信息中心网络（ICN）是未来互联网的重要发展方向。网内缓存是ICN的重要特征，对ICN传输性能具有重要影响。本项目针对现有研究的不足，结合“核心区域”和“边缘区域”的各自特点，围绕缓存部署、内容发现、内容访问三个关键问题，旨在提出一套基于区域划分的ICN网内缓存服务方法，内容包括：（1）结合核心区域和边缘区域各自特点,分别建立涵盖内容放置和容量分配的缓存部署模型，拟提出核心区域和边缘区域的缓存部署方法；（2）在核心区域，建立涵盖宣告收益和失效代价模型，拟提出基于缓存宣告的内容发现机制；在边缘区域，考虑内容热度和访问延迟，拟提出基于索引信息的内容发现机制。（3）在核心区域，建立访问路径选择及其流量分配模型，拟提出基于多路径的内容访问方法；在边缘区域，完善失效索引的处理机制，拟提出涵盖失效索引快速恢复的内容访问方法。本项目的预期成果将有利于改善用户体验，同时降低网络服务提供商的运营成本。

Information-Centric Networking (ICN) is an important development direction of future Internet research. In-network caching is an important feature for ICN and has a significant impact on ICN’s transmission performance. Concerning the drawbacks of current studies, focusing on characteristics of “core area” and “edge area”, in terms of cache employment, content discovery and content access, this project proposes an area-division-based ICN in-network caching service method. Contents include: (1) Concerning respective features of both core area and edge area, we plan to build cache deployment models on content placement and capacity allocation and propose cache deployment methods for both core area and edge area. (2) In the core are, we plan to construct the content-announcement-benefit model and the announcement-invalidation-cost model, and propose a cache-announcement-based content discovery method. In the edge area, considering content popularity and access delay, we plan to propose an index-information-based content discovery method. (3) In the core area, we build a content access path selection and flow allocation model, and plan to propose a multi-path-based content access method. In the edge area, we improve the invalid index processing method, and plan to propose a content access method including quick recovery of invalid indexes. The expected achievements of this project are beneficial to improve users’ quality of experience and decrease operational costs of Internet service provider.