![](bg6.png)
discovery request is flooded to all nodes. The service
discovery messages add extra transmission cost.
Besides, it brings extra workload for sensor nodes to
support the reply of service discovery messages.
The work of Jong-Wan et al., (2009) is the most
similar one. Their system composes of a main server
and several sensing servers connecting with different
sensor networks, which resemble our gateway and
adapters respectively. But in their system, most tasks
are completed by network-dependent sensing servers
other than main server. This means that most of the
tasks are left to users.
8 CONCLUSIONS
This paper has presented a plug-configure-play
service-oriented gateway, aiming to make it fast and
easy to develop various external sensor network
applications. The gateway encapsulates data,
capabilities and information of heterogeneous sensor
networks to homogenous resources. Access of those
resources is service it provides to external
applications through friendly and uniform interfaces
independent of types of sensor networks. The
gateway is not for specific kinds of sensor networks
or applications. Its feature of plug-configure-play is
achieved by separating the universal program and
sensor network specific information. It’s promising
in stimulating the emergence and prosperity of
external application markets.
ACKNOWLEDGEMENTS
This paper is supported in part by Important
National Science & Technology Specific Projects
under grant No.(2010ZX03006-002 ,
2010ZX03006-007), the National Basic Research
Program of China (973 Program) (No.
2011CB302803), and National Natural Science
Foundation of China (NSFC) under grant
No.(61173132,61003307). The authors alone are
responsible for the content of the paper.
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