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Poster: Impact of traffic characteristics on request aggregation in an NDN router

Ahmadi, M ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.23919/IFIPNetworking46909.2019.8999462
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2019
  4. Abstract:
  5. The paper revisits the performance evaluation of caching in a Named Data Networking (NDN) router where the content store (CS) is supplemented by a pending interest table (PIT) which aggregates requests for a given content that arrive within the download delay. We extend prior work on caching with non-zero download delay by proposing a novel mathematical framework that is applicable to general traffic models and alternative cache insertion policies. Specifically we consider the impact of time locality in demand due to finite content lifetimes and we evaluate the use of an LRU filter to improve CS hit rate performance. The analysis is used to demonstrate that the impact of the PIT on upstream bandwidth reduction is significant only for relatively small content catalogues or high average request rate per content. We also show that the filter can be counterproductive when contents have finite lifetimes and traffic intensity is low. © 2019 IFIP
  6. Keywords:
  7. Bandwidth reductions ; Cache insertion policies ; Mathematical frameworks ; Named data networkings ; Request aggregations ; Traffic characteristics ; Traffic intensity ; Traffic model
  8. Source: 2019 IFIP Networking Conference, IFIP Networking 2019, 20 May 2019 through 22 May 2019 ; Volume 2019-January , 2019 ; 9783903176164 (ISBN)
  9. URL: https://ieeexplore.ieee.org/document/8999462