WebRef   Sitemap · Experts · Tools · Services · Newsletters · About

WAP: The Web for Cellphones and PDAs

Solutions Marketing Manager – New product marketing/management (technology) - PA Next Step Systems US-PA-Wayne Post A Job | Post A Resume

Developer News OpenOffice 3.2 Lands Amid Critical Changes Red Hat, IBM Firmly in KVM Virtualization Camp Red Hat Talks Up Open Source Cloud Plans

Bridging the gap

The two worlds of telecom network and Internet can be quite easily connected via a specialized WAP gateway:

The process resembles the way Web pages are served up:

1. The user presses a phone key related to a particular URL
2. The client sends the URL to the gateway using WAP protocols
3. The gateway translates the WAP request into an HTTP request
4. The Web server handles the request just like any other HTTP request. It either returns WML or HTML back to the gateway using standard Web techniques such as CGI or servlets.
5. The gateway receives the response on behalf of the client. HTML gets transcoded to WML if necessary, and WML and WMLScript get encoded into byte code that is then passed back to the client
6. The client receives the response in WML byte code and displays the first card in the deck to the user.

WAP browser war ahead?

While the WAP standard was quickly criticized as being too restrictive in its assumptions for device capabilities, it promises a relatively interoperable platform (in the current WAP version 1.1) that all major cellphone manufacturers agree on and adhere to. Glitches in the first implementations that caused different phones to recognize different mime types and image formats seem to be largely resolved. Unfortunately, this was before the PDA and PC worlds developed a stronger interest in the subject.

Now more WAP browser implementations with differing extensions and improvements are starting to appear, including from one company (or soon to be two companies) from Redmond, Washington. Arguments whether WML should be replaced with HTML, or XHMTL are being exchanged. Microsoft's micro-browser allegedly supports both, once again embracing and extending, as well as bloating the software into a mega-browser. Ring any bells? Those who do not learn from history are condemned to repeat it... But then again, Nokia does not look like it could become easily "Netscaped". You cross-browser experts out there, a new playing field seems to be emerging for you!

The latest from WebReference.com Browse > Site Contents - - - - - Experts * 3D Animation * Design * DHTML * Graphics * HTML * JavaScript * Perl * XML - - - - - Web Resources * Authoring * Design * Internet * Multimedia * Programming * Promotion - - - - - Services * Interviews * Newsletters * Reviews * Search * Tools Search Engine Optimization: Selecting and Embedding Keywords · Are Google's Language Translation Web Services Ready for Prime Time? · Installing and Using Meeplace, the Business Review CMS Sitemap · Experts · Tools · Services · Email a Colleague · Contact FREE Newsletters >   The latest from internet.com IBM DB2 10 for z/OS: Justifying the Upgrade · Living La Vida Colo: Choosing the Right Colocation Facility · FTC Concerns over Social Media Privacy Linger

Produced by Michael Claßen
All Rights Reserved. Legal Notices.

URL: http://www.webreference.com/xml/column12/4.html
Created: May 23, 2000
Revised: May 23, 2000