Enhanced time-slotted channel hopping in WSNs using non-intrusive channel-quality estimation
conference paper
Cross-technology interference on the license-free ISM bands has a major negative effect on the performance of Wireless Sensor Networks (WSNs). Channel hopping has been adopted in the Time-Slotted Channel Hopping (TSCH) mode of IEEE 802.15.4e to eliminate blocking of wireless links caused by external interference on some frequency channels. This paper proposes an Enhanced version of the TSCH protocol (ETSCH) which restricts the used channels for hopping to the channels that are measured to be of good quality. The quality of channels is extracted using a new Non-Intrusive Channel-quality Estimation (NICE) technique by performing energy detections in selected idle periods every timeslot. NICE enables ETSCH to follow dynamic interference well, while it does not reduce throughput of the network. It also does not change the protocol, and does not require non-standard hardware. ETSCH uses a small Enhanced Beacon hopping Sequence List (EBSL) to broadcast periodic Enhanced Beacons (EB) in the network to synchronize nodes at the start of timeslots. Experimental results show that ETSCH improves reliability of network communication, compared to basic TSCH and a more advanced mechanism ATSCH. It provides higher packet reception ratios and reduces the maximum length of burst packet losses. cop. 2015 IEEE.
TNO Identifier
535460
ISBN
9781467391009
Publisher
Institute of Electrical and Electronics Engineers Inc.
Article nr.
7366935
Source title
12th IEEE International Conference on Mobile Ad Hoc and Sensor Systems, MASS 2015, 19 October 2015 through 22 October 2015
Pages
217-225
Files
To receive the publication files, please send an e-mail request to TNO Repository.