Open systems interconnection (rev. ed.): its architecture and protocols
Open systems interconnection (rev. ed.): its architecture and protocols
A framework for energy-scalable communication in high-density wireless networks
Proceedings of the 2002 international symposium on Low power electronics and design
Information Theory and Reliable Communication
Information Theory and Reliable Communication
Managing power consumption in networks on chips
IEEE Transactions on Very Large Scale Integration (VLSI) Systems
Handbook of Mathematical Functions, With Formulas, Graphs, and Mathematical Tables,
Handbook of Mathematical Functions, With Formulas, Graphs, and Mathematical Tables,
Linear transmit processing in MIMO communications systems
IEEE Transactions on Signal Processing - Part I
Analysis and results for the orthogonality factor in WCDMA downlinks
IEEE Transactions on Wireless Communications
Communication over fading channels with delay constraints
IEEE Transactions on Information Theory
A comparison of the HIPERLAN/2 and IEEE 802.11a wireless LAN standards
IEEE Communications Magazine
IEEE Journal on Selected Areas in Communications
Fundamental design issues for the future Internet
IEEE Journal on Selected Areas in Communications
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We consider the optimization of physical layer (PHY) and medium access control (MAC) layer radio parameters in a third generation multi-user mobile communication system like high speed downlink packet access (HSDPA). Following the need for efficient QoS compliant services the problem is formulated as a minimization of the average transmit power subject to constraints on the resulting quality of service, i.e. data throughput and delay. To this end we present analytical models for all regarded sublayers, i.e. spread spectrum signal processing, forward error correction coding, protocols and the MAC scheduling. We demonstrate how the resulting mapping from transmit powers to QoS parameters depends upon the regarded optimization parameters and how it can be inverted through a fast converging iterative computation of the systems outage probability and the offline inversion of an equivalent channel independent single-user problem. The obtained solution gives means to answer a service request with minimum resources. Numerical evaluations quantify the large potential power savings in a cellular setting with random traffic and demonstrate that the optimization of radio parameters has significant influence on the system capacity through the limited resource transmit power. An optimum mode selection as presented in this work thus allows for drastic load gains in HSDPA settings.