A combined power-controlled protocol with adaptive MIMO gains for wireless networks

Mohammad Z. Siam, Marwan Krunz

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Transmission power control (TPC) is used in wireless networks to improve channel reuse and/or reduce energy consumption. It has been applied mainly to single-input single-output (SISO) systems, where each node is equipped with a single antenna. Multi-input multi-output (MIMO) systems can improve the throughput or the signal-to-noise ratio (SNR) by providing multiplexing or diversity gains, respectively. In this paper, we propose a power-controlled MAC protocol that combines different types of MIMO gains in a wireless network with two antennas per node. Our protocol, coined CMAC, allows for dynamic switching between diversity and multiplexing modes so as to maximize a utility function that depends on both the energy consumption and throughput. CMAC adapts the "antenna mode," the transmission power, and the modulation order on a per-packet basis. By "antenna mode" we mean one of the five possible transmit/receive antenna configurations: 1×1 (SISO), 2×1 (MISO-D), 1×2 (SIMO-D), 2×2 (MIMO-D), and 2×2 (MIMO-M), where the second, third, and fourth configurations offer a diversity (D) gain, whereas the last configuration offers a multiplexing (M) gain. By using control packets to bound the transmission power of potentially interfering terminals, CMAC allows for multiple interference limited transmissions to take place in the vicinity of a receiving terminal. We study via simulations the performance of CMAC in ad hoc topologies. Our results indicate that relative to nonadaptive protocols, CMAC achieves a significant improvement in both the overall energy consumption and the throughput.

Original languageEnglish (US)
Title of host publicationProceedings of the 4th International Conference on Broadband Communications, Networks, Systems, BroadNets
Pages789-798
Number of pages10
DOIs
StatePublished - Dec 1 2007
Event4th International Conference on Broadband Communications, Networks, Systems, BroadNets - Raleigh, NC, United States
Duration: Sep 10 2007Sep 14 2007

Publication series

NameProceedings of the 4th International Conference on Broadband Communications, Networks, Systems, BroadNets

Other

Other4th International Conference on Broadband Communications, Networks, Systems, BroadNets
CountryUnited States
CityRaleigh, NC
Period9/10/079/14/07

Keywords

  • Ad hoc networks
  • Diversity gain
  • MIMO
  • Multiplexing gain
  • Power control

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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  • Cite this

    Siam, M. Z., & Krunz, M. (2007). A combined power-controlled protocol with adaptive MIMO gains for wireless networks. In Proceedings of the 4th International Conference on Broadband Communications, Networks, Systems, BroadNets (pp. 789-798). [4550514] (Proceedings of the 4th International Conference on Broadband Communications, Networks, Systems, BroadNets). https://doi.org/10.1109/BROADNETS.2007.4550514