WAP平台解决方案.pdf

建立發展WAP應用程式的 平台 • 演 講 者: 汪益賢 • 日 期: 2001年7月22日 • 參考論文: – M. Cannatard and D. Pascum, An Object- Base Architecture for WAP-Compliant Applications, IEEE, Database and Expert Systems Applications, 2000. Proceedings. 11th International Workshop on, 2000 Page(s): 178 -185 – 許註翔, WGFC-WAP遊戲開發平台,2001 Outline • Introduction • An architecture for WAP-compliant application • WAP Game Foundation Classes • Conclusion Introduction(1/6) • Value Added Mobile Services vs. Fixed Network Services –mobile access –time and location independent service access –different possibilities to access data(push, pull) Introduction(2/6) • Constraints of wireless networks –low bandwidth –high latency –unsteady connection –high transmission bit error rate –low predicable service availability Introduction(3/6) • Constraints of wireless terminals –small, low resolution displays –limited user-input –limited computational resources(CPU, RAM) –many kinds of terminals Introduction(4/6) • WAP(Wireless Application Protocol) –deployed by WAP Forum in 1997 (Ericsson, Nokia, …) –use WML, a simplified data description language • card • deck Introduction(5/6) • Basic components of the WAP framework μ – –browser(WML user-agent) – WAP gateway •Wireless network - data networks – a layered stack of WAP protocols •WAE, WSP, WTP, WTLS, WDP Introduction(6/6) • WAP gateway –protocol conversion(WAP - HTTP) –format conversion(HTML - WML) • Software modules for gateway and mobile terminal communication –Encoder –Decoder WAP 應用 • 個人