Abstract: The cache technology in the MANET environment is studied and a cooperative cache algorithm among groups is proposed.Cooperative cache algorithm among groups，which is on the basis of data using，completely considers the data access frequency，the distance from cache node to source node，data size and the data consistency.It realizes data caching among groups，which makes the caching data more reasonable and enhances the hit ratio of cache.The experiment shows that the method proposed in this paper not only remarkably reduces the energy cost of the query but also improves average responding time of queries．

摘要： 对MANET环境下的缓冲技术进行了研究，提出了一种组间协作缓冲算法。该算法充分考虑了数据的访问频率，数据缓冲节点到数据源节点的距离、数据的大小和数据的一致性。从缓冲数据的使用角度出发，实现了组间的协作缓冲，使缓冲的数据更合理化，提高了缓冲的命中率。实验证明，提出的算法能显著地减少查询执行的能量消耗，改善查询的平均响应时间。