USSD网关的设计与实现

Design and Implementation of USSD Gateway

非结构化补充数据业务 USSD(U nstructured Supplem entary Service Data)是一种基于 GSM移动通信网络的新型交互式会话业务 ,该业务能够在非 WAP(Wireless Application Protocol)设备上提供类似 WAP手机的上网功能 .面向连接是 U SSD业务的重要特点 ,该特点使通信双方在通信过程中能够建立会话 ,进而实现了通信的实时性和交互性 .文中对 USSD业务概念、流程及特点作了阐述 ;提出了用 USSD网关来实现 USSD业务的思想 ,并给出了一个符合USSD业务规范的具体实现 .其中对 USSD网关通信结构。

Unstructured Supplementary Service Data (USSD) is a new GSM service which provides high speed interactive communication between the applications and subscribers across the GSM network. USSD service allows subscriber to access ISP with a WAP like mechanisim but on a non WAP handset. USSD related definitions,dataflows and characters are introduced in this paper. The paper also describes the implementation of important modules of USSD gateway especially the implementation of the communication structure ,interactivity and realtime.