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Fundamental limits of latency in a cache-aided 4×4 interference channel

Pujol Roig, J. S ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1109/ITW.2017.8278043
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2018
  4. Abstract:
  5. Fundamental limits of communication is studied in a 4 × 4 interference network, in which the transmitters are equipped with cache memories. Each of the receivers requests one file from a library of N equal-size files. The caches at the transmitters are filled without the knowledge of the user demands, such that all possible demand combinations can be satisfied reliably over the interference channel. The achievable normalized delivery time (NDT) is studied under centralized cache placement. By combining the interference alignment (IA) and zero-forcing (ZF) techniques, a novel caching and transmission scheme is presented, and is shown to be optimal for all possible cache sizes; fully characterizing the NDT for the 4× 4 interference network with caches at the transmitter side. © 2017 IEEE
  6. Keywords:
  7. Cache-aided networks ; Normalized delivery time ; Zero forcing ; Cache memory ; Information theory ; Transmissions ; Transmitters ; Cache placement ; Centralized caching ; Delivery time ; Interference alignment ; Interference channels ; Interference networks ; Transmission schemes ; Zero-forcing ; Signal interference
  8. Source: IEEE International Symposium on Information Theory - Proceedings, 6 November 2017 through 10 November 2017 ; Volume 2018-January , 2018 , Pages 16-20 ; 21578095 (ISSN); 9781509030972 (ISBN)
  9. URL: https://ieeexplore.ieee.org/document/8278043