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Hardware-assisted IEEE 802.15.4 transmissions and why to avoid them
Publikationstyp
Conference Paper
Date Issued
2015
Sprache
English
Author(s)
Institut
TORE-URI
First published in
Number in series
9258 LNCS
Start Page
223
End Page
234
Citation
Internet and Distributed Computing Systems. IDCS 2015. Lecture Notes in Computer Science (9258): 223-234 (2015)
Contribution to Conference
Publisher DOI
Scopus ID
Publisher
Springer
6LoWPAN’s fragmentation mechanism enables transport of IPv6 datagrams with the required minimum MTU of 1280 bytes over IEEE 802.15.4-based networks. Testbed experiments showed disastrously bad datagram success rates for a collection traffic scenario with large, 6LoWPAN-fragmented datagrams, which significantly differed from the simulation results for a comparable scenario. In this paper we present an experimental setup that enables capturing the MAC and transceiver states of participating nodes in realtime. The results of our experiments show, that for the given fragmentation/collection scenario, the usage of the extended operating mode of the transceiver hardware, which provides CSMA/CA, ACKs and retransmissions in hardware, is responsible for nearly all datagram losses. Therefore, we strongly advise against using such hardware-assisted modes of operation in similar traffic scenarios.
Subjects
6LoWPAN
802.15.4
Extended operating mode
Forwarding
Fragmentation
Internet of things
TX_ARET