A Performance Analysis of End-to-End Fragmentation in Content-Centric Networking

In the research of content-centric networking (CCN), there have been investigated several fragmentation methods of CCN messages in order to implement CCN as an L3 protocol. The latest version of the CCN protocol (CCN 1.0) adopts the end-to-end fragmentation method that fragments CCN messages only at the content publisher. This allows intermediate routers to simply forward fragmentation packets, and hence this can solve the problem of the processing delay at routers in the existing fragmentation methods for the CCN. However, the end-to-end fragmentation has not been well-analyzed and well-evaluated yet. In this paper, we analyze the end-to-end fragmentation and clarify its important parameter for the efficient transmission. Moreover, we evaluate fragmentation methods for the cache-hit ratio and the header overhead, and we clarify advantages and disadvantages of the methods in terms of the transmission efficiency.