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Congestion control for high bandwidth-delay product networks (2002)
| Content Provider | CiteSeerX |
|---|---|
| Author | Ley Charlie Rohrs Ý Tellabs, Mit-Lcs Icsi Dina Katabi Mark, H. |
| Abstract | Theory and experiments show that as the per-flow product of bandwidth and latency increases, TCP becomes inefficient and prone to instability, regardless of the queuing scheme. This failing becomes increasingly important as the Internet evolves to incorporate very high-bandwidth optical links and more large-delay satellite links. To address this problem, we develop a novel approach to Internet congestion control that outperforms TCP in conventional environments, and remains efficient, fair, scalable, and stable as the bandwidth-delay product increases. This new eXplicit Control Protocol, XCP, generalizes the Explicit Congestion Notification proposal (ECN). In addition, XCP introduces the new concept of decoupling utilization control from fairness control. This allows a more flexible and analytically tractable protocol design and opens new avenues for service differentiation. Using a control theory framework, we model XCP and demonstrate it is stable and efficient regardless of the link capacity, the round trip delay, and the number of sources. Extensive packet-level simulations show that XCP outperforms TCP in both conventional and high bandwidth-delay environments. Further, XCP achieves fair bandwidth allocation, high utilization, small standing queue size, and near-zero packet drops, with both steady and highly varying traffic. Additionally, the new protocol does not maintain any per-flow state in routers and requires few CPU cycles per packet, which makes it implementable in high-speed routers. |
| File Format | |
| Publisher Date | 2002-01-01 |
| Access Restriction | Open |
| Subject Keyword | Conventional Environment New Avenue High Bandwidth-delay Environment Novel Approach Utilization Control High Utilization Cpu Cycle Large-delay Satellite Link Near-zero Packet Drop Round Trip Delay Explicit Congestion Notification Proposal High-bandwidth Optical Link Fair Bandwidth Allocation Internet Congestion Control Fairness Control Latency Increase Xcp Outperforms Tcp Efficient Regardless Bandwidth-delay Product Increase Extensive Packet-level Simulation High-speed Router High Bandwidth-delay Product Network Tractable Protocol Design Control Theory Framework Per-flow Product New Explicit Control Protocol Queue Size Service Differentiation New Protocol Congestion Control Per-flow State Link Capacity |
| Content Type | Text |
