Optimal Multi-View Video Transmission in OFDMA Systems

TL;DR

This paper proposes an energy-efficient transmission scheme for multi-view videos in OFDMA systems, leveraging view synthesis to enhance multicast efficiency and reduce energy consumption.

Contribution

It introduces a novel transmission model and formulates an optimization problem for view selection and resource allocation, incorporating view synthesis-enabled multicast opportunities.

Findings

View synthesis-enabled multicast improves transmission efficiency.

The proposed algorithm achieves near-optimal energy savings.

Numerical results validate the benefits of view synthesis in OFDMA systems.

Abstract

In this letter, we study the transmission of a multi-view video (MVV) to multiple users in an Orthogonal Frequency Division Multiple Access (OFDMA) system. To maximally improve transmission efficiency, we exploit both natural multicast opportunities and view synthesis-enabled multicast opportunities. First, we establish a communication model for transmission of a MVV to multiple users in an OFDMA system. Then, we formulate the minimization problem of the average weighted sum energy consumption for view transmission and synthesis with respect to view selection and transmission power and subcarrier allocation. The optimization problem is a challenging mixed discrete-continuous optimization problem with huge numbers of variables and constraints. A low-complexity algorithm is proposed to obtain a suboptimal solution. Finally, numerical results further demonstrate the value of view synthesis-enabled multicast opportunities for MVV transmission in OFDMA systems.