Information Technology Reference
In-Depth Information
3.3.5.2 Internet Working Solutions
The UMTS network is connected over the Internet. The Internet working solu-
tion of our framework: connecting the sensor network to the Internet via the
UMTS network. The idea adopted in this solution is to obtain the data from
any local network anywhere. As mentioned earlier, in the SMS addressing
model, the SMS address format is compatible with Internet e-mail addresses,
and the WAP gateway is responsible for converting the PDU or SMS message
to HTTP format.
3.3.5.3 Power Consumption
Power consumption is highly critical in a sensor network. Location updating
enables the HLR to keep track of the subscriber's current location. The sensor
network is registered in the UMTS network and the location is then fixed.
Here, the power consumption in the message and Internet working solutions
can be minimized by preventing the location updating signals. Another solu-
tion is to use solar energy to supply power to the gateway.
3.3.6 Design of the gateway of uMTS and Sensor Network
The wire and wireless sensor network has a role of gathering the sensor sta-
tus data. The gateway does not only offer sensor status information to remote
users but also receives sensor control messages from the external network.
Figure 3.7 shows the structure of the UMTS and Sensor Network
Communication system proposed in this section. The system consists of the
IWF, control server, and the web-based client, which is connected to gateway
Control server
Sensor
Mobile terminal
Mobile terminal
Sensor
BTS
IWF
Gateway
Servers
Sensor
Mobile terminal
Web-Based client
Figure 3.7
UMTS and sensor network communication system structure. (From Du, Y., “UBI-Media”
Conference of IEEE, 2008. With permission.)
