TCP protocols evaluation in LTE

Research paper on the TCP protocol and its handling of bottlenecks, with a simple comparison between several copies of the protocol.

Development TCP Based on Adaptive Delay and Loss Response for Improving Satellite Networks Performance

In this paper, we propose modifications to TCP by introducing adaptive delay and loss response (TCP-ADaLR) to mitigate the adverse effects of satellite link characteristics.

Studying the performance and the Efficiency of random linear network coding in achieving the reliable transfer of data in losing wireless networks

Wireless networks suffer from frequent loss of packets for many reasons such as interference, collision and fading. This makes wireless medium unreliable medium for data transfer. The main methods for ensuring the reliability in this medium are using transmission control protocol (TCP) and the automatic repeat request (ARQ). Recently, network coding has been found as new technology that changes the traditional forwarding method (Store- and- Forward) in the networks to more effective and intelligent method (Code- and- Forward), which contributes to the increase of both capacity and throughput of these networks. In this research, random linear network coding is used as promising technology that aims to achieve the reliable transfer of data in losing wireless networks, and studying the enhancement that this technology presents to the performance of these networks in unicast and multicast transmission. For evaluating the efficiency of this technology and comparing its performance with the performance of reliable transfer protocols, we use the networks simulator (NS3). Simulation results showed that random linear network coding achieve the reliable transfer of data with bigger throughput and less delay and number of transmission compared with the protocols (TCP, ARQ).

Enhancing the Quality of Service for Real Time and non-Real Time Application via Internet Network

Services that demanded by users via internet network are classified in two main kinds, Services work in real time such as video and voice in real time and use UDP protocol, and other services that work in non-real time such as web browsing (HTTP) and file transfer (FTP) which use TCP Protocol. In this research, we study and analyze algorithms that enhance the quality of service for various applications. For real time application, we use queues disciplines, which gives high priority for these services and achieves minimum delay. For non-real time application, we study congestion control algorithms, which achieve best performance for reliable transfer process with existing the congestion in the network. We used OPNET 14.5 program for simulating various services via internet network. Simulation results show achieving minimum delay for voice service, and achieving high transmission rate for FTP application with existing of packets loss in the network.

A Study of QoS in Long Term Evolution Networks "LTE"

Long Term Evolution “LTE” is considered to be one of the most important and latest communication technologies falling under the fourth generation of cellular communications technology 4G. LTE supports high-speed and large bandwidth which makes it a great candidate to providing the potential to improve the Quality of Service "QoS" associated with specific types of data transfer. As a consequence, researchers have paid their attentions to this type of networks. In fact, it was a great challenge for researchers to achieve a good level of QoS for all users as the LTE provides Audio and Data transmission to users at the same time.

Study the effect of congestion control in improving the performance of computer networks algorithms

Computer networks have evolved considerably in the past few years of big increases in mutual amounts of data across the network hand because of the increasing number of interconnected devices, which can exchange data as part of the network and this is what led to the emergence of what is known as the problems of congestion Studies showed about some of these problems that the largest reason is involved in the implementation of the transmission rules, and this led to the urgent of multiple types of protocols in the computer networks that needs to deal with different computer and communication systems, and many other applications, which often causes errors at the level of the bit and level of the packets, missing packets, duplicate packets, randomly received packets, and most importantly the appeared congestion in the network. This research aims to determine how to improve the performance of the network to get rid of the congestion by using advantages of the algorithms used to avoid congestion that may occur in the networks that rely TCP protocol . The goals of these algorithms is to reach stability in the network by working to achieve the principle of package saving. Also within this scope it has been studied, and compared some of the algorithms that used to avoid congestion in general, without relying on a specific protocol or specific service category.

A SIMULATION STUDY OF TCP PERFORMANCE OVER SATELLITE CHANNELS

This research is mainly about the influence of protocols on the performance of Satellite Communication. We have studied and compared many TCP variants recently proposed.

Improving the Performance of TCP over Satellite Links by Modifying the Protocol TCP-Peach+ to Become Satellite Transport Protocol (STP)

This research includes an amendment to a TCP-Peach+ protocol to improve the performance of the TCP over satellite links, Where the protocol has been proposed based on splitting the connecting path between the source and target, in order to obtain an adjusted protocol of the kind of Satellite transport protocol (STP) specialized in the space segment only, and that by proposing a new algorithm for this protocol which is located under the satellite transport layer (STL). We have focused in our research on a comparison between the proposed protocol and TCP-Peach+ protocol.