Route-over forwarding techniques in a 6LoWPAN

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.

Subjects

6LoWPAN

fragmentation

802.15.4

CometOS

forwarding

route-over

wireless sensor networks

DDC Class

600: Technik

620: Ingenieurwissenschaften

Lizenz

https://creativecommons.org/licenses/by/3.0/

Name

mca.2.5.e5.pdf

Size

586.02 KB

Format

Adobe PDF

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Route-over forwarding techniques in a 6LoWPAN