Information Technology Reference
In-Depth Information
3.3.4.1 Network Interfaces
This is the communication layer. Two different communication technologies
will be supported by the gateway: the wide range interface and the short-
range communication interface. Examples of the short-range interface are
Bluetooth, ZigBee, IEEE 802.16, 802.1 1, proprietary RF, and GPRS. The wide
range is the UMTS interface.
3.3.4.2 Sensor Network Middleware
Sensor network middleware represents the central component of the gate-
way architecture. This is the layer that divides communication between the
sensors and the users, encapsulates the internal organization of the sensor
network, and provides API function to the users.
3.3.4.3 User Application
The user application layer employs the API functions that are provided by the
sensor network middleware. Depending on the application scenario, short-
range wireless communication links or the wide-area network are used for
communication between users and gateways.
3.3.5 The Solutions
This section considers the possible solutions incorporated in our framework
for the different components of the proposed framework. Our framework
solution is divided into a message solution and Internet working solution
techniques, as explained in the following sections. The aim of these solutions
is to receive data on demand at any time and anywhere throughout the
country, or to share these data with other organizations worldwide by using
Internet or e-mail technologies.
3.3.5.1 Message Solutions
This solution allows our framework to implement the SMS infrastructure
in a sensor network using the WAP, which was chosen for its features. This
solution allows the gateway to send the data that is gathered as SMS, which
can easily be received by any mobile phone in any location. The Wireless
Session Protocol (WSP) is used to transport the messages from the gateway
to the MMSC and from the MMSC to the gateway. It is responsible for the
general requirements, architecture, and functionality. The payload repre-
sents the SMS application layer PDU. See Table 3.1 for an example of PDU
encoding and decoding.
The process for sending an SMS from an SMS client to another SMS client
(data receiver) is explained below.
