Abstract: As to the interruption problem of the task processing in the pervasive grid.A transfer strategy of mobile devices in grid environment is proposed in this paper，which realizes the mobile device transfer automatically as the task continue processing.The trigger switch algorithm and target selection algorithm make the pervasive device choose the most valuable resource automatically and the seamless transfer algorithm realize the task’s uninterruptible processing all the time.Theories and experiments prove the efficiency of the transfer strategy.

Key words: pervasive grid, seam lessmobility, handover algorithm, signal intensity

摘要： 针对目前普适网格中移动设备在迁移过程中出现的任务执行的不连续性问题，提出了一种在网格环境中普适设备的迁移策略，实现了移动设备在所提交的网格任务不中止执行的情况下，能够根据当前的环境自动进行迁移。其中触发切换算法和目标选择算法使得普适设备在迁移过程中能够主动地选择有效的资源进行切换，任务的无缝迁移算法则达到了在迁移过程中普适设备提交的网格任务能够不间断执行的要求，并且通过理论与实验证明了该策略的有效性。

关键词: 普适网格, 无缝迁移, 切换算法, 信号强度