CoGIS系统中通信子系统的设计与实现  

Design and Implementation of Communication Sub-System GoGIS System

作　　者：胡雪莲[1] 程承旗[1] 马蔼乃[1] 吴宁[1] 

机构地区：[1]北京大学遥感所,北京100871

出　　处：《计算机工程与应用》2003年第28期10-12,17,共4页Computer Engineering and Applications

基　　金：科技部863项目"空间信息移动用户系统"资助(编号:2001AA136030)

摘　　要：协作GIS(CoGIS)系统的通信机制不同于WebGIS、网络GIS,其关键在于在所有的协作成员之间建立起通信链路,以保证成员之间的相互感知与协同。在此基础上,文章从CoGIS系统体系结构出发,采用直接通信和混合通信的通信方式来建立成员间的通信链路,设计并实现了连接层-数据层-控制层的通信模型,支持了成员的多媒体通信和消息通信需求,实现了一种实用、简单、可扩展的通信机制。Communication in CoGIS is very different from that in WebGIS and Network GIS,and its key lies in providing links between cooperative members to guarantee their awareness of each other and cooperation.Then,based on CoGIS architecture writers have brought forward,direct communication and mixed communication are both adopted,a communication model with″connection layer -data layer -control layer″structure is designed,therefore,multimedia communication and message communication between members are supported,and a practical,easy and extensible communication mechanism is provided.

关 键 词：通信方式 通信接口 消息 消息分类 

分 类 号：TN915[电子电信—通信与信息系统]