Wap - Siemens A50 Service Manual

Wireless Application Protocol, WAP.
Wireless Application Protocol takes a client-server approach that uses the in-built micro-browser
to make a request, in wireless markup language (WML), for information or service. The request is
passed to a WAP Gateway, which then retrieves the information from a Internet server, in HTML
format, and translate it into WML. The requested information is then sent to from the WAP
Gateway to WAP client (mobile) using the available and most appropriate mobile network bearer
services.
Wireless Protocol Stack.
Wireless Application Environment (WAE)
Wireless Session Protocol (WSP)
Wireless Transaction Protocol (WTP)
Wireless Transport Layer Security (WTLS)
Wireless Datagram Protocol (WDP)
Bearers e.g. Data, SMS, USSD
TABLE 1..1 WAP PROTOCOL STACK
1. Wireless Application Environment
Defines the user interface on the phone. WAE contains the WML,WML script and the
wireless telephony application (WTA).
2. Wireless Session Protocol
Link the WAE to two session services – one connection oriented operating above the WTP
and a connectionless service operating above WDP.
3. Wireless Transaction Protocol
Runs on top of the datagram service and part of the standard suite of TCP/IP protocols, to
provide a simplified protocol suitable for low bandwidth mobile station.
4. Wireless Transport Layer Security
WTLS incorporates security features that are based upon the established Transport layer
Security (TLS) protocol standard, that include data integrity checks, privacy on the WAP
Gateway to client leg and authentication.
5. Wireless Datagram Protocol
Allows WAP to be bearer independent by adapting the transport layer of the under-laying
bearer. WDP presents a consistent data format to the higher layer on the WAP stack.
WAP Internet access via the A50 is possible with the inclusion of Wireless Application Protocol
(WAP) browser 1.2.1.
Note: The Asian variant phone (1168) does not support WAP.
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