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Mobile WiMAX's scheduling service is a key factor in Radio Resource Management (RRM) in realizing Quality of Service (QoS). The choice in scheduling algorithm for Mobile WiMAX base stations, albeit outside of the scope of the standard, critically impacts the performance and robustness of Mobile WiMAX networks. This paper provides an in-depth study of four major scheduling algorithms: Round Robin (RR),...
The primary concern of broadband wireless technologies is to provide the end-to-end Quality of Service (QoS) for integrated real-time and non real-time applications. The main focus of the IEEE 802.16d/e MAC layer is to manage the radio recourse in an efficient way. The basic functional blocks of the QoS model are addressed by the standards to support five different types of service classes. However,...
Frequency is amongst the most exclusive and most costly resources in wireless communication networks, especially, while considering the demands of broadband wireless access (BWA). In BWA, the management of frequency distribution and its effective utilization is of utmost importance. This research explores possible ways to ensure the most effective allocation of bandwidth resources and their best possible...
Multimedia flows transport over multiple IP domains requires quality of services (QoS) guarantees. In multi-domain contexts, the end-to-end QoS assurance needs cooperation of several resource management entities. Cooperation of the domains but also preservation of each domainpsilas autonomy are both required. This paper presents results on functional validation of a multiple domain overlay-developed...
This paper presents the architecture, design, implementation and samples of tests performed on a testbed for IEEE 802.16/WiMax access technology while used in a multi-domain environment IP networks. The final target was to implement a system capable to offer connectivity services, with different levels of end to end QoS guarantees, adaptable to different applications. Flexible solutions are proposed...
IEEE 802.16 is a promising technology in broadband wireless access area. In multiservice IEEE 802.16 network, connection admission control (CAC) plays a critical role for resource management and QoS guarantee. In this paper, a statistical CAC mechanism is proposed for IEEE 802.16 network. In order to avoid the QoS degradation, the proposed CAC mechanism considers the traffic variability and overflow...
WiMAX technology is a good candidate to provide broadcast TV services for mobile users because it supports QoS based multicasting functionality. To provide multicast-based TV services over the mobile WiMAX network, a multicast session setup involves both MAC-layer and IP-layer multicast management. However, in mobile environment, IP-layer multicast management entails service interruption due to unreliable...
In network development problems can be encountered considering plans and projects that will provide satisfying QoS for different circumstances, different types of users, and different traffic flow profiles. It is necessary to develop satisfying mathematical model which will provide connections between QoS and network parameters. In this paper we will look into traffic with variable intensity which...
In this paper, we investigate slot allocation for diverse quality of service (QoS) types in orthogonal frequency division multiple access (OFDMA) based IEEE 802.16e wireless MAN systems. For a downlink scenario, we propose flow metrics that dynamically capture the extent to which flows of diverse QoS types merit bandwidth allocation. Using these flow metrics, we propose a scheduling rule for a mixture...
RSVP faces challenges from resource-engross and switching or thrashing when in handover process, especially when in group mobility and for multimedia applications. This paper proposed a scheme on seamless handover, developed a context transfer mechanism that can keep access routers and home agent informed of handover, AAA and QoS messages before anticipated handover. And a simplification to the HO...
Integrated management architecture for FMC based on IMS/NGN is overviewed with WiBro which is a new and promising access technology that supports end-to- end QoS with SBLP. KT's integrated control platform for FMC services is described as well.
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