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Wap site development
Advancement from e-mail
to wireless technology has a great impact on the age of convergence. WAP enabled
web site design and development is the requirement of the day.
The Wireless Application Protocol (WAP)
is a set of protocols that work with existing standards to make
the Internet accessible through digital wireless devices (typically
mobile phones - surfing the web with a mobile phone.).Portals
accessible through mobile phones are called mortals.
Development is done using WML
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Working of WAP
WAP introduces a third element, a gateway or proxy server, into the
conversation. The wireless client sends requests to this gateway,
and the gateway in turn requests from the server on the wireless client's
behalf. The gateway acts as the interpreter in the conversation between
the server and wireless client translating between WAP and HTTP. Communication
between the gateway and the origin server is carried out in HTTP 1.1,
just as any normal web communication is done. Encoders and decoders
located in the gateway reduce the size of information packets to be
sent to the wireless client. The main differences in this model are
on the side of gateway to client communication |
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| The Web architecture is in different
layers
WAE (Wireless Application Environment)
This layer gives the user interoperability with the web
via the micro-browser. A combination of Internet and Mobile Telephony
technologies reside in this layer in order to provide a wide range
of functionality . WML, WML Script and Wireless Telephony Applications
(WTA and WTAI) reside in the WAE.
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WSP (Wireless Session Protocol)
Includes services for browser applications for the wireless
client. Basically, an optimized binary form of HTTP 1.1 with the ability
to suspend, resume, and migrate sessions. This layer provides the
immediate tools for the micro-browser to use in the transfer of information. |
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WTP (Wireless Transaction Protocol)
Provides the mechanism for three types of transaction: unreliable
one-way requests, reliable one-way requests, and reliable two-way
request-reply. These are asynchronous in performance. |
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WTLS (Wireless Transport Layer
Security)
Based on TLS (Transport Layer Security) for the World Wide
Web, WTLS provides data integrity, privacy, and authentication services.
This includes encryption and decryption for secured transactions. |
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WDP (Wireless Datagram Protocol)
This layer provides the upper layers with the services of
the underlying bearers establishing a means of data throughput. This
layer is completely transparent to the user. |
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