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A variety of wireless communication links today, such as HSPA+ access in high speed trains, balloon-based aerial wireless networks and satellite Internet connections have high loss rates. In such environments, Multipath TCP (MPTCP) offers a robust solution compared to regular TCP. However, MPTCP and existing schedulers suffer from performance degradation for both constant bit rate (CBR) and bulk traffic...
BBR is a recently proposed congestion control. Instead of using packet loss as congestion signal, like many currently used congestion controls, it uses an estimate of the available bottleneck link bandwidth to determine its sending rate. BBR tries to provide high link utilization while avoiding to create queues in bottleneck buffers. The original publication of BBR shows that it can deliver superior...
Low Extra Delay Background Transport (LEDBAT) is defined in RFC6817 as a congestion control algorithm for lower than best effort transport service that reacts to both delay and loss congestion signals. LEDBAT allows bulk transfer applications (such peer-to-peer file transfer and software updates) to utilize available capacity in the background while limiting additional forward queuing delays at network...
Consumers frequently get Internet access through a single home gateway. Gateways using conventional FIFO queue management can introduce hundreds or even thousands of milliseconds of additional delay when congested by bulk TCP data transfers. This delay impacts negatively on any latency-sensitive interactive traffic (such as Voice over IP, or First Person Shooter games). Such applications prefer network...
Software-defined networking (SDN) is a promising future network architecture which introduces new dimensionsin flexibility and adaptability to cope with different Quality of service (QoS) metrics, such as latency constraint, loss rate, etc. In this paper, we provide differentiated Services for flows of a topic-oriented publish/subscribe system to address some of the QoS guarantee issues, by leveraging...
Due to the widespread use of broadband communication media, it is often the case that the conventional TCP cannot fully utilize such broad bandwidth; hence, many improvements on TCP itself and a lot of accelerating methods which use multiple TCP flows have been proposed. In addition, video hosting services on the Internet as a new medium have become popular, and progressive downloading methods, which...
Transmission Control Protocol (TCP), a reliable stream delivery transport protocol performs well in wired network compared to the multi-hop wireless network. The multi-hop wireless networks have several distinct features like dynamic self-configuration and self-healing ability remains integrated with wireless internet that enhances its capability. The TCP implementation in multi-hop wireless network...
This paper aims at increasing our understanding of the behaviour of some of the major TCP variants in LTE networks. A simulation study on the behaviour of seven TCP variants is performed. The evolution of the throughput, congestion window and queuing delay are studied for four scenarios with different network loads and flow types. Our measurements show that, in average radio conditions, most variants...
Tactical networks is a heterogeneous network which facilitates information sharing and data exchange among military tactical force units. The tactical communication depends on factors such as network characteristics, communication media resources, operational mobility, terrain etc. The key challenge is to address typical military communication network constraints such as limited bandwidth and latency,...
In a data communication network, several flows contend to utilize limited and shared network resources, however, this gives rise to congestion along with other network issues. So, this leads to the development of congestion control based methods/ protocols to support the deployment of real-time multimedia applications while ensuring reliability and fairness. This paper presents a simulation based...
Active Queue Management (AQM) mechanisms have come a long way, with an initial goal to avoid congestion to the recent most focus on reducing queue delay. The benefits of using AQM mechanisms at routers are being thoroughly studied nowadays, mainly to avoid the problem of bufferblaat. Although a lot of work has focused on analyzing the behavior of AQM mechanisms, the nature of traffic used while deriving...
Interactive and delay-sensitive applications constitute an important and growing part of the Internet. Today, low delays can only be achieved if there are no congested links along the path. At a bottleneck, the commonly used congestion control mechanisms induce high queuing delay and packet loss. Specialized congestion control mechanisms achieving a low queuing delay in an otherwise congested network...
Recent cloud datacenter network usually has multiple transmission paths for any pair of servers to increase the aggregate bandwidth and to improve the robustness of failure recovery. Therefore, Multipath TCP (MPTCP) is becoming one of the most important transport protocols exploring the multipath resource to improve the performance of cloud network. It is obvious that MPTCP could significantly increase...
This paper will discuss about transmission of multimedia content in limited capacity network (up to 5 Mbps), especially to study about the impact of background traffic towards multimedia content delivery quality in a limited capacity network. Observation methods proposed in the study include measurement of limited capacity network, background traffic modeling, and simulating the network to observe...
According to RSM Model and IPv6 QoS management system architecture, this paper verified that RSM model and the management systems based on it have an excellent delay and packet loss rate guarantee for corresponding flows with high priority through NS-2 simulation experiments, and they were suitable for end-to-end delivery for delay sensitive communication, especially for high priority communication,...
The complexity of network routing infrastructures is increased dramatically. To tackle this issue, a promising state-of-the-art paradigm called software defined networking (SDN) is introduced. Due to the differences in the network requirements of applications, QoS-aware routing plays an important role in the networks. Recent proposed resource allocation algorithms focus on the current traffic matrix...
In 5G, heterogeneous broadband networks will emerge to a common set of objectives to offer the end users higher capacity, robustness, security, QoS, and more in a unified and converged manner. In order to provide end-to-end QoS support to application services over the heterogeneous networks, a common QoS framework is proposed in this paper. The framework consists of a two-level scheduling scheme:...
In typical data center networks, an overwhelming majority of the flows are smaller than 200 KB in size, while most transmitted bytes are from a small fraction of large flows. The small flows are usually from the applications interacting with end users, thus they require small completion times. Meanwhile, the data center owners hope to keep the high throughput of the network to make full use of their...
Active Queue Management (AQM) and solutions to the bufferbloat problem have gained a huge attention in the research community, but it is unknown to what extent such solutions are currently deployed on the Internet. In this paper, we present a demonstration of a tool, called TADA, for automatic detection of AQM on a transmission path bottleneck. We have developed an active measurement tool for Linux,...
In recent years, Multipath TCP [1] has been extensively studied. However, it has been mainly studied for the purpose of bandwidth aggregation or smooth failover during roaming within mobile networks. Interactive real time data for the control of machines is a special case in data transmission as failure tolerance and latency are the important Quality of Service (QoS) parameters. In order to establish...
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