Nokia SERIES 30 Benutzerhandbuch

 

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Wireless Application Environment (WAE) 

The Wireless Application Environment (WAE) is a general-purpose application environment that uses a 

combination of Internet and mobile terminal technology. It provides a framework for the 

development of applications on a mobile terminal. WAE contains support for the following 

functionality: 

• 

Wireless Markup Language (WML) - a lightweight presentation language, similar to Hypertext 

Markup Language (HTML) but optimized for use with mobile terminals. 

• 

Wireless Markup Language Script (WMLS) - a lightweight script language, similar to 

JavaScript™. 

• 

Wireless Telephony Application / Interface (WTA / WTAI) - telephony services and 

programming interfaces. 

• 

Content formats - defined data formats, such as vCard and vCalendar. 

Wireless Session Protocol (WSP) 

The Wireless Session Protocol (WSP) provides the application layer of WAP with an interface for two 

session services. The first is a connection-oriented service that operates above the transaction layer 
protocol. The second is a connectionless service that operates above a secure or non-secure datagram 

service. The WSP is optimized for low bandwidth bearer networks with long latency. 

Wireless Transport Protocol (WTP) 

The Wireless Transport Protocol (WTP) runs on top of the datagram service and provides a lightweight 

transaction-oriented protocol, suitable for use in mobile terminals. WTP operates over secure or non-

secure wireless datagram networks. 

Wireless Transport Layer Security (WTLS) 

Wireless Transport Layer Security (WTLS) is based on the industry standard Transport Layer Security 

(TLS) and is optimized for use over narrowband communication channels. WTLS may be used for 

secure communication between terminals, and applications can selectively enable WTLS features. 

Application developers can use the principles of WAP to develop new services or adapt existing 

Internet applications for use with mobile terminals. Applications are written in Wireless Markup 

Language (WML) and WMLScript, and stored on either a normal Web server (origin server) or directly 

on the WAP gateway. The content stored on the Web server is accessible from mobile terminals via the 

cellular network and a WAP gateway or proxy. 

The proxy server acts as a gateway between the cellular network and the Internet or Intranet. The 
data sent between the origin server and the handset is binary encoded to optimize transmission over 

the narrow bandwidth of the cellular network. Note that the content stored on the Web server might 

be in either textual or binary format. When the WAP gateway fetches textual content, it automatically 

compiles this to the encoded format to minimize network load. 

 

WAP Service Developer's Guide for Nokia Series 30 Phones with WML Browser

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