Information Technology Reference
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consists of a client authentication manager for web clients and server gateway
security manager for the users. The protocol converter to exchange informa-
tion among the different types of networks has a role of converting the HTTP
protocol packet format on the web client side into point-to-point protocol (PPP)
format on the vehicle gateway side and vice versa. The core engine consists of a
gateway manager, an event and history manager, and a database manager. The
gateway manager is in charge of managing the connection request, the gateway
configuration and the information transmission and reception. Finally, the event
and history manager has the role of an event analysis, a control command trans-
mission and execution, a reception data analysis, and a log file generation.
3.3.6.2 Gateway in UMTS and Sensor Network System
The main role of gateway is to translate and execute control commands
received from the UMTS network and web client. It cooperates with the sensor
network to help the remote client diagnosis and management performed. It
also provides the users with useful information that is sent from the control
server. As shown in Figure 3.8, the gateway consists of a wireless communi-
cation manager, a server-gateway security manager, a command filter, core
engine, and other application programs for users.
3.3.6.3 Sensor Node
In general, the sensor nodes are hardly collected and recharged for recycle
after they are deployed in the sensor field. Therefore, the power consump-
tion is one of the very significant constraints in the sensor nodes. However,
the sensor nodes deployed for communication with UMTS network have
a more important issue than the power consumption. The node structure
for the UMTS-based sensor network is shown in Figure 3.9. It consists of a
UMTS protocol processing module, a message processor, a sensor, and actu-
ator management module.
3.3.7 Summary
UMTS users could conveniently and quickly access the sensor network.
In this section, we have proposed the architecture for video transmission
from WSN to UMTS networks that allow an ad hoc PSN to communicate
with the CSN. However few researchers consider integration of the mobile
network infrastructure a sensor network. This section presented our new
approach, using the characteristics of sensor networks and mobile network
infrastructure to deliver sensor network signals. Furthermore, we build up
the platform and implement the video gateway. The advantages are that
communicating between these two systems dynamically and intelligently
can reduce the cost and increase the lifetime of sensor networks. It was also
shown that this approach is suitable for all organizations and for gathering
