Contents

• Introduction
  • Network Architecture
  • Routers - Bottlenecks in the Network
  • Congestion in Connectionless Packet-switched Networks
• Problems with Existing Congestion Control Schemes
  • Transport Layer Design
  • TCP's Sliding Window
  • Retransmission Timer Deficiencies
  • ICMP Source Quench
  • The Dec Bit Mechanism
• TRUMP and RBCC
  • Congestion Information in Packets
  • Information Kept in Routers - The Allocated Bandwidth Table
• TRUMP/RBCC Operation
  • Source Transmission
  • Packet Routing
  • Deciding to Update the ABTs
  • Changing the Packet's Rate Field
  • Updating the ABTs
  • Packet Reception by the Destination
  • Packet Reception by the Source
  • Connection Termination
• Comparing TRUMP/RBCC and TCP/IP's Congestion Control
  • Optimum Rates for Scenario 7
  • Indicators of Network Congestion
  • Transmission Sequence Numbers
  • Packet Loss
  • Router Queue Lengths
  • End to End Delays
  • Link Utilisations
  • Predicted and Measured TRUMP Transmission Rates
• Evaluation of Comparison Results
• Further Work and Conclusions
• Acknowledgments
• REAL NetLanguage for Scenario 7
• Theoretical Rate Calculation for Scenario 7
• Deficiencies with RBCC
• Obtaining TRUMP and RBCC
• References