2013 EJRNL PP Trang Minh Cao - 1.pdf
]
Terbatas Irwan Sofiyan
» ITB
Terbatas Irwan Sofiyan
» ITB
This paper proposes the DISON framework, a generic management system for Wireless
Sensor Networks (WSNs). The first objective of the DISON framework is to allow sensor
nodes to adapt autonomously to changes in application requirements and network
resources. The second objective is to provide a framework that enables both the developer
and the administrator of WSNs to choose what management functions to perform, what
conditions should trigger sensor nodes’ adaption, and how to adapt in both the development
and run-time stages. To achieve these objectives, firstly we propose a multilevel
management mechanism where every sensor node is empowered to participate in the
management process at different levels according to its resources. Then, we explain how
sensor nodes can be self adaptive by defining two data models, a context model and a policy
model. We also discuss how context is validated and how it is used to trigger policies.
We then present two management functions that can be applied to most applications, the
monitoring function and the resource allocating function. We implement DISON in TinyOS
operating system as an independent component which can interact with user applications
and other network components through public interfaces. The feasibility of the resource
allocating function is evaluated on a 26-node indoor testbed. The results of the experiments
show that DISON can not only resolve the management problems but also improve
network performance such as packet delivery rate or energy consumption. Finally, through
experiments in another testbed with different number of nodes, we demonstrate the
scalability of DISON.