移动计算技术

A Survey of Mobile Computing

移动计算指网络中在一个节点开始的计算可移动到其他节点继续执行的技术,方法主要是基于代码移动计算技术。其关键技术包括语义模型定义,以及支持代码移动语言的移动性、安全性和对象代码信任等。Mobile Agent是其主要应用领域。它的逻辑层包括网络传递层、服务层、接口层、语言解释层等5层。基于Mobile Agent的WWW服务系统,其资源访问在同一系统进程间通信,不影响原有资源服务,可保持与传统的WWW系统兼容。其信息搜寻包括Agent初始化,根据路由策略将信息转移到Server A或到下一个Server B。若网络阻塞,则可将信息暂驻在网络中的Desk服务器,以此实现信息的转移和下载。

In computer network, mobile computing is the technology which a computing in some node can be moved into other node to run. Code mobile is an important part for mobile computing, its key technologies include the definitions of semantic models, its support languages security object code. Mobile agent which can be divided into transfer layer, server layer, interface layer, and interpreter layer etc, is one of its application fields. The resource visiting and communication between processes can be made in WWW system with mobile agent, and has not influence on original resource service, and WWW system is compatible with its old system. An information seeking procedure includes initial parameter, and data is moved to server A or server B according to some route policies. If a network is blocked, data can be moved into desk server where data can be moved or download.