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.
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© 2013 ICST Institute for Computer Science, Social Informatics and Telecommunications Engineering
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Weigel, A., Ringwelski, M., Turau, V., Timm-Giel, A. (2013). Route-Over Forwarding Techniques in a 6LoWPAN. In: Pesch, D., Timm-Giel, A., Calvo, R.A., Wenning, BL., Pentikousis, K. (eds) Mobile Networks and Management. MONAMI 2013. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 125. Springer, Cham. https://doi.org/10.1007/978-3-319-04277-0_10
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DOI: https://doi.org/10.1007/978-3-319-04277-0_10
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