Non-symmetric coded caching for location-dependent content delivery
Mahmoodi, Hamidreza Bakhshzad; Salehi, Mohammad Javad; Tölli, Antti (2021-09-01)
H. B. Mahmoodi, M. Salehi and A. Tölli, "Non-Symmetric Coded Caching for Location-Dependent Content Delivery," 2021 IEEE International Symposium on Information Theory (ISIT), 2021, pp. 712-717, doi: 10.1109/ISIT45174.2021.9518026
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https://urn.fi/URN:NBN:fi-fe2021102051676
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Abstract
Immersive viewing is emerging as the next interface evolution for human-computer interaction. A truly wireless immersive application necessitates immense data delivery with ultra-low latency, raising stringent requirements for next-generation wireless networks. A potential solution for addressing these requirements is through the efficient usage of in-device storage and computation capabilities. This paper proposes a novel location-based coded cache placement and delivery scheme, which leverages the nested code modulation (NCM) to enable multi-rate multicasting transmission. To provide a uniform quality of experience in different network locations, we formulate a linear programming cache allocation problem. Next, based on the users’ spatial realizations, we adopt an NCM based coded delivery algorithm to efficiently serve a distinct group of users during each transmission. Numerical results demonstrate that the proposed location-based delivery method significantly increases transmission efficiency compared to state of the art.
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