Hybrid Timeslot Design for IEEE 802.15.4 TSCH to Support Heterogeneous WSNs
conference paper
The IEEE 802.15.4 Time-Slotted Channel Hopping (TSCH) protocol defines two types of timeslots for communications, namely dedicated and shared timeslots. An upper layer in the protocol stack uses these timeslots to design a communication schedule for the network links, based on the required bandwidth for each link. Considering a network with time-varying data traffic generation by each node, the bandwidth requirements are changing over time for each link. This leads to poor efficiency of a predefined schedule when there is no data traffic for the dedicated timeslots, or there is too much data traffic injected to the shared timeslots. In this paper, we propose a new type of timeslot, called hybrid timeslot. A hybrid timeslot acts as a dedicated timeslot for a specific link, when there are packets available to be transmitted on that link. Otherwise, it acts as a shared timeslot that can be accessed by other links, using a contention-based mechanism. The hybrid timeslot has backward compatibility with the TSCH protocol and is functional with a few adaptations in the parameter setup of the TSCH protocol. Experimental and simulation results show that for heterogeneous networks using hybrid timeslots improves communication latency without reliability penalty. © 2018 IEEE.
Topics
TNO Identifier
861881
ISBN
9781538660096
Publisher
Institute of Electrical and Electronics Engineers Inc.
Article nr.
8580990
Source title
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC, 29th IEEE Annual International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2018, 9 September 2018 through 12 September 2018
Files
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