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Closed-loop flow control protocols, such as the prominent implementation transmission control protocol (TCP), are prevalent in the Internet, today. TCP has continuously been improved for greedy traffic sources to achieve high throughput over networks with large bandwidth delay products. Recently, the increasing use for streaming and interactive applications, such as voice and video, has shifted the...
In this paper we present a new and efficient application level transport protocol UDA (UDP-based Delayed ACK) specially designed for device-to-device (D2D) networks operating over WiFi. Although WiFi speeds have increased manifold over the past few years, TCP performance over WiFi has not seen a commensurate improvement due to various overheads. One major overhead is caused by the cross-layer interaction...
We present a new and efficient application level transport protocol UDA (UDP-based Delayed ACK) specially designed for device-to-device (D2D) networks operating over WiFi. Although WiFi speeds have increased manifold over the past few years, TCP performance over WiFi has not seen a commensurate improvement due to various overheads. One major overhead is caused by the cross-layer interaction of TCP...
In this paper, the increasing TCP performances on data loss issue over wired and wireless networks by employing TCP freeze technique is proposed. The wired and wireless networks are simulated in Network Simulation version 2 (NS-2). There are 2 transmission protocols which are TCP and UDP with the same and different packet sizes in the simulation network. For TCP, the packets are alternately transmitted...
Rateless erasure code (REC) is an erasure code, where the encoder generates a potentially infinite number of encoded symbols and the original message can be reconstructed from a sufficient number of correctly received packets. Many REC-based transmission protocols have been proposed for improving network throughput in lossy channel. However, state-of-the-art RECs (such as LT code and Raptor code)...
Explicit Congestion Notification (ECN) lets a bottleneck's Active Queue Management (AQM) mechanism inform an endpoint about congestion without having to drop a packet. A recently proposed sender-side modification called Alternative Backoff with ECN (ABE) enables reduced latency while maintaining good utilization with ECN. However, under certain circumstances ABE can produce a degree of unfair behavior...
To study dynamic aspects of network protocols, like the transmission network protocol TCP, and networked control systems (NCS) with a UDP-like flow in a single framework, we employed UPPAAL, a tool that simulates discrete event systems as switched automata. Delays and packet losses can degrade the performance of a control loop, leading in the worst case to instability. In opposition to standard communication...
TCP-based application-layer protocols are increasingly applied to commercial live video streaming systems. However, in unstable mobile networks, the throughput of TCP may fluctuate rapidly due to its transmission mechanism, causing undesired playback interruption. In this paper, we propose a general application-layer rate adaptation approach to cope with the variability in TCP throughput. We analyze...
Time-dependent applications using TCP often send thin-stream traffic, characterised by small packets and high inter-transmission-times. Retransmissions after packet loss can result in very high delays for such flows as they often cannot trigger fast retransmit. Redundant Data Bundling is a mechanism that preempts the experience of loss for a flow by piggybacking unacknowledged segments with new data...
Next Generation Networks provide opportunities and challenges for data communication. In particular, the ever increasing bandwidth poses a major challenge to transport layer protocols such as TCP. In this paper the performance of TCP in large bandwidth delay networks, with particular regard to wireless network scenarios, is experimentally investigated. In particular we apply an accredited standard...
Recently, HTTP has been widely used for video delivery over the Internet. In many cases, a client receives video data via multiple concurrent connections regardless of limited bandwidth resource that may result in low quality of experience. In this work, we present a client-based method for sharing the capacity of a last-hop access link for multiple connections. Our method estimates the overall bandwidth...
Network performance increase does not have to be associated only with the upgrade of existing infrastructure and devices. More effective and less expensive increase of network performance can be achieved via sophisticated improvement of existing protocols, mainly at network and transport layer. The aim of this paper is to introduce our new approach for solving network performance issues which occur...
Congestion is a major issue in both wired and wireless communication system. Many techniques are applied in data link, network, and transport layer to control congestion. Out of which, flow control plays an important role in controlling the congestion. Again, several techniques are also used to control flows, i.e., AIMD, AISD, MIMD, etc. Still, packet drop occurs at the intermediate nodes due to buffer...
In this paper, we analyze the aggregate TCP throughput performance of a wireless link utilizing Active Queue Management (AQM) and an Adaptive Modulation and Coding (AMC) scheme with Hybrid ARQ (HARQ) based on the probability of failure in the first transmission attempt. We assume packets arriving out-of-order at the wireless receiver due to random retransmissions are resequenced before being released...
Cloud computing is becoming commonly used for enterprise systems. Users utilize WAN, the Internet, or a wireless network to access the cloud service. These networks often have large RTT and packet loss ratios (PLR), so if users communicate via TCP widely used for accessing cloud services, the throughput decreases and the access quality of the cloud service deteriorates. Therefore, much TCP acceleration...
Wireless communication is an essential component of many unmanned systems, yet presently, there are some communication challenges that limit the full potential of these systems. In particular, transmission distance, throughput efficiency using Transmission Control Protocol (TCP), and wireless spectrum availability are a few of these challenges. In order to mitigate these specific problems, we propose...
Transmission control is an important issue in the Internet or other computer networks today. The retransmission scheme in TCP cannot have the best throughput in the network scenarios with more wireless links or complicated topologies. Some related works proposed the solution by network coding. Network coding is suitable for generate the redundant data for error correction. In this paper, we discussed...
The tremendous growth of video content over the Internet and evolution towards more personalized video applications has led to a need for a network and service infrastructure better suited to today's content and mobility needs. Quality of Experience (QoE) management is one of the major challenges for video delivery given the limited bandwidth for wireless access network causing video packet drops...
In this paper we evaluate and compare the end-to-end performance of different multipath TCP (MPTCP) congestion controllers when run in conjunction with different TCP packet reordering recovery algorithms. The paper answers the following questions: what is the impact of out-of-order events on the end-to-end throughput when using MPTCP, how do out-of-order recovery algorithms that have been proposed...
A computer network is basically the combination of computers and different type of devices that are interfaced by a range of resources i.e. communications channels that provide the communications between users and allow them ability of sharing the resources. Multicasting is used to send the information from one receiver to group of receivers. But it is faced big issue because of additional data demand...
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