mca 14(5): e5

Research Article

Route-Over Forwarding Techniques in a 6LoWPAN

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  • @ARTICLE{10.4108/mca.2.5.e5,
        author={Andreas Weigel and Martin Ringwelski and Volker Turau and Andreas Timm-Giel},
        title={Route-Over Forwarding Techniques in a 6LoWPAN},
        journal={EAI Endorsed Transactions on Mobile Communications and Applications},
        volume={2},
        number={5},
        publisher={ICST},
        journal_a={MCA},
        year={2014},
        month={12},
        keywords={6LoWPAN, fragmentation, 802.15.4, CometOS, forwarding, route-over, wireless sensor networks},
        doi={10.4108/mca.2.5.e5}
    }
    
  • Andreas Weigel
    Martin Ringwelski
    Volker Turau
    Andreas Timm-Giel
    Year: 2014
    Route-Over Forwarding Techniques in a 6LoWPAN
    MCA
    ICST
    DOI: 10.4108/mca.2.5.e5
Andreas Weigel1,*, Martin Ringwelski2, Volker Turau1, Andreas Timm-Giel2
  • 1: Institute of Telematics, Hamburg University of Technology
  • 2: Institute of Communication Networks, Hamburg University of Technology
*Contact email: andreas.weigel@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 networks. With the 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. An evaluation of these modes in a simulation environment and a hardware testbed indicate that the proposed enhancements can considerably improve PRR and latency within 6LoWPAN networks.