Publication List

[117425]
Title: Route-Over Forwarding Techniques in a 6LoWPAN Proceedings of the 5th International Conference on Mobile Networks and Management (MONAMI 2013)
Written by: Andreas Weigel and Martin Ringwelski and Volker Turau and Andreas Timm-Giel
in: sep 2013
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on pages: 122--135
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Address: Cork, Ireland
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URL: http://pollux.et6.tu-harburg.de/614/
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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.