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Integration of different network services into a converged infrastructure is one of the most intensive challenges in the converged network application development area. Huge differences exist regarding several characteristics of data, voice and video content traffics. While data traffic requires error free services, real time applications like interactive video transfer and VoIP distress of the high...
IP Television (IPTV) is a new service that is growing up very quick in recent years. Its implementation is performed as a Triple-Play service, being the integration of voice, high-speed data and television. Moreover, the network traffic has been increased due to the use of VoIP, video or P2P. It is also creating congestion problems to the network provider and has high impact on the quality of IPTV...
The continuous growth in both commercial and public network traffic with various quality-of-service (QoS) requirements is calling for better service than the Internet's best effort mechanism. One of the challenging issues is to predict the overall behavior of aggregate network traffic. While network traffic characterization has been studied extensively due to its importance in network scheduling and...
Reduction in the cost of the network infrastructure will always be a relevant and commercially important topic. There is a balance between cost and Quality of Service (QoS) that has been traditionally managed in a static manner. This is no longer an ideal situation as network traffic and configuration can change in a dynamic manner. This paper examines methods by which VoIP can be managed using a...
In this paper, we evaluate the impact of the wireless channel and physical layer parameters on the performance of VoIP traffic in IEEE 802.11g networks. The wireless channel is modeled using a finite state Markov chain based on an adaptive modulation and coding scheme. The transition probabilities encompass the effects of the time-varying wireless channel, such as the Doppler frequency and the operating...
Networks need to accommodate diverse applications with different quality-of-service (QoS) requirements. New ideas at the physical layer are being developed for this purpose, such as diversity embedded coding, which is a technique that combines high rates with high reliability. We address the problem of how to fully utilize different rate-reliability characteristics at the physical layer to support...
Under limited bandwidth, how to improve quality of service in VoIP (Voice over Internet Protocol) is a significant problem of the network traffic today. However, some protocol of VoIP traffic such as Skype is encrypted; with this problem, the network administrator can't manage the VoIP bandwidth and result in time delay or loss of voice packets. The purpose of this study is to improve VoIP bandwidth...
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