On the Interaction of Clocks, Power, and Synchronization in Duty-Cycled Embedded Sensor Nodes

摘要

thschmid@eecs.umich.edu;{zainul jf8,mbs}@ucla.edu;rshea@cs.ucla.edu;youngcho@isi.edu;;; The efficiency of the time synchronization service in wireless sensor networks is tightly connected to the design of the radio, the quality of the clocking hardware, and the synchronization algorithm employed. While improvements can be made on all levels of the system, over the last few years most work has focused on the algorithmic level to minimize message exchange and in radio architectures to provide accurate time-stamping mechanisms. Surprisingly, the influences of the underlying clock system and its impact on the overall synchronization accuracy has largely been unstudied.