Cross-layer scheduling and power control combined with adaptive modulation for wireless ad hoc networks

Wei Lan Huang, Khaled Letaief

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Efficient resource management is a major challenge in the operation of wireless systems, especially energy-constrained ad hoc networks. In this paper, we propose a cross-layer optimization framework to jointly design the scheduling and power control in wireless ad hoc networks. We study the system performance by combining scheduling, power control, and adaptive modulation. Specifically, the transmitted power and constellation size are dynamically adapted based on the packet arrival, quality of service (QoS) requirements, power limits, and channel conditions. A key feature of the proposed method is that it facilitates a distributed implementation, which is desirable in wireless ad hoc networks. The performance of our proposed methodology will be investigated in ad hoc networks supporting unicast as well as multicast traffic. Simulation results will show that the proposed scheme achieves significant gains in both the single-hop throughput and power efficiency compared with the existing method, which implements the scheduling through a central controller, and adopts power control with fixed modulation.

Original languageEnglish
Pages (from-to)728-739
Number of pages12
JournalIEEE Transactions on Communications
Volume55
Issue number4
DOIs
Publication statusPublished - Apr 2007
Externally publishedYes

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Keywords

  • Adaptive modulation
  • Cross-layer design
  • Distributed scheduling
  • Multicast
  • Power control
  • Unicast
  • Utility function
  • Wireless ad hoc networks

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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