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Video smoothing techniques can be used to facilitate more effective transmission and to preserve better video quality. In this paper we develop a semi-optimal video smoothing approach to manage the transmission rates of MPEG-4 and H.264 video over a QoS-based wireless LTE network. The proposed technique utilizes a smoothing buffer with pre-defined thresholds to smooth the transmission rates while...
Universal Mobile Telecommunication System (UMTS) is a third generation mobile communication systems that supports wireless wideband multimedia applications. The objective of this paper is to present a new model for non-intrusive prediction of H.264 encoded video quality over UMTS networks and to illustrate their application to video quality monitoring and adaptation in mobile wireless streaming services...
In this paper, we propose an uplink call admission control (CAC) scheme for WCDMA. The proposed scheme employs two-stage bit rate degradation strategies to reduce the total number of interference in order to increase the achievable SIR of the to-be-admit call especially in congested situation. The proposed scheme has shown improvement in the QoS performance by reducing the percentage of blocked calls...
In this paper, a novel radio admission control (RAC) scheme is proposed for handling multiclass services in Long Term Evolution (LTE) systems. An objective function of maximizing the number of admitted users is proposed to evaluate the system capacity. To solve the optimization problem, we present a combined complete sharing (CS) and virtual partitioning (VP) resource allocation model and develop...
In order to improve the quality of service for data services in UMTS, complex analysis and optimization campaign must be made. Faster and reliable optimization is possible by using fuzzy logic modelling, in order to have an easier approach and understanding of the solution to implement.
Enhanced Multimedia Broadcast/Multicast Service (EMBMS) is a new function defined in 3GPP specification, which supports download delivery and streaming delivery to group users in LTE mobile networks. In 3GPP Release 8 specification, the EMBMS transmission is classified into single-cell transmission and MBSFN (Multicast Broadcast Single Frequency Network transmission). In MBSFN, the statistical multiplexing...
In beyond 3G networks the user will not be aware of the access network technology used to provide a telecommunications service. Heterogeneous network technologies will be seamlessly integrated in one "common'' access network, enabling users to move around and continuously receive their subscribed services. In a commercial environment, this network evolution requires that a telecommunications...
Taking the uplink scheduling technique in 3GPP LTE system into consideration, the two-level buffer state report (BSR) scheme is proposed as a better candidate solution for uplink resource allocation in LTE system and future beyond third-generation system. In the proposed two-level scheme, the second level BSR content is a complement information of the BSR in LTE system which is regarded as the first...
This paper targets multicast packet scheduling over cellular networks like High Speed Downlink Packet Access (HSDPA). The salient benefit of multicast is to avoid clogging up the air interface with redundant data transmissions. When allocating resources to users of a system, it should be aimed at fulfilling QoS requirements instead of only providing fairness or maximizing the system throughput. This...
Employing multiple radio access technologies such as WiMAX, HSDPA and Wi-Fi in a mobile network to provide users with more cost-effective communication services has long been a vision of many service network providers. In this paper, we propose a novel user-decided service model for a cooperative wireless network in which the radio resources of multiple wireless networks are collectively managed....
According to the B3G concept, diverse radio access technologies (RATs) can converge into one composite radio environment, where the user is "always best connected" and can move between the various technologies seamlessly. Cognitive wireless networks [1],[2] have emerged as a complementary concept to B3G networks. In general, cognitive systems establish their behaviour, in a reactive or proactive...
In mobile networks each type of services has distinct characteristics and QoS requirement. The important issues in 3-G N/W are to prepare a framework for multi-class services to perform call admission and handoff efficiently. The available call admission control (CAC) and handoff techniques in mobile network have considered only single class of service or have touched value of few classes but not...
Policy and charging control provides operators with advanced tools for service-aware QoS and charging control. PCC for the evolved packet system, defined as part of the 3 GPP Release 8 specifications, has evolved significantly from previous releases to support multiple-access technologies, roaming, and mobility. Within the PCC framework, a number of protocols have been specified to implement these...
In this article we describe the QoS concept of the evolved packet system, which was standardized in 3GPP Release 8. The concept provides access network operators and service operators with a set of tools to enable service and subscriber differentiation. Such tools are becoming increasingly important as operators are moving from a single to a multi-service offering at the same time as both the number...
A prioritised adaptive CDMA scheme in which processing gain is given priority over modulation and coding schemes (MCS) in wireless systems is presented. The need for such design is necessary for increased bit rate. A scheme that has the capability to optimise both throughput and quality of service without sacrificing the required bit rate is designed. This is applied to direct sequence code division...
How good is a best effort network for different services in multi-service LTE networks? In this paper, we try to answer the question in the context of capacity of an LTE network with users concurrently running multiple services. We present a system simulation study for two-service scenarios with VoIP and a second service represented by real-time video, mobile TV, or web surfing. We present results...
Long term evolution (LTE) architecture shall support end-to-end quality of service (QoS). For the QoS support and service differentiation it is important that the admission control and packet scheduling functionalities are QoS-aware. In this paper a combined admission control and a decoupled time-frequency domain scheduling framework for LTE uplink is presented. The proposed framework is shown to...
Mobility is one of the important services in the 3G wireless networks. However the current handover technique lacks quality of service (QoS) support. The objective of this paper is to provide a QoS enabled dynamic handoff to provide high quality media transmission during mobility. Three different handoff mechanisms are proposed and their performances are analyzed. These methods overcomes the handoff...
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