Wireless sensor networks are composed of large num-
bers of tiny networked devices communicate unteth- mà
ered. For it is important, large scale networks to thể
to dynamically download code vào network. In this
paper present chúng Contiki, a lightweight operating system
with support for dynamic loading and replacement of in-
dividual programs and services. Contiki is built around an
event-driven preemptive kernel but provides optional Multi-
threading có thể áp to the individual processes. We
show loading and unloading dynamic mà is feasible in a
resource constrained environment, while keeping the base
system lightweight and compact.
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