基于旅行图的移动Agent迁移策略

移动Agent为完成用户指定的任务，通常需要移动到多个主机上．迁移策略为移动Agent规划出最佳迁移路径，保证移动Agent正确、高效地完成任务．提出了“旅行图”的概念并给出了基于“旅行图”的3种迁移策略．旅行图能描述移动Agent的移动语义并能刻画运行环境的动态变化．载有“旅行图”的移动Agent感知运行环境的变化，及时反应并自主修改迁移路线，按照预先设定的指标完成任务，充分体现了Agent的反应性和自主性．基于“旅行图”的迁移策略还可避免由网络断连或结点失效导致的迁移失败．

Migration Strategies of Mobile Agent Based on Itinerary Graph

Mobile agent needs to migrate to several hosts for accomplishing its task. Migration strategy is responsible for planning out an optimal migration path, which ensures mobile agent to complete its task correctly and efficiently. In this paper, the concept of itinerary graph and three migration strategies based on itinerary are presented. Itinerary graph can describe the migration semantics and reflect the changes of environment where mobile agent lives. Mobile agent with itinerary graph can perceive these changes, react immediately, modify migration path autonomously, and accomplish its task according to certain specified criteria, embodying the reactivity and autonomy of agent. These migration strategies can also avoid migration failure caused by network disconnection or node crashing.