Cache-aided non-orthogonal multiple access

Xiang L, Ng DWK, Ge X, Ding Z, Wong VW, Schober R (2018)

Publication Type: Conference contribution

Publication year: 2018


Publisher: Institute of Electrical and Electronics Engineers Inc.

Book Volume: 2018-May

Conference Proceedings Title: IEEE International Conference on Communications

Event location: Kansas City, MO US

ISBN: 9781538631805

DOI: 10.1109/ICC.2018.8422140


In this paper, we propose a novel joint caching and non-orthogonal multiple access (NOMA) scheme to facilitate advanced downlink transmission for next generation cellular networks. In addition to reaping the conventional advantages of caching and NOMA transmission, the proposed cache-aided NOMA scheme also exploits cached data for interference cancellation which is not possible with separate caching and NOMA transmission designs. Furthermore, as caching can help to reduce the residual interference power, several decoding orders are feasible at the receivers, and these decoding orders can be flexibly selected for performance optimization. We characterize the achievable rate region of cache-aided NOMA and investigate its benefits for minimizing the time required to complete video file delivery. Our simulation results reveal that, compared to several baseline schemes, the proposed cache-aided NOMA scheme significantly expands the achievable rate region for downlink transmission, which translates into substantially reduced file delivery times.

Authors with CRIS profile

Involved external institutions

How to cite


Xiang, L., Ng, D.W.K., Ge, X., Ding, Z., Wong, V.W., & Schober, R. (2018). Cache-aided non-orthogonal multiple access. In IEEE International Conference on Communications. Kansas City, MO, US: Institute of Electrical and Electronics Engineers Inc..


Xiang, Lin, et al. "Cache-aided non-orthogonal multiple access." Proceedings of the 2018 IEEE International Conference on Communications, ICC 2018, Kansas City, MO Institute of Electrical and Electronics Engineers Inc., 2018.

BibTeX: Download