Adaptive TTL Control to Minimize Resource Cost in Hierarchical Caching Networks

Satoshi IMAI  Kenji LEIBNITZ  Masayuki MURATA  

Publication
IEICE TRANSACTIONS on Information and Systems   Vol.E98-D   No.3   pp.565-577
Publication Date: 2015/03/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.2014NTP0011
Type of Manuscript: Special Section PAPER (Special Section on the Architectures, Protocols, and Applications for the Future Internet)
Category: Internet Architecture and Protocols
Keyword: 
cache aging,  Time-To-Live,  content dissemination,  in-network caching,  content-centric networking,  Newton's method,  

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Summary: 
Content caching networks like Information-Centric Networking (ICN) are beneficial to reduce the network traffic by storing content data on routers near to users. In ICN, it becomes an important issue to manage system resources, such as storage and network bandwidth, which are influenced by cache characteristics of each cache node. Meanwhile, cache aging techniques based on Time-To-Live (TTL) of content facilitate analyzing cache characteristics and can realize appropriate resource management by setting efficient TTLs. However, it is difficult to search for the efficient TTLs in a distributed cache system connected by multiple cache nodes. Therefore, we propose an adaptive control mechanism of the TTL value of content in distributed cache systems by using predictive models which can estimate the impact of the TTL values on network resources and cache performance. Furthermore, we show the effectiveness of the proposed mechanism.