Decentralized Caching and Coded Delivery with Distinct Cache Capacities

Amiri, Mohammad Mohammadi; Yang, Qian; Gündüz, Deniz

doi:10.48550/arxiv.1611.01579

Cited by 1 publication

(2 citation statements)

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“…They propose a novel coded caching scheme that creates and exploits multicasting opportunities across the users, and show that it outperforms uncoded caching. In [9], [18] it is shown that the benefits of coded caching extends to the decentralized setting, in which users cache random bits.…”

Section: Introductionmentioning

confidence: 99%

“…We extend the proposed delivery scheme for the centralized scenario to the decentralized setting, and characterize the corresponding achievable NDT. Previous works [9], [18] have focused on coding algorithms for this type of networks in noiseless channels, but, to the best of our knowledge, this paper represents the first attempt to address the interference management problem in a decentralized cache-aided interference network.…”

Section: Introductionmentioning

confidence: 99%

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Interference Networks with Caches at Both Ends

Roig¹,

Tosato²,

Gündüz³

2017

Preprint

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A KT × KR cache-aided wireless interference network, in which both the transmitters and the receivers are equipped with cache memories is studied. Each user requests one file from a library of N popular files. The goal is to design the cache contents without the knowledge of the particular user demands, such that all possible demand combinations can be satisfied reliably over the interference channel. The achievable sum degrees-of-freedom (sDoF) and the normalized delivery time (NDT) are studied for centralized and decentralized network architectures, respectively. First, using a combination of interference alignment (IA), zero-forcing (ZF) and interference cancellation (IC) techniques, a novel caching and transmission scheme for centralized networks is introduced, and it is shown to improve the sDoF upon the state-of-the-art. Then, the NDT is studied when the content placement at the receiver caches is carried out in a decentralized manner. Our results indicate that, for this particular network architecture, caches located at the receiver side are more effective than those at the transmitter side in order to reduce the NDT.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%