【摘要】 伴随着3G移动通讯的发展,IMS(IP多媒体子系统)出现使得为用户提供更快的数据传输率和丰富多彩的多媒体业务成为可能。文章对基于IMS的即时通讯在线状态服务的相关技术进行了研究;首先对在线状态服务系统组成及各模块功能进行了论述;然后对在线状态服务中所设计的主要流程进行了分析;最后对在线状态服务实现进行了总结。更多还原

【Abstract】 With the development of the third generation mobile communications,the birth of the IP Multimedia Subsystem(IMS) could provide users with faster data transfer and a variety of multimedia services.This paper studies some technologies related to the instant message presence service based on the IMS.The components of the presence service system and the functions of these components are explained,and then the main processes designed for the purpose of the presence service is analyzed.The implementation of the presence service system is also summarized.更多还原