【摘要】 针对NDN固有数据缓存机制存在数据内容多样性低、频繁替换等问题，提出了一种数据分级缓存方法 .该方法将传输路径上的路由器进行等级划分，根据数据内容热度，将其缓存在相应等级的路由器中，以减少用户获取数据内容的时间.实验结果表明：该方法能够有效提高缓存命中率，减少平均路由跳数，降低平均请求时延.更多还原

【Abstract】 In order to address the problems of low diversity of data content and frequent replacement in the inherent data caching mechanism of NDN, a hierarchical data caching method is proposed. This method classifies the routers on the transmission path and caches them in the routers of the corresponding level according to the popularity of the data content, so as to reduce the time for users to obtain the data content. The experimental results show that this method can effectively improve the cache hit ratio, reduce the average route hops and reduce the average request delay.更多还原