Nokia 9110i Developer's Manual

Also see for 9110i Communicator: Application guide User manual

Contents

Nokia 9110i Developer's Manual Manual pdf 7 page image

7 (26)Wireless Mark-up Language (WML) - a lightweight presentation language, similar to HyperText Mark-up Language (HTML) but optimized for use with mobile terminals.Wireless Mark-up Language Script (WMLS) - a lightweight script language, similar to Java ScriptTM.Wireless Telephony Application / Interface (WTA / WTAI) - telephony services and programminginterfaces.Content Formats - defined data formats, such as vCard and vCalendar.2.2.3 Wireless Session Protocol (WSP)The Wireless Session Protocol (WSP) provides the application layer of WAP with an interface for twosession services. The first is a connection-oriented service that operates above the transaction layerprotocol. The second is a connectionless service that operates above a secure or non-secure datagramservice.The WSP is optimized for low bandwidth bearer networks with long latency.2.2.4 Wireless Transport Protocol (WTP)The Wireless Transport Protocol (WTP) runs on top of the datagram service and provides a lightweighttransaction-oriented protocol suitable for use in mobile terminals. WTP operates over secure or non-secure wireless datagram networks.2.2.5 Wireless Transport Layer Security (WTLS)The Wireless Transport Layer Security (WTLS) is based on the industry standard Transport Layer Security(TLS) and is optimized for used over narrow band communication channels. WTLS may be used forsecure communication between terminals, and applications can selectively enable WTLS features.2.3 Developing Applications with WAPApplication Developers can use the principles of WAP to develop new services or adapt existingInternet applications for use with mobile terminals. Applications are written in the Wireless Mark-upLanguage (WML) and the WMLScript, and stored on either a normal web server (origin server) ordirectly on the WAP Gateway. The content stored on the web server will be accessible from the mobileterminals via the cellular network and a WAP gateway or proxy.The Proxy Server acts as a gateway between the cellular network and the Inter/Intranet. The data sentbetween the origin server and the handset is binary encoded to optimize transmission over the narrowbandwidth of the cellular network. Note that the content stored on the web server might be in eithertextual or binary format. When the WAP gateway fetches textual content, it automatically compilesthis to the encoded format to minimize network load.Figure 2 shows the network-related elements required for developing and offering services to mobileusers.WirelessNetworkWAPProxyWTAServerBinary WMLBinaryWMLHTMLFilterWMLWMLHTMLWebServer