TCP over OBS - fixed-point load and loss

Abstract

Abstract:The sending rate of commonly used TCP protocols is tightly coupled to packet loss within the network: a high rate of packet loss will cause a sender to slow down, thereby reducing the network load and decreasing subsequent packet loss rates. In this paper, we combine a widely verified source rate TCP model with an Optical Burst Switching (OBS) loss model, to find fixed-point input loads and loss rates for an OBS link carrying TCP traffic. In doing so, we show that if OBS networks are to be efficiently used to carry TCP traffic, many wavelengths with full wavelength conversion are required.

Drop policies and multiple edge thresholds to enhance the performance of TCP over OBS networks with retransmission

“…As we know, TCP throughput influenced by the transmission networking factors [4] can be modeled as follows:…”

“…On the other hand, TCP is a dominant transport protocol today, and it is likely to be adopted in the future. Therefore, it is necessary to improve the performance of TCP over OBS networks [4].…”

A novel implementation of TCP Vegas for optical burst switched networks

“…However, if there are a finite number of TCP flows in the network and most senders are transferring large files using TCP, the sending rate of a TCP sender is tightly coupled with packet loss within the network [23], [24]. A high packet loss rate will cause a TCP sender to slow down, thereby reducing the network load and decreasing the subsequent packet loss rate in the network.…”

“…The fixed-point method based on the TCP feedback mechanism is adopted from [23,24]. For each input load, we can calculate the burst contention probability in an OBS network using the OBS contention probability model proposed in [15,16], shown as a solid line labelled "OBS" in Fig.…”

TCP Sending Rate Control at Terabits Per Second

“…The Transport Control Protocol (TCP) is one of the most commonly used protocols for data communications [2], but the extension of TCP to Terabit per second aggregate data rates has not been extensively studied. This work investigates the operation of future high capacity data links to explore the modifications which may be appropriate to ensure the robust operation of current protocols over high performance infrastructure.…”