FlashLinQ: a synchronous distributed scheduler for peer-to-peer ad hoc networks

  • Authors:
  • Xinzhou Wu;Saurabha Tavildar;Sanjay Shakkottai;Tom Richardson;Junyi Li;Rajiv Laroia;Aleksandar Jovicic

  • Affiliations:
  • Qualcomm New Jersey Research Center, Bridgewater, NJ;Qualcomm New Jersey Research Center, Bridgewater, NJ;Electrical and Computer Engineering Department, The University of Texas at Austin, Austin, TX;Qualcomm New Jersey Research Center, Bridgewater, NJ;Qualcomm New Jersey Research Center, Bridgewater, NJ;Charles Rivers Ventures, Cambridge, MA and Qualcomm New Jersey Research Center, Bridgewater, NJ;Qualcomm New Jersey Research Center, Bridgewater, NJ

  • Venue:
  • IEEE/ACM Transactions on Networking (TON)
  • Year:
  • 2013

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Abstract

This paper proposes FlashLinQ--a synchronous peer-to-peer wireless PHY/MAC network architecture. FlashLinQ leverages the fine-grained parallel channel access offered by OFDM and incorporates an analog energy-level-based signaling scheme that enables signal-to-interference ratio (SIR)-based distributed scheduling. This new signaling mechanism, and the concomitant scheduling algorithm, enables efficient channel-aware spatial resource allocation, leading to significant gains over a CSMA/CA system using RTS/CTS. FlashLinQ is a complete system architecture including: 1) timing and frequency synchronization derived from cellular spectrum; 2) peer discovery; 3) link management; and 4) channel-aware distributed power, data rate, and link scheduling. FlashLinQ has been implemented for operation over licensed spectrum on a digital signal processor/ field-programmable gate array (DSP/FPGA) platform. In this paper, we present FlashLinQ performance results derived from both measurements and simulations.