Mobile Networks and Management. 5th International Conference, MONAMI 2013, Cork, Ireland, September 23-25, 2013, Revised Selected Papers

Research Article

Route-Over Forwarding Techniques in a 6LoWPAN

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  • @INPROCEEDINGS{10.1007/978-3-319-04277-0_10,
        author={Andreas Weigel and Martin Ringwelski and Volker Turau and Andreas Timm-Giel},
        title={Route-Over Forwarding Techniques in a 6LoWPAN},
        proceedings={Mobile Networks and Management. 5th International Conference, MONAMI 2013, Cork, Ireland, September 23-25, 2013, Revised Selected Papers},
        proceedings_a={MONAMI},
        year={2014},
        month={6},
        keywords={6LoWPAN fragmentation 802.15.4 CometOS forwarding route-over wireless sensor networks},
        doi={10.1007/978-3-319-04277-0_10}
    }
    
  • Andreas Weigel
    Martin Ringwelski
    Volker Turau
    Andreas Timm-Giel
    Year: 2014
    Route-Over Forwarding Techniques in a 6LoWPAN
    MONAMI
    Springer
    DOI: 10.1007/978-3-319-04277-0_10
Andreas Weigel1,*, Martin Ringwelski1,*, Volker Turau1,*, Andreas Timm-Giel1,*
  • 1: Hamburg University of Technology
*Contact email: andreas.weigel@tuhh.de, martin.ringwelski@tuhh.de, turau@tuhh.de, timm-giel@tuhh.de

Abstract

6LoWPAN plays a major role within the protocol stack for the future Internet of Things. Its fragmentation mechanism enables transport of IPv6 datagrams with the required minimum MTU of 1280 bytes over 802.15.4-based wireless sensor networks. With the envisioned goal of a fully standardized WSN protocol stack currently necessitating a route-over approach, i.e. routing at the IP-layer, there are two main choices for any 6LoWPAN implementation with regard to datagram fragmentation: Hop-by-hop assembly or a cross-layered direct mode, which forwards individual 6LoWPAN fragments before the whole datagram has arrived. In addition to these two straightforward approaches, we propose enhancements based on adaptive rate-restriction for the direct forwarding and a retry control for both modes to reduce the number of losses of larger datagrams. Our evaluation of the basic and enhanced forwarding modes within simulations and a hardware testbed indicate that the proposed enhancements can considerably improve packet reception rate and latency within 6LoWPAN networks.