Nokia 9110i - Manual (Page 6)

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2. WIRELESS APPLICATION PROTOCOL - WAP
2.1 Introduction
The Wireless Application Protocol (WAP) is a set of protocols that allow the development of
applications and services for use with Mobile Phones and other mobile devices. These protocols and
their related standards and specifications are maintained by the WAP Forum.
The WAP Forum consists of a number of hi-tech companies from the Information Technology, Software
and Telecommunications industries. The objectives of the WAP Forum are to:
• Bring Internet content and advanced data applications to digital cellular phones.
• Create a global wireless protocol specification that works across different wireless network
technologies.
• Enable the creation of content and applications that scale across a wide range of bearer networks
and device types.
• Embrace existing standards and technology wherever possible.
2.2 WAP Architecture
2.2.1 WAP and Internet Architecture
In order to leverage on the existing Internet standard as much as possible, the WAP stack closely
follows the Internet model. This is illustrated in Figure 1.
Internet
HTML
JavaScript TM
HTTP
TLS - SSL
TCP/IP
UDP/IP
SMS USSD CSD IS-136 CDMA CDPD PDC-P Etc..
Bearers:
Wireless Application
Wireless Application
Environment (WAE)
Wireless Session Layer (WSP)
Wireless Transport Layer Security (WTLS)
Wireless Datagram Protocol (WDP)
Other Services
and
Applications
Wireless Transaction Protocol (WTP)
Figure 1 – Comparison of Internet and WAP Architecture
This layered architecture allows applications to utilize the features of the WAP stack through well-
defined interfaces. This close link to the Internet architecture allows developers to utilize their existing
knowledge and expertise when developing applications for mobile terminals.
2.2.2 Wireless Application Environment (WAE)
The Wireless Application Environment (WAE) is a general-purpose application environment that uses a
combination of Internet and mobile terminal technology. It provides a framework for the development
of applications on a mobile terminal.
The WAE contains support for the following functionality: