Wireless Metropolitan Area Networks based on IEEE 802.16d/e standards are soon to be deployed in several countries. However, there is lack of published literature with results from actual testbeds. This paper introduces the work done in the EU Sixth Framework Programme Project WEIRD to design and set up WiMAX testbeds in four EU countries. We describe the methodlogy followed, detail our implementation and present results from the testbeds, as deployed in the first phase of WEIRD. The testbeds are used to demonstrate how WiMAX technology can be used to extend the connectivity of the panEuropean data communications network (GEANT2) to isolated and impervious areas and, furthermore, to assure end-to-end quality of service to novel applications.
This paper presents an innovative procedure to solve the Connection Admission Control Problem for a telecommunication network. Here, this important problem in the context of Communication Theory and Network Dynamics is dealt with by imbedding it in the framework of System and Control Theory. Highlights of the procedure are technology independence, coordinated and coherent decoupling, optimality and feedback properties, stochastic dynamic control. (C) 2009 Elsevier Ltd. All rights reserved
The IEEE 802.16 standard provides a specification for a fixed and mobile broadband wireless access system, offering high data rate transmission of multimedia services with different Quality-of-Service (QoS) requirements through the air interface. The WiMAX Forum, going beyond the air interface, defined an end-to-end WiMAX network architecture, based on an all-IP platform in order to complete the standards required for a commercial rollout of WiMAX as broadband wireless access solution. As the WiMAX network architecture is only a functional specification, this paper focuses on an innovative solution for an end-to-end WiMAX network architecture offering in compliance with the WiMAX Forum specification. To our best knowledge, this is the first WiMAX architecture built by a research consortium globally and was performed within the framework of the European IST project WEIRD (WiMAX Extension to Isolated Research Data networks). One of the principal features of our architecture is support for end-to-end QoS achieved by the integration of resource control in the WiMAX wireless link and the resource management in the wired domains in the network core. In this paper we present the architectural design of these QoS features in the overall WiMAX all-IP framework and their functional as well as performance evaluation. The presented results can safely be considered as unique and timely for any WiMAX system integrator.
In this paper is presented an architecture for the control of wireless resources in a WiMAX access network, designed within the IST WEIRD project. Starting from WiMAX Forum architecture, new software modules have been introduced in the Control plane in order to manage data flows in WiMAX access networks. The proposed solution allows to guarantee the requested QoS to data flows. Interaction between the Control plane and the Transport plane is realized in a equipment vendor independent way, thanks to the introduction of an Adaptation layer between the Control plane and the IEEE 802.16 MAC layer.
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