We demonstrate that the dynamic behavior of queue and average window is determined predominantly by the stability of TCP/RED, not by AIMD probing nor noise traffic. We develop a general multi-link multi-source model for TCP/RED and derive a local stability condition in the case of a single link with heterogeneous sources. We validate our model with simulations and illustrate the stability regio...

With the growth of high performance networking, a single host may have simultaneous connections that vary in band-width by as many as six orders of magnitude. We identify requirements for an automatically-tuning TCP to achieve maximum throughput across all connections simultaneously within the resource limits of the sender. Our auto-tuning TCP implementation makes use of several existing techno...

We demonstrate that the dynamic behavior of queue and average window is determined predominantly by the stability of TCP/RED, not by AIMD probing nor noise traffic. We develop a general multi-link multi-source model for TCP/RED and derive a local stability condition in the case of a single link with heterogeneous sources. We validate our model with simulations and illustrate the stability regio...

Sprout is an end-to-end transport protocol for interactive applications that desire high throughput and low delay. Sprout works well over cellular wireless networks, where link speeds change dramatically with time, and current protocols build up multi-second queues in network gateways. Sprout does not use TCP-style reactive congestion control; instead the receiver observes the packet arrival ti...

Transmission Control Protocol (TCP) is a predominant transport layer protocol for data transmission. The burst nature of TCP congestion control mechanism has often lead to heavy link layer contentions over multi hop ad hoc networks. Acknowledgements (ACK) that compete with the data packets for medium access in the reverse path, further add up to the contention levels. Such intense contention pa...

TCP performs poorly on paths that reorder packets significantly, where it misinterprets out-of-order delivery as packet loss. The sender responds with a fast retransmit though no actual loss has occurred. These repeated false fast retransmits keep the sender’s window small, and severely degrade the throughput it attains. Persistent reordering occasionally occurs on present-day networks. Moreove...

In this paper, we present a new transport protocol TSMP, which seeks to support data transfer for the emerging usage paradigm of ”single user, multiple devices” in a TCP compatible manner. Through its novel naming and proxy-based designs, TSMP is able to retain the current client and server protocol operations of the legacy TCP protocol and TCP-based applications while placing new functions at ...

In recent years several multipath data transport mechanisms, such as MPTCP and XMP, have been introduced to effectively exploit the path diversity of data center networks (DCNs). However, these multipath schemes have not been widely deployed in DCNs. We argue that two key factors among others impeded their adoption: TCP incast and minimum window syndrome. First, these mechanisms are ill-suited ...

TCP performs poorly on paths that reorder packets significantly, where it misinterprets out-of-order delivery as packet loss. The sender responds with a fast retransmit though no actual loss has occurred. These repeated false fast retransmits keep the sender’s window small, and severely degrade the throughput it attains. Persistent reordering occasionally occurs on present-day networks. Moreove...

Scalable reliable multicast protocols have been a focus of recent research, tackling the problem of efficient reliable data delivery to an arbitrarily large number of receivers. Yet, the common applications of multicast, such as multi-point file delivery, or video streaming from a media server, typically only involve a moderate number of receivers, such as a thousand or fewer. Moreover, because...