Route-over forwarding techniques in a 6LoWPAN

First published in
Lecture notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering  
Number in series
125 LNICST
Start Page
122
End Page
135
Citation
Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering, LNICST 125: 122-135 (2013)
Contribution to Conference
5th International Conference Mobile Networks and Management, MONAMI 2013  
Publisher DOI
10.1007/978-3-319-04277-0_10
Scopus ID
2-s2.0-85009461041
Publisher
Springer
ISBN of container
978-3-319-04277-0
978-3-319-04276-3
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 routeover 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.
Subjects
6LoWPAN
802.15.4
CometOS
Forwarding
Fragmentation
Route-over
Wireless sensor networks
DDC Class
004: Informatik