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6
Network architecture supporting
wireless applications
The Wireless Application Environment (WAE) architecture is designed to support Mobile
Terminals (MTs) and network applications using different languages and character sets.
WAE user agents have a current language and accept content in a set of well-known
character encoding sets. Origin server-side applications can emit content in one or more
encoding sets and can accept input from the user agent in one or more encoding sets.
Wireless Telephony Application (WTA) is an application framework for telephony services. The WTA user agent has the capability for interfacing with mobile network services
available to a mobile telephony device, that is, setting up and receiving phone calls.
The Wireless Application Protocol (WAP) Push framework introduces a means within
the WAP effort to transmit information to a device without a previous user action. In
the client/server model, a client requests a service or information from a server, which
transmits information to the client. In this pull technology, the client pulls information
from the server.
6.1 WAE ARCHITECTURE
The WAE architecture includes networking schemes, content formats, programming languages, and shared services. Interfaces are not standardized and are specific to a particular
implementation. WAE can work with a browser and a class of user agents used in the
World Wide Web (WWW).
In the Internet WWW, applications present content to a client in a set of standard
data formats that are browsed by client side user agents known as Web browsers. A user
agent sends requests for one or more data objects or content to an origin server, which
responds with the requested data expressed in one of the standard formats known to
the user agent [i.e., Hypertext Markup Language (HTML)]. The WWW logical model is
shown in Figure 6.1.
Mobile Telecommunications Protocols For Data Networks. Anna Hac´
Copyright 2003 John Wiley & Sons, Ltd.
ISBN: 0-470-85056-6