Vu Xuan, Thang and Trinh Anh, Vu and Lei, Lei and Chatzinotas, Symeon and Ottersten, Bj¨orn
(2019)
Linear Precoding Design for Cache-aided Full-duplex Networks.
In: IEEE Wireless Communications and Networking Conference, 15-19 April 2019, Marrakech, Morocco.
(In Press)
Abstract
Edge caching has received much attention as a
promising technique to overcome the stringent latency and data hungry challenges in the future generation wireless networks. Meanwhile, full-duplex (FD) transmission can potentially double the spectral efficiency by allowing a node to receive and transmit simultaneously. In this paper, we study a cache-aided FD system via delivery time analysis and optimization. In the considered system, an edge node (EN) operates in FD mode and serves users via wireless channels. Two optimization problems are formulated
to minimize the largest delivery time based on the two popular
linear beamforming zero-forcing and minimum mean square
error designs. Since the formulated problems are non-convex
due to the self-interference at the EN, we propose two iterative optimization algorithms based on the inner approximation method. The convergence of the proposed iterative algorithms is analytically guaranteed. Finally, the impacts of caching and the advantages of the FD system over the half-duplex (HD) counterpart are demonstrated via numerical results.
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