Scheduling mechanisms for rate adaptive multi-carrier spread-spectrum (MC-SS) transmission systems

Author

Lestable, Thierry ; Sdralia, Vaia ; Dodgson, Terence

Author_Institution

Adv. Technol. & Stand., Samsung Electron. Res. Inst., UK

fYear

2004

fDate

18-19 Nov. 2004

Firstpage

445

Lastpage

449

Abstract

We propose a framework for adaptive channel aware scheduling mechanisms for optimal power and rate adaptive (OPRA) multi-carrier spread-spectrum (MC-SS) systems that offers IP flexibility and maximizes the multiplexing efficiency of the system. In particular, we introduce a novel dynamic subcarrier allocation (DSA) scheme which is based on the derivation of the theoretical capacity of OPRA MC-SS systems with maximal ratio combining (MRC) and an imperfect channel estimate. We then compare three priority based scheduling mechanisms in terms of their multiplexing capability while using our DSA scheme. Based on these results, we finally introduce an adaptive scheduling algorithm.

Keywords

IP networks; adaptive scheduling; channel estimation; frequency allocation; multiplexing; optimisation; scheduling; spread spectrum communication; IP flexibility; MC-SS systems; MRC; adaptive channel aware scheduling mechanisms; adaptive scheduling algorithm; dynamic subcarrier allocation; imperfect channel estimate; maximal ratio combining; multiplexing capability; multiplexing efficiency; optimal power; rate adaptation; rate adaptive multi-carrier spread-spectrum transmission systems; Adaptive scheduling; Bandwidth; Digital video broadcasting; Diversity reception; Dynamic scheduling; Frequency diversity; Robustness; Scheduling algorithm; Spread spectrum communication; Standardization;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Signal Processing and Communication Systems, 2004. ISPACS 2004. Proceedings of 2004 International Symposium on

Print_ISBN

0-7803-8639-6

Type

conf

DOI

10.1109/ISPACS.2004.1439094

Filename

1439094