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In this paper we introduce and asses the performance of a new scheduling algorithm based on Earliest Due Date (EDD) mechanism. Our proposed scheduling algorithm enhances the performance of Real-Time (RT) flows such as video and Voice Over Internet Protocol (VOIP) in Long Term Evolution (LTE) cellular networks especially in downlink. The proposed scheduling scheme provides the lowest Packet Loss Ratio...
Today, One of the most important performance measures in the new burst traffic gets to 3G and 4G systems is the End-to-End jitter. However, in order to study and analyze Jitter, many works and models have been devoted to estimate and evaluate this parameter. In this paper, analytical formulas for jitter of interrupted Poisson traffic (IPP) and MMPP-2 are presented. We provide Jitter approximation...
The Internet has now become such an important infrastructure that is capable of sending information within a very short time and easy to access. It is considered as public networks that provide affordable WAN services to most customers. Applications such as video conferencing, file transfer protocol and VoIP are the example of typical network applications supported by the Internet Protocol. Various...
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...
In this paper, we propose QoS-aware AQM(Active Queue Management) method considering video quality level that service users request in DiffServ network environment. QoS provision is essential in order to provide multimedia services because real-time multimedia services such as IPTV and VoIP are sensitive to delay and packet loss. However, existing AQM methods can't guarantee QoS for a multimedia service...
SCS is a video output scheme which is designed to maximize QoE in audio-video IP transmission; it is featured by the applicability to end-terminals independent of the type of used networks. SCS switches between video error concealment and video frame skipping by comparing the percentage of error-concealed video slices in a frame to a threshold value, which is a key parameter for successful implementation...
In this paper we implement and evaluate two scheduling techniques for mixed data traffic (VoIP and Video Streaming-VS) in LTE systems. We present results regarding resources allocation and traffic evaluation (mean throughput per user) for the Best CQI scheduler and compare to those for a Round Robin (RR) scheduler. Both services are delay-critical services but by prioritizing VoIP in the Best CQI...
IP Multimedia Subsystem (IMS) known for its prominent service delivery is paving way for applications like Video Voice over IP (VVOIP) on handheld devices too. Android, a software platform from Google, pioneering in middleware and applications domain of handheld devices does not offer support for IMS services by design. Motivated by these observations, we present novel scalable architecture to cater...
In the recent years, Voice over Internet Protocol (VoIP) is the most popular technology and becomes a kind of killer application, and 802.11-based wireless Local Area network (WLAN) has been set up in many public places. People who use VoIP over WLAN can be more convenient. In the common WLANs, IEEE 802.11e WLAN can support VoIP with better Quality of Service (QoS), However, 802.11 lacks a flexible...
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...
In this paper, we propose a network performance monitoring method which can measure delay of each network using the RTCP(Real-time Transport Control Protocol) timestamp fields to detect a trouble section in interworking environment. According to the increment of real-time multimedia service provision, network performance monitoring method is necessarily needed for QoS management of real-time services...
The IEEE 802.16/802.16e provides powerful tools in order to achieve different QoS constraints. The MAC layer defined five scheduling service types to provide QoS differentiation for different types of applications. In this paper, we investigate the performance of the scheduling schemes deployed in the OPNET modeler by considering VoIP, video conferencing and non-real-time services. We further investigate...
Emerging hybrid satellite communications and wireless network architectures support high bandwidth services and applications for tactical users. In this paper we propose a cross- layer design approach focusing on physical layer interaction on the application layer using an OPNET simulation environment. This paper studies the effect of fading on dynamic resource allocations and the impact of rain fading...
This paper describes a generic architecture for monitoring multimedia services, such as IPTV, MobileTV or VoIP, by analyzing the traffic of real users from an end-to-end perspective. The main data source is the information gathered by different types of probes deployed all over the monitored network. In addition, these detailed records are correlated inside the core of the architecture in order to...
One of the main challenges in cellular wireless data networks is to meet the stringent quality of service (QoS) requirements of voice over IP (VoIP) and video streaming traffic whilst attaining high total cell throughput. In this paper, a novel two layered scheduling approach that addresses this challenge in a UMTS based HSDPA network is presented. The first layer carries out resource reservation...
During the last years next generation networks (NGNs) have gained attention, as an increasing number of network operators moved toward triple-play services: telephony, Internet and IPTV. Unfortunately, from the service provider perspective, IPTV usually comes at a high cost in terms of equipment and/or necessary bandwidth. In this paper we propose Nozzilla, a peer-to-peer like video streaming service...
IP Multimedia Subsystem (IMS) entails novel business opportunities for pioneering and emerging multimedia services, such as IPTV and VoIP video call applications. However, this strong commercial interest on this promising convergent IMS environment is balanced by the lack of efficient user/customer-centric network management mechanisms. ADAMANTIUM project proposes an IMS-compatible multimedia content...
Multimedia applications have been the key driving force in converging fixed, mobile and IP networks. A major hurdle in the realisation of this convergence is obtaining Quality of Service from a heterogeneous, best-effort service network. Interactive voice requires strict bounds on delay, jitter and packet losses, video adds significant bandwidth requirements to the network, while Internet only makes...
IEEE 802.16, popularly known as WiMAX, is one of the most innovative methods developed in recent times to address growing demand for high-speed wireless broadband networks. This paper addresses the problems concerning the delivery of video packets in video conferencing and other multimedia application services over WiMAX. Multiple competing traffic sources over a point-to-multipoint WiMAX topology...
This paper evaluates the QoS performance of multimedia applications over wireless and wired IPv6 environment in comparison with IPv4 using the same underlying hardware. Concerning the multimedia applications, this paper discusses video streaming and Internet telephony (VoIP) because both services will be common and widely used applications by the next generation of Internet users. Our measurement...
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