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  • Research Article
  • Open Access

Position-Based Relaying with Hybrid-ARQ for Efficient Ad Hoc Networking

EURASIP Journal on Wireless Communications and Networking20052005:734983

  • Received: 15 June 2004
  • Published:


This paper presents and analyzes an integrated, cross-layer protocol for wireless ad hoc networking that utilizes position location (e.g., through an onboard GPS receiver) and jointly performs the operations of network-layer relaying and link-layer ARQ-based error control. The protocol is a modified version of the hybrid-ARQ-based intra-cluster geographically-informed relaying (HARBINGER) protocol (2005) and unifies the concepts of geographic random forwarding (GeRaF) (2003), point-to-point hybrid-ARQ (2001), and cooperative diversity (2004). The modification makes the protocol especially suitable for sensor networks whose nodes cycle in and out of sleep states and permits a closed-form analysis. Performance bounds and simulations indicate the potential for a dramatic improvement in the tradeoff between active node density and end-to-end message delay as compared with the GeRaF protocol and are used to motivate further study of practical implementation issues.


  • relay networks
  • ad hoc networking
  • cross-layer protocols
  • hybrid-ARQ
  • GeRaF

Authors’ Affiliations

Lane Department of Computer Science and Electrical Engineering, College of Engineering and Mineral Resources, West Virginia University, Morgantown, WV 26506-6109, USA


© B. Zhao and M. C. Valenti 2005

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.