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Video traffic over cellular and broadband wireless access networks has been rapidly increasing in the recent years. To ameliorate the effect of this increase at wireless bottleneck links, we design and implement the first farsighted flow management framework, called MESA. During periods of network overload, MESA attempts to maximize the long-term quality of experience for each user. MESA has three...
The following topics are dealt with: wireless sensor network; MIMO; RFID network; radio resource management; cognitive radio; quality of service; coding; modulation; equalization; mobile ad hoc network; hybrid network communication; WiMAX; distributed radio theory; and wireless access technique.
Next generation mobile radio networks of IMT Advanced systems family will offer ubiquitous broadband high area coverage, at up to 1 GBit/s in cities and 100 MBit/s in rural areas and QoS support in terms of throughput and low delay. Candidate technologies like 3GPP-LTE, WiMAX, as well as the WINNER system design are based on OFDMA transmission for flexible radio resource allocation, scalable and adaptable...
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...
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....
Explosive development of multimedia services in actual data networks and the increasing demand for service quality stimulate the interest in the QoS management research. In order to ensure the service quality for multimedia flows crossing heterogeneous domains several resource management entities should cooperate to fulfill this task. In this paper we will present a QoS management system for WiMAX...
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...
In an environment where IEEE 802.16 access networks are used as a backbone for a heterogeneous wireless access network, the question of Quality of Service brings along a questioning on several other aspects: scalability, guarantees, scheduling among others. We give in this paper a general solution answering those questions. This solution is based on an aggregated bandwidth management in the backbone...
IEEE 802.16 networks provide mechanisms for QoS support at MAC level, but end-to-end QoS issues are not addressed in detail in the standards. This paper presents an analysis and an experimental validation of a comprehensive solution that describes and implements end-to-end QoS in networks with IEEE802.16e segments. A complete QoS model has been specified, defining the traffic descriptors, the QoS...
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