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A cross-layer mechanism for the performance improvement of real-time applications over IEEE 802.16e networks is proposed. The mechanism coordinates i) adaptation capabilities at different layers of the protocol stack, and ii) the handover initiation procedure. It uses information from the physical (PHY) and medium access control (MAC) layers to determine the appropriate burst profile, transmission...
A cross-layer mechanism to improve the performance of real-time applications over IEEE 802.16e metropolitan area networks is presented. The proposed mechanism uses channel quality and service quality information from the physical and medium access control layers, respectively, to determine the most suitable burst profile, transmission power level and media encoding rate for a connection, or even initialize...
Lately, cross-layer design in wireless networking has met significant interest. Thus, in the recent literature many cross-layer designs for the performance improvement of a variety of wireless communication networks can be found. In this paper, we describe the notion of cross-layer design, note its significance for wireless communication networks and provide a state of the art containing indicative...
In this paper a cross-layer adaptation mechanism for real-time broadband multimedia over IEEE 802.16e networks is presented. The proposed mechanism coordinates adaptations of the modulation order, transmission power and media encoding rate utilizing information provided by the Physical (PHY) and Medium Access Control (MAC) layers. Simulations show that the use of the proposed mechanism results in...
In this paper we propose and study a cross-layer mechanism that can improve real-time QoS provisioning over IEEE 802.16 metropolitan area networks. This mechanism utilizes information provided by the Physical and MAC layers and using a heuristic algorithm it derives new operational parameters for the Physical and Application layers, which can improve the performance of real-time applications. The...
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