Abstract：In-network caching is always a hot topic in the research of Information-Centric Networking (ICN). Most of traditional caching coordination research use uniform caching policies within the same cache network, but the aim of different network part is quite various, thus the existed schemes are hard to achieve a comprehensive performance optimization or hard to scale. Additionally, most work fail to adapt to the on-path coupling effect content caching and request routing. This paper proposes and evaluates novel domain-orientated coordinated hybrid content caching and request search in ICN, which fully exploit content- space partitioning and divide the cache network into a core area and several edge areas. The off-path HASH-based coordination scheme is applied to core area and on-path reversion scheme is deployed in edge areas. The binary tuple is created to record the information of content placement and guides the request routing. Through simulation and comparison, it is found that the proposed policies yield better tradeoff between network-centric and user-centric performance than traditional schemes, and are scalable to be used in large ISPs.
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