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Appendix A. Wireless Application Protocol (WAP)
Introduction
The Wireless Application Protocol (WAP) is a set of protocols that allows the development of
applications and services for use with mobile phones and other mobile devices. The WAP Forum
maintains these protocols and their related standards and specifications.
The WAP Forum consists of a number of high-tech companies from the information technology,
software, and telecommunication industries. The objectives of the WAP Forum are to:
• Bring Internet content and advanced data applications to digital mobile 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
WAP Architecture
WAP and Internet architecture
In order to apply as much leverage to the existing Internet standard as possible, the WAP stack closely
follows the Internet model. This is illustrated in Figure 1A.
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 1A: Comparison of Internet and WAP architecture
This layered architecture allows applications to use the features of the WAP stack through well-
defined interfaces. This close link to the Internet architecture allows developers to use their existing
knowledge and expertise when developing applications for mobile terminals.
WAP Service Developer's Guide for Nokia Series 30 Phones with WML Browser
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