Cross layer analysis of buffered adaptive multicarrier transmission

Lin Yang*, Mohamed Slim Alouini

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Adaptive transmission can maximize the average information rate on a time-varying channel for a given power constraint and target bit error rate (BER), by adapting certain parameters of the transmitted signal to the temporal variations of the channel. This rate-adaptation idea has been extended to systems in which multi-carrier transmissions are used to combat frequency selective multipath fading. Since the outage probability of such schemes can be quite high, especially for channels with low average signal-to-noise ratio (SNR), adaptive systems require buffering of the input data. Because separate-layer consideration may not be appropriate for the time-varying wireless channels, this design challenge prompts a new design methodology that jointly optimizes the allocation of system resources though a cross-layer design. In this paper, we conduct a cross-layer performance analysis of an adaptive multicarrier transmission system with a finite buffer. We formulate such system as a M/G/1 queue in which the departure rates form a discrete set. We then derive an upper bound and a lower bound to the buffer overflow probability. We also obtain the mean waiting time to quantify the average delay experienced by data in the system. With these results, we establish a link between the physical layer design criteria such as the transmission rate and the reception error rate and those of higher layers. Numerical examples are also provided and discussed to illustrate the mathematical formalism and the effects of various system narameters.

Original languageEnglish (US)
Pages (from-to)4767-4771
Number of pages5
JournalIEEE Vehicular Technology Conference
Volume60
Issue number7
StatePublished - 2004
Externally publishedYes

Keywords

  • Adaptive Transmission
  • Cross-layer Design
  • Finite Buffer
  • Multicarrier Transmission
  • Overflow Probability
  • Waiting Time

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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