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.

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.