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In order to successfully resolve the network infrastructure's problems the network provider has to improve the service quality. However in traditional ways, maintaining and improving of the service quality are generally determined in terms of quality of service criteria, not in terms of satisfaction and perception to the end-user. The latter is represented by Quality of Experience (QoE) that becomes...
In this paper, an admission control (AC) scheme is proposed for handling multiclass Grade of Service (GoS) and Quality of Service (QoS) in Uplink Long Term Evolution (LTE) systems. GoS requirement in conjunction with QoS has been seldom taken into account in previous admission control and resource allocation algorithms for LTE uplink. We propose a novel algorithm for handling the priorities while...
The growing problem of spectrum scarcity and the inefficient spectrum utilization in the licensed bands, are addressed by the emerging Cognitive Radio (CR) paradigm. It is seen that the choice of the spectrum bands, called as spectrum decision, must be organized carefully by considering the challenges in the spectrum availability over time, the short term fluctuations in the availability, and the...
An efficient Call Admission Control (CAC) arithmetic is essential to guarantee QoS for enhancing the utilization of radio resource in multi-traffic CDMA systems. This paper presents a Multi-Class Services Dynamic Mixed Judgment CAC arithmetic. This arithmetic judges a new coming call whether to accept or not based on the remaining resource, the priority of all services and the resource reservation...
The emerging IEEE 802.16e Broadband Wireless Access (BWA) network is one of the most promising solutions to provide ubiquitous wireless access with high data rates, high mobility, and wide coverage. In the paper we develop a novel Connection Admission Control (CAC) algorithm for IEEE 802.16e mobile BWA networks to simultaneously improve the utilization efficiency of network resources and guarantee...
This paper introduces a novel admission control algorithm called dynamic measured sum (DMS), which is based on active measurements of the actual load. The kernel of the algorithm is the dynamical adjustment of the measurement period length, which hence enables a better matching to the traffic changes and results in an obvious improvement of delay performance. Furthermore, the multi-class admission...
Quality of Service (QoS) control and resource management in Next Generation Networks (NGN) is provided by a particular architecture called RACF (Resource and Admission Control Function) which has been introduced by ITU. In this paper, we propose a dynamic and scalable policy for RACF to manage the bandwidth reservation for arriving calls. This threshold based method will decrease processing load compared...
Although by default the Network Simulator 2 (NS2) does not implement the IEEE 802.16 networks, a few patches are available, that provide WiMAX specifications at different fidelity level. The ns2 environment is useful for system-level evaluation, but mainly with respect to wired networks. In order to provide an adequate QoS provisioning to different service flows and to prevent base station (BS) from...
With the increased deployment of WLAN access points (AP), the importance of IEEE 802.11x standard network is also increasing. Mass deployment of WLANs offers the advantage of increased QoS support for multimedia traffic by using an intelligent vertical handover technique combined with an advanced admission control algorithm. In this paper we analyze the performance of three different dynamic load...
Admission control and routing are two key mechanisms for advanced Quality of Service (QoS) and Traffic engineering (TE) support in the data networks. However, traditional QoS and TE solutions usually focus exclusively on routing to achieve network resource usage optimization, while often neglect to give adequate attention to admission control. To provide a more comprehensive solution, a novel approach...
We first introduce the basics of satellite communication systems including a generic design topology. We then focus on multimedia satellite networks, in which the forward link capacity may become a ldquobottleneckrdquo operating under multimedia traffic and dynamically changing channel conditions or other anomalies. We present the system trade-offs, design objectives, and motivation for developing...
Parallel transactional systems are systems that execute transaction tasks in multiple servers, with load-balancing. We consider time constraints on those tasks and the fact that the tasks run in milliseconds means that fast admission control should be used. We propose such an admission control approach. Although there are scheduler designs building and maintaining complete deadline feasible schedules...
This paper addresses the problem of joint admission control and power allocation in the downlink of a single-cell code-division-multiple-access (CDMA) wireless network. The objective is to maximize the user-capacity (or base station revenue), while meeting the strict quality-of-service (QoS) requirements of each admitted user. We prove that the global optimal solution can be found by performing admission...
The joint power and admission control problem is considered for a cognitive underlay scenario, under Quality of Service (QoS) constraints for both primary and secondary users. Primary users must be guaranteed a premium service rate, measured by their signal to interference plus noise ratio (SINR); secondary users, if admitted, should be provided with at least a basic service rate, and the number of...
Ethernet technology is being deployed in metro and wide area networks. However, despite recent evolutions, Ethernet cannot be considered a carrier class technology due mainly to the lack of facilities for efficient traffic engineering (TE). In this article, we propose a Flow-aware TE approach for carrier class Ethernet networks providing services like those defined by the Metro Ethernet Forum. The...
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