Smart Resource Allocation: Beyond the Optimum

TL;DR

This paper proposes a practical, LTE-compatible resource allocation scheme for broadcast scenarios with multiple antennas, addressing interference and feedback challenges to maximize system sum rate.

Contribution

It introduces a novel, realistic resource allocation method that balances complexity between the base station and user devices, compatible with LTE standards.

Findings

Maximizes sum rate in broadcast MIMO scenarios

Reduces feedback requirements for practical implementation

Compatible with LTE standards without major modifications

Abstract

Dealing with broadcast scenarios has become a relevant topic in the scientific community. Because of interference, resource management presents a challenge, specially when spatial diversity is introduced. Many researches presented theoretical benchmarks, simplifications and low complex schemes, but in fact it is difficult the real implementation. The major part of current works propose iterative solutions, which are far away of feasible results. Since the problem is not convex, iterative solutions are prohibitive. Moreover, they always require the full knowledge of the channel state information. Hence, the feedback channel is often unaffordable and makes impossible to carry a huge amount of information. The present work aims to fill this gap presenting a novel scheme, from the theoretical framework to realistic scheme. It introduces the solution of the maximization of the sum rate in the broadcast scenario with multiple antennas at the transmitter. This solution aims to be realistic and to distribute the complexity between the base station and user equipment. Also, due to its construction, it opens the door to be compatible with LTE standards with no relevant changes. Thus, it allows to combine the resource allocation with scheduling tasks in a LTE environment, fulfilling the feedback requirements and maximizing the sum rate of the system.