Utility Fair Optimisation of Antenna Tilt Angles in LTE Networks

TL;DR

This paper presents a convex optimization approach for utility fair antenna tilt angle adaptation in LTE networks, enabling efficient and distributed optimization using existing measurements.

Contribution

It reformulates a non-convex problem as convex under certain conditions and develops a lightweight, distributed method for optimal antenna tilt adjustment.

Findings

Convex reformulation of the tilt optimization problem.

Development of a distributed optimization algorithm.

Effective use of existing measurements for tilt adjustment.

Abstract

We formulate adaptation of antenna tilt angle as a utility fair optimisation task. This optimisation problem is non-convex, but in this paper we show that under reasonable conditions it can be reformulated as a convex optimisation. Using this insight, we develop a lightweight method for finding the optimal antenna tilt angles, making use of measurements which are already available at base stations, and suited to distributed implementation.