means that the functionality of the congestion control algorithm in TCP requires explicit feedback from the network on which it operates. Unfortunately this is not the way it works with TCP, as one of the fundamental principles of the TCP protocol is to be end-to-end, in order to be able to operate on any network, which can consist of hundreds of routers and hundreds of links with varying bandwidth and capacities. This fact requires the Congestion Control algorithm to be adaptive by nature, to adapt to the network environment under any given circumstances and to obtain the required feedback implicitly through observation and measurements. In this thesis we propose a new TCP end-to-end congestion control algorithm that provides performance improvements over existing TCP congestion control algorithms in computer networks in general, and an even greater improvement in wireless and/or high bandwidth- delay product networks.

Committee:

Nigamanth Sridhar, PhD (Committee Chair); Chansu Yu, PhD (Committee Member); Pong Chu, PhD (Committee Member)

Subjects:

Computer Engineering; Computer Science; Electrical Engineering

Keywords:

TCP; Congestion Control; Computer Networks; TCP NewReno; TCP Westwood; TCP Cubic; Linux TCP; ns-3; DCE Cradle; Direct Code Execution Cradle - ns-3; high bandwidth delay product networks; random loss radio signal; Adaptive Transmission

Eddy, Wesley M.Improving Transport Control Protocol Performance With Path Error Rate Information
Master of Science (MS), Ohio University, 2004, Computer Science (Engineering)

The Transmission Control Protocol (TCP)is designed to reliably transmit data over a wide range of network conditions while responding fairly to other traffic when given an indication of congestion. TCP's inability to distinguish between packet losses due to congestion and those due to corruption, however, makes it perform inefficiently on links with a high rate of packet errors. We describe methods for notifying TCP senders of a network path's packet error rate and ways for using this information to increase TCP's performance while still behaving reasonably in response to congestion signals.

Committee:

Shawn Ostermann (Advisor)

Keywords:

Transport Control Protocol; Wireless and Satellite Networks; Network Congestion Control; Packet Corruption