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Wireless PC-Based Services


  • Developing wireless Web applications: a complete guide for technical decision-makers
  • Wireless networks, standards, applications, programming, and business planning
  • Defining architectures, building development teams, choosing tools, and more
  • Security, fault tolerance, directories, and other key issues
  • ...
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  • Developing wireless Web applications: a complete guide for technical decision-makers
  • Wireless networks, standards, applications, programming, and business planning
  • Defining architectures, building development teams, choosing tools, and more
  • Security, fault tolerance, directories, and other key issues
  • Endorsed by leading wireless implementers at IBM, Motorola, and Roche

The up-to-the-minute Wireless Web briefing for every technical professional.

Wireless PC-Based Services is a complete briefing on Wireless Web technologies for every entrepreneur, decision-maker, and technical professional. IBM architect and leading wireless developer R. Scott Lewis covers every aspect of deploying wireless Internet services, from business plans through application design, standards through development tools.

Lewis presents in-depth coverage of state-of-the-art applications such as unified wireless inboxes, S.100-based wireless call processing, wireless message storage, wireless metering services, and wireless network management. The book also includes state-of-the-art coverage of wireless media conversion applications: language translation, text-to-audio, OCR, and handwriting-to-text. Coverage includes:

  • Wireless Web services: consumer, producer, and enterprise perspectives
  • Making sense of today's multiple wireless standards: analog to 3G, WAP to LDAP, SS7 to digital TV
  • Developing wireless services: building a team — and an organization
  • Vendor-neutral frameworks and architectures for advanced wireless services
  • Comparing languages and class librariesfor wireless development
  • Ensuring security and fault tolerance in wireless applications
  • Distributed batch processing, queuing, and other techniques for maximizing application performance
  • The role of directory services in wireless applications
  • Internet, Global Positioning Systems, paging, and messaging technologies

If you're responsible for next-generation wireless Internet services, this book will increase your effectiveness — and reduce your risks — at every stage of the project lifecycle.

"Mr. Lewis' book is always the first wireless book that I pick up when I need a thorough treatment of all phases of wireless systems."

—Rajnish Prasad, Senior IT Architect, IBM

"With these brilliant descriptions of possible service available to the wireless industry, Scott clearly takes his place as a leading developer in the wireless space."

Nathalie Plaziac, Ph.D. Electrical Engineering, Motorola

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Product Details

Meet the Author

R. Scott Lewis has 20 years of experience in developing, designing, and installing industrial-strength telecommunications services for Ericsson and other Fortune 100 companies. His wireless inventions range from text-to-speech-to-language converters to unified microbrowser inboxes. Currently an IT architect for IBM Global Services, Lewis is actively involved in The Open Group Wireless Task Force and the WAP Forum.
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Table of Contents

1 Introduction 1
2 Wireless Services Overview 5
3 Wireless Standards 17
4 Legal Strategies for Software Companies 101
5 Developing Wireless Services 105
6 Vendor-Neutral Framework for Wireless Services 125
7 Vendor-Neutral Framework for Wireless Security 145
8 Wireless Fault Tolerant System Example 157
9 Computer Language Performance for Wireless Services 163
10 The Unified Wireless Inbox 193
11 Wireless Call Processing (S.100) Service 199
12 Wireless Directory Services 207
13 Wireless Message Storage Service Based on E-Mail 231
14 Wireless Network Management Service 259
15 Wireless Metering Service with MQI 293
16 Media Conversion - An Exemplary Wireless Service 301
17 Distributed Batch Processing for Wireless Communications 391
18 Queuing Theory for Fixed and Wireless Communications 411
19 The Future of Wireless Services 427
Reference 437
Index 439
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1: Introduction

Purpose of Book

Convergence of the Internet with wireless information systems is neither well documented nor well understood. This book attempts to explain the basics on how to programmatically interface a PC to the technologies listed below for the purpose of facilitating services between them:
  • Analog Cellular Telephony
  • Digital Cellular Telephony
  • 3G (Third Generation) Digital Cellular Telephony
  • Enterprise Wireless
  • Internodal Wireless Messaging
  • Internet
  • Wide Area Paging
  • Personal Communication Services
  • Global Positioning Systems
Furthermore, the book concentrates on services that unify the aforementioned network types.

Tech Talk

NOTE: There is some overlap with the fixed network standards (i.e., SS7), but an effort was made to concentrate on the wireless networks.

For example, a service under Windows NT is explained that performs text-to-speech conversion for the purpose of retrieving a voice, fax, or e-mail message from your mobile terminal.

Last, the Internet Protocol suite was used to interconnect the various components and services, since it provides a vendor-neutral architectural framework, among other things.

Hence, it should be possible to use these same services on other platforms (e.g., LINUX) besides Windows NT.


This book is for the developer, entrepreneur, VAR, OEM, or technical-savvy manager.

A distinction between VAR and OEM is needed in order to clarify what is meant by integration as opposed to development.

Original Equipment Manufacturer

The maker of the equipment is marketed by another vendor, usually under the name of the reseller. The OEM may manufacture only certain components, or it may build complete computers, which are then often configured with software and/or other hardware by the reseller.1

Value Added Reseller

Typically, VARs are organizations that package standard products with software solutions for a specified industry. VARs include business partners ranging in size from providers of specialty turnkey solutions to larger system integrators.2

Typically, the OEM is a specialist that is responsible for developing a product, whereas the VAR is a manager responsible for integrating the product into the cus-tomers' facilities.

The operative word is "integration"—where does the integration by the OEM stop and where does it begin for a VAR?

For argument's sake, let's take the example of a unified messaging system. Here are the basic off-the-shelf components for unified messaging:

  • PC-Based Voice and Fax Processing System (i.e., Intel processor, Ether-net port, Dialogic D/12x and Fax/120 Boards,etc.) as the platform
  • Computer Telephony (CT) Application Generators for creating telephone answering interface
  • Electronic Mail Message Server Software for message storage
  • Web Server Software for browsing messages
Integration of these components was once difficult. An expert was needed in each of these fields: PC hardware, software, and networking for both Internet and Public Switched Telephone Network.

Now, however, the assembly is easier since the software is intelligent and user-friendly and getting easier by the day. No longer is a computer scientist needed to build a state machine for handling the incoming calls. Today, ordinary users with little to no expertise can create a new service just by reading the online help within a CT (computer telephony) application generator and, before long, they have a service.

Therefore, having made this distinction, successful VARs must be quick at identifying applications to turn up in their system, whereas successful OEMs must focus on creating a specific component while not losing sight of the bigger picture the VAR contends with. The forte of the OEM will determine the components they build. What this means is that the OEM will have specialized talents in one field or another.

What distinguishes one OEM from other OEMs are state-of-the-art advances, for example, being the first company to fax at 56Kbps or implementing some new standard of compression.

An OEM requires talented employees who really understand the technology. As soon as a company loses its talent, it is in jeopardy of becoming a VAR.

Quick Managerial Commentary

Avert the shift from OEM toVAR by way of proactive human resources intervention. Consider a new retention policy (e.g., try using better raises) or try hiring someone new.

However, don't be so quick to think you'll be able to find a replacement. According to Grady Booch, "Hyperproductive developers constitute less than about 1 or 2% of the entire development population." Furthermore, "hyperproductive developers are, on the average, 4 to 10 times more productive than the average developer."

If the company wishes to remain an OEM, it had better focus on keeping its talent. OEMs have the potential to sell products directly to the consumer, the government, or to VARs or operators. They are not precluded from selling services pertain-ing to their component.

VARS only have the potential to sell product to the consumer or the govern-ment. They typically don't have the talent to sell to OEMs.


The author assumes a basic knowledge of object-oriented concepts. Experience in both C and an object-oriented programming language is helpful.

Next Issue

Thought has been given to create another book geared for especially for ISPs (Internet service providers) and wireless operators, since their requirements are far more rigid as far as reliability and availability goes. In addition, subject areas such as voice recognition, speech-to-text, and language conversion were examined and are deemed within scope.

Modeling and Terminology

The terms used in this book are in accordance with the Unified Modeling Language 1.3. This is important when a question arises pertaining to a definition, notation, or semantics used heretofore, since the UML gives you a standard way to write a system's blueprints, covering conceptual things such as classes written in a specific programming language, database schemes, and reusable software components.

This was done intentionally so the author could focus on the business of wireless PC-based services.

Tech Talk

PRINCIPLE: Many organizations lack a documented process for devel-opment. The UML language and Rational Unified Process provide that in-frastructure. Using them raises the quality, capability, and maturity of any development team. Use them today in place of making your own.

The necessary documentation is available free on the Internet at

1 Newton, pg 695.

2 Newton, pg 1052.

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