策略冲突类型的细化及检测方法的改进

在分析策略冲突研究现状的基础上,针对策略冲突分类不完善,缺乏有效判断事件重叠的手段,对应用相关冲突的研究相对偏少等问题,改进了策略冲突类型的划分标准;对模态冲突检测补充了事件重叠判断算法,对应用相关冲突检测则提出了附加属性标签方法;新增了属主级别优先和新加载策略优先的冲突解决方案,并对两方案相结合的方法进行了仿真.仿真结果表明,这些方法补充了已有研究的不足,在解决策略冲突时有良好的效果,在相同的系统背景下与原有的方法相比,其有效率提高了10%～27%.

Style Refinement and Detection Improvement of Policy Conflict

After the current state of policy conflict is overviewed, several limitations are pointed out, including that the detailed classification is not unique, the conflict detection is not perfect and complete, the judgment of events overlap is still a blank, the attention paid on solving application specific conflict is not enough. To settle these problems, policy conflict is reclassified, event overlap judgment arithmetic is supplied to detect modal conflict, property tag attachment method is put forward to detect application specific conflict, several measures of high owner level first and later load first are described to resolve policy conflict, and simulation for combined measure is made. These methods are necessary supplement for the known methods and effective to solve policy conflict, and it is shown in simulation results that the efficiency of combined measure is up by 10% to 27% compared with original methods in the same system circumstance.