English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Device-to-device (D2D) communications, which can increase system throughput, allow two cellular devices to communicate directly with each other. Compared with half-duplex relay, full-duplex relay can significantly improve the spectrum efficiency if the self-interference can be efficiently eliminated. This paper proposes a D2D communication scheme, which assigns the fixed D2D transmitter as full-duplex amplify-and-forward relay to assist cellular uplink transmission. Cellular user close to the fixed D2D transmitter can directly download the video by D2D communications. An optimization problem is formulated to maximize the uplink rate of cellular user while guaranteeing the rate requirement of D2D user. We first obtain the feasible region of the power splitting factor, which characterizes the proportion of fixed D2D transmitter power allocated to cellular uplink and D2D communications. Then, a closed-form expression of the optimal power allocation scheme is derived. Also simulation results are presented to validate the proposed optimal power allocation scheme for uplink rate maximization.

Power Allocation for Maximizing Uplink Rate Over Full-Duplex Relay-Based D2D Communication Underlying Cellular Networks