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The WiMAX system, based on the IEEE 802.16 standard offers a large degree of flexibility to allow optimal deployment in different scenarios. For that purpose it provides a large set of parameters to be configured and tuned. The paper introduces the main configuration parameters, to be planned ahead for a successful deployment of a mobile WiMAX system, and proposes a methodology to determine those...
DSA (dynamic spectrum allocation) techniques are very challenging when the quality of service has to be guaranteed in a flexible spectrum situation. In this paper, we present and analyze DSA policies for packet services in cellular context. A centralized model, where a meta-operator shares a common spectrum among different operators, is considered. We focus on two criteria for the policies design:...
IEEE P1900.4 is an emerging standard for optimized radio resource utilization where cognitive radio technologies are used for efficient spectrum utilization. In this paper, we design and implement a cognitive wireless network system based on open documents of IEEE P1900.4, and evaluate its performance using UDP streaming and HTTP download. Our experiments show interesting results that total network...
In a totally reconfigurable network, base stations can be viewed as amorphous entities that are dynamically configured to an optimal combination of radio access technologies based upon the time-varying user density and QoS requirements of the application traffic that they present or will present to it. In such a network, admission control is typically useful in providing load balancing and hotspot...
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