To solve the problem of power supply in traditional wireless sensor network (WSN), a medium access control (MAC) protocol based on RF energy capture is proposed. Firstly, the time division multiple access (TDMA) technology is used to allocate channel according to time slot between adjacent nodes, so that data can be transmitted uncontested between source nodes and sink nodes. At the same time, the energy consumed by nodes in each cycle is controlled, and the duty cycle is adjusted indirectly. Then a load threshold is set in the buffer as the basis of each node’s role in the communication transformation to realize time synchronization between nodes. Finally, experimental simulations of various network topologies are carried out to evaluate delay rate and data loss rate. Experimental results show that, compared with the adaptive TDMA-based MAC (AT-MAC) protocol, the proposed protocol not only has lower latency rate, but also has a network simulation structure closer to the real network scenario, which can meet the performance requirements of wireless sensor networks.
LIU Leyu, WANG Zumin, ZHENG Zupeng, QIN Jing, JI Changqing
. MAC Protocol Design for RF-Powered Wireless Sensor Networks[J]. Journal of Applied Sciences, 2021
, 39(4)
: 672
-684
.
DOI: 10.3969/j.issn.0255-8297.2021.04.014
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