Nokia SERIES 30 Benutzerhandbuch

Forum.Nokia.com

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

HTTP

TLS - SSL

TCP/IP

UDP/IP

SMS USSD

CSD

IS-136 CDMA CDPD PDC-P Etc..

Bearers:

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