Abstract:

As a classical protocol based on wireless sensor networks MAC protocol, S-MAC has already aroused people's general concern. In terms of S-MAC fixed duty cycle mechanism, this paper provides DSMAC protocol, which based on load control of adaptive duty cycle adjustment MAC protocol. In DSMAC, set a node timer so as to dynamical adjust duty cycle through judging unit time load situation. This protocol aims at ameliorate S-MAC fixed duty cycle can not adapt to load variety, and excessive delay. We have simulated DSMAC through NS2, the results show that DSMAC can not only significantly improve the throughput, lower latency, but also effectively improve the energy efficiency, improve network performance while achieving energy saving purpose.

Key words: wireless sensor network, sensor media access control, duty cycle